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ENVIRONMENTAL AUDIT, INC. <br /> 1000-A ORTEGA WAY • PLACENTA; CA 92670-7125 <br /> 714/632-852 .6 DWM0 AAA754 <br /> October 15, 1996 <br /> Project No. 1232 <br /> Mr. Fred Cruz <br /> San Joaquin Valley Unified Air Pollution Control District <br /> 4230 Kiernan Avenue, Suite 130 <br /> Modesto, CA 95356 <br /> RE: REQUEST FOR PERMISSION TO USE 250 CFM UNIT <br /> SOIL VAPOR EXTRACTION PILOT STUDY <br /> Montgomery Ward Auto Service Center <br /> 5400 Pacific Avenue, Stockton, CA 95207 <br /> Dear Mr. Cruz: <br /> Environmental Audit, Inc. (EAI) submitted an application to your office dated October 14, <br /> 1996, requesting permission to conduct a five day vapor extraction pilot study at theabove- <br /> referenced site. <br /> In a telephone discussion on October 14, 1996, you informed us that your office does not <br /> normally allow units with capacities greater than 100 CFM to be used in pilot studies. EAI <br /> requests your office to waive that requirement and allow us to use a 250 CFM unit during this <br /> pilot study as indicated in our application form. <br /> EAI makes this request due to our past experience that by using a smaller unit in the pilot <br /> study than the one that may be used during the actual remediation program, there is bias <br /> towards over designing the final remediation system, resulting in significant cost in equi ment <br /> and utilities, often without any direct benefit to our client. If you so require, EAI cans bruit <br /> additional information regarding the particular unit that we will use (including the treatment <br /> efficiency of the unit), the concentrations and extent of hydrocarbons present in the soil and <br /> ground water, and any other data necessary to allow use of a 250 CFM unit. <br /> We hope this provides the information needed for you to allow EAI to use a 250 CF1V); unit <br /> during the proposed pilot study. Please call me at 714/632-8521, extension 240 or Steve <br /> Bright at extension 224 if you have any questions or need additional information. <br /> Sincerely, <br /> ENVIRONnnME�NTAL AUDaIT, INC. J <br /> Wallid M. Kazi, Ph.D., R.G. <br /> Principal Geologist <br /> WMK:SAB:sh <br /> PLANNING, ENVIRONMENTAL ANALYSES AND <br /> HAZARDOUS SUBSTANCES MANAGEMENT AND REMEDIATION <br />