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Phase 11 Environmental Site Assessment Report Page 5 <br />WESTLAKE SUBDIVISION VILLAGE E, G, H, I AND J <br />Regatta Lane <br />Stockton, California <br />WKA No. 13221.02 <br />July 27, 2021 <br />not exceed the reported background arsenic concentrations that range between 7.1 and 10.8 <br />milligrams per kilogram (mg/kg). <br />The results presented in this report demonstrate that none of the RECs listed below have been <br />validated by the data presented in this report. <br />• The potential presence of OCPs and total arsenic in soil that was excavated to <br />construct the lake and that was placed as fill over the remaining portion of the Site. <br />• The potential presence of OCPs and total arsenic in soil that is stockpiled at locations <br />within the Site. <br />• The potential presence of OCPs and total arsenic in soil that was covered by the <br />approximately 2'/2 feet thickness of soil that was placed as fill over the Site. <br />6.0 RECOMMENDATIONS <br />WKA has concluded that there are no remaining Recognized Environmental Conditions and <br />recommends that no further study of this Site be conducted. WKA should be immediately <br />notified of any future discovery of conditions that were not understood at the time WKA <br />conducted this study. <br />San Joaquin County has requested to receive a copy of this report as a condition of the Boring <br />permits issued for this project. WKA recommends that Lennar provide a copy of this report <br />to San Joaquin County in order that WKA can comply with the San Joaquin County Soil <br />Boring Permit requirements for this project. The San Joaquin County address and contact <br />person are listed below. <br />San Joaquin County Environmental Health Department <br />1868 E. Hazelton Avenue <br />Stockton, CA 95205 <br />Attention Mr. Jeffrey Wong <br />Phone 209 468-0335 <br />NM <br />