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r Geological Tecluricsl�rc. <br /> � Soil Investigation Report <br /> Page 3 <br /> r ; Project No. 1128.2 <br /> March 11,2004 <br /> • Semi-volatile Organic Compounds (VOCs)by EPA method 8270C <br /> A Chain of Custody was completed for all samples collected and tracked .to ensure sample <br /> integrity. The reporting limits for these compounds are listed below. <br /> eportingLimits: <br /> �i of (jig/kg) 5-100 _ <br /> i} <br /> The results of the soil samples taken at sampling points GP-1, GP-2, GP-3, GP-4, GP-5, GP_ <br /> 6, GP-7, GP-8, and GP-9 were non detect for all analyzed constituents. <br /> 2.2 Septic Tank Remediation <br /> I <br /> The following measures were taken to remove the thr.�eat the chemicals contained in these <br /> tanks that may pose a threat to the environment. !I <br /> 2.2.1 Septic Tank Cleanout <br /> Eco Services and Clean Harbor performed the work;;to remove the contaminated sewer <br /> water from the two septic tanks. The. contents of lithe two septic tanks were vacuum <br /> extracted from the tanks;the tanks were pressure washed so-that the walls and floor of the <br /> tanks could be investigated for cracks and holes. 1 <br /> �! iP <br /> 'i The contents of the tank and the wash washer were contained onsite in a Baker tank. <br /> 2.2.2 Onsite Treatment <br /> Eco Services treated the sewer water onsite in the 81aker Tank with chlorine to kill the <br /> bacteria. Once this was done, the water was pumped into a tanker truck for transportation to <br /> the disposal facility. See Appendix C for disposal manifest form. <br /> 2.2.3 Disposal Method <br /> The concentration of volatile organic compounds ar% semi-volatile organic compounds <br /> j dictated the disposal method that had to be used. Therefore, we based the decision of <br /> a disposal method on results of the sample collected in the Baker tank. This sample j <br /> represented the average concentration of these chemical compounds as present in all four <br /> I, chambers of the septic tanks. <br /> Once concentrations of bacteria were reduced to non detect levels by treatment, the disposal <br /> was performed by Eco Services and Clean Harbor. A Uniform Hazardous Waste Manifest <br /> was written to track the transportation and destination of the contaminated material. <br /> i <br />