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Mr. Joel Weiss • • <br /> January 24, 1997 <br /> Page 2 <br /> Upgradient well MW-12 will also be sampled to evaluate background water quality. Table 1 <br /> outlines this approach. <br /> Table 1. Well Activity <br /> Well Designation Location Anticipated Activity <br /> MW-1/KJC downgradient monitor water levels <br /> MW-1 park area separate-phase oil removal <br /> MW-2 upgradient/cross-gradient monitor water levels <br /> MW-3 park area separate-phase oil removal <br /> MW4 downgradient/cross-gradient monitor water levels and sample <br /> MW-5 downgradient monitor water levels and sample <br /> MW-6 upgradient separate-phase oil removal <br /> MW-7 downgradient monitor water levels <br /> MW-8 downgradient monitor water levels <br /> MW-9 downgradient monitor water levels and sample <br /> MW-10 downgradient monitor water levels and sample <br /> MW-11 upgradient/cross-gradient monitor water levels <br /> MW-12 upgradient monitor water levels and sample <br /> MW-13 upgradient/cross-gradient monitor water levels <br /> MW-14 upgradient/cross-gradient monitor water levels <br /> MW-15 park area separate-phase oil removal <br /> MW-16 park area separate-phase oil removal <br /> MW-17 upgradient monitor water levels <br /> MW-18 cross-gradient separate-phase oil removal <br /> MW-19 downgradient separate-phase oil removal <br /> MW-20 park area separate-phase oil removal <br /> MW-21 park area separate-phase oil removal <br /> Table 2 outlines the analytical suite proposed for groundwater samples submitted for <br /> laboratory analysis; these analyses are consistent with the "Technical Approach". <br /> Table 2. Laboratory Methods <br /> Constituents EPA Preparation and Maximum Detection Sampling Frequency <br /> Analytical Methods Limit (µg/1) <br /> Benzene 5030/8020 0.5 Quarterly <br /> Toluene 5030/8020 0.5 Quarterly <br /> Ethylbenzene 5030/8020 0.5 Quarterly <br /> Xylene 5030/8020 0.6 Quarterly <br /> TPPHt as Gasoline (C4-C12) 5030/8015M 50 Quarterly <br /> TEPH2 as Diesel (CIO -C24) 3510/363OB-8015M 50 Quarterly <br /> Polynuclear Aromatic 8310/82703 various Quarterly <br /> Hydrocarbons <br /> 1.Total Purgable Petroleum Hydrocarbons <br /> 2.Total Extractable Petroleum Hydrocarbons <br /> 3.Method 8270 may be utilized if samples exhibit the potential for matrix interferences. <br />