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SITE INFORMATION AND CORRESPONDENCE
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2900 - Site Mitigation Program
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PR0009019
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SITE INFORMATION AND CORRESPONDENCE
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Last modified
6/18/2019 2:01:27 PM
Creation date
6/18/2019 1:30:24 PM
Metadata
Fields
Template:
EHD - Public
ProgramCode
2900 - Site Mitigation Program
File Section
SITE INFORMATION AND CORRESPONDENCE
RECORD_ID
PR0009019
PE
2954
FACILITY_ID
FA0004085
FACILITY_NAME
LLNL-SITE 300
STREET_NUMBER
0
STREET_NAME
CORRAL HOLLOW
STREET_TYPE
RD
City
TRACY
Zip
95376
CURRENT_STATUS
01
SITE_LOCATION
CORRAL HOLLOW RD
P_LOCATION
99
P_DISTRICT
005
QC Status
Approved
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WASTE DISCHARGE REQUIREMENTS -2- <br /> UNIVERSITY OF CALIFORNIA <br /> LAWRENCE LIVERMORE NATIONAL <br /> LABORATORY SITE 300 AND <br /> THE U.S. DEPARTMENT OF ENERGY <br /> ALAMEDA AND SAN JOAQUIN COUNTIES <br /> 6. The RWD and supplemental information describe the GWTS discharge as follows: <br /> Average Flow: 60 gallons per minute (gpm) (86,400 gallons per day (gpd)) <br /> Design Flow: 200 gpm (288,000 gpd) <br /> Constituents: The Discharger expects to achieve nondectable levels of <br /> VOCs in the effluent. <br /> 7. The Discharger proposes to airstrip the VOCs from the ground water with air <br /> sparging tanks capable of reducing the VOCs to nondetectable concentrations. The <br /> VOCs are subsequently adsorbed onto activated carbon, and the clean air is <br /> discharged. <br /> 8. 40 CFR 125.3 requires the Discharger use the Best Available Technology economically <br /> achievable (BAT) for waste treatment prior to discharge under an NPDES permit. <br /> Airstripping is the BAT for removing VOCs from ground water. Airstripping can <br /> reduce halogenated volatile organic compound concentrations in water to the minimum <br /> method detection limits of EPA Methods 601 and 602. Therefore, this Order provides <br /> a monthly median effluent limitation of nondetectable VOCs (less than 0.5 µg/1). <br /> 9. Downstream of the proposed discharge location, the Department of Fish and Game <br /> (DFG) owns and operates the Corral Hollow Ecological Reserve which is prime habitat <br /> for two species of frog whose population levels are declining. DFG has stated the <br /> habitat will be destroyed if Corral Hollow Creek flows continuously from late <br /> spring through early fall . Therefore, Provision C.2 prohibits the discharge from <br /> creating a continuous flow in Corral Hollow Creek between 1 May and 1 October of <br /> each year. Preliminary tests conducted by the Discharger show that the discharge <br /> likely will all infiltrate into the dry creek bed before reaching the Reserve. <br /> 10. The Board has adopted a Water Quality Control Plan, 2nd Edition, for the <br /> Sacramento-San Joaquin Delta Basin (5B) which contains water quality objectives for <br /> all waters of the basin. These requirements are consistent with that Plan. <br /> 11. Corral Hollow Creek is underlain by alluvial deposits consisting of permeable sand <br /> and gravel beds overlying clayey gravels interbedded with clayey sands. The <br /> alluvial deposits lie atop layers of interbedded sandstones and siltstones <br /> exhibiting moderate to high permeabilities, alternating with layers of interbedded <br /> siltstones and claystones of low to moderate permeabilities. <br /> 12. The beneficial uses of Corral Hollow Creek are recreation; aesthetic enjoyment; <br /> ground water recharge; fresh water replenishment; and preservation and enhancement <br /> of fish, wildlife and other aquatic resources. <br /> 13. The beneficial uses of the ground water are municipal , industrial , and agricultural <br /> supply. <br />
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