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' r <br /> EA Engineering,Science,and Technology EA Western Regional Operations <br /> 41 Lafayette Circle <br /> Lafayette CA 94549 <br /> Telephone 530-283-7077 <br /> Fax 510 283-3894 <br /> 29 January 1992y <br /> Michael F Escotto F E B 4 4 1992 <br /> Air Pollution Inspector <br /> San Joaquin County Air Pollution Control District EROINMEI, t t._'��-TH <br /> Nv� <br /> PO Box 2009 PERM IT/SER�'CES <br /> 2321 W Washington Street, Suite 1 <br /> Stockton, California 95201 f <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 6 days since the end of the last reporting period (20 December 1991) <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 />�I <br /> 99 73% 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 />� Sincerer, <br /> roe Muehleck r1, <br /> Environmental Chemist <br /> Douglas E m, Ph D <br /> Project Manager <br /> I <br /> JD n W56/SS91918(1)/IAN92/LTR0 <br /> Enclosures <br /> cc Clint Rogers - Chevron <br /> Mary Meays - San Joaquin County Public Health Services <br /> • <br /> i <br />