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amec— <br /> TABLE <br /> B.1-2 <br /> Backup for Unit Construction Costs <br /> In Situ Air Sparging Biobarrier <br /> Nestle Ripon <br /> ITEM NO UNIT NOTE/CALCULATION <br /> a curtain length 4500 FT from cross section <br /> b depth to water 25 FT from cross section <br /> G depth to top of treatment interval 75 FT from cross section <br /> d depth to base of treatment interval 200 FT from cross section <br /> e treatment interval thickness 125 FT =d-c <br /> f zone of influence 15 FT recommended value(USAGE,2008; ESTCP,2002) <br /> g overlap 1.3 typical value <br /> h sparge well spacing-lateral spacing 12 FT =f-g <br /> i sparge well cluster locations 374 EA =a/h-1 <br /> j depth interval spacing for sparge wells 15 FT higher end of recommended value-see white paper <br /> k sparge wells per location(per cluster) 8 EA =e/j <br /> I total number of sparge wells 2992 =i x k <br /> m total well depth per location 1180 FT summation series=d+(d-j)+(d-2j)+........(d-7j) <br /> n total well footage for entire alignment 441320 FT =m x i <br /> 0 drilling rate 200 FT/day amec assumption <br /> P drill crews 4 <br /> q days on site 552 DAY =n/(p x o) <br /> r sparge pulse time 6 HR duration sparge wells are on each day <br /> S sparge flow rate 20 CFM recommended value-see white paper <br /> t %wells sparging 0.25 =r/24 <br /> u total cfm 15000 CFM =I x s x t <br /> v total cfm/125 cfm 120 =u/125(for use with NAVFAC,2001) <br /> W site width 50 FT <br /> x site area 5 ACRE =axw/43560 <br /> y system run time 350 DAY/YR assume system operates 350 days per year <br /> Z total hours runtime 8400 HR =y x 24 <br /> as horsepower per 125 cfm 30 hp/125 CFM from NAVFAC,2001 -horespower run 125 cfm blower <br /> bb annual power consumption 22567 MW-hr =z x as/1.34 hp/kW/1000 kW/MW <br /> Notes <br /> cells highlight blue are calculated values <br /> AMEC Geomatrix, Inc. <br /> \\oad-fs1\doc_safe\9000s\9837.006\4000 REGULATORY\FS Assessment_Apx B_012711\Attachment B.1\Attachment B.1-Air Sparging-Tables B.1-1 to B.1-3.xls Page 1 of 1 <br />