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r � <br /> L, <br /> J {� <br /> t <br /> u� � <br /> � THRIFTY C3IL 1=C3 . <br /> July 19, 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 Qil Co. Station #171 <br /> ARCO Products Company Station #9600 <br /> 1250 North Wilson Way <br /> Stockton, CA 95205 <br /> .2nd Quarter 2001, Status Report <br /> Dear Mr Infiirna <br /> Presented herein is the Second Quarter 2001, Status Report prepared for former Thrifty Oil Co <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 Second 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 39 61 <br /> feet below ground surface(bsg)in monitoring well MW-5 to 42 17 feet bgs in monitoring well TB-8 <br /> (Appendix A) A groundwater elevation contour map based upon May 15, 2001 data is presented <br /> as Figure 1, and it appears that a groundwater trough is located in the center of the site in the area <br /> of wells MW-4 and TB-8 <br /> Quarterly Groundwater Sampling <br /> As part of the groundwater monitoring program, groundwater samples were obtained from <br /> Q® <br /> 13539 F Foster Road, Santa Fe Springs, CA 90670-0138 • (562) 923-9876 <br />