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SOURCE TEST RESULTS SUMMARY FOR AUTHORITY TO CONSTRUCT PERMIT NUMBER N-5817-1-0 <br /> COHN Enterprises,3755 Munford Avenue,Stockton,California 95215 <br /> Molecular weights Obs/lb-mole): <br /> • TPHg as = 90 <br /> Benzene = 78 <br /> 1 Lb-mol = 359ft3 <br /> Emission Rates (8-24-05)- <br /> TPH gas = (208ft3/min)(130ft3/1,000,000ft3)(lb-mol/359ft3)(90lb/lb-mot)(1,440min/day) = 9 76 <br /> lbs/day <br /> Benzene = (208ft3/min)(61ft3/l,OOO,000fi3)(lb-mol/359ft3)(78lb/lb-mol)(1,440min/day) = 3 96 <br /> lbs/day <br /> Pounds per day extracted (8-24-05)- <br /> TPH gas (130ft3/min)(9,100ft3/l,000,OOOft3)(lb-mole/359ft3)(90lb/lb-mol)(1,440min/day) = <br /> 427 07 lbs/day - <br /> Benzene (130ft3/min)(130ft3/1,000,000 ft3)(lb-mole/3 5 9 ft3)(7 8 lb/lb-mol)(1,440min/day) _ <br /> 5 29 lbs/day <br /> • Destruction rate efficiency (DRE) (8-24-05): <br /> TPH gas DRE = (130scfm)(9,100ppmv)— (208scfm)(130ppmv) = 0 9771 x 100 = 97 71% <br /> (130scfm)(9,100ppmv) <br /> Benzene DRE = 030scfm)(130ppmv)=_(208scfm)(61ppmy) = 0 2492 x 100 = 24 92% <br /> (130scfm)(130ppmv) <br /> Although the initial DRE for benzene is not in compliance, the total emissions did not exceed the <br /> permitted 47 5 pounds in any one day The vapor extraction system and thermal oxidizer system <br /> were left operating after this source test was completed awaiting analytical results from the <br /> laboratory <br /> Sample results from the source test were received and reviewed on September 1, 2005 Apex <br /> mobilized personnel the next business day to re-sample, and shut the system off due to the results <br /> of the first sampling event The laboratory report of the re-sampling performed on September 2, <br /> 2005 is included with this report <br /> Although the exact cause of the elevated concentrations in the effluent sample is not known, <br /> Apex believes that during the source test performed on August 24, 2005, the system controls may <br /> not have been completely stable (automatic temperature and dilution air controls) due to the high <br /> vapor contaminant levels or laboratory carry over occurred during analysis Results from the re- <br /> sampling event show typical DBE's within permitted guidelines <br />