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r <br /> © LUHCORFF (& CALMANINI GRCUNO-•NATER RESOURCES <br /> O N S U L T I N G E N G I N E E R S -•4"5i NMI NEDE OELOPMEN T•MANAGEMENT <br /> d�:Tf1 <br /> SERVICE <br /> 93 AUG 12 Aft 9* 32 <br /> August 10, 1993 r�I A'E D <br /> File No. 93-7-027 AUA 1 A 99 <br /> M EAJH <br /> ROW It"VICE5 <br /> Mr. Robert Evans <br /> State of California <br /> Regional Water Quality Control Board <br /> 3443 Routier Road <br /> Sacramento, California 95827-3098 <br /> SUBJECT: SMS BRINERS - MONITORING WELL # 1 REPLACEMENT <br /> Dear Mr. Evans: <br /> For operational and hydrogeologic reasons, Luhdorff and Scalmanini, Consulting Engineers <br /> (LSCE) have recommended replacement of Monitoring Well # 1 located at the SMS <br /> Briners facility. This site, as previously stated in several reports (including the Corrective <br /> Action Program; LSCE, September 1992), is 7-1/2 miles east of Stockton, California on <br /> Highway 4 in San Joaquin County. We plan to remove the existing 2-inch steel monitoring <br /> welt and replace it with a 6-inch PVC monitoring well. Profiles of the existing monitoring <br /> well and the proposed replacement monitoring well are attached The new monitoring well <br /> will be constructed in the same borehole created by removal of the original monitoring well. <br /> The new monitoring well will allow SMS Briners to install sampling equipment in this well <br /> similar to the equipment installed in other monitoring wells at the facility. The new PVC <br /> monitoring well will be less affected by seasonally high chloride concentrations which have <br /> been corrosive to the existing steel casing. The new monitoring well will also have a shorter <br /> gravel envelope. <br /> We are prepared to start work on this project, and the drilling contractor, Purviance <br /> Drillers, is currently attempting to take out a permit from the San Joaquin County <br /> Department of Environmental Health Services. The County has requested that you review <br /> the work description stated above and that we obtain your approval for this work before <br /> 500 First Street. Woodland. OA 95695 • 316.661 0109 • Fax 516.361 3z <br />