DCL-2005-507, Transmittal of Annual Report for 2004 on Discharge Monitoring at Diablo Canyon Power Plant

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Transmittal of Annual Report for 2004 on Discharge Monitoring at Diablo Canyon Power Plant
ML050630236
Person / Time
Site: Diablo Canyon  Pacific Gas & Electric icon.png
Issue date: 02/28/2005
From: Becker J
Pacific Gas & Electric Co
To:
Office of Nuclear Reactor Regulation, State of CA
References
DCL-2005-507 NPDES CA0003751
Download: ML050630236 (36)
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Text

_ R: Electdc Company PacificGas and James R. Becker Diablo Canyon Power Plant Vice President -Diablo Canyon PO. Box 56 Operations and Station Director Avila Beach, CA 93424 805.545.3462 Fax: 805.545.4234 Date: Irebruary 28, 2005 I CERTIFIED 7003-3110-0005-7002-8766 PG&E Letter DCL-2005-507 California Regional Water Quality Control Board Central Coast Region Attn: Monitoring and Reporting Review Section 895 Aerovista, Suite #101 San Luis Obispo, CA 93401-7906

Dear Mr. Briggs:

In accordance with Order 90-09, NPDES No. CA0003751, enclosed is the Annual Report for 2004 on Discharge Monitoring at Diablo Canyon Power Plant (Enclosure 1).

Facility Name: Diablo Canyon Power Plant Address: P.O. Box 56 Avila Beach, CA 93424 Contact Person: Bryan K. Cunningham Job

Title:

Supervisor, Environmental Operations Phone Number: 545-4439 WDRJNPDES Order Number: Order No. 90-09, NPDES No. CA0003751 Type of Report: (check one) QUARTERLY ANNUAL 0 El st nd 3 rd 4 th Quarter: (check one): 1 2 0 01 0 0 Year: 2004 (Annual Reports for DCPP are Jan-Dec)

Violation(s) (Place an X by the appropriate choice):

  • o No (there are no violations to 0 Yes report)
  • Please see "Review of Compliance Record and Corrective Actions" section j$fimaS

PG&E Letter DCL-2005-507 Mr. Briggs February 28, 2005 Page 2 If Yes is marked (complete a-g):

a) Parameter(s) in Violation:

b) Section(s) of WDR/NPDES Violated: I c) Reported Value(s) d) WDRINPDES LimitlCondition:

e) Dates of Violation(s)

(reference page of report/data sheet):

f) Explanation of Cause(s): (If "YES", see overview section of attached report)

(attach additional information as needed) g) Corrective Action(s): (If 'YES", see overview section of attached report)

(attach additional information as needed)

PG&E Letter DCL-2005-507 Mr. Briggs February 28, 2005 Page 3 I certify under penalty of law that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to assure that qualified personnel properly gather and evaluate the information submitted. Based on my inquiry of the person or persons who manage the system, or those persons directly responsible for gathering the information, the information submitted is, to the best of my knowledge and belief, true, accurate, and complete. The results of the influent and effluent monitoring presented are the observed results of the measurements and analyses required by the monitoring program, and is neither an assertion of the adequacy of any instrument reading or analytical result, nor an endorsement of the appropriateness of any analytical or measurement procedure. I am aware that there are significant penalties for submitting false information, including the possibility of fine and imprisonment for knowing violations.

If you have any questions, please contact Bryan Cunningham at (805) 545-4439.

Sincerely, Name: James R. Becker

Title:

Vice President - Diablo Canyon Operations and Station Director 2005507/JLK/kmo

PG&E Letter DCL-2005-507 Mr. Briggs February 28, 2005 Page 4 cc: Michael Thomas, CCRWQCB 895 Aerovista, Suite 101 San Luis Obispo, CA 93401-7906 California Department of Fish and Game 20 Lower Ragsdale, Suite 100 Monterey, California 93490 Resident Inspector, David Prouix U.S. Nuclear Regulatory Commission Diablo Canyon Power Plant 104/5 Regional Administrator U.S. Nuclear Regulatory Commission Region IV 611 Ryan Plaza Dr., Suite 400 Arlington, TX 76011-8064 Director, Division of Reactor Projects U. S. Nuclear Regulatory Commission Region IV 611 Ryan Plaza Dr., Suite 400 Arlington, TX 76011-8064 Document Control Desk U. S. Nuclear Regulatory Commission Washington, D.C. 20555 Enclosure

ENCLOSURE ANNUAL

SUMMARY

REPORT ON DISCHARGE MONITORING AT THE DIABLO CANYON POWER PLANT (NPDES NO. CA0003751) 2004

PG&E Letter No. DCL-2005-507 2004 Annual Summary Report on Discharge Monitoring at the Diablo Canyon Power Plant TABLE OF CONTENTS PAGE OVERVIEW 1

SUMMARY

OF MONITORING PROGRAM I A. Monitoring of Plant Influent and Effluent 1

1. Monitoring Data I
2. Facility Operating and Maintenance Manual 1
3. Laboratories Used to Monitor Compliance 1
4. Review of Compliance Record and Corrective Actions 2 B. Monitoring of Receiving Water 5
1. Ecological Studies at Diablo Canyon 5
2. In-Situ Bioassay 5 C. Acti-Brom Treatment Program 5 APPENDICES Appendix I- NPDES Discharge Points Appendix 2- Tabular Summaries of Influent and Effluent Monitoring Appendix 3- Graphical Summaries of Influent and Effluent Monitoring Appendix 4- Summary of RWMP Monitoring for 2004 ENCLOSURE 2 - Errata Information

2004 Annual Summary Report on Discharge Monitoring at the Diablo Canyon Power Plant OVERVIEW A. This annual summary report follows the format used in quarterly monitoring reports. Analytical results below the respective Reporting Limit are plotted as a *zero' value in accordance with ELAP guidance. Less-than results are plotted conservatively at the value, except oil & grease, which is plotted as zeros for <3 values. During 2004, discharges occurred from all discharge paths except 0011, 001K, and 017.

B. California Ocean Plan Table B substances that were not analyzed for have not been added to the discharge stream. The substances listed in Table B in the 1990 Ocean Plan were each analyzed for and reported in the permit renewal application for Diablo Canyon Power Plant (DCPP) submitted in October 1994 and 2001. There have been no changes in the activities conducted at the plant that would have significantly affected the results previously reported in the above referenced documents.

SUMMARY

OF MONITORING PROGRAM A. Monitorinq of Plant Influent and Effluent

1. Monitoring Data
a. Appendix 1 provides a list of the discharge path names for ease of reference. Appendix 2 contains monitoring data in tabular form. Appendix 3 contains monitoring data in graphical form.
b. Annual oil and grease analyses were performed in October on Stormwater/Yard Drain Discharges 005, 008, 009, 013, and 015. All results were less than 3 mg/i. No discharges that resulted in adequate sample quantities occurred from 016 and no discharge occurred from 017 during 2004.
c. In November, Discharge 001 D (Liquid Radioactive Waste Treatment System) annual grab samples for lithium, boron, and hydrazine were collected and analyzed. The results were <0.050 mg/, 1210 mg/I, and 0.005 mg/I, respectively.
2. Facility Operating and Maintenance Manual Pacific Gas and Electric Company (PG&E) maintains a multiple volume Plant Manual (manual) at DCPP that contains procedures used for operation and maintenance activities at the plant, including those activities that relate to wastewater handling, treatment, sampling, analysis and discharge.

Plant procedures are prepared and reviewed by DCPP Staff and approved by DCPP Management.

DCPP conducts biennial internal audits that review NPDES Plant procedures contained in the manual. Ongoing reviews of Plant procedures are conducted to assure that the manual remains valid, current, and complete for the facility.

3. Laboratories Used to Monitor Compliance The following laboratories were used during 2004 for monitoring compliance. They are certified under the appropriate agencies for the test/analyses they perform. As part of the on-going annual certification process, these laboratories take part in, and have passed, annual quality performance evaluation testing.
a. PG&E Chemistry Laboratory, DCPP, Avila Beach, California (Lab Certification # CA01036)
b. Aquatic Bioassay Consultants, Ventura, California (Lab Certification # CA01907)
c. FGL Environmental, Santa Paula, California (Lab Certification # CA00140)

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d. Creek Environmental, San Luis Obispo, California (Lab Certification # CA00975)
e. Columbia Analytical Services, Kelso, Washington (Lab Certification # WA00035)
4. Review of Compliance Record and Corrective Actions
a. Circulating Water Pump Chlorination/Acti-Brom Monitoring The 2004 quarterly NPDES reports discuss chlorination cycles when discharge monitoring was interrupted. These are listed below with a brief description of the cause and corrective action.

When these monitoring interruptions occurred, engineering evaluations (approved by the CCRWQCB January 13,1994; PG&E Letter No. DCL-94-002) were performed. Detailed descriptions of these evaluations are included in the quarterly reports. The evaluations concluded that discharge chlorine limits were not exceeded in 2004. Biofouling of Unit I conduits and the Unit 1 discharge monitor was worse during 2004 than previous years.

1 Chlorination Cycle Chlorine disch I Corrective Date Monitoring interruptions M l ppb value Cause I Action 02/02104 Unit I results not monitored at the 36 Sample pump Sample pump to discharge failed. replaced 02/03/04 02111104 Unit 1 discharge monitor results lost 47 Chart recorder Data logger to for an 8 hour9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> period & data logger procedure revised 02/12/04 problems to improve instructions 4122/04 Unmonitored Unit 2 injections. 39 Loss of power Power was to to discharge restored upon 4/23/04 monitors discovery during plant maintenance 07/03/04 Unit I Monitor sample flow was <10- 14 Ocean debris Flush sample through below the minimum clogging lines. Flow 07/06/04 sample lines returned to normal.

08/10104 Unit I Monitor sample flow was 10 Ocean debris Upper flow block to below the minimum clogging cleaned proper 08/11/104 sample system sample flow restored 08/18104 Unit I Monitor air mix supply stuck <10 Salt buildup on Check valve through shut small rubber cleaned. Air flow 08/19/04 check valve returned to normal.

10/01/04 Inaccurate Unit 1 discharge monitor 18 - 85 Recurring Sample line to readings clogging of replaced; 10/07/04 sample line frequency of and system 10113/04 maintenance & QC to . checks increased 12/1/04 1211/04 Unit I dechlorination system not <10 - 101 Clogged Programmed 10-to working property (Limit: 120 ppb) chemical minute injections 12/14/04 supply line; 12 times per day.

pump Effluent limit malfunction calculated to be 120 ppb.

12/23/04 Unit I discharge monitor values <10-25 Failed QC Engineering to suspect check due to evaluation of 12/30/04 fouled sample results since last block QC check 2

b. Drains of Closed Cooling Water Systems PG&E received concurrence from the CCRWQCB in response to a letter dated July 19, 1995 (PG&E Letter DCL-95-156), for the use of the biocides glutaraldehyde and isothiazoline to control microbiological growth and corrosion in DCPP's closed cooling water systems. Any drainage from these systems is discharged at a flow-rate such that the chronic toxicity level is below the "No Observable Effect Concentration' (NOEC) at NPDES Discharge 001. The volumes of cooling water drained in 2004 from the component cooling water (CCW), intake cooling water (ICW), and service cooling water (SCW) systems are presented below. The glutaraldehyde and isothiazoline concentrations presented in the table below are system concentrations, not concentrations discharged.

Volume Glutaraldehyde Isothiazoline Reason &

Date System (gal) mi (mgIl) Comment 01119/04 Unit 2 ICW 3603 0 2 Routine maintenance.

01/22/04 Unit 2 ICW 3603 0 2 Routine maintenance.

03108104 Unit 2 ICW 50 0 2 Routine maintenance.

03/11/04 Unit 2 SCW 30 0 0 Routine maintenance 03/17/04 Unit 2 ICW 50 0 2 Routine maintenance 03/19/04 Unit 2 ICW 3763 0 0 Routine maintenance 03/22104 Unit 1 SCW 150 0 0 Routine maintenance 04/21104 Unit 2 SCW 1400 <50 6.1 Routine maintenance 06/02/04 Unit 2 SCW 3318 117 8.1 Routine maintenance 07/15/04 Unit 1 SCW 3300 130 7.3 Routine maintenance.

08/01/04 Unit I CCW 2672 250 0.0 Routine maintenance.

08131/04 Unit 1 CCW 22650 219 0.0 Routine maintenance.

09/01/04 Unit 1 CCW 68850 219 0.0 Routine maintenance.

09/02/04 Unit 1 CCW 67700 219 0.0 Routine maintenance.

09/03/04 Unit I CCW 20800 219 0.0 Routine maintenance.

10/25/04 Unit 2 SCW 200 196 4.2 Routine maintenance 11/01/04 Unit 2 CCW 20 162 0.0 Routine maintenance 12/06/04 Unit 2 ICW 20 50 569 Routine maintenance.

c. March On March 13, 2004, RWQCB staff were notified by phone of a Daily Maximum 001J (Condensate Pumps Discharge Header Overboard) oil and grease sample exceedance.

During a three-hour startup test of plant steam supply to steam generator cleaning equipment, approximately 600 gallons of condensate was drained to 001J. An oil and grease sample result during startup was 32 ppm. All other NPDES permit parameters were well below limits. The test was completed prior to additional oil and grease sample collection. Further plant steam testing was not drained to a discharging NPDES flowpath until compliance with all NPDES permit parameters were confirmed.

d. April On April 27 & 28, 2004 two steam generator chemical cleaning rinse tanks were discharged.

These tanks had been recirculated for a period of time that should have provided representative samples of the tank contents. Pre-discharge characterization samples were collected. The April 21, 2004 analytical results of the pre-discharge samples were below the 1mg/l copper and iron discharge limits. Composite samples were collected during discharge of these two tanks.

The analysis results of these composite samples were below the 1ppm limit for copper, however, iron was above 1 ppm. The first tank was 4.5 ppm and the second tank was 3.9 ppm.

A formal cause analysis of this issue determined the pre-discharge samples analyzed on April 21, 2004 were not representative of the entire tank contents due to settled iron particulate 3

matter collected in the bottom of the tank, and inability of the recirculating system to mix the entire tank contents. No other chemical cleaning rinse tanks were discharged.

e. July The first of two liquid 001 D composite samples for the 3rd quarter of 2004 was prepared on July 1, 2004, and delivered to FGL Environmental on July 21, 2004 for required metals analysis.

Analysis for mercury in this sample was performed on July 30, 2004. The result was ND(0.0001) mg/L. When this result was reported, the contract lab identified that the sample had been correctly preserved, but that the 28-day maximum sample hold time had been exceeded. It is not believed that any measurable loss of analyte from the sample occurred during the excess hold time because the sample was acidified and correctly refrigerated. FGL Environmental has performed a cause evaluation to determine why the sample was not analyzed within the 28-day maximum hold time and will implement corrective actions. The second composite sample for 001 D yielded the same analytical result and was analyzed within the 28-day maximum sample hold time.

The quarterly ammonia sample for 001 D is normally collected and analyzed in July. Due to instrument problems, this sample was not collected and analyzed until September. The analysis results are included in the September data. The instrument problems have been resolved and the instrument is now fully operational.

f. December On December 2, 2004, a small amount of Unit 2 condensate was inadvertently allowed to flow to the clean side of the Unit 2 turbine building sump (Discharge 001 F). This flow was outside the monitored pathway, and continued at about 1 gallon per minute for up to 2 days. The release was stopped upon discovery. A sample of the water was analyzed and all parameters were found to be below NPDES limits (sample results below). The water and its constituents were consistent with DCPP's NPDES permit for discharge 001 F. Regional Board staff were notified on December 3, 2004 and it was requested that this information be included in the fourth quarter report.

l Hydrazine l Total Suspended Solids l Oil and Grease l 79 pgIL 1 mgIL <3 mg/Il B. Monitoring of Receiving Water

1. Ecological Studies at Diablo Canyon Marine ecological monitoring was continued during 2004 under the Receiving Water Monitoring Program (RWMP) as requested in a letter from the Central Coast Regional Water Quality Control Board (CCRWQCB) dated December 9,1998, and as detailed in a letter from PG&E dated January 8, 1999 (DCL-99-503). This program includes tasks from the Ecological Monitoring Program (EMP) with additional stations and increased sampling frequencies. This program replaces the EMP and the Thermal Effects Monitoring Program (TEMP). Several one-year-only tasks outlined in the above letters were completed in 1999 and were again not requested to be performed in 2004. Results of 2003 RWMP data were submitted to the CCRWQCB on April 30, 2004. A table in Appendix 4 summarizes requirements and completed tasks for 2004. The fourth survey of Fish Observations were not completed due to poor ocean conditions in from December 2004 through February 2005.
2. In Situ Bioassay Results of the Mussel Watch Program are reported to the CCRWQCB directly from the California Department of Fish and Game in their periodic report for this program.

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C. Acti-Brom Treatment Proqram For the first half of 2004, DCPP continued its integrated Acti-Brom and "foul release coating" strategy to control macrofouling in the Circulating Water System (CWS). Acti-Brom is a sodium bromide solution with an added biodispersant that is used, in combination with sodium hypochlorite, to control settlement and growth of biofouling organisms. One Unit 2 conduit was run with sodium bromide and sodium hypochlorite to test if it would be as effective as the Acti-Brom product. The treatment program consists of six 20-minute injections (at four hour intervals) of a 1:1 molar ratio blend of Acti-Brom (or sodium bromide) and sodium hypochlorite to DCPP's intake conduits. Each injection attempts to achieve a target concentration of 200 parts per billion (ppb) Total Residual Oxidant (TRO) at the inlet waterbox of the condenser. Discharge TRO, measured at the plant outfall, remained below NPDES limitations, and typically are between approximately 20 ppb to 60 ppb. In conjunction with the chemical treatment, untreated portions of the cooling water system were previously painted with a non-toxic "foul release coating" to help prevent attachment of fouling organisms.

The sodium bromide test ran through the end of June and indicated that sodium bromide together with sodium hypochlorite would be nearly as effective at controlling macrofouling as Acti-Brom and sodium hypochlorite. Starting in the middle of July 2004, Diablo Canyon Power Plant has discontinued the use of the proprietary chemical Acti-Brom and now uses generic sodium bromide to control the growth of macrofouling organisms in its main circulating water conduits.

Unit 1 conduits started 2004 with simultaneous sodium hypochlorite and Acti-Brom treatments six times daily. Acti-Brom injections were shut down on February 3, 2004 and sodium hypochlorite injections were shut down on March 19 for both Unit 1 conduits in preparation for the 1R12 refueling outage. Simultaneous injections of sodium hypochlorite and Acti-Brom were restarted for conduit 1-1 on May 15, 2004 and on June 8,2004 for conduit 1-2. Both Unit 1 conduits continued simultaneous injections six times daily of sodium hypochlorite and Acti-Brom until mid-July when Acti-Brom was replaced with sodium bromide. Simultaneous sodium bromide and sodium hypochlorite treatment of both Unit 1 conduits continued through the remainder of 2004. There were brief interruptons to treatment for Unit I conduits in mid-January, mid-June, August, September, October, November, and early December due to injection system programming errors, dechlorination issues, and maintenance activities.

Unit 2 started 2004 with conduit 2-1 receiving simultaneous injections of sodium hypochlorite and Acti-Brom six times daily, while conduit 2-2 continued the experiment to test the effectiveness of generic sodium bromide, receiving simultaneous injections of sodium hypochlorite and sodium bromide. Acti-Brom treatment for conduit 2-1 was terminated on June 17, 2004 in preparation for a conduit 2-1 cleaning starting on June 19. After the 3-day tunnel cleaning, conduit 2-1 received sodium hypochlorite injections to control microfouling in the condensers until the 2R12 refueling outage at the end of October. Conduit 2-2 was not cleaned, and continued to receive simultaneous injections of sodium hypochlorite and sodium bromide until 2R12. Simultaneous sodium bromide and sodium hypochlorite injections were restarted for both Unit 2 conduits after the 2R12 refueling outage in early December when the circulating water pumps were restarted. These simultaneous macrofouling injections six times a day continued through the remainder of 2004. There were brief interruptions in treatment of Unit 2 conduits in early March, July, August, September, and December due to dechlorination issues and maintenance activities.

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APPENDIX 1 DIABLO CANYON POWER PLANT NPDES DISCHARGE POINTS DISCHARGE NUMBER DESCRIPTION 001 Once-Though Cooling Water 001 A Firewater Systems 001 B Auxiliary Salt Water Cooling System 001 C Discharge Deleted 001 D Liquid Radioactive Waste Treatment System 001 E Service Cooling Water System 001 F Turbine Building Sump 001 G Make-Up Water System Waste Effluent 001 H Condensate Demineralizer Regenerant 001 I Seawater Evaporator Blowdown 001 J Condensate Pumps Discharge Header Overboard 001 K Condenser Tube Sheet Leak Detection Dump Tank Overboard 001 L Steam Generator Blowdown 001 M Wastewater Holding and Treatment System 001 N Sanitary Wastewater Treatment System 001 P Seawater Reverse Osmosis System Blowdown 002 Intake Structure Building Floor Drains 003 Intake Screen Wash 004 Bio Lab and Storm Water Runoff 005, 008, 009, 013, 014, 015 Yard Storm Drains 006, 007, 010, 011, 012 Storm Water Runoff 016 Bio Lab Seawater Supply Pump Valve Drain 017 Seawater Reverse Osmosis System

-_ Blowdown Drain

APPENDIX 2 TABULAR SUMMARIES OF INFLUENT AND EFFLUENT MONITORING

2004 Annual Summary Report on Discharge Monitoring at the Diablo Canyon Power Plant DISCHARGE 001 TEMPERATURE (DEG IF) FLOW (MGD)

INFLUENT EFFLUENT DELTA T Month hich low ave high low ave high ave high low avP JAN 55.7 52.9 54.6 75.1 72.3 73.9 19.6 19A 2486 1874 2434 FEB 54.7 522 53.3 73.8 60.6 71.9 19.6 18.6 2486 2486 2486 MAR 55.7 50.6 53.0 74.5 68.5 71.9 20.0 18.8 2486 1279 2115 APR 525 50.2 51.2 72.8 70.2 71.6 20.9 20.4 1279 1279 1279 MAY 52.4 50.8 51.2 72.8 66.5 69.1 21.7 17.9 2015 1279 1610 JUN 553 49.8 51.8 74.7 65.4 70.0 21.5 17.7 2486 1862 2183 JUL 57.5 52.1 54.3 77.5 63.5 72.9 20.0 18.6 2486 2174 2476 AUG 592 52A 55.3 78.9 72.0 75.0 20.2 19.7 2486 2122 2474 SEP 60.0 54.2 56.7 80.1 73.0 76.2 20.4 19.5 2486 2200 2476 OCT 61.4 532 58.0 81A 73.1 77A 20.5 19.4 2486 1239 2234 NOV 602 55.2 57.4 79.6 74.9 77.2 20.1 19.8 1239 1239 1239 DEC 58.0 54.8 56.8 77.5 68.1 73.8 20.2 17.0 2486 1239 2245 limit: 22 2760 The INFLUENT and EFFLUENT "high" and "low" values correspond to the highest and lowest daily average value for that month. The INFLUENT high and low does not necessarily correspond to the same day as the high and low for the EFFLUENT for that month. The "avg" for INFLUENT and EFFLUENT is the average for the entire month. The Monthly Delta T "high" is the highest Delta T for a day of the month based on daily average INFLUENT and EFFLUENT values. The "Avg" Is calculated from INF and EFF monthly avg values.

DISCHARGE 001 TOTAL RESIDUAL TOTAL CHLORINE CHLORINE (daily max. ugtl) USED (lbs/day)

Month high low avP hieh low avF JAN 56 25 39 590 418

  • 537 FEB 62 22 43 749 504 586 MAR 77 25 50 713 254 442 APR 48 <0 21 274 202 236 MAY 30 14 346 216 263 JUN 61 <7 20 526 300 393 JUL 56 <10 18 605 475 559 AUG 29 <7 11 893 418 616 SEP 32 <7 7 806 528 655 OCT 42 18 27 806 307 635 NOV 85 21 62 446 149 383 DEC 101 <7 45 634 211 531 Note that the residual chlorine limits in Permit CA0003751, Order 90-09 is a daily max of 200 ug/I and includes a time-based limit (per the Ocean Plan) which depends on the length of the respective chlorination cycle.

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2004 Annual Summary Report on Discharge Monitoring at the Diablo Canyon Power Plant DISCHARGE 001 METALS (monthly avg. ugQ)

CHROMIUM COPPER ?NICKEL *ZINC Month Influent Effluent Influent Effluent Influent Effluent Influent Effluent JAN ND(10) ND(10) ND(10) ND(10) ND(10) ND(10) ND(10) ND(10)

FEB ND(10) ND(10) ND(10) ND(10) ND(1O) ND(10) ND(10) ND(10)

MAR ND(1O) ND(10) ND(10) ND(1O) ND(10) ND(10) ND(10) ND(10)

APR ND(1O) ND(10) ND(10) ND(10) ND(10) ND(10) ND(10) ND(10)

MAY ND(1O) ND(10) ND(10) ND(I0) ND(10) h'D(10) ND(10) ND(10)

JUN ND(10) ND(10) ND(10) ND(1O) ND(1O) ND(10) ND(10) ND(1O)

JUL ND(10) ND(10) ND(10) ND(10) 11 13 14 ND(10)

AUG ND(10) ND(10) ND(10) ND(10) ND(10) 22 15 13 SEP ND(10) ND(10) ND(10) ND(10) ND(10) ND(10) ND(10) ND(10)

OCT ND(1O) ND(10) ND(10) ND(10) ND(10) ND(10) 11 ND(1O)

NOV ND(10) ND(IO) ND(10) ND(10) ND(10) ND(10) 13 ND(10)

DEC ND(1O) ND(10) ND(10) ND(10) ND(10) ND(10) 11 ND(10) 6-month median limit: 10 - 10 - 30 - 70

  • Note: Influent zinc has been historically higher than effluent concentrations.

DISCHARGE 001 VARIOUS ANNUAL ANALYSES (NgM) 6-Mo. Med.

Effluent Parameter Influent Effluent limit Arsenic 1.2 1.1 30 Cadmium 0.03 ND(0.03) 10 Cyanide ND(10) ND(10) 30 Lead 0.24 ND(0.03) 10 Mercury 0.0023 ND(0.0010) 0.2 Silver 0.03 ND(0.03) 2.9 Titanium - ND(10) none

  • Phenolic Cmpds ND( 1.86) ND(1 1.82) 150 (non-chlorinated)
    • Phenolic Cmpds ND(4A5) ND(4.40) 10 (chlorinated)
      • PCB's ND(1.59) ND (139) none
  • Reporting limits [ND(11.86) & ND(11.82)l shown are each the sum ofindividual Reporting Limits for 6 target compounds.
    • Reporting limits IND(4.45) & ND(4.40)1 shown are each the sum orindividual Reporting Limits for 5 target compounds.
  • "*Reporting limit [ND(1.59)] shown is the sum oa individual Reporting Limits for 7 target compounds.

DISCHARGE 001 AMMhONIA (as N) (ug/I)

Month Influent Effluent JAN ND(200) ND(200)

FEB MAR APR ND(200) ND(200)

MAY JUN JUL AUG SEP ND(200) ND(200)

OCT NOV ND(200) ND(200)

DEC 6-month median limit: 3060 Page2 of 6

2004 Annual Summary Report on Discharge Monitoring at the Diablo Canyon Power Plant MONTHLY pH (averages)

Discharge: 001 002 003 004 001P Month Influent Emuent JAN 8.0 8.0 8.0 8.0 8.0 8.0 FEB 7.9 8.0 7.9 7.9 7.9 7.7 MIAR 8.0 8.0 7.9 7.9 8.0 7.9 APR 7.9 7.9 7.9 7.8 7.9 7.6 MAY 7.8 7.8 8.0 8.0 7.9 7.7 JUN 7.8 7.8 7.9 7.8 7.9 7.6 JUL 7.9 7.9 7.9 8.0 8.0 7.8 AUG 7.8 7.8 7.8 7.8 7.8 7.6 SEP 7.9 7.9 7.9 7.9 7.9 7.6 OCT 8.0 8.0 7.9 7.9 7.8 7.6 NOV 8.0 8.0 7.9 8.0 8.1 7.8 DEC 7.9 7.9 7.9 8.0 8.0 7.8 DISCHARGE OIF SUSPENDED GREASE & OIL (mg/i) SOLIDS (mg/A)

Month bith ave hieh avt JAN <3 <3 ND(5) ND(5)

FEB 3 <3 12 <5 MAR 4 <3 ND(5) ND(5)

APR <3 <3 ND(5) ND(5)

MAY <3 <3 5 <5 JUN 3 3 7 7 JUL <3 <3 9 <5 AUG <3 <3 ND(5) ND(5)

SEP <3 <3 ND(5) ND(5)

OCT <3 <3 ND(5) ND(5)

NOV <3 <3 ND(5) ND(5)

DEC 3 <3 ND(5) ND(5) limit: 20 15 100 30 Note: "high" limits based upon Daily Maximum limits. "avg" limits based upon Monthly Average Limits.

DISCHARGE OOIN (Monthly Summary ofWeekly Data)

SUSPENDED SETTLEABLE GREASE & OIL (mg/I) SOLIDS (mg/I) SOLIDS (mlA)

Month hieh low VE hileh low ave hith low avjg JAN ND(5) ND(5) ND(5) 10 6 7 ND(0.1) ND(0.1) ND(0.1)

FEB ND(5) ND(5) ND(5) 25 11 16 ND(0.1) ND(0.1) ND(0.1)

MAR ND(5) ND(5) ND(5) 33 ND(5) 16 ND(0.1) ND(0.1) ND(0.1)

APR 13 ND(5) <5 20 12 17 ND(0.1) ND(0.1) ND(0.1)

MAY 6 ND(5) <5 40 ND(5) 20 ND(0.1) ND(0.1) ND(0.1)

JUN ND(5) ND(5) ND(5) 11 6 9 ND(0.1) ND(0.1) ND(0.1)

JUL ND(5) ND(5) ND(5) 15 6 10 ND(0.1) ND(0.1) ND(0.1)

AUG ND(5) ND(5) ND(5) 15 6 9 ND(0.1) ND(0.1) ND(0.1)

SEP 5 ND(5) <5 14 6 9 ND(0.1) ND(0.1) ND(0.1)

OCT ND(5) ND(5) ND(5) 23 11 15 ND(0.1) , ND(0.1) ND(0.1)

NOV ND(5) ND(5) ND(5) 36 10 19 ND(0.1) 'ND(0.1) ND(0.1)

DEC 10 ND(5) <5 14 7 10 ND(0.MO ND(0.1) ND(0.11 limit: 20 - 15 - - 60 3.0 1.0 Note: "high" limits based upon Daily Maximum limits. "avg" limits based upon Monthly Average limits.

Page 3 of 6

2004 Annual Summary Report on Discharge Monitoring at the Diablo Canyon Power Plant DISCHARGE OO1D, H, L, F, METALS (avg. ugll) 001D 00111 001L 001F Month AL Cd Cr Cu A! Cd Cr Cu AZ Cd Cr Cu Az Cd Cr Cu JAN ND(I) 0.4 4 10 ND(I) 1 9 36 ND(l) ND(O.2) 4 2 ND(I) 0.5 4 28 FEB MAR APR ND(I) 0.8 2 19 ND(I) 1.1 8 29 ND(I) ND(0.2) 1 200 ND(l) 0.8 3 53 MAY JUN JUL NDII) 0.4 2 28 NDl) 2.1 19 93 ND(I) ND(0.2) ND(I) 4 NDM1) 03 4 12 AUG SEP OCT ND(l) 0.8 2 32 ND(S) 2 S 50 ND(I) ND(0.2) ND(I) 4 ND(l) 0.6 11 10 NOV DEC limit: none Note: OOID, 00111 and 001 L analyses performed on quarterly composites. 001 F analyses performed quarterly on a composite of weekly samples.

DISCHARGE OOID, H, L, F, METALS (avg. ug/l) 001D 00111 001L 001F Month Hg Ni Pb Zn n 1g Ni Pb Zn lig Ni Pb Zn Jig Ni Pb Zn JAN ND(0.2) 5 2.7 1040 ND(0.2) 10 5.9 ND(10) ND(0.2) ND(4) 0.7 ND(10) ND(0.1) ND(2) 2.2 30 FEB MAR APR ND(0.1) IS 7.3 171 ND(0.1)

M 9 6.2 ND(10) ND(0.1) 67 1.0 40 Nl)(0.1) 14 5.8 30 MAY JUN JUL ND(0.1) 8 2.9 11t ND(o.1) 19 6.6 20 ND(0.1) ND(1) 0.5 ND(10) ND(0.1) 8 1.2 10 AUG SEP ocr ND(0.1) 21 5 271O ND(0.1) 15 4 50 ND(0.1) ND(I) 13 ND(10) ND(Q.I) 6 1.3 20 NOV DEC limit: none Note: OID,00111 and 001 analyses performed on quarterly composites,ezcept formecury (due to holding time).

001F analyses performed quarterly on a composite of weekly samples.

Page 4 of 6

2004 Annual Summary Report on Discharge Monitoring at the Diablo Canyon Power Plant MONTHLY TOTAL SUSPENDED SOLIDS Averages (mg/I)

Month 00lD* 00IG 00111 0011 001J 001K 001CL OIN! 001,P 002 003 JAN 14 ND(5) ND(5) ND(5) ND(5) 19 ND(5) ND(5) <5 FEB 22 ND(5) ND(5) ND(5) 20 ND(5) ND(5) ND(5)

MAR 15 ND(5) ND(5) <S ND(5) 8 ND(5) ND(5) 8 APR 21 ND(5) ND(5) <S ND(5) ND(5) ND(5) 10 MAY 13 ND(5) ND(5) ND(5) ND(5) ND(5) ND(5) ND(5)

JUIN 11 ND(5) ND(5) ND(S) ND(5) 7 <5 ND(5)

JUL 8 ND(5) ND(5) ND(5) ND(5) ND(5) ND(5) ND(5) 5 AUG 8 ND(5) ND(5) ND(5) <5 ND(5) ND(5) ND(5)

SEP S ND(5) ND(5) ND(5) ND(5) <5 8 Ocr 11 ND(5) ND(5) ND(5) ND(5) 6 ND(5) ND(5) ND(5)

NOV 10 ND(5) ND(5) ND(5) <5 ND(5)

DEC 6 ND(5) 9 ND(5) <5 6 10 ND(5) ND(5)

Limit: 30 30 30 30 30 30 30 30 30 30

  • Discharges from 001D are batched. Monthly averages are flow weighted.

Note: No discharges occurred from 0011 and 001K during 2004.

Blank spots for other discharge points Indicate that no discharge occurred during that particular month.

QUARTERLY GREASE & OIL Averages by Month (mg/1)

Month 001D* 001i 00111 0011 COIJ 001K 001L DOMN! 001P 002 0n0 nn0 JAN 3 .<3 <3 5 '3 <3 FEB <3 <3 MAR 9 <3 APR <3 <3 <3 4 <3 <3 <3 '3 MAY <3 JUN JUL 4 <3 <3 <3 <3 <3 <3 <3 <3 <3 AUG <3 <3 SEP <3 OCT < <3 <3 <3 <3 <3 <3 '3 <3 NOV <3 DEC Limit: 15 15 iS 15 15 15 15 15 15 15 15 15

  • Discharges from 001D are batched. Monthly averages are flow weighted.

Note: No discharges occurred from 0011 and 001K during 2004.

PageS of 6

2004 Annual Summary Report on Discharge Monitoring at the Diablo Canyon Power Plant QUARTERLY ACUTE AND CHRONIC TOXICITY TESTING (toxicity units, tu, and tu,)

ACUTE *CIIRONIC Test 6-Month Test Month Result Median Result JAN 0.00 0.00 1.0 FEB MAR APR 0.00 0.00 1.0 MAY JUN JUL 0.00 0.00 1.0 AUG SEP OCT 0.00 0.00 1.0 NOV DEC 6-month median limit: 0.26 5.1

  • It should be noted that thisparameter is monitored for the State Ocean Plan Instead of the NPDES permit A value of 1.0 indicates no chronic toxicity.

DISCHARGE 001N ANNUAL ANALYSES Sludge Parameter Result limit Percent Moisture 99% None Total Kjeldabl Nitrogen 560 mg/kg None Ammonia (N) 57 mgtkg None Nitrate (N) ND(I) mg/kg None Total Phosphorus 18 mg/kg None pI1 6.6 None Oil and Grease 62 mg/kg None Boron ND(3) mg/kg None Cadmium ND(03) mglkg lO X STLC*

Copper 3 mg/kg IOXSTLC Chromium ND(0.5) mg/kg IOXSTLC Lead ND(I) mg/kg 10 X STLC Nickel ND(0.5) mg/kg IOXSTLC Mercury ND(0.01) mg/kg lOX STLC Zinc 8 mg/kg IOXSTLC Volume 2.47 tons None Note: Annual samples were collected in October

  • STLC = Soluble Threshold Limit Concentration Page 6 of 6

APPENDIX 3 GRAPHICAL SUMMARIES OF INFLUENT AND EFFLUENT MONITORING

2004 Annual Summary Report on Discharge Monitoring at the Diablo Canyon Power Plant DISCHARGE 001 INFLUENT Tenperature(rig 90.0 T 80.0 +

70.0 4 60.0 U.

50.0 -rE ~ ~ ~ i i 40.0 30.0 -f 20.0 -I. _ Average 10.0 - aLA 0.0 JAN FEB MAR APR MAY JUN JUL AUG SEP OcT NOV DEC 2004 DISCHARGE 001 EFFLUENT Temperature rig 90.0 T 80.0 -

70.0 60.0 -

L1.

f 50.0 -

Ls 40.0 -

30.0 -i 20.0 -i I-4-.-AvmtcI I ^Ga e l 10.0 -

0.0 -

JAN FEB MlAR APR MlAY JUN JUL AUG SEP OCT NOV DEC 2004 PageI of 15

2004 Annual Summary Report on Discharge Monitoring at the Diablo Canyon Power Plant DISCHARGE 001 EFFLUENT flow (tIGD) 3000 2500 u 2000

° 1500

.2 1000 oz o 500 o I I I I I I I I I JAN FEB MAR APR MIAY JUN JUL AUG SEP OCT NOV DEC 2004 DISCHARGE 001 EFFLUENT Monthly Delta T(r.)

25 I -

20 _ _

15.

I.

Da, 0 10  !-

I~ UmitI 5 j. .ig A h I -- #-Averge 0

JAN FEB MAR APR MIAY JUN . JUL AUG SEP Ocr NOV DEC 2004 Page2 of 15

2004 Annual Summary Report on Discharge Monitoring at the Diablo Canyon Power Plant DISCHARGE 001 Total ChlorineResidual 120 100 -

80

. 60 40 0 20  !

oI I I i I JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC 2004 Note: Values plotted at zero were below the reporting limiL DISCHARGE 001 Total Chlorine Used 1000 ith 900 l Averavl 800 - -

.,700 600 400 o - -00 200--

100 JAN FEB MIAR APR MAY JUN JUL AUG SEP OCT NOV DEC 2004 Page3 of 15 I

2004 Annual Summary Report on Discharge Monitoring at the Diablo Canyon Power Plant'*

DISCHARGE 001 Copper (monthly average) 121 I0 i 8

t6 4 +

A linuest 2 +--EMeutt 0O A A I& A  % & p JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC 2004 Note: The analyte was not detected at or above the reporting limit for values plotted at zero.

The 6-month median limit Is plotted on this chart.

DISCHARGE 001 Nickel (monthly average) 0 A.

1 A g A Ii A, A, JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC 2004 Note: The analyte was not detected at or above the reporting limit for values plotted at zero.

The 6-month median limit (the most conservative value) is plotted on this chart.

The daily m.aximum for Nickel is 100 ug/.

Page 4 of 15

2004 Annual Summary Report on Discharge Monitoring at the Diablo Canyon Power Plant DISCHARGE 001 Zinc (monthly average) 801T 70 60 50 + A infenon

  • Emuent a 40 -

30 +

20 10 01 F A A M i I JAN FEB MIAR APR MvAY JUN JUL AUG SEP OCT NOV DEC 2004 Note: The analyte was not detected at or above the reporting limit for values plotted at zero.

The 6-month median limit is plotted on this chart.

DISCHARGE 001 Chromium (monthly average) 12 t0 I .a a MEa IN . ME -1111 I.I 8

4

_ a I lAuigni 2 . lnis

. . + m~emt 0 , A A A . ^A ^A ^

JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC 2004 Note: The analyte was not detected at or above the reporting limit for values plotted at zero.

The 6-month median limit is plotted on this chart.

Page S of 15

2004 Annual Summary Report on Discharge Monitoring at the Diablo Canyon Power Plant pH 8.2 8.1 8.01 7.8 77 -

7.6 - -

73-__

JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC 2004 Note: Several data points on this chart overlap.

Discharge 001 Ammonia (as N) 3500 -

T 3000 2500 5 2000 -6-Nonth Median Limit AInfluent 1500

-4Effluent 1000 500 i i lI Ii i k I JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC 2004 Note: The analyte was not detected at or above the reporting limit for values plotted at zero.

Influent and Effluent values overlap at four points on this plot.

Page6 of 15

2004 Annual Summary Report on Discharge Monitoring at the Diablo Canyon Power Plant DISCHARGE OOIF Oil & Grease 25.0 Alaximum mgi7 20.0 al 15.0 10.0 l Saple Result (Miaximu) 5.0 JAN FEB MAR APR MAY JUN JUL AUG SEP OCF NOV DEC 2004 Note: Values plotted at zero were below the reporting limit When sample values were above the detection limit, the maximum values are plotted (February, March, June and December).

DISCHARGE OO1F Suspended Solids 120 Maximum nT4 80 UDaily Maximum Limit 60 l MIbly Average ULmit l E 4SampIe Result (Maximum) 40 20 -

JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC 2004 Note: The analyte was not detected at or above the reporting limit for values plotted at zero. When sample values were above the detection limit, the maximum values are plotted (February, M~ay,June and July).

Page 7 of 15

2004 Annual Summary Report on Discharge Monitoring at the

-Diablo Canyon Power Plant DISCHARGE 001 N iAi oothly Avtru mmit Oil & Grease Alligb 25 T. A .,

20 250 0 15 S ae JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC 2004 Note: Values plotted at zero were below the reporting limit.

Low and average values overlap at eight points on this ploL DISCHARGE OOIN U Avmge 1J~pit SuspendedSolids I A vwme 701T 60 so

~40 E 30 2D0 10 0

JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC 2004 Note: Values plotted at zero were below the reporting limit.

DISCHARGE OOIN Settieable Solids 3 2 2.5 - - Daily Maximem Unit 2

I I O Waffly Averate loili nte t Ui S 0 0 0A0er 0.5 +

JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC 2004 Note: Values plotted at zero were below the reporting limit.

High, average, and low values overlap at twelve points on this plot.

Page8 of 15

2004 Annual Summary Report on Discharge Monitoring at the Diablo Canyon Power Plant DISCHARGE OO1D

-Quarterly Afeals 35 30 25 E Silver

  • Cadmium 20 13Chromium E Copper 15 10 5

0 JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC 2004 Note: The analyte was not detected at or above the reporting limit for values plotted at zero.

DISCHARGE OOID Quarterly Afetals 300 250

  • Nickel c 200
  • Lead

.S G37Zinc

  • E 150 [eircury ua 100 50 0

JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC 2004 Note: The analyte was not detected at or above the reporting limit for values plotted at zero.

Page9 of 15

2004 Annual Summary Report on Discharge Monitoring

  • atthe Diablo Canyon Power Plant DISCHARGE OOIF 60 - QuarterlyMetals 50 I 40
  • Silver

O Copper 20 -

10 -

vn i JAN

-l FEB I

MAR I'*I APR MAY JUN I

I1 JUL I

AUG I

SEP I

I OCT NOV I

DEC I

2004 Note: The analyte was not detected at or above the reporting limit for values plotted at zero.

DISCHARGE OO1F QuarterlyAMetals 140 -

120 -

100 -

80 - N Nireury

  • N~c icktkel 60 -

El Lead 40 - 12Zine 20 -

0- ._

I . .

I

._ 1. . Ai_- -!

1. .'.A. i §- i JAN FEB MlAR APR MAY JUN JUL AUG SEP OCT NOV DEC 2004 Note: The analyte was not detected at or above the reporting limit for values plotted at zero.

Page 10 of 15

2004 Annual Summary Report on Discharge Monitoring at the Diablo Canyon Power Plant DISCHARGE OOIH QuarterlyAetals 100 90 80 70 60 50

[ iliver~

40

JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC 2004 Note: The analyte was not detected at or above the reporting limit for values plotted at zero.

DISCHARGE 00111 Quarterly Metals 60 So -

40 -

hercur

'i 30 -

  • Nickel E Lead 11Zinc U

20 -

10 -

0-JAN FEB MAR

.h APR MAY JUN JUL AUG SEP I

OCT NOV DEC 2004 Note: The analyte W2s not detected at or above the reporting limit for values plotted at zero.

Page11 of 15

2004 Annual Summary Report on Discharge Monitoring at the Diablo Canyon Power Plant DISCHARGE 00L Quarterly Metals 250 ,-

200 -

150 -f NSilver 100 -I

  • Cadmium ElChromium 50 - 1 Copper 0 I I JAN FEB MIAR APR NIAY JUN JUL AUG SEP OCT NOV DEC 2004 Note: The analyte was not detected at or above the reporting limit for values plotted at zero.

DISCHARGE 0OiL Quarterly AMetals 80 70 60 50 E 40 i Nfercury

  • Nickel 30 E3 Lead 20 EZinc 10 0

JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC 2004 Note: The analyte was not detected at or above the reporting limit for values plotted at zero.

Page12 of 15

2004 Annual Summary Report on Discharge Monitoring at the Diablo Canyon Power Plant MONTHLY TOTAL SUSPENDED SOLIDS Average 25T 30 . E 25 - Mnentlyr rtne Umit E 250 .+"ID 50 5

JAN FEB MIAR APR MAY JUN JUL AUG SEP OCr NOV DEC 2004 Note: Points on chart may overlap. Values plotted at zero were below the reporting limit.

MONTHLY TOTAL SUSPENDED SOLIDS Average 3sT 30 . . . n 25 Mthly Averge U1it MU-20 4601L E 2j+-IL E 5 -A\ - 00b JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC 2004 Note: Points on chart may overlap. Values plotted at zero were below the reporting limit MONTHLY TOTAL SUSPENDED SOLIDS Average 35 T

30 ,

25 -l Monthiy Avmgeauit E~20 20

-.&-oor

_Pt-02 E 15- o oos i0 5

0 JAN FEB MAR APR MAY JUN JUL AUG SEP Ocr NOV DEC 2004 Note: Points on chart may overlap. Values plotted at zero were below the reporting limit Page13 of 15

2004 Annual Summary Report on Discharge Monitoring at the Diablo Canyon Power Plant QUARTERLY OIL & GREASE Average 16 T UU U U - -U U U U U-14 +

12 - Imolol 10 -

-=001112 E

8- Molnibl Avege -;mL 6-4-

2-0

@I IL_

JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC 2004 Note: Values plotted at zero were below the reporting limit.

QUARTERLY OIL & GREASE Avterage 16 14 12 Im00IL

_ OIL 10 C=OOIM

-*-Monthly Aveng Umit

-a8 6

4 2

0 JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC 2004 Note: Values plotted at zero were below the reporting limit.

QUARTERLY OIL & GREASE Average 16 T

  • - *- * - * - * *--- *
  • U 14+

inooir 12 -

_ 002 10 + =003 5a 8-.

  • 004 6- Aonthly Awrnge Umit 4-2-

0 - I I I I I I 1I - 1 JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC 2004 Note: Values plotted at zero were below the reporting limit.

Page 14 of 15

2004 Annual Summary Report on Discharge Monitoring at the Diablo Canyon Power Plant ACUTE AND CHRONIC TOXICITY 6 :OT 5.0*

CChronic Results 4.0 6-mo. Median Acute Limit 3 0A Acute Results 3.0 -UF-Chronic Limit 0 2.0 1..0 0.0 JAN FEB MAR APR MAY JUN JUL AUG SEP OCTF NOV DEC 2004 Page 15 of 15

APPENDIX 4

SUMMARY

OF RWMP MONITORING FOR 2004 RWMP 1st Survey 2nd Survey 3rd Survey 4th Survey Stations! Completion Completion Completion Completion Surveys Stations! Stations/ Stations/ Stations!

Study per Year Dates Dates Dates Dates Horizontal Band Transects 14/ 4x Mar 4 May 24 Aug 29 Dec 16 Vertical Band Transects 5 /4x Feb 20 Jun 5 Aug 3 Dec 15 Benthic Stations 8/ 4x Mar 23 May 28 Sep 10 Feb 4/05 Fish Observation Transects 12 / 4x Apr 20 Jul 2 Oct 7 ***

Bull Kelp Census *lx

/ 1x Oct Temperature Monitoring 24 /** Jan-Mar Apr-Jun Jul-Sep Oct-Dec

  • Diablo Cove census
    • Temperature measured throughout the year at 20 minute intervals (14 intertidal and 10 subtidal stations).

The fourth survey of Fish Observations were not completed due to poor ocean conditions in from December 2004 through February 2005.

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