ML23137A135

NPDES Receiving Water Monitoring Program 2022 Annual Report

ML23137A135
Person / Time
Site:	Diablo Canyon
Issue date:	04/18/2023
From:	Pacific Gas & Electric Co, Tenera Environmental Services
To:	Office of Nuclear Reactor Regulation
Shared Package
ML23137A170	List: DCL-2023-512, Submittal of Receiving Water Monitoring Program 2022 Annual Report ML23137A135
References
ESLO2023-004, DCL-2023-512
Download: ML23137A135 (1)

Text

Pacific Gas and Electric Company Diablo Canyon Power Plant NPDES RECEIVING WATER MONITORING PROGRAM: 2022 ANNUAL REPORT April 18, 2023 ESLO2023-004 Submitted to: Prepared by:

Pacific Gas and Electric Company Tenera Environmental Diablo Canyon Power Plant 141 Suburban Road , Suite A2 Avila Beach , CA 93424 San Luis Obispo , CA 93401 Phone: 805.541.0310 FAX: 805.541.0421

Table of Contents Table of Contents TABLE OF CONTENTS ............................................................................................................ II TABLE OF FIGURES ................................................................................................................ 111 TABLE OF TABLES .................................................................................................................. IV

1.0 INTRODUCTION

.......................................................................................................... 1-1 2.0 TEMPERATURE MONITORING .............................................................................. 2-1 3.0 INTERTIDAL ALGAE AND INVERTEBRATES .................................................... 3-1 4.0 INTERTIDAL FISHES ................................................................................................. 4-1 5.0 SUBTIDAL ALGAE AND INVERTEBRATES ......................................................... 5-1 6.0 SURFACE CANOPY KELPS ...................................................................................... 6-1 7.0 SUBTIDAL FISHES ...................................................................................................... 7-1 8.0 PROJECT PERSONNEL ............................................................................................. 8-1 9.0 LITERATURE CITED ................................................................................................. 9-1 APPENDIX A. Intertidal Temperatures APPENDIX B. Subtidal Temperatures APPENDIX C. Intertidal Algae, Invertebrates and Substrates (HBT Method)

APPENDIX D. Intertidal Fishes (VBT Method)

APPENDIX E. Subtidal Algae and Invertebrates (SAQ Method)

APPENDIX F. Subtidal Algae (SLC Method)

APPENDIX G. Subtidal Invertebrates (SFQ Method)

APPENDIX H. Subtidal Fishes (SFO Method)

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Table of Figures Table of Figures Figure 1. Location of the Diablo Canyon Power Plant. .............................................................. 1-1 Figure 2. Locations of intertidal temperature monitoring stations.............................................. 2-1 Figure 3. Locations of subtidal temperature monitoring stations ............................................... 2-2 Figure 4. Seawater temperatures in 2022 recorded in control areas, South Diablo Cove, North Diablo Cove, and Field's Cove for: a) intertidal; and b) subtidal. Mean, maximum, and minimum temperatures are shown by month for each area (see text for temperature recording stations used in this figure) ................................................................................ 2-4 Figure 5. DCPP 2022 average daily intake and discharge seawater temperatures (°C), and daily cooling water discharge volume (MGD) ................................................................... 2-5 Figure 6. Locations of horizontal band transect stations ............................................................ 3-1 Figure 7. Locations of vertical band transect stations for sampling intertidal fishes ................. .4-1 Figure 8. Locations of subtidal benthic stations......................................................................... 5-1 Figure 9. Map of surface kelp in Diablo Cove based on visual inspection from the shore on October 26, 2022 ................................................................................................................ 6-1 Figure 10. Locations of subtidal fish observation transects ........................................................ 7-1

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Table of Tables Table of Tables Table 1. Tasks, stations, and frequency of surveys for the DCPP RWMP, 2022. (See text for sampling method descriptions and station locations) ......................................................... 1-2

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1.0 Introduction 1.0 Introduction The Diablo Canyon Power Plant (DCPP) is a nuclear power plant located on the central coast of California between Avila Beach and Morro Bay (Figure 1). The facility uses seawater from the Pacific Ocean for cooling. The seawater enters the plant through a shoreline intake structure in the Intake Cove and is discharged via a shoreline outfall in Diablo Cove. Monitoring of the marine environment near the Diablo Canyon Power Plant (DCPP) is required by WDR Order No. 90-09 (National Pollutant Discharge Elimination System (NPDES) Permit No. CA0003751),

as revised in a letter from the Central Coast Regional Water Quality Control Board in December 1998. The monitoring is conducted under the Receiving Water Monitoring Program (RWMP) in accordance with the NPDES Permit.

(North Control la located 1.7 km north of Field's Cove) ll"2l"O"N 3&"2CIV"N 35"15"0"N 3S-51)"N 0_ 2.a S 1D \S KHomlltlt"S

• - c=--=:::::i1 121'"0'0-W 120"55"0-W 120'"50-0-W 120"45'0-W 120"40'0 Figure 1. Location of the Diab lo Canyon Power Plant.

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1.0 Introduction This report presents the seawater temperature and biological data collected for the 2022 reporting period from the RWMP intertidal and subtidal monitoring tasks (Table 1). The sampling methods for each task are described in the report, and summary statistics from the 2022 sampling are presented in the report appendices.

Table 1. Tasks, stations, and frequency of surveys for the DCPP RWMP, 2022. (See text for sampling method descriptions and station locations).

Task and Sampling Frequency Stations Temperature Monitoring Intertidal (recorded every 20 min) NC 2, FC 1, FC 2, FC 3, NOC 1, NOC 2, NOC 3, SOC 1, SOC 2, SOC 3, SOP 1, SOP 2, SC 1, and SC 1-V Subtidal (recorded every 20 min) NC 1 -3m, FC 1 -3m, NOC 2 -3m, NOC 3 -3m, NOC 4 -4m, SOC 1 -3m, SOC 4 -4m, SC 1 -3m, and SC 2 -6m Intertidal Horizontal Band Transects (algae, seagrasses, invertebrates, substrate) 4 surveys per year NC 1, NC 2, FC 1, FC 2, FC 3, NOC 1, NOC 2, NOC 3, SOC 1, SOC 2, SOC 3, SOP 1, SOP 2, and SC 1 Intertidal Vertical Band Transects (fishes) 4 surveys per year NC 1V, FC 1V, NOC 1V, SOC 2V, and SC 1V Subtidal Benthic Stations (algae, invertebrates, substrate) 4 surveys per year FC 1 -3m, NOC 2 -3m, NOC 3 -3m, NOC 4 -4m, SOC 2 -3m, SOC 3 -4m, SC 1 -3m, and SC 2 -6m Subtidal Fish Observations (fishes) 4 surveys per year FC F0-1 , FC F0-2, FC F0-3, NOC F0-1 , NOC F0-2, NOC F0-3, SOC F0-1 ,

SOC F0-2, SOC F0-3; SC F0-1, SC F0-2, and SC F0-3 Habitat-Forming Kelp Survey (bull kelp, giant kelp) 1 survev oer vear Oiablo Cove Intertidal and subtidal stations included in the RWMP are located in six areas: South Diablo Cove (SDC), North Diablo Cove (NDC), South Diablo Point (SDP), Fields Cove (FC), South Control (SC), and North Control (NC). Two sites (SC and NC) are sufficiently far from the plant that they do not experience increased seawater temperatures due to the discharge.

The sampling was completed during 2022 in accordance with the NPDES permit. Habitat-forming kelp surveys were conducted once in 2022. Sampling for the remaining five tasks in Table 1 occurred during four discrete time-periods (surveys) in 2022. The specific date a station was sampled within each survey was influenced by logistics, staffing resources, weather, sea state, and tide conditions. The survey date of each task listed in the appendix tables represents the mean date for the time period within which the task was completed.

All monitoring tasks and surveys were completed in the 2022 reporting period. This report does not include analysis or discussion of the results of the biological and temperature monitoring.

Comprehensive analyses of changes in the marine environment resulting from the DCPP discharge have been presented in Tenera (1988, 1997, 1999a, 1999b, and 2002).

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• DCPP-RWMP 2022 Annual Report 1-2

2.0 Temperature Monitoring 2.0 Temperature Monitoring Intertidal and subtidal seawater temperatures were recorded at permanent stations located along the Oiablo Canyon coastline. Temperature units at the intertidal stations shown in Figure 2 were located along the rocky shore at the +0.6 m (+2 .0 ft) mean lower low water (MLLW) elevation.

The temperature recorders at the subtidal locations shown in Figure 3 were located at depths of-3 m, -4 m, or-6 m (- 10 ft, -13 ft, or-20 ft) MLLW. The naming designation for each station reflects the area location and station number. The station depth is indicated for the subtidal stations e.g., NDC 1 -3 mis North Diablo Cove subtidal Station 1 at a depth of -3 m (-10 ft)

MLLW (see Table 1).

Point San Luis 0 2.5 5

- - ,KJlomelers Figure 2. Locations of intertidal temperature monitoring stations.

There were 13 stations in Diablo Cove regularly contacted by the discharge plume:

Intertidal: NDC 1, NDC 2, NOC 3, SOC 1, SDC 2, SOC 3, SDP 1, and SDP 2.

Subtidal: NDC 2 -3m, NDC 3 -3m, NDC 4 -4m, SDC 1 -3m, and SDC 4 -4m.

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2.0 Temperature Monitoring There were four stations in Field's Cove, approximately one kilometer upcoast from Diablo Cove, contacted intermittently by the discharge plume:

Intertidal: FC 1, FC 2, and FC 3.

Subtidal: FC I -3m.

There were six control stations outside the influence of the discharge, which measured ambient ocean temperatures:

Intertidal: NC 2, SC I , and SC IV Subtidal: NC I -3m, SC 1 -3m, and SC 2 -6m The intertidal stations in South Control (SC 1) and Stillwater Cove (SC 1V) use the same acronym but are located in different locations as shown in Figure 2.

Point San Luis 0 2.5 5

- - 1t<ilometers Figure 3. Locations of subtidal temperature monitoring stations.

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• DCPP-RWMP 2022 Annual Report 2-2

2.0 Temperature Monitoring Each temperature instrument synchronously logged temperatures every 20 minutes throughout its deployment period. Instrument precision was 0.025°C with an accuracy of+/- 0.05°C.

Temperature units were deployed at a station for approximately 60-90 days and then exchanged with a serviced, calibrated unit. Data from the intertidal temperature units were deleted prior to analysis when tide levels were less than the height of the sensors (+0.6 m [+2.0 ft] MLLW). Tide levels were determined using data from NOAA tide gauges at Morro Bay and Port San Luis.

Monthly statistics on the seawater temperatures recorded at the intertidal and subtidal temperature monitoring stations in 2022 are presented in Appendix A and Appendix B, respectively. Below is a summary of seawater temperatures recorded in 2022, based on data from temperature recording stations in the control areas, North Diablo Cove, South Diablo Cove, and Field's Cove.

Based on mean monthly temperature data, seawater temperatures throughout the study area are generally coolest from February through May and warmest from August through November.

Measured seawater temperatures are coolest in the control areas, and warmest in Diablo Cove.

Intertidal monthly mean, maximum, and minimum temperatures recorded in 2022 at the +0.6 m

(+2.0 ft) (ML WW) elevation at stations in North Control (NC2), South Diablo Cove (SOC 2),

North Diablo Cove (NDC 2), and Field's Cove (FC 2) are shown in Figure 4a. Monthly mean ambient seawater temperatures at the North Control station ranged from a low of 10.9°C (51.6°F) in April to a high of 15.0°C (59.0°F) in September. Intertidal seawater temperatures are usually warmest at the Diablo Cove stations from late summer to early fall. Compared to the control station, intertidal seawater temperatures averaged 3.6°C (6.5°F) warmer in South Diablo Cove and 3.9°C (7.0°F) warmer in North Diablo Cove. Intertidal seawater temperatures at the Field's Cove station were l.2°C (2.2°F) warmer than the control station, on average. One of the intertidal temperature units at South Diablo Point (SDP 2) malfunctioned during a deployment and data were not recoverable from October 28 at 5:20 PM PST through the remainder of the calendar year (Appendix A, Table AS).

Subtidal monthly mean, maximum, and minimum temperatures recorded in 2022 at -3 m MLL W in South Control (SC 1 -3m), South Diablo Cove (SDC 1 -3m), North Diablo Cove (NDC 2 -

3m), and Field's Cove (FC 1 -3m) are shown in Figure 4b. The subtidal temperature unit at the Field's Cove (FC 1-3m) station malfunctioned during a deployment and data were not recoverable from January 28 at 12:00 PM PST through June 22 at 10:20AM PST. Since the majority of measurements were recovered from January, those data are included in Figure 4a, but insufficient data were collected in June to represent temperatures for the entire month.

Monthly mean ambient seawater temperatures at the South Control station ranged from a low of 10.5°C (50.9°F) in April to a high of 14.4°C (58.0°F) in September. Subtidal temperatures are usually warmest at the Diablo Cove stations in summer to early fall. Compared to the data from the control stations, subtidal temperatures averaged 2.9°C (5.2°F) warmer in South Diablo Cove and 4.2°C (7.6°F) warmer in North Diablo Cove. There were insufficient data to calculate an annual temperature difference between subtidal temperatures at the Field's Cove station and the control station.

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2.0 Temperature Monitoring a) I n t e rfd I a ITemoera t ures 77 24 70 20 56 12 49 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 2022 South Dlablo Cove North Dlablo Cove 0 Fields Cove b) S ubtidal T emoeratures 25 77 21 70 r , r

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56 13 49 Jan Feb Mar Apr May Jun Jul Aug Oct Nov 2022 Control South Dlablo Cove North Dlablo Cove D 'Fields Cove Figure 4. Seawater temperatures in 2022 recorded in control areas, South Diablo Cove, orth Diablo Cove, and Field's Cove for: a) intertidal; and b) subtidal. Mean, maximum, and minimum temperatures are shown by month for each area (sec text for temperature recording stations used in thi figure).

• Some data were not recoverable at the Fields Cove station for p011ions of January through June.

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2.0 Temperature Monitoring DCPP typically operates at full capacity; however, there were multiple periods in 2022 when one or two of the four main circulating water pumps (CWPs) were not in service due to scheduled or emergent unit outages and curtailments. This resulted in lower daily discharge volumes during these periods. The effects of four outages or curtailments during 2022 on daily discharge volumes can be seen in Figure 5. A brief description of each CWP outage or curtailment period is listed below.

• February 23 -25, 2022: Emergent Unit 1 curtailment to remove debris from unit main steam condenser that accumulated due to ocean high swells. One Unit 1 CWP removed from service.

• March 26 - April 24: Scheduled Unit 1 refueling outage (1R23). Two Unit 1 CWPs removed from service.

• April 25-26 (1-1) and April 28-29 (1-2): Emergent Unit 1 forced outage (1X24) for equipment repairs. One Unit 1 CWP removed from service.

• October 16- November 24: Scheduled Unit 2 refueling outage (2R23) which was extended due to emergent equipment repairs. Two Unit 2 CWPs removed from service.

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3.0 Intertidal Algae and Invertebrates 3.0 Intertidal Algae and Invertebrates Intertidal algae, seagrasses, and invertebrates were sampled using the horizontal band transect (HBT) sampling method at the locations shown in Figure 6. Most HBT stations consisted of two 30 m long transects oriented parallel to the waterline, one at the +0.9 m (+3 ft) MLL W tide level and the other at the +0.3 m (+ 1 ft) MLL W tide level. Stations SDP 1 and SDP 2 each consisted of one transect at the +0.9 m (+3 ft) tide level. The substrate at the +0.9 m (+3 ft) MLL W level at station SDC 1 was mainly uncolonized cobble. Therefore, the upper transect at that station was located at a lower elevation at the +0.6 m (+2 ft) MLLW tide level on bedrock where intertidal species were more abundant. The sampling area of each transect consisted of ten 1.0 m2 (10.8 ft2) permanent quadrats. The quadrats were mainly located on bedrock and boulders, but various amounts of cobble and sand that occurred seasonally were also sampled. Data from temperature sensors indicate that three control stations were located outside the influence of the DCPP thermal discharge, while the remaining 11 stations in Field ' s Cove, Diablo Cove, and on South Diab lo Point (south headland of Diab lo Cove) had varying levels of contact with the warm water from the discharge.

Point San Luis 0 2.5 5

- - 1K;1ometers Figure 6. Locations of horizontal band transect stations.

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3.0 Intertidal Algae and Invertebrates Percent cover for each algal and seagrass species was estimated visually. Coverage of overstory species were estimated first, and then the overstory branches and blades were moved aside to allow estimation of coverage for each understory species. Coverage of bare substrate was also recorded at this stage. Species that occupied less than 0.7% of the area of the quadrat were recorded as "present". Due to the overlapping layers of taxa, the total percent cover typically exceeded 100% in a quadrat.

The number oflarge mobile invertebrates (greater than 2.5 cm [l in], largest dimension) were counted in each of the ten quadrats for each transect. In five of the ten station quadrats ("count" quadrats ), select species of invertebrates were counted regardless of size. Species smaller than 2.5 cm (1 in.) not part of the select group were recorded as "present". The percent cover of sessile invertebrates, such as sponges and tunicates, was estimated using the same methods used for the intertidal algae. All black abalone, regardless of size, were counted in the ten permanent quadrats on each transect. In addition, black abalone in five additional quadrats on each transect that were previously sampled as part of the monitoring program were also counted.

The survey mean abundance or percentage cover, and the annual mean and standard deviation for each taxon at each transect level are presented in Appendix C. Survey means for algae and substrates were calculated from all ten quadrats along the transect, while the means for invertebrates were calculated from the five count quadrats. Before calculating the summary statistics in the appendices, taxa that were recorded as "present" in a quadrat were assigned a value of 0.01 if recorded as percent cover and a value of 1 ifrecorded as a count.

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• DCPP-RWMP 2022 Annual Report 3-2

4.0 Intertidal Fishes 4.0 Intertidal Fishes Intertidal fishes were sampled using the Vertical Band Transect (VBT) sampling method. At each of five stations (Figure 7), either two or three transects were positioned perpendicular to the shoreline at fixed locations. Each transect originated in the high intertidal zone (approximately

+ 1.5 m [4.9 ft] MLL W) and terminated in the low intertidal zone (approximately -0.2 m [0.6 ft]

MLL W). Transects at each station were separated by approximately 3 m (9.8 ft). Each transect was used as a reference line to position twelve 1.0 m 2 ( 10.8 ft2) permanent sampling quadrats, for a total of thirty-six quadrats per station. Two control stations were located beyond the influence of the DCPP thermal discharge, while the remaining three stations in Field's Cove and Diablo Cove had varying levels of contact with the warm water from the discharge.

Point San Luis 0 2.5 5

- - ,l(jiolneteB Figure 7. Locations of vertical band transect stations for sampling intertidal fishes.

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4.0 Intertidal Fishes Intertidal fishes were sampled within quadrats by lifting any moveable rocks and searching foliose algae. Fishes were captured in small hand nets, identified to the lowest practical taxonomic level, measured, and returned to the quadrat following sampling. Newly settled juvenile fishes were not identified to the species level but were grouped into composite taxa. The survey total, annual mean, and standard deviation for each taxon encountered at each station are presented in Appendix D.

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5.0 Subtidal Algae and Invertebrates 5.0 Subtidal Algae and Invertebrates Eight permanent subtidal benthic sampling stations are located at depths of -3 m, -4 m, or -6 m (-

10 ft, -13 ft, or -20 ft) MLL W (Figure 8). Two control stations are located in Patton Cove, beyond the influence of the DCPP thermal discharge, while the remaining six stations had varying levels of contact with the warm water from the discharge. Stations were circular with a radius of 3.1 5 m (10.33 ft), and a sampling area of28.0 m2 (301.4 ft2) . The center 3.1 m 2 (33.4 fi2) of each station nearest to a mooring anchor (railcar wheel) was not sampled in order to avoid any unnatural algal and invertebrate growth associated with the mooring. Each station was divided into four equal sections, or "arc quadrants", 7.0 m2 (75.3 fi2) in area. All stations were established primarily on substrates of mixed bedrock and boulders with varying amounts of cobble and sand.

Point San Luis 0 2.5 5

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-3m Figure 8. Locations of subtidal benthic stations.

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• DCPP-RWMP 2022 Annual Report 5-1

5.0 Subtidal Algae and Invertebrates Divers used three sampling methods at each station to sample the benthic algae and invertebrates. The first sampling method, the subtidal arc quadrant (SAQ) method, involved counting both kelp and macroinvertebrates. Kelp plants and select invertebrate taxa were counted regardless of the size. Individuals of other non-encrusting invertebrates were counted if they were larger than 2.5 cm (1.0 in) (length or width). Juvenile kelp plants that could not be identified to the species level were counted and recorded as "Laminariales". Five common species that generally occurred in numbers too high to accurately count in a large area were sampled in the same one-third area (2.33 m2 [25.l ft2]) of each quadrant. The count for each of these species was multiplied by three to provide an abundance estimate for the entire quadrant.

The second sampling method, the subtidal line contact (SLC) method, involved identification of understory algal species, habitat-forming sessile invertebrates, and substrates at randomized points within each arc quadrant. Fifty randomly selected contact points from the possible 100 points were sampled within each quadrant (a total of 200 points per station) using a marked reference line. The same set of sampling points was used at all stations during a survey, and a new set of randomized points was selected at the start of each survey. The occurrence of all algal species, sessile invertebrates, kelp holdfasts, and substrates observed directly under or over the sampling points was recorded. In each quadrant, algal species which were present but not contacted by any of the sample points were also recorded as "present". The percent cover of each taxon and substrate type at a station was calculated using the number of points contacted for each taxon and the total number of points sampled at that station.

The third sampling method, the subtidal fixed quadrat (SFQ) method, recorded the abundance of invertebrates in four permanent circular 0.25 m 2 (2. 7 ft2) quadrats. A quadrat was located within each of the four SAQ quadrants, generally on bedrock or boulder substrate. Depending upon the degree of topographical relief available at each station, two of the quadrats were located on horizontal-aspect surfaces and two quadrats were located on vertical-aspect surfaces. All non-encrusting taxa were identified and counted. The coverage of encrusting taxa (e.g., colonial/

social tunicates) was quantified in square inch units if the total equaled or exceeded 6.5 cm2 (1 square inch). Otherwise, the encrusting taxon was recorded as "present". The coverage estimates were converted to percentage cover for analysis.

The survey mean for each taxon at each station from the four surveys completed during the year are presented in Appendices E (SAQ), F (SLC), and G (SFQ). The survey means were calculated from the four quadrats or quadrants at each station. The annual mean and standard deviation for each taxon at each station was also calculated from the surveys sampled during the year. Algal taxa in the SLC study were given a value of 0.01 if recorded as present.

Additionally, encrusting taxa in the SFQ study, and invertebrates in the SAQ study recorded as present (no numeric value) were given a value of 0.1 if recorded as cover, or a value of 1 if recorded as a count for calculating abundance statistics.

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6.0 Surface Canopy Kelps 6.0 Surface Canopy Kelps The locations and extent of the surface kelp canopies of Nereocystis luetkeana (bull kelp) and Macrocystis pyrifera (giant kelp) in Diablo Cove - (Figure 8) were surveyed and mapped from direct observations. This task has been completed annually since the 1970s to document long-term changes in the annual maximum extent of the surface kelp canopies in Diablo Cove. Near the end of the annual growth cycle in October, nearly all bull kelp plants have reached the surface and can be counted. Surface canopies of giant kelp also tend to be abundant during this period. Two observers at the headland of North Diab lo Cove and two observers at the headland of South Diablo Cove (South Diablo Point) counted and mapped the distribution of individual bull kelp plants and mapped the spatial extent of giant kelp canopies (Figure 9). Bull kelp plants with bare bulbs only and no attached fronds, indicating senescence in the plants, were noted when observed.

The 2022 annual habit-forming kelp survey was conducted on October 26, 2022. Scattered beds of giant kelp were observed in Diablo Cove. Scattered bull kelp was observed in Diablo Cove (Figure 9). There are no appendix figures or data tables associated with this survey.

-==-c::11---====---

75 150 225 300 Meters N

-==-c::11---====---Feet 250 500 750 1,000 A Figure 9. Map of surface kelp in Diab lo Cove based on visual inspection from the shore on October 26, 2022.

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• DCPP-RWMP 2022 Annual Report 6-1

7.0 Subtidal Fishes 7 .0 Subtidal Fishes Visual counts of fishes were conducted by divers at 12 permanent subtidal stations (three stations in each of four areas) located within and outside of Diab lo Cove (Figure 10). Temperature sensor data indicated that three stations located in Patton Cove were beyond the influence of the DCPP thermal discharge. The temperature data indicated that the remaining nine stations in Field's Cove, North Diab lo Cove, and South Diablo Cove had varying levels of contact with the warm water from the discharge.

Point San Luis 0 2.5 5

- - 1l<ik>meters DIAB LO CANYON POWER PLANT Figure 10. Locations of ubtidal fish observation transects.

Each station consisted of a benthic and a midwater transect. Each transect was 50 m (164 ft) long by 4 m (13 ft) wide. The benthic transect was located 1 m (3 ft) above the bottom, and the midwater transect was located above and parallel to the benthic transect approximately midway between the surface and the bottom. A station was sampled by first deploying a fiberglass measuring tape along a pre-determined compass course. The tape delineated the centerline of the benthic and midwater transects for that station.

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• DCPP-RWMP 2022 Annual Report 7-1

7.0 Subtidal Fishes The transects on the three stations in each area crossed one another, resulting in a small overlap among the sampling areas for the transects. The small overlap did not affect the data summaries because the numbers of fish counted were averaged by area, and the mobility of most fish added to the independence of the transects.

A survey team consisted of two divers. Each diver counted fish at the benthic and the midwater transect, alternating the direction of sampling along the transect lines. This sampling technique allowed a more thorough inspection of potential fish habitats from all angles of view than would have been possible by a single diver progressing along a transect in only one direction. The data recorded for each transect was the average of the counts from both divers. Fish were identified to species, if possible, but juveniles of some species with similar appearances were combined into broader categories if necessary. During each survey, the stations (midwater and benthic transects) were usually sampled twice.

The mean abundance for each taxon by survey and area for benthic and midwater transects are presented in Appendix H for each of the four sampling areas. The tables also list the annual mean and standard deviation for each taxon. The survey dates shown for each area in the tables represent the average date of the combined stations sampled.

, , ESLO2023-004

,.!! 1 PG&E

• DCPP-RWMP 2022 Annual Report 7-2

8.0 Project Personnel 8.0 Project Personnel Project Personnel 2022 Tenera Environmental Principal Investigator/

Project Manager: Mr .. John Steinbeck Project Scientists. Ms. Emma Barton Mr. Gery Cox Mr. Chris Ehrler Mr. Andrew Harmer Ms. Kaitlin Johnson Mr. Parker Kalan Mr. Scott Kimura Ms. Francesca Nash Dr. Joe Phelan Mr. Steve Pengilley

• Mr. Jake Roth Mr. Peter VanderBloomer Mrs. Tessa Victor Ms. Hailey Whitehead Ms. Kim Whiteside Project Staff: Ms. Susan King Pacific Gas and Electric Company Program Management: Mr. Bryan Cunningham

, , ESLO2023-004 . .

f'!! r PG&E

• DCPP-RWMP 2022 Annual Report 8-1

9.0 Literature Cited 9.0 Literature Cited Tenera Environmental, Inc. 1988. Diablo Canyon Power Plant, Final Report, Thermal Effects Monitoring Program, Volume 1. Pacific Gas and Electric Company, San Francisco, CA.

Tenera Environmental, Inc. 1997. Thermal effects monitoring program, analysis report: Chapter 1 Changes in the marine environment resulting from the Diablo Canyon Power Plant discharge. Pacific Gas and Electric Company, San Francisco, CA.

Tenera Environmental, Inc. 1999a. Receiving Water Monitoring Program-1995-1997 Progress Report. Pacific Gas and Electric Company, San Francisco, CA.

Tenera Environmental, Inc. 1999b. Receiving Water Monitoring Program- 1995-1998 Progress Report. Pacific Gas and Electric Company, San Francisco, CA.

Tenera Environmental, Inc. 2002. Diablo Canyon Power Plant, Receiving Water Monitoring Program - 1995-2002 Analysis Report. Pacific Gas and Electric Company, San Francisco, CA.

, , ESLO2023-004 W _P_G_&_E_*_D_C_P_P_-R_W_M_P_2_0_22_A_n_n_u_a_lR_e_p_o_rt_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _9--1

D!ab/o Canyon Power Plant

~ppendix A lr;itertidal Temperatures

" ' ESL02023-004 f4ilr PG&E

• D9PP-RWMP 2022 Annual Report A-0

Appendix A- Intertidal Temperatures Table Al. Monthly stat1stical summary of intertidal temperatures (0 C), January-December 2022, North Control Station NC 2 +0.6m (2+2).

• 1,' ' ' '* * ;c , /' :* ,'

Month Ma~t Min Mean Std.:Dt:iv. N ,*

Station: NC 2 +0.6m Jan 14.23 11.81 12.91 0,38 1233 Feb 14.28 10.41 12.61 0,94 1071 Mar 13.51 10.38 11.58 0.62 1147 Apr 13,61 9.33 10.86 0.75 1091 May 14.41 9.29 11.15 1.15 1155 Jun 16.10 10.63 13.04 1.19 1196 Jul 15.72 11,65 13.91 0.81 1293 Aug 16.48 11.79 14.20 0,98 1302 Sep 18.06 12.27 14.97 1.16 1264 Oct 15.67 11.86 13.91 0.86 1314 Nov 13.30 11.23 12.15 0.43 1244 Dec 15.13 12.58 13.43 0.49 1241 f\ lcSLO2023-004 A-1

Appendix A- Intertidal Temperatures Table A2. Monthly statistical summary of intertidal temperatures (0 C), January-December 2022, Field's Cove Stations FC 1 +0.6m ( 4+2), FC 2 +0.6m (5+2) and FC 3

+0.6m (6+2).

Month Max Min Mean Std. Dev N Station: FC 1 +0.6m Jan 15.65 12.68 14.09 0.55 1502 Feb 16.48 11.16 13.88 1.09 1279 Mar 15.23 10.50 12.49 0.95 1343 Apr 14.04 9.36 11.31 1.00 1270 May 17.32 9.53 12.21 1.62 1351 Jun 18.29 11.30 14.53 1.67 1379 Jul 19.73 12.83 15.71 1.31 1515 Aug 19.44 12.71 15.88 1.30 1501 Sep 19.71 13.30 16.43 1.24 1433 Oct 17.28 12.74 15.09 1.03 1460 Nov 14.92 11.60 13.06 0.65 1397 Dec 16.84 13.07 14.66 0.69 1444 Station: FC 2 +0.6m Jan 15.71 12.72 14.15 0.54 1233 Feb 16.49 11.27 13.89 1.06 1071 Mar 15.27 10.53 12.44 0.91 1147 Apr 13.81 9.44 11.23 0.93 1091 May 17.10 9.57 12.06 1.55 1155 Jun 18.10 11.31 14.43 1.61 1196 Jul 18.83 12.88 15.56 1.21 1293 Aug 19.94 12.70 15.72 1.22 1302 Sep 19.72 13.35 16.37 1.18 1264 Oct 17.20 12.75 15.08 1.00 1314 Nov 14.91 11.81 13.09 0.64 1244 Dec 16.57 13.17 14.70 0.70 1241 Station: FC 3 +0.6m Jan 15.73 12.68 14.12 0.54 1233 Feb 16.57 11.36 13.89 1.05 1071 Mar 15.35 10.55 12.44 0.89 1147 Apr 13.69 9.47 11.22 0.90 1091 May 16.92 9.59 12.01 1.50 1155 Jun 17.76 11.33 14.30 1.54 1196 Jul 18.55 12.73 15.35 1.18 1293 Aug 19.17 12.56 15.52 1.19 1302 Sep 19.65 13.25 16.21 1.17 1264 Oct 17.07 12.75 14.97 0.95 1314 Nov 15.03 11.81 13.09 0.63 1244 Dec 16.62 13.14 14.68 0.70 1241

~ ESLO2023-004 A-2

Appendix A- Intertidal Temperatures Table A3. Monthly statistical summary of intertidal temperatures ( C), January-December 2022, North Diablo 0

Cove Stations NDC 1 +0.6m (7+2), NDC 2 +0.6m (8+2) and NDC3 +0.6m (9+2).

Month Max Min Mean Std. Dev N.

Station: NOC 1 +0.6m Jan 20.37 12.60 16.68 1.27 1502 Feb 21.08 13.00 16.60 1.44 1279 Mar 18.40 10.59 14.41 1.58 1343 Apr 17.62 9.72 12.43 1.83 1270 May 20.28 9.59 14.16 2.17 1351 Jun 21.77 11.82 16.88 1.99 1379 Jul 23.19 15.35 18.41 1.38 1515 Aug 22.37 14.28 18.68 1.42 1501 Sep 23.87 16.21 19.57 1.40 1433 Oct 21.77 13.19 17.66 1.36 1460 Nov 19.93 12.23 15.81 1.15 1397 Dec 21.73 13.00 17.34 1.59 1444 Station: NOC 2 +0.6m Jan 20.38 12.58 16.74 1.26 1178 Feb 20.88 13.12 16.65 1.44 1040 Mar 18.69 10.66 14.56 1.59 1115 Apr 18.01 9.85 12.68 1.92 1059 May 20.20 9.60 14.41 2.29 1114 Jun 21.82 12.09 17.18 2.04 1153 Jul 23.45 15.68 18.61 1.34 1255 Aug 22.66 14.45 18.83 1.43 1257 Sep 23.27 16.46 19.83 1.35 1231 Oct 21.58 13.97 17.99 1.31 1281 Nov 19.82 12.65 16.08 1.11 1215 Dec 21.38 13.04 17.43 1.58 1206 Station: NOC 3 +0.6m Jan 20.97 12.60 16.90 1.38 1512 Feb 21.43 13.19 16.88 1.51 1291 Mar 19.83 10.66 14.79 1.68 1350 Apr 18.82 9.89 12.83 1.99 1278 May 20.22 9.61 14.54 2.24 1370 Jun 21.80 11.96 17.24 2.01 1392 Jul 23.42 15.68 18.60 1.28 1528 Aug 22.49 , 14.21 18.77 1.40 1518 Sep 23.89 16.42 19.71 1.41 1448 Oct 21.90 13.42 17.94 1.34 1474 Nov 20.23 12.68 . 16.16 1.20 1409 Dec 22.00 13.03 17.67 1.65 1455 C' ESLO2023-004 A-3

Appendix A- Intertidal Temperatures Table A4. Monthly statistical summary of intertidal temperatures (0 C), January-December 2022, South Diablo Cove Stations SDC 1 +0.6m (10+2), SDC 2 +0.6m (11+2) and SDC 3 +0.6m (12+2).

Month Max Min Mean Std. Dev N Station: SOC 1 +0.6rn Jan 23.44 14.01 17.09 2.44 1519 Feb 23.31 12.31 16.94 2.22 1300 Mar 22.37 12.47 16.15 2.25 1361 Apr 21.86 11.88 16.13 2.28 1290 May 22.80 11.41 15.72 2.39 1380 Jun 22.24 12.15 16.75 2.16 1405 Jul 24.45 13.63 17.34 1.76 1536 Aug 21.84 13.47 16.89 1.49 1531 Sep 23.16 14.17 17.45 1.66 1457 Oct 24.06 13.62 17.15 1.89 1483 Nov 21.82 12.15 14.99 2.03 1424 Dec 24.26 14.31 17.14 2.02 1469 Station: SOC 2 +0.6rn Jan 21.64 14.01 16.33 1.32 1233 Feb 21.97 12.57 16.45 1.61 1071 Mar 20.73 12.65 15.68 1.76 1147 Apr 21.62 11.19 15.27 1.98 1091 May 22.54 11.43 15.61 2.23 1155 Jun 22.08 12.26 17.14 2.15 1196 Jul 24.22 14.48 17.78 1.68 1293 Aug 21.84 13.65 17.22 1.51 1302 Sep 22.91 14.19 17.63 1.58 1264 Oct 24.14 13.98 17.22 1.69 1314 Nov 20.88 12.18 14.77 1.73 1244 Dec 21.85 14.36 16.55 1.18 1241 Station: SOC 3 +0.6rn Jan 18.67 13.61 15.92 0.88 1395 Feb 18.98 12.14 15.88 1.15 1191 Mar 17.79 12.30 14.68 1.09 1255 Apr 18.96 10.67 13.93 1.41 1195 May 20.36 11.26 14.43 1.69 1265 Jun 20.29 12.19 15.95 1.64 1306 Jul 22.56 14.35 16.77 1.33 1429 Aug 20.64 13.60 16.61 1.27 1411 Sep 21.94 14.23 17.16 1.38 1354 Oct 21.38 14.20 16.72 1.37 1397 Nov 18.06 12.15 14.55 1.40 1338 Dec 19.36 14.29 16.28 0.82 1358 C' ESLO2023-004 A-4

I Appendix A- Intertidal Temperatures Table AS. Monthly statistical summary of intertidal temperatures (°C), January-December 2022, South Diablo Point Stations SDP 1 +0.6m (22+2) and SDP 2 +0.6m (14+2).

Month Max Min Mean Std. Dev N Station: SDP 1 +0.6m Jan 18.70 13.43 15.94 0.87 1557 Feb 19.01 12.49 15.98 1.16 1340 Mar 17.55 12.24 14.67 1.08 1398 Apr 18.64 10.65 13.85 1.39 1329 May 19.50 11.27 14.33 1.66 1413 Jun 20.26 12.23 15.80 1.59 1438 Jul 22.11 13.88 16.55 1.37 1570 Aug 20.60 13.50 16.50 1.39 1579 Sep 22.51 14.16 17.08 1.45 1486 Oct 21.80 14.18 16.75 1.42 1509 Nov 18.76 12.42 14.54 1.41 1449 Dec 19.88 14.18 16.27 0.85 1506 Station: SDP 2 +0.6m Jan 16.77 12.87 14.96 0.61 1502 Feb 17.15 11.91 14.64 0.95 1279 Mar 16.25 11.00 13.63 0.93 1343 Apr 15.32 10.02 12.22 0.95 1270 May 17.93 10.41 13.09 1.30 1351 Jun 18.71 10.71 14.44 1.40 1379 Jul 17.95 11.34 14.89 1.32 1515 Aug 18.78 11.92 15.14 1.15 1501 Sep 20.20 12.99 15.83 1.30 1433 Oct 19.45 12.65 15.08 1.02 1307 Nov ** ** ** ** **

Dec ** ** ** ** **

• • Data were not recoverable from October 28 at 5:20 PM PST through the remainder of the calendar year due to a temperature unit malfunction.

C' ESLO2023-004. A-5

Appendix A- Intertidal Temperatures Table A6. Monthly statistical summary of intertidal temperatures (0 C), January-December 2022, South Control Stations SC 1 +0.6m (19+2) and SC 1V +0.6m.

Month Max Min Mean Sid. Dev N Station: SC 1 +0.6m Jan 13.58 12.28 12.90 0.24 1371 Feb 13.82 10.88 12.53 0.78 1180 Mar 12.77 10.20 11.35 0.58 1234 Apr 12.44 9.28 10.41 0.66 1180 May 14.14 9.09 10.75 1.17 1250 Jun 15.38 10.43 12.55 1.16 1287 Jul 15.67 11.21 13.16 0.77 1408 Aug 15.23 11.46 13.39 0.81 1398 Sep 17.48 12.20 14.50 1.02 1340 Oct 14.99 11.94 13.62 0.66 1382 Nov 13.26 11.20 12.11 0.41 1327 Dec 14.30 12.67 13.30 0.34 1345 Station: SC 1V+0.6m Jan 14.48 11.42 12.84 0.49 1617 Feb 14.80 10.28 12.68 0.98 1435 Mar 15.45 10.18 11.93 0.91 1491 Apr 16.13 8.79 11.45 1.27 1410 May 17.97 9.12 12.33 1.80 1492 Jun 18.94 10.78 14.55 1.82 1508 Jul 19.06 12.82 15.43 1.36 1641 Aug 18.72 12.92 15.65 1.18 1666 Sep 19.42 13.74 16.10 1.04 1569 Oct 16.91 12.64 14.57 0.85 1582 Nov 14.52 11.04 12.30 0.69 1520 Dec 14.28 11.78 13.08 0.46 1585 c, ESLO2023-004 A-6

Diablo Canyon Power Plant Appendix B Subtidal Temperatures

, , ESLO2023-004 W PG&E

• DCPP-RWMP 2022 Annual Report

Appendix B - Subtidal Temperatures Table Bl. Monthly statistical summary of subtidal temperatures ( C), January-December 2022, North Control 0

Station NC 1 -3m (1-10).

Month Max Min Mean Std. Dev N Station: NC 1 -3m Jan 14.07 11.99 12.99 0.38 2232 Feb 14.74 10.77 12.73 0.88 2016 Mar 13.39 10.23 11.52 0.64 2232 Apr 12.95 9.38 10.71 0.66 2160 May 14.53 9.21 10.84 1.19 2232 Jun 15.46 10.30 12.41 1.13 2159 Jul 15.10 11.37 13.21 0.66 2232 Aug 15.56 11.40 13.55 0.94 2232 Sep 18.01 12.03 14.79 1.19 2159 Oct 15.42 11.82 13.82 0.80 2232 Nov 13.22 11.43 12.23 0.38 2160 Dec 15.23 12.53 13.57 0.49 2232 Table B2. Monthly statistical summary of subtidal temperatures ( C), January-December 2022, Field's Cove 0

Station FC 1 -3m (22-10).

Month Max Min Mean Std. Dev N Station: FC 1 -3m Jan 15.72 12.71 14.20 0.61 1980 Feb ** ** ** ** **

Mar ** ** ** ** **

Apr ** ** ** ** **

May ** ** ** ** **

Jun 16.93 13.77 15.23 0.79 616 Jul 16.93 11.92 14.61 0.85 2232 Aug 17.76 12.50 14.97 1.05 2232 Sep 19.54 13.35 16.22 1.15 2160 Oct 16.96 12.57 15.03 0.96 2231 Nov 15.44 12.02 13.19 0.61 2160 Dec 18.07 13.07 14.90 0.81 . 2232

• • Data were not recoverable from January 28 at 12:00PM PST through June 22 at I 0:20AM PST due to a temperature unit malfunction.

C' ESLO2023-004 B-1

Appendix B - Subtidal Temperatures Table B3. Monthly statistical summary of subtidal temperatures ( C), January-December 2022, North Diablo 0

Cove Stations NDC 2 -3m (8-10), NDC 3 -3m (9-10), and NDC 4 -4m (9-15) ..

Month Max Min Mean Std: Dev N Station: NOC 2 -3m Jan 21.72 12.61 17.24 1.60 2232 Feb 22.25 13.14 17.12 1.69 2015 Mar 20.07 10.69 14.88 1.83 2232 Apr 19.42 9.71 12.98 2.05 2160 May 20.37 9.60 14.66 2.20 2232 Jun 21.73 11.71 16.93 1.97 2159 Jul 23.46 13.45 17.75 1.74 2232 Aug 22.46 12.98 17.90 1.76 2232 Sep 24.66 14.84 19.08 1.70 2160 Oct 22.38 12.59 17.81 1.63 2231 Nov 21.09 12.34 16.33 1.52 2160 Dec 23.20 13.01 18.01 1.85 2232 Station: NOC 3 -3m Jan 22.40 12.63 17.57 1.76 2232 Feb 22.49 13.63 17.32 1.78 2015 Mar 20.80 10.72 15.14 1.93 2232 Apr 19.35 9.81 13.15 2.16 2160 May 20.72 9.60 14.94 2.26 2232 Jun 22.36 11.73 16.90 2.06 2159 Jul 23.63 12.99 17.43 2.05 2232 Aug 22.68 12.50 17.59 1.94 2232 Sep 24.87 14.60 18.82 1.94 2160 Oct 22.96 13.16 17.78 1.82 2231 Nov 21.42 12.12 16.47 1.80 2160 Dec 23.74 13.08 18.22 2.01 2232 Station: NOC 4 -4m Jan 21.69 12.63 17.05 1.66 2232 Feb 22.15 12.66 16.89 *1.70 2016 Mar 20.10 10.65 14.69 1.80 2232 Apr 18.77 9.72 12.44 1.87 2160 May 19.84 9.56 14.23 2.00 2232 Jun 21.32 10.76 15.71 1.96 2159 Jul 22.91 11.70 15.65 2.23 2232 Aug 21.84 11.85 15.78 1.99 2232 Sep 24.35 12.84 17.15 2.21 2160 Oct 21.96 12.15 16.47 1.88 2231 Nov 20.66 11.63 15.55 1.88 2160 Dec 23.66 13.04 17.50 1.97 2232 ft' ESLO2023-004 B-2

Appendix 8 - Subtidal Temperatures Table B4. Monthly statistical summary of subtidal temperatures (0 C), January-December 2022, South Diablo Cove Stations SDC l -3m (11-10) and SDC 4 -4m (11-15).

Month. Max Min Mean Std. Oev N Station: SDC 1 -3m Jan 23.21 12.91 16.21 2.00 2231 Feb 22.56 11.65 16.07 2.15 2016 Mar 22.40 11.01 15.23 1.96 2231 Apr 19.60 9.48 14.22 2.05 2160 May 21.72 9.40 14.57 2.19 2232 Jun 21.92 10.94 15.18 2.06 2160 Jul 22.83 11.62 15.30 2.03 2230 Aug 20.59 11.83 15.10 1.62 2232 Sep 22.77 12.25 16.13 1.83 2160 Oct 22.50 11.73 15.74 1.79 2232 Nov 21,95 11.27 14.33 1.72 2159 Dec 23.12 13.26 16.30 1.89 2232 Station: SDC 4 -4m Jan 22.30 12.19 14.90 2.02 2231 Feb 21.84 11.20 14.30 1.96 2016 Mar 20.70 10.39 13.66 1.95 2231 Apr 19.14 9.20 12.67 1.80 2160 May 19.03 9.17 12.56 2.02 2232 Jun 19.50 10.45 12.70 1.41 2160 Jul 18.43 10.81 13.04 1.26 2233 Aug 16.47 10.99 13.08 1.00 2232 Sep 20.18 11.42 14.18 1.35 2160 Oct 18.66 11.65 14.07 1.29 2232 Nov 19.02 11.05 13.56 1.35 2159 Dec 22.01 12,78 15.09 1.77 2232

~ ESLO2023-004 8-3

, Appem;lix B - Subtidal Temperatures Table B5. Monthly statistical summary of subtidal temperatures (°C), January-December 2022, South Control Stations SC 1 -3m (19-10) and SC 2 -6m (20-20).

Month *Max,: Min Mean, Sfct.: b;v *N Station: SC 1 -3m Jan 13.90 12.22 12.92 0.28 2232 Feb 14.30 10.92 12.58 0.76 2015 Mar 12.75 10.17 11.38 0.63 2232 Apr 12.65 9.28 10.45 0.71 2160 May 14.30 9.03 10.67 1.25 2232 Jun 15.03 10.25 12.25 1.17 2160 Jul 14.59 10.88 12.77 0.65 2232 Aug 15.45 11.31 13.13 0.84 2232 Sep 17.53 11.98 14.43 0.99 2160 Oct 15.06 11.94 13.66 0.63 2232 Nov 13.31 11.30 12.15 0.40 2160 Dec 14.38 12.73 13.36 0.32 2232 Station: SC 2 -6m Jan 13.71 12.15 12.92 0.23 2232 Feb 13.85 11.03 12.53 0.71 2015 Mar 12.63 9.94 11.25 0.61 2232 Apr 12.12 9.12 10.28 0.65 2160 May 14.07 9.06 10.40 1.17 2232 Jun 14.67 10.17 11.85 1.10 2159 Jul 14.13 10.37 12.31 0.68 2232 Aug 15.13 11.06 12.70 0.88 2232 Sep 17.41 11.58 14.05 0.98 2160 Oct 14.73 11.92 13.48 0.63 2232 Nov 13.38 11.16 12.14 0.40 2159 Dec 14.36 12.75 13.39 0.32 2232 C~1 ESLO2023-004 B-4

Diab/o Canyon Power Plant AppendixC Intertidal Algae, Invertebrates and Substrates (HBT Method)

, , ESLO2023-004 fl r PG&E

• DCPP-RWMP 2022 Annual Report A-0

Appendix C- Intertidal Algae, Invertebrates and Substrates Table CL Inter.tidal algae, sessile invertebrates, and substrates (percent cover) and motile invertebrates (abundance per 1.0 m2) survey means, standard deviations and 2022 annual means for North Control Station NC 1+0.3m (l+ 1).

survey* t*

• 208 . .* 209 .

• 210; ,. 2U /4

'd*

F

• Su,rv!lY_ Date , 19;;.J~n:.~2 02-Junii2 *

• 08-Sep,22 ofi,oeb~22 Mmi.ak .Annual*

~1 "

Taxon ,_, ,. ,. . Mean,. 'Mean , Meart * . M~~ri\*, *. M~an; '

Sta; Qev.

Algae Cover Phy/lospadix spp. 24.7 19.1 27.8 35.1 26.65 6.66 Mazzael/a f/accida 9.5 33.2 30.8 19.0 23.13 11.01 non-coralline crust 28.8 16.4 16.2 *16.7 19.50 6.17 Mazzae/la affinis 5.5 21.3 14.7 15.9 14.36 6.57 Gastroclonium subarticulatum 6.3 8.2 6.3 6.9 6.91 0.92 coralline crust 6.7 4.1 7.2 5.4 '5.83 1.37 Gelidium coulteri 4.7 5.5 2.9 6.3 4.86 1.45 Mastocarpus papillatus 4.0 9.2 5.4 0.4 4.76 3.62 Smifhora naiadum - <0.1 12.1 <0.1 3.04 6.03 juv. articulated coralline algae 4,4 1.3 3.0 1.0 2.42 1.62 Chondracanthus canalicu/atus 1.1 2.2 1.9 2.4 1.89 0.56 Mastocarpus jardinii 0.8 0.9 0.6 4.9 1.81 2.04 Cryptop/eura vio/acea 0.6 0,4 2.9 2.4 1.57 1.26 Codium setchellii 3.3 1.1 0.3 1.5 1.55 1.24 Endocladia muricata 0.6 1.4 1.7 0.2 0.99 0.70 Mazzael/a splendens - 3.2 - 0.80 1.60 Corallina vancouveriensis 1.1 0.6 0.6 0.7 0.73 0.26 Mazzael/a /eptorhynchos 0.2 1.4 0,5 <0.1 0.54 0.59 Prionitis spp. 1.0 0.4 0.1 0,5 0.51 0.35 Microc/adia coulteri - - 1.5 0.3 0.45 0.73 Ulvaspp. - - 0.6 0.6 0.32 0.36 Pferosiphonia dendroidea 0.8 <0.1 - 0.2 0.28 0.38 filamentous red algae complex 0,3 0.6 - 0.23 0.30 Sarcodiotheca gaudichaudii 0.2 0.1 0.1 0.2 0.18 0.04 Mazzael/a oregona <0.1 <0,1 0.4 - <0.1 0.12 0.20 Ca/liarthron!Bossie//a spp. -complex <0.1 <0.1 <0.1 0.1 0.07 0.06 Gelid/um pusillum <0.1 <0.1 <0.1 0.1 0.04 0.07 Melobesia mediocris 0.1 - <0.1 <0,1 0.04 0.07 Cryptopleura ruprechtiana - 0.1 <0.1 0.03 0.07 Porphyra spp. . 0.1 " 0.03 0.07 C/adophora spp. <0.1 <0.1 <0.1 <0.1 0.02 0.03 Osmundea spp. <0,1 <0.1 <0.1 <0.1 0.02 0.03 Nienburgia andersoniana <0.1 - - 0.02 0.03 Crypfosiphonia woodii - . <0.1 <0.1 <0.01 <0.01 Grateloupia californica <0.1 <0.1 - <0.1 <0.01 <0.01 Callithamnion pikeanum <0.1 - - <0.1 <0.01 <0.01 Chondria decipiens <0.1 <0.1 . <0.1 <0.01 <0,01 Farlowia/Pikea spp.-complex <0.1 - . <0.01 <0.01 Chlorophyta (filamentous) - <0,1 . <0.01 <0.01 Cora/Jina chilensis <0.1 - - - <0.01 <0.01 Egregia menziesii - - - <0.1 <0.01 <0.01 Rhodoptilum plumosum <0.1 - - . <0.01 <0.01 Rhodymenia spp. <0.1 - <0.01 <0.01 Invertebrate Counts Ch/orostoma funebralis 128.2 64,2 54.4 68.6 78.85 33.43 J

Paaurus soo. 4.6 1.4 9.4 10.2 6.40 4.15 (table continued)

C' ESLO2023-004 C-1

Appendix C - Intertidal Algae, Invertebrates and Substrates Table Cl (continued). Intertidal algae, sessile invertebrates, and substrates (percent cover) and motile invertebrates (abundance per 1.0 m2) survey means, standard deviations and 2022 annual means for North Control Station NC 1+0.3m (1+1).

Survey 208 209 210 211 Survey Date 19-Jan-22 02-Jun-22 08-Sep-22 06-Dec-22 Annual Annual Taxon Mean Mean Mean Mean Mean Std. Dev.

Invertebrate Counts (continued)

Anthopleura e/egantissima 1.4 0.8 0.2 0.8 0.80 0.49 Lottiidae 0.2 - 1.0 0.8 0.50 0.48 Leptasterias spp. 0.6 0.4 0.6 0.2 0.45 0.19 Lacuna spp. 0.4 - 0.4 0.6 0.35 0.25 Lottia limatula 0.2 0.8 0.2 - 0.30 0.35 Pachygrapsus crassipes 0.6 0.2 0.4 - 0.30 0.26 Pugettia spp. 0.2 - 0.6 0.4 0.30 0.26 Lirobittium spp. 0.4 - 0.2 0.4 0.25 0.19 Crepidu/a spp. - 0.2 0.2 0.4 0.20 0.16 Fissure/la volcano 0.6 - 0.2 - 0.20 0.28 Lottia pelta - - 0.4 0.2 0.15 0.19 Mopa/iaspp. - - 0.4 0.2 0.15 0.19 Nemertea - 0.2 0.2 0.2 0.15 0.10 Sipuncula 0.2 - - 0.4 0.15 0.19 Nereididae - - 0.6 - 0.15 0.30 Serpulidae - - - 0.6 0.15 0.30 Alia spp. - - 0.2 0.2 0.10 0.12 lschnochitonidae - - 0.2 0.2 0.10 0.12 Lottia scabra - 0.2 0.2 - 0.10 0.12 Ocinebrina spp. 0.2 - - 0.2 0.10 0.12 Roma/eon antennarius - - 0.4 - 0.10 0.20 Anthozoa 0.2 - - - 0.05 0.10 Grapsidae - 0.2 - - 0.05 0.10 Hemigrapsus nudus - - 0.2 - 0.05 0.10 Heptacarpus spp. 0.2 - - - *0.05 0.10 Homolopoma luridum!Lirularia succincta 0.2 - - - 0.05 0.10 Lottia scutum - - 0.2 - 0.05 0.10 Petro/is/hes spp. 0.2 - - - 0.05 0.10 Pseudomelatoma torosa - - - 0.2 0.05 0.10 Pieropurpura festiva - 0.2 - - 0.05 0.10 Strongy/ocentrotus purpuratus 0.2 - - - 0.05 0.10 Invertebrate Coverage Pis/a spp. 9.0 2.7 6.5 10.6 7.17 3.42 tunicates, compound/social <0.1 <0.1 0.4 <0.1 0.11 0.16 Spirorbidae <0.1 <0.1 <0.1 <0.1 0.01 <0.01 Bryozoa (encrusting) <0.1 - <0.1 <0.1 <0.01 <0.01 Porifera (encrusting) <0.1 <0.1 <0.1 <0.1 <0.01 <0.01 Phragmatopoma californica <0.1 <0.1 <0.1 <0.1 <0.01 <0.01 Salmacina tribranchiata - - <0.1 <0.1 <0.01 <0.01 Chthamalus fissus <0.1 <0.1 <0.1 - <0.01 <0.01 Ha/iclona spp. - - <0.1 <0.1 <0.01 <0.01 Substrate Cover rock 3.5 8.2 5.6 3.5 5.21 2.23 sand (shell gravel) 7.5 1.4 4.8 1.7 3.84 2.89 cobble 0.1 2.2 1.4 0.7 1.10 0.87 C' ESLO2023-004 C-2

Appendix C - Intertidal Algae, Invertebrates and Substrates Table C2. Intertidal algae, sessile invertebrates, and substrates (percent cover) and motile invertebrates (abundance per 1.0 m 2) survey means, standard deviations and 2022 annual means for North Control Station NC 1+0.9m (1+3).

210' ..

Survey '208 . 209 21"1 Survey Date 19-Jan-22 02-Jun-22 08-Sep:22 05-Dec-22 Annual Annual Taxon Mean Mean Mean Mean M_ean Std. Dev.

Algae Cover Endoc/adia muricata 24.4 33.9 30.3 22.9 27.90 5.12 non-coralline crust 33.4 26.0 14.4 27.8 25.43 7.97 Mazzael/a f/accida 7.6 5.0 19.0 12.0 10.90 6.10 Masfocarpus papillatus 7.2 4.8 10.6 14.1 9.15 4.06 coralline crust 5.6 5.5 9.9 6.1 6.77 2.12 juv. articulated coralline algae 1.3 2.2 3.4 1.2 2.00 1.04 Codium setchel/ii 2.3 <0.1 1.6 1.9 1.46 0.97 Corallina vancouveriensis 1.4 0.4 0.6 2.9 1.32 1.15 Gelidium coulteri <0.1 0.9 0.6 1.7 0.80 0.73 Mastocarpus jardinii <0.1 0.6 1.7 0.7 0.77 0.66 Phyllospadix spp. 0.4 0.6 0.3 0.8 0.56 0.22 Mazzaella affinis 0.6 0.7 <0.1 0.8 0.52 0.36 Silvetia compressa 0.6 0.2 0.5 0.2 0.38 0.21 Codium fragile subsp. californicum - 1.4 - <0.1 0.36 0.68 Prionitis spp. 0.1 0.3 0.4 0.5 0.35 0.15 Egregia menziesii - - 1.3 - 0.33 0.66 Porphyra spp. - 0.6 0.7 - 0.31 0.37 Gastroc/onium subarticu/afum 0.1 <0.1 0.5 0.1 0.21 0.19 Analipus japonicus - <0.1 0.3 0.3 0.17 0.17 Ge/idium pusil/um <0.1 <0.1 <0.1 0.2 0.07 0.10 Chondracanthus canalicu/atus <0.1 0.1 <0.1 <0.1 0.06 0.06 Cal/iarthron!Bossiel/a spp.-complex <0.1 <0.1 <0.1 <0.1 0.05 0.03 Chrysophyta - <0.1 - - 0.02 0.04 Mazzael/a splendens - <0.1 - - 0.02 0.04 Cladophora spp. <0.1 <0.1 <0.1 <0.1 0.01 <0.01 U/vaspp. - <0.1 <0.1 <0.1 <0.01 <0.01 Mazzaella leptorhynchos <0.1 - <0.1 <0.1 <0.01 <0.01 Callithamnion pikeanum - - <0.1 <0.1 <0.01 <0.01 Corallina chilensis - - - <0.1 <0.01 <0.01 Cumagloia andersonii - - <0.1 - <0.01 <0.01 Mazzael/a oregona - - - <0.1 <0.01 <0.01 Melobesia mediocris - - <0.1 - <0.01 <0.01 Microcladia coulteri - - <0.1 - <0.01 <0.01 Smithora naiadum - - <0.1 - <0.01 <0.01 Invertebrate Counts Chlorostoma funebralis 60.2 128.6 81.6 44.2 78.65 36.66 Lottia scabra 11.6 10.8 23.2 24.0 17.40 7.17 Myti/usspp. 3.0 1.8 1.2 10.4 4.10 4.27 Pagurus spp. 5.0 3.4 0.8 3.4 3.15 1.74 Lottia pelta 0.2 0.4 4.4 2.0 1.75 1.94 Lottia /imatula 0.6 3.0 2.2 0.6 1.60 1.20 Nutfallina californica 0.4 1.4 0.8 1.6 1.05 - 0.55 Pol/icipes polymerus 0.6 1.2 0.6 1.8 1.05 0.57 Ocinebrina spp. 0.8 1.2 1.4 0.4 0.95 0.44 Mopa/iaspp. 1.0 0.2 1.4 0.6 0.80 0.52 Lottiidae 0.2 1.2 1.0 0.4 0.70 0.48 (table continued) t' ESLO2023-004 C-3

Appendix C - Intertidal Algae, Invertebrates and Substrates Table C2 (continued). Intertidal algae, sessile invertebrates, and substrates (percent cover) and motile invertebrates (abundance per 1.0 m2) survey means, standard deviations and 2022 annual means for North Control Station NC 1+0.9m (1 +3).

Survey 208 209 210 211 Survey Date 19-Jan-22 02.Juna22 08-Sep-22 05-Dec-22 Annual Annual Taxon Mean Mean Mean Mean Mean Std. Dev.

Invertebrate Counts (continued)

Pachygrapsus crassipes 0.2 0.8 0.6 0.2 0.45 0.30 Lottia scutum . - 1.2 0.6 0.45 0.57 Ba/anus spp. 0.6 0.8 - - 0.35 0.41 Lottia gigantea 0.6 0.2 0.2 0.2 0.30 0.20 Anthop/eura e/egantissima 0.6 - 0.2 0.2 0.25 0.25 Tetrac/ifa rubescens 0.4 0.2 - 0.4 0.25 0.19 Crepidu/a spp. - 0.2 0.4 0.2 0.20 0.16 Petrolisthes spp. 0.8 - - - 0.20 0.40 Leptasterias spp. 0.4 - 0.2 - 0.15 0.19 Cyanoplax spp. - - 0.6 - 0.15 0.30 Nemertea - - 0.6 - 0.15 0.30 Fissure/la volcano - - 0.2 0.2 0.10 0.12 Littorina spp. 0.2 0.2 - - 0.10 0.12 Lottia ochracea 0.2 - 0.2 - 0.10 0.12 lschnochitonidae - - 0.2 - 0.05 0.10 lsopoda - - 0.2 - 0.05 0.10 Lirobittium spp. 0.2 - - - 0.05 0.10 Pseudomelatoma torosa - - - 0.2 0.05 0.10 Serpulidae - 0.2 - - 0.05 0.10 Sipuncula - - - 0.2 0.05 0.10 Invertebrate Cover Phragmafopoma califomica <0.1 0.3 <0.1 <0.1 0.11 0.12 Chthamalus fissus <0.1 <0.1 <0.1 <0.1 0.01 <0.01 Spirorbidae <0.1 <0.1 <0.1 <0.1 <0.01 <0.01 Bryozoa (encrusting) <0.1 - - <0.1 <0.01 <0.01 Porifera (encrusting) - - - <0.1 <0.01 <0.01 Ha/iclona spp. - - - <0.1 <0.01 <0.01 Pista spp. <0.1 - - - <0.01 <0.01 Sa/macina tribranchiata - - - <0.1 <0.01 <0.01 tunicates, compound/social - - - <0.1 <0.01 <0.01 Substrate Cover rock 23.8 24.1 27.4 23.0 24.58 1.96 cobble 1.3 2.2 2.1 2.2 1.91 0.44 sand (shell gravel) 1.0 <0.1 <0.1 0.6 0.42 0.51 t' ESL02023-004 C-4

Appendix'C - Intertidal Algae, Invertebrates and Substrates Table C3. Intertidal algae, sessile invertebrates, and substrates (percent cover) and motile invertebrates (abundance per 1.0 m2) survey means, standard deviations and 2022 annual means for North Control Station NC 2+0.3m (2+1).

Survey 208 '209 21,0 211 *.*

Survey Date 25-Feb-22 14.Jun-22 09-Sep-22 06-Dec-22 Annual Annual Taxon Mean Mean Mean Mean Mean Std. Dev.

Algae Cover non-coralline crust 28.7 15.1 31.1 24.0 24.72 7.05 Mazzae//a f/accida 20.1 33.6 18.4 14.9 21.75 8.19 Phy//ospadix spp. 16.0 8.7 18.4 18.1 15.31 4.54 Gastroc/onium subarticu/alum 11.5 5.7 10.4 14.6 10.56 3.69 Mastocarpus papillatus 4.4 16.0 7.5 10.2 9.53 4.90 Mazzael/a affinis 7.8 14.9 6.7 6.6 8.99 3,95 coralline crust 3.4 2.5 7.3 5.5 4.67 2.15 Smithora naiadum <0.1 0.9 9.6 <0.1 2.64 4.65 Chondracanthus canalicu/atus 1.9 0.6 2.6 2.8 1.98 0.99 Mastocarpus jardinii 1.4 1.7 2.2 2.2 1.86 0.37 Mazzaella oregona 0.1 6.5 0.5 0,3 1.84 3.08

. juv. articulated coralline algae 1.3 1.7 1.7 1.7 1.62 0.20 Codium setche/lii 2.4 1.1 0.7 1.7 1.48 0.75 Ge/idium cou/teri 1.8 1.0 0.6 2.4 1.46 0.81 Cora/lina vancouveriensis 1.1 0,4 1.3 2.6 1.37 0.93 Prionitis spp. 1.5 2.9 <0.1 0.7 1.30 1.23 Porphyra spp. - 3.2 <0.1 - 0.80 1.60 Microc/adia coulteri <0.1 - 2.5 <0.1 0.63 1.25 Ca/liarthron!Bossie//a spp.-complex 0.5 0.2 0.4 1.2 0.56 0.43 Mazzae/la splendens - 1.7 0.3 <0.1 0.52 0.82 Mazzael/a /eptorhynchos 0.9 0.4 0.6 0.1 0.49 0.32 U/vaspp. - 0.7 0.5 0.30 0.35 Cryptop/eura violacea <0.1 0.1 0.3 0.8 0.30 0,33 Egregia menziesii 0.2 0.2 0.4 0.21 0.17 Neorhodomela /arix 0.4 . 0.3 0.1 0.21 0,18 Grateloupia ca/ifomica - <0.1 0.3 <0.1 0.09 0.17 filamentous red algae complex <0,1 0.3 - - 0.09 0.13 Sarcodiotheca gaudichaudii <0.1 <0.1 0.1 <0.1 0.05 0.07 Gelidium pusillum <0.1 - 0.2 0.05 0.10 Osmundea spp. 0.2 <0.1 - <0.1 0.05 0.10 C/adopbora spp. <0.1 <0.1 <0.1 0.1 0.04 0.07 Cryptop/eura ruprechtiana - - - 0.1 0.03 0.07 Endoc/adia muricata <0.1 - 0.1 0.03 0.07 Chlorophyta (filamentous) - <0.1 <0.1 - 0.02 0.04 Plerosiphonia dendroidea <0.1 <0.1 <0.1 0.02 0.03 Cal/ophyllis spp, <0.1 - - - 0.02 0.03 Melobesia mediocris <0, 1 - <0.1 <0.1 <0.01 <0,01 Chrysophyta - - <0.1 - <0.01 <0.01 Corallina chilensis - - <0.1 <0.01 <0.01 Neoptilota spp. - - <0.1 - <0.01 <0.01 Invertebrate Counts Ch/orostoma funebralis 89.8 63.2 18.6 55.8 56.85 29.38 Pagurus spp. 3.4 4.6 5.2 7.8 5.25 1.86 Lottia limatula 1.6 4.8 1.2 4.2 2.95 1.81 Lottia pe/ta 0.2 0.2 2.4 2.0 1.20 1.17 Anthop/eura e/egantissima 1.4 1.0 0.8 1.2 1.10 0.26 (table continued) t' ESL02023-004

Appendix C - Intertidal Algae, Invertebrates and Substrates Table C3 (continued). Intertidal algae, sessile invertebrates, and substrates (percent cover) and motile invertebrates (abundance per 1.0 m 2) survey means, standard deviations and 2022 annual means for North Control Station NC 2+0.3m (2+1).

Survey 208 209 210 211 Survey Date 25-Feb-22 14-Jun-22 09-Sep-22 06-Dec-22 Annual Annual Taxon Mean Mean Mean Mean Mean Std. Dev.

Invertebrate Counts (continued)

Lottiidae 0.8 0.6 0.8 1.2 0.85 0.25 Lottia scabra 0.2 3.0 - - 0.80 1.47 Epiactis prolifera 1.0 - 0.6 0.6 0.55 0.41 Tetraclita rubescens - - 2.0 - 0.50 1.00 Fissure/la volcano - - - 1.8 0.45 0.90 Pugetlia spp. 0.4 0.6 0.4 0.4 0.45 0.10 Nemertea 0.2 0.4 0.8 0.2 0.40 0.28 Pachygrapsus crassipes 0.4 0.6 0.4 - 0.35 0.25 Serpulidae 0.8 0.2 - 0.2 0.30 0.35 Leptasterias spp. - 0.2 0.4 0.6 0.30 0.26 Ocinebrina spp. 0.6 - - 0.6 0.30 0.35 lschnochitonidae - 0.4 0.6 - 0.25 0.30 Lirobittium spp. 0.8 - - - 0.20 0.40 Mopalia spp. 0.2 0.2 - 0.2 0.15 0.10 Acmaea mitra 0.2 - - 0.2 0.10 0.12 Ch/orostoma brunnea - - 0.4 - 0.10 0.20 Crepidu/a spp. - - 0.4 - 0.10 0.20 Homolopoma turidum!Lirularia succincta - - - 0.4 0.10 0.20 Lacuna spp. 0.2 - - 0.2 0.10 0.12 Lottia scutum - - 0.2 0.2 0.10 0.12 Cal/iostoma ligatum 0.2 - - - 0.05 0.10 Ca//ios/oma spp.

- - 0.2 - 0.05 0.10 Cyanoptax spp. - 0.2 - - 0.05 0.10 Epitonium!Opalia spp. - - 0.2 - 0.05 0.10 Ha/campa decemtentacutata - - - 0.2 0.05 0.10 Lissothuria nutriens - - 0.2 - 0.05 0.10 Roma/eon antennarius - ' - 0.2 - 0.05 0.10 Rostanga pu/chra - - - 0.2 0.05 0.10 Invertebrate Cover Pis/aspp. 4.1 2.6 2.2 5.6 3.61 1.54 tunicates, compound/social <0.1 <0.1 0.8 <0.1 0.21 0.42 Spirorbidae <0.1 <0.1 <0.1 <0.1 <0.01 <0.01 Porifera (encrusting) <0.1 <0.1 <0.1 <0.1 <0.01 <0.01 Bryozoa (encrusting) <0.1 - <0.1 <0.1 <0.01 <0.01 Phragmatopoma catifornica <0.1 <0.1 <0.1 <0.1 <0.01 <0.01 Chthamalus fissus <0.1 <0.1 - <0.1 <0.01 <0.01 Haliclona spp. - - - <0.1 <0.01 <0.01 Salmacina tribranchiata - - - <0.1 <0.01 <0.01 Substrate Cover rock 4.1 7.4 2.9 3.1 4.38 2.10 sand (shell gravel) 1.3 4.2 8.3 2.6 4.08 3.04 cobble 3.1 4.0 1.8 4.2 3.26 1.09 C-6

Appendix C - Intertidal Algae, Invertebrates and Substrates Table C4. Intertidal algae, sessile invertebrates, and substrates (percent cover) and motile invertebrates (abundance per 1.0 m2) survey means, standard deviations and 2022 annual means for North Control Station NC 2+0.9m (2+3).

Survey 208 :209 . 21p 211 '

Survey Date 25-Feb-22 14-Jun-22 09-Sep-22 05-Dec~22 Annual Annual Taxon Mean Mean Mean Mean Mean Std. Dev.

Algae Cover Endocladie muricata 34.7 42.0 35.6 30.2 35.62 4.86 non-coralline crust 38.5 28.0 24.0 37.4 31.98 7.10 Mastocarpus papillatus 4.6 8.2 14.2 15.4 10.61 . 5.11 Mazzael/a fleccida 0.1 2.8 11.8 2.9 4.41 5.09 coralline crust 3.3 1.4 2.5 3.8 2.75 1.05 Gorallina vancouveriensis 1.2 2.0 5.1 1.9 2.55 1.72 juv. articulated coralline algae <0.1 0.8 0.3 1.0 0.54 0.45 Mastocerpus jardinii <0.1 <0.1 0.8 1.1 0.52 0.53 Calliarthron!Bossiella spp.-complex 0.9 <0.1 <0.1 1.1 0.52 0.57 Gelidium coulteri <0.1 0.1 0.7 0.4 0.33 0.29 Prionitis spp. 0.3 <0.1 0.3 0.3 0.24 0.12 Porphyra spp. - 0.1 0.4 - 0.14 0.20 Mazzael/a effinis <0.1 <0.1 0.4 0.11 0.17 Mazzeel/a oregona - 0.1 0.2 0.09 0.11 Mazzae/la splendens - - - 0.3 0.07 0.14 Gastroc/onium subarticuletum - <0.1 - 0.2 0.05 0.10 Chondracanthus caneficufetus <0.1 <0.1 0.1 <0.1 0.04 0.07 Cladophora spp. <0.1 <0.1 <0.1 <0.1 0.01 <0.01 Gefidium pusil/um <0.1 <0.1 <0.1 <0.1 0.01 <0.01 Mazzaeffa leptorhynchos <0.1 <0.1 - <0.01 <0.01 Cryptopteura vio/acea <0.1 - <0.1 <0.1 <0.01 <0.01 Bryopsis spp. - - <0.1 <0.01 <0.01 Microcladie coulteri - - <0.1 - <0.01 <0.01 Phyllospadix spp. - - <0.1 . <0.01 <0.01 Viva spp. <0.1 . <0.01 <0.01 Invertebrate Counts Chlorostoma funebra/is 67.6 65.6 82.4 35.8 62.85 19.53 Lottie scabra 18.6 13.2 26.4 24.2 20.60 5.93 Anthop!eura elegantissime 6.6 5.6 5.6 9.4 6.80 1.80 Lottia limatula 1.8 2.6 4.0 1.6 2.50 1.09 Pegurus spp. - 0.6 6.6 2.2 2.35 2.98 Lottia scutum 1.4 - 3.4 4.2 2.25 1.91 Ocinebrina spp. 2.6 1.2 2.0 2.6 2.10 0.66 Lottia pelta 2.6 1.8 1.6 1.4 1.85 0.53 Lottiidae 1.6 0.6 1.0 1.2 1.10 0.42 Pachygrapsus crassipes 0.2 0.2 2.0 0.8 0.80 0.85 Mopelia spp. 0.8 0.4 0.6 1.0 0.70 0.26 Nemertea - - 1.4 0.2 0.40 0.67 Nuttallina califomica 0.6 - 0.4 0.25 0.30 Serpulidae - 0.4 0.4 0.20 0.23 Cyanoplax spp. 0.4 0.2 - 0.15 0.19 Littorina spp. 0.4 . 0.2 0.15 0.19 Lottie gigentea - 0.6 - - 0.15 0.30 Myti/usspp. - - 0.4 0.10 0.20 Crepidu/e spp. 0.2 - - 0.05 0.10 Grapsidae - 0.2 - 0.05 0.10 (table continued)

C-7

Appendix C Intertidal Algae, Invertebrates and Substrates Table C4 (continued). Intertidal algae, sessile invertebrates, and substrates (percent cover) and motile invertebrates (abundance per 1.0 m2) survey means, standard deviations and 2022 annual means for North Control Station NC 2+0.9m (2+3).

Survey .208 209 210 211 Survey Date

• 25oFeb-22 14.Jl!n-22 . 09-Sep-22 05'-Decs22 Anriu.al Annual Taxon Mean Mean Mea*n Mean Mean Std: Dev.

Invertebrate Counts (continued)

Lacunaspp. a - 0.2 - 0.05 0.10 Nuce//aspp. - - 0.2 0.05 0.10 Tetraclita rubescens 0.2 - - - 0.05 0.10 Invertebrate Cover Chthamalus fissus 0.2 0.1 0.2 0.4 0.23 0.09 Phragmatopoma califomica 0.3 - - 0.4 0.16 0.19 Haliclona spp. <0.1 0.2 0.05 0.10 Porifera (encrusting) 0.1 - <0.1 0.04 0.07 Spirorbidae <0.1 <0.1 <0.1 <0.1 0.01 <0.01 Bryozoa (encrusting) - - <0.1 <0.1 <0.01 <0.01 tunicates, compound/social - <0.1 <0.1 <0.01 <0.01 Substrate Cover rock 14.7 13.1 10.3 11.5 12.38 1.91 cobble 7.6 8.6 10.7 4.8 7.92 2.46 sand (shell gravel) <0.1 0.6 <0.1 0.4 0.25 0.30 ESLO2023-004 C-8

Appendix C Intertidal Algae, Invertebrates and Substrates Table CS. Intertidal algae, sessile invertebrates, and substrates (percent cover) and motile invertebrates (abundance per 1.0 m 2) survey means, standard deviations and 2022 annual means for Field's Cove Station FC 1+0.3m (4+ 1). . .

1, .r:'* ..* , ,;; .,'. '  :' * . *: :*suhiey :* ., .. 208'

.$1,1rye)'D~te 28-FeM2 * :2~Apr;:z2 20!l " *. *2f0:'

,01julL22 *.

l 2f0ct*f2'.

21f 1,

A!lriiiaF Annual Taxon ," ,.* ' ,' ;; , ,

Mean ' ' *Mea*n: *

• Mean : * ,. Mean' ; <Mean  :'

,:.std.Dev*..

Algae Cover non-coralline crust 42.4 26.4 24.0 33,1 31.44 8.23 Egregia menziesii 8.2 7.8 32.6 31.0 19.90 13.77 Corallina vancouveriensis 10.3 16.5 13.9 24.3 16.25 5.95 Phyl/ospadix spp. 4.2 6.3 7.8 10.3 7.12 2.57 juv. articulated coralline algae 9.5 7.8 6.1 1.6 6.25 3.40 Ge/idium coulteri 0.9 4.2 11.1 1.6 4.45 4.66 coralline crust 5.2 4.4 2.4 3.2 3.80 1,23 Chondracanthus canalicu/atus 1.0 2,6 3.8 1.8 2.29 1.21 Gastroc/onium subarticu/atum 0.3 1.1 3.1 1.9 1.62 1.18 Cryptopleura violacea 0.2 1.3 1.2 3.4 1.53 1.34 Cal/iarthron!Bossiella spp.-complex - 1.4 1.9 1.7 1.25 0.87 Prionitis spp. 0,3 1.0 0.8 1.3 0.84 0.38 Chrysophyta - 0.3 3,1 0.83 1.49 Mazzael/a affinis 0.4 <0.1 <0.1 2.2 0.65 1,03 Endocladia muricata 0.3 0.4 0.7 0,4 0.45 0.17 Mastocarpus papi/latus <0,1 0.5 0.6 <0.1 0.28 0,33 Corallina chilensis - - 0.3 0.6 0.23 0.27 filamentous red algae complex - <0.1 0.6 - 0.16 0.27 Colpomenia spp .. <0,1 <0.1 <0.1 0.6 0.16 0.31 U/vaspp. <0.1 <0.1 <0.1 0.5 0.14 0,24 Smithora naiadum <0.1 <0.1 <0.1 0.5 0.14 0.23 Osmundea spp. <0.1 <0.1 <0.1 0.4 0.12 0.16 Gelidium pusil/um 0.2 <0.1 <0.1 <0.1 0.09 0.09 Chlorophyta (filamentous) <0.1 <0,1 0.1 - 0.04 0.07 C/adophora spp. <0.1 <0,1 <0.1 - 0.02 0.04 Sarcodiotheca gaudichaudii - <0.1 <0.1 <0.1 0.02 0,03 Codium fragile subsp. californicum <0.1 - <0.1 <0.1 0.02 0.03 Endarachne/Petalonia spp.-complex - - <0.1 0.02 0.04 Pferosiphonia dendroidea <0.1 <0.1 0.02 0.03 Me/obesia mediocris <0,1 - <0.1 <0.1 <0.01 <0.01

• Chondracanthus corymbiferus - <0.1 <0.1 <0,1 <0.01 <0.01 Mazzael/a /eptorhynchos <0.1 <0,1 . <0.1 <0.01 <0,01 Rhodophyta Quv. blades) <0.1 - <0,1 <0.01 <0.01 C,

Cal/ophyllis spp. - <0.1 <0.01 <0.01 G/oiosiphonia califomica - <0.1 - - <0.01 <0.01 Laminariales - <0,1 <0.1 - <0.01 <0.01 Cryptop/eura ruprechtiana - <0.1 - <0.01 <0,01 Halymenia!Schizymenia spp.-complex - <0,1 - - <0.01 <0,01 Mazzael/a flaccida <0.1 - - <0.01 <0,01 Phaeophyta - - <0.1 - <0.01 <0.01 Scytosiphon spp. - <0.1 <0.01 <0.01 Invertebrate Counts Chlorostoma funebralis 52.4 116,2 13.4 2.8 46.20 51.31 Lottia scabra 34.0 18.6 39.0 66.2 39.45 19.83 Strongy/ocentrotus purpuratus 6.0 7.8 28.4 7.4 . 12.40 10.69 Lottia limatula 3.2 2,2 24.0 10.4 9.95 10.05 (table continued)

C' ESLO2023-004 C-9

Appendix C Intertidal Algae, Invertebrates and Substrates Table CS (continued). Intertidal algae, sessile invertebrates, and substrates (percent *cover) and motile invertebrates (abundance per 1.0 m2) survey means, standard deviations and 2022 annual means for Field's Cove Station PC 1+0.3m (4+ 1).

Survey 208 209 210 211 Survey Date 28-Feb-22 25-Apr-22 01.Jul-22 26-0ct~22 Annual Annual Taxon Mean Mean Mean Mean . Mean Std. Dev.

Invertebrate Counts (continued)

Tetraclita rubescens 15.4 9.0 6.8 6.2 9.35 4.21 Lottia pelta 4.8 3.4 4.8 10.0 5.75 2.91 Anthopleura elegantissima 4.6 6.4 2.8 8.4 5.55 2.40 Lottiascutum 11.2 4.2 3.6 4.75 4.68 Nuttallina califomica 5.2 1.8 4.2 4.2 3.85 1.45 Myti/us spp. 5.0 4.2 3.8 0.4 3.35 2.03 Lottia gigantea 3,6 1.8 0.8 1.55 1.55 Fissure/la volcano 3.6 0.6 0.8 0.8 1.45 1.44 Pagurus spp. 0.4 1.4 1.8 1.0 1.15 0.60 Lottiidae 0.4 2.0 0.6 1.0 1.00 0.71 Serpulidae 0.6 1.6 0.8 0.4 0.85 0.53 Pachygrapsus crassipes 0.2 0.4 2.2 0.2 0.75 0.97 Serpulorbis squamigerus 0.8 0.6 1.4 0.2 0.75 0.50 Ocinebrina spp. 0.4 0.8 0.4 1.0 0.65 0.30 Mopalia spp. 0.4 0,6 0.6 0.8 0.60 0.16 Ch/orostoma brunnea 1.6 - 0.4 0.50 0.76 Leptasterias spp. 0.2 0.6 0.6 0.35 0.30 Acmaea mitra 0.4 0.2 0.2 0.4 0.30 0.12 Nemertea 0.2 - 0.8 0.2 0.30 0.35 Ba/anus spp. - 0.4 0.10 0.20 Lacunaspp. - - - 0.4 0.10 0.20 Lottia insessa 0.2 - - 0.2 0.10 0.12 Nereididae - 0.2 0.2 0.10 0.12 Sipuncula - - 0.2 0.2 0.10 0.12 Tonicella lineata - 0.2 0.2 - 0.10 0.12 Anthop/eura xanthogrammica - 0.2 0.05 0.10 Epitonium/Opalia spp. - - 0.2 - 0.05 0.10 Heptacarpus spp. - - - 0.2 0.05 0.10 lschnochitonidae - 0.2 - 0.05 0.10 Pododesmus cepio - - - 0.2 0.05 0.10 Pseudochama spp. - - 0.2 0.05 0.10 Pseudome/afoma torosa 0.2 - - 0.05 0.10 Pugettia spp. - - 0.2 0.05 0.10 Invertebrate Cover Pistaspp. <0.1 1.0 0.8 1.5 0.85 0.63 Phragmatopoma californica 1.0 <0.1 0.8 0,3 0.53 0.47 Dodecaceria fewkesi - <0.1 <0.1 - 0.02 0.03 Chthamalus fissus <0.1 <0.1 <0.1 <0,1 0.01 <0.01 Spirorbidae - <0.1 <0.1 <0.1 <0.01 <0.01 tunicates, compound/social <0.1 <0.1 <0.1 <0.1 <0.01 <0.01 Porifera (encrusting) - <0.1 <0.1 <0.1 <0.01 <0,01 Salmacina tribranchiata - <0.1 - - <0.01 <0.01 Bryozoa (encrusting) - - <0.1 <0.01 <0.01 (fable continued)

C' ESLO2023-004 C-10

AppendixC Intertidal Algae, Invertebrates and Substrates Table CS (continued). Intertidal algae, sessile invertebrates, and substrates (percent cover) and motile invertebrates (abundance per 1.0 m2) survey means, standard deviations and 2022 annual means for Field's Cove StationFC l+0.3m (4+1).

Survey

• 208 2_09* 210 i11 Survey Date 1

' 28-Feb-22 25-Apr-22 01.Ju1~22 26-Oct-22

• Annu;al Annual Taxon Mean Mean Mean Mean Mean Std. Dev.

Substrate Cover rock 21.5 32.8 21.1 17.3 23.19 6.71 sand (shell gravel} 0.3 0.6 1.9 2.1 1.23 0.87 cobble 0.6 0.7 0.7 0.2 0.56 0.23 0 ESLO2023-004 C-11

Appendix C - Intertidal Algae, Invertebrates and Substrates Table C6. Intertidal algae, sessile invertebrates, and substrates (percent cover) and motile invertebrates (abundance per 1.0 m2) survey means, standard deviations and 2022 annual means for Field's Cove Station FC 1+0.9m (4+3).

Survey 208 209 210 211 Survey Date 28-Feb-22 25-Apt-22 01-Jul-22 26-Oct~22 Annual Annual Taxon Mean Mean Mean Mean Mean Std. Dev.

Algae Cover Endoc/adia muricata 15.2 14.9 18.3 7.4 13.96 4.62 non-coralline crust 6.9 6.8 10.8 15.3 9.98 4.03 coralline crust 1.2 1.5 1.3 1.3 1.31 0.12 juv. articulated coralline algae 0.1 1.0 1.0 1.3 0.85 0.49 Cal/iarlhron!Bossiel/a spp.-complex 0.3 1.2 0.5 0.7 0.68 0.37 Corallina vancouveriensis <0.1 0.7 0.2 0.3 0.32 0.29 Mastocarpus papilla/us <0.1 0.5 0.4 <0.1 0.21 0.25 Ge/idium coulteri <0.1 <0.1 <0.1 <0.1 0.04 0.04 Porphyra spp. . - <0.1 - 0.02 0.03 Gelidium pusil/um <0.1 <0.1 <0.1 <0.1 0.01 <0.01 C/adophora spp. <0.1 <0.1 <0.1 <0.1 0.01 <0.01 Prionitis spp. - <0.1 <0.1 <0.1 <0.01 <0.01 Chlorophyta (filamentous) - <0.1 <0.1 - <0.01 <0.01 Mazzael/a /eptorhynchos - - <0.1 - <0.01 <0.01 U/va spp. - <0.1 - - <0.01 <0.01 Invertebrate Counts Anthopleura e/egantissima 80.0 94.4 117.4 144.2 109.00 28.07 Ch/orostoma funebralis 39.8 44.0 131.2 111.4 81.60 46.58 Lottia scabra 16.8 16.2 38.0 53.6 31.15 18.08 Lottia limatula 7.2 3.2 23.8 3.4 9.40 9.77 Pagurus spp. 2.6 13.4 15.2 4.6 8.95 6.27 Lottia pet/a 2.8 0.4 1.6 6.2 2.75 2.50 Lottiidae 1.8 5.4 1.2 1.6 2.50 1.95 Acanthinucel/a spp. 0.2 1.2 2.4 1.8 1.40 0.94 Lottia scutum 0.2 2.4 - 2.4 1.25 1.33 Cyanop/ax spp. 0.4 1.0 0.6 1.4 0.85 0.44 Ocinebrina spp. 1.2 0.4 1.0 0.6 0.80 0.37 Mopa/iaspp. 0.6 0.2 1.6 0.6 0.75 0.60 Li/farina spp. 0.6 0.8 0.2 0.8 0.60 0.28 Myli/usspp. - 0.2 0.2 0.2 0.15 0.10 Grapsidae - 0.2 0.2 - 0.10 0.12 lschnochitonidae - 0.2 - 0.2 0.10 0.12 Epitonium!Opa/ia spp. - - 0.2 - 0.05 0.10 Nuttallina califomica - 0.2 - - 0.05 0.10 Pachygrapsus crassipes 0.2 - - - 0.05 0.10 Serpulidae - - 0.2 - 0.05 0.10 Si pun cu la - - - 0.2 0.05 0.10 Invertebrate Cover Chthama/us fissus 4.4 6.1 4.6 4.7 4.95 0.78 Phragmatopoma califomica 2.4 2.4 2.3 2.9 2.48 0.29 Spirorbidae <0.1 <0.1 <0.1 - <0.01 <0.01 Porifera (encrusting) : <0.1 - - - <0.01 <0.01 (table continued)

,,c.. ESLO2023-004 C-12

Appendix C - Intertidal Algae, Invertebrates and Substrates Table C6 (continued). Intertidal algae, sessile invertebrates, and substrates (percent cover) and.motile invertebrates (abundance per 1.0 m 2) survey means, standard deviations and 2022 annual means for Field's Cove Station FC 1+0.9m 4+3 .

. *. >if1, .

• ' 26;0ct*22*, *,

.Mean. ,: ';i :,\ Nlea~>r 1 Substrate Cover rock 61.3 59.3 53.1 61.4 58.77 3.93 cobble 2.3 3.4 3.8 4.4 3.49 0.91 sand (shell gravel} 4.6 2.6 2.4 1.2 2.69 1.41 C' ESLO2023-004 C-13

Appendix C - Intertidal Algae, Invertebrates and Substrates Table C7. Intertidal algae, sessile invertebrates, and substrates (percent cover) and motile invertebrates (abundance per 1.0 m2) survey means, standard deviations and 2022 annual means for Field's Cove Station FC 2+0.3m (5+ 1).

Survey 208 209 210 . 211 Survey Date 01-Mat-22. 01-Jun-22 28-Jul-22 26-0ct-22 Annual* Annµal Taxon. Mean* Mean Mean Mean Mean Std. Dev.

Algae Cover non-coralline crust 19.7 25.8 25.1 18.8 22.34 3.66 Egregia menziesii I 5.1 13.5 25.1 18.1 15.47 8.~9 Corallina vancouveriensis 15.1 8.6 8.8 10.6 10.78 3.00 juv. articulated coralline algae 10.6 5.8 13.1 5.4 8.73 3.73 coralline crust 6.7 7.2 7.5 5.6 6.75 0.86 Phyl/ospadix spp. 1.5 6.2 5.3 8.7 5.42 2.99 Gelidium coulteri 4.7 7.6 5.3 1.0 4.65 2.70 Cal/iarthron!Bossiel/a spp.-complex 2.7 1.0 2.0 12.7 4.60 5.45 Chrysophyta 1.1 4.5 1.0 <0.1 1.67 1.95 Cryptop/eura violacea 0.6 0.2 1.8 3.8 1.60 1.63 filamentous red algae complex <0.1 1.1 3.8 0.8 1.41 1.63 Prionitis spp. 0.6 0.4 1.0 1.3 0.82 0.37 Endoc/adia muricata 0.8 0.8 0.9 0.5 0.75 0.18 Chondracanthus cana/iculatus <0.1 0.4 1.5 0.4 0.56 0.67 Corallina chilensis 0.2 - - 1.4 0.40 0.67 Gastroc/onium subarticu/atum 0.5 <0.1 0.9 <0.1 0.35 0.43 C/adophora spp. <0.1 0.4 0.5 <0.1 0.23 0.23 Mazzaetla affinis - 0.3 0.4 - 0.18 0.21 Smithora naiadum - - 0.1 0.6 0.17 0.26 U/va spp. <0.1 <0.1 0.4 <0.1 0.11 0.17 Codium fragile subsp. Californicum <0.1 <0.1 <0.1 0.3 0.09 0.13 Sarcodiotheca gaudichaudii <0.1 - - 0.1 0.04 0.07 Gelidium pusillum <0.1 <0.1 <0.1 <0.1 0.02 0.04 Mastocarpus papillatus <0.1 <0.1 <0.1 <0.1 0.02 0.04 Cystoseira osmundacea - - - <0.1 0.02 0.04 Co/pomenia spp. <0.1 <0.1 <0.1 <0.1 <0.01 <0.01 Chlorophyta (filamentous) <0.1 - <0.1 - <0.01 <0.01 Bryopsis spp. <0.1 <0.1 <0.1 <0.1 <0.01 <0.01 Mazzaella leptorhynchos <0.1 <0.1 <0.1 - <0.01 <0.01 Melobesia mediocris - - <0.1 <0.1 <0.01 <0.01 Cal/ophyllis spp. - - - <0.1 <0.01 <0.01 Grateloupia ca/ifomica - <0.1 - - <0.01 <0.01 Mazzael/a flaccida - <0.1 - - <0.01 <0.01 Scytosiphon spp. - <0.1 <0.1 - <0.01 <0.01 Ha/icystis ova/is - <0.1 - - <0.01 <0.01 Laminariales - <0.1 <0.1 - <0.01 <0.01 Osmundea spp. - - <0.1 <0.1 <0.01 <0.01 Chondracanthus corymbiferus - - <0.1 - <0.01 <0.01 Endarachne/Petalonia spp.-complex <0.1 - - - <0.01 <0.01 Halosaccion americanum - <0.1 - - <0.01 <0.01 Mazzael/a oregona - <0.1 - - <0.01 <0.01 Phaeophyla <0.1 - - - <0.01 <0.01 Porphyra spp. - <0.1 - - <0.01 <0.01 Pferosiphonia dendroidea - - <0.1 - <0.01 <0.01 (table continued) t' ESLO202:H04 C-14

Appendix C - Intertidal Algae, Invertebrates and Substrates Table C7 (continued). Intertidal algae, sessile invertebrates, and substrates (percent cover) and motile invertebrates (abundance per 1.0 m 2) survey means, standard deviations and 2022 annual means for Field's Cove Station FC 2+0.3m (5+ 1).

,survey: 208;;, 209 . 210 . 211 , ,

' . ;, .$ulvey Date 0

Q1.*M~r-22. 0Nun~~2 ; *, ?8'.Jul*22 26,0~t-22;. ' . A1111µai' Annual .

Taxon ' . :Mean ,,Mean: . .. .Mean. I Mean:  ;' Std. bev.

Invertebrate Counts Mytilusspp. 124.8 78.6 136.6 132.8 118.20 26.85 Ch/orostoma funebra/is 97.0 48.6 18.2 26.6 47.60 35.34 Strongy/ocentrotus purpuratus 37.8 24.6 31.8 46.8 35.25 9.40 Lottia scabra 19.4 15.6 29.4 43.6 27.00 12.50 Anthopleura e/egantissima 8.8 8.2 6.0 11.0 8.50 2.06 Tetraclita rubescens 7.0 6.8 7.2 1.6 5.65 2.70 Nuttallina ca/ifornica 11.4 6.0 3.6 1.4 5.60 4.30 Lottia limatula 3.2 3.6 4.4 9.6 5.20 2.98 Lottia pelta 5.0 4.8 7.0 3.0 4.95 1.64 Fissure/la volcano 1.6 1.8 1.0 2.2 1.65 0.50 Ba/anus spp. 0.2 1.6 0.6 3.0 1.35 1.25 Lottiidae 0.6 2.2 1.0 1.0 1.20 0.69 Pagurus spp. 1.8 0.4 0.8 0.4 0.85 0.66 Pachygrapsus crassipes 0.4 0.2 2.4 0.4 0.85 1.04 Serpulidae 1.6 0.4 1.4 0.85 0.77 Epiactis prolifera 2.8 0.70 1.40 Nemertea 0.2 1.2 1.2 0.2 0.70 0.58 Acmaea mitra 1.0 0.2 0.8 0.2 0.55 0.41 Leptasterias spp. 1.2 0.8 0.2 0.55 0.55 Lottia scutum 1.6 0.4 0.50 0.76 Chlorostoma brunnea 0.4 0.2 1.0 0.2 0.45 0.38 Lottia gigantea 0.6 0.2 0.6 0.2 0.40 0.23 Nereididae 0.4 0.8 0.2 0.35 , 0.34 Mopa/iaspp. 0.4 0.4 0.6 0.35 0.25 Ocinebrina spp. 0.6 0.4 0.2 0.30 0.26 Acanthinucella spp. 0.2 0.8 0.25 0.38 Serpulorbis squamigerus

• 0.2 0.8 0.25 0.38 Sipuncula 0.2 0.6 0.2 0.25 0.25 Cyanoplax spp. 0.2 0.2 0.4 0.20 0.16 Lacuna spp. 0.2 0.2 0.10 0.12 Lottia insessa 0.2 0.2 0.10 0.12 Tonicel/a lineata 0.2 0.2 0.10 0.12 Crepidula spp.

• 0.2 0.05 0.10 Diodora spp. 0.2 0.05 0.10 Homolopoma /uridum!Lirularia succincta 0.2 0.05 0.10 lschnochitonidae 0.2 0.05 0.10 Lissothuria nutriens 0.2 0.05 0.10 Pol/icipes polymerus 0.2 0.05 0.10 Pugettia spp. 0.2 0.05 0.10 Pycnogonida 0.2 0.05 0.10 Invertebrate Cover Phragmatopoma californica 1.9 0.6 0.6 0.3 0.82 0.72 Pislaspp. <0.1 <0.1 2.1 0.4 0.64 0.98 Chthamalus fissus 0.1 0.8 0.6 <0.1 0.39 0.37 Dodecaceria fewkesi O;~ <0.1 <0.1 0.04 0.07 Spirorbidae <0.1 <0.1 <0.1 <0.01 <0.01 (table continued) t' ESLO2023-004 C-15

Appendix C - Intertidal Algae, Invertebrates and Substrates Table C7 (continued). Inte1iidal algae, sessile invertebrates, and substrates (percent cover) and motile invertebrates (abui1dance per 1.0 m2) survey means, standard deviations and 2022 annual means for Field's Cove Station FC 2+0.3m (5+ 1).

Survey 20,8 209 ,'

210 211 Survey Date 01-Mar-22 01-Jun~22

• 28-Jul-22 26-Od-22 Annual ' , Annual Taxon Mean Mean ,' Mean Mean , Mean Std. Dev.*

Invertebrate Cover (continued)

Porifera (encrusting) <0.1 <0.1 <0.1 <0.1 <0.01 <0.01 tunicates, compound/social - <0.1 <0.1 <0.01 <0.01 Bryozoa (encrusting) <0.1 - <0.1 - <0.01 <0.01 Substrate Cover rock 19.9 24.0 19.6 14.1 19.41 4.08 sand (shell gravel) 3.4 2.2 0.6 2.4 2.14 1.18 cobble 1.8 0.2 0,8 1.2 1.01 0.67 C' ESLO2023-004 C-16

Appendix C - Intertidal Algae, Invertebrates and Substrates Table CS. Intertidal algae, sessile invertebrates, and substrates (percent cover) and.motile invertebrates (abundance per 1.0 m 2) survey means, standard deviations and 2022 annual means for Field's Cove Station FC 2+0.9m (5+3).

, '*208 ',, '

> 209 ,

I,

' .Survey

, Survey Date.* ll1-l\/lar-22 '22-Apr..22

210.

'28,Jul*22,

,211 26~Oct-22 .Annual , Annual*

Taxon .. :, . M~ah*, Me)m *.Mean.***. ~elm * * ,,, Mean., . Std'.'Dev.

Algae Cover Endocladia muricata 22.7 29.9 25.8 19.4 24.43 4.46 non-coralline crust 16.2 15.4 20.6 13.9 16.53 2.86 Mastocarpus papillatus 0.2. 1.5 2.9 0.4 1.24 1.23 coralline crust 0.1 0.1 <0.1 0.4 0.20 0.15 juv. articulated corallin!l algae <0.1 <0.1 <0.1 0.6 0.16 0.27 Phyllospadix spp. - - 0.5 0.12 0.24 C/adophora spp. <0.1 0.1 <0.1 <0.1 0.06 0.07 Gelidium cou/teri <0.1 - 0.2 <0.1 0.06 0.11 Cora/lina vancouveriensis <0.1 0.1 <0.1 - 0.04 0.07 Gelidium pusillum <0.1 <0.1 <0.1 <0.1 0.01 <0.01 Mazzae//a affinis - - <0.1 - <0.01 <0.01 Mazzae//a f/accida <0.1 <0.1 <0.01 <0.01 Mazzaef/a /eptorhynchos - - <0.1 - <0.01 <0.01 Calliarthron!Bossiella spp. -complex - - <0.1 <0.01 <0.01 Prionitis spp. - <0.1 <0.1 <0.01 <0.01 Cryptop/eura violacea - - <0.1 <0.01 <0.01 filamentous red algae complex - - <0.1 <0.01 <0.01 U/vaspp. - - <0.1 - <0.01 <0.01 Invertebrate Counts Ch/orostoma funebralis 43.6 42.4 81.2 55.8 55.75 18.01 Lottiascabra 15.4 14.8 29.6 82.8 35.65 32.17 Anthop/eura elegantissima 30.6 24.2 23.4 19.6 24.45 4.56 Lottia limatula 3.4 3.0 7.8 6.2 5.10 2.29 Lottiapelta 3.4 0.6 3.4 2.0 2.35 1.34 Myti/usspp. 4.4 0.6 3.4 2.10 2.13 Pollicipes polymerus 2.6 0.6 0.2 1.8 1.30 1.10 Pagurus spp. 0.6 - 0.2 4.0 1.20 1.88 Cyanop/ax spp. 0.2 0.4 1.8 1.8 1.05 0.87 Lottiidae 0.2 1.0 1.4 0.4 0.75 0.55 Mopa/iaspp. 0.6 0.2 1.4 0.4 0.65 0.53 Uttorina spp. 0.6 0.4 0.6 0.2 0.45 0.19 Pachygrapsus crassipes - 1.0 0.6 0.40 0.49 Acanthinucelfa spp. - 0.2 1.4 - 0.40 0.67 Sipuncula - - 0.2 1.0 0.30 0.48 Lottia gigantea - 0.2 - 0.4 0.15 0.19 Lottia scutum - 0.4 - 0.10 0.20 Ocinebrina spp. - 0.2 . 0.2 0.10 0.12 Cirratu lidae/Terebellidae - 0.2 - 0.05 0.10 Crepidufa spp. - - 0.2 - 0.05 0.10 Lottia ochracea - - - 0.2 0.05 0.10 Serpulidae - 0.2 - - 0.05 0.10 Invertebrate Cover Chthamafus fissus 0.3 0.6 0.7 <0.1 0.39 0.31 Phragmatopoma ca/ifomica 0.1 0.2 <0.1 0.2 0.16 0.07 Spirorbidae - <0.1 - - <0.01 <0.01 (table continued)

C' ESL02023-004

Appendix C- Intertidal Algae, Invertebrates and Substrates Table CS (conti:q'ued). Intertidal algae, sessile invertebrates, and substrates (percent cover) and motile invertebrates (abundance per 1.0 m 2) survey means, standard deviations and 2022 annual means for Field's Cove Station FC ~+0.9m (5+3).

. .'J09\.J

• • "i2!Apr,2t<"

,;/:Me~n

• Substrate Cover rock 57.3 54.2 52.2 61.7 56.35 4.11 sand (shell gravel) 3.4 1.2 0.4 5.7 2.68 "2.38 cobble 0:3 ,0.2 1.0 0.6 0.50 0.35

.ft  !'

C. ESL02023~004 I

l C-18 I,

I

Appendix C Intertidal Algae, Invertebrates and Substrates TJble C9. Intertidal algae, sessile invertebrates, and substrates (percent cover) and motile invertebrates (abundance per 1.0 m2) survey means, standard deviations and 2022 annual means for Field's Cove Station FC 3+0.3m (6+1).

Survey. 208:' *209 . 2~0. 21'1:

Surv!lyDate .....15-Feb-22 * . .31-May-i2 29-Jul-n An'nual

~

22~.N<>:v-22 Annli~I

. Taxon ' '.

., Mean* Mean;*. Meali Mean- M~an Std:.bev..

Algae Cover non-coralline crust 41.9 27.5 27.8 33.0 32.53 6.72 Phyl/ospadix spp. 10.8 10.5 13.0 13.1 11.84 1.37 Egregia menziesii 3.7 6.1 24.0 13.1 11.74 9.12 coralline crust 5.9 4.1 9.3 5.7 6.25 2.19 Corallina vancouveriensis 2.2 4.1 5.5 13.1 6.23 4.78 juv. articulated coralline algae 10.5 3.5 4.7 4.2 5.71 3.22 Gastroclonium subarticulatum 0.9 3.2 2.9 1.3 2.07 1.16 Chrysophyta 4.0 1.0 0.1 1.27 1.84 Gelidium coulteri 0.5 1.9 1.8 <0.1 1.08 0.94 Calliarthron!Bossiel/a spp.-complex 0.9 <0.1 0.8 1.3 0.78 0.52 Smithora naiadum - 0.1 1.5 0.1 0.43 0.69 Cryptopleura violacea 0.4 0.4 0.3 - 0.2B 0.20 U/vaspp. <0.1 0.3 0.5 <0.1 0.21 0.22 Gelid/um pusillum 0.6 <0.1 <0.1 <0.1 0.1B 0.26 Mazzaella affinis <0.1 - <0.1 0.4 0.11 0.21 Callithamnion spp.lP/eonosporium spp. - 0.3 - 0.09 0.17 Endocladia muricata - 0.3 <0.1 - 0.09 0.13 Cladophora spp. <0.1 <0.1 0.2 <0.1 0.06 0.11 Nereocystis luetkeana - - 0.2 - 0.05 0.10 Prionitis spp. 0.1 - <0.1 <0.1 0.04 0.07 Grateloupia califomica 0.1 - 0.03 0.07 Mastocarpus papillatus <0.1 <0.1 <0.1 <0.1 0.02 0.04 Sarcodiotheca gaudichaudii <0.1 <0.1 0.02 0.04 Scytosiphon spp. - <0.1 <0.1 - 0.02 0.04 Osmundea spp. - - <0.1 0.02 0.03 Chondracanthus canalicu/atus <0.1 <0.1 <0.1 <0.1 0.01 <0.01 Colpomenia spp. <0.1 <0.1 <0.1 <0.1 <0,01 <0.01 Mazzael/a /eptorhynchos <0.1 <0.1 <0.1 <0.01 <0.01 Mazzaella f/accida <0.1 <0.1 <0.01 <0.01 Chlorophyta (filamentous) <0.1 <0.1 <0.1 <0.1 <0.01 <0.01 Codium fragile subsp. californicum - <0,1 <0.1 <0.01 <0.01 filamentous red algae complex - <0.1 <0.1 <0.01 <0.01 Melobesia mediocris - - <0.1 - <0.01 <0.01 Laminariales - . . <0,1 <0.1 <0.01 <0.01 Chondracanthus corymbiferus . <0.1 <0.1 . <0.01 <0.01 Bryopsis spp. - - <0.1 <0.01 <0.01 Callithamnion,pikeanum - <0.1 - - <0.01 <0.01 Mazzael/a oregona - <0.1 - - <0.01 <0.01 Pferosiphonia dendroidea - <0.1 - - <0.01 <0.01 Invertebrate Counts Ch/orostoma funebralis 42.0 27.2 15.4 37.8 30.60 11.89 Strongylocentrotus purpuratus 23.0 24.2 25.4 22.6 23.B0 1.26 Lottia scabra 28,8 18.2 15.4 25.4 21.95 6.21 Mytilus spp. 26.0 20.0 13.0 12.4 17.85 6.44 Tetraclita rubescens 19,2 16.6 13.2 20.6 17.40 3.25 Ba/anus spp. 0.6 5.0 24.4 7.50 11.49 (table continued) t' ESLO2023-004

Appendix C Intertidal Algae, Invertebrates and Substrates Table C9 (continued). Intertidal algae, sessile invertebrates, and substrates (percent cover) and motile invertebrates (abundance per 1.0 m 2) survey means, standard deviations and 2022 annual means for Field's Cove Station FC 3+0.3m (6+1).

' Survey 208 209 210 211.

Survey Date 15-Feb-22 ~1-May-22 29-Jul-22 22-Nov-22 Annual Annual Taxon Mean Mean Mean *. Mean , Mean Std. Dev.

Invertebrate Counts (continued)

Anthopleura e/egantissima 6.4 6.4 5.4 5.6 5.95 0.53 Loffia pelta 4.6 5.8 10.4 2.4 5.80 3.37 Lottia limatula 3.6 4.0 10.0 2.0 4.90 3.51 Pagurus spp. 7.8 1.4 1.0 3.6 3.45 3.12 Fissure/la volcano 2.2 1.6 4.6 2.0 2.60 1.36 Nuttallina ca/ifornica 3.6 2.0 1.8 2.0 2.35 0.84 Lott/a scutum 1.0 0.6 4.6 1.6 1.95 1.81 Serpulidae 2.8 0.4 1.2 0.4 1.20 1.13 Lottiidae 1.2 1.0 1.2 0.8 1.05 0.19 Ocinebrina spp. 1.4 1.2 - 0.4 0.75 0.66 Pachygrapsus crassipes 0.2 1.0 1.4 0.2 0.70 0.60 Nemertea 0.6 1.0 0.6 0.55 0.41 Nereididae 0.2 0.8 1.2 - 0.55 0,55 Sipuncula 0.2 0.4 1.2 0.4 0.55 0.44 Acmaea mitra 0.6 0.2 0.8 0.4 0.50 0.26 Serpulorbis squamigerus 0.4 0.2 0.2 1.2 0.50 0.48 Chlorostoma brunnea - - 0.4 1.2 0.40 0.57 Mopa/iaspp. 0.6 0.8 0.2 - 0.40 0.37 Leptasterias spp. 0.2 0.2 0.8 0.2 0.35 0.30 Lottia gigantea 0.4 0,6 - 0.25 0.30 Cyanoplax spp, - 0.4 0.2 0.15 0.19 Lottia insessa 0.2 0.2 0.2 0.15 0.10 Lotfia qchracea - 0.4 - 0.2

• 0.15 0.19 Pugetfia spp. 0.2 - 0.4 - 0.15 0.19 Tonicel/a fineata - 0.4 0.2 . 0.15 0.19 Epitonium!Opalia spp. 0.2 . 0.2 - 0.10 0.12 Mitra idae - - 0.4 0.10 0.20 Pelecypoda boring - 0.2 0.2 - 0.10 0.12 Acanthinucella spp. . 0.2 . 0.05 0.10 Cirratulidae/Terebellid"'e . - 0.2 - 0.05 0.10 Dfodora spp. 0.2 - - - 0.05 0.10 lschnochilonidae . 0.2 . 0.05 0.10 Ophiothrix spiculata . 0.2 . 0.05 0.10 Patiria miniata - 0.2 . 0.05 0,10 Pisaster ochraceus 0.2 . - 0.05 0.10 Pseudochama spp. 0.2 . - 0.05 0.10 Stenoplax spp. 0.2 . - 0.05 0.10 Ha/iolisspp. 0.1 - - 0.03 0.05 Invertebrate Cover Phragmatopoma ca/ifornica 3.0 2.1 2.4 2.0 2.38 0.44 Pisfa spp. 1.3 <0.1 3.6 2.5 1.86 1.55 Chthamalus fissus <0.1 1.9 0.3 0.3 0.65 0.87 Spirorbidae <0.1 <0.1 <0.1 <0.1 <0.01 <0.01 I

Porifera (encrusting) <0.1 - . <0.1 <0.01 <0.01 tunicates, compound/s~cial - - - <0.1 <0.01 <0.01 Bryozoa (encrusting) <0.1 - - <0.1 <0.01 <0.01 (table continued)

C ESLO2023-004 C-20

Appendix C Intertidal Algae, Invertebrates and Substrates Table C9 (continued). Intertidal algae, sessile invertebrates, and substrates (percent cover) and motile invertebrates (abundance per 1.0 rn 2) survey means, standard deviations and 2022 annual means for Field's Cove Station FC 3+0.3rn (6+ 1).

... ,,208 .

. * :.209\. .,21f..: *:21f ,::-? '*.*

15-Feb-22 t311tv1~y:22 *. 29-Ji.11-22 *

• 22-Nov.22.:

Taxon Meait *L:Mean ' Mean.

• Meaii.' **

Invertebrate Cover (continued)

Hydroidolina <0.1 <0.01 <0.01 Sa/macina tribranchiata <0.1 <0.01 <0.01 Substrate Cover rock 17.3 42.6 26.8 20.1 26.70 11.31 sand (shell gravel) 0.6 4.4 0.7 5,8 2.90 2.65 cobble 0.8 0.2 0.4 1.5 0.75 0,58 t'- ESL02023-004 C-21

Appendix C - Intertidal Algae, Invertebrates and Substrates Table ClO. Inte1iidal algae, sessile invertebrates, and substrates (percent cover) and motile invertebrates (abundance per 1.0 m2) survey means, standard deviations and 2022 annual means for Field's Cove Station FC 3+0.9m (6+3).

Survey 208 209 210 211 Survey Date 15-Feb-22 22-Apr-22 29-Jul-22 22-Nov-22 Annual Annual Taxon Mean Mean Mean Mean Mean Std. Dev.

Algae Cover Endoc!adia muricata 23.7 22.8 28.8 19.3 23.65 3.90 non-coralline crust 21.9 16.9 17.2 22.8 19.74 3.09 coralline crust 0.8 1.9 0.8 1.0 1.13 0.51 Corallina vancouveriensis - 0.6 1.1 2.1 0.94 0.89 Mastocarpus papilla/us 0.2 1.3 1.5 0.7 0.93 0.58 juv. articulated coralline algae 0.4 0.1 <0.1 1.3 0.46 0.56 Gelidium coulteri <0.1 0.4 1.1 - 0.38 0.53 C/adophora spp. <0.1 <0.1 0.8 0.2 0.28 0.38 Ge/idium pusil/um 0.2 - 0.6 <0.1 0.20 0.26 Mazzael/a affinis <0.1 - <0.1 0.6 0.14 0.28 Calliarthron!Bossiella spp.-complex <0.1 0.5 <0.1 <0.1 0.14 0.23 Si/vetia compressa <0.1 0.1 <0.1 0.3 0.12 0.12 Mazzael/a flaccida <0.1 0.3 <0.1 <0.1 0.11 0.16 Prionitis spp. <0.1 <0.1 <0.1 - 0.03 0.04 Chondracanthus canaliculatus <0.1 - <0.1 - <0.01 <0.01 Mazzael/a leptorhynchos - <0.1 <0.1 - <0.01 <0.01 Cryptop/eura violacea <0.1 - - - <0.01 <0.01 Gastroc/onium subarticulatum <0.1 - <0.1 - <0.01 <0.01 U/va spp. - - <0.1 - <0.01 <0.01 Chlorophyta (filamentous) - - - <0.1 <0.01 <0.01 Codium fragile subsp. californicum - - - <0.1 <0.01 <0.01 Co/pomenia spp. - <0.1 - - <0.01 <0.01 filamentous red algae complex - <0.1 - - <0.01 <0.01 Mastocarpus jardinii <0.1 - - - <0.01 <0.01 Invertebrate Counts Lottia scabra 103.4 67.2 98.8 105.8 93.80 17.97 Ch/orostoma funebra/is 56.2 49.8 128.4 71.0 76.35 35.82 Pagurus spp. 9.2 1.8 2.0 18.0 7.75 7.65 Anthop/eura e/egantissima 7.0 3.4 7.4 5.2 5.75 1.84 Lottia /imatula 0.6 1.2 3.6 1.8 1.80 1.30 Lottia pelta 0.2 - 4.0 1.4 1.40 1.84 Lottiidae 0.8 1.0 1.4 1.0 1.05 0.25 Nuttal/ina ca/ifornica 1.4 1.0 1.4 0.2 1.00 0.57 Ocinebrina spp. 1.0 1.4 0.4 0.8 0.90 0.42 Acanthinuce/la spp. 1.0 0.8 0.6 0.6 . 0.75 0.19 Cyanoplax spp. 0.6 0.2 1.8 0.4 0.75 0.72 Mopa/iaspp. 1.2 0.4 0.8 0.2 0.65 0.44 Pachygrapsus crassipes 0.6 0.6 0.4 0.2 0.45 0.19 Littorina spp. - 0.2 0.8 - 0.25 0.38 Myti/usspp. 0.2 0.2 0.2 0.2 0.20 <0.01 Cirratulidae!T erebellidae - - 0.4 - 0.10 0.20 lschnochitonidae 0.2 - 0.2 - 0.10 0.12 Nemertea 0.2 - 0.2 - 0.10 0.12 Fissure/la volcano - - 0.2 - 0.05 0.10 Lottia scutum 0.2 - - - 0.05 0.10 Nereididae - - 0.2 - 0.05 0.10 (table continued)

C' ESLO2023-004 C-22

Appendix C - Intertidal Algae, Invertebrates and Substrates Table ClO (continued). Intertidal algae, sessile invertebrates, and substrates (percent cover) and motile invertebrates (abundance per 1.0 m2) survey means, standard deviations and 2022 annual means for Field's Cove Station FC 3+0.9m (6+3).

Survey:

• 208 "209 210 211 Surv/;!yDate 15-Feb-22 . 22-Apr-22 29-Jul-22 22-Nov-22 Annual Annual Taxon Mean Mean Mean Mean Mean Std. Dev.

Invertebrate Cover Chthamalus fissus 17.1 15.8 17.2 10.8 15.23 3.00 Phragmatopoma californica 4.8 2.7 1.9 1.7 2.78 1.41 Dodecaceria fewkesi - - - <0.1 <0.01 <0.01 Pistaspp. - - <0.1 <0.01 <0.01 Porifera (encrusting) - - <0.1 <0.01 <0.01 Spirorbidae - - <0.1 - <0.01 <0.01 Substrate Cover rock 31.7 36.7 33.1 39.0 35.12 3.32 sand (shell gravel) *- 0.9 4.2 0.4 2.7 2.07 1.75 cobble 0.3 0.4 0.5 <0.1 0.31 0.18 C' ESLO2023-0<>I C-23

Appendix C - Intertidal Algae, Invertebrates and Substrates Table Cll. Intertidal algae, sessile invertebrates, and substrates (percent cover) and motile invertebrates (abundance per 1.0 m2) survey means, standard deviations and 2022 annual means for North Diablo Cove Station NDC 1+0.3m (7+1).

Survey 208 209 210 211 SurveyD~e 31-Jan-22 . 19-May-22 09-Aug-22 23-Nov-22 Annuai Annual Taxon Mean

• Mean Mean Mean Mean Std. Dev.

Algae Cover non-coralline crust 20.9 31.5 9.7 28.0 22.50 9.63 Codium fragile subsp. californicum 7.9 9.6 14.1 15.1 11.69 3.48 Ch rysophyta - 0.1 25.3 6.35 12.62 filamentous red algae complex 4.7 3.7 5.1 5.3 4.67 0.71 coralline crust 4.8 1.7 3.5 3.5 3.39 1.25 juv. articulated coralline algae 2.1 1.0 4.0 0.9 1.98 1.43 Cora/Jina vancouveriensis 1.9 <0.1 0.9 2.6 1.36 1.15 Chlorophyta (filamentous) <0.1 <0.1 4.2 <0.1 1.05 2.08 Acrosorium ciliolatum 0.6 <0,1 0.1 0.19 0.30 Cryptop/eura violacea <0.1 <0.1 <0.1 0.6 0.14 0.28 Farlowia!Pikea spp. -complex <0.1 <0.1 <0.1 0.3 0.11 0.12 Prionitis spp. <0.1 0.1 <0.1 <0.1 0.04 0.07 Mastocarpus papilla/us - <0.1 <0.1 <0.1 0.02 0.04 Plerosiphonia dendroidea <0.1 <0.1 - <0.1 <0.01 <0.01 Ulva spp. <0.1 <0.1 <0.1 <0.1 <0.01 <0.01 Colpomenia spp. - <0.1 <0.1 <0.1 <0.01 <0.01 Bryopsis spp. <0.1 - <0.1 <0.1 <0.01 <0.01 Mazzael/a affinis - <0.1 - <0.1 <0.01 <0.01 Antithamnion/Plerothamnion spp. -complex - - <0.1 <0.01 <0.01 Calliarthron/Bossiella spp.-complex - <0.1 - <0.1 <0.01 <0.01 Chondracanthus corymbiferus <0.1 <0.1 - - <0.01 <0.01 Halicystis ova/is - - - <0.1 <0.01 <0.01 Rhodymenia spp. - - <0.1 <0.01 <0.01 Chondracanthus canaliculatus - <0.1 <0.01 <0.01 Invertebrate Counts Lottia scabra 138.8 81.6 196.0 155.2 142.90 47.42 Tetrac/ita rubescens 84.2 70.6 70.0 39.6 66.10 18.84 Epiactis prolifera - 0.2 152.0 38.05 75.97 Lottia pelta 5.8 18.8 24.6 1.8 12.75 10.73 Fissure/la volcano 14.0 18.0 8.4 5.4 11.45 5.64 Ba/anus spp. - 23.8 2.0 8.2 8.50 10.78 Lottia limatula 3.8 6.2 18.4 3.2 7.90 7.12 Anthop/eura elegantissima 5.2 6.4 3.4 4.6 4.90 1.25 Mytilusspp. 4.4 2.0 1.2 1.6 2.30 1.44 Lolliidae 0.8 3.4 3.2 1.0 2.10 1.39 Pagurus spp. 8.0 0.2 - 2.05 3.97 Strongylocentrotus purpuratus 1.0 1.8 2.8 1.0 1.65 0.85 Pachygrapsus crassipes 1.6 1.0 3.2 0.6 1.60 1.14 Serpulidae 1.2 0.4 2.4 1.2 1.30 0.82 Ocinebrina spp. 0.6 0.2 1.4 1,0 0.80 0.52 Lottia gigantea 1.4 0.6 0.2 0.6 0.70 0.50 Chlorostoma funebralis 1.2 - 0.8 - 0.50 0.60 Cyanoplax spp. 0.4 0.2 0.4 0.2 0.30 0.12 Lottia ochracea - 0.6 - 0.15 0.30 Chlorostoma brunnea - - 0.4 - 0.10 0.20 Epitonium!Opalia spp. 0.2 0.2 - - 0.10 0.12 (table continued) t' ESLO2023-004 C-24

Appendix C- Intertidal Algae, lnv~rtebrates and Substrates Table Cll (continued). Intertidal algae, sessile invertebrates, and substrates (percent cover) and motile invertebrates (abundance per 1.0 m 2) survey means, standard deviations and 2022 annual means for North Diab lo Cov~ Station NDC 1+0.3m (7+ 1).

• *. * * , ** * * , survey ** 20.s :209 * .

• 210 1, **2H * ::./ .>* <; *,: '

., *§urvetPate . 31,Ji:1n;2z 19-May-22 . *o9-A~g-?f * *23°Nov-22 . AnriqaL Anf!u~f taxo11 .* ..c *. '. * >. *

• Mean Mean .* Meaif. Mean. /I 1

. ,.Meah .J. Std:D~\/: . .

Invertebrate Counts (continued) lschnochitonidae 0.2 0.2 0.10 0.12 Uttarina spp. 0.4 0.10 0.20 Nuttallina ca/ifomica 0.4 0.10 0.20 Serpu/orbis squamigerus 0.4 0.10 0.20 Acmaea mitra 0.2 0.05 0.10 Aeo/idia papil/osa 0.2 0.05 0.10 Elysia hedgpethi 0.2 0.05 0:10 Lottia scutum 0.2 *0.05 0.10 Mitra idae 0.2 0.05 0.10 Mopa/iaspp. 0.2 0.05 0.10 Pugeffia spp. 0.2 0.05 0.10 Invertebrate Cover Chthamalus fissus 19.9 21.0 9.7 16.5. 16.75 5.06 Phragmatopoma califomica 2.4 5.2 3.8 1.5 . 3.25 1.61 Spirorbidae <0.1 <0.1 <0.1 <0.1 <0.01 <0.01 Porifera (encrusting) <0.1 <0.01 <0.01 tunicates, compound/social <0.1 <0.01 <0.01 Substrate Cover rock 29.6 28.5 15.9 33.2 26.79 7.53 sand (shell gravel) 6.6 4.9 18.6 5.8 8.99 6.45 cobble 4.0 6.5 8.1 4.4 5.73 1.92

' - 'ESLO2023-004 C-25

Appendix C - Intertidal Algae, Invertebrates and Substrates Table C12. Intertidal algae, sessile invertebrates, and substrates (percent cover) and motile invertebrates (abundance per 1.0 m 2) survey means, standard deviations and 2022 annual means for North Diablo Cove Station NDC 1+0.9m (7+3).

Survey ,208 209 210 211 Survey Date 3.1-Jan-22 19:.May-22 :09-Aug*2~ 23-Nov-22 Ann'ual Annual Taxon "Mean Mean Mean Mean Mean Std. Dev.

Algae Cover non-coralline crust 52.8 50.3 40.3 50.6 48.51 5.56 coralline crust 0.6 0.3 0.1 1.0 0.49 0.37 juv. articulated coralline algae 0.2 0.1 0.7 - 0.26 0.30 Gelidium coufteri <0.1 - 0.6 0.1 0.18 0.26 Mastocarpus papilfatus <0.1 <0.1 <0.1 0.4 0.15 0.19 filamentous red algae complex - <0.1 <0.1 0.4 0.11 0.21 Cod/um fragile subsp. californicum - 0.4 <0.1 0.10 0.21 Chlorophyta (filamentous) - 0.1 <0.1 ,. 0.04 0.07 Coral/Ina vancouveriensis <0.1 - <0.1 0.1 0.04 0.07 Gelidium pusillum <0.1 <0.1 <0.1 <0.1 0.01 <0.01 C/adophora spp. <0.1 <0.1 <0.1 <0.1 <0.01 <0.01 Mazzael/a affinis - <0.1 <0.1 <0.01 <0.01 U/vaspp. - - <0.1 - <0.01 <0.01 Mazzaella leptorhynchos <0.1 <0.1 - - <0.01 <0.01 Invertebrate Counts Lottia scabra 88.8 81.4 133.6 113.6 104.35 23.87 Ch/orostoma funebralis 59.0 57.0 1.4 85.4 50.70 35.32 Lottia limatufa 7.2 5.4 14.6 6.4 8.40 4.20 Epiactis prolifera - 31.4 - 7.85 15.70 Lottie pe/fa 2.6 4.4 13.0 5.2 6.30 4.60 Anthop/eura elegantissima 7.8 7.4 3.8 5.2 6.05 1.89 Pagurus spp. 2.8 - 0.2 3.4 1.60 1.75 Lolliidae 1.0 1.6 1.0 1.0 1.15 0.30 Myti/usspp. 2.6 0.4 1.0 0.4 1.10 1.04 Anlhop/eura xanthogrammica - 2.8 - 0.70 1.40 Fissure/la volcano - 0.8 1.0 0.6 0.60 0.43 Pachygrapsus crassipes 0.4 2.0 - 0.60 0.95 Tetraclita rubescens 1.4 - 0.35 0.70 Ocinebrina spp. 0.4 0.8 0.30 0.38 Acanthinucella spp. 1.0 0.25 0.50 Loftia scutum 0.8 0.2 0.25 0.38 Cyanoplax spp. 0.2 0.4 0.15 0.19 Epitonium/Opalia spp. 0.2 0.2 . - 0.10 0.12 Uftorina spp. 0.4 0.10 0.20 Lottia ochracea 0.4 0.10 0.20 Serpulidae 0.2 - 0.2 - 0.10 0.12 Chforostoma brunnea - - 0.2 - 0.05 0.10 Grapsidae 0.2 - - 0.05 0.10 Mopa/iaspp. 0.2 - - 0.05 0.10 Serpulorbis squamigerus - - 0.2 0.05 0.10 Invertebrate Cover Chthamalus fissus 8.8 10.6 6.6 5.3 7.81 2.34 Phragmatopoma ca/ifornica <0.1 0.1 0.2 <0.1 0.11 0.09 Spirorbidae <0.1 <0.1 <0.1 <0.01 <0.01 (table continued)

~ ESLO2023-004 C-26

Appendix C - Intertidal Algae, Invertebrates and Substrates Table C12 (continued). Intertidal algae, sessile invertebrates, and substrates (percent cover) and motile invertebrates (abundance per 1.0 m 2) survey means, standard deviations and 2022 annual means for North Diablo Cove Station NDC 1+0.9m 7+3 .

208: "* ;'*:,:"209" 31.J~n~22':. :.19~May,?2':

'Mean Mea'n'.<"

Substrate Cover rock 27.0 30.1 33.4 34.6 31.27 3.42 sand (shell gravel) . 7.0 3.7 12.3 6.2 7.29 3.62 cobble 4.5 6.3 7.2 3.0 5.26 1.89 t' ESL02023-0M C-27

Appendix C Intertidal Algae, Invertebrates and Substrates Table C13. Intertidal algae, sessile invertebrates, and substrates (percent cover) and motile invertebrates (abundance per LO m2) survey means, standard deviations and 2022 annual means for North Diablo Cove Station NDC 2+0.3m (8+1).

Survey 208 209 210. 211 Survey Date 18,Jali-22 20-Apr--22 10-Aug-22 09-Dec-22 Annual Annual.

laxon Mean .Mean Mean *Mean Mean Std. Dev.

Algae Cover Phyllospadix spp. 27.1 30.6 44.2 31.5 33.33 7.47 non-coralline crust 23.0 18.9 9.7 17.4 17.26 5.55 Cod/um fragile subsp. californicum 7.7 13.8 20.1 12.0 13.40 5.13 filamentous red algae complex 1.1 5.6 15.9 9.2 7.92 6.27 coralline crust \

12.7 4.0 4.3 7.0 7.01 4.03 juv. articulated coralline algae 10.6 5.2 1.9 7.2 6.22 3.64 Corallina vancouveriensis 3.3 6.9 <0.1 0.9 2.80 3.10 Chrysophyta 2.6 5.0 1.4 - 2.26 2.12 Acrosorium ci/iolatum <0.1 <0.1 0.5 2.5 0.75 1.19 Chlorophyta (filamentous) 0.4 <0.1 0.6 0.9 0.49 0.38 Gelidium coulteri <0.1 1.4 0.3 0.2 0.49 0.62 Calliarthron!Bossiella spp.-complex <0.1 0.8 <0.1 0.7 0.40 0.38 Prionitis spp. 0.1 0.3 <0.1 0.2 0.16 0.12 Cryptopleura violacea

• 0.3 0.3 <0.1 0.14 0.16 Sargassum muticum 0.3 0.1 <0.1 <0.1 0.12 0.16 Farlowia/Pikea spp. -complex - <0.1 0.4 0.11 0.21 Co/pomenia spp. <0.1 0.4 <0.1 <0.1 0.09 0.18 Smithora naiadum <0.1 0.3 <0.1 <0.1 0.07 0.14 U/vaspp. <0.1 <0.1 0.1 <0.1 0.06 0.07 Pferosiphonia dendroidea <0.1 <0.1 0.2 0.06 0.11 Anisoc/adel/a pacifica - 0.1 <0.1 0.04 0.07 Gastroclonium subarticu/atum - 0.1 - - 0.03 0.07 Bryopsis spp. - <0.1 - 0.02 0.04 Mastocarpus papi/latu~ <0.1 <0.1 <0.1 <0.1 <0.01 <0.01 Melobesia mediocris <0.1 <0.1 <0.1 <0.1 <0.01 <0.01 Chondracanthus canaliculatus <0.1 <0.1 <0.1 <0.1 <0.01 <0.01 Halicystis ova/is <0.1 <0.1 <0.1 <0.01 <0.01 Gelid/um pusillum <0.1 <0.1 <0.1 <0.1 <0.01 <0.01 Sarcodiotheca gaudichaudii - <0.1 <0.1 - <0.01 <0.01 Antithamnion!Pferothamnion spp.-complex - - <0.1' <0.01 <0.01 Chondracanthus corymbiferus - - <0.1 <0.01 <0.01 Cora/Jina chilensis <0.1 - - <0.01 <0.01 Mazzae//a sp/endens <0.1 - - <0.01 <0.01 Rhodymenia spp. - <0.1 <0.01 <0.01 Invertebrate Counts Lottia scabra 52.2 198.0 171.2 76.6 124.50 70.96 Myti/us spp. 102.0 96.8 66.0 66.20 46.91 Tetraclita rubescens . 73.8 55.6 54.0 18.8 50.55 22.99 Epiactis prolifera - 22.8 23.6 - 11.60 13.40 Strongylocentrotus purpuratus 4.8 14.2 9.8 3.4 8.05 4.94 Lottia gigantea 5.6 8.4 9.2 4.2 6.85 2.35 Lottia pelta 5.2 5.6 5.2 1.6 4.40 1.88 Lottia limatula 1.8 8.4 4.4 2.4 4.25 2.98 Fissurella volcano . 5.4 4.8 5.2 1.2 4.15 1.98 Anthopleura elegantiss/ma 3.6 3.2 1.0 5.6 3.35 1.89 Ba/anus spp. 2.2 1.2 4.2 0.4 2.00 1.64 (table continued) fa / ESL02023~004 C-28

Appendix C - Intertidal Algae, Invertebrates and Substrates Table C13 (continued). Intertidal algae, sessile invertebrates, and substrates (percent cover) and motile invertebrates (abundance per 1.0 m 2) survey means, standard deviations and 2022 annual means for North Diablo Cove Station NDC 2+0.3m (8+ 1).

. ~urveY 2QS. '* *:2i>9 .. *210,* '

211' **

,, Survey Date fS-Ji,in-22 : 20°Aer.2,2

• 10~A1,.1g*22 . 09,D~c-22

' c

.knhual .Ano1,1al

.:taxon; . *. ', ' Mean .. *Mean** .. . *Mean - '

Mean

" Mean: ' Std.Dev.

Invertebrate Counts (continued)

Lottiidae 2.2 0.6 0.2 1.0 1.00 0.86 Pachygrapsus crassipes 0.4 0.4 1.2 0.8 0.70 0.38 Serpulidae 0.8 0.2 1.2 0.6 0.70 0.42 Ophiothrix spiculata 0:2 1.6 0.45 0.77 Sipuncula 0.2 - 1.6 0.45 0.77 Pugettia spp. - - 1.2 0.4 0.40 0.57 Bar/eeia spp. 0.8 - - 0.6 0.35 0.41 Mopalia spp. 1.2 - - - 0.30 0.60 Pagurus spp. - 1.2 - 0.30 0.60 Anthop/eura xanthogrammica - - 0.8 - 0.20 0.40 Cyanoplax spp. - 0.4 0.4 0.20 0.23 Elysia hedgpethi - - 0.4 0.4 0.20 0.23 Nuttal/ina californica 0.4 - 0.4 0.20 0.23 Acmaea mitra 0.4 - - 0.2 0.15 0.19 Chlorostoma brunnea 0.4 - - - 0.10 0.20 Lacunaspp. 0.4 0.10 0.20 Ocinebrina spp. - 0.4 - 0.10 0.20 Pelecypoda boring 0.2 - 0.2 0.10 0.12 Septifer bifurcatus 0.2 0.2 - 0.10 0.12 Serpu/orbis squamigerus 0.2 0.2 - - 0.10 0.12 Cal/iostoma ligatum - 0.2 - - 0.05 0.10

• cancridae - - - 0.2 0.05 0.10 Chlorostoma funebralis - - 0.2 0.05 0.10 Cucumaria spp. 0.2 - - 0.05 0.10 Grapsidae - 0.2 0.05 0.10 Littorina spp. - - . 0.2 0.05 0.10 Mitra idae - 0.2 . - 0.05 0.10 Nereididae - - - 0.2 0.05 0.10 Pollicipes polymerus 0.2 - - - 0.05 0.10 Williamia pe/toides - - 0.2 0.05 0.10 Invertebrate Cover Pista spp. 6.1 8.0 1.3 1.8 4.29 3.29 Chthamalus fissus 0.2 0.2 <0.1 0.9 0.35 0.38 Phragmatopoma californica <0.1 1.4 - <0.1 0.35 0.69 Porifera (encrusting) <0.1 0.3 <0.1 <0.1 0.07 0.14 Spirorbidae <0.1 <0.1 <0.1 <0.1 <0.01 <0.01 Bryozoa (encrusting) <0.1 - <0.1 <0.01 <0.01 tunicates, compound/social - <0.1 <0.1 <0.01 <0.01 Hydroidolina <0.1 . - <0.01 <0.01 Spheciospongia' confoederata <0.1 - . - <0.01 <0.01 Substrate Cover rock 21.7 16.6 19.2 19.9 19.32 2.10 sand (shell gravel) 1.6 12.1 13.8 14.9 10.61 6.12 cobble 2.6 2.0 1.7 0.8 1.77 0.73 t"' ESLO2023-004 C-29

Appendix C - Intertidal Algae, Invertebrates and Substrates Table Cl4. Intertidal algae, sessile invertebrates, and substrates (percent cover) and motile invertebrates

, (abundance per 1.0 m2) survey means, standard deviations and 2022 annual means for North Diablo Cove Station NDC 2+0.9m (8+3).

Survey 208 209 210 211 Survey Date 18-Jan-22 20-Apr-22 10-Aug-22 09-Dec-22 Annual Annual Taxon Mean Mean Mean Mean Mean Std. Dev.

Algae Cover non-coralline crust 11.4 12.4 17.0 15.4 14.05 2.62 Ch rysophyta - 5.1 17.9 0.1 5.80 8.43 filamentous red algae complex 1.2 2.2 7.6 1.9 3.23 2.93 coralline crust 3.0 1.4 2.2 1.3 1.96 0.78 Corallina vancouveriensis 0.8 1.4 <0.1 - 0.57

• 0.66 juv. articulated coralline algae 0.6 0.9 <0.1 0.3 0.46 0.36

• Chlorophyta (filamentous) 0.2 <0.1 1.1 0.2 0.39 0.50 Gelidium coulteri <0.1 0.2 0.2 0.5 0.23 0.20 U/vaspp. <0.1 <0.1 0.6 <0.1 0.16 0.31 Codium fragile subsp. californicum <0.1 - <0.1 0.6 0.14 0.28 Mastocarpus papilla/us <0.1 <0.1 <0.1 0.1 0.04 0.07 Bryopsis spp. <0.1 - <0.1 - 0.03 0.04 Mazzael/a affinis <0.1 <0.1 <0.1 <0.1 0.02 0.03 Cal/iarthron!Bossiel/a spp.-complex - <0.1 - <0.1 0.02 0.03 Gelidium pusil/um <0.1 <0.1 <0.1 <0.1 0.01 <0.01 C/adophora spp. - <0.1 <0.1 - <0.01 <0.01 Prionitis spp. <0.1 - <0.1 <0.1 <0.01 <0.01 Co/pomenia spp. - <0.1 - <0.1 <0.01 <0.01 Chondracanthus canaliculatus <0.1 <0.1 - - <0.01 <0.01 Invertebrate Counts Lottia scabra 123.2 306.4 179.4 250.6 214.90 80.24 Myti/usspp. 42.2 48.2 31.4 26.0 36.95 10.08 Lottia gigantea 11.4 11.0 13.6 17.8 13.45 3.12 Lottiidae 22.0 3.6 11.0 12.0 12.15 7.56 Anthopleura e/egantissima 9.6 5.6 7.4 13.4 9.00 3.36 Lottia limatula 2.0 12.6 14.6 6.8 9.00 5.72 Epiactis prolifera - 10.4 23.4 - 8.45 11.11 Lottia pe/ta 1.6 8.0 13.6 1.6 6.20 5.78 Ch/orostoma funebralis 13.0 0.4 0.2 1.4 3.75 6.19 Ba/anus spp. - 7.6 - - 1.90 3.80 Pachygrapsus crassipes 2.4 0.6 3.2 0.2 1.60 1.43 Cyanop/ax spp. 1.0 1.2 3.0 1.0 1.55 0.97 Fissure/la volcano 1.0 0.2 0.6 0.8 0.65 0.34 Strongy/ocentrotus purpuratus 1.8 0.6 - 0.2 0.65 0.81 Tetraclita rubescens 1.0 1.0 - 0.6 0.65 0.47 Littorina spp. 1.0 0.6 0.2 - 0.45 0.44 Lottia ochracea - 1.0 - - 0.25 0.50 Anthop/eura xanthogrammica - - 0.8 - 0.20 0.40 Ocinebrina spp. - 0.2 0.2 - 0.10 0.12 Sipuncula 0.2 - 0.2 - 0.10 0.12 Acanthinucel/a spp. 0.2 - - - 0.05 0.10 Ch/orostoma brunnea 0.2 - - - 0.05 0.10 Cirratulidae/Terebellidae - - 0.2 - 0.05 0.10 Diau/ula sandiegensis - - - 0.2 0.05 0.10 Heptacarpus spp. 0.2 - - - 0.05 0.10 Lottia insessa - - - 0.2 0.05 0.10 (table continued) t' ESLO2023-0CM C-30

Appendix C Intertidal Algae, Invertebrates and Substrates Table C14 (continued). Intertidal algae, sessile invertebrates, and substrates (percent cover) and motile invertebrates (abundance per 1.0 m 2) survey m~ans, standard deviations and 2022 annual means for North Diablo Cove Station NDC 2+0.9m (8+3).

. Survey I* , 208 \20!f . 21.~~

21f'.

Survey Date 18°Jan-22 *2o;Apr-2i 10-Aug~22 09-Dec~22 Annual *Annual Taxon

• Mean Mean Mean Mean Mean Std.. Dev.

Invertebrate Counts (continued)

Nernertea 0.2 - - - 0.05 0.10 Nutta/lina califomica 0.2 . - - 0.05 0.10 Pollicipes polymerus . - 0.2 0.05 0.10 Serpulidae - . . 0.2 0.05 0.10 Invertebrate Cover Chthamalus fissus 19.9 11.4 5.6 18.0 13.73 6.53 Phragmatopoma califomica 0.4 <0.1 <0.1 <0.1 0.11 0.21 Spirorbidae <0.1 . <0.1 <0.1 <0.01 <0,01 Bryozoa (encrusting) - - - <0.1 <0.01 <0,01 Substrate Cover rock 59.8 60.9 48.6 56.7 56.51 5.55 cobble 0.5 4,0 1.0 4.1 2.41 1.92 sand (shell gravel) 0.2 0.1 0.4 0.4 0.28 0.13

.C' ESLO2023-004 C-31

Appendix C - Intertidal Algae, Invertebrates and Substrates Table ClS. Intertidal algae, sessile invertebrates, and substrates (percent cover) and motile invertebrates (abundance per 1.0 m2) survey means, standard deviations and 2022 annual means for North Diablo Cove Station NDC 3+0.3m (9+1).

Survey 208 209 210 211 Survey Date 17-Jan-22 16-May-22 11-Aug-22 07-Dec-22 Annual Annual Taxon Mean Mean Mean Mean Mean Std. Dev.

Algae Cover Codium fragile subsp. californicum 20.8 35.2 57.8 17.6 32.83 18.32 non-coralline crust 14.3 18.1 18.8 20.8 17.99 2.71 coralline crust 17.1 14.5 8.0 6.0 11.39 5.26 Corallina vancouveriensis 4.5 6.9 8.9 16.2 9.13 5.07 juv. articulated coralline algae 15.9 4.2 3.2 6.1 7.34 5.83 filamentous red algae complex 7.6 7.4 6.9 2.0 5.96 2.69 Acrosorium ciliolatum 0.1 2.3 1.7 12.4 4.12 5.57 Chrysophyta 1.0 7.6 0.3 0.5 2.34 3.54 Chlorophyta (filamentous) 2.5 <0.1 0.8 3.1 1.58 1.43 Cryptopleura violacea 3.5 0.3 <0.1 0.1 0.98 1.67 Farlowia/Pikea spp.-complex 0.5 0.7 <0.1 1.5 0.68 0.58 Ca/liarfhron!Bossiel/a spp.-complex 1.1 0.1 0.2 1.1 0.65 0.54 Chondracanthus canaliculatus - - - 1.6 0.40 0.80 Prionitis spp. <0.1 0.2 1.3 <0.1 0.37 0.60 Corallina chilensis - 1.0 - <0.1 0.26 0.52 Gelidium coulteri - 0.1 <0.1 0.4 0.16 0.18 Sargassum muticum 0.4 0.2 - - 0.16 0.20 Ulvaspp. <0.1 0.4 <0.1 0.1 0.14 0.15 Colpomenia spp. <0.1 0.2 <0.1 <0.1 0.06 0.11 P/erosiphonia dendroidea <0.1 0.2 <0.1 <0.1 0.06 0.10 Sarcodiotheca gaudichaudii - <0.1 - - 0.02 0.04 Rhodymenia spp. - <0.1 <0.1 - 0.02 0.03 Dictyota binghamiae - <0.1 - - 0.02 0.03 Halicystis ova/is <0.1 <0.1 <0.1 <0.1 <0.01 <0.01 Mastocarpus papilla/us <0.1 - <0.1 - <0.01 <0.01 Bryopsis spp. - <0.1 <0.1 - <0.01 <0.01 Gelidium pusi/lum <0.1 - <0.1 - <0.01 <0.01 Endarachne!Petalonia spp.-complex - <0.1 <0.1 - <0.01 <0.01 Rhodophyta Uuv. blades) - <0.1 - <0.1 <0.01 <0.01 Callophyl/is spp. - <0.1 - - <0.01 <0.01 Chondracanthus corymbiferus - <0.1 - - <0.01 <0.01 Gelidium robustum - <0.1 - - <0.01 <0.01 Halymenia/Schizymenia spp.-complex - <0.1 - - <0.01 <0.01 Mazzael/a affinis - <0.1 - - <0.01 <0.01 Invertebrate Counts Lottia scabra 77.8 86.2 129.8 100.6 98.60 22.83 Tetraclita rubescens 103.4 68.8 96.6 110.4 94.80 18.23 Fissure/la volcano 22.2 52.8 32.6 18.4 31.50 15.42 Mytilus spp. 6.2 19.2 10.2 67.2 25.70 28.20 Lottia pelta 9.0 26.8 35.0 8.0 19.70 13.37 Lottia limatula 1.8 8.8 7.2 7.0 6.20 3.04 Lottia gigantea 2.2 5.4 5.2 8.2 5.25 2.45 Epiactis prolifera 1.4 - 15.2 - 4.15 7.40 Strongylocentrotus purpuratus 2.8 6.4 3.4 2.6 3.80 1.77 Serpulidae 4.0 2.2 1.4 2.8 2.60 1.10 Anthopleura elegantissima 1.0 5.2 0.6 1.4 2.05 2.13 (table continued)

C' ESLO2023-004 C-32

_J

Appendix C- Intertidal Algae, Invertebrates and Substrates Table Cl5 (continued). Intertidal algae, sessile invertebrates, and substrates (percent cover) and motile invertebrates (abundance per 1.0 m 2) survey means, standard deviations and 2022 annual means for North Diablo Cove Station NDC 3+0.3m (9+1).

• survey_ 208 209 .210 . 211. ;

1*

Survey Date 17-Jan-.?2' 16-May-22 11-Aug~22 07-Dec-22

• Annual* .. Annual Taxon Mean Mean Mean Mean Mean. Std. Dev.

Invertebrate Counts (continued)

Lottiidae 1.0 3.0 1.0 1.0 1.50 1.00 Mopalia spp. 0.2 4.4 . 1.15 2.17 Pachygrapsus crassipes 1.2 1.0 1.0 0.8 1.00 0.16 Ba/anus spp. 2.8 0.8 . . 0.90 1.32 Cyanop/ax spp. 0.2 0.6 0.6 - 0.35 0.30 Acmaea mitra - 1.2 - - 0.30 0.60 Pugeitia spp. - 0.2 0.8 0.25 0.38 Sipuncula 0.8 - 0.2 - 0.25 0.38 Barleeia spp. 0.6 - - 0.2 0.20 0.28 lschnochitonidae 0.2 0.2 0.4 0.20 0.16 Panulirus interruptus 0.8 - . 0.20 0.40 Doris spp. . - 0.2 0.2 0.10 0.12 Pollicipes po/ymerus - 0.4 - - 0.10 0.20 Diodora spp. 0.2 - - - 0.05 0.10 Elysia hedgpethi - - 0.2 0.05 0.10 Homo/opoma luridum/Urularia succincta 0.2 - - 0.05 0.10 Nuitallina californica 0.2 0.05 0.10 Pferopurpura festiva 0.2 . - 0.05 0.10 Tonicel/a lineata - - 0.2 - 0.05 0.10 Invertebrate Cover Phragmatopoma californica 1.0 5.4 1.2 0.4 1.98 2.32 Chthamalus fissus 0.8 1.5 0.8 0.4 0.86 0.46 Porifera (encrusting) <0.1 <0.1 <0.1 <0.1 0.01 <0.01 tunicates, compound/social - <0.1 <0.1 <0.1 <0.01 <0.01 Bryozoa (encrusting) - - <0.1 <0.1 <0.01 <0.01 Spirorbidae <0.1 <0.1 <0.1 <0.1 <0.01 <0.01 Salmacina tribranchiata - - * <0.1 <0.01 <0.01 Clathrina blanca - - <0.1 <0.01 <0.01 Haliclona spp. - - <0.1 <0.01 <0.01 ,

Hydroidolina <0.1 - - - <0.01 <0.01 Substrate Cover rock 22.5 22.6 18.3 19.1 20.62 2.23 cobble 2.8 5.0 3.9 7.8 4.86 2.15 sand (shell gravel) 0.6 0.1 <0.,1 <0.1 0.19 0.25 t' ESL02023-004 C-33

Appendix C Intertidal Algae, Invertebrates and Substrates Table C16. Intertidal algae, sessile invertebrates, and substrates (percent cover) and motile invertebrates (abundance per 1.0 m2) survey means, standard deviations and 2022 annual means for North Diablo Cove Station NDC 3+0.9m (9+3).

Survey 208 209 210 211 Survey Date 17-Jan-22 16-May-22 11-Aug-22 07-Dec-22 Annual Annual Taxon Mean Mean Mean Mean Mean Std. Dev.

Algae Cover non-coralline crust 16.9 14.1 24.0 23.5 19.64 4.90 Codium fragile subsp. califomicum 5.5 8.3 13.7 7.6 8.75 3.49 coralline crust 4.4 6.0 1.0 3.8 3.81 2.06 filamentous red algae complex 2.2 6.3 1.7 0.8 2.73 2.46 juv. articulated coralline algae 4.0 0.8 <0.1 1.6 1.62 1.68 Chrysophyta . 1.6 4.0 <0.1 1.41 1.90 Chlorophyta (filamentous) 1.0 <0.1 0.3 3.3 1.15 1.47 Corallina vancouveriensis 0.8 1.0 1.1 1.0 0.97 0.11 U/vaspp. <0.1 <0.1 1.6 1.0 0.66 0.77 Acrosorium ciliolatum 0.3 <0.1 1.3 0.38 0.59 Cryptopleura violacea 1.0 - - <0.1 0.24 0.49 Farlowia/Pikea spp. -complex <0.1 <0.1 - 0.3 0.12 0.15 Prionitis spp. <0.1 0.2 <0.1 <0.1 0.07 0.10 Sargassum muticum - 0.1 0.1 0.07 0.08 Gelid/um pusillum 0.2 <0.1 <0.1 <0.1 0.06 0.11 Gelid/um coulteri - 0.2 0.05 0.11 Chondracanthus cana/icu/atus - <0.1 - 0.02 0.04 Mastocarpus papillatus <0.1 <0.1 <0.1 <0.1 <0.01 <0.01 Colpomenia spp. <0.1 <0.1 <0.01 <0,01 Pferosiphonia dendroidea <0.1 <0.1 <0.1 <0.1 <0.01 <0.01 Halicystis ova/is - <0.1 <0.1 <0.01 <0.01 Cal/iarthron!Bossiella spp.-complex - <0.1 <0.1 <0.01 <0.01 Endarachne/Petalonia spp. -complex - <0.1 <0.1 - <0.01 <0.01 Bryopsis spp. <0.1 - - <0.01 <0.01 Chondracanthus corymbiferus <0.1 . - <0.01 <0.01 C/adophora spp. - <0.1 . - <0.01 <0.01 Invertebrate Counts Lottia scabra 150.0 284.6 85.4 100.4 155.10 90.64 My/i/usspp. 36.2 143.8 58.0 82.6 80.15 46,47 Tetraclita rubescens 44.2 48.4 13.6 5.6 27.95 21.51 Lottie gigantea 14.0 22.6 10.6 15.6 15.70 5.05 Fissure/la volcano 19.4 13.6 8.4 3.8 11.30 6.72 Epificlis prolifera 3.0 35.4 6.2 11.15 16.36 Lott/a pelta 8.0 6.0 13.2 1.4 7.15 4.89 Lottia limatula 2.6 6.6 2.8 5.6 4.40 2.01 Lottiidae 8.4 4.2 0.8 2.0 3.85 3.34 Ba/anus spp. 8.0 1.6 - 2.40 3.81 Anthopleura elegantissima 1.8 2.2 0.4 2.0 1.60 0.82 Littorina spp. 0.4 5.0 - - 1.35 2.44 Pachygrapsus crassipes 1.6 0.8 2.0 0.8 1.30 0.60 Strongylocentrotus purpuratus 1.8 0.4 0.4 1.8 1.10 0.81 Serpulidae 1.0 0.8 0.2 0.4 0.60 0.37 Cyanoplax spp. . 1.0 0.2 0.2 - 0.35 0.44 Lottiascutum - - 1.4 - 0.35 0.70 Bar/eeia spp. 0.6 - 0.4 0.25 0.30 Mapa/la spp. 0.2 0.2 - 0.10 0.12 (table continued)

C' ESLO2023-0IM C-34

• Appendix C Intertidal Algae, Invertebrates and Substrates Table Cl6 (continued). Intertidal algae, sessile invertebrates, and substrates (percent cover) and motile invertebrates (abundance per 1.0 m 2) survey means, standard deviations and 2022 annual means for North Diablo Cove Station NDC 3+0.9m (9+3).

' ;s "

" Sµrvey 208' 209, '21(F ", *21f' : *' "'

Survey Date '* 17-Jan-22 16~May-22 11-Aug*22 07-Dec~22* Annual Annual Taxon Mean Mean Mean. Mean . ' Mean Std. Dev.

Invertebrate Counts (continued)

Ocinebrina spp. 0.2 0.2 0.10 0.12 Acanthinuce/Ja spp. - 0.2 - - 0.05 0.10 Elysia hedgpethi - 0.2 - - 0.05 0.10 Grapsidae - - 0.2 - 0.05 0.10 Heptacarpus spp. - 0,2 - 0.05 0.10 lschnochitonidae 0.2 - - - 0.05 0,10 Nuttallina californica - - 0.2 - 0.05 0.10 Invertebrate Cover Chthamalus fissus 12.2 7.9 4.2 14.4 9.65 4.53 Phragmatopoma ca/ifomica 0.8 2.3 0.6 <0.1 0.92 0.97 Spirorbidae - - <0,1 <0.1 <0.01 <0.01 Porifera (encrusting) - - <0.1 - <0.01 <0.01 tunicates, compound/social - - - <0.1 <0.01 <0.01 Substrate Cover rock 48.3 53.6- 50.8 42.8 48.89 4.57 cobble 3.6 0.3 1.7 2.0 1.91 1.34 sand (shell gravel) <0,1 <0.1 0.4 <0.1 0.12 0.15 t' ESLO2023-004 C-35

/

Appendix C - Intertidal Algae, Invertebrates and Substrates Table C17. Intertidal algae, sessile invertebrates, and substrates (percent cover) and motile invertebrates (abundance per 1.0 m 2) survey means, standard deviations and 2022 annual means for South Diablo Cove Station SDC 1+0.3m (10+ 1).

Survey 208 209 210 211 Survey Date 02-Feb-22 18-Apr-22 11-Aug-22 08-Dec-22 Annual Annual Taxon Mean Mean Mean Mean Mean Std. Dev.

Algae Cover filamentous red algae complex 17.4 17.1 44.7 13.3 23.11 14.48 coralline crust 7.7 9.4 9.0 15.1 10.31 3.30 non-coralline crust 11.3 16.5 3.9 4.0 8.94 6.13 Chrysophyta - 15.1 1.1 - 4.05 7.37 Corallina vancouveriensis 6.7 4.0 0.5 <0.1 2.83 3.15 juv. articulated coralline algae 3.1 5.7 0.5 .1.5 2.68 2.27 Sargassum muticum 0.1 1.2 0.4 0.2 0.49 0.48 Gelidium coulteri - 0.8 - <0.1 0.19 0.38 Co/pomenia spp. - 0.5 - - 0.12 0.25 Chlorophyta (filamentous) <0.1 0.4 <0.1 <0.1 0.11 0.17 Acrosorium ci/iolatum <0.1 0.1 0.1 0.1 0.11 0.07 C/adophora spp. - - - 0.1 0.04 0.07 Pferosiphonia dendroidea <0.1 <0.1 - <0.1 0.04 0.04 Ge/idium pusil/um - <0.1 - <0.1 0.02 0.04 Cryptopleura vio/acea - - <0.1 - 0.02 0.03 U/va spp. - <0.1 <0.1 - <0.01 <0.01 Mastocarpus papillatus <0.1 <0.1 - - <0.01 <0.01 Grateloupia californica - - <0.1 - <0.01 <0.01 Chondracanthus cana/iculatus - <0.1 - - <0.01 <0.01 Prionitis spp. - <0.1 - - <0.01 <0.01 Invertebrate Counts Lottia scabra 62.8 105.2 65.8 35.0 67.20 28.88 Anthop/eura e/egantissima 26.2 36.4 16.2 28.4 26.80 8.32 Chlorostoma funebralis - 0.2 20.8 51.0 18.00 24.07 Tetrac/ita rubescens 21.6 16.2 6.0 11.4 13.80 6.66 Lottia pe/ta 2.0 18.0 11.4 7.2 9.65 6.77 Lottia limatula 2.0 18.8 7.2 5.0 8.25 7.35 Strongylocentrotus purpuratus 5.0 7.2 8.6 9.0 7.45 1.81 Fissure/la volcano 5.8 7.6 5.0 9.8 7.05 2.13 Ba/anus spp. 4.6 4.6 2.8 5.2 4.30 1.04 Myti/usspp. 1.6 1.2 0.8 3.6 1.80 1.24 Lottiidae 1.0 1.0 2.2 2.4 1.65 0.75 Pagurus spp. 0.6 - 0.2 2.2 0.75 1.00 Barleeia spp. 0.6 0.2 1.0 1.0 0.70 0.38 Acanthinucel/a spp. - - 0.6 1.8 0.60 0.85 Cirratulidaefferebellidae - - 1.6 - 0.40 0.80 Nemertea - - 1.0 0.4 0.35 0.47 Ocinebrina spp. 0.8 0.4 - - 0.30 0.38 Mopalia spp. 0.4 0.2 - 0.6 0.30 0.26 Ch/orostoma brunnea - - 0.2 0.8 0.25 0.38 Serpulidae - 0.2 - 0.8 0.25 0.38 Anthop/eura artemisia - 0.2 0.4 0.2 0.20 0.16 Nuttallina californica . 0.4 - 0.4 0.20 0.23 Cyanoplax spp. - - 0.4 0.2 0.15 0.19 Heptacarpus spp. . - 0.2 0.4 0.15 0.19 Lottia ochracea - 0.2 0.2 0.2 0.15 0.10 (table continued) t' ESLO2023-004 C-36

- - _ _J

Appendix C Intertidal Algae, Invertebrates and Substrates Table C17 (continued). Intertidal algae, sessile invertebrates, and substrates (percent cover) and motile invertebrates (abundance per 1.0 m2) survey means, standard deviations and 2022 annual means for South Diablo Cove Station SDC 1+0.3m (10+1).

• , . 21r*.:

Sur\i~y* ' 2,08 209.* *. 210 Survey Date

• 02-Feb-22 18,Apr,,22 11-Aug~22 08-Dec-22 Annuaf Annual Taxon Mean .

• Mean Mean* Mean. Mean Std. Dev.

Invertebrate Counts (continued)

Ophiactis simplex - - 0.4 0.2 0.15 0.19 Pseudochama spp. 0.2 - . 0.4 0.15 0.19 Pferopurpura festiva 0.2 - - 0.4 0.15 0.19 Pelecypoda boring . 0.6 - . 0.15 0.30 Acmaea mitra - - 0.4 0.10 0.20 Nereididae 0.4 - - 0.10 0.20 Chaetopteridae - - 0.2 0.05 0.10 Oorisspp. - 0.2 0.05 0.10 Epiactis prolifera - 0.2 - - 0.05 0.10 Epitonium!Opalia spp. ' - 0.2 0.05 0.10 Lifforina spp. 0.2 - 0.05 0.10 Lottia gigantea - - 0.2 - 0.05 0.10 Octopus spp. - - 0.2 - 0.05 0.10 Ophiopteris papillosa 0.2 - 0.05 0.10 Pachygrapsus crassipes - - 0.2 - 0.05 0.10 Pisaster ochraceus - 0.2 0.05 0.10 Pugettiaspp. - - 0.2 - 0.05 0.10 Sipuncula - 0.2 - 0.05 0.10 Invertebrate Cover Chthama/us fissus 0.8 1.5 5.6 <0.1 2.02 2.48 Phragmatopoma califomica 1.5 0.8 0.4 2.9 1.41 1.11 Pisfa spp. 0.3 . - <0.1 0.07 0.14 Spirorbidae <0.1 <0.1 <0.1 <0.01 <0.01 Porifera (encrusting) . - <0.1 <0.1 <0.01 <0.01 Bryozoa (encrusting) <0.1 <0.1 - - <0.01 <0.01 tunicates, compound/social <0.1 - . - <0.01 <0.01 Substrate Cover rock 42.6 22.6 27.8 46.9 35.02 11.62 cobble 7.1 7.8 4.2 4.9 5.99 1.75 sand (shell gravel) 1.7 2.9 2.6 2.9 2.54 0.59 C' ESLO2023-0(J.4 C-37

Appendix C Intertidal Algae, Invertebrates and Substrates Table C18. Intertidal algae, sessile invertebrates, and substrates (percent cover) and motile invertebrates

• (abundance per 1.0 m2) survey means, standard deviations and 2022 annual means for South Diablo Cove Station SDC 1+0.6m (10+2) .

.Survey 208 209 210 211 Survey Date

• 02-Feb-22 18-Apr-22 11-AUg-22 08-Dec-22

• Annual Annual iaxon Mean Mean Mean Mean . Mean Std. Oev.

Algae Cover non-coralline crust 20.2 20.2 18.5 19.9 19.69 0.83 coralline crust 8.8 7.0 11.0 13.9 10.19 2.96 filamentous red algae complex 4.9 2.8 17.5 0.8 6.53 7.50 Corallina vancouveriensis 7.2 2.8 2.2 1.4 3.39 2.62 juv. articulated coralline algae 3.1 7.2 0.6 1.0 2.97 3.00 Chrysophyta <0.1 10.5 0.6 - 2.80 5.14 Ge/idium cou/teri 0.2 1.7 - 0.2 0.52 0.77 Chlorophyta (filamentous) <0.1 0.7 0.1 <0.1 0.21 0.33 Sargassum muticum 0.3 0.3 0.2 <0.1 0.21 0.15 Acrosorium ci/iolatum - - 0.5 0.2 0.17 0.23 Pferosiphonia dendroidea <0.1 <0.1 <0.1 0.1 0.04 0.07 Cryptopleura vio/acea <0.1 - - 0.02 0,04 Mazzael/a affinis - - <0.1 - 0.02 0.04 Mastocarpus papillatus <0.1 <0.1 <0.1 <0.1 <0.01 <0.01 Gelidium pusi/lum <0.1 <0.1 <0.1 <0.01 <0.01 Prionitis spp. <0.1 <0.1 <0.1 <0.1 <0.01 <0.01 U/va spp. . <0.1 <0.1 - <0.01 <0.01 C/adophora spp. - <0.1 - <0.1 <0.01 <0.01 Colpomenia spp. <0.1 - - <0.01 <0.01 Laminariales - <0.1 - - <0.01 <0.01 Gastroclonium subarticulatum - <0.1 - - <0.01 <0.01 Osmundea spp. - - <0.1 <0.01 <0.01 Bryopsis spp. <0.1 . <0.01 <0.01 Gau/acanthus okamurae - <0.1 - - <0.01 <0.01 Grate/oupia ca/ifornica . <0.1 - - <0.01 <0.01 Phaeophyta <0.1 - - <0.01 <0.01 Invertebrate Counts Lottia scabra 47.2 139.6 106.4 72.8 91.50 40.20 Anthop/eura e/egantissima 29.4 53.4 44.4 44.2 42.85 9.94 I

Tetraclita rubescens 57.0 48.4 23.2 21.0 37.40 18.03 Chlorostoma funebralis 6.2 8.2 9.0 119.8 35.80 56.01 Lottiapelta 4.2 17.8 11.0 6.8 9.95 5.94 Lottia limatu/a 3.4 16.2 9.4 6.2 8.80 5.51 Strongylocentrotus purpuratus 4.4 7.4 13.0 8.8 8.40 3.57 Myti/us spp. 4.2 6.6 7.8 12.4 7.75 3.44 Ba/anus spp. 24.2 - 1.4 1.0 6.65 11.71 Fissure/la volcano 4.8 3.8 4.0 4.0 4.15 0.44 Pagurus spp. 3.6 - 2.4 1.6 1.90 1.51 Lottiidae 1.0 1.2 2.0 1.2 1.35 0.44 Acanthinucel/a spp. - 0.2 0.2 3.6 1.00 1.74 Serpu/orbis squamigerus 1.2 0.4 0.2 0.8 0.65 0.44 Bar!eeia spp. 0.4 0.2 1.0 0.6 0.55 0.34 Pachygrapsus crassipes - 0.8 1.4 0.55 0.68 Nemertea - 0.4 0.6 0.6 0.40 0.28 Heptacarpus spp. 0.4 0.4 0.4 0.2 0.35 0.10 Mopafia spp. 0.2 0.4 0.2 0.4 0.30 0.12 (table continued)

p. ESLO2023-004 C-38

Appendix C - Intertidal Algae, Invertebrates and Substrates Table C18 (continued). Intertidal algae, sessile invertebrates, and substrates (percent cover) and motile invertebrates (abundance per 1.0 m2) survey means, standard deviations and 2022 annual means for South Diablo Cove Station SDC l+0.6m (10+2).

/ , .20s:. '.

. 02:i::ibi22i

209" . 2w*

• . 1ll,~pr-~f

• H-'~ug;2?,.

ricion. - - - , - ~'\' - :"~

Mean, **Mean'*** .!*Mean .

Invertebrate Counts (continued)

Pelecypoda boring 0.4 0.4 0.2 0.2 0.30 0.12 Pollicipes po/ymerus 0.2 0.2 0.2 0.4 0.25 0.10 Anthop/eura artemisia 0.4 0.4 0.20 0.23 Cirratulidae!Terebellidae 0.4 0.2 0.2 0.20 0.16 Diopatra ornata 0.8 0.20 0.40 Lottia ochracea 0.4 0.2 0.2 0.20 0.16

• Ophiactis simplex 0.4 0.2 0.15 0.19 Epitonium/Opalia spp. 0.2 0.2 0.10 0. 12 lschnochitonidae 0.2 0.2 0.10 0.12 Littorina spp. 0.4 0.10 0.20 Ocinebrina spp. 0.4 0.10 0.20 Pseudochama spp. 0.2 0.2 0.10 0.12 Serpulidae 0.2 0.2 0.10 0.12 Epiactis prolifera 0,2 0.05 0.10 Grapsidae 0.2 0.05 0.10 Kelletia kelletii 0.2 0.05 0.10 Ussothuria nutriens 0.2 0.05 0.10 Lott/a scutum 0.2 0.05 0.10 Mitra idae 0.2 0.05 0.10 Ophiopteris papillosa 0.2 0.05 0.10 Ophiothrix spiculata 0.2 0.05 0.10 Pisaster ochraceus 0.2 0.05 0.10 Pteropurpura festiva 0,2 0.05 0.10 Pugettia spp. 0.2 0.05 0.10 Sipuncula 0.2 0.05 0.10 Invertebrate Cover Chthamalus fissus 2.9 10.2 13.1 0.8 6.77 5.84 Phragmatopoma califomica 2.0 0.1 0.6 3,7 1.60 1.60 Pista spp. <0.1 <0.1 0.1 0.06 0.07 Spirorbidae <0.1 <0.1 <0.1 <0.01 <0.01 Bryozoa (encrusting) <0.1 <0.1 <0.01 <0.01 Hydroidolina <0,1 <0.01 <0.01 Porifera (encrusting) <0.1 <0.01 <0.01 Sa/macina tribranchiata <0.1 <0.01 <0.01 Substrates Cover rock 36.2 22.6 22.4 41.6 .30.69 9.75 cobble 11.3 10.6 6.0 6.0 8.49 2.84 sand (shell gravel) 1.3 0.8 3.1 2.7 1.98 1.07 C' ESLO2023-0CM C-39

Appendix C Intertidal Algae, Invertebrates and Substrates Table Cl9. Intertidal algae, sessile invertebrates, and substrates (percent cover) and motile invertebrates (abundance per 1.0 m 2) survey means, standard deviations and 2022 annual means for South Diablo Cove Station SDC 2+0.3m (11 + 1).

Survey 208 209 .210 211 Survey Date 03-Feb-22 17*May-22 07-Sep-22 27-Oct-22 Annual Annual Taxon Mean Mean Mean Mean Mean Std. Dev.

Algae Cover non-coralline crust 29.7 29.5 31.6 46.1 34.24 7.97 coralline crust 9.0 13.0 10.9 5.1 9.50 3.34 juv. articulated coralline algae 3.2 1.5 1.9 0,8 1.82 1.02 Corallina vancouveriensis 1.2 1.4 2.5 2.2 1.81 0.62 Ge/idium ooulteri <0.1 0.1 0.2 0.4 0.21 0,15 Chrysophyta - 0.6 - 0.16 0.31 Calliarthron!Bossiella spp. -complex <0.1 - <0.1 - 0.02 0.03 Gelidium pusillum <0.1 <0.1 <0.1 <0.1 0.01 <0.01 Mastocarpus papillatus <0.1 <0.1 <0.1 <0.1 0.01 <0.01 C/adophora spp. <0.1 <0.1 <0.1 <0.01 <0.01 Chlorophyta (filamentous) <0.1 - <0.1 <0.1 <0.01 <0.01 Prionitis spp. - <0.1 - <0.01 <0,01 filamentous red algae complex - - <0.1 <0.01 <0.01 Ulvaspp, - - <0.1 - <0.01 <0.01 Colpomenia spp. - <0.1 - <0.01 <0.01 Invertebrate Counts Chlorostoma funebralis 221.2 181.8 167.2 60.6 157.70 68,63 Lottia scabra 42.2 40.0 123.8 39.0 61.25 41.72 Anthop/eura elegantissima 28.8 34.6 51.6 28.6 35.90 10.83 Strongylooentrotus purpuratus 17.8 25.8 22.8 14.6 20.25 5.01 Lottia Jimatula 3.4 6.4 12.0 4.2 6.50 3.88 Lottia pelta 3,0 2.6 9.4 9.2 6.05 3.76 Serpu/orbis squamigerus 6.2 5.2 0,6 0.4 3.10 3.03 Mytilusspp. 3.4 5.6 0.6 2.6 3.05 2.07 Fissure/la volcano 1.0 1.8 2.2 0.4 1.35 0.81 Lottiidae 1.2 1.6 1.2 1.2 1.30 0.20 Pelecypoda boring 0.2 2.4 1.0 - 0.90 1.09 Pagurus spp. 0.2 1.0 0.4 0.6 0.55 0.34 Tetrac/ita rubescens 0.4 1.6 - - 0.50 0.76 Anthopleura artemisia 0.4 0.4 1.0 - 0.45 0.41 Mopa/iaspp. - - 1.2 0.4 0.40 0.57 Pachygrapsus crassipes 0.2 0.8 0.6 - 0.40 0.37 Cyanoplax spp. - 0.2 1.0 - 0.30 0.48 Aoanthinucella spp. 0.4 - 0.4 0.2 0.25 0.19 Cirratulidaefferebellidae 0,2 - 0,8 0.25 0.38 Nemertea 0.2 0.2 0.4 0.20 0.16 Ocinebrina spp. - - 0.6 0,2 0.20 0.28 Nereididae 0,2 0.2 0.2 0.15 0.10 Acmaea mitra 0.2 - 0.2 - 0.10 0.12 Epiactis prolifera - 0.4 - 0.10 0.20 Littorina spp. 0.4 - - 0.10 0.20 Pol/ioipes po/ymerus 0.2 - - 0.2 0.10 0.12 Sabellidae - - 0.4 0.10 0,20 Barleeia spp. - 0.2 0.05 0.10 Diopatra omata 0,2 - - 0.05 0.10 Epitonium!Opalia spp. - 0.2 - - 0.05 0.10 (table continued)

C' ESL02023-004 G-40

Appendix C Intertidal Algae, Invertebrates and Substrates Table Cl9 (continued). Intertidal algae, sessile invertebrates, and substrates (percent cover) and motile invertebrates (abundance per LO m 2) survey means, standard deviations and 2022 annual means, for South Diablo Cove Station SDC 2+0.3m (11 + 1).

" Survey i" 208 .. .209

• 210 211; . *;*.'

Survey Date 03-Feb-22 17*May~22 07-Se~~22 ~1;od-22* * '. Annual Annual

. Taxon Mean Mean Mean Mean . Mean Std. Dev.

Invertebrate Counts (continued)

Grapsidae 0.2 - . - 0.05 0.10 lschnochitonidae 0.2 - - 0.05 0.10 Lottia ochracea - - 0.2 . 0.05 0.10 Ophiactis simplex 0,2 - - 0.05 0.10 Pferopurpura festive 0,2 - . . 0.05 0.10 Serpulidae 0,2 . - 0.05 0.10 Sipuncula - 0.2 - 0.05 0.10 Invertebrate Cover Chthamalus fissus 0,2 1.3 4.7 0.6 1.71 2.06 Phragmatopoma californica <0.1 0.2 <0.1 <0.1 0.07 0.10 Bryozoa (encrusting) 0.1 - - . 0.03 0,07 Spirorbidae <0.1 - <0.1 - <0.01 <0,01 Substrate Cover rock 49.6 48.0 41.0 39.9 44.62 4.88 sand (shell gravel) 3.1 1.5 3.3 2.4 2.55 0.81 cobble 1.0 2.8 4.3 1.3 2.34 1.52 C' ESLO2023-004 C-41

Appendix C - Intertidal Algae, Invertebrates and Substrates Table C20. Intertidal algae, sessile invertebrates, and substrates (percent cover) and motile invertebrates (abundance per 1.0 m2) survey means, standard deviations and 2022 annual means for South Diablo Cove Station SDC 2+0.9m (11 +3).

Survey 208 209 210 211 Survey Date 03-Feb-22 17-May-22 07-Sep-22 27-Oct-22 Annual Annual Taxon Mean Mean Mean Mean Mean Std. Dev.

Algae Cover non-coralline crust 29.7 27.4 30.3 29.0 29.10 1.28 Corallina vancouveriensis 1.4 1.9 2.2 0.8 1.60 0.62 coralline crust 1.5 1.3 1.3 0.6 1.17 0.38 Ge/idium coulteri 0.1 <0.1 0.8 0.1 0.28 0.32 juv. articulated coralline algae 0.4 0.1 0.3 <0.1 0.21 0.13 Mastocarpus papilla/us <0.1 <0.1 <0.1 <0.1 0.04 0.04 Gelidium pusillum <0.1 <0.1 <0.1 <0.1 0.02 0.04 filamentous red algae complex . - <0.1 - 0.02 0.04 C/adophora spp. <0.1 <0.1 <0.1 <0.1 0.01 <0.01 Prionitis spp. <0.1 - <0.1 - <0.01 <0.01 Gastroclonium subarticu/atum <0.1 - - - <0.01 <0.01 Mazzael/a leptorhynchos - - <0.1 - <0.01 <0.01 Invertebrate Counts Chlorostoma funebralis 258.6 218.4 300.2 186.8 241.00 49.20 Anthop/eura e/egantissima 64.2 104.0 134.8 97.8 100.20 28.94 Lottia scabra 30.4 76.2 64.0 156.2 81.70 53.31 Lottia limatula 4.6 6.6 13.0 9.0 8.30 3.61 Lottia pe/ta 3.2 2.2 6.8 3.8 4.00 1.98 Pagurus spp. 3.2 - 2.6 7.8 3.40 3.25 Acanthinucella spp. 5.6 1.4 3.4 2.8 3.30 1.75 Myti/usspp. - 2.0 0.2 9.4 2.90 4.43 Lottiidae 1.0 2.2 1.8 1.4 1.60 0.52 Pachygrapsus crassipes 1.0 0.2 1.4 0.2 0.70 0.60 Strongy/ocentrotus purpuratus 1.0 0.4 1.0 0.2 0.65 0.41 Littorina spp. 1.0 0.6 0.2 0.4 0.55 0.34 Lottiascutum 0.2 - 1.6 - 0.45 0.77 Aeo/idia papil/osa - - 0.6 - 0.15 0.30 Ocinebrina spp. - 0.2 - 0.2 0.10 0.12 Pelecypoda boring 0.2 0.2 - - 0.10 0.12 Anthop/eura xanthogrammica - 0.2 - - 0.05 0.10 Homo/opoma /uridum!Lirularia succincta - - - 0.2 0.05 0.10 Mopa/iaspp. 0.2 - - - 0.05 0.10 Nemertea . 0.2 - - 0.05 0.10 Ophiactis simplex - - 0.2 - 0.05 0.10 Serpulidae 0.2 - - - 0.05 0.10 Williamia peltoides 0.2 - - - 0.05 0.10 Invertebrate Cover Chthamalus fissus 4.3 2.8 9.4 3.7 5.05 2.94 Phragmatopoma californica <0.1 <0.1 - - <0.01 <0.01 Substrate Cover rock 57.8 59.0 44.0 55.5 54.08 6.86 sand (shell gravel) 3.3 3.1 8.4 4.3 4.78 2.48 cobble 0.5 0.4 1.4 1.1 0.85 0.48 t' ESLO2023-004 C-42

Appendix C - Intertidal Algae, Invertebrates and Substrates Table C21. Intertidal algae, sessile invertebrates, and substrates (percent cover) and motile invertebrates (abundance per 1.0 m2) survey means, standard deviations and 2022 annual means for South Diablo Cove Station SDC 3+0.3m (12+1).

,, , ~

Survey: ,- ~08 209 210 211 Survey Date 17-Feb-22 03-May-22 06-Sep-22 21-Dec~22 Annual Annual Taxon Mean Mean Mean Mean Mean Std, Dev.

Algae Cover non-coralline crust 24.4 28.1 30.8 28.9 28.06 2.71 coralline crust 0.5 0.2 0.4 <0.1 0.29 0.18 juv. articulated coralline algae 0.1 <0.1 <0.1 <0.1 0.07 0.06 Mastocarpus papilla/us <0.1 <0.1 0.1 <0.1 0.04 O.D?

Gelidium pusillum <0.1 <0.1 <0.1 <0.1 0.01 <0.01 Cladophora spp. . <0.1 <0.1 <0.1 <0.01 <0.01 filamentous red algae complex . . <0.1 . <0.01 <0.01 Gelidium coulteri . <0.1 <0.1 . <0.01 <0.01 Corallina vancouveriensis <0.1 . . . <0.01 <0.01 Calliarthron!Bossiella spp.-complex <0.1 . . . <0.01 <0.01 Chlorophyta (filamentous) <0.1 . . . <0.01 <0.01 Endocladia muricata . <0.1 . . <0.01 <0.01 Gastroclonium subarticulatum . . <0.1 . <0.01 <0.01 Invertebrate Counts Chlorostoma funebralis 265.6 142.0 238.6 153.0 199.80 61.55 Myti/usspp. 42.4 27.0 43.8 32.2 36.35 8.10 Lottia scabra 35.0 30.8 26.2 28.4 30.10 3.77 Anthopleura elegantissima 17.8 19.8 25.2 20.2 20.75 3.15 Lottia limatula 22.0 17.8 19.4 12.0 17.80 4.24 Lottia pelta 2.8 2.8 8.2 3.0 4.20 2.67 Strongylocentrotus purpuratus 0.6 0.6 11.2 2.6 3.75 5.06 Pagurus spp. 2.8 . . 2.4 1.30 1.51 Ocinebrina spp. 0.4 1.0 1.4 2.2 1.25 0.75 Lottia scutum . 0.2 1.2 2.4 0.95 1.10 Lotliidae 0.4 0.4 0.8 1.2 0.70 0.38 Serpulorbis squamigerus 1.0 0.4 0.2 1.0 0.65 0.41 Tetraclita rubescens 0.2 1.0 0.6 0.8 0.65 0.34 Pachygrapsus crassipes . 0.2 1.2 0.6 0.50 0.53 Pelecypoda boring . 1.4 0.2 0.2 0.45 0.64 CirratulidaefTerebellidae . . 0.8 0.8 0.40 0.46 Acanthinucella spp. . 0.4 . 1.0 0.35 0.47 Fissure/la volcano 0.4 . 1.0 . 0.35 0.47 Li/farina spp. 0.6 . . . 0.15 0.30 Cyanoplax spp. . . 0.4 . 0.10 0.20 Anthopleura artemisia . . . 0.2 0.05 0.10 Ganus californicus 0.2 . . . 0.05 0.10 Diplodonta orbella 0.2 . . . 0.05 0.10 Epiactis prolifera . 0.2 . . 0.05 0.10 Epitonium!Opalia spp. 0.2 . . . 0.05 0.10 Hemigrapsus nudus . . 0.2 . 0.05 0.10 Lottia ochracea . . 0.2 . 0.05 0.10 Lysmata californica 0.2 . . . 0.05 0.10 Mitraidae . 0.2 . . 0.05 0.10 Mopa/iaspp. 0.2 . . . 0.05 0.10 Nemertea . . 0.2 . 0.05 0.10 Patiria miniata . . . 0.2 0.05 0.10 (table continued) t' ESLO2023-004 C-43

Appendix C - Intertidal Algae, Invertebrates and Substrates Table C21 (continued). Intertidal algae, sessile invertebrates, and substrates (percent cover) and motile invertebrates (abundance per 1.0 m2) survey means, standard deviations and 2022 annual means for South Diablo Cove Station SDC 3+0.3m (12+1).

Survey 208 209 210 211 Survey Date 17-Feb-22 03-May-22 06-Sep-22 21-Dec-22 Annual Annual Taxon Mean Mean Mean Mean Mean Std. Dev.

Invertebrate Counts (continued)

Poflicipes po/ymerus 0.2 - - 0.05 0.10 Serpulidae - 0.2 0.05 0.10 Sipuncula - 0.2 - 0.05 0.10 Williamia peltoides - - 0.2 - 0.05 0.10 Invertebrate Cover Chthamalus fissus 0.8 2.4 1.2 0.6 1.24 0.79 Phragmatopoma califomica <0.1 <0.1 <0.1 <0.1 0.02 0.03 Spirorbidae <0.1 <0.1 <0.1 <0.1 0.01 <0.01 Pista spp. - - <0.1 <0.01 <0.01 Substrate Cover rock 51.2 47.0 33.2 35.7 41.77 8.69 cobble 14.7 13.5 19.0 27.2 18.61 6.19 sand (shell gravel) 3.8 5.4 11.6 4.3 6.27 3.62 t' ESLO2023-004 C-44

Appendix C - Intertidal Algae, Invertebrates and Substrates Table C22. Intertidal algae, sessile invertebrates, and substrates (percent cover) and motile invertebrates (abundance per 1.0 m 2) survey means, standard deviations and 2022 annual means for South Diablo Cove Station SDC 3+0.9m (12+3).

Survey 208 21_0 211 . ;

~119 Survey Date 17-Feb-22 03~May-22 06-SeP,.-22 29-Nov-22 Annual A.nnual Taxon Mean .. Mean Mean* Mean'

• Mean Std. Dev.

Algae Cover non-coralline crust 30.8 23.9 28.0 31.0 28.42 3.32 coralline crust <0.1 <0.1 0.2 0.2 0.11 0.12 Mastocarpus papilla/us <0.1 <0.1 <0.1 <0.1 0.04 0.04 juv. articulated coralline algae - <0.1 <0.1 0.1 0.04 0.07 Gelidium pusillum <0.1 <0.1 <0.1 <0.1 0.01 <0.01 Cladophora spp. - <0.1 <0.1 <0.1 <0.01 <0.01 Gelidium coulteri <0.1 - <0.1 - <0.01 <0.01 Cora/lina vancouveriensis <0.1 <0.1 - - <0.01 <0.01 Invertebrate Counts Ch/orostoma funebralis 116.6 69.8 326.0 101.6 153.50 116.64 Lottia scabra 22.8 21.6 86.2 31.4 40.50 30.78 Anthop!eura e/egantissima 32.8 28.6 53.6 45.2 40.05 11.46 Myli/usspp. 39.6 17.0 19.8 18.4 23.70 10.66 Lottia limatula 5.2 4.4 13.0 3.6 6.55 4.35 Lottia pelta 3.6 0.4 4.6 2.4 2.75 1.81 Ocinebrina spp. 1.4 2.0 2.4 2.4 2.05 0.47 Lottiidae 0.4 2.0 0.8 1.0 1.05 0.68 Cirratulidae/Terebellidae 0.2 - 2.2 1.0 0.85 1.00 Pagurus spp. 0.8 0.4 0.2 1.6 0.75 0.62 Pachygrapsus crassipes - - 1.6 0.8 0.60 0.77 Acanthinucel/a spp. 0.4 0.8 t'o 0.2 0.60 0.37 Littorina spp. 0.8 1.0 0.2 0.2 0.55 0.41 Cyanop!ax spp. - 0.2 0.8 0.6 0.40 0.37 Mopa/iaspp. 0.2 - 0.4 0.6 0.30 0.26 Tetraclita rubescens - 0.6 - - 0.15 0.30 Epitonium!Opalia spp. - 0.2 0.2 - 0.10 0.12 Pollicipes po/ymerus - 0.4 - - 0.10 0.20 Anthop/eura artemisia 0.2 - - - 0.05 0.10 Diopatra omata - - 0.2 - 0.05 0. 10 Lottia ochracea - - 0.2 - 0.05 0.10 Lottia scutum - 0.2 - - 0.05 0.10 Nereididae - - - 0.2 0.05 0.10 Pelecypoda boring - - 0.2 - 0.05 0.10 Invertebrate Cover Chthama/us fissus 1.0 2.5 2.8 1.0 1.83 0.99 Phragmatopoma califomica <0.1 <0.1 <0.1 <0.1 0.02 0.03 Spirorbidae <0.1 <0.1 <0.1 <0.1 <0.01 <0.01 Substrate Cover rock 36.9 50.3 36.9 36.7 40.21 6.76 cobble 17.9 12.3 15.3 25.2 17.67 5.52 sand (shell gravel} 10.1 9.5 15.3 2.6 9.38 5.22 t' ESLO2023-004 C-45

Appendix C Intertidal Algae, Invertebrates and Substrates Table C23. Intertidal algae, sessile invertebrates, and substrates (percent cover) and motile invertebrates (abundance per LO m 2) survey means, standard deviations and 2022 annual means for South Diablo Point Station SDP 1+0.9m (22+3).

Survey Survey Date 208 20-Jan"22 209 30-Jun-22 r 210 27-Jul-22.

211 10-Nov-22 Annual Annual Taxon Mean Mean . Mean Mean Mean Std. Dev.

Algae Cover non-coralline crust 26.5 37.3 23.3 45.5 33.12 10.20 coralline crust 6.0 2.6 2.6 4.7 3.96 1.65 juv. articulated coralline algae 0.5 1.2 0.4 1.7 0.96 0.62 Gelidium coulteri <0.1 <0.1 <0.1 0.2 0.08 0.10 Cora/Jina vancouveriensis <0.1 <0.1 <0.1 - 0.02 0.04 Gelidium pusillum <0.1 <0.1 <0.1 <0.01 <0,01 Mastocarpus papillatu~ <0.1 <0.1 <0.1 - <0.01 <0.01 U/vaspp. - <0.1 <0.1 <0.1 <0.01 <0.01 C/adophora spp. - <0.1 - <0.01 <0.01 Chrysophyta <0.1 - - - <0.01 <0.01 Cal/iarthron!Bossiella spp.-complex <0.1 <0.1 <0.1 <0.01 <0.01 Chlorophyta (filamento,us) <0.1 <0.1 - <0.01 <0.01 Codium fragile subsp. californicum - - <0.1 <0.01 <0.01 filamentous red algae complex - <0.1 - <0.01 <0.01 Ha/osaccion americanum <0.1 - <0.01 <0.01 Mazzaella /eptorhynchos - - <0.1 <0.01 <0.01 Invertebrate Counts .

Myti/us spp. 933.6 695.4 743.8 606.2 744.75 138.20 Lottiascabra 83.6 71.2 66.0 70.6 72.85 7.53 Ba/anus spp. 131.8 44.0 37.0 30.4 60.80 47.66 Tefraclita rubescens 39.0 25.8 28.8 17.8 27.85 8.76 Lottiape/ta 14.2 36.4 13.8 28.2 23.15 11.08 Anthop/eura elegantissima 27.8 12.2 12.6 24.6 19.30 8.08 Lotfia gigantea 19.8 5.6 5.4 6.2 9.25 7.04 Strongylocentrotus purpuratus 12.2 3.0 4.8 9.0 7.25 4.15 Chlorostoma funebralis 11.6 2.4 1.2 12.0 6.80 5.80 Lotfia limatula 4.6 5.2 7.8 2.2 4.95 2.30 Pollicipes polymerus 3.8 2.6 4.2 3.0 3.40 0.73 Nuttallina californica 4.6 1.0 2.2 3.0 2.70 1.51 Anthopleura xanthogrammica 1.4 2.0 1.4 2.8 1.90 0.66 Fissurella volcano 2.0 0.2 0.8 2.8 1.45 1.17 Lotliidae 2.4 1.0 1.0 1.0 1.35 0.70 Ocinebrina spp. 1.6 - 0.8 3.0 1.35 1.28 Nuce/la spp. 2.2 0.8 0.6 0.8 1.10 0.74 Cyanoplax spp. 2.2 - 1.0 0.80 1.05 Sipuncula 0.8 0.2 1.4 0.6 0.75 0.50 Lottia ochracea 0.4 0.6 0.4 - 0.35 0.25 Nemertea 0,8 0.2 0.2 - 0.30 0,35 Ch/orostoma brunnea 0.6 - - 0.4 0.25 0.30 Pachygrapsus crassipes - 0.8 0.2 0.25 0.38 Serpulidae - 0.4 0.4 0.20 0.23 Acmaea mitra 0.2 - 0.4 0.15 0.19 Grapsidae - 0.6 0.15 0.30 Anthopleura artemisia 0.2 0.2 0.10 0.12 Lottia scutum - - 0.4 0.10 0.20 Homolopoma luridum/Urularia succincta 0.2 - - 0.05 0.10 (table continued) t' ESLO2023-004 C-46

Appendix C - Intertidal Algae, Invertebrates and Substrates Table C23 (continued). Intertidal algae, sessile invertebrates, and substrates (percent cover) and motile invertebrates (abundance per 1.0 m 2) survey means, standard deviations and 2022 annual means for South Diablo Point Station SDP 1+0.9m (22+3).

Survey ... 20s* ,.*

.. 209::* *. 7,, 2~Q

• ' ~:21f ...

,, ' ~4rv,;iy Ditt~ . 20-J~~"72**

• 30,_Juh-2,2 : : 27*iul 722 10-Nov-2? An11uaL , *Arirfua.l std. Dev.'

~

Mean.

~

"/*

Taxoh .. ,. .Mea:n.

• Mean,:*;i "Mean' Mean, Invertebrate Counts (continued)

Lissothuria nutriens . . . 0.2 0.05 0.10 Lottia insessa . . 0.2 . 0.05 0.10 Modio/us spp. 0.2 . . . 0.05 0.10 Pelecypoda boring . . . 0.2 0.05 0,10 Ha/iotis spp. 0.1 . . . .0.03 0.05 Invertebrate Cover Phragmatopoma califomica 1.0 0.6 0.6 ' 1.7 0.99 0.49 Chthama/us fissus <0.1 0.4 1.7 <0.1 0.54 0.82 Dodecaceria fewkesi 0.3 <0.1 0.1 0.2 0.18 0.15 Spirorbidae <0.1 . . . <0.01 <0.01 Bryozoa (encrusting) <0.1 . . . . <0.01 <0.01 Porifera (encrusting) . <0.1 . . <0.01 * <0.01 Sa/macina tribranchiata . . <0.1 . <0.01 <0.01 tunicates, compound/social <0.1 . . . <0.01 <0.01 Substrate Cover rock 18.8 8.9 18.6 5.7 13.00 6.72 cobble . . 0.3 . 0.09 0.17 sand (shell gravel) . <0.1 . . 0.02 0.03 f

~ ESLO2023--004 C-47

Appendix C Intertidal Algae, Invertebrates and Substrates Table C24. Intertidal algae, sessile .invertebrates, and substrates (percent cover) and motile invertebrates (abundance per 1.0 m2) survey means, standard deviations and 2022 annual means for South Diablo Point Station SDP 2+0.9m (14+3).

Survey 208. 209. .i10* 211 Survey Date 06,Jan-22 21-Apr-22 13-Jul-22 28-0cf-22 Annual An_riLia!

Taxon Mean Mean Mean Mean Mean Std. Dev.

Algae Cover coralline crust 18.1 8.3 10.3 4.9 10.40 5.58 juv. articulated coralline algae 6.3 1.8 2.2 2.1 3.07 2.12 non-coralline crust 1.2 1.7 1.4 2.8 1.76 0.71 Corallina vancouveriensis 3.1 0.3 0.4 1.1 1.23 1.31 Galliarthron/Bossiella spp.-complex 2.3 0.5 1.4 0.6 1.18 0.85 Chrysophyta 2.0 <0.1 0.3 0.57 0.97 Gelidium pusillum - - 1.4 - 0.35 0.70 Gelid/um cou/teri - <0.1 <0.1 0.6 0.14 0.28 Microcladia coulteri - <0.1 0.4 0.11 0.17 Cryptop/eura violacea - <0.1 <0.1 0.3 0.07 0.14 Ca/lithamnion spp.lP/eonosporium spp. - 0.3 - 0.07 0.14 Codium fragile subsp. californicum <0.1 - <0.1 - 0.02 0.03 filamentous red algae complex <0.1 <0.1 <0.1 <0:01 <0.01 Prionitis spp. - <0.1 <0.1 <0.1 <0.01 <0.01 Mastocarpus papillatus - <0.1 <0.1 <0.1 <0.01 <0.01 Chlorophyta (filamentous) - - <0.1 - <0.01 <0.01 Mazzaella affinis - - <0.1 <0.1 <0.01 <0.01 Callithamnion pikeanum - <0.1 - <0.01 <0.01 Microcladia borealis - <0.1 - <0.01 <0.01 Phaeophyta - <0.1 <0.01 <0.01 Plocamium violaceum - <0.1 - <0.01 <0.01 Bryopsis spp. - - <0.1 - <0.01 <0.01 Chondracanthus canalicu/atus <0.1 - - <0.01 <0.01 Chondracanthus corymbiferus - - <0.1 <0.01 <0.01 Corallina chilensis <0.1 - - <0.01 <0.01 Endarachne/Peta/onia spp. -complex <0.1 - <0.01 <0,01 Plocamium pacificum - <0.1 - <0;01 <0.01 Ufvaspp. - - <0.1 - <0.01 <0.01 Invertebrate Counts Myti/usspp. 671.4 823.2 716.6 863.6 768.70 89.74 Ba/anus spp. 76.0 61.4 19.0 80.6 59.25 28.05 Anthopteura e/egantissima 43.8 36.6 83.4 16.2 45.00 28.14 Strongylocentrotus purpuratus 38.4 19.6 20.2 16.2 23.60 10.02 Lottie pelta 11.0 24.0 0.6 31.8 16.85 13.82 Tetraclita rubescens 10.0 18.4 12.8 6.0 11.80 5.21 Lottiascabra 11.0 5.8 8.4 4.6 7.45 2.85 Chlorostoma funebra/is 17.2 1.4 4.4 4.0 6.75 7.09 Pollicipes polymerus 7.6 8.2 1.0 8.4 6.30 3.55 Nuttaflina cafifomica 9.0 3.0 5.8 2.4 5.05 3.02 Chlorostoma brunnea 1.6 - 11.4 - 3.25 5.49 Lottia limatu/a 4.6 2.2 3,8 2.4 3.25 1.15 Nuce/fa spp. 4,8 1.4 2.4 1.4 2.50 1.60 Pachygrapsus crassipes 1.6 0.6 3.6 3.6 2.35 1.50 Serpulidae 2.8 1.0 2.6 1.0 1.85 0.98 Anthop/eura xanthogrammica 4.4 0.8 0.8 0.8 1.70 1.80 Fissure/la volcano 1.6 - 3.0 0.8 1.35 1.28 (table continued) t' ESLO2023-004 C-48

AppendixC lnterti9al Algae, Invertebrates and Substrates Table C24 (continued). Intertidal algae, sessile invertebrates, and substrates (percent cover) and motile invertebrates (abundance per 1.0 m 2) survey means, standard deviations and 2022 annual means for South Diablo Point Station SDP 2+0.9m 14+3.

20!> ,io9 ,r * 'ito.::..

os-Jin~2i ,, *21~Apt-i2 . J~~;~~22r~ , )\11nu!1F

Jaxon .

Mean **. ; ., 'Mean, ** ,Stct'.Dev

• lnvertebr~te Counts (continued)

Lottia gigantea 0.2 1.4 0.6 2.4 1.15 0.97 Lottiidae 1.0 1.0 1.0 1.0 1.00 <0.01 Leptasterias spp. 0.4 0.2 1.0 1.2 0.70 0.48

• Pelecypoda boring 0.8 0.6 0,8 0.2 0.60 0.28 Sipuncula 0.6 0.6 0.6 0.45 0.30 Acmaea mitra 0.2 0.4 0.4 0.4 0.35 0.10 Tonicella lineata 0,6 0.4 0.2 0.30 0.26 Loftia ochracea 0.2 0.4 0.4 0.25 0.19 Nemertea 0,2 0.6 0.20 0.28 Ophiothrix spiculata 0.4 0.2 0.15 0.19 Amphissa spp. 0.2 0.2 0.10 0.12 Elysia hedgpethi 0,4 0.10 0.20 Grapsidae 0.4 0.10 0.20 Calliostoma ligatum 0.2 0.05 0.10 Cirratulidaerrerebellidae 0.2 0.05 0.10 Cnemidocarpa finmerkiensis 0.2 0.05 0.10 Diodora spp. 0.2 0.05 0.10 Haliofis spp. 0.2 0.05 0.10 lschnochitonidae 0.2 0.05 0.10 Lottie insesse 0.2 0.05 0.10 Lottie scutum 0.2 0.05 0.10 Mitraidae 0.2 0.05 0.10 Madia/us spp. 0.2 0.05 0.10 Mope/iaspp. 0.2 0.05 0.10 Sabellidae 0.2 0.05 0.10 Septifer bifurcatus 0.2 0.05 0.10 Invertebrate Cover Chthemelus fissus 0.9 0.8 1.7 0.7 1.01 0.45 Dodecacerie fewkesi 0.1 0.2 0.1 <0.1 0.14 0.06 Phragmatopoma califomica 0,2 <0.1 0.2 <0.1 0.13 0.11 Porifera (encrusting) <0.1 <0.1 <0.1 <0.1 <0.01 <0.01 Spirorbidae <0.1 <0.1 <0.1 <M1 <0.01 Salmacina tribranchiata <0.1 <0.1 <0.01 <0.01 Bryozoa (encrusting) <0.1 <0.1 <0:1 <0.01 <0.01 tunicates, compound/social <0.1 <0.1 <0.1 <0.01 <0.01 Aglaophenia spp. <0.1 <0.01 <0.01 Substrate Cover rock 9.2 12.9 10.0 11.4 10.87 1.65 sand (shell gravel) <0.1 <0.01 <0.01 cobble t' ESLO2023-004 C-49

Appendix C Intertidal Algae, Invertebrates and Substrates Table C25. Intertiaal algae, sessile invertebrates, and substrates (percent cover) and motile invertebrates (abundance per 1.0 m2) survey means, standard deviations and 2022 annual means for South Control Station SC 1+0.3m (19+1).

Survey 208 209 210 2.11 '

SurveyD~te, 16-Feb-22 16~Jun-22 * ,,12-Aug-22 os~Nov-22 An~ual Annual T8l(on Mean , Mean Mean Mean Mean Std: Dev.

Algae Cover non-coralline crust 38.3 35.6 24.4 31.9 32.53 6.05 Mazzaella f/accida 4.1 24.1 32.9 6.7 16.94 13.87 Phyl/ospadix spp. 10.0 10.6 11.9 8.4 10.24 1.47 juv. articulated coralline algae 10.4 14.6 5.0 6.5 9.13 4.29 coralline crust 9.9 6.2 9.0 6.9 8.00 1.77 Gelid/um coulteri 1.4 3.8 8.1 5.8 4.78 2.84 Mastocarpus papilla/us 0.3 2.7 5.3 9.4 4.45 3.92 Coralline vancouveriensis 2.8 1.0 3.5 5.5 3.23 1.84 Gastroclonium subarticulatum 2.2 3.9 1.5 3.3 2.71 1.07 Prionitis spp. 2.2 0.8 1.2 3.3 1.86 1.09 Cryptopleura violacea 0.3 0.4 1.5 3.2 1.36 1.33 Smithora naiadum 1.7 3.1 <0.1 1.20 1.51 Mazzaella splendens - 0.9 3.5 1.09 1.64 Chondracanthus canaliculatus 1.1 0.4 0.2 1.1 0.72 0.47 Mazzaella oregona <0.1 <0.1 1.3 0.9 0.56 0.62 Mastocarpus jardinii 0.3 0.6 0.6 0.4 0.47 0.15 Mazzael/a affinis - 0.6 0.4 0.3 0.31 0.23 Egregia menziesii - - 1.1 0.1 0.31 0.54 Cal/iarthron/Bossiel/a spp.-complex 0.1 <0.1 - 0.4 0.12 0.17 Chondracanthus corymbiferus - - - 0.3 0.09 0.17 Microcladia cou/teri - 0.1 0.1 0.07 0.08 Endocladia muricata <0.1 <0.1 <0.1 <0.1 0.05 0.03 Sarcodiotheca gaudichaudii <0.1 - 0.1 <0.1 0.05 0.07 Cryptop/eura ruprechtiana - - - <0.1 0.02 0.03 C/adophora spp. <0.1 <0.1 <0.1 <0.1 <0.01 <0.01 Mazzaella /eptorhynchos <0.1 <0.1 <0.1 <0.1 <0.01 <0.01 Ha/osaccion americanum - <0.1 <0.1 <0.1 <0.01 <0.01 Gelidium pusillum - <0.1 - - <0.01 <0.01 Me/obesia mediocris <0.1 - <0.1 <0.01 <0.01 Cal/ophyl/is spp. <0.1 - - <0.01 <0.01 Colpomenia spp. <0.1 - - <0.01 <0.01 Osmundea spp. - - <0.1 <0.01 <0,01 Porphyra spp. - <0.1 - <0.01 <0.01 U/vaspp. - <0.1 - <0.01 <0.01 Invertebrate Counts Ch/orostoma funebra/is 60.6 110.8 98.2 52.0 80.40 28.52 Strongylocentrotus purpuratus 5.2 20.6 28.0 21.8 18.90 9.69 Lottia limatula 4.2 13.4 17.8 7.4 10.70 6.08 Pagurus spp. 4.2 2.6 11.0 9.4 6.80 4.03 Fissure/la volcano 7.2 3.4 4.6 2.6 4.45 2.01 Lottia scutum 2.4 1.4 3.6 8.8 4.05 3.29 Tetraclila rubescens 5.8 5.4 1.6 - 3.20 2.85 Lottia pelta 0.6 4.2 3.6 2.10 2.11 Lottia scabra 1.4 0.6 5.0 0.6 1.90 2.10 Chlorostoma brunnea 1.0 2.6 2.0 - 1.40 1.14 Serpulidae 1.8 1.4 1.4 0.8 1.35 0.41 (table continued)

C' ESLO2023-004 C-50

AppendixC Intertidal Algae; Invertebrates and Substrates Table C25 (continued). Intertidal algae, sessile invertebrates, and substrates (percent cover) and motile invertebrates (abundance per 1.0 m 2) survey means, standard deviations and 2022 annual means for South Control Station SC 1+0.3m (19+1).

20$* . .. . :*210,' ' ... . 211 . .

T1~-F~b~22 1~.J~n:22' 1i~A.uiP22( Q~fNQVI?2' Mean,. .*,Pidan * . ** IVleafl..:,= *Mean::.

Invertebrate Counts (continued)

Lotliidae 1.2 1.2 1.2 1.6 1.30 0.20 Ocinebrina spp. 1.2 2.6 0.6 0.2 1.15 1.05 Patiria miniata 0.6 1.0 1.6 0.8 1.00 0.43 Mopalia spp. 1.4 0.8 0.4 0.6 0.80 0.43 Nemertea 1.0 1.8 0.2 0.75 0.82 Anthopleura e/egantissima 1.8 0.2 0.4 0.2 0.65 0.77 Crepidula spp. 0.6 0.4 0.8 0.4. 0.55 0.19 Pachygrapsus crassipes 0.4 0.4 0.6 0.2 0.40 0.16 Acmaea mitra 0.8 0.2 0.4 0.35 0.34 Ba/anus spp. 0.8 0.20 0.40 Calliostoma ligatum 0.4 0.2 0.15 0.19 lschnochitonidae 0.2 0.2 0.2 0.15 0.10 Leptasterias spp. 0.2 0.2 0.2 0.15 0.10 Myti/us spp. 0.2 0.4 0.15 0.19 Clavelina huntsmani 0.2 0.2 0.10 0.12 Grapsidae 0.4 0.10 0.20 Lacuna spp. 0.2 0.2 0.10 0.12 Lottia ochracea 0.2 0.2 0.10 0.12 Nu/ta/Jina cafifomica 0.2 0.2 0.10 0.12 Stenop/ax spp. 0.2 0.2 0.10 0.12 Tonicella lineata 0.4 0.10 0.20 Amphissa spp. 0.2 . 0.05 0.10 Anthopleura xanthogrammica 0.2 0.05 0.10 Hemigrapsus nudus 0.2 0.05 0.10 Homolopoma luridum!Urularia succincta 0.2 0.05 0.10 Mitra idae 0.2 0.05 0.10 Nereididae 0.2 0.05 0.10 Pelecypoda boring 0.2 0.05 0.10 Pugettia spp. 0.2 0.05 0.10 Serpu/orbis squamigerus 0.2 0.05 0.10 Stye/a spp. 0.2 0.05 0.10 Urticina spp. 0.2 0.05 0.10 Williamia peffoides 0.2 0.05 0.10 Invertebrate Cover Phragmatopoma califomic_a 11.0 1.5 2.1 4.4 4.76 4.38 Pis/a spp. 0.5 <0.1 <0.1 0.5 0.26 0.26 tunicates, compound/social <0.1 <0.1 <0.1 0.02 0.04 Spirorbidae <0.1 <0.1 <0.1 <0.1 0.01 <0.01 Bryozoa (encrusting) <0.1 <0.1 <0.1 <0.1 0.01 <0.01 Chthama/us fissus <0.1 <0.1 <0.1 <0.1 <0.01 <0.01 Porifera (encrusting) <0.1 <0.1 <0.1 <0.01 <0.01 Substrate Cover rock 11.9 23.1 21.2 10.6

• 16.74 6.36 cobble 3.5

• 3.6 5.1 6.4 4.64 1.37 sand (shell gravel) 3.9 2.6 4.2 4.9 3.93 0.96 (table continued)

C' ESL02023-004 C-51

Appendix C Intertidal Algae, Invertebrates and Substrates Table C26. Intertidal algae, sessile invertebrates, and substrates (percent cover) and motile invertebrates (abundance per 1.0 m 2) survey means, standard deviations and 2022 annual means for South Control Station SC 1+0.9m (19+3).

Survey 208 209 210 211 Survey Date 16-Feb-22 16-Jun-22 12-Aug-22 09-Nov-22 Annual Annual Taxon Mean Mean Mean Mean Mean Std. Dev.

Algae Cover non-coralline crust 43.8 32.4 30.2 32.9 34.84 6.10 Endocladia muricata 8.3 10.5 9.4 8.1 9.05 1.12 Si/vetia compressa 5,8 2.6 3.7 4.3 4.10 1.36 Mastocarpus papi/latus 1.9 2.7 6.3 3.4 3.56 1.90 Mastocarpus jardinii 1.9 1.5 2.2 4.4 2.52 1.31 coralline crust 2.2 0.9 1.7 2.2 1.77 0.62 Mazzael/a flaccida 0.5 0.5 0.8 0.8 0.65 0.18 Mazzaella splendens - - 0.1 <0.1 0.05 0.07 juv. articulated coralline algae <0.1 <0.1 <0.1 0.1 0.04 0.07 Mazzaella oregona - <0.1 <0.1 0.04 0.04 Gelidium pusillum <0.1 <0.1 <0.1 <0.1 0.01 <0,01 C/adophora spp. <0.1 <0.1 <0.1 <0.1 <0.01 <0.01 Gelidium coulteri - - <0.1 <0.01 <0.01 Mazzaef/a affinis <0.1 - - <0.01 <0.01 Invertebrate Counts Lottia scabra 36.4 40.0 132.8 98.4 76.90 46.86 Chlorostoma funebralis 33.2 56.0 118.4 88.2 73.95 37.25 Lottie limatula 4.0 17.0 20.8 16.0 14.45 7.27 Ocinebrina spp. 2.0 11.6 7.8 3.6 6.25 4.32 Lottia scutum 6.2 0.6 3.6 5.4 3.95 2.48 Anthopleura e/egantissima 6.0 3.0 3.2 3.4 3.90 1.41 Myti/us spp. 6.0 2.0 3.2 1.4 3.15 2.04 Lottia pelta 0.8 2.0 2.8 2.4 2.00 0.86 Pachygrapsus crassipes 0.4 0.8 2.4 1.4 1.25 0.87 Lottiidae 0.6 1.0 1.0 1.6 1.05 0.41 Cyanoplax spp. - 0.4 1.2 0.4 0.50 0.50 Acanthinuce/la spp. 0.8 0.4 0.2 0.2 0.40 0.28 Tetraclita rubescens 0.4 0.6 0.6 - 0.40 0.28 Uttorina spp. 0.4 0.2 0.4 0,2 0.30 0.12 Mopa/iaspp. 0.2 0.2 0.8 - 0.30 0.35 Hemigrapsus nudus - 0.8 - 0.20 0.40 Pagurus spp. - 0.6 0.15 0.30 Chlorostoma brunnea - - 0.4 0.10 0.20 Anthop/eura xanthogrammica 0.2 - - 0.05 0.10 Crepidu/a spp. 0.2 - - 0.05 0.10 Grapsidae - - 0.2 0.05 0.10 Lottia ochracea - 0.2 - 0.05 0.10 Strongylocentrotus purpuratus - 0.2 - 0.05 0.10 Invertebrate Cover Chthama/us fissus 1.7 5.8 3.8 2.5 3.46 1.76 Phragmatopoma californica 0.2 <0.1 <0.1 0.2 0.12 0.11 Spirorbidae <0.1 - - <0.1 <0.01 <0,01 (table continued)

C' ESLO2023-004 C-52

Appendix C - Intertidal Algae, Invertebrates and Substrates Table C26 (continued). Intertidal algae, sessile invertebrates, and substrates (percent cover) and motile invertebrat~s (abundance per 1.0 m2) survey means, standard deviations and 2022 annual means for South Control Station SC l+0.9m (19+3).

Survey: 208 ,',

209 )10 . *211 * ,' '., < ' .

- Survey Date_ *fs-Feb-22 16-Jlip-22 12-AU!;t22 09,Nov~22 Annual *. Annu\1I Taxon --

• Mean Mean Mean Mean. Mean *Std.Dev.

Substrate Cover rock 23.8 35.1 29.3 33,7 30.49 5.09 cobble 11.1 9,5 14.5 11.9 11.77 2.09 sand (shell gravel) 1.7 2.1 2.8 4,2 2.69 1.08 C' ESLO2023-004 C-53

Diab/o Canyon Power Plant I

i Appendix D lr11tertidal Fishes (VBT Method)

. 'I I

I I

, , ESL02023-004

. . , PG&E

• DpPP-RWMP 2022 Annual Report I

l

Appendix D - Intertidal Fishes Table D1. Intertidal fish survey totals, 2022 annual means, and standard deviations, North Control Station NC IV(N).

,*:i:IIUY~l\l* ' . .,- ,16f* ::*: ;\: ,:.1~9}.;,:.".:~ .*' *. '11ft': }~.'J711f,O:~ ,:,*;,:, -~-)-,-.:~ *,;,

~1,,rv.,.1 r.i,;,ta,"1* '03-Jari-22 '19-'AP-r-22 ,

• Ji~id,22~.'.' , 23,Dec-22,'. *.,/ *,i, ~.:. . .. '

Xiphister atropurpureus

\r~tiit<~ . _. . ~~tt{ .L;~,ri~~/~_;: :J\~r:t*\. : : }:::~*t \:\~:t ~;,_

9 1 3 16 7.25 6.75 Phol!dae/Stichaeidae 4 3 7 ,4 4.50 1.73 Gobiesox maeandricus 8 1 6 '1 4.00 3.56 Cebidichthys violaceus 1 1 3 1.25 1.26 Apodichthys fuoorum 1 2 1 1.00 0.~2 Xiphister muoosµs 2 1 0.75 0.96 Psychrolutidae 2 0.75 0.96 Gibbonsia spp. 1 0.50 0.58 Sebastes chrysomelas 1 ta ~w Anoplarohus purpuresoens 1 0.25 0.50 Oligocotlus snyderi 0.25 0.50 Gobiesoxs 0.25 ' 0.50 Table D2. Intertidal fish survey totals, 2022 annual means, and standard deviations, Field's Cove Station FC lV (C). .

Cebidichthys violaoeus 4 9 16 10.25 5.06 Phol!dae/Stichaeidae 15 7 8 8 9.50 3.70 Xiphister atropurpureus 6 8 . 5 4.75 3.40 Clinocottus analis 7 8 3.75 4.35 O/igooot/us snyderi 2 9 3.00 4.08 Gobiesox maeandrious 2 8 1 2~ 3.59

• Psychrolutidae 1 1 5 1.75 2.22 Gibbonsia spp. 1 5 1.50 2.38 Xiphister muoosus 3 1 125 1.26 Anoplarohus purpurescens 1 0.25 0.50 Arledius spp. 1 0.25 0.50 Arledius oora/linus 0.25 0.50 Oli ocoltus/Clinoooltus s . 0.25 0.50 7

n'=' ESLO2023-004

. D-1

Appendix D - Intertidal Fishes Table D3. Intertidal fish survey totals, 2022 annual means, and standard deviations, North Diablo Cove Station NJ,)C 1V (L).

Survey 168 169 170 171 .*

Survey Date 31-Jan-22 19-May-22 09:Aug-22 ~~-Nqv-22 I; Annual Std.

Taxon Total Total Total Totat Mea.n Dev.

Gibbons/a spp. - - - 1 0.25 0.50 Cebidichthys vio/aceus - 1 - 0.25 0.50 Atherinopsidae - 1 - 0.25 0.50 Table D4. Intertidal fish survey totals, 2022 annual means, and standard deviations, South Diablo Cove Station SDC 2V (H).

.. Survey 168 169 170 17,1 Survey Date

• 01-Feb-22 20*M!!Y*22 15-Jul-22 21-Dec-22

• Annu.al .Std.

Taxon Total .* Total TOtal .Total

• Mean Dev.

Cebidichthys violaceus 7 3 10 19 9.75 6.80 Xiphister atropurpureus 2 2 8 1 3.25 3.20 Pholidae/Stichaeidae 1 1 1 2 1.25 0.50 Xiphister mucosus - 3 2 1.25 1.50 Anop/archus purpurescens - - 2 0.50 1.00 Artedius spp. 1 - 0.25 0.50 O/igocottus snyderi - - - 1 0.25 0.50 Anoplarchus!Cebidichthys spp. 1 - 0.25 0.50 Atherinoos affinis - - 1 - 0.25 0.50 Table DS. Intertidal fish survey totals, 2022 annual means, and standard deviations, South Control Station SC IV (S).

Survey 168 169 170 171 Survey Date 04-Jan~22

• 15-Jun-22 12-Jul-22 22-Dec.22 Amiual Std.

Tax.on .Total Total 'Total Total :Mec1n. Dev.

Gobiesox maeandricus 10 21 5 19 13.75 7.54 Pholidae/Stichaeidae 14 15 14 5 12.00 4.69 Anoplarchus purpurescens 14 16 11 7 12.00 3.92 Cebidichthys violaceus 5 11 11 13 10.00 3.46 O/igocottus snyderi 3 2 11 - 4.00 4.83 Xiphister mucosus 2 2 7 2.75 2.99 Clinocottus analis 1 2 5 2.00 2.16 Psychrolutidae 2 - 6 2.00 2.83 Xiphister atropurpureus 3 1 2 1.50 1.29 Artediusspp. 2 0.50 1.00 Porichthys notatus - 1 1 - 0.50 0.58 Gibbonsia spp. - - - 1 0.25 0.50 Radulinus asprellus - - 1 0.25 0.50 Gobiesox spp. - 1 - 0.25 0.50

~ ESL02023-004 D-2

Appendix D - Intertidal Fishes THIS PAGE WAS INTENTIONALLY LEFT BLANK

"'D ESLO2023-004 D-3

Diab/o Canyon Power Plant I

Appendix E *-

Subtidal Algae and Invertebrates (SAQ.Method)

, , ESL02023-004

• ff! 1 PG&E

• DCPP-RWMP 2022 Annual Report A-0

Appendix E - Subtidal Algae and Invertebrates Table El. Subtidal algae and invertebrates (SAQ Method) 2022 survey means ( abundance per 7 m 2), standard deviations and annual means, Field's Cove Station FC 1 -3m (22-10).

19!>, 1~1**. *1~s*c. *.

'tli,:Apr~f2: . 95-Jul*2t;* 29~A~"-;2i

'*. >'9,, .. i ,*

Mean ,JVl~an,

*

Strongylocentrotus purpuratus 280.0 154.5 170.5 104.8 177.44 73.88 Chlorostoma bronnea . 30.8 32.3 61.5 31.12 25.12 Acmaea mitra 27.0 18.0 11.3 45.8 25.50 14.96 Serpulidae 6.0 13.5 9.0 12.0 10.12 3.33 Ch/orostoma montereyi 36.8 1.5 9.56 18.14 Patiria mini~ta 6.3 9.8 . 4.5 9.0 7.38 2.44 Anthopleura e/egantissima 2.3 2.3 0.8 6.0 2.81 2.24 Ophiothrix spiculata 1.8 1.3 3.0 1.8 1.94 0.75 Diodora spp. 1.5 0.8 3.8 0.5 1.62 1.48 Serpulorbis squamigerus 2.8 2.5 0.8 1.50 1.34 Leptasterias spp. 0.8 1.0 3.0 1.0 1.44 1.05 Anthopleura atfemisia 0.8 0.3 3.3 1.06 1.49 Pagurus spp. 1.0 1.3 1.8 1.00 0.74 Eudistylia polymorpha 1.0 0.5 2.0 0.3 0.94 0.77 Cucumaria spp. 1.0 2.3 0.81 1.07 Lottiidae 0.3 2.5 0.69 1.21 Strongylocentrotus franciscanus 0.8 1.0 1.0 0.69 0.47 Ophioplocus esmarki 0.3 1.5 0.44 0.72 Pelecypoda boring 0.3 0.3 1.0 0.38 0.43 Haliotis spp. 0.5 0.3 0.19 0.24 Hermissenda crassicomis 0.8 0.19 0.38 Megathura crenulata 0.3 0.3 0.3 0.19 0.12 Mitra ldae 0.3 0.3 0.12 0.14 Placiphorella vela/a 0.3 0.3 0.12 0.14 Urlicina spp. 0.3 0.3 0.12 0.14 Aptyxis luteopictus 0.3 <0.10 0.12 Diaulula sandiegensis 0.3 <0.10 0.12 Halcampa decemtentaculata 0.3 <0.10 0.12 Henricia leviuscula 0.3 <0.10 0.12 Lottia ochracea 0.3 <0.10 0.12 Lottia pelta 0.3 <0.10 0.12 Mexichromis porlerae 0.3 <0.10 0.12 Ocinebrina spp. 0.3 <0.10 0.12 Phidiana hi/toni 0.3 <0.10 0.12 Pomaulax undosa 0.3 <0.10 0.12 Roma/eon antennarius 0.3 <0.10 0.12 Teth a ca/iforniana 0.3 <0.10 0.12 C' ESLO2023-004 E-1

Appendix E - Subtidal Algae and Invertebrates Table E2. Subtidal algae and invertebrates (SAQ Method) 2022 survey means (abundance per 7 m2), standard deviations and annual means, North Diablo Cove Station NDC 2 -3m (8-10).

Survey 196 197 198 199 Survey Date 20-Jan-22 25:May-22 16~Aug-22 03-Oct-22 Annual Annual*

taxon . Mean Mean Mean Mean Mean Std: Dev.

Algae Sargassum muticum 43.3 22.8 10.5 20.5 24.25 13.74 Cystoseira osmundacea 3.8 3.3 3.8 3.0 3.44 0.38 Macrocystis pyrifera . 0.3 0.3 0.3 0.19 0.12 Invertebrates Strongylocentrotus purpuratus 78.0 101.5 105.0 69.5 88.50 17.44 Acmaea mitra 60.0 8.3 12.0 15.0 23.81 24.28 Anthop/eura e/egantissima 16.5 9.0 23.3 6.0 13.69 7.76 Ophiothrix spicu/ata 9.0 5.0 1.8 . 3.94 3.96 Serpulidae 3.0 5.5 2.8 1.8 3.25 1.59 Ophiactis simplex . . . 9.3 2.31 4.62 Tonicella lineata . 3.0 . 1.5 1.12 1.44 Ch/orostoma brunnea . . . 2.3 0.56 1.12 Pferopurpura festiva 1.3 0.8 . - 0.50 0.61 Ophiopteris papil/osa 1.3 - 0.3 - 0.38 0.60 Megathura crenulata - 0.3 0.8 0.3 0.31 0.31 Crassadoma gigantea 0.8 - 0.3 - 0.25 0.35 Mitra idae 0.3 - 0.5 0.3 0.25 0.20 Strongy/ocentrotus franciscanus 0.3 0.5 0.3 - 0.25 0.20 Cucumaria spp. - 0.5 0.3 - 0.19 0.24 Diopafra ornata - 0.8 - - 0.19 0.38 Eudistylia polymorpha - 0.3 0.5 - 0.19 0.24 Lottia ochracea - - - 0.8 0.19 0.38 Diodora spp. - - - 0.5 0.12 0.25 Octopus spp. 0.3 - 0.3 - 0.12 0.14 Pelecypoda boring - 0.3 - 0.3 0.12 0.14 Anthopleura artemisia - - 0.3 - <0.10 0.12 Heptacarpus spp. - - 0.3 - <0.10 0.12 Lottia pelta - - - 0.3 <0.10 0.12 Lottiidae 0.3 - - - <0.10 0.12 Modio/us spp. 0.3 - . - <0.10 0.12 Ophiop/ocus esmarki . 0.3 - - <0.10 0.12 Parastichopus spp. 0.3 - . - <0.10 0.12 Placiphorel/a vela/a . - 0.3 - <0.10 0.12 Roma/eon antennarius - - 0.3 - <0.10 0.12 C' ESLO2023-0CM E-2

Appendix E - Subtidal Algae and Invertebrates Table E3. Subtidal algae and invertebrates (SAQ Method) 2022 survey means (abundance per 7 m 2), standard deviations and annual means, North Diablo Cove Station NDC 3 -3m (9710).

196. :, 198

'14*Feli-22 18*AU!J*22

.T~on 'Mean'.*

Algae Sargassum muticum 66.5 52.5 170.0 72.25 71.18 Cystoseira osmundacea '16.8 5.3 7.8 19.3 12.25 6.79 Macrocystis pyrifera 1.0 1.3 0.5 0.69 0.55 Pferygophora califomica 0.5 0.12 0.25 Invertebrates Strongylocentrotus purpuratus 122.8 74.0 104.3 160.5 115.38 36.18 Acmaea mitre

• 9.0 15.8 8.3 31.5 16.12 10.79 Anthopfeura elegantissima 9.5 3.5 13.0 8.8 8.69 3.92 Ophiothrix spiculata 13.8 5.5 10.8 7.50 6.05 Anthopleura artemisia 20.3 0.3  !?.12 10.08 Serpulidae 1.5 5.5 2.8 10.5 5.06 3.99 Pferopurpura festiva 0.8 2.8 0.8 1.3 1.38 0.95 Ophiactis simplex 4.8 1.19 2.38 Eudistylia polymorpha 0.3 2.3 0.5 1.0 1.00 0.89 Strongylocentrotus franciscanus 0.3 0.8 1.5 0.62 0.66 Ophiopteris papillosa 1.3 1.0 0.56 0.66 Tonicella lineata 1.5 0.8 0.56 0.72 Crassadoma gigantea 0.3 0.5 0.8 0.38 0.32 Megathura crenulata 1.0 0.5 0.38 0.48 Pelecypoda boring 0.5 0.3 0.8 0.38 0.32 Serpulorbis squamigerus 0.8 0.19 0.38 Mitraidae 0.5 0.12 0.25 Diau/ula sandiegensis 0.3 <0.10

• 0.12 Diodora spp. 0.3 <0.10 0.12 Dorisspp. 0.3 <0.10 0.12 Ha/iotis spp. 0.3 <0.10 0.12 Heptacarpus spp. 0.3 <0.10 0.12 Lottia ochracea 0.3 <0.10 0.12 Octopus spp. 0.3 <0.10 0.12 Pagurus spp. 0.3 <0.10 0.12 Placiphorella velata 0.3 <0.10 0.12 Pugettia spp. 0.3 <0.10 0.12 Sabellidae 0.3 <0.10 0.12

~ ESLO2023-004 E-3

Appendix E - Subtidal Algae and Invertebrates Table E4. Subtidal algae and invertebrates (SAQ Method) 2022 survey means (abundance per 7 m 2), standard deviations and annual means, North Diablo Cove Station NDC 4 -4m (9-15).

Survey 196, 197 198 199 Sur:vey Date

• 18-Jan-22 6-Jun-22 22-Aug~22 19-Dec-22

• Annual An111,1al

. Taxpn Mean*.:. . Mean Mean Mean Mean Sfd. Dev.

Algae Cystoseira osmundacea 0.3 - 1.8 0.50 0.84 Invertebrates Strongy/ocentrotus purpuratus 215.5 268.0 484.5 288.8 314.19 117.65 Acmaea mitra 28.5 4.5 12.8 97.5 35.81 42.31 Anthopfeura e/egantissima 11.3 15.8 20.3 79.8 31.75 32.21 Serpulidae 21.3 28.5 24.0 29.0 25.69 3.72 Ophiothrix spicufata 5.8 11.0 17.0 8.8 10.62 4.76 '

Strongyfocentrotus franciscanus 2.5 2.0 3.0 6.3 3.44 1.92 Crassadoma gigantea 0.8 1.8 1.8 9.3 3.38 3.94 Tethya ca/ifomiana 0.8 0.5 0.8 8.3 2.56 3.79 Eudisty/ia polymorpha 0.3 0.5 1.0 7.8 2.38 3.60 Pferopurpura festiva 0.5 2.3 0.8 3.3 1.69 1.30 Serpulorbis squamigerus 1.8 1.5 3.5 - 1.69 1.43 Pelecypoda boring 0.3 - 0.3 5.0 1.38 2.42 PlaciphorE1fla vela/a 1.0 0.8

• 1.5 0.81 0.62 Tonicella lineata - 0.8 - 2.3 0.75 1.06 Ophiopteris papillosa 0.8 0.3 0.5 1.3 0.69 0.43 Patiria miniata 0.5 1.0 0.3 1.0 0.69 0.38 Diopatra ornata 0.8 0.5 0.3 0.38 0.32 Anthopleura artemisia 0.5 0.8 - 0.31 0.38 Cucumaria spp. - 0.3 1.0 0.31 0.47 Sabellidae 0.3 - 1.0 0.31 0.47 Cypraea spadicea 0.3 - 0.8 - 0.25 0.35 Diodora spp. 0.3 0.3 0.5 0.25 0.20 Mitra idae 0.3 0.8 - 0.25 0.35 Pseudochama spp. 0.5 0.5 0.25 0.29 Ha/iotis spp. 0.3 - 0.3 0.3 0.19 0.12 Diaulu/a simdiegensis - 0.3 0.3 0.12 0.14 Leucilla nuttingi 0.5 - - 0.12 0.25 Parastichopus spp. - 0.5 - - 0.12 0.25 Eupentacta quinquesemita 0.3 - - - <0.10 0.12 Megathura crenulata - - 0.3 - <0.10 0.12 Nemertea - - 0.3 - <0.10 0.12 Octopus spp. - - 0.3 <0.10 0.12 Phidiana hi/ton/ 0.3 - <0.10 0.12 Pododesmus cepio 0.3 - - <0.10 0.12 a cSLO2023-004 E-4

Appendix E Subtidal Algae and Invertebrates Table ES. Subtidal algae and invertebrates (SAQ Method) 2022 survey means (abundance per 7 m 2), standard deviations and annual means, South Diablo Cove Station SDC 2 -3m (12-10). *

" *,~~-

'Mar: ..

• . AnnJ;,_

"Tiixor(:y _tMean ' ssic1.6~v:

Invertebrates Strongy/ocentrotus purpuratus 185.8 114.0 213.0 338.0 212.69 93.40 Serpulorbis squamigerus 13.5 23.8 8.3 26.8 18.06 8.66 Serpulidae 9.8 6.3 26.8 15.5 14.56 8.98 Diopatra ornata 19.5 3.0 9.8 13.0 11.31 6.87 Acmaea mitre 9.8 20.3 3.8 9.8 10.88 6.86 Ophiothrix spiculata 9.8 3.3 14.3 13.8 10.25 5.08 Anthopleura elegantissima 9.5 2:3 7.3 4.8 5.94 3.13 Patiria miniata 3.5 4.3 4.0 5.5 4.31 0.85 Anthopleura artemisia 1.5 8.3 "'2.5 3.3 3.88 3.00 Mitraidae 8.3 3.8 1.3 2.3 3.88 3.09 Strongy/ocentrotus franciscanus 5.8 0.8 4.0 3.3 3.44 2.08 Pferopurpura festiva 0.5 6.0 3.8 2.56 2.83 Cucumaria spp. 1.3 1.8 1.5 1.12 0.78 Ophiopteris papillosa 2,5 1.3 0.8 1.12 1.05 Pelecypoda boring 2.0 0.3 1.8 1.00 1.02 Pagurus spp. 0.8 0.5 1.8 0.75 0.74 Ganus californicus 2.5 0.3 0.69 1.21 Boltenia vil/osa 1.8 0.44 0.88 Tonicel/a /ineata 0.8 0.8 0.38 0.43 Cirratulidaefferebellidae 1.3 0.31 0.62 Eudistylia polymorpha 1.3 0.31 0.62 Halcampa decemtentaculata 0.5 0.8 0.31 0.38 Tethya ca/iforniana 0.3 0.3 0.8 0.31 0.31 Diodora spp. 1.0 0.25 0.50 Pachycerianthus fimbriatus 0.8 0.3 0.25 0.35 Pfaciphore/la velata 0.8 0.3 0.25 0.35 Loxorhynchus spp. 0.8 0.19 0.38 Anthopleura spp. 0.5 0.12 0.25 Cnemidocarpa finmarkiensis 0.5 0.12 0.25 Anthozoa 0.3 <0.10 0.12 Crassadoma gigantea 0.3 <0.10 0.12 Diau/ula sandiegensis 0.3 <0.10 0.12 Doriopsi//a albopunctata 0.3 * <0.10 0.12 Dorisspp. 0.3 <0.10 0.12 Fissure/la volcano 0.3 <0.10 0.12 Hermissenda crassicomis 0.3 <0.10 0.12 Octopus spp. 0.3 <0.10 0.12 Ophioplocus esmarki 0.3 <0.10 0.12 Pseudochama spp. 0.3 <0.10 0.12 Roma/eon antennarius 0.3 <0.10 0.12 Sc ra acutifrons 0.3 <0.10 0.12 C' ESLO2023-004 E-5

Appendix E Subtidal Algae and Invertebrates Table E6. Subtidal algae and invertebrates (SAQ Method) 2022 survey means (abundance per 7 m2), standard deviations and annual means, South Diablo Cove Station SDC 3 -4m (10-15).

Survey 196 197 198 199

• Survey Date 8,Feb-22 *22.Jun-22 1-Sep-22 15-Dec-22 Annual Annual Taxon Mean Mean .* Mean Mean Mean Ste\. Dev. .

Algae Laminariales 0.3 - - - <0.10 0.12 Invertebrates strongylocentrotus purpuratus 256.0 222.8 230.0 326.3 258.75 47.21 Anthopleura elegantissima 22.0 14.5 20.0 18.8 18.81 3.17 Serpulorbis squamigerus 20.0 17.3 11.5 11.0 14.94 4.41 Serpulidae 9.5 10.5 5.8 9.3 8.75 2.07 Cucumaria spp. 4.8 2.3 16.3 2.0 6.31 6.74 Acmaea mitra 2.3 4.5 7.5 10.5 6.19 3.59 Strongy/ocentrotus franciscanus 3.0 4.5 3.3 4.5 3.81 0.80 Diopatra omata 5.0 1.5 3.0 4.5 3.50 1.58 Ophiothrix spicu/ata 2.0 1.0 7.5 1.5 3.00 3.03 Anthop/eura artemisia 2.5 0.8 1.8 2.5 1.88 0.83 Mitraidae 0.8 0.8 2.0 2.3 1.44 0.80 Kelletia kelletii 0.5 - 0.8 2.8 1.00 1.21 Patiria miniata Lo 1.5 1.0 0.5 1.00 0.41 Cypraea spadicea 1.0 0.3 1.0 1.0 0.81 0.38 Diodora spp. 1.0 0.8 0.8 0.8 0.81 0.12 Sabellidae 1.0 1.5 0.3 - 0.69 0.69 Pelecypoda boring 0.5 0.3 1.0 0.8 0.62 0.32 Placiphorella velata - 1.0 1.0 0.5 0.62 0.48 Anthozoa 0.8 - 1.0 0.5 0.56 0.43 Hermissenda crassicornis - 1.8 - 0.44 0.88 Ophiopteris papillosa 0.5

• 0.3 0.5 0.5 0.44 0.12 Pferopurpura festiva 0.5 - 0.8 0.5 0.44 0.31 Crassadoma gigantea - 0.5 0.3 0.8 0.38 0.32 Tonicel/a /ineata - - 1.5 0.38 0.75 Dorlsspp. - 1.0 - 0.3 0.31 0.47 Eudistylia polymorpha 0.3 0.3 0.5 0.3 0.31 0.12 Pisaster giganteus - 0.5 0.5 0.3 0.31 0.24 Urticina spp. 0.3 0.3 0.3 0.5 0.31 0.12 CirratulidaefTerebellidae - - 0.3 0.8 0.25 0.35 Doriopsilfa albopunctata 0.5 - 0.3 0.3 0.25 0.20 Megathura crenulata 0.3 0.3 0.3 - 0.19 0.12 Pachycerianthus fimbriatus 0.3 0.3 0.3 0.19 0.12 Pododesmus cepio - 0.3 0.3 0.3 0.19 0.12 Cnemidocarpa finmarkiensis 0.5 - . 0.12 0.25 Eupentacta quinquesemita 0.5 - - - 0.12 0.25 Ha/campa decemtentacu/ata 0.3 - ' 0.3 0.12 0.14 Pagurus spp. 0.3 - - 0.3 0.12 0.14 Pseudomelatoma torosa - 0.3 - 0.3 0.12 0.14 Scyra acutifrons - - 0.3 9.3 0.12 0.14 Crepidula spp. . 0.3 <0.10 0.12 Cumingia califomica - - 0.3 <0.10 0.12 Lissothuria nutriens - - . 0.3 <0.10 0.12 Nemertea - - 0.3 <0.10 0.12 Panda/us spp. - 0.3 - <0.10 0.12 Petrolisthes SOD. . - 0.3 - <0.10 0.12 (table continued) t' ESL02023-004 E-6

Appendix E Subtidal Algae and Invertebrates Table E6 (continued). Subtidal algae and invertebrates (SAQ Method) 2022 survey means (abundance per tax~m.;'

Invertebrates (continued)

Pseudochama spp. 0.3 <0.10 0.12 Roma/eon antennarius 0.3 <0.10 0.12 Sipuncula 0.3 <0.10 0.12 Terebratalia transversa 0.3 <0.10 0.12 Thrombo h on trach dermum 0.3 <0.10 0.12 I

C' ESLO2023-004 E-7

Appendix E - Subtidal Algae and Invertebrates Table E7. Subtidal algae and invertebrates (SAQ Method) 2022 survey means (abundance per 7 m2), standard deviations and annual means, South Control Station SC 1 -3m (19-10).

Survey 196 ..

197 198 199 Survey Date 4-Feb-22 28-Jun*22 *9-Aug-22 8-Dec-22 Annu~I Annual Jaxon Mean Mean Mean Mean Mean Std.Dev.

Algae Cystoseira osmundacea 10.5 10.0 14.5 15.0 12.50 2.61 Pferygophora cafifomica 1.3 1.0 0.3 0.3 0.69 0.52 Laminaria setchelfii - 0.8 - 0.8 0.38 0.43 Laminariales 0.3 - - - <0.10 0.12 Nereocyslis /uetkeana - - 0.3 - <Q.10 0.12 Invertebrates Chlorostoma brunnea 345.0 50.3 68.3 174.8 159.56 135.28 Strongyfocenfrotus purpuratus 145.0 53.5 51.3 65.0 78.69 44.62 Pagurus spp. 45.3 5.0 18.3 33.3 25.44 17.54 Acmaea mitra 18.0 15.0 21.8 12.8 16.88 3.90 Tonicelfa fineata 11.3 12.0 6.0 1.5 7.69 4.91 Patiria miniata 5.3 7.5 8.8 5.0 6.62 1.81 Calliostoma /igatum 5.3 1.5 4.5 4.5 3.94 1.66 Anthopleura elegantissima 3.5 4.0 3.8 1.5 3.19 1.14 Cryptochiton stel/eri 3.0 2.5 2.0 2.5 2.50 0.41 Ch/orostoma montereyi - 0.8 2.3 3.0 1.50 1.37 Serpu/orbis squamigerus 2.5 0.5 0.3 - 0.81 1.14 Anthopleura artemisia 1.0 0,5 0.8 0.5 0.69 0.24 Leptasterias spp. 0.8 0.5 0.8 0.8 0.69 0.12 Clavelina huntsmani - 2.5 - 0.62 1.25 Pugettia spp. 0.5 - 0.8 1.3 0.62 0.52 Urlicina spp. 0.8 0.5 0.8 0.3 0.56 0.24 Serpulidae 1.0 0.8 0.3 0.50 0.46 Conus califomicus - 0.3 1.0 0.5 0.44 0.43 Diodora spp. 1.3 - 0.5 0.44 0.59 Ophiothrix spicu/ata 1.3 - 0.3 0.38 0.60 Diopatra omata 1.3 - - - 0.31 0.62 Haliotis spp. 0.8 - 0.5 0.31 0.38 Cryptofithodes sitchensis 0.5 0.5 - 0.25 0.29 Mitra idae 0.3 0.3 0.3 0.3 0.25 <0.1 Myti/usspp. 0.8 - - 0.3 0.25 0.35 Dorisspp. - 0;3 0.3 0.3 0.19 0.12 Mopa/iaspp. 0.5 - 0.3 - 0.19 0.24 Pomau/ax undosa - 0.8 - 0.19 0.38 Ceratostoma fofiatum 0.5 - - 0.12 0.25 Doriopsi/fa afbopunctata 0.3 - 0.3 - 0.12 0.14 Lophopanopeus spp. - 0.3 0.3 0.12 0.14 Pseudomefatoma lorosa 0.3 - 0.3 0.12 0.14 Scyra acutifrons 0.5 - - 0.12 0,25 Anlhop/eura spp. 0.3 - - <0.10 0.12 Crassadoma gigantea 0.3 - - - <0.10 0.12 Loxorhynchus spp. - 0.3 - <0.10 0.12 Modio/us spp. - - 0.3 <0.10 0.12 Ocinebrina spp. 0.3 - - <0.10 0.12 Okenia rosacea - - 0.3 <0.10 0.12 Paraxanthias tayfori 0.3 - - - <0.10 0.12 Pelecvooda borina - 0.3 - - <0.10 0.12 (table contmued)

C' ESL02023-004 E-8

Appendix E - Subtidal Algae and Invertebrates Table E7 (continued). Subtidal algae and invertebrates (SAQ Method) 2022 survey means (abundance per 7 m 2), standard deviations and annual means, South Control Station SC 1 -3m (19-10).

• 1,96 .*\197 **,; * *c* *19 0

• • ~F~p72,2 *. B~un~~f * *~,M Invertebrates (continued)

Pisaster/Henricia spp. Quv.) 0.3 <0.10 0.12 Pododesmus cepio 0.3 <0.10 0.12 Pomautax gibberosa 0.3 <0.10 0.12 Pyura haustor 0.3 <0.10 0.12 Sabel!idae 0.3 <0.10 0.12 Stye/a spp. 0.3 <0.10 0.12 Tefh a ca/ifomiana 0.3 <0.10 0.12 C' ESLO2023-004 E-9

Appendix E - Subtidal Algae and Invertebrates Table ES. Subtidal algae and invertebrates (SAQ Method) 2022 survey means (abundance per 7 m2), standard deviations and annual means, South Control Station SC 2 -6m (20-20).

Survey 196 197 198 199

Survey Date 11-Mar-22 26-M;1y-22 17-Aug-22 20-Dec-22 Annual Annual Taxon Mean *Mean Mean ME!;Jn Mean StdiDev.

Invertebrates Serpulorbis squamigerus 113,8 171.0 85.0 149.0 129.69 37.99 Acmaea mitra 35.3 72.8 106.5 240.0 113.62 89,13 Strongy/ocenfrotus purpuratus 101.8 112.5 101.0 122.0 109.31 9.96 Chlorosfoma brunnea 21.0 68.3 72.0 39,8 50.25 24.24 Cal/iostoma ligatum 22,5 27.8 14,3 69,0 33.38 24.39 Serpulidae 13.5 8.5 14.8 46.5 20.81 17.34 Ophiothrix spiculata 3.0 13.3 35.8 3.5 13.88 15.33 Tonicel/a lineata 15.0 13.5 15.8 8.3 13.12 3.38 Anthop/eura e/egantissim_a 3.3 3.3 2.5 13.3 5.56 5.14 Patiria miniata 3.0 2,3 6.8 6.0 4.50 2.21 Strongy/ocentrotus franciscanus 2.8 2.3 5.5 6.3 4.19 1.98 Cucumaria spp. 2.8 4.8 6,3 - 3.44 2.70 Kel/etia kel/etii - 0.3 1,3 9.5 2.75 4.53 Chlorostoma montereyi - 3.8 6.0 2.44 2.96 Eudistylia polymorpha 1.3 2.5 - 3.5 1.81 1.52 Anthopleura artemisia 1.5 2.0 3.0 - 1.62 1.25 Crassadoma gigantea 0.8 0.8 - 4.8 1.56 2.15 Ophiopteris papil/osa 0.5 - - 3.3 0.94 1.56 Conus califomicus - 0.5 1.3 1.5 0.81 0,69 Tethya califomiana 0.5 0,8 1.0 0.8 0.75 0.20 Pagurus spp. 1.3 0.3 0,8 - 0.56 0.55 Urticina spp. 1.0 0.8 0.5 0.56 0.43 Leptasterias spp. 1.0 - 0,3 0,8 0.50 0.46 Pferopurpura festiva - 1.8 0.3 0.50 0.84 Lottiidae - 1.8 - - o:44 0.88 Pododesmus cepio 0.3 0.5 0.8 - 0.38 0.32 Diodora spp. 0.5 0.3 0.5 0.31 0.24 Mytilusspp. 1.3 - 0.31 0.62 Placiphorella velata 0.3 0.5 - 0.5. 0.31 0.24 Ceratostoma foliatum 1.0 - 0.25 0.50 Cryptochiton stelleri 0.5 0,3 - 0.3 0.25 0.20 Pisaster ochraceus - 0.5 0.3 0.3 0.25 0.20 Ophioplocus esmarki - 0.8 - - 0.19 0.38 Sabellidae 0.3 - 0.5 - 0.19 0.24 Doriopsi!la albopunctata - 0.5 0.12 0.25 Doris spp, - - - 0.5 0.12 0.25 Pisaster!Henricia spp. ijuv.) 0.3 0.3 - 0.12 0.14 Anthopleura spp, 0,3 - - <0.10 0.12 Aptyxis luteopictus - 0,3 - - <0.10 0.12 Boltenia villosa 0.3 - - <0.10 0.12 Cirratulidae/Terebellidae - 0.3 - <0.10 0.12 Cnemidocarpa finmarkiensis - - 0.3 - <0.10 0.12 Diopatra omata 0.3 - - <0.10 0.12 Epiactis prolifera - 0.3 - - <0.10 0.12 Hiooonix SDD. - 0.3 - - <0.10 0.12 (table continued)

C' ESLO2023-004 E-10

Appendix E - Subtidal Algae and Invertebrates Table ES (continued). Subtidal algae and invertebrates (SAQ Method) 2022 survey means (abundance per 7 m2), standard deviations and annual means,

. South Control Station SC. 2 -6m (20-20).

Anni.al* .* .. Annual

\1M;an~ *, ::;.~:sid~:o~v/:

Invertebrates (continued)

Mitra idae 0.3 <0.1 0,12 Paraxanthias taylori 0.3 <0.1 0.12 Pugettia spp. 0.3 <0.1 0.12 Scyra acutifrons 0.3 <0.1 0.12 S hecios on ia confoederata 0.3 <0.1 0.12 C' ESL02023-004 E-11

Diab/a Canyon Power Plant Appendix F Subtidal Algae {SLC Method)

, , ESLO2023-004

, . , PG&E

• DCPP-RWMP 2022 Annual Report A-0

Appendix F - Subtidal Algae Table Fl. Subtidal algae (SLC Method) 2022 survey means (percent cover), standard deviations and annual means, Field's Cove Station FC 1 -3m (22-10).

',J~6 j~j) f~A~r-22 14.,oct:22,

'!"axon Mean M.ean Algae non-coralline crust 62.0 65.0 73.0 66.5 66.62 4.64 coralline crust ,33.0 24.5 17.5 26.0 25.25 6.36 Chrysophyta 13.0 6.0 . <0.1 8.0 6.75 5,37 Calliarlhron/Bossiella spp. -complex to <0.1 <0.1 <0.1 0.26 0.50 filamentous red algae complex <0.1 0.5 <0.1 <0.1 0.13 0.25 Cryptopleura violacea 0.5 <0.1 <0.1 0.13 0.25 Pferosiphonia dendroidea <0.1 <0.1 <0.1 <0.1 0.01 <0.01 Bryopsis spp. <0.1 <0.1 <0.1 <0.1 0.01 <0.01 Chlorophyta (filamentous) <0.1 <0.1 <0.1 0.01 <0.01 Halicysfis ova/is "<0.1 <0.1 <0.1 <0.1 <0.01 <0.01 Opunfie//a ca/ifornica <0.1 <0.1 <0.1 <0.1 <0.01 <0.01 Rhodophyta (juv. blades) <0.1 <0.1 <0.01 <0:01 Rhodymenia spp. <0.1 <0.1 <0.1 <0.01 <0.01 Chondracanfhus corymbiferus <0.1 <0.1 <0.01 <0.01 Fauchea laciniafa <0.1 <0.1 <0.01 <0.01 U/vaspp. <0.1 <0.1 <0.01 <0.01 Weeksia spp. <0.1 <0.1 <0.1 <0.01 <0.01 Ca/lophy/lis spp. <<0:1 <0.1 <0.01 <0.01 Antithamnion!Pferothamnion spp.-complex <0.1 <0.01 <0.01 Farlowia/Pikea spp.-complex <0.1 <0.01 <0.01 Halymenia/Schizymenia spp.-complex <0.1 <0.01 <0.01 Membranoptera/Branchioglossum spp. <0.1 <0.01 <0.01 Phaeophyta <0.1 <0.01 <0.01 Plocamium pacificum <0.1 <0.01 <0.01 Prionifis spp. <0.1 <0.01 <0.01 Pugetia firma <0.1 <0.01 <0.01 Invertebrates Serpulorbis squamigerus 1.0 . 0.5 0.38 0.48 Tefraclita rubescens 0.5 0.5 0.25 0.29 Anthop/eura elegantissima 0.5 0.12 0.25 Substrates colonized rock 80.0 67.5 78.0 70.0 73.88 6.06 colonized cobble 17.0 25.5 13.0 23.0 19.62 5.68 cobble 2.5 6.0 7.0 4.0 4.88 2.02 rock 0.5 0.5 2.0 1.0 1.00 0.71 sand shell ravel 0.5 2.0 0.62 0.95 c, ESLO2023-004 F-1

Appendix F - Subtidal Algae Table F2. Subtidal algae (SLC Method) 2022 survey means (percent cover), standard deviations and annual means, North Diab lo Cove Station NDC 2 -3m (8-10).

Survey 196 . 197 198 199. .

Survey Date 20-Jan*22 25-May-22 16-Aug-22 3-Oct-22 Annual A:nriual Taxon  ! Mean Mean .. Mean Mean Mean

• Std. ,E>ev.

Algae coralline crust 80.0 50.0 47.0 54.5 57.88 15.07 Acrosorium ciliolatum 24.0 7.5 9.0 19.0 14.88 7.94 filamentous red algae complex <0.1 ' 2.5 10.0 20.5 8.25 9.21 Chrysophyta 2.5 11.5 11.5 7.5 8.25 4.27 Calliarthron!Bossiella spp.-complex 7.0 12.0 8.5 5.5 8.25 2.78 Sargassum muticum 5.5 11.0 4.0 2.5 5.75 3.71 Cystoseira osmundacea 0.5 7.5 4.0 1.5 3.38 3.12 Colpomenia spp, 0.5 6.0 6.0 <0, 1* 3.13 3.32 t,.ntithamnion!Pferothamnion spp.-complex 10.0 0.5 1.0 0.5 3.00 4.67 Chlorophyta (filamentous) 2.0 <0.1 2.0 7.5 2.88 3.22 Codium fragile subsp. californicum <0.1 <0.1 4.0 6.5 2.63 3.19 Eciocarpales 0.5 4.0 <0.1 1.5 1.50 1.78 non-coralline crust 1.5 1,0 2.0 1.5 1.50 0.41 Cora/Jina chifensis - 0,5 3.0 0.5 1.00 1.36 U/vaspp. <0.1 1.0 1.0 1.0 0.75 0.50 Pferosiphonia dendroidea <0.1 - 1.5 0.5 0.50 0.71 Dictyota binghamiae <0.1 <0.1

• 1.0 <0.1 0.26 0,50 Macrocystis pyrifera - <0,1 0,5 <0.1 0.13 0.25 Ca/lophyllis spp. - 0.5 0.12 0.25 Ha/icystis ova/is <0.1 <0.1 <0.1 <0.1 0.01 <0.01 Farlowia/Pikea spp.-complex <0.1 <0, 1 <0.1 <0.1 0.01 <0.01 Gelid/um robustum <0.1 <0.1 - <0.1 <0.01 <0.01 Prionitis spp. - <0.1 <0.1 <0.1 <0.01 <0.01 Laminariales <0.1 <0.1 - <0.01 <0.01 Bryopsis spp. <0.1 - - - <0.01 <0.01 Rhodophyta Uuv. blades) - - <0.1 <0.01 <0.01 Rhodymenia spp, - <0.1 - - <0.01 <0.01 Weeksia spp. - - <0.1 <0.01 <0.01 Invertebrates Anthop/eura e/egantissima - 1.0 0.5 0.38 0.48 Phragmatopoma californica 1.0 - - 0.25 0.50 Substrates colonized rock 36.0 56.0 56.5 56.5 51.25 10.17 colonized cobble 19.0 33.5 36.0 32.0 30.12 7.60 rock 37,5 - - 9.38 18.75 cobble 7.5 3.5 1.5 6,5 4.75 2.75 sand /shell gravel) - 7.0 6.0 5.0 4.50 3.11 c, ESLO2023~004 F-2

Appendix F - Subtidal Algae Table F3. Subtidal algae (SLC Method) 2022 survey means (percent cover), standard deviations and annual means, North Diablo Cove Station NDC 3 -3m (9-10).

19&

.1~feb~2i <"' ,;,

Annual . . J,\nnli~I

~.Mean *Meao.~ ;Std. De\';;,

69.5 49.5 71.5 48.0 59.62 12.60 Acrosorium ciliolatum 47.5 10.5 23.5 33.0 28.62 15.60 Sargassum muticum 15.0 11.0 14.0 12.0 13.00 1.83 Chrysophyta 8.0 19.5 21.0 12.12 9.95 Colpomenia spp. 2.0 17.0 14.0 <0.1 8.25 8.50 Antithamnion/Pferothamnion spp.-complex 20.0 5.5 2.0 3.0 7.63 8.38 Calliatfhron!Bossiel/a spp.-complex 5.0 6.5 12.0 6.5 7.50 3.08 Cystoseira osmundacea 6.5 8.5 6.0 6.0 6.75 1.19 Chlorophyta (filamentous) 1.0 8.0 3.0 1.5 3.38 3.20 filamentous red algae complex <0.1 2.5 1.5 0.5 1.13 1.11 Corallina chilensis <0.1 3.5 <0.1 1.0 1.13 1.65 non-coralline crust 0.5 2.5 1.0 <0.1 1.01 1.08 Dictyota binghamiae <0.1 <0.1 1.5 0.5 0.51 0.70 U/vaspp. <0.1 1.5 0.5 0.51 0.71 Ectocarpales 2.0 <0.1 0.50 1.00 Farlowia/Pikea spp.-complex <0.1 <0.1 <0.1 1.0 0.26 0.50 Ge/idium robustum 1.0 <0.1 <0.1 <0.1 0.26 0.50 Pferosiphonia dendroidea <0.1 <0.1 <0.1 0.5 0.13 0.25 Prionitis spp. <0.1 0.5 <0.1 <0.1 0.13 0.25 Rhodymenia spp. <0.1 0.5 0.13 0.25 Ca/lophyllis flabellu/ata <0.1 ,Q,5 0.13 0.25 Cryptop/eura violacea 0.5 <0.1 0.13 0.25 Macrocystis pyrifera <0.1 <0.1 <0.1 <0.1 0.01 <0.01 Codium fragile subsp. Californicum <0.1 <0.1 <0.1 <0.1 0.01 <0.01 Halicystis ova/is <0.1 <0.1 <0.1 <0.1 0.01 <0.01 Cal/ophy/lis spp. <0.1 <0.1 <0.1 <0.1 <0.01 <0,01 Bryopsis spp. <0.1 <0.01 <0.01 Ahnfeltiopsis linearis <0.1 <0.1 <0.01 <0.01 Chondracanthus corymbiferus <0.1 <0.01 <0.01 Halymenia!Schizymenia spp.-comp!ex <0.1 <0.01 <0.01 Rhodophyta Guv. blades) <0.1 <0.01 <0.01 Sarcodiotheca gaudichaudii <0.1 <0.01 <0.01 Invertebrates Porifera (encrusting) 0.5 0.12 0.25 Substrates colonized rock 83.0 81.5 87.0 70.0 80.38 7.30 colonized cobble 14.5 14.0 9.5 24.5 15.62 6.33 sand (shell gravel} 0.5 2.5 1.5 5.5 2.50 2.16 cobble 1.0 2.0 0.75 0.96 rock 2.0 1.0 0.75 0.96

~ ESLO2023-004 F-3

Appendix F - Subtidal Algae Table F4. Subtidal algae (SLC Method) 2022 survey means (percent cover), standard deviations and annual means, North Diablo Cove Station NDC 4 -4m (9-15).

.Survey . '196 " 197 198 199 Survey Date 18-Jan-22 6-Jun*~ *. 2.2-Aug-22 19-Dec-22

. Annual Annual Taxon Mean Mean Mean Mean Mean Std. Dev.

Algae coralline crust 72.0 76.5 75.0 63.5 71.75 5.81 non-coralline crust 7.5 3.5 7.0 10.0 7.00 2.68 Calliarthron!Bossiella spp. -complex 5.5 3.5 2.0 9.0 5.00 3.03 Chrysophyta 8.5 6.5 <0.1 2.5 4.38 3.83 Antithamnion/Plerothamnion spp.-complex <0.1 2.0 0.5 0.5 0.76 0.87 filamentous red algae complex 2.0 0.5 0.5 <0.1 0.76 0.86 Chlorophyta (filamentous) 1.0 <0.1 <0.1 0.5 0.38 0.48 Plerosiphonia dendroidea 1.0 0.5 <0.1 <0.1 0.38 0.48 Acrosorium ciliolatum 0.5 0.5 - <0.1 0.25 0.29 Rhodophyta Uuv. blades) <0.1 <0.1 0.5 0.13 0.25 Cystoseira osmundacea <0.1 - 0.5 0.13 0.25 Rhodymenia spp. <0.1 <0.1 <0.1 <0.1 0.01 <0.01 Co/pomenia spp. <0.1 <0.1 <0.1 <0.1 0.01 <0.01 Codium fragile subsp. caljfornicum - .<0.1 <0.1 <0.1 <0.01 <0.01 Ectocarpales <0.1 - <0.1 <0.01 <0.01 Bryopsis spp. <0.1 <0.1 <0.1 - <0.01 <0.01 Ulva spp. - <0.1 - <0.01 <0.01 Cryptop/eura vio/acea <0.1 <0.1 - - <0.01 <0.01 Ca/lithamnion spp.lP/eonosporium spp. <0.1 - <0.01 <0.01 Die/yo/a binghamiae - - - <0.1 <0.01 <0.01 Gelid/um spp. - <0.1 - - <0.01 <0.01 Halicystis ova/is - - <0.1 <0.01 <0.01 Nienburgia andersoniana <0.1 - - - <0.01 <0.01 Prionitis spp. <0.1 - - <0.01 <0.01 Invertebrates Phragmatopoma ca/ifornica 2.0 1.0 2.5 2.5 2.00 0.71 An!hop/eura elegantissima - 0.5 0.5 1.5 0.62 0.63 Serpulidae 1.0 - - - 0.25 0.50 Hydroidolina - - 0.5 0.12 0.25 Pseudochama spp. - - 0.5 0.12 0.25 Substrates colonized rock 76.0 75.0 79.0 73.5 75.88 2.32 colonized cobble 19.0 15.5 7.5 15.5 14.38 4.87 rock 4.0 4.5 11.0 8.0 6.88 3.28 sand (shell gravel) - 4.0 2.5 2.0 2.12 1.65 cobble 1.0 1.0 - 1.0 0.75 0.50 c, ESLO2023-004 F-4

Appendix F Subtidal Algae Table FS. Subtidal algae (SLC Method) 2022 survey means (percent ~over), standard deviations and annual means, South Diablo Cove Station SDC 2 -3m (12-10).

Algae coralline crust 59.0 67.0 57.5 57.0 60.12 4.66

• non-coralline crust 9.5 9.5 . 9.5 8.5 9.25 0.50 Chrysophyta 10.0 0.5 4.0 0.5 3.75 4.48 filamentous.red algae complex 1.5 1.0 <0.1 <0.1 0.63 0.75 Calliarthron/Bossiefla spp.-complex 1.0 <0.1 1.0 0.5 0.63 0.48 Plerosiphonia dendroidea 0.5 <0.1 <0.1 0.13 0.25 Ectocarpales <0.1 * <0.1 <0.1 0.01 <0.01 Chlorophyta (filamentous) <0.1 <0.1 <0.1 <0.1 0.01 <0.01 Antithamnion!Plerothamnion spp.-complex <0.1 <0,1 <0.1 <0.0,1 <0.01 U/vaspp. <0.1 <0.1 <0.1 <0.01 <0.01 Acrosorium ci/iolatum <0.1 <0.1 <0.1 <0.01 <0.01 Rhodophyta Uuv. blades) <0.1 <0.1 <0.1 <0.01 <0.01 Cryptopleura vio/acea <0.1 <0.1 <0.01 <0.01 Codium fragile subsp. califomicum <0.1 <0.01 <0,01 Dictyota binghamiae <0.1 <0.01 <0.01 Laminariales <0:1 <0.01 <0.01 Rhodymenia spp. <0.1 <0.01 <0.01 Invertebrates Serpulorbis squamigerus 1.0 0.5 1.0 0.62 0.48 Phragmatopoma califomica 0.5 0.12 0.25 Substrates colonized rock 70.5 70.5 57.0 58.5 64.12 7.39 sand (shell gravel) 14.0 3.0 : 22.0 23.0 15.50 9.26 colonized cobble~ 7.0 6.5 12.0 9.0 8.62 2.50 cobble 4.0 12.5 5.0 6.5 7.00 3.81 rock 4.5 7.5 4.0 3.0 4.75 1.94 c, ESLO2023-004 F-5

Appendix F Subtidal Algae Table F6. Subtidal algae (SLC Method) 2022 survey means (percent cover), standard deviations and annual means, South Diablo Cove Station SDC 3 -4m (10-15).

Survey 196 *197 198 199 Survey Date 08-Feb-22 22-Jun~22 0t-Sep-22. 15-Dec-22

' *. Annual' Annual Taxon.

• Mtian Mean Mean Mean Mean _Std.Dey.

Algae coralline crust 64.0 65.0 69.0 63.5 65.38 2.50 non-coralline crust 2.5 3.5 3.5 3.5 3.2,5 0.50 Calliarthron/Bossiella spp. -complex 5.5 1.5 1.5 0.5 2.25 2.21 Chrysophyta <0.1 7.0 1.5 <0.1 2.13 3.32 filamentous red algae complex 2.5 <0.1 0.5 0.5 0.88 1.11 Ectocarpales <0.1 <0.1 0.5 - 0.13 0.25 Pterosiphonia dendroidea 0.5 <0.1 " <0.1 0.13 0.25 Rhodymenia spp. <0.1 0.5 <0.1 <0.1 0.13 0.25 Macrocystis pyrifera 0.5 - - 0.12 0.25 Chlorophyta (filamentous) <0.1 <0.1 <0.1 - <0.01 <0.01 Rhodophyta Ouv. blades) <0.1 <0.1 <0.1 <0.01 <0.01 U/vaspp. - <0.1 <0.1 - <0.01 <0.01 Cryptopleura vio/acea - <0.1 <0.1 - <0.01 <0.01 Bryopsis spp. <0.1 - <0.1 - <0.01 <0.01 Opuntiel/a califomica " <0.1 <0.1 - <0.01 <0.01 Acrosorium ciliolatum - - - <0.1 <0.01 <0.01 Antithamnion!Pterotham~ion spp. -complex - - - <0.1 <0.01 <0.01 Callophyl/is f/abellulata - <0.1 - - <0.01 <0.01 Callophyllis spp. - <0.1 " - <0.01 <0.01 Codium fragile subsp. californicum - <0.1 - <0.01 <0.01 Co/pomenia spp. - <0.1 - <0.01 <0.01 Oesmarestia tabacoides <0.1 - <0.01 <0.01

• Farlowia/Pikea spp.-complex . - <0.1 - <0.01 <0.01 Fauchea /aciniafa - <0.1 - <0.01 <0.01 Halicystis ova/is - - <0.1 <0.01 <0.01 Laminariales <0.1 - - - <0.01 <0.01 Masfocarpus papil/atus " - <0.1 " <0.01 <0.01 Weeksia spp. - - <0.1 - <0.01 <0.01 Invertebrates Phragmatopoma ca/ifomica 0.5 0.5 - 1.0 0.50 0.41 Serpulorbis squamigerus 0.5 - 0.5 1.0 0.50 0.41 Anthop/eura e/egantissima " - 1.0 0.5 0.38 0.48 Substrates colonized rock 68.0 70.0 68.5 65.0 67.88 2.10 rock 17.0 9.0 9.0 18.5 13.38 5.09 cobble 10.0 11.0 4.0 8.0 8.25 3.10 colonized cobble 3.5 7.0 7.5 4.5 5.62 1.93 sand (shell oravel) 1.5 3.0 11.0 4.0 4.88 4.21 C' ESLO2023-004 F-6

Appendix F - Subtidal Algae Table F7. Subtidal algae (SLC Method) 2022 survey means (percent cover), standard deviations and annual means, South Control Station SC 1 -3m (19-10).

.. Sµrvey 196 . *1~7** 19.8; I: .

• 199 . *" *. *.

+.

Surv.ef!Jilte ~* ~

O,t;;Feb-22*

r ~:

28-Jun-22; *'~9-Aug,lZ .. 08-Pec-2~ 1,..

I* ,, Annual Annual *..

p .*

Jaicon ' . .. .Mean Jl/leah. lllleiln **

I*

.Mean **. " .~e;h

,!~*

.. Sti:l.* oev.

Algae coralline crust 56,5 36.5 56.0 33,5 45.62 12.33 Cal/iarthron/Bossiella spp.-complex 40,0 38.5 44.5 41.5 41.12 2.56 Rhodymenia spp. 18.0 22.5 27.0 15.5 20,75 5.07 non-coralline crust 15.5 20.5 24.5 9.0 17.38 6.69 Cystoseira osmundacea 4.5 9.0 8.5 14.5 9.13 4.11 Chondracanthus corymbiferus 0.5 3.5 4.0 3,0 2.75 1.55 Far/owia/Pikea spp. -complex 1.5 2.0 5.0 1.5 2.51 1.68 Cryptopleura ruprechtiana <0.1 <0.1 4.0 4.5 2.13 2.46 Cryptopleura violacea 5.0 1.5 1.63 2.36 Plocamium pacificum 1.0 <0.1 1.0 1.5 0.88

• 0.63 P/erosiphonia dendroidea 0.5 1.0 0.5 <0.1 0.51 0.41 Fauchea laciniata <0,1 <0.1 0.5 0.5 0.26 0.29 Fredericqia chi/on <0.1 - 1.0 0.25 0.50 Prionitis spp. <0.1 <0.1 <0.1 0.5 0.13 0.25 Ahnfeltiopsis linearis <0,1 <0.1 0.5 <0,1 0.13 0.25 Ca/lophyllis f/abe/lulata <0.1 <0.1 <0.1 0.5 0.13 0.25 Callophy/fis spp. <0.1 0.5 <0.1 0.13 0.25 Clathromorphum parcum <0.1 0.5 <0.1 <0.1 0.13 0.25 filamentous red algae complex 0.5 <0.1 - - 0.13 0.25 Rhodophyta Ouv. blades) <0.1 <0.1 - 0.5 0.13 0.25 Halymenia/Schizymenia spp.-complex - - 0.5 - 0.13 0.25 Prionitis australis - 0.5 <0.1 0.13 0.25 Corallina chilensis / ,,, .. - 0.5 0.12 0.25 Gelid/um robustum <0.1 <0.1 <0.1 <0.1 0.01 <0.01 Colpomenia spp. <0.1 <0.1 <0.1 <0.01 <0.01 P/erygophora californica <0,1 <0.1 <0.1 <0.1 <0.01 <0.01 Halicysfis ova/is - - <0,1 <0.1 <0.01 <0.01 U/vaspp. - <0.1 <0.1 - <0.01 <0.01 Osmundea spp. <0.1 <0.1 <0.01 <0.01 Dictyoneurum califomicum <0.1 <0.1 <0.01 <0.01 Chiorophyta (filamentous) <0.1 <0.1 - <0.01 <0.01 Desmarestia tabacoides <0.1 <0.1 - <0.01 <0,01 Laminar/a setche/lii - - <0.1 <0.1 <0.01 <0.01 Laminariales <0.1 <0.1 - - <0.01 <0.01 Puget/a firma <0,1 - - - <0.01 <0.01 Sarcodiotheoa gaudiohaudii - - - <0.1 <0.01 <0.01 Weeks/a spp. - <0.1 - <0.1 <0.01 <0.01 Desmarestia ligulata <0.1 - <0.01 <0.01 Dictyota binghamiae - <0.1 - <0.01 <0.01 Egregia menziesii . - <0.1 <0.01 <0.01 Microc/adia cou/teri - - <0.1 <0.01 <0.01 Neoptilota spp. <0.1 - - <0.01 <0.01 Nereocystis luetkeana - <0.1 - <0.01 <0.01 Nienburgia andersoniana - - <0.1 <0.01 <0.01 Phy/lospadix spp. - <0.1 - - <0.01 <0,01 Porphyra spp. - <0.1 . - <0.01 <0.01 (table continued)

, . . ,ESLO2023-004 F-7

Appendix F Subtidal Algae Table F7 (continued). Subtidal algae (SLC Method) 2022 survey means (percent cover), standard deviations and annual means, South Control Station SC I -3m (19-10).

Survey 196 197 198 199 Survey Date 15-Apr-22 05-Jul~22 29-Aug-22 14~Oct-22 Annual Annual Taxon Mean Mean Mean Mean Mean Std. Dev.

Invertebrates Phragmatopoma californica 15.0 16.5 8.0 3.5 10.75 6.09 Tetraclita rubescens - 1.0 - 0.25 0.50 Substrates colonized rock 92.0 94.0 95.0 82.5 90.88 5.72 colonized cobble 3.5 4.5 3.0 14.5 6.38 5.45 cobble 2.5 0.5 1.0 - 1.00 1.08 rock 2.0 - 1.0 1.0 1.00 0.82 sand (shell aravell - 1.0 - 2.0 0.75 0.96 c, ESL02023-*oo4 F-8

Appendix F - Subtidal Algae Table F8. Subtidal algae (SLC Method) 2022 survey means (percent cover), standard deviations and annual means, South Control Station SC 2 -6m (20-20).

s Survey 196 :197 198 199 ':

• . Survey Date 11'-Mar-22 26.Ntay-22 17-Aug-i2 20-Dec-22 Annual Annual Taxon Mean Mean Mean Mean Mean Std. Dev.

Algae non-coralline crust 44.5 55.5 56.0 55.0 52.75 5.52 coralline crust 45.5 39.0 38.0 38.5 40.25 3.52 Chrysophyta 11.0 <0.1 <0,1 . 2.75 5.50 Cal/iarthron/Bossielfa spp.-complex 1.0 1.5 1.5 0.5 1.13 0.48 Pterosiphonia dendroidea 1.0 <0.1 0.5 0.5 0.51 0.41 Weeksia spp. <0.1 0.5 0.5 <0.1 0.26 0.29 Halicystis ova/is <0.1 <0.1 <0.1 <0,1 0.01 <0,01 Opunfiefla californica <0.1 <0.1 <0.1 <0.1 0.01 <0,01 Fauchea laciniata <0.1 <0.1 <0.1 <0.1 0.01 <0.01 Rhodymenia spp. <0.1 <0.1 <0.1 <0.1 0.01 <0.01 Cryptopleura viofacea <0.1 <0.1 <0.1 <0.01 <0.01 Puget/a firma <0.1 <0.1 <0.1 . <0.01 <0.01 Cal/ophyflis flabellufata <0.1 <0.1 - <0.1 <0.01 <0,01 U/vaspp. <0.1 - <0.1 <0.1 <0.01 <0.01 Antithamnion!Pterothamnion spp.-complex - <0.1 . - <0.01 <0.01 Chondracanthus corymbiferus <0.1 <0.1 <0.1 . <0.01 <0.01 Membranoptera!Branchioglossum spp. <0.1 <0.1 <0.1 <0.01 <0.01 Rhodophyta Uuv. blades) - <0.1 <0.1 <0.01 <0.01 Ca//ophy//is spp. <0.1 <0.1 - . <0.01 <0.01 Chlorophyta (filamentous) . <0.1 - <0.01 <0.01 Ectocarpales <0.1 - . <0.01 <0.01 Ha/ymenia/Schizymenia spp.-complex <0.1 - - - <0.01 <0.01 Laminariales <0.1 - - <0.01 .<0.01 Phaeophyta <0.1 . - . <0.01 <0.01 Desmarestia Jigufata <0.1 - - . <0.01 <0.01 filamentous red algae complex - <0.1 - - <0.01 <0.01 Prionitis spp. <0.1 - - <0.01 <0.01 Invertebrates Serpulorbis squamigerus 3.5 3.5 6.0 4.5 4.38 1.18 Tetraclita rubescens 1.0 - 0.5 - 0.38 0.48 Phragmatopoma californica - 0.5 - 0.5 0.25 0.29 Dodecaceria fewkesi - 0.5 - 0.12 0.25 Substrates colonized rock 80.0 89.0 85.0 92.0 86.50 5.20 colonized cobble 18.5 7.0 11.5 7.0 11.00 5.43 sand (shell gravel) .1.5 1.5 2.0 - 1.25 0.87 rock - 1.5 1.5 1.0 1.00 0.71 cobble - 1.0 - - 0.25 0.50 c, ESLO2023-004 F-9

Diab/a Canyon Power Plant Appendix G Subtidal Invertebrates

{SFQ Method)

" ' ESL02023-004

~ PG&E

• DCPP-RWMP 2022 Annual Report A-0

Appendix G - Subtidal Invertebrates Table Gl. Subtidal invertebrates (SFQ Method) 2022 survey means (abundance per 0.25 m 2; percent cover) standard deviations and annual means, Field's Cove Station FC 1 -3m (22-10) .

.:;1s~ .

.15-Apr*f Taxon *** **lvlea~*

Invertebrate Counts Strongy/ocentrotus purpuratus 9.3 18.0 5.0 5,5 9.44 6.02 Balanus/Tetraclila spp. 6.8 5.8 3.5 2.5 4.62 1.96 Ch/orostoma brunnea 11.8 1.8 3.0* 1.0 4.38 4.99 Pelecypoda boring 1.5 3.0 0.3 10.3 3.75 4.48 Lotliidae 2.3 4.3 3.3 3.3 3.25 0.82 Serpulidae 4.0 2.0 3.5 1.8 2.81 1.11 Acmaea mitra 1.8 2.8 2.0 1.3 1.94 0.62 Fissure/la volcano 1.5 3.0 2.3 1.0 1.94 0.88 Lottia ochracea 2.3 2.0 1.3 2.3 1.94 0.47 Sabellidae 0.5 2.3 1.8 2.3 1.69 0.83 Homolopoma /uridum/Lirularia succincta 1.3 1.3 0.62 0.72 Serpulorbis squamigerus 0.5 1.3 0.3 0.50 0.54 Diodora spp. 0.8 0.3 0.5 0.38 0.32 Anthozoa 0.3 1.0 0.31 0.47 Leptasterias spp. 0.3 0.3 0.5 0.25 0.20 Phragmatopoma califomica 1.0 0.25 0.50 Pseudochama spp. 0.8 0.3 0.25 .0.35 Anthopleura e/egantissima 0.3 0.3 0.3 0.19 0.12 Cirratulidae!Terebellidae 0.5 0.3 0.19 0.24 Epiactis prolifera 0.5 0.3 0.19 0.24 Eudistylia polymorpha 0,3 0.3 0.3 0.19 0.12 Pisaster/Henricia spp. Uuv.) 0.5 0.3 0.19 0.24 Aptyxis luteapictus 0.5 0.12 0.25 Octopus spp. 0.3 0.3 0.12 0.14 Patiria miniata 0.3 0.3 0.12 0.14 Sipuncula 0.5 0.12 0.25 Cancridae 0.3 0.06 0.12 Erataspp. 0,3 0.06 0.12 Hermissenda crassicamis 0.3 0.06 0.12 Hermissenda spp. 0.3 0.06 0.12 lschnochitonidae 0.3 0.06 0.12 I

Lissathuria nutriens 0.3 0.06 0.12 Megathura crenulata 0.3 0.06 0.12 Mitra idae 0.3 0.06 0.12 Nereididae 0.3 0.06 0.12 Ophiactis simplex 0.3 0.06 0.12 Pagurus spp. 0.3 0.06 0.12 Placipharella vela/a 0.3 0.06 0.12 Pododesmus cepio 0.3 0.06 0.12 Scyra acutifrons 0.3 0.06 0.12 Tonicel/a lineata 0.3 0.06 0.12 tunicates, compound/social <0.1 <0.1 <0.1 <0.1 0.01 <0.01 Porifera (encrusting) <0.1 <0.1 <0.1 <0.1 0.01 <0.01 Bryozoa (encrusting) * <0.1 <0.1 <0.1 0.01 0.01 Hydroidolina <0.1 <0,1 0.01 0.01 Spi rorbidae <0.1 <0.1 <0.01 <0.01 Didemnum!Trididemnum s <0.1 <0.01 <0.01 C' ESLO2023-0C>I G-1

Appendix G - Subtidal Invertebrates Table G2. Subtidal invertebrates (SFQ Method) 2022 survey means (abundance per 0.25 m 2; percent cover) standard deviations and annual means, North Diablo Cove Station NDC 2 -3m (8-10).

Su}vey 196 197 "198. 199 Survey Date 20.Jan-22 *2s-May-22 16-Aug-22 3-Oct-22 Annual Miian Taxon " Mean . Mean Mean .JVlean Meah Std. Dev.

Invertebrate Counts Strongyfocentrotus purpuratus 12.0 11.0 16.5 17.3 14.19 3.14 Ophiactls simplex 18.3 2.3 2.8 5.5 7.19 7.51 Fissuref/a volcano 5.3 5.8 6.8 3.8 5.38 1.25 Pelecypoda boring 11.0 1.3 1.5 1.0 3.69 4.88 Phragmatopoma ca/ifomica 7.0 1.3 3.8 3.00 3.09 Acmaea mitra 3.8 1.3 1.5 3.5 2.50 1.31 Anthozoa 1.8 3.0 3.0 2.0 2.44 0.66 Epiactis prolifera 2.5 - 3.3 1.3 1.75 1.43 .

Lottiidae 1.5 2.5 1.8 1.3 1.75 0.54 Sabellidae 1.5 1.8 2.5 1.3 1.75 0.54 Serpulidae 1.5 1.5 2.3 0.8 1.50 0.61 Lottie ochracea 0.5 1.3 1.8 0.3 0.94 0.69 Pistaspp. 1.0 1.5 - 0.5 0.75 0.65 Barleeia spp. . 1.8 0.44 0.88 Ophiothrix spicu/ala 0.3 0.8 0.5 0.3 0.44 0.24 Anthopleura e/egantissima 0.5 0.3 0.8 - 0.38 0.32 lschnochitonidae 0.3 - 0.8 0.3 0.31 0.31 Placiphorella velata 0.5 0.3 0.3 - 0.25 0.20 Pseudochama spp. 0.3 0.5 0.3 0.25 0.20 Lirobittium spp. 0.3 - 0.5 0.19 0.24 Si pun cu la 0.3 0.3 0.3 0.19 0.12 William/a peltoides 0.3 0.5 - 0.19 0.24 Anthop/eura artemisia 0.3 0.3 - - 0.12 0.14 Chaetopteridae a

- 0.5 - 0.12 0.25 Heptacarpus spp. 0.3 0.3 - 0.12 0.14 Mitraidae - 0.5 - 0.12 0.25 Nernertea - 0.3 0.3 0.12 0.14 Nereididae - - 0.3 0.3 0.12 0.14 Tonicella lineala 0.3 - 0.3 - 0.12 0.14 A/iaspp. - 0.3 0.06 0.12 Cirratulidaefferebellidae - - 0.3 0.06 0.12 Doriopsilla albopunctata - - - 0.3 0.06 0.12 Eulithidium spp. - 0.3 - 0.06 0.12 Lissothuria nutriens 0.3 - - 0.06 0.12 Lophopanopeus spp. - - 0.3 0.06 0.12 Ophiuroidea - 0.3 0.06 0.12 Pododesmus cepio 0.3 - - - 0.06 0.12 Scyra acutifrons - - 0.3 0.06 0.12 Serpu/orbis squamigerus 0.3 - . 0.06 0.12 C/athrina spp. 0.1 - <0.1 - 0.05 0.06 Porifera (encrusting) <0.1 <0.1 <0.1 <0.1 0.01 0,01 Leucetta /osangelensis <0.1 - <0.1 <0.1 0.01 0.01 Spirorbidae <0.1 <0.1 - <0.01 0.01 Bryozoa (encrusting} <0.1 - <0.1 <0.01 <0.01 Didemnum/Trididemnum spp. <0.1 - <0.01 <0.01 tunicates, compound/social - - - <0.1 <0.01 <0.01 C ESL02023_;,04 G-2

AppendixG

• Subtidal Invertebrates Table G3. Subtidal invertebrates (SFQ Method) 2022 survey means (abundance per 0.25 m 2; percent.cover) standard deviations and annual means, North Diablo Cove Station NDG 3 -3m (9-10).

19(f. 191 .* *' 199

.j~f=e~-22 23~Jun*2,2 Jaxon. II/lean Invertebrate Counts Barleeia spp. 3.5 85.0 22.12 41.95 Ophiactis simplex 3.8 13.3 8.8 17.8 10.88 6.01 Phragmatopoma califomica 17.0 5.0 2.3 3.0 6.81 6.89 strongylocentrotus piJrpuratus 5.0 6.3 6.3 7.5 6.25 1.02 Acmaea mitra 2.5 0.8 4.0 4.3 2.88 1.61 Anthopleura elegantissima 0.5 0.3 0.5 8.5 2.44 4.04 Fissure/la volcano 1.8 0,5 1.8 3.3 1.81 1.12 Anlhozoa 3.3 0.8 2.5 1.62 1.51 Pista spp. 0,8 3,3 2.0 0,5 1.62 1.27 Pelecypoda boring 1.8 1.8 0,8 1.06 0.85 Ophiothrix spiculata 0,8 0,5 1.5 0.8 0.88 0.43 Lott/a ochracea 0.8 1.3 0.8 0.5 0.81 0.31 Lissothuria nutriens 0.8 1.3 0.3 0.5 0.69 0.43 Loltiidae 0.8 1.3 0.8 0.69 0.52 Pseudochama spp. 0,5 0,8 0.8 0.50 0.35 Sabellidae 1.0 0.3 0,8 0.50 0.46 Serpulidae 0.8 0.3 0.5 0.5 0.50 0.20 Balanus/Tetraclita spp. 0.8 1.0 0.44 0.52 Chaelopteridae 1.0 0.25 0.50 Pferopurpura festiva 0.8 0.3 0.25 0.35 Sipuncula 0,3 0.3 0.5 0.25 0.20 Tonice/la lineata 0.3 0.8 0.25 0.35 Epiactis prolifera 0.3 0.5 0.19 0.24 Aliaspp. 0.3 0.3 0.12 0.14 Cucumaria spp. 0.3 0.3 0.12 0.14 lschnochitonidae 0.3 0,3 0.12 0.14 Ophiopteris papil/osa 0.3 0.3 0.12 0.14 Placiphorella velata 0.3 0.3 0.12 0.14 Pugettia spp. 0.5 0.12 0.25 Diodora spp. 0.3 0.06 0.12 Eudistylia polymorpha 0.3 0.06 0.12 Lacunaspp. 0.3 0.06 0.12 Lophopanopeus spp. 0.3 0.06 0.12 Mitra idae 0.3 0.06 0.12 Nemertea 0.3 0.06 0.12 Paraxanthias taylori 0.3 0.06 0.12 Phidiana hiltoni 0.3 0.06 0.12 Pododesmus cepio 0.3 0.06 0.12 Roma/eon jordani 0.3 0.06 0.12 Scyra acutifrons 0.3 0.06 0.12 Serpulorbis squamigerus 0.3 0.06 0.12 Clathrina spp. <0.1 <0.1 0.03 0.04 Bryozoa (encrusting) <0.1 <0.1 <0.1 <0.1 0.01 0.01 Porifera (encrusting) <0.1 <0.1 <0.1 <0.1 0.01 0.01 Spirorbidae <0.1 <0.1 <0.1 <0.1 0.01 <0,01 tunicates, com ound/social <0.1 <0.1 <0.1 <0.1 0.01 <0.01 (table continued)

C' ESLO2023-0CM G-3

Appendix G - Subtidal Invertebrates Table G3 (continued). Subtidal invertebrates (SFQ Method) 2022 survey means (abundance per 0.25 m 2; percent cover) standard deviations and annual means, North Diablo Cove Station NDC 3 -3m (9-10) .

survey 196

.. 197 198 199 Survey Pate 14-Feb-22 23-Jun-22 ,1$~Aug-22 *16-Dec-22

' Annual Mean Taxon Mean Mean . Maan Mean *Mean *Std.Dev.

Invertebrate Counts (continued)

Hydroidolina <0.1 - <0.1 <0.1 0.01 0.01 Didemnum!Trididemnum soo. - - <0.1 - <0.01 <0.01 C' E$LO2023-004 G-4

Appendix G -_Subtidal Invertebrates Table G4. Subtidal invertebrates (SFQ Method) 2022 survey means (abundance per 0.25 m 2; percent cover) standard deviations and annual means, North Diablo Cove Station NDC 4 -4m (9-15).

Phragmatopoma califomica 24.5 16.3 22.0 25.8 22.12 4.22 Pelecypoda boring 26,0 23.0 11.8 25.0 21.44 6.58 Strongy/ocentrotus purpuratus 20.3 18.5 25.0 20.5 21.06 2.77 Ophiactis simplex 10.0 3.3 21.8 29.5 16.12 11.74 Ophiothrix spiculata 2.8 2.5 7.0 6.~ 4.69 2.39 Serpulidae 4.8 4.5 4.5 3.8 4.38 0.43 Fissure/la volcano 2.3 8.0 4.5 2.0 4.19 2.78.

Lottiidae 1.0 2.8 6.8 4.3 /3.69 2.44 Acmaea mitra

• 2.5 1.8 2.0 4.3 2.62 1.13 Lottia ochracea 1.5 1.8 5.5 1.3. 2.50 2.01 Balanus/Tetraclita spp. 0.8 1.3 5.0 1.0 2.00 2.01 Williamia peltoides 0,8 0.5 0.3 3.3 1.19 1.39 Serpulorbis squamigerus 0,5 1.5 ).3 J.3 1.12 ' 0.43 Anthop/eura elegantissima 1.0 1.0 1.0 1.3 1.06 0.12 Pseudochama spp. 1.0 0.8 0.5 1.8 1.00 0.54 Sabellidae 1.0 0.8 1.3 0.8 0.94 0.24 Pistaspp. 2.0 0.5 0.8 0.81 0.85 Lissothuria nutriens 0.5 0.8 0.8 0.50 0.35 Sipuncula 0.5 0.8 0.8 0.50 0.35 Chaetopteridae 1.3 0.3 0.38 0,60 Epiactis* prolifera 1.5 0.38 0.75 Pododesmus cepio 0.5 0.3 0,5 0.3 0.38 0.14 Placiphorel/a velata 0,8 0.5 0.31 0.38 Diodora spp. 0.5 0.5 0.25 0.29 Mitra idae 0.3 0.3 0.3 0.19 0.12 Crassadoma gigantea 0.5 0.12 0.25 lschnochitonidae 0.5 0.12 0.25 Amphissa spp. 0.3 0.06 0.12 Anthozoa 0.3 0.06 0.12 Ci rratulidae/Terebellidae 0.3 0.06 0.12 Cypraea spadicea 0,3 0.06 0.12 Eudistylia polymorpha 0.3 0.06 0.12 Lophopanopeus spp. 0.3 0.06 0.12 Nereididae 0.3 0.06 0.12 Ophioplocus esmarki 0.3 0.06 0.12 Ophiopteris papillosa 0.3 0.06 0.12 Scyra acutifrons 0.3 0.06 0.12 Strongylocentrotus franciscanus 0.3 0.06 0:12 Hydroidolina <0.1 <0.1 <0,1 <0.1 0.02 <0.01 Porifera (encrusting) <0.1 <0.1 <0.1 <0.1 0.02 0.01 Clathrina spp. <0.1 0.02 0.03 Bryozoa (encrusting) <0.1 <0.1 <0.1 <0.1 0.01 0.01 tunicates, compound/social <0.1 <0.1 <0.1 0.01 0.01 S irorbidae <0.1 <0.1 <0.01 <0.01

"'I., ESLO2023-004 G-5

Appendix G - Subtidal Invertebrates Table GS. Subtidal invertebrates (SFQ Method) 2022 survey means (abundance per 0.25 m 2; percent cover) standard deviations and annual means, South Diablo Cove Station SDC 2 -3m (12-10).

Surv~y 196 197 198 199 Survey Date 25-Mar-22 8-Jul-22 2-Aug-22 21-Qct-22 Annual Mean

\

Taxori 'Mean Mean .Mean Mean Mean Sta. Dev.

Invertebrate Counts Strongy/ocentrotus purpuratus 14.0 14.8 16.8 ff8 15.81 t74 Pelecypoda boring ff5 6.8 5.8 3J 8.31 6JO Ophiactis simplex ms 8.8 3.8 6.8 7.50 2.99 Serpulorbis squamigerus 6.5 5.8 15 7.0 5.69 t55 Serpulidae 4.0 4.0 4.5 5.0 4.38 0.48 Ophiothrix spiculata BJ OJ 3B 35 3.94 129 Sabellidae t8 t8 1.0 2.3 1.69 0.52 Acmaea mitra 2.0 1.8 1.5 1.0 1.56 0.43 Diopatra ornata 2.5 0.5 1.5 1.5 1.50 0.82 Pis/a spp. 2.0 0.5 2.3 1.3 1.50 0.79 Lottia ochracea 0.3 1.8 2.8 0.5 1.31 1.16 Ophiopteris papil/osa 2.0 - 0.5 1.8 1.06 0.97 Phragmatopoma californica 0.3 - - 2.8 0.75 1.34 Lissothuria nutriens 1.3 0.3 0.3 0.8 0.62 0.48 Wil/iamia peltoides 0.8 1.3 0.5 - 0.62 0.52 Chaetopteridae - 0.3 0.3 1.8 0.56 0.80 Lottiidae 0.3 0.3 1.0 0.5 0.50 0.35 Patiria miniata 0.3 1.0 0.3 0.5 0.50 0.35 Sipuncula 0.5 0.5 0.8 0.3 0.50 0.20 Balanus!Tetrac/ita spp. 0.3 0.8 - 0.8 0.44 0.38 Fissure/la volcano - 1.3 - 0.5 0.44 0.59 Pseudochama spp. 0.3 0.3 1.0 0.3 0.44 0.38 Mitra idae 0.8 0.5 0.3 - 0.38 0.32 Conus ca/ifornicus 0.3 0.8 0.3 - 0.31 0.31 Cucumaria spp. - - 1.0 0.3 0.31 0.47 Cirratulidae!Terebellidae - 0.5 0.3 0.3 0.25 0.20

. Placiphorel/a vela/a - - - 0.8 0.19 0.38 P/eropurpura festiva - - 0.5 0.3 0.19 0.24 Strongy/ocentrotus franciscanus - - 0.5 0.3 0.19 0.24 Amphissa spp. - - - 0.5 0.12 0.25 Anthop/eura e/egantissima 0.3 0.3 - - 0.12 0.14 Balanophyllia elegans - - - 0.3 0.06 0.12 Diodora spp. - 0.3 - - 0.06 0.12 Epiactis pro/ifera - 0.3 - - 0.06 0.12 Haliotis spp. - - 0.3 - 0.06 0.12 lschnochitonidae - - - 0.3 0.06 0.12 Lepidozona spp. 0.3 - - - 0.06 0.12 Leptasterias spp. 0.3 - - - 0.06 0.12 Loxorhynchus spp. - - - 0.3 0.06 0.12 Madia/us spp. 0.3 - - - 0.06 0.12 Pagurus spp. 0.3 - - - 0.06 0.12 Panda/us spp. - - - 0.3 0.06 0.12 Bryozoa (encrusting) <0.1 <0.1 - <0.1 0.01 0.01 Porifera (encrusting) <0.1 <0.1 - <0.1 0.01 0.01 tunicates, compound/social - <0.1 <0.1 <0.1 <0.01 <0.01 Acanthancora cyanocrypta <0.1 - - <0.1 <0.01 <0.01 C' ESLO2023-004 G-6

Appendix G - Subtidal Invertebrates Table G6. Subtidal invertebrates (SFQ Method) 2022 survey means (abundance per 0.25 m 2; percent cover) standard deviations and annual means, South Diablo Cove Station SDC 3 -4m (10-15).

>. Survey* 1 ' 19~

• 197 '

, . * *,, ,

• SurveyDate ,08°Feb,22 , WJun~2'.

,198 *, I.. 199 .

01~S~p'.22'. . i15*Dec~i2 " 1'.

1, ** * "' * * . **

,, ' ~ ,  :'

0

• , ';* Annual* Mean *

. .Mean Mean. I. , Me~n .  :: , Std: oe'v. ,

Invertebrate Counts Strongylocentrotus purpuratus 16.5 20.0 25.3 16.5 19.56 4.14 Balanophy/Jia e/egans 13.3 15.3 18.0 16.3 15.69 1.98 Pelecypoda boring 13.0 14.0 5.8 0.3 8.25 6.48 Ophiactis simplex 8.8 8.5 3.5 5.3 6.50 2.56 Phragmatopoma californica 5.8 1.8 12.5 1.0 5.25 5.26 Corynactis californica 3.0 5.0 4.0 4.0 4.00 0.82 Serpulorbis squamigerus 4.0 3.0 3.0 4.8 3.69 0.85 Anthop/eura e/egantissima 3.0 1.8 2.5 2.3 2.38 0.52 Cucumaria spp. 2.8 2.0 4.5 2.31 1.86 Serpulidae 1.5 2.3 2.8 2.0 2.12 0.52 Sabellidae 5.0 1.0 1.5 1.88 2.17 Paracyathus stearnsii 1.5 0.8 1.3 0.5 1.00 0.46 Acmaea mitra 0.3 1.5 1.5 0.81 0.80 Pseudochama spp. 0.5 2.0 . 0.5 0.3 0.81 0.80 Pis/a spp. 1.3 0.5 1.3 0.75 0.61 Mitraidae 1.5 0.3 0.8 0.62 0.66 Pferopurpura festiva 1.3 0.5 0.8 0.62 0.52 Balanus/Tetraclita spp. 0.3 1.5 0.44 0.72 Sipuncula 0.5 1.0 0.3 0.44 0.43 Ophiopteris papillosa 0.8 0.3 0.5 0.38 0.32 Ganus californicus 0.3 0.5 0.3 0.3 0.31 0.12 D~opatra ornata 0.5 0.8 0.31 0.38 Ophiothrix spiculata 0.3 0.3 0.8 0.31 0.31 Anthop/eura artemisia 0.8 0.3 0.25 0.35 Cirratulidae/Terebellidae 0.5 0.3 0.19 0.24 Hipponix spp. 0.8 0.19 0.38 Pagurus spp.' 0.5 0.3 0.19 0.24 Placiphorel/a vela/a 0.3 0.3 0.3 0.19 0.12 Pododesmus cepio 0.3 0.3 0.3 0.19 0.12 Anthozoa 0.3 0.3 0.12 0.14 Doriopsilla albopunctata 0.3 0.3 0.12 0.14 Hermissenda crassicornis 0.5 0.12 0.25 Homolopoma luridum!Lirularia succincta 0.5 0.12 0.2~

lschnochitonidae 0.5 0.12 0.25 Kelletia kelletii 0.5 0.,12 0.25 Lissothuria nutriens 0.3 0.3 0.12 0.14 Lottiidae 0.3 0.3 0.12 0.14 Majidae 0.3 0.3 0.12 0.14 Roma/eon antennarius 0.5 0.12 0.25 Tonicel/a lineata 0.3 0.3 0.12 0.14 Williamia peltoides 0.3 0.3 0.12 0.14 Amphissa spp. 0.3 0.06 0.12 Dendropoma spp. 0.3 0.06 0.12 Diodora spp. 0.3 0.06 0.12 Eupentacta quinquesemita 0.3 0.06 0.12 (table continued)

C' ESLO2023-004 G-7

Appendix G Subtidal Invertebrates Table G6 (continued). Subtidal invertebrates (SFQ Method) 2022 survey means (abundance per 0.25 m 2; percent cover) standard deviations and annual means, South Diab lo Cove Station SDC 3 -4m (I 0-15).

Survey 196 197. . 198 1~9 Survey Date 08-feb*22 22-Jun.22* .01-Sep.22 15-Dec-22 H b Annual Mean

• Taxon Mean Mean Mean Mean Mean -Std..Dev.

Invertebrates Counts (continued)

Haliotis spp. 0.3 . 0.06 0.12 Heptacarpus spp. - - 0.3 - 0.06 0.12 Urobittium spp. 0.3 - - 0.06 0.12 Patiria miniata - 0.3 - - 0.06 0.12 Phoronis spp. - 0.3 - - 0.06, 0.12 Pisaster giganteus - 0.3 - 0.06 0.12 Roma/eon jordani - 0.3 - 0.06 0.12 Scyra acutifrons - 0.3 - 0.06 0.12 Strongy/ocentrotus franciscanus - 0.3 - 0.06 0.12 Bryozoa (encrusting) <0.1 <0.1 <0.1 <0.1 0.02 0.01 Porifera (encrusting) <0.1 <0.1 <0.1 <0.1 0.02 0.01 C/athrina spp. <0.1 - - 0.02 0.03 Hydroidolina <0.1 <0.1 - - 0.01 0.01 Spirorbidae <0.1 - <0.1 0.01 0.01 tunicates, compound/social <0.1 <0.1 <0.1 . 0.01 0,01 Acanthancora cvanocrvota <0.1 - <0.1 - <0.01 <0,01 fl' ESLO2023-004 G-8

Appendix G - Subtidal Invertebrates Table G7. Subtidal invertebrates (SFQ Method) 2022 survey means (abundance per 0.25 m 2 ; percent cover) standard deviations and annual means, South Control Station SC 1 -3m (19-10).

s C , , > , , , ~;: ,,,,

survey. 196 *197 ,*, 198 199 '.

. Survey Datl! 04-Feb-22 . 28,Jun-22 09-ALig;~:z OQ 0Dec,22 ',*

• ' '* An°nual *. Mean

. Taxon *. . .. **.* Mean Mean.. Mec!n

• Mean . - .Mean, .* Std! Oev.

Invertebrate Counts Pfiragmatopoma californica 38.8 9.5 4.8 28.3 20.31 15.94 Homolopoma luridum!Lirularia succincta 12.0 12.5 10.8 8.8 11.00 1.67 Pagurus spp. 12.5 2.0 11.0 13.8 9.81 5.33 Chlorostoma brunnea 15.3 6.0 7.0 7.0 8.81 4.32 Balanus/Tetraclita spp. 12.3 4.5 4.8 6.5 ,, 7.00 3.61 Strongylocentrotus purpuratus 7.3 3.3 4.0 5.0 4.88 1.74 Leptasterias spp. 3.0 1.0 1.5 1.0 1.62 0.95 Acmaea mitra 1.5 1.3 1.3 1.3 1.31 0.12 Tonicel/a lineata 1.5 0.8 0.8 1.0 1.00 0.35 Calliostoma ligatum 0.5 0.5 0.8 1.5 0.81 0.47 Pugettia spp. 0.5 0.3 0.8 1.5 0.75 0.54 Serpulidae 0.5 0.3 - 1.8 0.62 0.78 Crepidula spp. 0.3 1.3 0.8 - 0.56 0.55 Alia spp. 0.8 - 0.5 0.8 0.50 0.35 Scyra acutifrons 0.3 0.3 0.3 1.3 0.50 0.50 Amphissa spp. 0.8 0.3 0.3 0.5 0.44 0.24 Anthopleura elegantissima - 0.3 0.3 1.0 0.38 0.43 Cryptolithodes sitchensis 1.0 0.3 0.3 - 0.38 0.43 Ocinebrina spp. 0.3 0.3 0.5 0.5 0.38 0.14 Patiria miniata 0.3 0.3 0.8 0.3 0.38 0.25 Lissothuria nutriens 0.5 0.3 - 0.3 0.25 0.20 Lophopanopeus spp. 0.3 - 0.5 0.3 0.25 0.20 Lottiidae - 0.5 0.5 - 0.25 0.29 Sabellidae 0.3 0.5 - 0.3 0.25 0.20 Conus ca/ifomicus - 0.5 0.3 - 0.19 0.24 Cryptochiton stelleri 0.3 0.3 - 0.3 0.19 0.12 Diopatra omata 0.3 0.3 0.3 - 0.19 0.12 Lottia ochracea - - 0.8 - 0.19 0.38 Pisaster!Henricia spp. Uuv.) 0.3 0.3 0.3 - 0.19 0.12 Pseudomelatoma torosa 0.5 0.3 - - 0.19 0.24 Aptyxis luteopictus - 0.3 - 0.3 0.12 0.14 Balanophyllia elegans - - 0.3 0.3 0.12 0.14 Chlorostoma montereyi - - - 0.5 0.12 0.25 Epiactis prolifera - 0.3 0.3 - 0.12 0.14 Eupentacta quinquesemita - 0.3 - 0.3 0.12 0.14 Lirobittium spp. - - - 0.5 0.12 0.25 Mimulus foliatus 0.5 - - - 0.12 0.25 Mitraidae - 0.3 0.3 - 0.12 0.14 Ophioplocus esmarki 0.3 0.3 - - 0.12 0.14 Pomaulax gibberosa 0.3 0.3 - - 0.12 0.14 Pseudochama spp. 0.5 - - - 0.12 0.25 Brachyuran - - - 0.3 0.06 0.12 Chelyosoma productum - 0.3 - - 0.06 0.12 Eratospp. - - 0.3 - 0.06 0.12 Eulithidium soo. - 0.3 - - 0.06 0.12 (table continued)

C' ESLO2023-004 G-9

Appendix G - Subtidal Invertebrates Table G7 (continued). Subtidal invertebrates (SFQ Method) 2022 survey means (abundance per 0.25 m 2; percent cover) standard deviations and annual means, South Control Station SC 1 -3m (19-10) .

.: -*z*19s*.* >/ -cl97 _ * ; ____ ~198 ,~ -: .: :199 : - -

<0~~Fe.b-~2 * :.**2~.-~uns2? *. 09~A4g,22 - ,.09:~P.ec~22 Ann4al: *Mean*

il:axort, .:Mean Mean* , Mean .

• Me~11_* -*MQ~rt ,Std.,~~y..

Invertebrate Counts (continued)

Fissure/la volcano 0.3 0.06 0.1*2 lschnochitonidae 0.3 0.06 , 0.12 Lepidozona spp. 0.3 - 0.06 0.12 Majidae . 0,3 0.06 0.12 Mopalia spp. 0.3 0.06 0.12 Paraxanthias taylori 0.3 0.06 0.12 Pododesmus cepio 0.3 0.06 0.12 Promartynia pul/igo 0.3 0.06. 0.12 Roma/eon antennarius 0.3 0.06 0.12 Porifera (encrusting) <0.1 <0.1 <0.1 <0.1 0.03 <0.01 Bryozoa (encrusting) <0.1 <0.1 <0.1 <0.1 0.02 0.01 tunicates, compound/social <0.1 <0.1 <0.1 <0.1 0.02 0.01 Didemnum!Trididemnum spp. <0.1 <0.1 <0.1 <0.1 0.01 <0.01 S irorbidae <0.1 <0.1 <0.1 0.01 0.01 C'* 1  :

ESLO2023~004 G-10

Appendix G Subtidal Invertebrates Table G8. Subtidal invertebrates (SFQ Method) 2022 survey means (abundance per 0.25 m2 ; percent cover) standard deviations and annual means, South Control Station SC 2 -6m (20-20).

Sunley,

• 196  :.191*) ***.WB,

• 199,:

S\Jrvey Date

• f1!Mar-2i . 21Hli1ay~2i . t1-A4~:.22..

• 20,11l~f:22*

TiQCofl . ' ,I -Meari: .IVl~lli1:, '. ' M~ai Invertebrate Counts Serpuforbis squamigerus 30.8 27.5 20.5 25.3 26.00 4.31 Homolopoma /uridum!Lirularia succincta 2.3 5.8 10.0 7.0 6.25 3.21 Strongy/ocentrotus purpuratus 4.0 6.5 5.8 5.0 5.31 1.07 Acmaeamitra 3.3 4.3 5.0 8.3 5.19 2.16 Chlorostoma brunnea '6.8 2.8 5.3 6.0 5.19 1.74 Serpulidae 4.8 5.0 5.0 4.5 4.81 0.24 Phragmatopoma ca/ifomica 9.8 1.0 0.5 7.8 4.75 4.69 Balanus/Tetraclitaspp. 6.8 1.5 2.0 2.8 3.25 2.39 Ca/liostoma /igatum 3.3 3.0 4.0 2.8 3.25 0.54 Cucumaria spp. 2.3 1.3 6.8 - 2.56 2.94 Ophiothrix spiculata 0.3 1.3 2.8 2.5 1.69 1.16 Sabellidae 1.5 1.8 2.3 0.8 1.56 0.62 Tonice/la lineata 1.3 1.0 1.3 1.5 1.25 0.20 Williamia pe/toides 0.3 0.5 2.0 0.5 0.81 0.80 Lottiidae 0.8 0.3 1.0 0.8 0.69 0.31 Pagurus spp. - 0.8 - 2.0 0.69 0.94 Co,ynactis califomica 1.3 0.8 0.5 - 0.62 0.52 Tethya californiana 0.5 0.5 0.5 0.5 0.50 <0.01 Leptasterias spp. 0.3 0.5 0.8 0.3 0.44 0.24 Promartynia pulligo 0.5 0.5 0.5 0.3 0.44 0.12 Balanophy/Jia elegans 0.5 0.5 0.3 0.3 0.38 0.14 Eudistylia po/ymorpha 0.5 0.5 0.3 0.3 0.38 0.14 lschnochitonidae 0.3 0.8 0.5 - 0.38 0.32 Lottia ochracea 0.5 0.5 0.5 0.38 0.25 Aptyxis luteopictus 0.5 0.3 - 0.5 0;31 0.24 C/avelina huntsmani -

• 1.3 - - 0.31 0.62 Diodora spp. - 0.8 0.5 - 0.31 0.38 Anthop/eura elegantissima 0.3 0.5 0.3 - 0.25 0.20 Chlorostoma montereyi - 0.3 0.5 0.3 0.25 0.20 Pelecypoda boring 1.0 - - - 0.25 0.50 Ceratostoma foliatum 0.3 0.5 - - 0.19 0.24 Crassadoma gigantea - 0.3 - 0.5 0.19 0.24 Eupentacta quinquesemita 0.5 0.3 - - 0.19 0.24 Lepidozona spp. 0.8 - - - 0.19 0.38 Ocinebrina spp. 0.3 0.3 - 0.3 0.19 0.12 Ophioplocus esmarki ,. - 0.5 - 0.3 0.19 0.24 Anthozoa - 0.5 - - 0.12 0.25 Cirratulidaefferebellidae - - 0.3 0.3 0.12 0.14 Cnemidocarpafinmarkiensis - 0.3 0.3 - 0.12 0.14 Crepidula spp. - 0.3 0.3 - 0;12 0.14 Diopatra ornata 0.5 - - - 0.12

• 0.25 Fissurelia volcano 0.3 0.3 - 0.12 0.14 Mitraidae 0.3 0.3 - - 0.12 0.14 Patiria miniata - 0.3 0.3 - 0.12 0.14 Pisaster!Henricia~p. Quv.) 0.3 0.3 - 0.12 0.14 (table continued}

~ ESLO2023-004 G-11

Appendix G - Subtidal Invertebrates Table GS (continued). Subtidal invertebrates (SFQ Method) 2022 survey means (abundance per 0.25 m 2; percent cover) standard deviations and annual means, South Control Station SC 2 -6m (20-20).

Survey 196 197 198 199 C

• Survey Date 11-Mar:22 26-May-22 17-Aug-22 20-Dec-22 Annu.al Mean Taxon Mean Mean Mean Mean Mean Std. Dev.

Invertebrate Counts (continued)

Pistaspp. - - - 0.5 0.12 0.25 Pseudochama spp. 0.5 - - - 0.12 0.25 Strongy/ocentrotus franciscanus - - 0.3 0.3 0.12 0.14 Amphissa spp. 0.3 - - - 0.06 0.12 Boltenia vil/osa - - - 0.3 0.06 0.12 Conus califomicus - - 0.3 - 0.06 0.12 Cryptochiton stelleri - 0.3 - - 0.06 0.12 Ha/iotis spp. - - 0.3 - 0.06 0.12 Nemertea - - - 0.3 0.06 0.12 Nereididae - - 0.3 - 0.06 0.12 Ophiopteris papil/osa - - - 0.3 0.06 0.12 Paraxanthias tay/ori - - - 0.3 0.06 0.12 Pseudomelatoma torosa 0.3 - - - 0.06 0.12 Pyura haustor 0.3 - - - 0.06 0.12 Sipuncula - - 0.3 - 0.06 0.12 tunicates, compound/social 4.9 7.1 <0.1 <0.1 3.01 3.57 Bryozoa (erect) 0.3 - - - 0.06 0.13 Bryozoa (encrusting) <0.1 <0.1 <0.1 <0.1 0.02 <0.01 Porifera (encrusting) <0.1 <0.1 <0.1 <0.1 0.02 <0.01 Hydroidolina - <0.1 <0.1 - <0.01 0.01 Spirorbidae <0.1 - - <0.1 <0.01 0.01 Didemnumfrrididemnum spp. <0.1 <0.1 - - <0.01 <0.01 Salmacina tribranchiata <0.1 - - - <0.01 0.01 t' ESLO2023-004 G-12

Diab/a Canyon' Power Plant Appendix H Subtidal Fishes (SFO Method)

, , ESLO2023-004 W PG&E

• DCPP-RWMP 2022 Annual Report . A-0

Appendix H - Subtidal Fishes Table Hl. Subtidal fishes 2022 survey means (abundance per 50 x 4 x 2 m transect), standard deviations and annual means, Field's Cove Stations (FC FO-1 (1), FC FO-2 (2), FC FO-3 (3)).

Survey 194 195 196 197 Survey bate 18-Mar-22 12-Jul-22 6-Sep-22 21-Oct-22 Annual Annual Taxon Mean Mean Mean Mean Mean Std. Dev.

Midwater larval/post-larval fish - <0.1 1.6 - 0.42 0.78 Oxyjulis californica - 0.3 0.9 - 0.31 0.43 Gire/la nigricans - 0.6 <0.1 - 0.17 0.28 Paralabrax c/athratus <0.1 0.2 <0.1 0.2 0.12 0.05 Sebastes chrysome/as!S. carnatus (yoy) - 0.5 - - 0.12 0.25 Sebastes mystinus (yoy) - - <0.1 0.2 0.06 0.08 Embiotoca jacksoni <0.1 - - <0.1 0.04 0.05 Embiotoca /a/era/is - - <0.1 - 0.02 0.04 Rhacochilus vacca Uuv.) - - - <0.1 0.02 0.04 Sebastes serranoides Uuv.) - - - <0.1 0.02 0.04 Benthic Oxylebius pie/us 4.8 4.7 9.8 7.8 6.75 2.45 Sebastes mystinus Uuv.) . 2.7 0.9 0.9 2.1 1.65 0.88 Se~astes mystinus (yoy) - 1.0 1.5 1.6 1.02 0.73 Rhinogobiops nicho/sii 0.3 0.6 1.5 0.8 0.81 0.50 Para/abrax c/athratus 0.8 0.6 1.0 0.7 0.75 0.18 Embiotoca jacksoni 0.5 0.5 1.0 0.5 0.62 0.25 Gibbonsia spp. <0.1 0.6 0.5 1.2 0.60 0.48 Sebastes serranoides/S. f/avidus (yoy) - 1.3 0:6 - 0.48 0.63 Sebastes chrysomelas 0.2 0.7 0.8 0.2 0.46 0.29 Sebastes mystinus - <0.1 1.4 0.2 0.42 0.67 Semicossyphus pu/cher <0.1 1.0 0.3 <0.1 0.38 0.43 Artedius spp. - 0.4 0.2 0.5 0.27 0.23 Oxyju/is californica <0.1 0.8 - - 0.21 0.36 Sebastes me/anops (yoy) - 0.5 0.3 - 0.21 0.25 Scorpaenichthys marmoratus <0.1 0.2 - 0.5 0.19 0.22 Embiotoca la/era/is 0.2 0.2 0.2 - 0.17 0.12 Sebastes rastrel/iger 0.2 0.3 <0.1 - 0.15 0.14 Sebastes chrysomelas Uuv.) - - 0.5 - 0.12 0.25 Gire/la nigricans - 0.4 - - 0.10 0.21 Ophiodon elongatus - - 0.2 0.2 0.10 0.12 Sebastes chrysomelas/S. carnatus (yoy) <0.1 0.2 0.2 - 0.10 0.08 Embiotoca jacksoni Uuv.) <0.1 <0.1 - 0.2 0.08 0.07 Rhacochi/us toxotes 0.2 <0.1 - - 0.08 0.12 Rhacochilus vacca - - 0.2 <0.1 0.08 0.12 Sebastes miniatus Uuv) - 0.3 - - 0.08 0.17 Sebastes atrovirens <0.1 - - 0.2 0.06 0.08 Psychrolutidae Uuv.) - 0.2 - - 0.04 0.08 Rhacochilus vacca Uuv.) - - <0.1 <0.1 0.04 0.05 Sebastes me/anops Uuv.) - - 0.2 - 0.04 0.08 Sebastes serranoides - 0.2 - - 0.04 0.08 Sebastes serranoides Uuv.) - - - 0.2 0.04 0.08 Anoplarchus purpurescens - <0.1 - - 0.02 0.04 Bothragonus swanii - - <0.1 - 0.02 0.04 Cebidichthys vio/aceus <0.1 - - - 0.02 0.04 Orthonopias triacis - - - <0.1 0.02 0.04 (table contmued) t' ESLO2023-004 H-1

Appendix .H - Subtidal Fishes Table Hl (continued). Subtidal fishes 2022 survey means (abundance per 50 x 4 x 2 m transect), standard deviations and annual means, Field's Cove Stations (FC FO-1 (1), FC FO-2 (2), FC FO-3 (3)).

1

!Jaxbn.'

Benthic (continued)

Sebastes camatus <0.1 0.02 0.04 Sebastes chrysomelas!S. camatus <0.1 0.02 0.04 Urobatis halleri <0.1 0.02 0.04

• )

t" ESLO2023-004 H-2

Appendix H Subtidal Fishes Table H2. Subtidal fishes 2022 survey means (abundance per 50 x 4 x 2 m transect), standard deviations and annual means, North Diablo Cove Stations (NDC F0-1 (5), NDC F0-2 (6), NDC F0-3 (7)) .

Survey 194 195 196 191 Survey Date 18-Mar-22 12.Ju{:22 6sSep-22. 21-Oct-22 Annual Annual Taxon Mean Mean Mean Mean Mean Std. Dev.

Midwater larval/post-larval fish - - 25.1 0.7 6.44 12.43 Para/abrax clathratus 1.2 0,6 0.7 0.7 0.79 0.31 Chromis punctipinnis - 0.2 1.7 0.2 0.50 0.78 Gire/la nigricans 1.2 0.4 0.2 0.2 0.48 0.47 Hypsypops rubicundus 0.3 0.5 - - 0.21 0.25 Medialuna califomiensis 0.4 0.2 - - 0.17 0.20 Semicossyphus pu/cher 0.2 - <0.1 0.3 0.15 0.14 Hermosilla azurea 0.3 - - - 0.08 0.17 Embiotoca jacksoni - - - 0.2 0.06 0.12 Embiotoca /ateralis 0.2 - - 0.04 0.08 Rhacochi/us vacca 0.2 - - - 0.04 0.08 Chromis punctipinnis Ouv.) <0.1 - - -

• 0.02 0.04 Benthic Rhinogobiops nicho/sii 4.2 4.1 6.8 8.4 5.88 2.09 Oxy/ebius pictus 4.4 2.1 4.7 7,2 4.60 2.11 Paralabrax clathratus 4.8 2.2 3,2 2.1 3.08 1.26 Hypsypops rubicundus 3.2 1.4 2.0 2.2 2.21 0.77 Semicossyphus pu/cher 3.9 <0,1 0.8 0.8 1.38 1.72 Gire/la nigricans 3.0 0.9 1.1 <0.1 1.27 1.23 Embiotoca jacksoni 0.9 0.8 1.0 1.2 0.98 0.14 Gibbonsia spp. 0.2 0.2 0.4 2.4 0.79 1.09 Chromis punctipinnis - 0.3 1.2 0.2 0.42 0.52 Rhacochilus vacca 1.3 - <0.1 0.35 0.65 Sebastes chrysomelas 0.2 0,2 0,4 0.4 0.33 0.10 Scorpaenichthys marmoratus - 0.3 0.7 0.2 0.29 0.28 Medialuna californiensis 0.8 - 0.2 - 0.25 0.35 Neoclinus stephensae 0.2 0.3 <0.1 0.2 0.23 0.10 Paralabrax clathratus Ouv.) 0.7 - 0.17 0.33 Rhinogobiops nicholsii Ouv.) <0.1 - 0.2 0.2 0.12 0.11 Embiotoca la/era/is 0.4 - 0.10 0.21 Rhacochi/us toxotes 0.4 - 0.10 0.21 Chromis punctipinnis Ouv.) 0.2 - - <0.1 0.08 0.12 Gibbonsia spp. Ouv) - - 0.3 0.08 0,17 Hypsurus caryi - - 0.3 - 0.08 0.17 Hermosilla azurea 0.2 - - - 0.06 0.12 Psychrolutidae Ouv.) - <0.1 <0.1 - 0.04 0.05 Artedius spp. - - <0.1 0.02 0.04 Ophiodon e/ongatus - - <0,1 0.02 0.04 Orthonopias triacis - - <0.1 0.02 0.04 Oxylebius pictus Ouv.} - - <0.1 0.02 0,04 Sebastes mystinus Ouv.) . <0.1 - 0.02 0.04 Sebastes serranoides <0.1 - - 0.02 0.04 Sebastes serranoides!S. ffavidus (vov) - <0,1 - - 0.02 0.04 t' ESLO2023-004 H-3

Appendix H - Subtidal Fishes Table H3. Subtidal fishes 2022 survey means (abundance per 50 x 4 x 2 m transect), standard deviations and annual means, South Diablo Cove Stations (SDC FO-1 (8), SDC FO-2 (9), SDC FO-3 (10)).

.. *.survey, 1p4 ,C',

Sl!ryey* I)iite. 1. 0~Mai:-72

• Ti!XQI( --~,-~,;{/' "-*~"'-*

• *Mean . .Mean /Mean:i Midwater larval/post-larval fish 46.0 27.4 3.3 19.19 21.65 Atherinopsidae 6.5 1.62 3.25 Chromis punctipinnis 1.6 0.3 0.48 0.75 Para/abrax c/athratus 0.5 0.2 0.8 0.2 0.44 0.30 Atherinops affinis

• 0.4 0.10 0.21 Medialuna californiensis 0.4 0.10 0.21 Benthic Oxy/ebius pictus 2.7 1.3 3.2 3.8 2.77 1.07 Rhinogobiops nicholsii 2.6 2.3 3.4 2.3 2.67 0.51 Chromis punctipinnis <0.1 1.8 7.6 2.38 3.57 Para/abrax clathratus 3.2 1.7 2.2 1.4 2.12 0.81 Neoclinus stephensae 0.8 0.7 1.2 1.3 1.02 0.32 larval/post-larval fish 2.9 0.73 1.46 Sebastes chrysomelas 0.7 1.0 0.42 0.50 Artedius spp. 0.3 0.6 0.5 0.35 0.26 Orthonopias triacis 0.2 0.7 0.23 0.31 Scorpaenichthys marmoratus 0.2 0.2 0.3 0.2 0.23 0.08 Oxyjulis californica 0.7 0.17 0.33 Oxyjulis ca/ifornica Uuv.) 0.7 0.17 0.33 Rhinogobiops nicholsii Uuv.) 0.5 0.12 0.25 Rhacochi/us vacca 0.2 <0.1 <0.1 0.08 0.07 Sebastes rastrelliger 0.3 0.08 0.17 Paralichthys californicus 0.2 0.06 0.12 Sebastes atrovirens 0.2 0.06 0.12 Artedius spp. Uuv.) 0.2 0.04

• 0.08 Citharichthys stigmaeus <0.1 <0.1 0.04 0.05 Gibbonsia spp. <0.1 <0.1 0.04 0.05 Ophiodon elongatus <0.1 <0.1 0.04 0.05 Oxylebius pie/us Uuv.) 0.2 0.04 0.08 Psychrolutidae Uuv.) 0.2 0.04 0.08 Urobatis halleri 0.2 0.04 0.08 Platyrhinoidis triseriata <0.1 0.02 0.04 Pleuronichthys coenosus (yoy) <0.1 0.02 0.04 Rhacochi/us toxotes <0.1 0.02 0.04 Sebastes miniatus Uuv) <0.1 0.02 0.04 Semicoss hus u/cher <0.1 0.02 0.04

~ ESLO2023-004 H-4

Appendix H - Subtidal Fishes Table H4. Subtidal fishes 2022 survey means (abundance per 50 x 4 x 2 m transect), standard deviations and annual means, Patton Cove-Stations (SC FO-1 (12), SC FO-2 (13), SC FO-3 (14)).

Survey 194 195, 196 197 Survey Date 18-Mar-22 12-Jul-~2 6-Sep-22 21-Oct-~2.

• Annual Annual Taxon Mean Mean Mean M~an Mea*n Std. Dev.

Midwater larval/post-larval fish - 2.2 2.9 - 1.27 1.50 Sebastes mystinus Uuv.) 0.2 1.3 0.6 0.2 0.60 0.51 Sebastes mystinus (yoy) <0.1 1.1 0.2 0.8 0.54 0.46 Sebastes mystinus 0.4 0.2 0.2 - 0.21 0.17 Sebastes serranoides 0.5 - 0.2 - 0.17 0.24 Embiotoca jacksoni <0.1 0.3 - - 0.10 0.16 Rhacochilus vacca <0.1 - - 0.2 0.06 0.08 Sebastes chrysome/as!S. carnatus (yoy) - 0.2 - - 0.06 0.12 Sebastes atrovirens - 0.2 - - 0.04 0.08 Sebastes chrysomelas!S. carnatus Uuv.) - 0.2 - - 0.04 0.08 Aulorhynchus f/avidus <0.1 - - - 0.02 0.04 Embiotoca lateralis - - <0.1 - 0.02 0.04 Rhacochi/us toxotes - - - <0.1 0.02 0.04 Benthic Oxylebius pie/us 3.8' 7.3 9.2 7.1 6.83 2.26 Sebastes mystinus Uuv.) 4.4 1.8 3.4 2.8 3.10 1.09 Sebastes mystinus (yoy) 2.3 3.5 3.0 2.3 2.79 0.57 Rhinogobiops nicho/sii 2.2 2.2 1.8 2.9 2.29 0.48 Sebastes chrysomelas 1.2 2.2 2.1 1.1 1.65 0.61 Embiotoca /atera!is 0.9 1.3 2.3 1.9 1.62 0.63 Embiotoca jacksoni 1.1 0.6 0.2 1.1 0.73 0.44 Sebastes serranoides!S. flavidus (yoy) - 2.0 0.3 - 0.58 0.96 Sebastes rastrelliger 0.7 0.6 <0.1 0.2 0.40 0.28 Artedius spp. 0.2 0.2 0.6 0.4 0.38 0.16 Gibbonsia spp. - 0.4 0.8 0.2 0.38 0.35 Rhacochi/us vacca 0.9 0.2 <0.1 0.3 0.38 0.38 Sebastes atrovirens (yoy) - 1.3 - - 0.33 0.67 Embiotoca /atera/is Uuv.) 0.5 - 0.5 0.2 0.29 0.25 Sebastes mystinus 0.9 - - <0.1 0.25 0.45 Semicossyphus pulcher <0.1 0.4 0.2 0.2 0.25 0.14 Sebastes serranoides 0.3 0.2 0.2 0.2 0.23 0.08 Oxyjulis californica 0.8 - - - 0.19 0.38 Ophiodon e/ongatus 0.3 - <0.1 0.2 0.17 0.15 Scorpaenichthys marmoratus - 0.3 - 0.2 0.15 0.17 Orthonopias triacis 0.2 0.2 <0.1 - 0.12 0.11 Sebastes atrovirens 0.2 0.2 - <0.1 0.12 0.11 Cebidichthys violaceus 0.2 - - 0.2 0.10 0.12 Hexagrammos decagrammus 0.2 <0.1 <0.1 <0.1 0.10 0.04 Sebastes serranoides Uuv.) - 0.2 <0.1 0.2 0.10 0.08 Sebastes chrysome/as!S. carnatus (yoy) - 0.3 - - 0.08 0.17 Rhacochi/us toxotes <0.1 - - 0.2 0.06 0.08 Rhinogobiops nicho/sii Uuv.) <0.1 - - 0.2 0.06 0.08 Sebastes melanops (yoy) - <0.1 0.2 - 0.06 0.08 Embiotoca jacksoni Uuv.) - <0.1 - <0.1 0.04 0.05 Sebastes miniatus - 0.2 - - 0.04 0.08 Aulorhynchus flavidus - - - <0.1 0.02 0.04 larval/post-larval fish <0.1 - - - 0.02 0.04 (table contmued) t' ESLO2023-004 H-5

Appendix H - Subtidal Fishes Table H4 (continued). Subtidal fishes 2022 survey means (abundance per 50 x 4 x 2 m transect), standard deviations and annual means, Patton Cove Stations (SC F0-1 (12), SC F0-2 (13), SC F0-3 (14)) .

. . 194>?,,; *- 196 ,"

18-IVlar-22 ., P7s1m~~2.

.~Annual '.

'}' Ml'l~1{'.* sfa. bevf.t Benthic (continued)

Oxylebius pictus Quv.) <0.1 0.02 0.04 Sebastes chrysome/as Ouv.) <0.1 0.02 0.04 Sebastes melanops <0.1 0.02 0.04 0 lebius ictus *uv. <0.1 0.02 0.04 ft' ESLO2023-004 H-6