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k" KLEINFELDER <br /> November 3, 1988 <br /> File: 244119-00 <br /> Mr. Dan Clement <br /> City of Stockton <br /> Department of Public Works, Room 317 <br /> 425 North El Dorado <br /> Stockton, CA 95202 <br /> SUBJECT: Waste Oil-Water Separator Sump <br /> 134 S. Sutter Street <br /> Stockton, California <br /> Dear Mr. Clement: <br /> On October 11, 1988, a Kleinfelder geologist collected a soil sample from beneath a waste <br /> oil-water separator sump. A mixture of water and a dark oil-type material (Sample 16963). <br /> was collected from the fluid removed from the sump. <br /> The soil sample was analyzed on a rush turnaround schedule and constituents analyzed <br /> were below laboratory TMorting limits. Results of the soil sample analysis were presented <br /> in Kleinfelder' oveDretter report dated October 19, 1988. <br /> To assess potential disposal options for the sump contents, Sample 16963 was analyzed by <br /> Chemwest Analytical Laboratories for: total petroleum hydrocarbons extractable by GC- <br /> jD, benzene, toluene, ethylbenzene, and xylene by EPA Method 602; halogenated volatile <br /> âś“organics by EPA Method 601; cadmium, chromium, lead and zinc by ICAP scan; and PCBs <br /> by EPA Method 608. <br /> A petroleum hydrocarbon mixture was detected at 560,000 ug/l, and chromium and zinc <br /> were detected at 0.03 and 1.7 mg/l, respectively. All other constituents were below <br /> laboratory reporting limits. <br /> Visual inspection and analytical results indicate that the material pumped from the sump is <br /> a mixture of oil and water. The material should be properly disposed of by a licensed <br /> hauling and disposal company. <br /> KLEINFELDER 9795 Business Park Drive, Suite C, Sacramento, CA 95827 (916) 366-1701 <br />