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• ////7AP E11244 Pyrites Way- Gold River,CA 95670 <br /> E NVIROTE C H , INC Phone 916 8510174 - Fox 916 851 0177- Toll Free] 800 242 5249 <br /> September 8, 2005 ^� <br /> Ms Chnstine Babcock <br /> Air Quality Inspector <br /> San Joaquin Valley Air Pollution Control District <br /> 4230 Kiernan Avenue, #130 f, <br /> Modesto, CA 95356-9322 <br /> Subject. SOURCE TEST RESULTS SUMMARY FOR AUTHORITY TO <br /> CONSTRUCT PERMIT NUMBER N-5817-1-0 <br /> COHN Enterprises <br /> 3755 Munford Avenue, Stockton, California 95215 - <br /> Apex Project No COHO1 001 <br /> Dear Ms Babcock <br /> On August 24, 2005, Apex Envirotech, Inc (Apex) conducted the source test as required by the <br /> San Joaquin Valley Air Pollution Control District (SJVAPCD) for the "Authority to Construct" <br /> • listed above Vapor samples were collected from the thermal oxidizer system influent and <br /> effluent in the presence SJVAPCD personnel Attached for your review are the laboratory results <br /> and field data sheets from the test performed on that date Also included are calculations for <br /> mass emission rates, extraction rates, and thermal oxidizer system destruction rate efficiency <br /> Basis of fore rates scfm) (8-24-05)- <br /> Influent <br /> 8-24-OS .Influent flow rate Soil vapor extraction (SVE) blower discharge flow rate is calculated using <br /> flow sensor differential pressure, flow pressure and temperature recorded in the discharge piping <br /> of the SVE blower prior to the combustion chamber <br /> Influent flow rate = SVE discharge (THOXINF) flow rate 130 scfm <br /> Effluent flow rate SVE flow rate + natural gas flow rate (vanable, recorded at gas meter) + <br /> combustion air flow rate = stack flow rate <br /> Effluent flow rate = SVE discharge flow rate (130 scfm) + propane gas flow rate (3 cfm) + <br /> combustion air flow rate (75 scfm) = 208 scfm <br />