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Table 2 - Summary&ES Operation • Unocal Service Station No 6981 4707 Pacific Avenue Stockton, California estructian Hour Wellhead Influent Effluent Effie Date Meter Flow Rate TPHg MTPHg Cumulative Benzene MBenzene Cumulative Flow Rate TPHg MTPHg Benzene MBenzene TPHg Reading (scfm) (ppmv) (lbslday) MTPHg (ppmv) Obs/day) MBenzene (scfm) (ppmv) (lbs/day) (ppmv) (lbs/day) M 09-20-00 18307 152 1 63 3 05 14,752 <0 14 <0 006 183 285 6 <05 <0 05 <0 003 <0 0002 >99 17 09-28-00 18360 1644 45 2 34 14,758 <0 03 <0 001 183 4567 <05 <0 1 <0 003 <0 0004 >98 82 10-25-00 18360 1267 78 3 12 14,758 <0 29 <0011 183 247 3 <26 <02 <0 03 <0 002 >96 61 10-30-00 18480 1555 42 2 08 14,771 <0 14 <0 007 183 2468 <2 6 <02 <0 03 <0 002 >93 75 11/28/004 0 5 137 4 77 3 37 14,771 <0 07 <0 003 183 3165 6 5 0 7 <0 01 <0 001 91 60 12-01-00 70 1368 45 194 14,779 <0 14 <0 006 183 2444 <2 6 <02 <0 03 <0 002 >94 12 12-15-00 72 1477 47 222 14,779 <0 14 <0 006 183 377 8 <05 <0 1 <0 03 <0 003 >98 89 12-21-00 217 1567 53 2 62 14,794 <0 14 <0 007 183 2463 <05 <0 04 <0 003 <0 0002 >99 00 01-23-01 218 121 3 <2 6 <0 10 14,794 <0 01 <0 001 183 2463 <2 6 <0 21 <0 014 <0 0010 10000 01-31-01 325 System down due to mechanical failure moo. lbs/day = pounds per day MBenzene = mass of benzene MTPHg = mass of TPHg ppmv = parts per million by volume scfm = standard feet per minute i System shut down on 10/26/97 due to the failure of the flame detector The flame detector was replaced on 1215197, and the system operated approximatley 3 hours Influent and effluent samples were collected to confirm detector operation and destruction effeciency, then the system was shut down pending reciept of analytical data Dilution valve control motor replaced and system restarted on 12/21/97 2 Sample of effluent inadvertently not collected on 3122/99 3 Service station facilities were removed Power to VES originally came off the main breaker panel for the service station Station demolition required a new service drop from power company, which was not completed until August 2000 4 New hour meter installed Stockton to 6981 140124 04