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GROUND ZERO ANALYSIS,INC. <br /> 1714 Main Street <br /> Escalon,California 95320-1927 <br /> Telephone:(209)838-9888 <br /> Facsimile:(209)838-9883 !(� <br /> EC E IV <br /> SEP 18 2012 <br /> September 10,2012 <br /> San Joaquin Valle Air Pollution Control District ENVIRONMENTAL HEALTH <br /> 9 Y PERMIT/SERVICES <br /> 4800 Enterprise Way <br /> Modesto, California 95356 <br /> Attn: Mr Steve Brodie <br /> Subject: Source Test Results for Soil Vapor Extraction System <br /> SJVAPCD Authority to Construct Permit No. N-8656-1-0 <br /> Valley Pacific Petroleum Services, 930 Victor Road, Lodi, California <br /> Dear Mr. Brodie: <br /> We are writing to transmit the results of the recent compliance source test of the soil vapor extraction <br /> system at the Valley Pacific Petroleum Services, Inc. (VPPS)site located at 930 Victor Road in Lodi, <br /> California. <br /> Source testing was conducted under your supervision on August 29, 2012. Average flow rate was <br /> approximately 100 cubic feet per minute (cfm). System influent and effluent vapor samples were <br /> collected in Tedlar bags using a vacuum box and were submitted under chain of custody protocol to <br /> State-certified Eurofins Air Toxics laboratory for analysis. The samples were analyzed for Total <br /> Petroleum Hydrocarbons as gasoline (TPHg) and for benzene, toluene, ethylbenzene and xylenes <br /> (BTEX) by EPA Method TO-3. Laboratory results are summarized in Table 1; the lab report is <br /> included as Attachment A. Volatile Organic Compound (VOC) extraction and emissions rates and <br /> destruction efficiency were calculated using the concentration of TPHg: <br /> VOC Extraction Rate in pounds per dav: <br /> Rate(lbs/day) =Flow(cfm)x Influent Conc. (gg/L)x 1440 min/day x 28.32 L/cf x 2.205 E-9 lbs/4g <br /> =Flow(cfin)x Conc. (ug/L)x 8.99E-05 <br /> = 100 cfin x 1,400 ug/L x 8.99E-05 <br /> = 12.59 lbs per day <br /> VOC Emissions Rate in pounds per day: <br /> = 100 cfm x 26 ug/L x 8.99E-05 <br /> =0.23 lbs per day <br /> VOC Destruction Efficiency <br /> = 1 —(Effluent Conc./Influent Conc.) <br /> = 1 —(26/1,400) <br /> =98.1% <br /> G:\GROUNDZE\WOOLSEY.ROB\SVES\Source Test Letter to SJVAPCD.doc <br />