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jKmems inc . 0 C T z 1 1993 <br /> Technology In Support of the Environment. <br /> October 14 , 1993 <br /> Anthony J . Mendez <br /> San Joaquin Valley Unified <br /> Air Pollution Control District <br /> Northern Regional Office <br /> 4230 Kierman Ave . , Suite 130 <br /> Modesto , CA 95356 <br /> Dear Mr . Mendez : <br /> Re : AUTHORITY TO CONSTRUCT PERMIT NO : N- 38 - 21 - 2 <br /> In response to referenced permit , we offer the following : <br /> Condition # 13 - <br /> The in hydrocarbon concentration and emissions from the VR <br /> Systems soil remediation equipment ( VR- 3 ) shall be measured three <br /> times a day for at least 15 minutes for each sampling , 2 days a <br /> week for the first month and weekly thereafter . <br /> Proposed new Condition # 13 - <br /> The influent hydrocarbon concentration and emissions from the VR <br /> Systems soil remediation equipment ( Model V3 ) . shall be measured <br /> daily for the first week of operation and once per week <br /> thereafter . <br /> Justification for change - <br /> A 15 minute sampling period may require specialized equipment <br /> normally employed by source test companies . A normal bag sample <br /> will require approximately 3 minutes to obtain . This should <br /> provide adequate time - averaging of the sample . <br /> It is economically impractical for sampling to be performed three <br /> times each day . In order to determine the variability at <br /> I <br /> i <br /> 1338 KNOLLWOOD CIRCLE • ANAHEIM, CALIFORNIA 92801 • TELEPHONE : (714) 826-0483 PAX: (714 ) 826-8746 <br />