Laserfiche WebLink
_ g <br /> - _ <br />............................. <br /> ti. <br /> MURRAY & ASSOCIATES <br /> ENVIRONMENTAL SERVICES <br /> j., <br /> November 24, 1990 <br /> Lambert Barnum <br /> P.O. Box 1071 <br /> San Andreas, CA 95249 <br /> Dear Mr. Barnum: <br /> Re: Final Report - Stan Mori Ford Dealership, Tracy, California <br /> This l-tter 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 /> 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 excavation. Composite soil samples <br /> were also collected from the stockpile of contaminated soil to evaluate disposal options. <br /> FIELD ACTIVITIES AND OBSERVATIONS <br /> Auger R2dn- s <br /> To accomplish the tasks outlined in the FRP, five large diameter (10 and 30 inch) auger <br /> borings were drilled to a depth of approximately 15 feet to remove the remaining waste <br /> oil 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 /> Barings red and Ante encountered the least amount of contaminated soil and actually <br /> nd <br /> intersected clean fill material from the former tank excavation. Borings a de <br /> AH-3, however removed approximately 6�1 yd3 of c ntaminated sail from a depth of 7 to <br /> nearly 12 feet below the surface. <br /> The borings were drilled using a truck mounted hydrodigger equipped with 10 and 30-inch <br /> diameter solid flyte augers. Holes AH-1, AH-2, and AH-3 were drilled using the 30-inch <br /> diameter auger. Borings AH-4 and AH-5 were drilled at the intersections of AH-1 and <br /> AH-3_, and AH-3 and AH-2 respectively with the 10-inch auger. <br /> The drilling and soil removal activities were performed under the supervision of a - <br /> California Registered Geologist who selected the boring locations and collected the <br /> verification sail samples. Approximately 75 cubic yards of soil contaminated with primarily <br /> oil and grease was removed for subsequent off-site disposal. <br /> , <br /> (916)635.0839 FAX(916)852-1411 <br /> ;I' [ 2252 Fort Point Drive,Gold River,CA 95670 <br />