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STATE OF CALIFORNIA PETE WILSON, Governor <br /> CALIFORNIA REGIONAL WATER UALITY CONTROL BOARD <br /> eENTRAL VALLEY REGION <br /> 3443 Routier Road, Suite A a € <br /> Sacramento, CA 95827-3098 <br /> PHONE: (916)361-5600 <br /> FAX (916)361-5686 <br /> 3 July 1992 <br /> R"E 'E I V,:, <br /> ,Y <br /> Mr. David Arnaiz J UL 0 7 1992 <br /> Vice President EWRONMENTAL HEALTH <br /> Arnaiz Development Co. , Inc. PERMIT/SERVICES <br /> P. 0. Box 8492 <br /> Stockton, CA 95208 <br /> PALM PLAZA SHOPPING CENTER, SAN JOAQUIN COUNTY <br /> This letter is in response to your 1 May 1992 letter, to clarify our <br /> conversation regarding the use of diesel contaminated soil . It is the general <br /> policy of this Board to encourage the treatment and/or reuse of petroleum <br /> contaminated soils. However, if any residual contamination remains in the <br /> soil , it must be demonstrated that reuse of the soil will not create a <br /> potential threat to water quality. Because of dwindling landfill capacities in <br /> the region, landfilling of these materials should be considered as a last <br /> resort, when a viable remediation and reuse alternative is available. <br /> Establishment of soil cleanup levels are site-specific, based upon proper site <br /> characterization, potential beneficial uses of water that could be impaired, <br /> local health and safety issues, and future exposures that may occur. <br /> In concept "spreading diesel contaminated soils that average 680 parts per <br /> million (ppm) total petroleum hydrocarbons, 1/8 inch thick, under an area <br /> designated to be covered with asphalt" as you described in our conversation is <br /> an acceptable approach for managing your waste. Unfortunately, because of <br /> severe staff and funding shortfalls, your report dated 22 April 1992 can not <br /> be reviewed to determine whether the proposed reuse of the 680 ppm <br /> contaminated soil is sufficiently "clean" to prevent impacts to water quality. <br /> Since we are unable to oversee your case at this time, you may proceed at your <br /> own risk. As such, we encourage you to use best management practices, i .e. use <br /> soils only as road base materials, make sure no diesel contaminated soils are <br /> in contact with ground water, soils are not placed in areas of drainage, and <br /> are not exposed to any surface water. Alternatively, you could isolate this <br /> soil and treat the hydrocarbons by exposure to air and sun, whereby cleanup <br /> could easily be accomplished within one summer. <br /> r <br /> CORI CONDON <br /> Assoc. Eng. Geologist <br /> cc: Mr. Mike Infurna, Environmental Management, San Joaquin County <br />