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Q3/16/2001 11: 33 2094670 AGE STOCKTON • PAGE 09 <br /> 12 March 2001 <br /> AGE-NC Project No. 97-0333 <br /> Page 6 of 8 <br /> evaluate a general zone of capture(radius of influence) achievable during ground water extraction <br /> at the site.The proposed aquifer pump tests will be designed to obtain general aquifer characteristics <br /> such as hydraulic conductivity,storativity,transmissivity,draw-down at a constant pumping rate and <br /> radius of influence. <br /> 3.4. REPORT PREPARATION <br /> Results of the aquifer pump test will be presented in a report of findings;based on the results of the <br /> aquifer pump test,a ground water interim remediation system will be designed and proposed to the <br /> PHS-EV D/RWQCB for the site.The report of findings will be in a format acceptable to the RWQCB <br /> (Appendix A guidelines), and will be reviewed and signed by a California Registered Geologist. <br /> 4.0. FIELD PROCEDURES <br /> All field procedures will be overseen by an AGE representative under the supervision of a California <br /> Registered Geologist. Procedures for well installations, well development and aquifer pump test <br /> procedures are described below. <br /> 4.1. DRILLING <br /> A soil boring for installation of a ground water extraction well will be advanced at the site to a depth <br /> of 35 feet bsg utilizing a truck-mounted, hollow-stem drill rig and 15-inch diameter hollow-stem <br /> augers; a second soil boring for installation of a ground water observation well will be advanced at <br /> the site to a depth of 35 feet bsg utilizing 8-inch diameter hollow-stem augers. Soil cuttings and <br /> rinseate generated during drilling activities will be containerized in properly labeled DOT-approved <br /> 55-gallon drums, and stored on-site in an area lacking public access. Disposal alternatives for <br /> rinseate and stockpiled soil will be selected based on results of a laboratory analysis. <br /> 4.2. WELL COMPLETION <br /> The ground water extraction boring will be single-completed utilizing 6-inch diameter schedule 40 <br /> polyvinylchloride(PVC)well casing with 20 feet of 0.030-inch slotted well screen; the observation <br /> well boring will be single-completed utilizing 2-inch diameter schedule 40 PVC well casing with <br /> 20 feet of 0.020-inch slotted well screen. The proposed well construction diagrams are depicted in <br /> Figures 5 and 6. <br /> Advanced GwEavlronmenta4 Inc. <br />