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Date Notes <br />Hourmeter <br />Reading (hours) <br />Well Field Temp <br />(°F) <br />Operating <br />Temp (°F) <br />System <br />Vacuum (in <br />Hg) <br />Flow <br />Rate <br />(scfm) <br />FID VOC <br />Influent <br />(ppmv) <br />FID VOC <br />Effluent <br />(ppmv) <br />VOCa <br />(Hexane) <br />Removed <br />(lb/day) <br />Vapor Control <br />Efficiency (%) <br />Table 18 <br />666 West Weber Avenue, Stockton, CA <br />Parcel 2A -L&M OU <br />Apartment Soil Vapor Extraction System-Operating Data <br />Definitions: <br />°F VOC = Volatile Organic Compounds <br />inHg ppmv <br />acfm SJAVOCD = San Joaquin Valley Air Pollution Control District <br />scfm <br />[ ] = Indicates reference to equation <br />FID <br />Notes: <br />- Column under heading VOC (Hexane) Removed (lb/day)added 2Q10 to track removal rate of total VOCs. <br />a = VOC reported as Hexane (molecular weight 86.17) for VOC vapor mass removal rate calculation. Hexane was used <br />because it was most representative of the lower carbon range organics. <br />b = System inspected by the air board and started on 5/31/2007. <br />c = Vapor flow data collected as SCFM. <br />d = Flow rate (acfm) derived from Roots 56 curve with temperature being the average for the system. <br />e = Flame Out <br />f = System switched to operate in catalytic mode. <br />g = Hourmeter malfunction. ASVE hours estimated based on L&M OU SVE system runtime. <br />h = New hourmeter installed on 4/13/11 <br />Equations: <br />VOC Removed/day = <br />[Avg of consecutive (Inf-Eff) Conc (ppmv)/1,000,000] X [86.17 (g/mole)] X [1 lbs/453.59 g] X [1.2641 moles/1 cf] X [Avg of consecutive flow rates (scfm)] X [60 min/hr] X [24 hr/day] <br />Permits: <br />Air emissions are permitted under SJVAPCD ATC Number N-4878-2-0. <br />= Flame Ionization Detector <br />= Parts per million by volume <br />= Authority to Construct= Standard cubic feet per minute <br />= Actual cubic feet per minute <br />= Degrees Fahrenheit <br />ATC <br />= Inches of mercury <br />I:\Tidewater\TW Stockton (P2A)\Engineering\O&M\Tables\O&M Tables 2012\Parcel 2A OM Tables 1Q12.xlsx Page 2 of 2