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Linda S Thompson <br /> Project Coordinator � �® <br /> PO 3038 <br /> 713/293-2887 q <br /> i�� <br /> Remediation Technology Conoco Inc ,- ,� , , t, '7i' <br /> Fax 713/293-3305 P 0 Box 4794! <br /> Houston, TX 77210-4784 I. <br /> I- <br /> t <br /> October 22, 1993 <br /> Mr Harlan Knoll <br /> San Joaquin County PHS/EHD <br /> P O Box 2009 <br /> Stockton, California 95201 <br /> RE: Quarterly Groundwater Monitoring Report, 3rd Quarter 1993 <br /> Former Econo Gas Station <br /> 4325 East Washington Street <br /> Stockton, California <br /> Dear Mr. Knoll <br /> Please find enclosed for your review a copy of the Quarterly Groundwater Monitoring <br /> Report, 3rd Quarter 1993 for the Stockton site In general, groundwater levels at this site <br /> have risen approximately 0 4 feet since the last quarterly sampling event All sampled wells <br /> were non-detect for TPHg and BTEX <br /> Please review Table B- Summary of Groundwater Analytical Results Based on the high <br /> frequency of non-detect results, I request authorization to reduce the sampling frequency of <br /> these wells from quarterly to annually Please call me at your earliest convenience to <br /> discuss this request <br /> If you have any questions, please contact me at (713) 293-2867 <br /> Sincerely, <br /> Linda S Thompson <br /> Project Coordinator <br /> enc <br /> cc w/enc Ms Beth Thayer <br /> California Regional Water Quality Control Board <br /> Central Valley Region <br /> 3443 Routier Road, Suite A <br /> Sacramento, California 95827-3098 <br /> �v✓ <br />