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r <br /> TEXACO ENVIRONMENT, HEALTH & SAFETY <br /> SOIL VAPOR EXTRACTION OPERATION REPORT <br /> 440 West Charter Way <br /> Stockton, California <br /> Consultant SECOR International Incorporated <br /> Reporting Agency San Joaquin Valley Unified Air Pollution Control District <br /> Reporting Period October 1 - December 31, 1997 <br /> System Equipment AKI SYSTEMS, INC Thermal Oxidizer, 4 dual-completion extraction wells, <br /> 25 HP blower <br /> Operating Mode Thermal Oxidation <br /> Permit# N-3139-1-0 <br /> LABORATORY DATA (mg/M') <br /> PROCESS INFLUENT SUMMARYt'1 29 Oct 97 Nov 97 Dec 97 <br /> TPHg(2) 290 NS NS <br /> Benzene ND(a 2) NS NS <br /> Toluene 3 1 NS NS <br /> Ethylbenzene 1 3 NS NS <br /> Xylenes 13 NS NS <br /> LABORATORY DATA (mg/M') <br /> PROCESS EFFLUENT SUMMARY Oct 97 Nov 97 Dec 97 <br /> TPHg 12 NS NS <br /> . Benzene ND(o 2) NS NS <br /> Toluene 048 NS NS <br /> Ethylbenzene ND(()2) NS NS <br /> Xylenes ND(O 4) NS NS <br /> OPERATING EFFICIENCY Oct 97 Nov 97 Dec 97 <br /> Average inlet temperature ff) 73 2 649 599 <br /> Average outlet temperature (7) 1072 1080 1139 <br /> Average inlet flow rate (scfm) 67 33 34 <br /> TPHg emission rate (lbs/day) 0 3 0 0 <br /> TPHg effluent permit limit 2 lbs/day <br /> TPHg destruction efficiency 100% NS NS <br /> Benzene destruction efficiency 0% NS NS <br /> Total TPHg removed this period 501bs <br /> Cumulative TPHg removed(') 6,234 lbs <br /> % Operation this period 65% <br /> (1)Analyzed by VOC Analytical Laboratory using modified DHS Method for TPHg and EPA Method 8020 for BTEX <br /> • (2)Total Petroleum Hydrocarbons as Gasoline <br /> (3)Cumulative TPHg is based on TPHg removal since system startup by SECOR in January 1996 <br /> ND=Not Detected at or above the laboratory detection limit represented in parenthesis <br /> mg/M'=milligrams per cubic Meter NS=Not Sampled <br /> TESlstocktonlchtrwy497 tbl <br /> 4 / <br />