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Page 5 <br /> September 10,2012 <br /> DBrusca Project No. 114-001.01 1813 Moffat Boulevard Property,Manteca <br /> As shown on Table I and the attached laboratory report, the soil samples contained some of the <br /> tested metals at concentrations above the laboratory reporting limits. However, the detected <br /> metals concentrations are very low and within typical background (naturally-occurring) ranges <br /> for soils in the region. We compared the metals concentrations detected in the soil samples to <br /> ESL values, as well as to as well as California Human Health Screening Levels (CHHSLs) <br /> developed by the California Environmental Protection Agency.3 The CHHSL values were <br /> established by California EPA Office of Environmental Health Hazard Assessment (OEHHA) <br /> considering human health exposure scenarios. The ESL and CHHSL values for the tested metals <br /> are shown on Table II, along with the soil analytical data from the site. As shown, none of the <br /> metals concentrations detected in the soil samples from the site exceeds the agency screening <br /> values. <br /> SUMMARY AND CONCLUSIONS <br /> As described herein, we collected a number of subsurface soil samples from the vicinities of the <br /> waste water sump and the on-site septic disposal system for laboratory analysis to evaluate <br /> whether past use of these features resulted in significant discharges of hazardous substances to <br /> the subsurface. Neither the laboratory results nor our observations during drilling and sampling <br /> indicate significant subsurface contamination conditions beneath these areas of the site. <br /> Considering the results of this Phase II investigation, as well as the results of the referenced <br /> Phase I study, further environmental assessment of the property is not considered warranted at <br /> this time. <br /> If you have any questions or require additional information, please contact the undersigned at <br /> (916) 677-1470. <br /> Sincerely, <br /> BRUSCA ASSOCIATES,INC. <br /> /" F � <br /> jo Brusca <br /> 'Pri cipal Engineering Geologist <br /> ified Engineering Geologist No. 1948 <br /> JB.jb <br /> Attachments: Plate 1, Vicinity Map <br /> Plate 2,Plot Plan <br /> Plate 3,Sampling Locations <br /> Table I—Summary of Soil Analytical Data <br /> Laboratory Report and Chain-of-Custody Documentation <br /> San Joaquin County Drilling Permit <br /> 3 California Environmental Protection Agency;"Use of Human Health Screening Levels(CHHSLs)in Evaluation of <br /> Contaminated Properties";January 2005. <br />