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r , <br /> THRIFTY C31 L. MC] . <br /> October 29, 2001 <br /> Mr Michael J Infurna Jr <br /> Senior REHS <br /> County of San Joaquin <br /> Site Mitigation Unit IV/LOP <br /> 304 East Weber St , Fifth Floor <br /> Stockton, CA 95202 <br /> RE Former Thrifty Oil Co. Station #171 <br /> ARCO Products Company Station #9600 <br /> 1250 North Wilson Way <br /> Stockton, CA 95205 <br /> 3rd Quarter 2001, Status Report <br /> Dear Mr Infurna <br /> Presented herein is the Third Quarter 2001, Status Report prepared for former Thrifty Oil Co <br /> I <br /> (Thrifty) Station#171 at 1250 Wilson Way, Stockton, California(Figure 1) Presented in this report <br /> are the results of the site monitoring and remedial efforts conducted during the Third Quarter 2001 <br /> Thrifty has retained the services of Earth Management Company (EMC) to conduct quarterly <br /> monitoring and sampling activities at this site <br /> Groundwater Monitoring <br /> Depth to groundwater is measured in each monitoring well on a quarterly basis In general, <br /> groundwater occurs under water table conditions beneath the station at depths ranging from 40 69 <br /> feet below ground surface(bsg) in monitoring well MW-5 to 45 05 feet bgs in monitoring well MW- <br /> 6 (Appendix A) A groundwater elevation contour map based upon August 15, 2001 data is <br /> presented as Figure 1,and it appears that groundwater flows radially away from a mound located <br /> in the center of the site in the area of wells MW-5 and TB-7 <br /> Quarterly Groundwater Sampling <br /> As part of the groundwater monitoring program, groundwater samples were obtained from <br /> Q® <br /> 13539 E Foster Road, Santa Fe Springs, CA 90670-0138 • (562) 923-9876 <br />