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c " I <br /> Geologka[Technia Inc. <br /> 2601 ZtvrisadGcalagicufandTnviMnmenwf5pui".tj <br /> MO&Io,CR 9sin <br /> (209)OX"24 <br /> February 9,1990 R E C E I V E C-A <br /> FES 15 '71 <br /> ENVIRONMENTAL HEALTH <br /> Mr. William Stewart PERMIT/SERVICES <br /> c/o Ben Curran <br /> Curran Real Estate and Insurance <br /> P.O. Box 414 <br /> Tracy,CA 95378-0414 <br /> RE: AGENDA FOR C01JNM/RWQCB MEETING <br /> 5151N8,r,r nTH STREET <br /> TRACY,CAL?hORMLA <br /> Gentlemen: <br /> I am writing regarding the environmental services project Geological Technics Inc.and SEMCO <br /> are performing in your behalf on 515 West 11th Street in Tracy,California. As you are aware, <br /> the soil RAP has been implemented and several aspects of that work have been completed. <br /> However,additional work must be performed in order to accomplish the goal of the RAI'. The <br /> goal of the soil RAP was to remove the contaminated soil from around the tanks and reduce the <br /> chance of future leaching of hydrocarbon from the soil into the ground water. <br /> To date,the following tasks have been completed on the soil RAP: <br /> i 1. Testing cf approximately 250 cubic yards that had been <br /> excavated at the time the tanks were removed. One composite <br /> sample was tested per 50 cubic yards. Three samples were <br /> collected for each composite. That data is attached as GT-18 <br /> 1ABC through GT-18 5ABC. Each of the samples were <br /> nondetected for the analytes tested. <br /> 2. A sump was dug in the northeast corner of the excavation and <br /> the excavation was dewatered to a depth of about ]5 feet. A <br /> total of 8,000 gallons was removed and stored in an above <br /> ground swing tank. One sample was collected and analyzed for <br /> TPH. That data is attached as GT-18:;Nater I (tank)and GT-18 <br /> Sump(excavation water samrile), <br /> 3. While the excavation was dewateted, the excavation was <br /> - -------.-- — deepened-to-a-total-depth-of_14-feet.--This-material—was <br /> — — <br /> stockpiled,sampled,and tested and the pile was covered with : <br /> plastic. That data is recorded as GT-18 6ABC through GT-18 <br /> �I 8ABC: <br />