ARCHIVED REPORTS_XR0010268 - Laserfiche WebLink

Home Browse Search

I I12 June 2003 • AGE-NC Project No 01-0827 ' Page 3 of 7 casing extending from 60 feet bsg to surface grade The filter pack (No 2112 Lonestar sand) was installed approximately 2 feet above the screened intervals in the well A 2-foot bentonite pellet plug was installed above the filter pack in the deep well and allowed to hydrate The monitoring well was Ithen grouted to near the surface with portland cement Water-tight, traffic-rated well boxes were installed over the wells As-built well diagrams are depicted in Appendix A I2 2 3 Well Development IWell MW-6 was developed on 24 April 2003 utilizing a Waterra inertial pump consisting of a dedicated 3/8-inch outer diameter, length-discrete polyethylene hose equipped with a ball-valve I water tip Purge water was extracted by lowering and raising the 3/8-inch polyethylene hose through the water-charged screen section of the well casing Temperature, pH and conductivity of purged ground water were measured using a Oakton water analyzer Ground water was purged until the water was visually sediment free and pH, conductivity and temperature had stabilized Field sheets and data are included in Appendix B Purged water was temporarily stored on-site in 55-gallon DOT- 10 approved H-17 storage drums pending proper disposal After well development, a water sample was collected from the well using a new disposable bailer after allowing the well to achieve a minimum 80% recovery of the pre-purge water volume The I sample was transferred into three 40-m1 EPA-approved volatile organic analysis (VOA) vials and one 1-liter amber bottle The samples were stored in a chilled container and transported under chain- of-custody to CalTech Environmental Laboratory(CTEL)a DHS-certified analytical laboratory The samples were analyzed for • TPH-g and total petroleum hydrocarbons as diesel(TPH-d)in accordance with EPA Method I8015 Modified, • BTEX compounds and fuel oxygenated compounds - tertiary butanol (TBA), di-isopropyl ether(RIPE), ethyl tert butyl ether(ETBE), tert amyl methyl ether(TAME) and MTBE, in accordance with EPA Method 8260 Modified, and 1,2-Dichloroethane (1,2-DCA) and ethylene dibromide (EDB), ethanol and methanol by EPA Method 8260 I 2 3 QUARTERLY WELL MONITORING IOn 23 April 2003, depth to ground water was measured in monitoring wells MW-1 through MW-5 and vapor wells VW-1, VW-2d, VW-3 and VW-5d, and wells MW-1, MW-3, MW-5, VW-1, VW-2d and VW-5d were purged and sampled • Advanced GeoEnveronmental,Inc I �