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certified facility, performed the analyses. The analytical <br /> results are summarized in Table 1. Laboratory data sheets <br /> and chain-of-custody documentation are included in Appendix <br /> III. <br /> Soil boring MW-1 was converted to a groundwater monitoring <br /> well. On January 30, 1990, the well was monitored and <br /> developed in accordance with WaterWork's well monitoring and <br /> development protocols (Appendix III) . A water sample was <br /> collected the same day in accordance with WaterWork' s <br /> Groundwater Sampling Protocol, (Appendix III) . The sample <br /> was analyzed by B.C. Laboratories for BTX and TPH as diesel <br /> by EPA 8020 and DOHS methods, respectively. Analytical <br /> results are summarized in Table 2. Laboratory data sheets <br /> and chain-of-custody documentation are included in Appendix <br /> TII. <br /> 3.2 Subsurface Conditions <br /> kSoils beneath the project site consist primarily of lean <br /> clay and silt to 19.5 feet below grade, the maximum depth <br /> .�, explored. No evidence of hydrocarbon odoxs or •sail= <br /> d :eoolratiolrx teas acted':indri11 cuttn�s:' }tl :' <br /> barixus. Laboratory analysis of the soil samples indicates <br /> .� that petroleum hydrocarbons are not preseht 'db&iv *,M:L1�u : <br /> reporting requ3r•.ement$� <br /> i <br /> 3.3 Groundwater Conditions <br /> Groundwater. was encountered in the boreholes at depths <br /> ranging; f`'tbm .7 to 9 feet below rade: Laboratory I 9 results <br /> for the water sample collected from monitoring well MW-1 do <br /> not record BTX constituents above minimum reporting levels. <br /> However total petroleum hydrocarbons as diesel are present <br /> at a concentration of 150 parts per billion. <br /> 4.0 CONCLUSIONS AND RECOMMENDATIONS <br /> Based on the absence of petroleum hydrocarbons in the soil <br /> samples collected from the project site, no evidence of <br /> significant soil contamination exists outside of the area <br /> near the former tank pit. Therefore, WaterWork recommends <br /> excavation of the contaminated soil and removal to a Class <br /> II landfill. We further recommend quarterlysampling P g of <br /> monitoring well MW-1 for a period of one year. <br /> it <br /> Is <br /> k*.. 3 <br /> i <br />