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06/25/2001 14 49 2094671 AGE STOCKTON PAGE 04 <br /> 22 June 2001 <br /> AGE-NC Project No 97-0333 <br /> Page b of 10 <br /> approximately 1,900 feet northwest of the site (Sensitive ,Receptor Survey, dated 08 September <br /> 2000) To protect these wells and to comply with the RWQCB letter directive, dated 02 March 2001, <br /> AGE proposes to install,operate and maintain an interim ground water punap-and-treat remediation. <br /> System utilizing ground water extraction well EW-I with a dedicated low-flow ground water <br /> submersible pump The goals of this interim rernediation effort are <br /> • To inhibit migration of dissolved petroleum hydrocarbon-inipacted ground water off-site, <br /> • To decrease the dissolved petroleum hydrocarbon plume, <br /> • To provide some degree of immediate relief and protection for the endangered dnnk.>ug water <br /> wells, and <br /> • To protect the beneficial use ground water supply <br /> Based on conditions encountered dumg the ground water aquifer pumping test on 05 April 2001 <br /> (capture zone esiamated at 140 feet), a low-flow ground water pump-and-treat system appears to be <br /> an effective method for ground water interim remediation at this site <br /> Based on RWQCB and PHS-EHD letter directives to mstall and continuously operate a purnn-anrl- <br /> treat system in the area of the highest ground water MTBE contatnmation (Appendix A), AGE <br /> proposes to install a dedicated loin-flow ground water pump in EW-I and .initiate on-site mtenm <br /> remediation utilizing a pump-and-treat"technology Drilbng and interim remediation activities will <br /> consist of the follo-A.ng tasks <br /> Permitting and pie-field work activities, <br /> Dedicated ground water pump installation, <br /> • Pumping and teraporanly storing produced ground A ater, <br /> Properly disposing of pi oduced ground water, <br /> p Preparation of quarterly topoes <br /> 31 PERMI F1 LNU AND PRF,-FIELDS WORK ACTWITIES <br /> Applicable site peen is tilt be obtained fioin the city of Manteca(1 e discharge,budding , electrical, <br /> etc ) In addition, an update to the health and safety plan presently our-file will be prepared in <br /> accaidaiCL Occr.fpananol Safet; acrd ffealth Guidance Ylanual for Hazardous fflaste Site <br /> Acrivities (Naticindl Institute for Occupational Safrfy acid Health Adnirustxatlor, U S roast �uarcl <br /> anti t l uviinnrnputal Protection �'�gerim, 1985) Pnoi to mobilization all uridezground txenchin� <br /> 9dvanrtQl";eoFt� irprs.rigritgi ir <br />