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LOCKING WELL COVER <br /> CONCRETE APRON <br /> LOCKING CAP <br /> NEAT CEMENT <br /> BLANK 40 PVC CASING (SCHEDULE 40) 1 FEET <br /> 0 — 5 FEET <br /> BENTONITE PLUG <br /> 2 FEET <br /> FILTER PACK (#2 SAND) <br /> 0.020 SLOTTED PVC SCREEN (SCHEDULE 40) � <br /> 5 — 15 FEET <br /> TOTAL DEPTH 15 FEET <br /> CAP <br /> 8 BOREHOLE DIAMETER <br /> VAPOR WELL WELL DESIGN <br /> ALL DEPTHS RELATIVE TO SURFACE GRADE <br /> NOT TO SCALE <br /> SOIL VAPOR EXTRACTION WELL DESIGN 4dv,7,,) d <br /> GeoEnvironmental, Inc. <br /> CHAPIN BROTHERS INC. ofiVorthsm Ckhfrae <br /> 1766 M 0 NTE D IAB LO PROJECT NO.AGE—NC-95-0103 FILE: 0103/FIG 4 FIGURE <br /> STOCKON, CALIFORNIA DATE: 07 APRIL 1997 DRAWN BY: MAC 1 4 <br />