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1 <br /> The soil remaining in the excavation pit after the tank removal showed signs of heavy staining <br /> under both the tank and associated piping PID readings exceeding 500 ppm were recorded after the <br /> removal of the tank and backfill material No ground water was present in the pit during UST <br /> excavation and backfilling <br /> Integrity testing of the two adjacent 4,000 gallon USTs (81713-1, 81713-3) was performed in <br /> ' conjunction with the closure of UST 81713-2 Both tanks passed criteria set forth in National Fire <br /> Protection Association (NFPA) for precision leak testing and remain in use (PRC, 1992b) <br /> 3.0 SAMPLING AND ANALYSIS PLAN <br /> 1 <br /> Section 3 1 describes the proposed sampling, including the number and location of samples <br /> ' and the rationale for sample locations Section 3 2 presents the analytical methods to be used for <br /> sample analysis, and Section 3 3 presents a complete description of the field methods and sample <br /> management procedures to be used during the field sampling activities Because the SAP is presented <br /> as part of the overall detailed FWP, reference is made in the SAP to other sections of the FWP to <br /> avoid repetition of information <br /> ' 3.1 SAMPLING STRATEGY AND RATIONALE <br /> In the first phase of the investigation, screening level sampling and analysis of soil gas and <br /> ' ground water using Geoprobe sampling equipment or equivalent is proposed Using information <br /> gathered during the initial phase, the second phase of the investigation will consist of soil borings and <br /> ' ground-water monitoring well installation to characterize site contaminant distribution Location of <br /> ground-water monitoring wells will be based on results of the first phase field screening Chemical <br /> ' analysis of soil and ground-water samples will be used to assess site contamination and direct future <br /> efforts at site characterization and remediation The sampling rationale is presented below <br /> 1 <br /> SAMM"162 !1 <br /> 044-0162UrATRI-0Si06M2 9 <br />