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♦ - _ _ ,t - „ it - - FS 19 December 2003'- 4 AGE-NC Project No 950128 _ -- • Page 11 6f12 of recovered hydrocarbon vapors The;PID`will monito the-coneent_rations of hydrocarbon.vapors 4 - - . - f' . record before and after cat_al i'c destruction c ' from the Influent and' ffluent ends of the SVE,unit-to _ . Yt .. ' r'r After start-up,:the SVE unit will be inoriifored weekly using the PID and Dwyer DS 200 flow sensor ; i to ensure optimal destruction of recovered hydrocarbon=vapors.and to monitor cleanup,progress. In - addition,vapor""samples will be collected on a izionthly basis from.the influent and effluent ends'ofthe'a. VES utilizing the vacuum pump on_a Model 580B organic vapor.irieter.(Thermo Environmental _ '-h Instruments Inc.); the'saniples-_wMl be collected in Tedlar bags, placed in a chilled--c and,'• _' _ transported under chain-of-custodyyrocedure to_a.DHS=certified labor ato for:anal sis is p .pi 4 4 . y The SVE and ground water extraction systems will be maintained on a weekly-basis;according to .. manufacturers recommendations::A ' stabilizat'ion,routine-maintenance would represent the only periods of`-`down time"for-the unit.One totwo times each month(assuming 24=houryoperation),the- _ -unit will'-be shut down for routine maintenance procedures such as.lubricatiori ..oilchanging,-and L_ .. system-adjustriients: - _ L 4.3. GROUND WATER:EXTRACTION ACTIVITIES Ground water will he extracted from the.new extraction well--(EW-2)'as well as the=established:EW 1 _ r - utilizing a subinersible 4-inch diameterGrundfos Red iflow;self primnihk downholepumps.Thepump = which`will be:outfitted.with autornated•_electronic..shut=off controls to confroh:wateraentering the system. AGE:anticipates-total-ground water extraction-flow between-three"and four GPM from an-, P - individual well to control the volume.ofproducedwater:During the pumping operation,the estimated, ground water extraction treatment flow z-ate will.be-four GPM-..-From each well -head,,extracted. ground water will be routed through a sediment:pre filter and-into a,h6lding tank, from which'it will _ pass through_a.-process pump;to the-GAC vessels for discharge - 4.4:. PERMITTING' 4 . An application'-for a site specific permit will be submitted to:the San Joaquin Valley,=Air Pollution., . 7. - _ - -. Control District(SJVAPCD)prior to initiation ofthe remediation project In addition,properbuiiding permits will be obtained from.the .City of_Stockton Building-DePdhment- the,electrical_service, z T installations. All:necessary w.elkboring permits will be submitted to_ttie EHD prior to any drilling activities _A - minimum-of 48,hourg.notice will-be given,to the EHD.pnorto perfarrriing any field work. 7. r ^ - :Adpa icedCeoEnvironmpiIaI -Inc..