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i <br /> , 1 <br /> ! ; 09 March,2005 <br /> ,. AGE-NC Project No 95-0121 <br /> Page 2 of 7 <br /> Magriehelic vacuum gauge is attached to the inlet of the blower Air flow is monitored using a <br /> Dwyer DS-200 flow sensor The flow rate is determined from the measured differential pressure and <br /> the piping diameter using a nomograph (Appendix A) The vapor stream at the SVE inlet is <br /> monitored for the presence of organic vapor using an organic vapor analyzer(OVA)equipped with <br />' a photo-ionization detector(PID Thermo Environmental 580A, 10 0 eV,calibrated to isobutylene) <br /> Sampling ports are installed upstream of the vacuum blower inlet to recover influent soil vapor <br /> stream samples, and downstream of both carbon canisters to recover effluent stream samples to <br /> monitor the efficiency of hydrocarbon filtration SVE monitoring data is included in Table 2 <br /> 2 1 1 Collection and Analysis of Soil Vapor Samples <br /> Influent soil vapor samples were collected on 22 July, 31 August, 22 September, 25 October, <br /> 22 November, and 22 December 2004 The samples were collected in Tedlar vapor bags using a` <br /> p p g g <br /> f ' vacuum pump attached to the influent sampling port The samples were labeled,placed in a chilled- <br /> container, and transported under chain of custody to either Cal`Tech'Environmental Laboratories <br /> (CTEL) or Castle Analytical Laboratory (CAL) for analysis Both laboratories are certified by the <br /> California Department of Health Services (DHS) <br /> The samples were analyzed for <br /> F <br /> • Total petroleum hydrocarbons quantified as gasoline (TPH-g) in accordance with EPA <br /> Method 8015 Modified (CTEL) or 8015 (CAL), and <br />' Benzene, toluene, ethylbenzene, and total xylenes (BTEX) and methyl tertiary-butyl ether <br /> (MTBE) in accordance with EPA Method 8021 (CTEL) or 8020 (CAL) <br /> 22 THIRDARTER R <br /> QU GROUND WATER MONITORING EVENT , <br />' Aground water monitoring event was conducted on 19 July 2004, ground water monitoring wells <br /> MW-1 through MW-,9 were monitored and sampled _ <br /> 11 <br /> xt <br /> 2 2 1' Well Monitoring and Evacuation „ <br /> + , A Solinst water level meter,was used to measure the depth to ground water in monitoring wells <br /> MW-1 through MW-9, from the top of the well casings to the nearest 0 01-foot Ground water <br /> elevations were calculated by subtracting the measured depth to ground water from the surveyed <br /> casing elevation (Table 3) <br /> I <br /> Advanced GeoEnvoronmental,Inc <br /> 1 r 1 <br /> ! <br /> F <br />