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LI <br /> NNag 11, '1 0 m..,n w ° <br /> �! <br /> 0 <br /> IRA <br /> - I'M <br /> w <br /> - ; _2M <br /> .,.y <br /> -16MV14, MM OWN rl"M ��W' <br /> 3- <br /> i <br /> ��lr.+aatrssFAt?NT rtELATED TO <br /> .-�. � 111JnFP_ORrlllti�'I'�INKt; <br /> 692010".11 r_srtfr Wry,Stockton,Callfomla <br /> 1 <br /> Dolts Project No.40-98-588 <br /> Palo e <br /> A single soil sample taken from beneath the steel waste oil tank when it was removed in June of 1907 <br /> ff j_ was analyzed for TPH. BTEX, and polychlorinated biphenyl (PCB) by EPA Method 8080, and <br /> I halogenated volatile organics by EPA Method 8010. All of the test results were negative. Copies of <br /> certified laboratory results are contained in Appendix A. <br /> 2.3 SntlIUeak I-Tlstory <br /> No spills or leaks have been reported at this site. Precision tarok tests have been performed regularly <br /> over the years and no lraks have been detected. Copies of the latest results(from June 1988) are <br /> contained in Appendix B. The latest precision tests continue to indicate that the tanks are tight. <br /> 4 W�ILZoryrent <br /> { An inventory of existing water supply wells within a one <br /> mile radius of the site will be <br /> conducted if petroleum constituents are detected at higher than acceptable levels in soils underlying . <br /> the site. <br /> 2.3 _U�ier¢reund U1111tie� <br /> All underground utility locations will be verified with respective utility companies prior to drilling <br /> l of soil borings at the site. <br /> (� �0 PROPOSEI>SO[L BORINGS <br /> This section describes the proposed assessment, including the depth and distribution of exploratory <br /> i <br /> soil boAngs. The methods used to drill and sample the borings,the analytical procedures,the quality <br /> assurance plan,and the site safely plan are contained in Appendix C. <br /> i <br /> 3.1 Exploratory Bprings <br /> Four soil borings wi:1 be advanced adjacent to the existing tank location(Figure 3). One soil boring ; <br /> will be advanced adjacent to product-distribution lines. The other twc borings are located within <br /> the area to be excavated to install new underground storage tanks. <br /> Borings will be advanced using a 7.5- to 8-inch diameter hollow-stem auger. Samples will be <br /> collected in a California-modified split-barrel sampler. Appendix C, Section 1.1 describes the <br /> drilling and sampling techniques to be used. <br /> I <br /> 1 <br /> I <br /> f <br />