Laserfiche WebLink
I20 December 2001 <br /> AGE- 1- 2 <br /> NC Project No 0 08 7 <br /> IPage 4 of 8 <br /> I' extracted soil-vapor and collection of a set of soil-vapor samples were observed by the APCD <br /> personnel The samples were collected to document baseline concentrations of hydrocarbon vapor <br /> in the soil-vapor extracted by the SVE network and to determine the treatment system hydrocarbon <br />' destruction rate <br />' 26 SOIL-VAPOR EXTRACTION <br /> The SVE system was monitored weekly for the first month of operation and monthly thereafter <br />' During each monitoring event, the flow rate of extracted soil-vapor (influent) was measured using <br /> an electrical DPT flow meter Vacuum potential was measured at the two inch influent line by a <br /> magnehelic vacuum gauge <br /> The organic vapor concentrations in the extracted soil-vapor stream was measured before entering <br /> the blower (influent stream) and after exiting the catalytic unit (effluent stream) using an organic <br /> vapor meter(OVM) equipped with a photo-Ionization detector PID(Thermo Environmental 580A, <br /> 10 OeV, calibrated to isobutylene 100 ppb) <br /> Two sets of soil-vapor samples(influent effluent)and one inlet sample were collected during the first <br /> month of operation Samples were collected on I 1 October, 18 October and 05 November 2001 <br /> Tedlar vapor bags from the influent and effluent stream The samples were labeled, placed in a <br /> pre-chilled cooler and transported under chain-of-custody Samples collected in October were <br /> analyzed by Precision EnviroTech (PET) of Stockton and the sample collected in November were <br /> analyzed by McCampbell Analytical, Inc (MAI), both lab are State of California Department of <br /> Health Services (DHS)-certified analytical laboratories <br /> The vapor samples were analyzed for <br /> • Total petroleum hydrocarbons quantified as gasoline (TPH-g) and diesel (TPH-d) in <br />' accordance with EPA Method 8015 Modified and <br /> • Benzene, toluene, ethylbenzene and total xylenes (BTEX) and methyl tertiary butyl ether <br />' (MTBE) in accordance with EPA Method 8020, <br /> The results of the laboratory analysis are summarized in Table 2 <br /> 1 <br /> 2 7 MONITORING WELL EVACUATION <br /> lie On 10 October 2001, a Solinst water level meter was used to measure the depth to ground water in <br />' ground water monitoring wells MW-1 through MW-5, vapor wells VW-1, VW-2, VW-3, VW5s <br /> Advanced(320LnV1T0nMCnla1,Inc <br /> 1 <br />