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I <br />� t <br /> ' Mr.Stevo Schneider January 25, 1991 <br /> San Joaquin County Public Health Services <br /> P.O.Box 2009 <br /> (1601 East Hazalton Avenue) ; <br /> Stockton, CA 95201 <br /> (209) 468 3400 <br /> Re: 275 Soil Excavation �N�• FSB <br /> Dear Mr. Schneider: pFR NMEiVj <br /> This letter addresses the 5 items mer_tioned MinSEMh ,O�YEHD <br /> i 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 contamination in the subsurface soils and <br /> waiver of this site. <br /> Item 1. Approximately 220 cubic yards of oil and grease- <br /> contaminated soils were removed during the excavation. The Uniform <br /> Hazardous Waste Manifests are included as an attachment to this <br /> letter.. The soils were transported by Baurle Trucking (US EPA ID <br /> # CAD980585780) to GSX Services of California at Lokern Road, <br /> Buttonwillow, California (US EPA ID # CAD 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 & H Ship Service and transported to <br /> their disposal facility at 220 China BAsin Street, San Francisco <br /> (US EPA ID # CAD004771168) . <br /> t Item 2. The report was reviewed by a state-registered <br /> processional and page 7 of 7 (TFCC 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 detected in soil samples collected during the <br /> tank removal. TPHg/BTEX was analyzed for the soil samples <br /> collected for the product lines but not for the former waste oil <br /> tank pit area. Four soil borings are planned to be installed <br /> during the well monior installation phase of this investigation. <br /> Item 4 As described in page 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 alcove <br /> the groundwater level in the saturated zone. apparently there was <br /> a mix-up on notifying the PHS/EHD of the soil excavation activites. <br /> Item 5The analytical results used todetermine theextentof the - - - <br /> Oil and . Grease contamination in the soils has been defined. <br /> Analysis of the pit water sample reveals detectable amounts of <br /> TPHg/BTEX. In order to better define 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 area as shown in the attached <br />