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3 Construction of SVE and AS Wells - Construction of the AS wells will be completed with a maximum of 2 5 feet of 1-inch-diameter, Schedule 40 polyvinyl chloride (PVC), 0 020-inch slotted, flush-threaded casino placed approximately 10 feet below the water table (30 feet bgs) Blank casing will extend from _ the top of the slotted section to ground surface Actual depths of the boreholes and screened intervals will depend on the conditions encountered during drilling, and will be determined in the field ' The AS wells will-be_packed.with No 3-sand_adlacent_to�the 0020-inch screen to�=-=-= 'app`roximately-I�foot-above the top of the screen A minimum 5-foot-thick layer of bentonite pellets or chips will be placed on the top of the sand pack A bentonite-cement slurry will be placed on top of the bentonite pellets or chips and will extend to near ground surface Typical AS well construction is illustrated on Figure 2 The SVE wells will be completed with 15 feet of 4-inch-diameter Schedule 40 PVC, ` 0 030-inch slotted screen, and approximately 5 feet of blank casing The SVE wells will extend _ G K approximately 2 feet into groundwater A�ravel pack of coarse aquarium sand-willabe placed adjacent to the screened interval and,will extend to approximately I foot above the top of the �A-2-foot-thick bentonite seal-will be placed-above the SVE'well-gravel pack The - remaining annular space will -with-he nrnnrrp-rPn,Pnr_�i„rr.,—rl,o_,"-ll,_ . - compl ed at grade using-water-tight lotion; covers ---Typical-SVE well construction is illustrated on Figure 3 r Dual-completion wells will be constructed in a similar fashion as single-completion wells f The sand packs belonging to the AS and SVE wells are separated by a bentonite seal so the two - wells are functionally, mutually exclusive whilestructurally=existing=in-the-same=borehole Typical AS/SVE well construction is illustrated on Figure 4 Connection of the SVE and AS wells to the soil vapor, extractionjreatment�and=air sparging—+ systemwill-be completed during the installation of the SVE/AS system and related piping a Y PROJECT SCHEDULE h This_section_provides-a schedule of-the installation of SVE-and=AS-wells; and-preparation-- ofa site;summary report Use or disclosure of data contained on this sheet is subject to the restriction specified of the beginning of this document 15061REPQRTSMORKPLAN