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EA Engineering,Science,and Technology EA Western Regional Operations <br /> 41 Lafayette Circle <br /> Lafayette CA 94549 <br /> Tefephone 510-283-7077 <br /> fax 510 283-3894 <br /> 20 February 1992 <br /> Michael F Escotto `'' <br /> Air Pollution Inspector F E B 21'. 1992 <br /> San Joaquin County Air Pollution Control District E int<<, � ',ti �� CE HEALTH <br /> P.O.Box 2009 <br /> 2321 W Washington Street, Suite 1 f-ERMI /�sr3?ViCES <br /> Stockton, California. 95201 <br /> RE: Reporting of Hydrocarbon Emissions and Destruction Efficiencies for the Vapor Extraction <br /> and Treatment System Operation at Chevron SS9-1918, 45 Harding Way, Stockton, CA <br /> Dear Mr Escotto <br /> Enclosed are the results from effluent monitoring of the vapor extraction and treatment system <br /> operating at Chevron SS9-1918, 45 Harding Way, Stockton, California The thermal oxidizer <br /> has been in operation for 25 days since the end of the last reporting period (29 January 1992) <br /> The thermal oxidizer data table (Table 1) includes analysis date, operating temperature, hydro- <br /> carbon compound concentrations, average daily influent concentration, and percent total volatile <br /> hydrocarbon destruction efficiency for each effluent sample analyzed Since the last reporting <br /> period, all effluent samples have exceeded the 95% minimum destruction efficiency, averaging <br /> 98 18% destruction efficiency <br /> Should you have any questions regarding this project or the contents of this letter, please do not <br /> hesitate to call us or Terry Winsor at the above number <br /> Sincerely, <br /> e z---2�� <br /> Joe Muehleck <br /> Env' onmental Chemist <br /> Douglas E Or , Ph D <br /> Project Mana er <br /> JD n . WS6/SS9 19190)/FE1392/LTR 0 <br /> Enclosures <br /> cc Clint Rogers - Chevron <br /> . Mary Meays - San Joaquin County Public Health Services <br />