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January 25 , 1991 <br /> Mr. Steve Schneider <br /> San Joaquin County Public Health Services <br /> P.O.Box 2009 <br /> ( 1601 East Hazalton Avenue' <br /> Stockton, CA 95201 <br /> RECEAVED <br /> (209 ) 468 3400 <br /> FES 5 1991 <br /> Re: 275 Soil Excavation <br /> ENVIRONMENTAL HEALTH <br /> Dear Mr. Schneider: <br /> This letter addresses the 5 items mentioned in the PHS/EHD <br /> letter to Mr. Joe Mell dated 1/8/91. Additional investigative work <br /> is proposed in order to determine the final horizontal and vertical <br /> extent of the hydrocarbon'� contamin `tion in the subsurface soilsiand <br /> water of this site. is <br /> Item 1 . Approximately 220 cubic yards of oil and grease- <br /> contaminated soils were removed duiing the excavation. The Uniform <br /> Hazardous Waste Manifests are included as an attachment to this <br /> letter. The soils were transport8d by Baurle Trucking (US EPA ID <br /> # CAD980585780) to GSX 'Services �Iof California at Lokern Road, <br /> Buttonwillow, California '<(US EPA If.) # CAI) 980675276 ) . The manifest <br /> for the disposal of 5000' gallons of pit water that was pumped on <br /> July 12 , 1990 is also included in "an attachment to this letter. <br /> The water was disposed of by H & 4 Ship Service and transported to <br /> their disposal facility at 220 Chlina BAsin Street, San Francisco <br /> (US EPA ID # CAD004771166) . <br /> Item 2 . The report was reviewed by a state-registered <br /> professional and page 7 of 7 (TECO 8/14/90 Report) is included in <br /> this letter. <br /> Item 3 The soils were not analyzed for 8240-type compounds <br /> because none were detect i ed in soil samples collected during . the <br /> tank removal . TPHg/BTEX was analyzed for the soil samples <br /> collected for the product lines bvt not for the former wasteioil <br /> tank pit area. Four soil borings are planned to be installed <br /> during the well monior installation phase of this investigation. <br /> l'j� <br /> Item 4 As described inpage 3 of 7 on the 8/14/90 TFCC Report, <br /> the excavation of soils continued) until no soil staining or odor <br /> was observed. The soil samples were collected from directly above <br /> $ I <br /> the groundwater level in the saturated zone. Apparently there was <br /> a mix-up on notifying the -PHS/EHD o f the soil excavation activites . <br /> Item 5 The analytical results used to.,determine the extent of Ethe <br /> Oil and Grease contamination in, the soils has been defined. <br /> Analysis of the pit water sample' reveals detectable amountsof <br /> TPHg/BTEX. In order to better .1define any possible TPHg/BTEX <br /> contamination in the soils surrounding the tank pit, 4 soil <br /> borings are recommended". These will be place in positions <br /> immediately around the excavated larea as shown in the attached <br />