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16 January 2001 <br /> • AGE-NC Project No 97-0290 <br /> IPage 2 of 6 <br /> I preservative After collection, the samples were properly labeled, placed in a chilled container and <br /> transported under chain-of-custody to Alpha Analytical Laboratories (AAL) and were analyzed for <br /> • Total petroleum hydrocarbons as gasoline and diesel (TPH-g and TPH-d) in accordance with <br /> EPA Methods 8015 Modified, <br /> • Volatile aromatics benzene, toluene, ethylbenzene and xylene (BTEX) in accordance with <br /> EPA Method 8020, <br /> • Oxygenated compounds di-isopropyl ether (DIPE), ethyl tertiary-butyl ether (ETBE), <br /> MTBE, tertiary-amyl methyl ether (TAME) and tertiary butanol (TBA) In accordance with <br /> 8260 Modified <br /> 23 SOIL-VAPOR EXTRACTION <br /> The SVE system operation was monitored monthly and during re-starts During the monthly <br /> monitoring events, the flow rate of extracted soil-vapor was measured using a Dwyer pressure flow <br /> meter <br /> Vacuum (potential) was measured at wells VW-1 and VW-2 using a magnehelic vacuum gauge The <br /> organic-vapor concentration in the extracted soil-vapor stream was measured before entering the <br /> blower (influent stream) and after exiting the oven (effluent stream) using an organic vapor meter <br /> (OVM) equipped with a photo-ionization detector PID (Thermo Environmental 580A, 10 OeV, <br /> calibrated to isobutylene 100 ppb) <br /> Three sets of soil-vapor samples were collected during the first quarter of operation Samples were <br /> Icollected on 05 October, 20 October and 27 November 2000 in Tedlar vapor bags using a vacuum <br /> pump attached to the influent and effluent stream The samples were labeled, placed in a pre-chilled <br /> cooler and transported under chain-of-custody to McCampbell Analytical, Inc (MAI) in Pacheco <br /> The samples were analyzed by <br /> • EPA methods 8015M for TPH-g and <br /> • EPA method 8020 for BTEX <br /> 24 SPARGE SYSTEM INSTALLATION/MONITORING <br /> IThe effect of the IAS system was monitored three times during the quarter utilizing a YSI-55 <br /> dissolved oxygen meter on ground water During each monitoring event, the depth to ground water <br /> IAdvanced GeoFniron mental Inc <br /> I <br />