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� y <br /> 83 WEST MARCH LANE <br /> SUITE 12 July 19, 1990 STOCKTON,CA 95207 <br /> sM PHONE:(209)476-1635 <br /> MANAGERS DE5IGIULTANTS <br /> nECEAVED <br /> Mr. Greg Lyone 1 U L 2 3 1990 <br /> Department of Environmental Health <br /> San Joaquin County ENVIRONMENTAL HEALTH <br /> P.O. Box 2009 PERMIT/SERVICES <br /> Stockton, CA 95201 <br /> Dear Mr. Lyon, <br /> As a follow-up to your request for a well log of the monitor well <br /> installed at the former Laura Scudder's property located at 100 W. <br /> Valpico Road in Tracy, California, please find attached a boring <br /> log labeled "Boring T-1. " <br /> This log, originally presented in WESTON's report entitled <br /> "Groundwater Investigation Work Plan, Tank T-2 Area" dated March <br /> 13, 1990, describes the lithology from a boring located approxi- <br /> mately five feet from the installation of the monitor well. <br /> Because this information was available, WESTON did not lithologi- <br /> cally log during the installation of the well due to a desire to <br /> avoid redundancy of effort. However, as an extra check on the <br /> appropriateness of this decision, I have talked with Rob Sengebush, <br /> our registered geologist, who .supervised the well installation. He <br /> had reviewed the lithology of boring T-1 in comparison to the <br /> conditions found during the well installation and could discern no <br /> difference. Hence, WESTON is confident the boring log for Boring <br /> T-1 is representative of the lithology through which the well was <br /> eventually constructed. <br /> I trust that you will find that this log, along with Figure A-2 <br /> from Appendix A of WESTON's recent "Groundwater Investigation <br /> Report" for the Tank T-2 'area (also attached) will provide a <br /> complete package of information fbr your review. <br /> Should you have any further questions, please do not hesitate to <br /> call me. <br /> Sincerely, <br /> ROY F. WESTON, INC. <br /> Paul V. Sundberg <br /> Project Director <br /> PVS/cmc <br /> Attachment <br /> cc. Carl Navarra - Tracy <br />