Laserfiche WebLink
1 <br />' 12 February 2003 <br /> • AGE-NC Project No 97-0249 <br />' Page 2 of 5 <br />' purge-volume Intervals from each well using an Oakton water analyzer Field data and logs are in <br /> Appendix B Purged ground water was containenzed in 55-gallon drums and was stored on-site in <br /> an area lacking general public access <br /> 2 2 GROUND WATER SAMPLING <br />' Following well purging, ground water levels from each well achieved a minimum of 80 percent <br /> recharge prior to sample collection Ground water samples were collected from the purged wells <br />' utilizing new, disposable polyethylene bailers, and transferred to 40-m1 EPA-approved VOA vials <br /> containing 0 5 ml 18%hydrochloric acid as a sample preservative and 1-liter amber bottles without <br /> sample preservative Care was taken to ensure that visible air bubbles were not present in the vials <br />' after filling and capping Ground water sample containers were labeled with the well designation, <br /> date, time, and sampler's initials <br /> Ground water sample collection from domestic water well DW-1 was achieved by opening a valve <br /> from the water well's outlet sampling port and allowing the well pump to turn on and operate for a <br /> minimum of 15 minutes to purge the well, a sample was collected directly from the running water <br /> into the sample containers <br /> I23 LABORATORY ANALYSIS OF GROUND WATER SAMPLES <br /> Each ground water sample was logged on a chain-of-custody form,placed in a chilled container and <br /> transported to McCampbell Analytical Inc (MAI), a California Department of Health Services <br /> (DHS)-certified laboratory for analysis for <br /> • Total petroleum hydrocarbons quantified as gasoline and diesel (TPH-g and TPH-d, <br /> respectively) by EPA Methods 8015C Modified, <br /> I • Benzene, toluene, ethyl benzene and xylenes (BTEX) and methyl-tertiary butyl ether <br /> (MTBE) by EPA Method 8021B, and <br /> • Methanol, ethanol, tertiary butanol (TBA), di-Isopropyl ether(DIPE), ethyl tert butyl ether <br /> (ETBE), tert amyl methyl ether(TAME) and MTBE by EPA Method 8250B <br /> 3.0. FINDINGS <br /> Ground water elevation, flow direction and gradient were determined from field data collected on <br /> • 04 December 2002, the contaminant Impact to ground water was assessed from laboratory analysis <br /> Advanced GcoEnvironmental,Inc <br />