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it <br /> CHAPIN BROTHERS, INC. <br /> May 25, 1995 i, <br /> Page 5 <br /> operational performance is not observed during the system check, modifications will be made to <br /> the system until proper performance is observed. '+ <br /> TASK 2« VAPOR EXTRAO''TIONl,AIR SPARGYNG SYSTEM RENTAL <br /> • Procure Equipment $150 <br /> o Internal Combustion Engine <br /> Purchase Price: ($34,0(() x 1.0725) x 1.15 $41,935' i <br /> Monthly rental cost: ($3",800/month x 12 months) x 1,15 $52,440 <br /> • Air Sparging Blower <br /> Purchase Price: ($2,400 x 1.0725) x 1.15 il $2,960' <br /> N <br /> 0, Freight Cost (both units) 1 4 <br /> Subtotal $45,480' <br /> The subtotal cost is based on purchasing an internal combustion engine and an air sparging <br /> blower unit. l <br /> TASK 3: SYSTEM MONI'TORIN& AND COLLECTION OF MONTHLY AIR SAMPLES <br /> FOR ONE YEAR <br /> • System Monitoring and Sampling $7,200 <br /> 4 Project Management (Client and Regulatory <br /> Correspondence) ; $900 <br /> • Miscellaneous field and sampling equipment $1,{X}0 <br /> r ' ' <br /> e Mileage ; $2,295 I <br /> Subtotal $12,095 <br /> The cost for Task 3 covers system monitoring, sampling and project management for a period of <br /> one year. The treatment system will lie monitored on a daily basis for the first two weeks. After <br /> the.system has stabilized, the unit will he monitored on a weekly basis. System monitoring will <br /> include field monitoring using aphoto��ionization detector, and other routine system monitoring <br /> activities. O>:ound water in the vicinity of the air sparging wells will be monitored for dissolved ' <br /> oxygen levels (DO). Carbon dioxide (CO2), TPH as gasoline,:BTEX, and oxygen (0) will be t <br /> monitored from the vapor stream in the unsaturated zone as indicators of active biodegradation. v <br /> ne passive product skimmers will be periodically checked for.product level and any accumulated R: <br /> product will be removed and transferred into an on-site D.O.T. approved container. Sampling of <br /> the influent and effluent air streams will be performed on a weekly basis to demonstrate ongoing <br /> compliance as required by the guidelines of SJVUAPCD, <br /> v <br /> WALLACE•KUHL <br /> r,„,ckr”;• GASSOCIATES INC. <br /> `-.rs , nr,rac 1 .:.a r,� I •.�nr. -N a �L' -'J 11Hr.i -c T h T f-1W 1 Com.—C%--A H1.1 <br />