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Date April 10, 2006 <br /> C A M B R I A Quarter 1" Quarter 2006 <br /> OLYMPIAN QUARTERLY GROUNDWATER MONITORING REPORT <br /> Fund Claim No 12820 Address 1022 Frontage Road, Ripon, Califoinia <br /> Consulting Co/Project Manager Cambria Environmental Technology Inc/Brandon Wilken <br /> Consulting Co Project No 165-1556 <br /> Primary Agency/Regulatory 1D No San Joaquin County Environmental Health Division/ <br /> Site Code 1604 <br /> WORK PERFORMED THIS QUARTER (FIRST - 2006) <br /> 1 Performed first quarter groundwater monitoring and sampling activtties on Marchi, 200 6-1 O <br /> 2 Submitted quarterly groundwater monitoring report for first quarter 2006 <br /> WORK PROPOSED FOR NEXT QUARTER (SECOND —2006) <br /> 1 Perform quarterly groundwater monitoring and sampling for second quarter 2006 <br /> 2 Prepare and submit quarterly groundwater monitoring report for second quarter 2006 <br /> 3 Prepare and submit a workplan proposing additional subsurface investigation activities <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 22 68 feet below ground surface <br /> Groundwater Flow Direction and <br /> Gradient Northwest, 0 0006 ft/ft <br /> DISCUSSION Z,oG <br /> Groundwater levels measured on March 9, 2005 indicate that groundwater beneath the site flows <br /> towards the northwest at a gradient of approximately 0 0006 ft/ft Groundwater flow direction <br /> has fluctuated since groundwater monitoring began in August 1999 Groundwater elevation <br /> contours are shown on Figure 2 <br /> Cambria directed groundwater sampling for monitoring wells MW-1 through MW-5, MW-9 and <br /> MW-10 and commercial supply well DW-1 Advanced G eoEnviron mental (AGE), of Stockton, <br /> California sampled and obtained analytical results for monitoring wells owned by Ripon Farm <br /> Service (RFS), MW-6, MW-7, MW-8, MW-9 and MW-10 Table 1 presents the analytical results <br /> and Appendix It includes analytical reports for wells sampled under Cambria direction <br /> H%Olympwn\22502 South Hwy 99 Ripon\QM\2006\1Q06\IQ 06 QMR doc i <br />