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1 � • <br /> 1 11 March 2002 <br /> AGE-NC Project No 95-0130 <br /> 1 Page 7 of 13 <br /> 1to 20 feet south of MW-1 and screened between 35 and 55 feet bsg, <br /> One 2-Inch diameter ground water monitoring well (MW-9) located approximately 80 <br /> to 100 feet northwest of MW-1 and screened between 35 and 55 feet bsg, <br /> 1 One 2-Inch diameter multi-level ground water monitoring well (MW-10) located <br /> approximately 140 to 160 feet north-northeast of MW-5 and screen Intervals at depths <br /> 1 between 35 and 45 feet bsg(A),50 and 55 feet bsg(B), 70 and 75 feet bsg(C), 100 and 110 <br /> feet bsg (D) and between 125 and 142 feet bsg (E), <br /> 1 One 2-Inch diameter multi-level ground water monitoring well (MW-11) located <br /> approximately 130 to 150 feet northeast of MW-3 and screen Intervals at depths between <br /> 35 and 45 feet bsg(A), 50 and 55 feet bsg (B), 70 and 75 feet bsg (C), 100 and 110 feet bsg <br />' (D) and between 125 and 145 feet bsg (E), <br /> • One 2-Inch diameter multi-level ground water monitoring well (MW-12) located <br /> approximately 70 to 90 feet east of MW-3 and screen intervals at depths between 35 and <br />' 45 feet bsg(A), 50 and 55 feet bsg(B), 70 and 75 feet bsg(C), 100 and 110 feet bsg(D)and <br /> between 125 and 142 feet bsg (E), and <br />�• a One 2-Inch diameter multi-level ground water monitoring well (MW-13) located <br /> approximately 90 to 110 feet southeast of MW-6 and screen Intervals at depths between <br /> 35 and 45 feet bsg(A), 50 and 55 feet bsg(B), 70 and 75 feet bsg(C), 100 and 110 feet bsg <br />' (D) and between 125 and 142 feet bsg (E) <br />■ <br /> Proposed well locations are depicted in Figure 2, general soil distribution beneath the site is <br /> depicted in cross sectional views B-B'in Figures 3 AGE has developed a preliminary subsurface <br /> model of the site soil stratigraphy comprised of a vadose (unsaturated) zone and four hydrological <br /> units (Multi-Level Monitoring Well Installation Report, dated 01 March 2002) The proposed <br /> ground water extraction, SVE and IAS wells will be screened through Vadose Zone and <br /> Hydrologic Unit No 1 (HU1) and in areas of known petroleum-impacted soil and ground <br /> I water The proposed groundwater monitoring wells MW-8 and MW-9 will be screened through <br /> HU1 ground water and to delineate the southwest and northwest extent of petroleum-Impacted <br /> ground water The proposed ground water monitoring wells MW-10, MW-11, MW-12 and <br /> MW-13 will be screened to delineate the vertical and later extent of off-site petroleum-impacted <br /> ground water Procedures for well installation are presented in Section 4 2 <br /> Following well installation, each water well will be developed to maximize water flow Into the <br /> well and minimize the amount of fine-grained sediment drawn into the well during pumping <br /> or balling Procedures for well installation and development are presented in Sections 4 2 and <br /> 4 3, respectively <br /> I <br /> Advanced GeoEnvironmental,Inc <br />