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T"-2 • Soll Vapor Extractllrstem Emission Data ARCO Service Station#2093 3425 Tracy Boulevard,Tracy,California TPH as Gasoline Benzene Effluent Effluent Hour Meter Blower Average Concen Emission Destruction Concen- Emission Destruction Is System Sample Date Reading Vacuum Flow Rate tration Rate Efficiency tration Rate Efficiency In Compliance ID Sampled (hours) ("H2O) (scfm) (ppmv) (lbs/day) (percent) (ppmv) (lbs/day) (percent) with AQMD EFFL 12/15/1999 14,957 60 72 ND 00 100% NO 0 000 100% Yes EFFL 1/26/2000 14,957 62 61 NO 00 100% NO 0 000 100% Yes EFFL 2/16/2000 15,460 63 55 NO 00 100% NO 0 000 100% Yes EFFL 3/15/2000 15,461 60 47 NO 00 100% NO 0 000 100% Yes EFFL 4/26/2000 16,469 50 80 NO 00 100% NO 0 000 100% Yes EFFL 5/25/2000 16,470 60 61 ND 00 100% NO 0 000 100% Yes EFFL 6/29/2000 17,022 60 51 ND 00 100% NO 0 000 100% Yes EFFL 7/27/2000 17,693 52 80 NO 00 100% NO 0 000 100% Yes EFFL 8/28/2000 17,693 50 90 NO 00 100% NO 0 000 100% Yes EFFL 9/29/2000 18,462 55 71 ND 00 100% NO 0 000 100% Yes EFFL 10/23/2000 18,462 45 78 ND 00 100% NO 0 000 100% Yes EFFL 11/28/2000 19,326 50 70 ND 00 100% ND 0 000 100% Yes EFFL 12/18/2000 19,326 50 88 NO 00 100% NO 0 000 100% Yes EFFL 1/16/2001 20,024 48 73 ND 00 100% NO 0 000 100% Yes EFFL 2/13/2001 20,024 50 72 ND 00 100% NO 0 000 100% Yes EFFL c 4/17/2001 20,746 50 71 ND 00 100% ND 0 000 100% Yes EFFL c 5/21/2001 21,560 50 72 ND 00 100% ND 0 000 100% Yes EFFL 6/25/2001 21,560 - -- - Yes EFFL 7/12/2001 21,560 -- -- -- -- - -- - Yes EFFL 8/17/2001 21,560 -- - - -- - - Yes EFFL 9/11/2001 21,560 -- -- - - - Yes EFFL 10/15/2001 21,560 -- -- Yes EFFL 11/16/2001 21,560 -- -- Yes EFFL 12/4/2001 21,560 - -- -- -- Yes EFFL 1/15/2002 21,560 - - - Yes EFFL 2/8/2002 21,560 -- - -- - -- -- Yes EFFL 3/11/2002 21,560 - -- Yes EFFL 4/12/2002 21,560 - -- -- - -- Yes EFFL 5/3/2002 21,560 - - -- Yes scfm =Standard cubic feet per minute ND =Not detected ppmv =Parts per million by volume a =Prior to April 1998 data was collected and reported by Brown and Caldwell lbs =Pounds b =TPH-g and benzene concentrations reported as NO are taken as 0 ppmv for calculation purposes =Not applicable or not analyzed c =system effluent from field FID readings TPH = Total purgeable hydrocarbons AQMD =Air Quality Management District "H2O =Inches of water K 1J5 SP ARM02091rable 1_2_3 4_5)ds Page 2 of 2