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n IEmeon AssZoates <br /> 1433 North Market Boulevard • Sacramento , California 95834- 1943 • (916) 928-3300 • Fax (916) 928-3341 <br /> December 1 , 1994 <br /> Project 2520- 100.01 <br /> Ms. Margaret Lagorio <br /> San Joaquin County <br /> Public Health Services <br /> Environmental Health Division <br /> P.O . Box 388 <br /> Stockton, California 95201 - 388 <br /> Re : Well Installation Permits for Frank's Exxon No . 4, 14800 West Frontage Road, Manteca, <br /> California <br /> Dear Ms. Lagorio : <br /> This letter is being written to forward application permits for the installation of two groundwater <br /> reinjection wells at the Frank ' s Exxon No . 4 facility located at 14800 West Frontage Road, <br /> Manteca, California (see Figure 1 ) . Included with the permits is a check in the amount of $ 89 to <br /> cover the well application permit fee. <br /> EMCON Associates (EMCON) is planning to install two approximately 43 - foot-deep , 4-inch- <br /> diameter groundwater reinjection wells to be utilized as part of a soil and groundwater <br /> remediation system being constructed at the site. Construction of the reinjection system has been <br /> approved by the California Regional Water Quality Control Board , Central Valley Region , by the <br /> issuance of a General Order for Land Disposal of Ground Water from Cleanup of Petroleum <br /> Fuel Pollution (Order No. 91 -25013) , dated October 20, 1994. <br /> EMCON proposes drilling two soil borings and converting the borings to groundwater reinjection <br /> wells (RW- 1 and RW-2) at the locations shown on Figure 2. Drilling will be conducted using 10- <br /> or 12-inch-diameter hollow-stem auger drilling equipment. A detailed log will be kept for the <br /> exploratory borings based on auger-return material and soil samples. <br /> The proposed soil borings will be drilled to a depth of approximately 43 feet and converted to <br /> groundwater reinjection wells by installing 2- inch-diameter, flush-threaded, polyvinyl chloride well <br /> casing and 30 feet of 0.020-inch machine-slotted screen . General boring and monitoring well <br /> installation procedures are described in Attachment A . <br /> SAC/PJZN2520N25201000. 1 FM-94/PAS : I <br />