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r ' M <br /> fJ� <br /> KLEINFELDER <br /> ,, 39 <br /> v <br /> Na ember 7, 1988 <br /> File: 24-I119-00 UX <br /> U <br /> v� <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 sod. 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 the constituents were <br /> below laboratory reporting limits. Results of the soil sample analysis were presented in <br /> Kleinfelder's cover letter 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 /> FID; benzene, toluene, ethvlbenzene, and xylene by EPA Method 602; halogenated volatile <br /> organics by EPA Method 601, cadmium, chromium, lead and zoic by ICRP scan; and PCBs <br /> by EPA Method 608. <br /> A petroleum hydrocarbon mixture was detected at 560,400 ug/l, and chromium and zinc <br /> were detected at 0 03 and 17 mg/1, 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 beproperly disposed of by a licensed <br /> hauling and disposal company <br /> -= �F« '�,r4 O <br />