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• 0 <br /> C A M B R I A r �',_ ' E'F';�{j 711 <br /> 01 JAL 23 - <br /> � ��. 56 July 17, 2001 <br /> Mr Jeffrey Wong <br /> San Joaquin County Public Health Services <br /> Environmental Health Division <br /> 304 East Weber Avenue, Third Floor <br /> Stockton, California 95202 <br /> Re Groundwater Monitoring Report— Second Quarter 2001 <br /> Former Shell Service Station <br /> 8$0 Victor Road <br /> Lodi, California <br /> SAP Code 135446 <br /> Incident No 98995526 <br /> SJCPHS/EHD Site Code 1746 <br /> Dear Mr Wong <br /> Cambria Environmental Technology, Inc (Cambria) prepared this report on behalf of Equiva <br /> Services LLC (Equiva) in accordance with quarterly reporting guidelines issued by the Central <br /> Valley Regional Water Quality Control Board and San Joaquin County Public Health Services, <br /> • Environmental Health Division (SJCPHS/EHD) <br /> SECOND QUARTER 2001 ACTIVITIES <br /> Blaine Tech Services, Inc (Blaine) of San Jose, California gauged and sampled all site wells and <br /> prepared a summary table of field gauging data and gasoline constituents (Appendix A) <br /> Cambria compiled the oxygenate and lead scavenger data (Table 1), prepared a site vicinity map <br /> (Figure 1), and prepared a groundwater contour/chemical concentration map (Figure 2) Blaine's <br /> report, presenting the laboratory report, is included as Appendix A <br /> ANTICIPATED THIRD QUARTER 2001 ACTIVITES <br /> Blaine will gauge and sample the site wells according to the existing sampling schedule and <br /> tabulate the data Cambria will prepare a groundwater monitoring report <br /> Oakland CA <br /> San Ramon, CA <br /> Sonoma, CA CONCLUSIONS AND RECOMMENDATIONS <br /> Cambria <br /> Groundwater flow direction this quarter is southeasterly Past monitoring events indicate that the <br /> Environmental <br /> Technology,Inc groundwater gradient is very flat and flow direction fluctuates beneath the site Methyl tertiary <br /> butyl ether concentrations in wells MW-1 and MW-3 this quarter are generally consistent with <br /> oerknisStreet <br /> P D Box 259 historical data, ranging from 2,700 to 16,000 parts per billion (ppb) Tertiary butanol and <br /> Sonoma,CA 95476 <br /> Tel(707)935-4850 <br /> Fax(707)935-6649 <br />