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' sampling event. As describe <br /> range h LFR Inc. <br /> hydrocarbons din Section 4. <br /> 2006 is qualified detected in the sample 0 °f this reportthe <br /> as estimated due to mple collected fro result for in oil- <br /> ' a nonco RPD value. W-8 during June 23, <br /> Metals mplJant value. <br /> ' During the June 23 <br /> above the laboratory 2006 groundwater <br /> (0.057 g ) MW 5 0P°rung limit in the grOun event, only barium was detected <br /> m /I , <br />' (0-037 mg/1), MW-7 (0.03, ater amples nd MW-gle 061 from <br /> MW-1 <br /> 6.0 CONCLUSIONS mg/1). <br />' AND RECOMMENDATIONS <br /> Pyrolytic oil encountered in soil during excavation activities in <br /> corner of the Site during July 2005 has affected groundwater <br /> collected to date. To assess the north-northwestern <br /> installed approximately 200 feet downg adie"It of nt from quality based on <br /> the Site and well groundwater, well A4W_8 wa's data <br /> MW-9 was installed (during the "Orth-northwestern northwestern corner of <br /> approximately 450 feet downgradient fro g the Week of Jul <br /> m the north-nor Y IQ 2006) <br /> Based on the groundwater thwestern corner of the Site. <br /> from wells g undwater analytical results for the samples <br /> MW-1, MW_5, MW-7, ples collected <br /> duri <br /> and ng June 2006 <br /> motor oil-range hydrocarbons in d 14W-8, the concentrations of Bete ted diesel- <br /> compared to recent results from the the <br /> samples fluc <br /> motor oil-range hydrocarbonm the same wells These fluctuations of di slightly <br /> and/ r concentrations are likely due to dies and <br /> the groundwater table and/or advection andseasonal fluctuation of <br /> hydrocarbons within the shallow groundwater. Report dispersion of <br /> groundwater samples dissolved petroleum <br /> ples were below the respective maximum concentrations of VOCs in the <br /> However, the groundwater cleanupP maxim <br /> goal for TP urn contaminant levels (MCLs). <br /> exceeded in the groundwater s Hd and TPHmo (100 / <br /> (1,100 11g/1 amples collected fro fig 1) van <br /> m well MW-7 (I50 dig/1) and MW-8 <br /> Based on the laboratory analytical results, additional <br /> MW'-5, and MW-7 through MW_8 is recommended monitoring <br /> of Pyrolytic oil-affected mmended to g °f the <br /> he wells MW 1, <br /> iPoundwater. further assess the latera] extent <br /> LIMITATIONS <br /> The opinions and recommendations presented in this report are based upon the scope of <br /> services, information obtained through the performance of the services, <br /> schedule as agreed upon by LFR and the CIWMB. This report is <br /> professional service and the <br /> standards and was Prepared in accord P an instrument of <br /> and level of skill and care accordance with the general] <br /> established by the environmentalunder similar conditions Y accepted <br /> consulting industrand circumstances <br /> guarantee, is or implied, is intended or given. To the the extent that LF or <br /> R relied <br /> Final GW Mon Rpt June 2006.docLFR <br /> Page 7 <br />