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y <br /> KLEINFELDER <br /> 5 RECOMMENDATIONS <br /> The lateral extent of shallow soil contamination appear to be Iirrlted within approximately <br /> 20 feet of the excavation,but it appears that there may be lateral migration of petroleum <br /> hydrocarbon.-at o7 near the ground water surface. Kleinfelder recommends that Nomellini <br /> Construction proceed with an assessment of the ground water in the vicinity of the, <br /> backfilled excavation. A minimum of three ground water monitoring vrelis should be <br /> installed to collect water samples for analysis and estimate the Jccai direction of ground <br /> water flow. Based or,the results of the preliminary wells, the necessity for additional wells <br /> or ground water remediation can be assessed. r <br /> Soil 2 to 3 feet above the ground water surface appears to be contaminated in the vicinity <br /> Of the excavations. The impact of this soil on the ground water and the need to remediate <br /> this soil can be further evaluated as the results of the preliminary ground water assessment <br /> ha-re been completed. <br /> The soil cutting stockpiled onsite should be considered contaminated based on the results <br /> of this investigation. The cutting can be T,.-mediated by one of the following actions: <br /> a Transport and dispose.of the soil at ar appropriate disposal facility. <br /> o Retain the soil onsite for potential future onsite treatment. <br /> A copy of this report shenid be submitted to the SJLHD for their review and consideration. <br /> F <br /> 188.89-960 g <br /> 3 <br />