Laserfiche WebLink
13 July 1998 <br /> AGE-NC Project No 96-0254 <br /> Page 3 of 7 <br /> from depths of 25 to 30 feet bsg(MW-1 A)and from 5 to 15 feet bsg (M W-1 B) A filter pack <br /> was Installed using #3 Lonestar sand from 23 to 30 feet bsg Bentonite chips were used to <br /> make a 8-foot plug between the upper and lower filter sand packs at 15 to 23 feet bsg A <br /> filter pack was Installed using#2 Lonestar sand from 3 to 15 feet bsg Bentonite chips were <br /> used to make a two-foot transition seal above the upper filter pack The remaining annular <br /> space was backfilled to the surface with portland cement A traffic-rated well box (8-Inch <br /> diameter) was installed over each well, in accordance with County regulations <br /> • Well MW-2 was completed with 0 02-inch slotted screen, the screen intervals were installed <br /> from depths of 23 to 28 feet bsg(MW-2A)and from 5 to 15 feet bsg (MW-2B) A filter pack <br /> was installed using#3 Lonestar sand from 22 to 28 feet and from 3 to 15 feet bsg Bentonite <br /> chips were used to make a 7-foot plug between the two filter sand packs Bentonite chips <br /> were used to make a two-foot transition seal above the upper filter pack The remaining <br /> annular space was backfilled to the surface with portland cement A traffic-rated well box <br /> (8-inch diameter) was installed over each well, in accordance with County regulations <br /> I • Monitoring wells MW-3, MW-5 and MW-6 were completed with 0 02-inch slotted screen <br /> the screen interval was Installed from depths of 5 to 15 feet bsg A filter pack was installed <br /> lie using #3 Lonestar sand from 3 to 15 feet Bentonite chips were used to make a 2-foot plug <br /> above the sand filter packs The remaining annular space was backfilled to the surface with <br /> portland cement A traffic-rated well box (8-inch diameter) was installed over each well, in <br /> accordance with County regulations <br /> As-built monitoring well diagrams are in Appendix B <br /> I <br /> 2 2 MONITORING WELL SURVEY AND PURGE PROCEDURES <br /> The casing elevation of each new well was surveyed relative to the elevation of well MWA On 27 <br /> February 1997, a Solinst water level meter was used to measure the depth to ground water in each <br /> Iwell relative to the top of the well casings After ground water depth measurements were collected, <br /> each monitoring well was purged using a two-stage submersible pump <br /> Approximately 6 to 8 gallons of water(a minimum of 3 well volumes per well)were evacuated from <br /> MW 1-A and MW-2A , and 18 gallons of water were from M W-1 B and MW-213 Temperature, pH <br /> and conductivity of the purged water were measured at 2-gallon intervals using an ICM model 52200 <br /> water analyzer to monitor these ground water parameters Field logs of the measurements are <br /> included in Appendix C Purged water was temporarily stored on-site in 55-gallon drums <br /> • <br /> l <br /> Advanced GeoEn\ironmentai Inc <br />