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4 <br /> A4URRAY & ASSOCIATES <br /> ENVIRONMENTAL SERVICESElvilf , <br /> 1n_ <br /> J411 <br /> CA <br /> November 24, 1990 <br /> Lambert Barnum <br /> P.O. Box 1071 <br /> San Andreas, CA 95249 <br /> 3 <br /> Dear Mr. Barnum: <br /> Ford Dealership,TracY, California <br /> Re: Final Report » Stan Mori <br /> This letter report summarizes our work for the source removal and sampling activities at <br /> the subject site, and presents the results of all laboratory testing completed to date. The <br /> i purpose of this work was to implement our Final Remedial Plan (FRP) and to obtain <br /> verification samples from the walls of the most recent <br /> cavato evalua tpdisposalosite loptonls.s <br /> were also collected from the stockpile of contaminated <br /> soil <br /> FIELD ACTIVITIES AND OBSERVATIONS <br /> Au e Barin s <br /> To accomplish the tasks outlined in the FRP, five large diameter (10 and 30 inch) auger <br /> i o remove the remaining waste <br /> borings were drilled to a depth of approximately 15 feet t <br /> ail contaminated soil found adjacent to the service garage. A vicinity map showing the site <br /> location is presented in Figure 1. A Site Plan showing auger hole locations relative to the <br /> former underground waste oil tank is shown in Figure 2. All five of the auger borings <br /> encountered contaminated soil at a depth of approximately 7 to 12 feet below the surface. <br /> Borings AH-4 and AH-5, encountered the least amount of contaminated BoringsAH--1,AH-2u <br /> H 2ttasoil and nd <br /> intersected clean fill material from the frrmer tank a <br /> AH-3, however removed approximately 6.0 yd3 of contaminated soil from a depth of 7 to <br /> nearly 12 feet below the surface. <br /> nd <br /> The borings were drilled using a truck mounted hydr AH 3 were pdri 1 dtusing�the 3U-inch <br /> diameter solid flyte augers. Holes AH-1, AH-2, and <br /> diameter auger, Borings AH-4 and AH-5 were driller at the intersections of AH-1 and <br /> AH-3, and AH-3 and AH-2 respectively with the 10-t ;s 11 auger. <br /> The drilling and soil remo4al activities were performed under the supervision -ctr ti- <br /> California Registered Geologist who selected the baring locations and collected �- <br /> verification soil samples. Approximately 7.5 cubic yards of.soil contaminated with primarily <br /> oil and grease.was removed for subsequent off-site disposal. <br /> (916)635.0839 FAX(916)652-1411 <br /> 2252 Fort Point Drive,Gold River,CA 95670 <br />