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Executive Summary <br /> This report presents the results and conclusions of a suhsurt-ice irtvesti :ti � <br /> former underground tank location, known as the East Miner Avenue prune_ <br /> at Dc;i lt4ante's Plant 33 in Blackfan. California• The ob�eclives al• the <br /> investigation <br /> nst <br /> were to. .. located <br /> Attempt to locate a buried diesel fuel tank identified on a 1983 plant <br /> map. <br /> Identify the lateral and vertical extent of soil contamination, if an <br /> vicinity of the diesel tank and a former Sot)- ,illon aselin ) to the <br /> 6 be tank. <br /> Evaluate the potential for groundwater <br /> site. contamination beneath each tank <br /> Recommend a plan for remedial action. if needed. <br /> The investigation occurred in the vicinity of a Farmer 5{10-gallon T <br /> suspected S00-gallon diesel tank. As discussed in S��ctk�n ' of this report, the gasoline <br /> tank was removed in I955, atm withgasoline trtnk and a <br /> The diesel tank was suspected to exist he c6 use of tscubic rincfusids of onsalnnC contamana ed so �l. <br /> As discussed in Section 3 of p <br /> r this report, the investigation 1;tticrn included thre.. <br /> major <br /> ' Aground-penetrating* <br /> 500-gallon <br /> d radar survey was conducted ft, !create the suspected <br /> gallon urderf round diesel tank. <br /> • A sailc <br /> vs <br /> g' UrN,ey was conducted inthe vicinity of the fcotmer gasoline <br /> _ tank. The purpose of the soil gas surey was to yuafitatively delineto <br /> the shallow vertical and lateral extent of contamination. <br /> Seven soil borings were drilled in the vicinity of the former gasoline tank <br /> and the suspected diose! tank. <br /> delineate the vertical and horizontal The purpose of the soil borings was to <br /> extent of contamination and improve <br /> the understanding of the local strati <br /> the borings were analyzed for benzente,l,toluene,y. cil Samil c <br /> ples <br /> ytfrom <br /> (BTEX), TPH-Gas, TPH-Diesel, and lead. <br /> - The-findings of-the investigations are -- - - -- <br /> summarized below, presented in Section 4 of this report and <br /> _ sfiost�s�rzt,w,tst <br /> i <br /> .r�r��.•.onarasura� l� .. <br />