ML20057B517

Forwards Notice of Preparation of Draft Environ Impact Rept for Rancho Seco Park Master Plan for Review & Comment

ML20057B517
Person / Time
Site:	Rancho Seco
Issue date:	09/15/1993
From:	Shetler J SACRAMENTO MUNICIPAL UTILITY DISTRICT
To:	Weiss S NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
DAGM-NUC-93-184, NUDOCS 9309220167
Download: ML20057B517 (60)

Text

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)SMUD SACRAMENTO MUNICIPAL UTILITY DISTRICT O 6201 S Street, P.o. Box 15830. Sacramento CA 958524830,(916) 452-3211 AN ELECTRIC SYSTEM SERVING THE HEART OF CAtlFORNIA DAGM/NUC 93-184 September 15,1993 U.S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, DC 20555 Docket No. 50-312 Rancho Seco Nuclear Generating Station License No. DPR-54 NOTICE OF PREPARATION OF A DRAFT ENVIRONMENTAL IMPACT REPORT FOR TIIE RANCIIO SECO PARK MASTER PLAN Attention: Seymour Weiss Attached is the Notice of Preparation of a Draft Environmental Impact Report regarding the Rancho Seco Park Master Plan. The master plan includes a public golfcourse, an equestrian center, wetlands preserve, nature center, hiking trails, and expansion of the existing recreational facilities.

We are submitting a copy of this Notice ofPreparation for your review and comment. Should you have any comments, please provide them to the District within 30 days of the date of this letter.

Members of your staff with questions requiring additional information or clarification may contact Ken Miller at (916)452-3211, extension 4513.

Sincerely,

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/; y c' 4,

' fames R. Sheller Deputy Assistant General Manager Nuclear cc:

B. Faulkenberry, NRC, Walnut Creek I

9309220167 930915'

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RANCHO SECO NUCLEAR GENERATING STITTON O 14440 Twin Cities Road. Herald, CA 95638 9799;(209) 333-2935 l.

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P NOTICE OF PREPARATION To:

Responsible Agencies Trustee Agencies Interested Parties

Subject:

Notice of Preparation of a Draft EnvironmentalImpact Report lead Agency:

Consulting Firm:

Sacramento Municipal Utility District Jones & Stokes Associates Rancho Seco Park 2600 V Street 14440 Twin Cities Road Suite 100 Herald, CA 95638-9799 Sacramento, CA 95818-1914

Contact:

Kenneth Miller

Contact:

Kim Smith 916/452-3211, Ext. 4513 916/737-3000, Ext. 3134 The Sacramento Municipal Utility District (SMUD) will be the lead agency and will prepare an er vironmental impact report (EIR) for the project identified below. SMUD staff needs to know the views of your agency as to the scope and content of the environmental information that is germane to your agency's statutory responsibilities in connection with the proposed project. Your agency may need to use the EIR prepared by our agency when considering permit (s) or other approval (s) for the project.

The project description and location and its potential environmental effects are contained in the attached materials. A copy of the initial study is also attached.

SMUD has scheduled a scoping meeting for Tuesday, September 28,1993, at 10:00 a.m. at SMUD Headquarters, located at 6201 "S" Street, Sacramento, CA,95817-1899.

Due to the time limits mandated by State law, your response must be sent at the earliest possible date but not farer than 30 days after receipt of this notice.

Please send your response to Kenneth Miller at the address shown above and provide a name for a contact person in your agency.

Project

Title:

Rancho Seco Park Master Plan Pmject Location: Rancho Seco Park, Herald, CA Project

Description:

Approval of the Rancho Seco Park Master Plan for the Rancho Seco Park, which is owned and operated by SMUD as a public park. The master plan includes a public golf course, equestrian center, wetlands preserve, nature center, hiking trails, and expansion of the existing recreational facilities.

Date: $shN k /994 Signature:

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SACRAMENTO MUNICIPAL UTILITY DISTRICT 14440 Twin Cities Road Herald, CA 95638-9799 INITIAL STUDY In accordance with the policies of the Sacramento Municipal Utility District (SMUD) regarding implementation of the California Environmental Quality Act (CEQA), this document constitutes the initial study for the proposed project. This initial study provides the basis for the determination that the project may have a significant effect on the environment. An environmental impact report (EIR) will be prepared that focuses on the areas of concern identified by this initial study.

PROJECT DESCRIPTION Pmject 14 cation Rancho Seco Park is located immediately south of Twin Cities Road (State Route 1(M) and 11 miles east of State Route 99 in a rural area of southeastern Sacramento County (Figure 1). The site is located in Township 6N, Range 8E, west of the Sierra Nevada mountain range (Figure 2). This location is approximately 10 miles west of the j

community ofIone,10 miles south of the community of Rancho Murieta,13 miles southeast of the community of Elk Grove,14 miles northeast of the City of Galt, and 25 miles southeast of the City of Sacramento. Boundaries of the Rancho Seco site extend eastward l

to within 3 miles of the Amador County line and southward to within 3 miles of the San Joaquin County line.

l Site Description SMUD owns and operates the 2,480-acre site that includes a shut-down nuclear power plant, a solar power generating facility, and an existing 433-acre Rancho Seco Park and Lake complex. The proposed project is the adoption of a park master plan for 1,600 acres of the Rancho Seco site.

The project site is located in an area of flat to rolling rangeland that has been used primarily for cattle grazing. The site is in a broad alluvial plain that slopes westward from 1

the Sierra Nevada mountains at an approximate rate of 30 feet per mile. Site elevation ranges from 150 feet to 280 feet above mean sea level. Streambeds for Hadselville Creek Sacramento Municipal Utility District initialStudy Rancho Seco Park Master Plan 1

September 9,1993

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(bounding the site to the north) and Dry Creek (to the south) have been eroded to an elevation approximately 100 feet below that of the west-sloping upland surface.

The project site is characterized by rolling hills of grassland with seasonal wetlands interspersed in low-lying areas. The center of the park site supports the 160-acre Rancho Seco Lake, which was constructed as an emergency cooling water storage for the downslope Rancho Seco nuclear power facility.

The park is open year round,7 days per week, from 7:00 a.m. until sundown. The lake is maintained at the same level year round, making it a popular fishing spot for catfish, blue gill, bass, crappie, and trout (seasonal). Electric motor boats and row boats are allowed on the lake and paddle boats are available for rental.

Undeveloped portions of the site support an extensive and relatively dense occurrence of vernal pools and swales interspersed with annual grasslands. Portions of the site are seasonally grazed by livestock, and several stock ponds have been created to provide water to livestock. Small irrigated pasture areas, some of which are fallow, are found in the -

southeastern quarter of the site.

The most common wildlife in the area, which are generally found near water, include skunks, brush rabbits, raccoons, several species of waterfowl (mallards, teals, and gadwalls),

and wading birds. Grassland birds, including sparrows, finches, blackbirds, meadowlarks, and raptors, have also been observed in the area.

A detailed description of the site's emironmental setting is contained in the following focused studies:

Special-status plant and wildlife species surveys and habitat assessments for the a

Rancho Seco project site. Prepared by Jones & Stokes Associates. August 4, 1993.

Preliminary delineation of waters of the United States, including wetlands, for the m

Rancho Seco Park Master Plan. Prepared by Jones & Stokes Associates. July 15, 1993.

These reports are available for review at the SMUD offices at the Rancho Seco site and are incorporated herein.

Background

Construction of the Rancho Seco nuclear power plant began in 1969, commercial operation began in April 1975, and the plant ceased operating in 1989. SMUD has adopted.

a decommissioning plan that anticipates termination of SMUD's Nuclear Regulatory Commission license by 2011 and restoration of the nuclear power plant site (SMUD 1991).

Sacramento Municipal U~ility District initial Study t

Rancho Seco Park Master Plan 4

September 9,1993

4 As part of the development agreement to construct and operate the power plant, SMUD contracted with the State of California to operate a portion of the site as a public park for 40 years. The focus of this initial study and future EIR is the park master plan for this 1,600 acres. Existing park facilities include group camping, recreational vehicle sites, group and family picnic areas, and the Rancho Seco Lake with fishing and swimming amenities (Figure 3).

In 1971, SMUD entered into the contract with the State of California that granted SMUD funding for the construction of the Rancho Seco dam and reservoir, recreational facilities, and water and sanitary facilities associated with the recreation plan. This contract requires SMUD to maintain these facilities in a manner that supports public recreational uses and fisheries. The reservoir may not be drawn down below an elevation of 237 feet without the prior written consent of the State. The contract remains in effect until December 31,2022.

In accordance with the State contract, SMUD entered into a contract with Sacramento County in 1971. Under terms of the County-SMUD contract, SMUD agreed to constru'et water, sanitary, and recreation facilities and to operate the reservoir in accordance with the State-SMUD contract. The County of Sacramento agreed to manage these facilities for the full term of the State-SMUD contract. As a result of a budget shortfall in 1992, Sacramento County discontinued management of the park facilities and SMUD assumed these responsibilities.

General Description of the Project The project is the adoption of a park master plan. Tentative plans include a public j

golf course, equestrian center, wetlands preserve, nature center, hiking trails, and expansion of the existing recreational facilities (fishing, boating, and picnicking) (Figure 4).

SMUD's goals for the project are as follows:

continue to provide public park uses in compliance with the development e

agreement with the State of California, expand existing public park uses to meet the identified needs of the public,

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identify and provide long-term protection for the identified waters of the United e

States and various special-status plant and animal species on the site, and develop recreational 2ses that are fiscally self-supporting at buildout.

a The purpose of the project is to develop an array of recreational facilities that meet the needs of the public, are fiscally self-supporting at buildout, and are sensitive to the environment. One of the reasons the project is needed is because there is insufficient Sacramento Municipal Utility District initial Study Rancho Seco Park Master Plan 5

September 9,1993

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revenue to cover ongoing operation and maintenance costs associated with the public park, which SMUD is contractually obligated to operate.

Existing Recreational Development Rancho Seco Park offers multiple-use facilities and activities: group camping,18 recreational vehicle sites for fully self-contained vehicles, two reservable picnic areas for groups of up to 250 people, and over 100 family picnic sites. The park includes a store /

snack bar (operated by a concessionaire), restrooms, and solar-heated shower facilities.

Two boat launches are located on the lake, one on the north side and one on the south. Six fishing piers are at various locations around the lake. All the fishing piers are fixed because the water level in the lake is maintained at the same level year round. A swimming area with a sandy beach is buoyed off from the rest of the lake on the east shore.

Lifeguards are provided by SMUD during summer.

The lake contains four types of fish: catfish, bluegill, bass, and trout (planted season-ally). The catfish, bluegill, and bass have been established in the lake for years and main-tain a steady population. Larger fish weigh up to 18 pounds for bass,4 pounds for bluegill, and 30 pounds for catfish.

Most lake facilities are located only on the south and east shores of the lake. The peak number of persons at the Rancho Seco Lake on a summer weekend is approximately 5,000.

1 Proposed Recreational Development SMUD is in the process of developing the park master plan. The conceptual plan includes a public golf course, equestrian center, wetlands preserve, nature center, hiking trails, multi-use open space / picnic area, and par course, in addition to other existing park uses. The feasibility and desirability of these uses are being evaluated by SMUD; the final uses may change.

Golf Course. SMUD's goal for the golf course is a public play course that will provide the community with a quality, new construction facility and provide revenue for SMUD to continue park operations and finance development of the park master plan. The course clubhouse will ' provide meeting facilities as well as tournament and banquet amenities. The golf course will be designed by Palmer Course Design Company, providing a signature Arnold Palmer Golf Course.

Preliminary design of the golf course required a biological assessment of the site and wetlands delineation. A description of each of these studies is included in the " Environ-mental Checklist".

Sacramento Municipal Utility District InitialStudy Rancho Seco Park Master Plan 7

September 9,1993

R, The golf course will include a clubhouse sited to enable views of the lake and the 18th green. The clubhouse will include offices, locker rooms, pro shop, snack bar, and

~ s restaurant. The interior seating is anticipated to accommodate 60 people in the main dining area and 40 people in the bar/ lounge.

He golf course maintenance facility willinclude a golf course superintendent's office, mechanic's office and parts room, chemicals room, fertilizer room, and irrigation room. A vehicle washing area complete with drainage designed to include a leach field to avoid possible contamination of the lake will also be provided at the maintenance site. Above-ground fuel tanks for gas and diesel, a refuse disposal area, and a lift and grease pit mechanics area will be arranged within the 0.5-acre asphalt area adjacent to the main-tenance building.

Comfort stations will be provided at two locations on the course. Each station will include restrooms that are proposed to operate with septic tanks and leach fields.

Timing for the construction of the golf course is critical since the grassing of the course must occur during the warm spring months. In addition, once the course is grassed, six warm months are required for the grass to grow in before opening for play. Construction of the golf course is anticipated to start in August 1994. Grading and shaping will be initiated at that time and will be followed by drainage and irrigation. Feature construction and finish grading are expected to start in November 1994 and continue through spring 1995.

Grassing of the course will take place at that time; the grow-in t... './ will continue through the course opening in September or October 1995.

Theme and Character. The golf course landscape theme and character will be one that is sensitive to the existing terrain and native plant life. The course will be integrated into the existing setting by playing over and through the rolling grasslands. A sharp contrast will be created between irrigated, turfed golf course tees, greens, and fairways and the existing naturalized grasslands. Groves of oaks trees will blend the golf course with the surrounding rolling grasslands. Mixed reintroduced groves of valley oak, black oak, blue oak, and interior live oak will extend from the grassland to the golf course, reinforcing fairway configuration, backdropping dog legs and greens, transitioning tees, and providing much needed summer shade.

Evergreen species of oaks, such as coast live oak and holly oak, and other species will be planted at the irrigated fringes of the golf course.

A gradual transition at the golf clubhouse to native, compatible ornan. ental trees will enhance the entry threshold, reinforce / frame the entry drive, frame the tarte-cochere, screen the parking lot, modulate the parking area, and provide user interest.

Palmer Course Design Company: Philosophy of Golf Course Des!gn and Rancho Seco Park. The goal of the Palmer Course Design Company is to create a golf course that can be played by all levels of golfers but is difficult enough to interest the better i

Sacramento Afunicipal Utility District initial Study Rancho Seco Park Master Plan 8

September 9,1993 j

players. In addition, the golf course architect plans to utilize the existing topography in the course design to the fullest extent possible.

The rolling topography of the site provides a natural setting in which to construct a golf course. The site will require approximately 100,000 cubic yards of grading, which is normally the major work item during construction of any golf course. The existing landscape j

features found at the park, such as vernal pools, rolling grasslands, ponds, and the lake will i

l provide aesthetic enhancements as well as playing hazards and challenges. The playable l

areas of the golf course will be of hybrid Bermuda grass transitioning in appearance from perfect maintenance in high-play areas to a more brownish / golden-brown look that will blend into the native bunchgrass.

1 Other Park Uses. In terms of size, the primary recreation uses will be the golf course and wetlands preserve areas. Other park uses that are being considered include camping, equestrian center, nature center, hiking trails, and a multi-use open space /picrac area.

These other park uses are being evaluated and will be described in the ElR.

I Required Permits and Agnements 1

SMUD has identified the need for the following permits and agreements:

j 1.

A grading permit will be requested from Sacramento County for the golf course, clubhouse, maintenance compound, and other uses.

2.

A Section 404 nationwide permit will be requested from the U.S. Army Corps of Engineers (Corps) to allow the filling of Corps-jurisdictional wetlands.

SMUD has completed a wetlands delineation that identified 41.08 acres of wetlands under the Corps jurisdiction, in addition to 158.40 acres of other j

waters of the United States. The Corps has verified the delineation and determined that a permit will be required prior to any filling of the waters.

The Corps has assigned identification number 199300366 to the project. Until the design of the project is complete, it is not possible to determine exactly how much fill may occur; however, SMUD intends to avoid and minimize impacts such that a nationwide, not individual, permit will apply to the l

project.

The Section 404 permit will include a Section 401 water quality certification.

Water quality certification (Section 401 of the Clean Water Act) or a waiver of the certification from the regional water quality control board (RWOCB) is required for all Section 404 permits.

1 3.

A streambed alteration agreement (Section 1601) will need to be obtained from the California Department of Fish and Game (DFG) for any work within the 100-year floodplain consisting of, but not limited to, diversion or Sacramento Municipal Utility District initial Study Rancho Seco Park Master Plan 9

September 9,1993

i obstruction of the natural flow or changes to the channel, bed, or bank of any river, stream, or lake.

4.

A national pollutant discharge elimination system (NPDES) construction permit will need to be obtained from the RWOCB.

5.

A Stetion 7 consultation with the U.S. Fish and Wildlife Service (USFWS) may be required if federally listed species or their critical habitat are potentially affected by the project. Based on the results of special-status surveys completed at the project site in 1993, four species proposed for federal listing (vernal pool fairy shrimp, California linderiella, vernal pool tadpole shrimp, and viscid orcutt grass) are on the site; however, impacts on these species have not been assessed at this time.

In addition to these permits, the following permits will eventually be required to construct the project:

1.

Building nermits will be required from Sacramento County to construct the clubhouse, maintenance building, comfort stations, and other structures.

Focus of the Environmental Impact Report SMUD will prepare a focused program-level EIR that addresses the impacts of adoption of the park master plan. Development of the park as allowed by the park master plan will be evaluated against the analysis in this EIR to determine whether an additional environmental document must be prepared.

The EIR will address the following issues:

geology and soils, a

a water resources, biological resources, a

a land use, and a cultural resources.

Cumulative impacts will be addressed only as they relate to water and biological resources.

Sacramento Municipal Utility District Initial Study Rancho Seco Park Master Plan 10 September 9,1993

ENVIRONMENTAL CHECKLIST The following is a discussion of potential environmental impacts associated with adoption of the park master plan. The questions below are answered as follows:

A "no" answer means it has been determined that there is no potential for the s

subject effect to occur as a result of the project.

A "maybe" answer means it has been determined that there may be some

=

potential for the subject effect to occur as a result of the project.

A "yes" answer means that implementation of the project will result in the

=

particular effect.

A discussion of determination and required mitigation measures is presented after each issue area. If there is no significant impact or the impact is reduced to a less-than-significant level because of implementing required mitigation measures, the issue is " focused out" from further analysis in the EIR. Note: the concept of " focusing" is specifically anticipated by the State CEQA Guidelines in Section 15063.

Xcs Masbe Ha i

1. Earth. Will the proposal result in:

a.

Unstable earth conditions or changes in geologic substructures?

_X_

b.

Disruptions, displacements, compaction, or overcovering of the soil?

_X.

c.

Change in topography or ground surface relief features?

_X_

d.

The destruction, covering, or modification of any unique geologic or physical features?

_X_

e.

Any increase in wind or water erosion of soils, either on or off the site?

.X.

f.

Changes in deposition or erosion of beach sands or changes in siltation, deposition, or erosion which may modify the channel of a river, stream, or lake?

_X.

g.

Exposure of people or property to geologic hazards such as earthquakes, landslides, mudslides, ground failure, or similar hazards?

_X_

Sacrarnento Municipal Utility District Initial Study Rancho Seco Park Master Plan 11 Septernber 9,1993

1 I

Environmental Setting The park site is located on two distinct landforms, the Laguna Formation and the Mehrten Formation. Most of the project site occurs on the Laguna Formation, but two

~

areas in the north-central and northwest project areas are on the Mehrten Formation.

Redding and Corning soil series are the two series associated with the Laguna -

Formation. Redding predominates on the lower slopes of the old terrace surrounding the tributary to Hadselville Creek that is now dammed to form the Rancho Seco Lake. Corning predominates on the high, broad portion of the old terrace which, where undisturbed, has the densest network of vernal pools and swales.

The Mehrten Formation also has a mound-intermound pattern but supports fewer, shallower vernal pools and swales (compared to the Laguna Formation). Two soil series are associated with the Mehrten Formation in the project area: Pentz soil series on the mounds and Hadselville soil series on the intermounds.

The topography of the site is relatively flat with little variation in surface elevation.

The elevation of the site ranges from approximately 150 feet above sea level near the entrance to the site from Twin Cities Road to 280 feet on the east side of the project.

Explanation of Checklist The proposed project will not result in any unstable earth conditions or create changes in the geologic substructure. The project also will not result in the exposure of people or property to geologic hazards.

The golf course development will result in earth movement and grading to contour fairways, driving range, water hazards, and drainage, which will alter the topography of the existing terrain. Preliminary calculations estimate that 100,000 cubic yards of soil will be moved for the course. Additional grading will be required for the nature center and other park uses.

During construction, there is the potential for erosion and dust generation. After completion of the golf course and construction, erosion and siltation is expected to decrease.

The golf course has been designed to avoid vernal pools and wetlands wherever possible. Preliminary analysis indicates that approximately 2-3 acres of waters of the United States, including wetlands, will be impacted by the current design.

Based on the information provided, it is hereby determined through this initial study that the issue of ' Geology and Soils" will require limited further analysis in the program-level EIR. The EIR will discuss site characteristics and topography, soil types and soil Sacramento Municipal Utility District initial Study Rancho Seco Park Master Plan 12 Septernber 9,1993

.4 characteristics, and any geotechnical information that may be available. The " Impacts" analysis will focus on increased soil erosion during construction.

Mitigation Measures The following mitigation measures will be considered in the EIR analysis:

1.

A Section 404 permit, including an agency-approved wetland mitigation plan, will be obtained from the Corps before issuance of a grading permit.

2.

A Section 1601 streambed alteration agreement will be obtained from DFG before issuance of a grading permit.

3.

An erosion and sediment control plan will be submitted to Sacramento County for review and approval before issuance of a grading permit.

4.

A soils and geotechnical investigation report prepared by a qualified engineer will be submitted to Sacramento County for review and approval before exten-sion of utilities and/or issuance of a building permit. The sailinvestigation should include recommendatices for site preparation and grading, foundation and soil engineering design, preliminary pavement det!gns, and septic tank / leach field designs.

Yrs Maibe En

~

2. Air Quality: Will the proposal result in:

a.

Substantial air emissions or deterioration of ambient air quality?

.X_

.X_

b.

The creation of objectionable odors?

c.

Alteration of air movement, moisture, or temperature, or any change in climate, either

_X.-

locally or regionally?

Environmental Setting Regional Topography and Climate. The project site is located in southeastern Sacramento County at the eastern edge of the Central Valley. The topography of the area consists of gently rolling hills. The climate of the area is characterized by hot, dry summers and cool, moist winters. Winds in the area tend to be fairly strong and predominate from the west through the Carquinez Strait from the Pacific Ocean.

i Sacramento Municipal Utility Distnct initialStudy Rancho Seco Park Master Plan 13 September 9,1993'

Federal and State of California Ambient Air Quality Standards. Both the State of California and the federal government have established ambient air quality standards for several different pollutants (Table 1). For some pollutants, separate standards have been set for different time periods. Most standards have been set to protect public health. For some pollutants, standards have been based on other values, such as protection of crops, protection of materials, or avoidance of nuisance conditions.

Ozone Standards. State and federal standards for ozone have been set for a 1-hour averaging time. The state 1-hour ozone standard is 0.09 pt.rts per million (ppm), not to be exceeded. The federal 1-hour ozone standard is 0.12 ppm, net to he exceeded more than three times in any 3-year period.

Ozone is a public health concern because it is a respiratory irritant that increases susceptibility to respiratory infections. Ozone can cause significant damage to leaf tissues of crops and natural vegetation and can damage many materials by acting as a chemical oxidizing agent.

Ozone is of concern primarily during summer, when high temperatures, the presence of sunlight, and an atmospheric inversion layer induce photochemical reactions. Photo-chemical reactions convert ozone precursor emissions (reactive organic gases [ROG] and nitrogen oxides [NOx]) into ozone.

Particulate Matter Standards.

State and federal standards for inhalable particulate matter have been set for two time periods: a 24-hour arerage and an annual geometric mean of the 24-hour values. Until recently, the federal and state particulate matter standards applied to a broad range of particle sizes. The high-volume samplers used at most monitoring stations were most effective in collecting particles smaller than 30 microns (one micron is about 0.00004 inch in diameter) (Powell 1980). Health concerns associated with suspended particles focus on those particles small enough to reach the lungs when inhaled.

Few particles larger than 10 microns in diameter reach the lungs.

Consequently, both the federal and state air quality standards for particulate matter have been revised to apply only to these small particles (generally designated as PM10).

The state PM10 standards are 50 micrograms per cubic meter (pg/m3) as a 24-hour average and 30 pg/m3 as an annual geometric mean. The federal PM10 standards are i

150 pg/m3 as a 24-hour average and 50 pg/m3 as an annual arithmetic mean.

Carbon Monoxide Standards. State and federal carbon monoxide (CO) standards have been set for both 1-hour and 8-hour averaging times. The state 1-hour CO standard is 20 ppm; the federal 1-hour standard is 35 ppm. Both state and federal standards are 9 ppm for the 8-hour averaging period. State CO standards are phrased as values not to be exceeded. Federal CO standards are phrased as values not to be exceeded more than once per year.

CO is a public health concern because it combines readily with hemoglobin, which reduces the amount of oxygen transported in the bloodstream. CO binds to hemoglobin Sacrarnento Municipal Utility District initial Study Rancho Seco Park Master Plan 14 September 9,1993

Ttble 1. Ambient Air Quality Standards Applic:ble in California

Standard, Standard, as as micrograms parts per million per cubic meter Violation Criteria Pollutant Symbol Averaging Time California National California National California National Ozone 0,

I hour 0.09 0.12 180 235 If exceeded If exceeded on more than 3 days in 3 years Carbon monoxide CO 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> 9.0 9

10,000 10,000 If exceeded If exceeded on more than 1 day per par 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> 20 35 23,000 40,000 (Lake Tahoe only) 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> 6

7,000 Nitrogen dioxide NO, Annual average 0.053 100 If exceeded 470 If exceeded 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> 0.25 Sulfur dioxide 50, Annual average 0.03 80 If exceeded 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> 0.04 0.14 105 365 If exceeded if exceeded on more than 1 day per year ta 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> 0.25 655 Ilydrogen sulfide IIA 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> 0.03 42 If equaled or exceeded Vinyl chloride C,H Cl 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> 0.010 26 If equaled 3

or exceeded Inhalable particulate PM10 Annual geometrie mean 30 If exceeded matter Annual arithmetic mean 50 If exceeded 50 150 If exceeded on more 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> than 1 day per year Sulfate particles SO, 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> 25 If equaled or exceeded Lead particles Pb Calendar quarter 1.5 If exceeded on more than 1 day per year If equaled 1.5 30 days or exceeded Notes: All standards are based on measurements at 25* C and 1 atmosphere pressure.

National standards shown are the primary (health effects) standards.

200-250 times more strongly than does oxygen. Thus, relatively low concentrations of CO can significantly affect the amount of oxygen in the bloodstream. Both the cardiovascular system and the central nervous system can be affected when 2.5-4.0% of the hemoglobin in the bloodstream is bound to CO rather than to oxygen. State and federal ambient air quality standards have been set at levels to keep CO from combining with more than 1.5%

of the blood's hemoglobin (U.S. Environmental Protection Agency 1979, California Air Resources Board 1982).

CO is of concern primarily during winter, when vehicle-related emissions are greatest and atmospheric stability allows the buildup of high concentrations.

Existing Air Quality Conditions. The California Air Resources Board (CARB) publishes summaries of air quality monitoring data from locations throughout the state.

Following is a summary of monitoring data from locations in Sacramento County.

Ozone. Table 2 shows a summary of ozone air quality monitoring data from severallocations in Sacramento County. Many locations frequently exceed the state 1-hour standard of 0.09 ppm. The highest levels and most exceedances over the last 5 years have occurred at the Folsom and Citrus Heights stations. Locations that are not downwind of the Sacramento metropolitan area (downwind during the ozone season is generally east and northeast) should have ozone levels somewhat lower than most of the monitoring locations.

P M 10. Table 3 shows a summary of PM10 air quality monitoring data from several locations in Sacramento County. Many of the locations exceed both the state geometric mean standard of 30 pg/m3 and the state 24-hour standard of 50 pg/m3.

Sacramento County is classified as nonattainment for PM10 by the CARB.

Carbon Monoxide. Table 4 shows a summary of CO air quality monitaring data from several locations in Sacramento County. These data show that CO levels exceed standards primarily in the urban Sacramento area. Data from most of the Sacramento County stations show only a few exceedances of the state 8-hour standard.

Air Quality Management Programs. Air pollution control programs were established in California before the enactment of federal requirements. Federal Clean Air Act legislation in the 1970s resulted in a gradual merger of local and federal air quality programs, particularly industrial source air quality permit programs. Air quality manage-ment planning programs developed during the past decade have generally been in response to requirements established by the federal Clean Air Act. Enactment of the California Clean Air Act in 1988, amendments to it in 1992, and passage of the federal Clean Air Act Amendments of 1990 have produced additional changes in the structure and administration of air quality management programs.

The California Clean Air Act requires preparation of an air quality attainment plan for areas that violate state air quality standards for CO, sulfur dioxide, nitrogen dioxide, or ozone. No locally prepared attainment plans are required for areas that violate the state PM10 standards. PM10 attainment issues are being addressed by the CARB.

i F

Sacramento Municipal Utility District InitialStudy Rancho Seco Park Master Plan 16 September 9,1993

Table 2. Summary of Ozone Air Quality Monitoring Data for Sacramento County: 1988-1992 Ozone Levels (ppm)

Monitoring Station Parameter 1988 1989 1990 1991 1992 North liighlands Peak hour value' O.15 ND 0.12 0.13 0.1'l Days ateve standar(

34 10 9

3 Meadowview Road Peak-hout value' O.13 0.13 0.14 0.12 0.11 Days above standard" 15 26 17 11 4

Folsom Peak-hour value' O.17 0.17 0.11 0.19 0.15 Days above standar#

61 48 3

52 4.!

Citrus IIcights-Peak-hour value' O.17 0.12 0.15 0.15 0.:3 -

Sunrise Boulevard Days above standar#

51 12 21 23 21 Del Paso Manor Peak-hour value' O.13 0.12 0.15 0.18 0 13 Days above standard" 63 10 21 27 Note: ND = no data.

Peak hour values given as ppm.

Days with a peak 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> value exceeding the state standard of 0.09 ppm.

Source: California Air Resources Board 1993.

4 17

Table 3. Summary of PM10 Air Quality Monitoring Data for Sacramento County: 1988-1992 PM10 (pg/m')

Monitoring Station Parameter 1988 1989 1990 1991 1992 Citrus Heights-Sunrise Annual geometric mean 43.0 42.6 36.0 34.1 29 3 24-hour - 2nd highest 78.0 118.0 116.0 88.0 82.0 Sacramento. Del Paso Annual geometric mean 33.0 403 28.6 31.9 24.4 24-hour - 2nd highest 78.0 1M.0 135.0 75.0 67.0 Sacramento Health Annual geometric mean 35.5 47.0 ND 29.1

' 26.9 Department -

24-hour - 2nd highest 102.0 155.0 ND

%.0 70.0 Stockton Boulevard Note: ND = no data.

Source: California Air Resources Board 1993.

t u

e 18

A Table 4. Summary of Carbon Monoxide Air Quality Monitoring Data for Sacramento County (ppm): 1988-1992 Monitoring Station Parameter 1988 1989 1990 1991 1992 Citrus licights-Sunrise Peak 1-hour value 10 9

10 8

9 Peak 8-hour value 7.5 6.9 6.5 5.9 5.1 Days above standard 0

0 0

0 0

North flighlands Peak 1-bour value 12 ND 8

9 7

Peak 8-hour value 11.4 ND 53 53 3.9 Days above standard 3

ND 0

0 0

Sacramento-Del Paso Peak 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> value 12 15 12 11 9

Peak 8-hour value 9.7 13.0 11 3 8.0 73 Days above standard 1

13 4

0 0

Sacramento-El Camino Peak 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> value 15 18 15 15 11 Peak 8-hour value 11.6 15.9 14.0 12 3 8.6 Days above standard 7

17 13 6

0 Sacramento-T Street Peak 1-hour value ND 14 16 12 12 Peak 8-hour value ND 113 11.4 9.6 6.5 Days above standard ND 7

4 2

0 Notes: ND = no data.

Peak 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> and peak 8-hour values given as ppm.

Days above standard is days with a peak 8. hour average value execeding the federal primary and state CO standards of 9 ppm.

Sourec: California Air Resources Board 1993.

19

4 The Sacramento' Metropolitan Air Quality Management District (SMAOMD) published its air quality attainment plan in July 1991, which was found to be consistent with the Clean Air Act. The plan does not address golf course or park land uses, however, and therefore does not pertain to the project.

It is important to note that the air quality attainment plan requirements established by the California Clean Air Act are based on the severity of air pollution problems caused by locally generated emissions. Upwind air pollution control districts are required to establish and implement emission control programs commensurate with the extent of pollutant transport to downwind districts. The broader Sacramento area has been identified as a source of pollution transport to the upper Sacramento Valley and the San Joaquin Valley and a receptor of pollutant transport from the San Francisco Bay Area.

Explanation of Checklist The air quality analysis focuses on construction impacts and ozone precursor impacts.

CO is not expected to be a problem because high CO levels are primarily found during winter near congested intersections. During winter, project traffic generation is expected to be much less than peak summer levels. Also, the roads and intersections in the project vicinity operate without congestion.

Criteria for Determining Significance. According to State CEOA Guidelines (Sec-tion 5064[e] and Appendix G), a project will normally have a significant impact if it would:

violate any ambient air quality standard; a

contribute substantially to an existing or projected air quality violation; a

expose sensitive receptors to substantial pollutant concentrations; e

i result in substantial air emissions or deterioration of air quality. Substantial a

emissions would be emissions above the thresholds of significance contained in the SMAOMD environmental review program.

Those thresholds equal 550 pounds per day of CO,150 pounds per day of ROG and NOx, and 80 pounds per day of PM10; create objectionable odors; or a

alter air movement, moisture, or temperature, or result in any change in climate a

either locally or regionally.

Construction-Related Air Emissions. Construction of the proposed project would generate emissions of particulate matter (PM10) from site grading and earth-moving i

activities and emissions of total organic gases, CO, NOx, sulfur oxides, and PM10 from con-struction vehicle exhaust emissions.

Sacramento Municipal Utility District initial Study Rancho Seco Park Master Plan 20 Septernber 9,1993

1 Construction period emissions were calculated using U.S. Environmental Protection Agency (EPA) emission rate data and calculation procedures (U.S. Emironmental Protec-tion Agency 1985). Assumptions included emissions for three scrapers, one water truck, one loader, and five track-type tractors; each operating 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> per day; 10 acres being actively worked each day; and a 30% PM10 portion of total suspended particulates. In addition, the total daily emissions include a 50% reduction for dust control program effectiveness.

As shown in Table 5, construction period emissions are estimated to be 16 pounds per day (ppd) of total organic gases,68 ppd of CO,204 ppd of NOx,184 ppd of PM10, and 23 ppd of sulfur oxides. Because the level of NOx and PM10 emissions would be above the SMAQMD thresholds, this impact is considered significant.

Ozone Precursor Emissions. The park master plan would create emissions of the ozone precursor pollutants, ROG and NOx, from new vehicle trips generated by the golf course, campground, and park expansion. Also, a relatively minor amount of emissions would be produced by landscape maintenance, primarily lawn mowing, and miscellaneous activities associated with the master plan.

A summary of ozone precursor emissions is shown in Table 6. Emissions have been calculated for 1995 by multiply!ng vehicle miles traveled (VMT) for the peak day (Saturday) by the ROG and NOx emission rates. ROG and NOx emission rates are based on a temperature of 75 degrees Fahrenheit and a speed of 45 mph. The project is expected to produce 30 ppd of ROG and 70 ppd of NOx. Because these emissions would be below the SMAQMD thresholds, this impact is considered less than significant and no mitigation is required.

No objectionable odors are anticipated from the project.

Mitigation Measures SMUD will comply with the following mitigation measures; no further analysis in the program-level EIR is proposed.

1.

SMUD will prepare a dust control plan before groundbreaking occurs. This plan will ensure that adequate dust controls are implemented during project construction. The following measures will be included in the dust control plan:

a.

Water will be applied to exposed earth during clearing, grading, earth-moving, and other site preparation work. Depending on wind condi-tions and the amount of dust generated, water will be applied at least twice a day with complete coverage of surfaces, preferably in the late morning and at the end of the work day.

Sacramento Municipal Utility District initia! Study Rancho Seco Park Master Plan 21 September 9,1993

Table 5. Typical Construction Period Emissions during Major Site Disturbance Activities (pounds per day)

Emission Source TOG CO NOx PM10 sox Construction vehicle exhaust emissions 16 68 2(M 19 23 PM10 fraction of fugitive dust

_0

_Q

_0 ffd

_Q Total daily emissions 16 68 204 184 23 Notes: Emission rate data and procedures from U.S. Environmental Protection Agency 1985 (AP-42, Volumes I and II).

TOG = total organic gases.

NOx

= nitrogen oxides.

CO

= carbon monoxide.

PM10 = particulate matter 10 microns or less in diameter.

sox

= sulfur oxides.

i 22

k Table 6. Emissions of Ozone Precursors (pounds per day)

Saturday Vehicle Trip Miles Land Use Generation Traveled ROG NOx Park Master Plan 840 25,203 30 70 reactive organic gases.

Notes:

ROG

=

nitrogen oxides.

NOx

=

Park Master Plan includes an 18-hole golf course, campground, nature preserve, and park.

Trip generation rate obtained from Institute of Transportation Engineers 1991.

a i

i

i I

i b.

The only type of dust suppressant to be used will be water. Any change in dust suppressant will be reviewed and approved by a wetlands consultant to ensure that no impacts would result on wetlands or vernal pools.

c.

Mud and dirt clinging to truck wheels will be cleaned up on a daily basis such that no dirt is carried onto public streets, d.

All clearing, grading, earthmoving, and excavation activities will be minimized during periods of winds exceeding 30 mph velocity over I hour.

c.

During construction, onsite vehicle speed in the construction area will be limited to 15 mph.

f.

Dry weather wetting and/or paving (graveling) of heavily traveled roads will be performed as needed to reduce dust emissions throughout construction and the life of the project.

g.

The ground surface will be left undisturbed to the extent possible by minimizing the area to be graded and cleared.

h.

Bare earth surfaces will be treated to minimize dust; grassing of the golf course will occur as soon after grading as possible.

2.

Construction equipment engines will be tuned according to manufacturers' specifications and kept in proper working condition. Diesel-powered, low-sulfur fuel, or electric equipment (whichever is the lowest emitter) will be used, wherever possible and feasible, in lieu of gasoline-powered engines.

3.

Ridesharing and transit incentives for the construction crew will be supported and encouraged.

4.

Open burning of wood / vegetative waste materials from construction or operation of the project will be minimized. Open burning will be permitted only as part of the recreational activities.

5.

Only electric golf carts will be allowed on the golf course.

Sacramento Municipal Utility District Initial Study Rancho Seco Park Master Plan 24 September 9, M3

Xcs Ma\\be No

3. Water: Will the proposal result in.

a.

Changes in currents, or in the course or direction of water movements, either in marine or fresh waters?

1 b.

Changes in absorption rates, drainage patterns, or the rate and amount of surface runoff?

_X_

c.

Alterations to the course or flow of flood waters?

1 d.

Change in the amount of surface water m any 1

water body?

X_

e.

Discharge into surface waters, or in any altera-tion of surface water quality including, but not limited to, temperature, dissolved oxygen, or turbidity?

1 f.

Alteration of the direction or rate of flow of groundwater?

1 g.

Change in the quantity of groundwaters, either through direct additions or withdrawals or through interception of an aquifer by cuts or excavations?

1 h.

Substantial reduction in the amount of water otherwise available for public water supplies?

_X_

i.

Exposure of people or property to water-related

_X_

hazards such as flooding or tidal waves?

Environmental Setting Topography. The Rancho Seco site consists of gently rolling hills that are not intersected by any streams but are bounded by well-defined drainage courses that intercept surface runoff from the higher site topography. The plant grade levelis at approximately 165 feet elevation above sea level. This elevation permits excellent drainage at all times without danger of flooding.

Storm Runoff. The site is bounded on the north by Hadselville Creek, which inter-cepts all drainage from the site and empties into Laguna Creek to the west. Laguna Creek conveys this flow westerly to the Cosumnes River and then into the Mokelumne River. The Mokelumne River is a tributary of the southerly flowing Sacramento River and enters the Sacramento River approximately 20 miles south of the City of Sacramento.

Sacrarnento Municipal Utility District Initial Study Rancho Seco Park Master Plan 25 September 9,1993

Stormwater runoff at the site is controlled primarily by surface ditches. Generally, overland flows are intercepted by the ditches and diverted around the plant to natural stream channels. When this is not possible, runoff is diverted down cut slopes in culvert pipes and discharged to the plant drainage ditch system. The drainage system was designed to accommodate the 25-year recurrence storm with a minimum of 6 inches of freeboard and the 100-year recurrence storm with zero freeboard.

Historical Flooding. Within recent historical times, no flooding or inundation from storms or runoff has occurred within the site boundaries. It is unlikely that the site can be inundated or flooded, even with abnormal rainfall intensities. A hydrologic study of storms that could produce critical floods was conducted to provide the design criteria for construction of an adequate spillway to safeguard the dam embankment of the lake from any danger of overtopping.

Groundwater. Two wells exist on site. The well at the power plant is 600 feet deep with a 40-horsepower motor and pumps approximately 300 gallons per minute (gpm). The well at the park is 400 feet deep with a 40-horsepower motor and pumps approximately 250 gpm. The well water at the park is chlorinated and stored in a hydropneumatic tank.

The park well supplies water for two permanent residences, a snack bar, and irrigation for the park grass area.

SMUD also obtains water for the Rancho Seco Lake and power plant from the Folsom South Canal. The U.S. Bureau of Reclamation constructed the canal as part of the Central Valley Project. A 66-inch-diameter pipeline and pumping station convey water from the Folsom South Canal to the site. Upon entering the site, the pipeline splits; the 66-inch diameter pipeline supplies water to the power plant, and a 48-inch diameter pipeline supplies water to the lake. The water can be delivered to either or both simultaneously.

Rancho Seco I,ake. The Rancho Seco Lake is a man-made earthfill dam approxi-mately 60 feet high. The lake covers approximately 160 acres, retains 9,000 acre feet of water, and is used as a public recreational facility for fishing, swimming, and other water-related activities.

Folsom South Canal. SMUD has water rights for 15,000 acre feet of water from the Folsom South Canal. Water from the canal is pumped to the Rancho Seco site at a rate of 6,500 gpm or 28.7 acre feet per day (10,480 acre feet annually).

Explanation of Checklist The proposed project would result in grading for the golf course, club house, and maintenance facilities. This grading would alter the direction of water movement, absorp-tion rates, and drainage patterns. These issues will be addressed in the program-level ElR.

Sacramento Municipal Utility District Initial Study Rancho Seco Park Master Plan 26 September 9,1993

f l

The golf course is proposing to expand an existing stock pond to use as a reservoir for golf course irrigation water. Alteration of the stock pond will change the amount of surface water in the stock pond.

The project is proposing to collect sewage from the golf course and park facilities and pipe it to the existing sewage treatment system. The existing oxidation / evaporation pond will be expanded and followed by filtration to meet State of California Title 22 wastewater reclamation requirements. The effluent will be pumped to the golf course lake for storage and used as golf course irrigation water. Wastewater from the proposed maintenance building and two golf course comfort stations is proposed to be treated and disposed of with individual septic tank leach field systems.

The project is proposing four sources of water for irrigation of the golf course: surface drainage, treated wastewater effluent, existing wells, and water from the Folsom South Canal. Preliminary evaluation indicates the primary sources of water will be surface runoff and treated wastewater effluent stored in the golf course lake. The secondary source of water will be the existing park well. The power plant well and Folsom South Canal water from the Rancho Seco Lake will be available for emergency use only.

The golf course lake will be capable of receiving water from the following sources:

treated wastewater from both the power plant and park wastewater treatment m

plants, runoff collected from the golf course and surrounding area, a

runoff collected from the Clay Creek drainage basin that is stored in the Rancho a

Seco Lake, well water from the park well, i

a well water from the power plant well, and e

s water diverted from the Folsom South Canal.

l Preliminary estimates are that the golf course will require approximately 500,000 gallons of irrigation water per day during the irrigation season, which is from mid-March to mid-October. The total annual required irrigation water will be approximately 105 million gallons, or 320 acre feet.

Preliminary calculations of annual flows generated by each source to be stored in the golf course reservoir are:

I a treated wastewater 5.5 acre feet golf course drainage -

70.0 acre feet a

Clay Creek drainage - 1,500.0 acre feet e

Sacrwnento Municipal Utility District Initial Study Rancho Seco Park Master Plan 27 September 9,1993

403.0 acre feet park well a

483.0 acre feet power plant well a

It is not anticipated that water from the Folsom South Canal will be required for golf course irrigation.

The project is proposing to install state-of-the-art golf course grasses, plantings, and irrigation. A computerized irrigation system will provide water at the best time to minimize evaporation. In addition, soil moisture sensors will be used to eliminate the possibility of overwatering. The sprinkler system will be site-specific in design, reducing overspray and spray subject to evaporation.

Based on the information provided,it is hereby determined through this initial study that the issue of" Water Resources" will require limited further analysis in the program-level EIR. The EIR will discuss regional and local hydrology, vernal pool and groundwater hydrology, and surface water and groundwater quality. The " Impacts" section will include an analysis of impacts on the local and regional hydrology and vernal pool hydrology and impacts related to the proposed wastewater reclamation plan. This section will also discuss proposed water facilities and supplies versus project demand.

Yrs Masbe No i

4. Plant and Animal Life. Will the proposal result in:

a.

Change in the diversity of species, or number of any species of plants (including trees, shrubs, grasses, crops, and aquatic plants) or animals (birds, land animals, including organisms, or insects)?

1 b.

Reduction of the numbers of any unique, rare, or endangered species of plants or animals?

1 i

c.

Introduction of new species of plants into an area, or in a barrier to the normal replenishment of existing species, or in a barrier to the migration or movement of animals?

1 d.

Reduction in acreage of any agricultural crop?

1 i

e.

Deterioration to existing fish or wildlife habitat?

1 Emironmental Setting l

The following discussion summarizes information in the Preliminary Delineation of l

Waters of the United States, Including Wetlands, for the Rancho Seco Park Master Plan (Jones & Stokes Associates 1993a) and the Special-Status Plant and Wildlife Species Smveys Sacramento Municipal Utility Distn'ct Initial Study Rancho Seco Park Master Plan 28 September 9,1993

and Habitat Assessments for the Rancho Seco Project Site (Jones & Stokes Associates 1993b).

Habitat Types. The project site is characterized by rolling hills of grassland with seasonal wetlands interspersed in low-lying areas. Undeveloped portions of the site support an extensive and relatively dense occurrence of vernal pools and swales interspersed with annual grasslands. Portions of the site are seasonally grazed by livestock, and several stock ponds have been created to provide water to livestock. Larger stock ponds support riparian woodland vegetation. Small irrigated pasture areas, some of which are fallow, are found in the southeastern quarter of the site.

The project site supports 12 habitat types: annual grassland, vernal pool, vernal swale, seasonal wetland, seep, emergent marsh, juncus meadow, willow riparian, ephemeral drainage, open water, irrigated pasture, and ornamental. Each habitat and its associated vegetation and wildlife is briefly described below.

Annual Grassland. Annual grasslands dominate the project area and are dry through summer. This seasonally dry habitat is characterized by a dominance of naturalized non-native g asses that cover the hultops and well-drained uplands and surrounding areas.

Annual grasslands have a dominace of wild oat, ripgut brome, soft chess, small fescue, and medusa-head grass.

Grassland is the dominant wildlife habitat type in the project area. This habitat type provides most of the forage for livestock; grazing pressure varies from moderate to heavy ir, the area. Grazing enhances habitat quality for some wildlife species (e.g., savanna sparrows, horned larks, and California ground squirrels) but reduces it for others (e.g.,

northern harriers, gopher snakes, and western rattlesnakes).

Many wildlife species use grasslands for foraging and breeding. Grasslands near open water, wetlands, and riparian habitats are used by the greatest number of wildlife species.

The tricolored blackbird, western pond turtle, and possibly tiger salamander use grasslands adjacent to wetlands for foraging, breeding, and over-wintering and are found in habitats similar to those found on the project site. Amphibians and reptiles residing in grasslands include the Pacific treefrog, western fence lizard, and gopher snake. Birds known to forage 1

in grasslands include the horned lark, savannah sparrow, tricolored blackbird, Brewer's blackbird, and western meadowlark. Mammals that forage or breed in grasslands include deer mice, California ground squirrels, striped skunks, and coyotes.

Small mammals in grasslands are impcrtant prey for a variety of predatory birds and-mammals, such as American kestrels, red-tailed hawks, black-shouldered kites, northern -

harriers, and coyotes.

Vernal Pool. Vernal pools are seasonally flooded landscape depressions that support a distinctive biota adapted to periodic or continuous inundation during the wet season and absence of either ponded water or wet soil conditions during the dry season.

The vernal pools on the site are typical of vernal pools throughout the Sacramento VaBey.

Sacramento Municipal Utility Dist..'ct Initial Study Rancho Seco Park Master Plan 29 September 9,1993

Vernal pool basins are dominated by coyote thistle, Fremont's goldfield, stipitate popcorn flower, woolly marbles, spike-primrose, common spike rush, hedge-hyssop, toad rush, water-starwort, and American pillwort. One vernal pool supports a large population of Green's legenere and a small population of Boggs Lake hedge-hyssop, both Category 2 candidates for federal listing. Another vernal pool supports a small populatiors of viscid orcutt grass, proposed for federal listing as endangered.

Vernal pools support a wide diversity and abundance of aquatic invertebrates and plant species, which in turn are food for vertebrate wildlife. Wildlife species observed foraging in vernal pools include great blue herons, mallards, cinnamon teals, common snipes, killdeer, greater yellowlegs, bull frogs, Pacific treefrogs, and western garter nakes.

Vernal Swale. The project site is traversed by swales arranged in integrated or dendritic drainage patterns with vernal pools. Vernal swales convey runoff during, and for short periods after, rainfall. Some vernal swales connect some vernal pools, thus filling or draining them, while others meander through vernal pool terrains but do not physically connect with individual vernal pools. Vernal swales are dominated by Mediterranean barley, coyote thistle, Italian ryegrass, toad rush, slender fescue, hairgrass, quaking grass, tarweed, and spikeweed.

Vernal swales have wildlife values similar to those of vernal pools and provide some foraging habitat and drinking water for birds, mammals, and other wildlife during the rainy season. Vernal swales are usually too ephemeral, however, to support an abundance of wildlife. Species observed using this habitat include Pacific treefrogs (tadpoles), western meadowlarks, western kingbirds, western bluebirds, scrub jays, and a variety of aquatic invertebrates.

Seasonal Wetland. Seasonal wetlands are characterized as seasonally wet areas that occur in shallow to deep depressions underlain by slowly permeable soils. Ruderal seasonal wetlands occur on the project site in the irrigated pasture. The largest seasonal wetland is an abandoned agriculture ditch that was originally used to return sheet flow from the irrigated pasture to an adjacent stock pond. Seasonal wetlands support mostly non-native species, including bird's-foot trefoil, curly dock, manna grass, common spike rush, and Mediterranean barley.

Seasonal wetlands within the project area provide some foraging habitat and drinking water for birds, mammals, and other wildlife during winter and spring. Amphibians such as Pacific tree frogs and western toads may be dependent on these wetland types.

Seep. Seeps are characterized as areas where water slowly oozes or seeps from

@ ground to the surface, saturating the soil. Seeps are dominated by toad rush, Mediterra-nean barley, Italian ryegrass, common spike rush, Bermuda grass, bird's-foot trefoil, sedge, quaking grass, Baltic rush, yellow sweetclover, bog rush, slenderfescue, and Dallas grass.

Sacramento Municipal Utility District initial Study Rancho Seco Park Master Plan 30 September 9,1991

Seeps provide foraging habitat and cover for aquatic invertebrates and amphibians.

Aquatic invertebrates inhabiting seeps are fed on by small mammals, amphibians, reptiles, and insectivorous birds.

i Emergent Marsh. Emergent marsh is dominated by perennial monocots that grow in permanently or semi-permanently flooded / saturated soil conditions. Emergent marshes are dominated by common spike rush; however, some have broad-leaved cattail or tule.

Emergent mirsh occurs along the margins of the lake and around larger stock ponds.

Emergent marshes provide high-quality foraging habitat, breeding habitat, and cover for many waterbirds. small mammals, reptiles, and amphibians. Emergent marshes in the project area provide important foraging habitat for fish-eating bird species, such as American bitterns, great blue herons, great egrets, and belted kingfishers. These aquatic habitats also attract mallards, American coots, common moorhens, and other water birds.

Several species, such as marsh wrens, song sparrows, and red-winged blackbirds, nest m cattails and other emergent vegetation.

Wildlife species commonly using these habitats include great blue herons, mallards, cinnamon teals, marsh wrens, red-winged blackbirds, raccoons, common garter snakes, and Pacific treefrogs. Skunks, California voles, and house mice may also frequent the marsh habitats in the project area.

Juncus Meadow. Juncus meadows are dominated entirely by bog rush. Juncus 4

meadow habitats offer similar values to wildlife as seeps, with the addition of escape and i

roosting cover provided by dense vegetative growth of juncus.

Willow Riparian. The willow riparian woodland is found in a thin band bordering the lake and is characterized by native willow species with an overhead canopy cover i

exceeding 20% The dominant species are Goodding's willow, with an occasional Fremont's I

cottonwood.

Willow riparian habitats provide cover, breeding, and foraging habitat in an area with little tree or shrub cover and are therefore used by a variety of wildlife species. The proximity of willow riparian habitat to the adjacent annual grassland in the project area increases its value to wildlife. Foliage-gleaning birds such as warblers and vireos forage in cottonwoods and thickets of willows, while purple finches and lesser goldfinches feed on willow buds and catkins. Fly-catchers, northern orioles, and western kingbirds nest in the taller riparian trees and forage out over the surrounding juncus meadow, open water, and I

emergent marsh.

i This habitat provides nesting and rearing cover for a variety of common birds, including scrub jays, song sparrows, house wrens, and Bewick's wrens. The trees in this habitat are used by a variety of bird species as perches, including double-crested cormorants, belted kingfishers, northern harriers, western kingbirds, barn swallows, tree swallows, red-tailed hawks, and great horned owls.

i Sacramento Municipal Utiliy District Initial Study Rancho Seco Park Master Plan 31 September 9,1993

I e

This habitat produces abundant aquatic and terrestrial invertebrates that are prey for amphibians and reptiles, such as Pacific treefrogs, common garter snakes, and western terrestrial garter snakes, and for insectivorous birds, such as yellow-rumped warblers, northern flickers, and Nuttall's woodpeckers. Small mammals found in riparian habitats include shrews, voles, and mice.

Ephemeral Drainage. Ephemeral drainages are unvegetated or sparsely vegetated channels with well-defined beds and banks that convey storm runoff only during, and for a brief period after, storms but are dry for the romainder of the year. The majority of the ephemeral drainages are narrow (1-3 feet wide) and deeply cut (1-3 feet deep); however, a few have average widths exceeding 5 feet. Although most ephemeral drainages are unvegetated, sparsely vegetated drainages are often dominated entirely by coyote thistle.

Mediterranean barley, Italian ryegrass, toad rush, and common spike rush were also found in ephemeral drainages on the project site.

Ephemeral drainages, like vernal swales, provide habitat for a variety of wildlife species. Ephemeral drainages in the project area may provide seasonal habitats for amphibians; small mammals, such as raccoons and striped skunks; and waterbirds, such as egrets and herons, that feed on amphibians, aquatic reptiles, and invertebrates. Species observed using this habitat in the project area include Pacific treefrogs (tadpoles), western meadowlarks, western kingbirds, western bluebirds, scrub jays, and a variety of aquatic invertebrates.

Open Water. Open water includes the Rancho Seco Lake and severallarge stock ponds. This habitat typically has a water depth greater than 2 feet, which intergrades with emergent marsh at its fringes. Open-water habitat is unvegetated or is sparsely vegetated with free-floating and submerged rooted aquatic plants, including pondweeds, lesser duckweed, mosquito fern, and mare's-tail water-milfoil.

The open water component of the stock ponds and the Rancho Seco Lake provides moderate-to high-quality habitat for wildlife species.

The Rancho Seco Lake provides valuable year-round drinking, foraging, bathing, resting, and breeding opportunities for a variety of wildlife species. The willow riparian forest and tule/ cattail marsh established around the ponds provide wildlife cover. This habitat provides drinking water for mammalia species such as mule deer, coyote, and grey fox. It also provides foraging habitat for raccoons and striped skunks that could feed on amphibians in the ponds, such as bullfrogs and Pacific tree frogs. The open water provides suitable foraging and resting habitat for dabbling ducks (mallards, gadwalls, and northern pintails) and other waterbirds, including American coots and pied-billed grebes.

Although stock ponds were developed to provide drinking water for livestock, they greatly enhance wildlife diversity in the area. Waterbirds, including a variety of waterfowl and shorebird species, use the ponds in winter. Mallards, cinnamon teals, gadwalls, and common goldeneyes use the ponds for foraging and resting. Other water-dependent animals Sacramento Municipal Utility District initial Study j

Rancho Seco Park Master Plan 32 Sep: ember 9,1993

4 forage or breed at stock ponds in the project area, including great blue herons, snowy egrets, American coots, greater yellowlegs, belted kingfishers, bullfrogs, and Pacific treefrogs.

Irrigated Pasture. Four irrigated pastures on the site are large parcels that are currently or were historically irrigated during the dry season, grazed by livestock, and dominated by non-native grass and forbs species. One pasture has been abandoned and is no longer irrigated; this pasture is dominated by Mediterranean barley. The other three irrigated pastures have a prevalence of hydrophytic vegetation, including sedge, bird's-foot trefoil, Burmuda grass, rabbit's-foot grass, and annual bluegrass.

Although cattle grazing keeps the irrigated pasture vegetation too low and sparse for good nesting habitat, it does provide some foraging hrloitat for raptors, songbirds, rodents, and snakes. Raptor species that may forage in the irrigated pasture include red-tailed hawks, northern harriers, American kestrels, great horned owls, and barn owls. Wildlife species observed in the irrigated pastures include black-tailed hares, killdeer, savannah sparrows, Brewer's blackbirds, brown headed cowbirds, tricolored blackbirds, black-shouldered kites, and western meadowlarks.

Ornamental. Ornamental vegetation was planted or " volunteered" and results from landscaping of the park and rural residential areas within the project area. The ornamental habitat is dominated by cultivated plant species, including weeping willow, fruitless mulberry, elm, juniper, oleander, magnolia, redwood, and blue gum.

Ornamental trees growing near houses and in the park are used for perching by raptors, such as red-tailed hawks and American kestrels. Ornamental vegetation provides nesting and foraging habitat and cover for common bird species that use non-native plant species, including American robins, American crows, northern mockingbirds, white-crowned sparrows, Anna's hummingbirds, and house finches. Mammals such as Virginia opossums and brush rabbits were also observed visiting this habitat type.

Wetland Delineation. Wetlands were delineated using the 1987 Corps Wetland Delineation Manual (Environmental I2boratory 1987). A total of 199.48 acres of waters of the United States (41.08 acres of wetlands and 158.40 acres of other waters of the United States) and 89.89 acres of nonjurisdictional wetlands (i.e., irrigated pasture) were delineated at the 1,600-acre site. A summary of the ju isdiction status and acreage habitat is provided in Table 7.

Special-Status Plant and Wildllre Species Surveys. Field surveys were conducted at the site throughout winter, spring, and summer 1993, to identify special-status plant and wildlife species and suitable habitat for wildlife species. A total of 13 special-status plant species and 21 wildlife species were determined to have potential to occur at the project site. Of these species, three special-status plant species were located at the site: Boggs Lake hedge-hyssop, Greene's legenere, and viscid orcutt grass.

Sacramento Municipal Utility District initial Study Rancho Seco Park Master Plan 33 September 9,1993

Table 7. Summary of Jurisdiction Status and Acreage Habitat 1

Jurisdictional Acres Upland /Non-Habitat Other Waters Jurisdictional Total Types of the U.S.

Wetlands Acres Acres Annual grassland / developed areas' 1,310.63 Vernal pool 20.25 Vernal swale 337 Emergent marsh 1.92 Open water 154.59 Willow riparian woodland 13.75 Irrigated pasture 89.89 Juncus meadow 1.15 Seep 0.53 Ephemeral drainage 3.81 Seasonal wetland 0,11 Subtotal 158.40 41.08 1,400.52 Total 1,600.00

• Acres reported for annual grassland / developed areas include roads, buildings, and existing landscaped park facilities.

Source: Jones & Stokes Associates 1993a.

l 34

Three special-status fairy shrimp species were also located: vernal pool fairy shrimp, California linderiella, and vernal pool tadpole shrimp. These species were found in vernal pools throughout the site where maximum ponding was 4 inches or greater.

Black-shouldered kites and northern harriers were observed foraging at the project site. No other special-status wildlife species were located at the site during intensive field surveys, although suitable habitat was located for California tiger salamanders, western spadefoot toads, western pond turtles, Swainson's hawks, burrowing ow!s, Cooper's hawks, ferruginous hawks, golden eagles, sharp-shinned hawks, merlins, prairie falcons, short-eared owls, yellow warblers, tricolored blackbirds, and American badgers.

Explanation of Checklist The development of the golf course and related park uses will alter the number, type, and diversity of species on the site. The existing annual grassland will be replaced with turf grasses; ornamental landscaping; and a variety of native and non-native plants, shrubs, and trees.

It is possible that golf course development may reduce the numbers of unique, rare, or endangered plants; this issue will be addressed in the EIR. The golf course will also introduce new species of plants into the area. Development of the park master plan may result in the reduction of irrigated pasture and cattle grazing.

Based on the information provided, it is hereby determined through this initial study that the issue of " Biological Resources" will require further analysis in the program-level EIR. The EIR will discuss wetland and nonwetland communities, including vegetation and habitat types. Special emphasis will be placed on the description of wetlands and vernal pools. The EIR will include a wetland mitigation plan.

Mitigation Measures The following mitigation measures will be considered in the EIR analysis:

1.

A Section 404 permit, including an agency-approved wetland mitigation plan, will be obtained from the Corps before issuance of a grading permit.

2.

A Section 1601 streambed alteration agreement from DFG will be obtained before issuance of a grading permit.

3.

An erosion and sediment control plan will be submitted to Sacramento County for review and approval before issuance of a grading permit.

Sacramento Municipal Utility District lnitial Study Rancho Seco Park Master Plan 35 September 9,1993

i i

i Xcs Ma\\be

5. Noise. Will the proposal result in:

a.

Increases in existing noise audible levels?

1 b.

Exposure of people to severe noise levels?

1 c.

Increase in radio or television noise interference?

1 Environmental Setting The Rancho Seo Park site is relatively remote from population centers. Noise levels are relatively low and related primarily to ongoing recreational activities at the park.

Explanation of Checklist Construction of the golf course and related park uses will increase the noise levels onsite; however, people will not be exposed to severe noise levels and no interference in radio or television noise is anticipated. The only noise concern is construction-related noise impacts on residences scattered near the site.

Mitigation Measures SMUD will comply with the following mitigation measures; no further analysis in the program-level EIR is proposed.

1.

Hours of construction activity throughout the duration of project construction will be limited to 6:00 a.m. to 7:00 p.m. Monday through Saturday (non-holidays). A telephone number will be made available for noise complaints.

2.

All construction equipment powered by internal combustion engines will be properly muffled and maintained to minimize noise. Equipment will be turned off when not in use.

Yes Maybe

6. Light and Glare. Will the proposal produce:

a.

New light or glare?

1 Sacramento Municipal Utility District initial Study Rancho Seco Park Master Plan 36 September 9,1993

4 Envimnmental Setting The Rancho Seco site is relatively remote from population centers and existing lighting levels in the area are low.

Explanation of Checklist Construction of the golf course and related park uses will increase the amount of lighting in the area. Although plans have not been finalized, it is likely that street lighting will be provided at the site. The clubhouse facility will also probably have security lighting in the parking lot and other clubhouse facilities. Lighting will probably be provided at the restrooms and the golf course maintenance facility. The driving range will also be lighted.

These new sources of light should not be of significant concern because of the limited amount of development in the area.

Mitigation Measures SMUD will comply with the following mitigation measure; no further analysis in the program-level EIR is proposed.

1.

All outdoor lighting will be directed downward and shielded such that no lighting i

is directed upward or toward wetland preserve areas.

]

i yrs Maybe lh

7. Land Use. Will the proposal result in:

)

l a.

A substantial alteration of the present or j

planned land use of an area?

_X_

]

.i i

i Envimnmental Setting The Rancho Seco site is designated for public and quasi-public use by the 1973 Sacramento County general plan (Morse pers. comm.). The site is zoned AG-20 (pertranent agriculture acre minimum parcel size) (Dakins pers. comm.). Lands surrounding the

)

Rancho Seco site are also designated and zoned for agnicultural use with lands to the north, south, and east zoned for 80-acre minimum parcel sizes and lands to the southwest zoned for agricultural-residential use (5-acre minimum parcel sizes). County staff do not envision any changes to the agricultural land use designations in this area for the next 20 years (Morse pers. comm.). Urban services are generally not provided in this area.

Sacramento Municipal Utility District Initial Study Rancho Seco Park Master Plan 37 September 9,1993

Sacramento County is in the process of updating the general plan. The revised draft (December 9,1992) land use element also designates the site as public and quasi-public use.

Sacramento County has prepared a residential-open space land use table to designate the uses permitted within each of the zoning classifications. Based on this table, public parks and ancillary uses are considered a permitted use within the agricultural zones. Other permitted uses within the agricultural zone include commercial riding stables and boarding stables and wildlife preserves. SMUD staff considers expansion of the public park at the site to be consistent with the general plan land use designation and zoning classification.

Sacramento County staff have stated that there are no other projects in die vicinity of the Rancho Seco site that would contribute to cumulative land use impacts (Dakins pers.

comm.).

Explanation of Checklist The Rancho Seco site is presently used as a public park. The land use would remain of an open space character; no substantial alteration of the land use is proposed.

The program-level EIR will discuss the following land use issues:

consistency with the goals and policies of the Sacramento County general plan, a

particularly relating to provision of recreational services; conversion of vacant land to developed land uses; and a

growth-inducing aspects of the project.

a Yrs M ehe En

8. Natural Resources. Will the proposal result in:

a.

Increase in the rate of use of any natural 1

resource?

b.

Substantial depletion of any nonrenewable natural resource?

1 Explanation of Checklist Development of the golf course and related park uses will increase the demand for water for irrigation and domestic purposes. This issue will be addressed in the EIR under the topic " Water Resources".

Sacramento Municipal Utility District Initial Study Rancho Seco Park Master Plan 38 September 9,1993

i Yu Maybe En

9. Risk of Upset. Does the proposal involve:

)

a.

A risk of an explosion or the release of hazardous substances (including, but not limited to, oil, pesticides, chemicals, or radiation) in the event of an accident or upset conditions?

.X_

Explanation of Checklist Development of a golf course and related park uses will result in the use and storage of hazardous materials such as petroleum products, pesticides (including herbicides and fungicides), and fertilizers. The golf course maintenance facility will include a chemicals room and a fertilizer room. Aboveground fuel tanks are proposed for gas and diesel, in addition to a lift and grease pit mechanics area. The project is also proposing expanding and revising the wastewater treatment facility to meet State of California Title 22 waste-water reclamation requirements to allow reclaimed wastewater to be used as golf course irrigation water.

Mitigation Measures SMUD will comply with the following mitigation measures; no further analysis in the program-level EIR is proposed.

1.

Fertilizer and pesticide storage will be limited to available covered space only.-

Outdoor storage of excess quantities will not be allowed.

a 2.

Only chemicals approved for use on the golf course will be stored in the maintenance facility at any time. Leftover chemicals from any one-time applica-tion will not be stored but will be properly disposed of.

3.

Maintenance vehicles will transport only sufficient quantities of fertilizers and/or pesticides to complete the current day's work.

All leftover chemicals and application equipment will be returned to the maintenance facility when not in use and at the end of every workday.

4.

Records will be kept of all chemical applications, in accordance with California Department of Agriculture requirements.

5.

No applicator rinse waters or any other waters known to contain fertilizer or pesticides will be allowed to enter surface waters, including any storm drains or other conveyances that drain to surface waters, at any time. Disposal of such waters will be directed to the wastewater system.

i Sacmmento Municipal Utility District InitialStudy Rancho Seco Park Master Plan 39 September 9,1993

I 4

6.

The golf course superintendent will develop and implement a chemical spill response plan. The plan will include at a muumum-a.

Posting of a requirement for immediate notification of the Sacramento j

County Department of Environmental Health in the event of a spill.

b. Specifications for spill cleanup equipment that is adequate to contain and clean up any solid or liquid spill and that will be stored at the maintenance facility.

Description of procedures to be followed in the event of a solid or liquid spill, c.

including procedures to prevent spilled material from entering a storm drain, wetland, or waterway.

7.

The design of the golf course maintenance facility will be submitted to the Herald Fire District and Sacramento County Health Department for review and approval.

8.

Any storage tanks (gasoline, diesel, or other hazardous materials) will be designed to the satisfaction of the Sacramento County Department of Environ-mental Health. Any storage of gasoline in aboveground or underground tanks is required to have Phase I and Phase II vapor recovery equipment.

9.

If required by state law because of the amount of hazardous materials to be stored onsite, SMUD will submit a business plan to the Sacramento County Health Department.

Yes Masbe

10. Population. Will the proposal.

a.

Alter the location, distribution, density, or growth rate of the human population of an area?

_X_

Explanation of Checklist The park site is relatively remote from population centers. Development in the vicinity of the site has been limited and generally consists oflow-density ranchettes. As of 1989, the permanent population within a 2-mile and 5-mile radius of the site was estimated at 80 and 880, respectively. (SMUD 1991.)

Development of the golf course and related park uses is intended to serve existmg population and land uses within the 30-mile trade area of the golf course. No extension of utilities offsite is proposed. No further analysis in the program-level EIR is proposed.

l Sacramento Municipal Utility District Initial Study Rancho Seco Park Master Plan 40 September 9,1993

a 4

Yes Maybe B

11. Housing. Will the proposal:

a.

Affect existing housing or create a demand for additional housing?

1 Explanation of Checklist i

As stated earlier, the Rancho Seco Park is relatively remote from popu ation centers and development in the area generally consists of low-density ranchettes. Invelopment of the golf course and related park uses is intended to serve existing population and land uses within the 30-mile trade area of the golf course. No extension of utilities offsite is proposed.

No housing will be affected by the project and the project does not create a demand for additional housing. No further analysis in the program-level EIR is proposed.

Yes Maybe

12. Transportatior./ Circulation. Will the proposal result in:

a.

Generation of substantial additional vehicular movement?

.2_

b.

Effects on existing parking facilities or demand for new parking?

1 c.

Substantial impact upon existing transportation systems?

.Z_

d.

Alterations to present patterns of circulation or i

movement of people and/or goods?

1 e.

Alterations to waterborne, rail, or air traffic?

1 f.

Increase in traffic hazards to motor vehicles, bicyclists, or pedestrians?

1 Environmental Setting i

The existing access point for the park is Twin Cities Road (State Highway 104), a two-lane roadway governed by Caltrans. Twin Cities Road connects the project site to State Route 99 and Interstate 5 to the west and State Routes 124 and 88 to the east. This access point was designed to accommodate the employees associated with operation of the nuclear power plant. No modifications to the access point are proposed.

Sacramento Municipal Utility Disuict Initial Study Rancho Seco Park Master Plan 41 September 9,1993

~

Year 1991 traffic counts (Caltrans 1991a) indicate that the annual average daily traffic on Twin Cities Road is 1,200 vehicles east of the project site and 1,350 vehicles west of the site. The road carries 160 vehicles in the project vicinity during its peak hour.

j In the project vicinity, the average accident rate on Twin Cities Road from 1988 l

through 1990 was 1.09 accidents per million vehicle-miles traveled (Caltrans 1991a). The r

statewide average accident rate for the same type facility is 2.03 accidents per milhon i

vehicle-miles traveled.

I The City of Galt is in the process of widening Twin Cities Road from its interchange with State Route 99 to about 1.7 miles east (Forga pers. comm.). This segment will be widened to accommodate a two-way center left-turn lane. Caltrans is also realigning about 0.5 mile of Twin Cities Road near Rancho Seco Park to remove some sharp curves (Forga pers. comm.). No other improvements are currently planned for Twin Cities Road in the project vicinity.

1 Average daily traffic conditions were analyzed on Twin Cities Road for existing and i

existing-plus-project conditions. The quality of traffic service provided by a roadway is measured by its level of service (l.OS). This method uses a letter rating to describe the driving conditions for a particular roadway. The letters A through F represent the best to worst driving conditions, respectively.

i Because Twin Cities Road is a two-lane highway, it was analyzed using standard analysis methods for two-lane rural highways as described in the 1985 Highway Capacity i

Manual (Transportation Research Board 1985). For a rural highway, LOS A indicates the highest quality of traffic service where motorists can travel at their desired' speed with almost no platoons of three or more vehicles. LOS F represents heavily congested flow, with demand exceeding capacity and speeds below capacity speed. The characteristics of traffic flow associated with each level of service for two-lane rural highways are described i

in Table 8.

Twin Cities Road was evaluated assuming its general conditions to be a level terrain, 65/35 peak-hour directional split,50% no passing zones,10-foot travel lanes, no shoulders, 10% trucks, and 60 mph design speeds.

Existing Conditions. Caltrans defines the acceptable level of service for Twin Cities Road to be LOS C or better. The analysis of existing conditions on Twin Cities Road indi-cates that this roadway is currently operating at LOS B.

l The 1991 Route Segment Report (Caltrans 1991b) indicates that Twin Cities Road, between the project access and the Sacramento County line, can carry about four and a half i

times the traffic it is currently carrying, before its service drops below desirable levels. The i

segment of this road around Angle Road in the community of Clay can carry about one and a half times the traffic it is currently carrying, before its service drops below desirable levels.

Sacramento Municipal Utility District initialStu&

Rancho Seco Park Master Plan 42 September 9,1993

l o

l Table 8. I2 vel of Service Definitions for Two-Lane Rural Highways i

12 vel of j

Service Description A

Represents free-flow conditions. Passing demand is well below passing capacity, and almost no platoons of three or. more vehicles are observed. Drivers are delayed no more than 30% of the time by slow-moving vehicles.

B Flow is stable. Passing demand equals the passing capacity, and the number of platoons forming in the traffic stream begins to increase.

Drivers are delayed up to 45% of the time on the average.

C Flow is stable, but it is susceptible to congestion due to turning traffic and slow-moving vehicles.

Chaining of platoons and significant reductions in passing capacity begins to occur. Drivers are delayed up to 60% of the time.

D Traffic flow approaches unstable conditions. Passing demand is very high, while passing capacity approaches zero.

Passing becomes extremely difficult, and platoon sizes of 5-10 vehicles become common.

Drivers are delayed up to 75% of the time.

E Operating conditions at capacity are unstable and difficult to predict.

Passing is virtually impossible, and platooning becomes intense when slower vehicles or other interruptions are encountered. Drivers are j

delayed more than 75% of the time.

-l 2

F Represents heavily congested flow. Traffic demand cxceeds capacity, and speeds ar'.: below capacity speed.

l Source: Transportation Research Board 1985.

6 43

i l

The existing conditions on Twin Cities Road was also analyzed usi the Highway Capacity Manual method of analysis described above. This analysis ind. ates that this roadway is currently operating at LOS B.

The following criteria were used to determine the level of significance of a traffic and 1

circulation impact. An impact was considered to be significant if it would:

cause a roadway operating at an acceptable LOS (A, B, or C) to deteriorate to

=

an unacceptable LOS (D, E, or F);

cause an increase in the traffic volume at a roadway that is already operating at a

an unacceptable LOS; substantially alter present patterns of vehicle circulation or movement; or a

increase traffic hazards to motor vehicles, bicyclists, or pedestrians.

a Existing-Plus Project Conditions. The trip generation rates used for the proposed golf course were obtained from Trip Generation (Institute of Transportation Engineers 1991).

The number of trips generated by the golf course was increased by 10% to estimate the trips generated by expanding the existing recreational facilities. The trip generation analysis was conducted for a Saturday, assuming the proposed recreational facilities would generate the highest number of trips on this day. Results of the trip generation analysis indicate that the proposed project would generate 840 trip ends on a Saturday, with 91 trips during its peak traffic-generating hour on that day.

A trip distribution pattern was developed for the proposed project based on the location of developments surrounding the project site. This pattern estimates that 70% of the people visiting the site would use Twin Cities Road west of the site, while the remaining 30% would use Twin Cities Road east of the site.

To analyze the worst-case traffic conditions, the number of trips generated by the project during its peak hour on a Saturday was added to the existing peak-hour volumes on Twin Cities Road. Results indicate that Twin Cities Road east and west of the project site would continue to operate at LOS B with the addition of the project traffic.

The inteisection of Twin Cities Road and the project access is controlled by stop signs at the project access. Preliminary analyses indicate that this intersection would operate at an acceptable level under existing-plus-project conditions, and no improvements are required.

Explanation of Checklist Development of the golf course and park master plan would generate substantial traffic; however, the traffic analysis indicates that no significant adverse impacts on the level Sacramento Municipal Utility District InitialStudy.

Rancho Seco Park Master Plan 44 Septernber 9,1993

a 4

of service or roadway capacity would result from implementing the project. Parking will be provided to accommodate increased use at the facility. No mitigation is required; no further analysis in the program-level EIR is proposed.

Yes Maybe Na j

13. Public Services. Will the proposal have a significant effect upon or result in a need for new or altered governmental services in any of the following areas:

a.

Fire protection?

_X_

b.

Police protection?

X_

c.

Schools?

_X_

d.

Parks or other recreational facilities?

.X_

e.

Maintenance of public facilities (other than SMUD's) including roads?

_X_

f.

Other governmental services?

_X_

Environmental Setting i

Fire Protection. The Herald Fire District is responsible for providing emergency j

services and structural fire protection; the California Department of Forestry and Fire Protection (CDF) is responsible for providing wildland fire protection. According to staff at the Herald Fire District, the number of calls has been low since SMUD assumed respon-sibility for maintenance at the park (Hendrickson pers. comm.). Increase in use would probably increase the demand for emergency and fire protection services.

Law Enforcement. SMUD assumed responsibilities for operation of the Rancho Seco Park on September 8,1992. SMUD maintains a security force whose primary responsibility j

is the protection of Rancho Seco nuclear power plant against sabotage and the health and safety of the employees and the general public. The security force patrols the park at least once every hour from 10:00 a.m. to dark. The security force is comprised of security officers, not peace officers, who have the same powers of arrest as a citizen. The Sacra-mento County Sheriffs Department is contacted immediately for any incidents or altercations. SMUD maintenance people also monitor park users.

The Sacramento County Sheriffs Department was contacted to determine existing demand and possible future demand from development of the golf course and related park uses. According to Sheriffs Department staff, the existing park requires minimal law enforcement services (Manzari pers. comm.). A golf course typically does not demand a lot of service either; however, it is possible that the trails, comfort stations, and other uses could result in increased demand for law enforcement services.

Sacramento Municipal Utility District initial Study Rancho Seco Park Master Plan 45 September 9,1993

w 3

Parks._ Rancho Seco Park is a public park that is operated and maintained by SMUD.

For additional information the reader is referred to the " Project Description" -

4 Public Facilities. No other public facilities that would be affected by the project have been identified.

Explanation of Checklist Development of the golf course and other park uses would probably increase the demand for emergency services, fire protection, and law enforcement, depending _on the characteristics of the users and the design of the park.

Development of the golf course and park will not have a significant effect on schools, parks, or other recreational facilities; maintenance of public facilities; or other governmental services. No housing is being provided; therefore, no increase in demand for schools is l

anticipated. Since SMUD is maintaining the park, no increase in maintenance of parks or other recreational facilities provided by the county is anticipated.

Mitigation Measures 3 MUD will comply with the following mitigation measures to reduce fire protection and law enforcement demand; no further analysis in the program-level EIR is proposed.

1.

SMUD will submit a site plan to the Herald Fire District and CDF for review.-

the Herald Fire District will review the site plan to determine the need for emergency circulation and possibly an emergency exit.

2.

SMUD will submit a site plan to the Sacramento County Sheriff's Department for review. The site _ plan design will include landscaping plans and locations of comfort stations and trails. The Sheriff's Department will be asked to comment and make suggestions to reduce demands for law enforcement services.

Yts Ma3be N_n

14. Energy. Will the proposal result in:

a.

Use of substantial amounts of fuel or energy?

J_

t b.

Substantial increase in demand upon existing sources of energy or require the development of l_

new sources of energy?

l Sacramento Municipal Utility District Initial Study Rancho Seco Park Master Plan 46 September 9,1993

a Explanation of Checklist Energy used for construction and operation of the golf course and related park uses is not significant on a local, regional, or national level.

Mitigation Measures SMUD will comply with the following mitigation measure; no further analysis in the program-level EIR is proposed.

1.

Design of the clubhouse, comfort stations, and maintenance buildings willincor-porate energy-efficient designs, such as passive and active solar designs for heating, cooling, and lighting of building facilities.

Yss Maybe No

15. Utilities. Will the proposal result in a need for new systems or substantial alterations to the following utilities:

a.

Power or natural gas (other than SMUD's)?

_X_

X b.

Communications systems?

c.

Water?

_X_

d.

Sewer or septic tanks?

_X_

e.

Stormwater drainage?

_K_

f.

Solid waste and disposal?

_X_

Environmental Setting Power or Natural Gas. SMUD has a 12-kilovolt (kV) electric system located in or adjacent to the existing roadway on the project site that services the existing uses. The system is fed from the north and south sides of the site and is connected as a back-up to one another. The system enters the site from the north overhead, spans to the southeast where it dips underground and continues to the south property line, where it makes a circuit tie.

From this circuit tie, it rises overhead and spans to the southwest property lines where it exits and continues west.

The system is adequate to service the future needs of the project; however, utility locations may conflict with the future site grading and improvement plans, thus requiring their relocation. Additionally, conversion of the overhead poleline to an underground line may be desired to avoid conflict with future site improvements or for aesthetics purposes.

Sacramento Municipal Utility District Initial Study Rancho Seco Park Master Plan 47 September 9,1993

l u

i The closest gas source from Pacific Gas and Electric Company (PG&E) is located near Highway 99, approximately 10 miles away from the site. No extension of gas services to the project site is proposed.

Communications Systems. Pacific Bell operates the underground and ovc-head.

i systems that service the miscellaneous existing uses at the site. The source for the existing and future telephone systems is located on the project's southerly boundary.

Water. The existing park well will supply domestic water to the proposed golf course.

The well will be tested and evaluated before it is used; additional treatment and monitoring facilities will be designed and constructed at the well site. Piping systems must be modified and extended to the proposed facilities. The proposed domestic demand will be below the capacity of the well.

l The project is considering four sources of water for irrigation of the golf course:

l surface drainage, treated wastewater effluent, existing wells, and water from the Folsom South Canal. For additional information the reader is referred to Item 3 of this checklist.

i Sewer or Septic Tanks. The project is proposing to collect sewage from the golf I

course and park facilities and pipe it to the existing sewage treatment system. The existing j

oxidation / evaporation pond will be expanded and followed by filtration to meet State of

)

California Title 22 wasterter reclamation requirements. The project is also proposing j

septic systems at the comfort stations. For additionalinformation the reader is referred to Item 3 of this checkiist.

Stormwater Drainage. Existing stormwater drainage flows to the Rancho Seco Lake or natural waterways. The infrastructure storm drain system required to serve the golf course will consist of piping used to capture storm runoff from the course and park site.

The water will be directed to the wastewater treatment effluent pump station for storage in the golf course lake. In addition, drainage from the course will be directed away from the Rancho Seco Lake, collected on the surface, and piped to the golf course reservoir to be stored for irrigation. For additional information, the reader is referred to Item 3 of this checklist.

Solid Waste and Disposal. Solid waste generated at the park is collected and disposed of at the county landfill.

Explanation of Checklist Development of the golf course and other park uses will increase the demand for water. The golf course is proposing the use of sewers and septic tanks. Stormwater drainage will be used to irrigate the golf course. These issues are addressed under Item 3 of this checklist.

Sacramento Municipal Utility District Initial Study Rancho Seco Park Master Plan 48 September 9,1993

u Development of the project would result in an increase in solid waste both from the park use and golf course maintenance activities.

Mitigation Measures SMUD will comply with the following mitigation measures; no further analysis in the program-level EIR is proposed.

1.

SMUD will provide recycling receptacles throughout the park to encourage recycling and minimize the amount of solid waste.

2.

SMUD will implement management practices to minimize the need to dispose of grass :lippings, leaves, and other organic materials offsite. Management practices to be considered include recycling grass clippings and composting leaves.

Yrs Masbe

16. Human Health. Will the proposal result in:

a.

Creation of any health hazard or potential health hazard (excluding mental health)?

.X_

b.

Exposure of people to potential health hazards?

.X_

Explanation of Checklist l

People will be exposed to potential health hazards related to pesticides, chemicals, and fertilizers used on the golf course and at the wastewater treatment facility. The reader is 1

referred to Item 9 of this checklist.

Yrs Masbe

17. Aesthetics. Will the proposal result in:

a.

The obstruction of any scenic vista or view open to the public, or will the proposal result in the creation of an aesthetically offensive site to public view?

,X.

Explanation of Checklist Rancho Seco Park is a public park. Construction of the golf course and related facilities will be open to public view; however, it will not obstruct any scenic vista or view Sacramento Municipal Utility District Initial Study Rancho Seco Park Master Plan 49 September 9,1993

h j

or create any aesthetically offensive site to public view. This issue will not be addressed in the program-level EIR.

Yes Maibe Nn-l

18. Recreation. Will the proposal result m:

t An impact upon the quality or quantity of existing a.

recreational opportunities?

_X_

Environmental Setting In 1970, SMUD constructed and filled a storage reservoir-(Rancho Seco Lake) to serve as a backup water source for the nuclear power plant. This 165-acre reservoir was designed to hold a capacity of 2,700 acre-feet. Pumping from the Folsom South Canal,in-i combination with surface runoff, is designed to maintain a' stable volume of water in the lake; however, drawdowns from the lake have occurred occasionally when required by reduced pumping from the Folsom South Canal.

Existing facilities at the park include:

a 160-acre lake, e

group camping facilities, a

18 campsites, j

a two reservable picnic areas, u

family picnic areas that can accommodate 100 or more persons, a

two boat launches, and a

six fishing piers.

a I2ke water is maintained at the same level year round; the fish population in the lake is catfish, blue gill, bass, and trout (seasonal).

The park has an established set of fees that includes fees for day use, recreational vehicle campsites, boat launch use, and group camping. SMUD has contracts with two concessionaires to provide food, beverages, and other miscellaneous articles and windsurfing equipment and waterfront activities.

t Attendance figures for park use from 1985 to 1993 indicate a peak use of 225,343 people in 1987 to a low of 160,000 people in 1992 (Miller pers. comm.).

.j l

-)

i I

i

~ Sacramento Municipal Utility District InitialStudy Rancho Seco Panic Master Plan 50 September 9,1993

~

s v

Explanation of Checklist Development of the golf course and related park uses will increase the quality and quantity of recreational opportunities. Additional information about the park master plan will be presented in the EIR; however, no analysis in the program-level EIR is proposed.

Yes Ma3be No

19. Archeological / Historical. Will the proposal result in:

a.

An alteration of a significant archeological or historical site, structure, object, or building?

_X_

r Envimnmental Setting A cultural resource records review of the 1,600-acre site was prepared in January 1993 (LSA Associates 1993). The study assessed the likelihood of prehistoric or historic sites occurring in the study area.

The archeological records search indicated that several archeological surveys have

~

been conducted immediately adjacent to and within a 0.5-mile radius of the site, but the entire project site has not been surveyed for prehistoric remains. The closest archeological surveys to the site found no evidence of prehistoric use; however, prehistoric sites around vernal pools have been recorded in Placer, Merced, Solano, and Napa Counties.

The closest known archeological site is an historic burial. This site is approximately 3 miles north and west of the project site.

A review was also conducted of the historical sources for the area to determine whether any potential historic sites or structures are located within the proje.ct area. This research included the following directories: California Historical Landmarks, California Points of Historic Interest, California Inventory of Historic Resources, Office of Historic Properties Directory, and the National Register of Historic Places. No national register or California landmarks are listed for the project area.

Explanation of Checklist Based on the limited surveys in the area, the known site distribution of vernal pools, the undeveloped condition of the project, and the few prehistoric sites in the immediate 2-mile area, the project site has a moderate potential for finding prehistoric resources.

Sacramento Municipal Utility District initial Study Rancho Seco Park Master Plan 51 September 9,1993

u No potentially historic structures or landmarks have been identified in the project area. Based on the regional history, the potential for finding significant historical resources (resources 50 years or older) is negligible.

Based on the information provided, it is hereby determined through this initial study that the issue of" Cultural Resources" will require further analysis in the program-level EIR.

The EIR will include the result:, of a cultural resources survey of the project site. In compliance with the National Historic Preservation Act, the following tasks will be completed:

background historical research, a

intensive pedestrian surveys, e

recordation of all identified sites, and a

preparation of a report including initial significance assessments.

a In Masbe En

20. Mandatory Findings of Significance a.

Does the project have the potential to degrade the quality of the environment, substantially reduce the habitat of a fish or wildlife species, cause a fish or wildlife population to drop below self-sustaining levels, threaten to eliminate a plant or animal community, reduce the number or restrict the range of rare or endangered plant or animal, or eliminate important examples of the major periods of California history or prehistory?

.X.

b.

Does the project have the potential to achieve short-term, to the disadvantage oflong-term, environmental goals?

_X_

Does the project have impacts which are indivi-c.

dually limited but cumulatively considerable? (A project may impact on two or more separate resources where the impact on each resource is relatively small, but where the effect of the total of those impacts on the environment is signi-ficant.)

_X.

d.

Does the project have emironmental effects which will cause substantial adverse effects on human beings, either directly or indirectly?

_X_

Sacramento Municipal Utility District initial Study Rancho Seco Park Master Plan 52 September 9,1993

a

)

s

\\

Explanation of CheckIlst t

The project has the potential to degrade the quality of the biological emironment; this issue will be addressed in the EIR.

No short-term environmental goals have been identified that would be eliminated with the project; this issue will not be discussed in the EIR.

Sacramento County staff have stated that no other projects in the project area would contribute to cumulative impacts on other resource areas (Dakins pers. comm.). The cumulative issues of concern are biological resources and water resources. These issues will be discussed in the EIR.

DETERMINATION 1

On the basis of the initial study prepared by SMUD in compliance with CEQA for the Rancho Seco Park Master Plan, I find:

l that the proposed project could not have a significant effect on the emiron-ment, and a NEGATIVE DECIARATION will be prepared.

_X_

that the proposed project may have a significant effect on the environment, and an ENVIRONMENTAL IMPACI' REPORT is required.

]

k C. 6mn%

Kim C. Smith, Project Manager Jones & Stokes Associates Concurred by:

Pat Frost Supervisor, Environmental Services Sacramento Municipal Utility District Date:

A he ?,If93 Sacramento Municipal Utility Duvict Initial Study Rancho Seco Park Master Plan 53 Sepember 9,1993

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CITATIONS I

Printed References l

California Air Quality Data. 1993. Volume XX-1988 to Volume XXIV-1992 - annual summaries.

California Air Resources Board.1982. California ambient air quality standards for carbon monoxide (sea level). Sacramento, CA.

California Department of Transportation.1991a.1991 route segment report. Sacramento, CA.

t

.1991b. Traffic volumes on California state highways. Sacramento, CA.

r Caltrans. See California Department of Transportation.

l Institute of Transportation Engineers.1991. Trip generation. Fifth edition.' Washington, DC.

LSA Associates, Inc. 1993. Cultural resources archival review Rancho Seco muni golf i

course, Sacramento County, January 11, 1993.

Prepared by Beth-Padon.

(LSA -

Project #CMG201.) Irvine, CA.

I Powell, R. D.1980. Implementation issues under the Clean Air Act for a size specific -

particulate matter standard. Pp. 49-58 in Frederic, E. R. (ed.). The technical basis for a size specific particulate standard. Air Pollution Control Association..Pittsburgh, PA.

t 4

Sacramento Municipal Utility District.1991. Initial study and proposed negative declara-l tion.

Rancho Seco nucleai generating station proposed decommissioning plan.

Sacramento, CA.

l SMUD. See Sacramento Municipal Utility District.

j l

Transportation Research Board.1985. Highway capacity manual. (Special Report 209.)

l National Research Council. Washington, DC.

H U.S. Environmental Protection Agency.1979. Air quality criterion for carbon monoxide.'

(EPA-600/8-79-022.) Washington, DC. -

1985. Compilation of air pollutant emission factors: Volume II mobile

~

sources. Fourth edition. (AP-42.) Ann' Arbor, MI.

Sacramento Municipal Utility District initia! Study i

Rancho Seco Park Master Plan 55 September 9,1993

Personal Communications Dakins, Don. Planning aide. Sacramento County Department of Planning and Community Development, Sacramento, CA. August 25,1993 - meeting with Kim Smith.

i Forga, Mike. Chief, special-funded studies, Caltrans, District 3, Marysville, CA. August 31 and September 8,1993 - telephone conversations with Angie Raygani and Kim Smith, respectively.

Hendrickson, Skip. Fire chief. Herald Fire District, Herald, CA. September 3,1993 -

telephone conversation with Kim Smith.

Manzari, Tom. Crime prevention specialist. Sacramento County Sheriff's Department, Sacramento, CA. September 2,1993 - telephone conversation with Kim Smith.

Miller, Ken. Senior project manager. Sacramento Municipal Utility District, Herald, C/t August 30,1991 - telephone conversation with Kim Smith.

Morse, Peter. Associate planner.

Sacramento County Department of Planning and Community Development. August 26,1993 - telephone conversation with Kim Smith.

~

Sacramento Municipal Utility District Initial Study Rancho Seco Park Master Plan 56 September 9,1993