Laserfiche WebLink
F <br /> 12 February 2002 <br /> AGE-NC Project No 97-0312 ; <br /> Page 16 of 18 <br /> a <br /> i q � <br /> All extracted groundwater will be stored in a temporary, above-ground(Baker-type), storage tank ` { <br /> I "Grab"ground water samples will be collected from the Baker tank for analysis for the site-specific r <br /> chemicals of concern noted in Section 3 6 The site is not serviced by a municipal sewer system a <br /> Therefore, purged ground water will be transported to a suitable non-hazardous waste <br /> disposal/recycling facility The expense associated with transporting treated water will significantly <br /> Increase the cost of ground water extraction as a remediation alternative <br /> IGraphing and modeling will be used to analyze the data and determine aquifer characteristics <br /> Procedures and results of the extraction test will be included in a report prepared under the ' M <br /> supervision of a California Registered Geologist to be submitted to EHD following the extraction <br /> t , <br /> test <br /> 4 8 SVE SYSTEM AND PILOT TEST <br /> An 8-hour SVE pilot test will be conducted at the site The test will be conducted using a vapor <br /> extraction system(VES),VACLEEN 1000G,manufactured by Environmental Techniques The VES <br /> consists of a positive-displacement blower,driven by an internal combustion(IC) engine The inlet ; <br /> of the VES will be connected to a selected SVE well(VW-1) Air-tight well caps fitted with attached <br /> Magnehelic vacuum gauges will be attached to the surrounding SVE wells (VW-2, VW-3 and <br /> VW-4)and the induced vacuum will be measured at these monitoring points Well construction and <br />' location details are presented in Table 7 The air stream from the extraction well will be monitored <br /> for the presence of organic vapor using a PID The vacuum applied to the extraction well will cause <br /> volatile hydrocarbons in the soil to volatilize and flow through the vacuum pump to the IC engine <br />' The extracted hydrocarbon vapor will be destroyed in the IC engine as part of its internal combustion <br /> process Emissions from the engine will be routed through two catalytic converters to maximize the ' <br />' destruction of hydrocarbon vapor <br /> 4 8 1 Field Measurements <br /> During the,vapor extraction pilot test the air flow will be monitored using a Dwyer DS-200 flow <br />' sensor The flow rate will be determined from the measured differential pressure and the piping <br /> diameter using a nomograph Flow rates will be measured and documented in standard cubic feet <br /> per minute (scfm), Inches of water of differential pressure Induced vacuum measurements will be W <br />' recorded from the surrounding SVE wells utilizing Magnehelic gauges The induced vacuum will <br /> be monitored for a stabilized value in Inches of water during the pilot test Hydrocarbon <br /> concentrations in the well effluent stream will be measured at regular intervals A PID will be ' <br />' utilized for field measurements <br /> 1 <br />' Advanced GeoEnvironmental,Inc 4 <br /> 1 <br />