Laserfiche WebLink
' 13 July 1999 <br /> AGE-NC Project No 95-0142 <br /> Page 2 of 4 <br /> 2 2 GROUND WATER SAMPLE COLLECTION , <br />' Water samples were collected from each purged well using new, clean, disposable plastic bailers. <br /> Immediately upon retrieval, the samples were transferred into EPA-approved 40-m1 VOA vials, , <br />' containing 0.5 milliliter hydrochloric acid (18%) as a sample preservative The vials were then <br /> labeled and placed in a chilled container The samples were transported under chain-of-custody to } <br /> McCampbell Analytical, Inc (MAI) a DHS-certified laboratory in Pacheco, California for analysis <br />' Ground water samples were analyzed in accordance with <br /> • EPA Method 8015 Modified for total petroleum hydrocarbons quantified as gasoline (TPH- <br /> 1 g), <br /> • EPA Method 8020 for volatile aromatic hydrocarbons (benzene, toluene, ethylbenzene and <br />' total xylenes BTEX), <br /> • EPA Method 8260 Modified for di-isopropyl ether(DIPE),ethyl tertiary butyl ether(ETBE), <br /> methyl tertiary butyl ether (MTBE), tertiary amyl methyl ether (TAME) and tertiary butyl <br />'• alcohol (TBA) <br /> I3.0. FINDINGS <br />' Ground water flow direction and fgradient were calculated from the field data The current <br /> distribution of dissolved petroleum hydrocarbons was inferred from the laboratory analytical results <br /> from the ground water samples <br /> 3 1 GROUND WATER GRADIENT AND DIRECTION <br />' Det and water at the site ranged from 24 91 feet to 25 66 feet below the well casing to <br /> Depth to gra g g s P <br /> The relative ground water elevation data is depicted in Table 1. During the June 1999 monitoring <br />' event, the groundwater flaw direction appeared to be easterly ,The relative elevation of theground <br /> water surface at the site is illustrated on Figure 3 <br /> I <br /> Advanced GeoEnviron mental,Inc <br /> I Y <br />