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1 <br /> ATTACHMENT A <br /> THERMAL OXIDIZER ANALYTICAL TESTING PROCEDURE <br /> Montgomery Ward Auto Service Center <br />' 5400 Pacific Avenue, Stockton, California <br /> Permit To Construct #N-4147-1-0 <br /> Thermal Oxidizer Testing Procedure <br />' The location of sample ports used during the testing is presented in Figure 2 The <br /> concentration of volatile organic compounds in extracted soil air was measured at the <br /> discharge of the vacuum blower The soil gas flow rate was measured by an in-line <br /> flowmeter FIR was corrected to standard conditions <br /> The flow rate of combustion gases was calculated as the sum of extracted soil air and <br />' combustion air The flow rate of combustion gases was calculated based on blower design <br /> flow rate multiplied on relative opening of the valve installed at the combustion blower <br /> discharge <br /> Prior to taking readings from the combustiong ases, the oxidizer was disconnected from the <br /> remediation wells and was run on ambient air by completely opening the air dilution valve <br /> IThis was done to evaluate the level of methane slipped through the combustion chamber All <br /> readings, sampling in Tedlar bags, and analytical testing were performed by the independent <br /> laboratory, Precision Enviro-Tech Analytical Laboratory (see Attachment B) <br /> BS 1232 AQ Perm2 <br /> I <br />