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00" ti <br /> c <br /> FIGURE 7 <br /> Soil Gas SEMI-PERMANENT GAS PROBE Design <br /> DEPTH'BEL W <br /> SUR u-TRAFFIC RATED 6 INCH DIAMETER <br /> TRAFFIC BOX WITH BOLT DOWN LID <br /> SECURED WITH CONCRETE <br /> GAS TIGHT IMPERIAL FITTING <br /> ATTACHED TO TWO WAY VALVE. <br /> GAS TIGHT TWO WAY VALVE <br /> I 114 INCH TEFLON TUBING <br /> WELL INSTALLATION <br /> HAND AUGER <br /> MAXIMUM DEPTH WELL <br /> AND BORING 5 FEET <br /> a' <br /> �- AI'F` <br /> �TABOVI� <br /> OF•S`AkD <br /> DRY GRANULAR BENTONITI; <br /> 0.5 FEET ABOVE <br /> ------T9P OF SCREEN-------- <br /> #3 C4F,AN SAND PACK <br /> 5 FEET <br /> SCREENED INTERVAL J <br /> WILL BE BETWEEN <br /> EET <br /> 0.5 FIN LENGTH 0.020 INCH SCREEN PVC.SCH 40 <br /> GAS TIGHT SLIP ON PVC END CAP <br /> DIAMETER OF BORING <br /> 5. 3 3%:INCHES <br /> MAXIMUM DEPTH WELL <br /> AND BORING 6 FEET <br /> INSTALLATION <br /> 1. HANDAUGER TO SIX FOOT DEPTH,GEOLOGIST MONITORS WITH PID AND DESCRIBES SOILS IN ACCORDANCE WITH THE <br /> UNIFIED SOIL CLASSIFICATION SYSTEM. <br /> 2. INSTALL A SECTION OF 3/4"DIAMETER PVC SCREEN AND'/.INCH TEFLON TUBING WITH AIR TIGHT END CAP AND AIRTIGHT TOP CAP WITH <br /> CAPPED IMPERIAL FITTING. <br /> 3. INSTALL#3 CLEAN SAND AROUND SCREEN INTERVAL TO 0.5 FEET A13OVE TOP OF SCREEN. <br /> 4. INSTALL I FOOT THICK GRANULATED BENTONITE PELLETS ABOVE SAND PACK <br /> 5. INSTALL HYDRATED BENTONITE FROM TOP OF BENTONITE PELLETS TO WITH 6 INCHES OF SURFACE. <br /> 6. LABEL TOP OF CASING AIRTIGHT CAP AND VALVE WITH PROBE HOLE ID . <br /> 7 PLACE 6INCH DIAMETER TRAFFIC RATED FLUSH MOUNTED TRAFFIC VAULT WITH BOLT DOWN LID,SECURE WITH CONCRETE, <br /> 8 LET WELL STABALIZE AT LEAST 48 HOURS PRIOR TO SAMPLING. <br /> 9. OBTAIN SOIL GAS SAMPLES AS OUTLINED IN WORK PLAN <br /> l <br />