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<br />Division of Air Quality <br />l1PCA <br /> <br />Louis M. Chamberlain, P.E., Chief <br />Engineering Section <br />Division of Air Quality <br /> <br />11/7/78 <br /> <br />Ahto N!emioja <br />Engineering Section <br />Division of Air Quality <br /> <br />Inspection of Gordon Rendering Co. in City of New Brighton <br />on November 1, 1978 - DAQ File i133 <br /> <br />7392 <br /> <br />PURPOSE: In accordance with an operation license issued by the city <br />of New Brighton the company has to test their air pOllution control <br />equipment every 6 months. The results of odor tests. by. f.!!1T Environ- <br />menta-lj:nc. sho'tV'ed that the company 1:-[as in v~ola:t.!o'Ii. of-APC 9. Ad- <br />ditional testing by ~n1T Environmental Inc. in october after certain <br />modifications in the control equipment ShOt1ed very low' emission <br />levels. Inspection was made to assure the good operation of the <br />emission facility. <br /> <br />Modification and Corrections <br /> <br />- The company installed a chlorine feed to the air stream going <br />through th~ evaporative surface condenser, where the cooling water <br />acts as a scrubbing media. <br /> <br />- The stainless steel tubes in the evaporative surface condenser <br />which provide the heat transfer area where badly scaled with grease <br />and tallow decreasing the efficiency of heat transfer. The scaling <br />was cleaned off. <br /> <br />- A trickle of condensed vapors from the cooker were leaking into <br />the recycle water tank causing additional odor problemsCthe company <br />estimated 90% of tile odors originated through the leak). The cor- <br />roded portion of the drain pipe ""as replaced. <br /> <br />- Cooking vapors on top of the evaporative surface condenser were <br />leaking through welding cracks into the outlet air. <br /> <br />Resnlts of the Repairs <br /> <br />- The temperature in the condensate dropped (170 degrees F-+140 degrees F). <br /> <br />- The temperatnre in the outlet air dropped (112 degrees F-~78 degrees F). <br /> <br />- Air through the pollution control system increased (38,000 CFM~4l,OOO <br />CFM). <br /> <br />- Odor units in the outlet air were measured to be about 2o.u.'s. <br /> <br />- Slight chlorine odor detectable in the outlet air eY~aust. <br /> <br />AN/mp <br /> <br />oc: Dave Fridgen, City of Nc\( Brighton <br />Mark Wojcik, Gordon Rendering <br />DAQ File 1133 <br />