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QUARTAROLI & ASSOCIATES <br /> LAND SURVEYING • LAND PLANNING <br /> RECEIVED <br /> June 19, 2019 JUN 2 1 2019 Job No 2019-27 <br /> San Joaquin County ENVIRONMENTAL HEALTH <br /> Environmental Health Department I)I:PAR"ITIENT <br /> 1868 East Hazelton Avenue <br /> Stockton, CA 95205 <br /> Attn.: Linda Turkatte, Director <br /> Re: Discussion of Previous Nitrate Loading Study & Current Use Numbers <br /> American Crane, Inc. <br /> 17800 South Comconex Road <br /> Manteca, CA 95336 <br /> APN 208-180-23 <br /> Use Permit Application PA-1900030 (UP) <br /> Dear Ms. Turkatte, <br /> As per our phone conversation on 6/18/19 please review the attached document <br /> prepared by Live Oak Geo Environmental, Inc. on "Plan Check — 2 Hour Basis". The <br /> purpose of this review is to establish that the current project as proposed on PA-00030 is <br /> less impactful than as described in the approved Soil Suitability/Nitrate Loading Study <br /> prepared by Provost & Pritchard, dated July 16, 2012. <br /> Based on the method and assumptions described, the result of the nitrate loading <br /> estimate indicates that the existing and proposed development on the Site should not <br /> cause a buildup of nitrate in the aquifer above 10 mg/L-N. <br /> Furthermore, a side-by-side comparison of the numbers utilized in the current and 2012 <br /> calculations shows that the conditions have improved since the original report was <br /> written: 8.42 acres area in 2012 versus 11.80 acres currently, 33 or 38 employees in <br /> 2012 versus 30 on-site employees currently, a calculated 345.8 gpd wastewater flow in <br /> 2012 versus 221.4 gpd currently. <br /> Based on the increase in acreage and the decrease in calculated wastewater generated <br /> since the 2012 report, combined with the favorable result on the nitrate loading <br /> calculation using the current methodology, there appears to be no need for completion of <br /> a full, new Soil Suitability/Nitrate Loading Study. <br /> Sincerely, <br /> J Glick <br /> Quartaroli&Associates, Inc. 2019 All rights reserved <br /> 310 Sun West Place Suite A • Manteca, California • 95337 • 209/239-4908 • Fax 209/239-6235 <br />