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C A M B R I A Date December 30, 2005 <br /> • Quarter 4h Quarter 2005 <br /> OLYMPIAN QUARTERLY GROUNDWATER MONITORING REPORT <br /> Fund Claim No 12820 Address 1022 Frontage Road, Ripon, California <br /> Consulting Co/Project Manager Cambria Environmental Technology Inc Brandon Wilken <br /> Consulting Co Project No 165-1556 <br /> Primary Agency/Regulatory ID No San Joaquin County Environmental Health Division/ <br /> Site Code 1604 <br /> WORK PERFORMED THIS QUARTER (FOURTH - 2005) <br /> 1 Performed fourth quarter groundwater monitoring and sampling activities on November 15,2005 <br /> 2 Submitted quarterly groundwater monitoring report for fourth quarter 2005 <br /> 3 Prepared and submitted the site assessment and feasibility test reports <br /> WORK PROPOSED FOR NEXT QUARTER (FIRST— 2006): <br /> 1 Perform quarterly groundwater monitoring and sampling for first quarter 2006 <br /> 2 Prepare and submit quarterly groundwater monitoring report for first quarter 2006 <br /> QUARTERLY MONITORING: <br /> • Current Phase of Project Monitoring and assessment <br /> Frequency of Groundwater Monitoring Quarterly _ <br /> Is Free Product (FP) Present on Site No <br /> Current Remediation Techniques Natural Attenuation <br /> Average Depth to Groundwater 23 89 feet below ground surface <br /> Groundwater Flow Direction and <br /> Gradient Northeast, 0 0015 ft/ft and southwest, 0 009 ft/ft o <br /> DISCUSSION: <br /> Groundwater levels measured on November 15, 2005 indicate that groundwater beneath the site <br /> flows towards the former fuel underground storage tanks (USTs) from two opposite directions, <br /> northeast and southwest, at gradients of approximately 0 0015 ft/ft and 0 009 ft/ft, respectively { <br /> Groundwater flow direction has fluctuated since groundwater monitoring began in August 1999 'R S g <br /> rr„ <br /> Groundwater elevation contours are shown on Figure 2 <br /> Cambria directed groundwater sampling for monitoring wells MW-1, MW-9 and MW-10 and <br /> commercial supply well DW-1 Advanced GeoEnviron mental (AGE), Stockton, California <br /> sampled and obtained analtytic results for monitoring wells owned by Ripon Farm Service (RFS) <br /> MW-6, MW-7, MW-8, MW-9 and MW-10 Table 1 presents the analytical results and Appendix <br /> H IOlympian122502 South Hwy 99 Repon\QM\4Q0514Q 05 QMR doc 1 <br />