Laserfiche WebLink
' 11 December 2001 <br /> • AGE-NC Project No 95-0184 <br />' Page 2 of 5 <br />' 2 2 COLLECTION AND LABORATORY ANALYSIS OF GROUND WATER SAMPLES <br /> Water samples were collected,from each purged well using new disposable plastic bailers After the <br />' wells have been sampled, one uncontaminated tap-water sample was pumped through one of the <br /> decontaminated purge pumps and was collected, this sample (an equipment blank) was requested <br /> by the PHS-EHD to assess the adequacy of purge-pump decontamination procedures <br />' Each water sample was transferred into laboratory-supplied 40-al VOA vials containing 0 5 ml 18/ <br />' hydrochloric acid as a sample preservative,the sample from MW-4 was also transferred into a 1-liter <br /> amber bottle without preservative After collection, the samples were properly labeled, placed in a <br /> chilled container, transported under chain-of-custody to McCambell Analytical Laboratories,Inc , <br />' and were analyzed for <br /> • Total petroleum hydrocarbons quantified as gasoline (TPH-g) in accordance with EPA <br />' Methods 5030 and 8015m, <br /> • Total petroleum hydrocarbons quantified as diesel(TPH-d)in accordance with EPA Methods <br />'• 3550 and 8015m, <br /> ® Volatile aromatic hydrocarbons-benzene,toluene, ethylbenzene and total xylenes(BTEX), <br /> and methyl tertiary-butyl ether(MTBE) in accordance with EPA Method 602/8020, and <br />' • Fucl oxygenates di-isopropyl ether (RIPE), ethyl tertiary-butyl ether (ETBE), MTBE, <br /> tertiary-amyl methyl ether (TAME) and tertiary butanol (TBA) in accordance with EPA <br />' Method 8260 Modified <br /> Due to an error with the analytical test requests on the chain of custody form, volatile organic <br /> compounds (VOCs) by GC/MS (full-scan 8260) were not analyzed this quarter <br /> I <br />' 3.0. FINDINGS <br /> Ground water elevation and flow direction were inferred from field data, hydrocarbon-impact to <br />' ground water was quantified by laboratory analysis of the ground water samples <br /> I3 1 GROUND WATER GRADIENT AND FLOW DIRECTION <br /> The elevation of ground water in each well was calculated by subtracting the depth to ground water <br />' from the surveyed casing elevations (Table 1) Depths to ground water ranged from 31 00 feet to <br /> • 31 59 feet below the tops of the well casings, however, ground water levels are as high as <br /> Advanced GeoEnvironmental,Inc <br /> 1 <br />