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Linda Thompson <br /> Project <br /> Coordinator <br /> PO-3038 <br /> 7131293-2867 <br /> Remediation Technology Conoco Inc <br /> Fax 7131293 3305 P O Box 4784 <br /> Houston, TX 77210-4784 <br /> August 9, 1993 <br /> Mr Harlin Knoll REGEVE ' <br /> San Joaquin County PHS/EHD AU 9 13 4993 <br /> P o Box 2009 ENVIR9NMENTAL HgA6TH <br /> Stockton, California 95201 PERMIUSERVICES <br /> RE: Quarterly Groundwater Monitoring Report, 2nd 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 second quarter 1993 groundwater <br /> monitoring report for the Stockton site In general, groundwater levels at the subject site <br /> have risen approximately 4 2 feet since the last quarterly sampling event All sampled wells <br /> were non-detect for TPHg and BTEX <br /> Monitoring well MW-28 has been non-detect since installation in 1991 Therefore, I request <br /> authorization to reduce the sampling frequency for this well from quarterly to annually <br /> If you have any questions, please contact me at (713) 293-2867 <br /> i <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 /> low <br />