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v sNEIL O. ANDERSON & ASSOCIATES, INC. <br /> 0� GEOTECHNICAL-ENVIRONMENTAL-GROUNDWATER-INSPECTIONS•TESTING•LABORATORY SERVICES <br /> D 41 <br /> WEBSITE: www,noanderson.com CORPORATE OFFICE SACRAMENTO OFFICE <br /> EMAIL: noa@noanderson.com 22 Houston Lane 4221 Nocthgate Boulevard,Suite 6 <br /> G ti CIQCO: (530)891-6304 Lodl,California 95240-2405 Sacramento,California 95634-1227 <br /> 4S S OGAP STOCKTON: (209)472-1091 (209)367-3701 (916)929-9267 <br /> RANCHO CORDOVA: (916)631-4455 .FAX:(209)333-8303 FAX:(916)929-9269 <br /> July 15, 2003 <br /> Mr. Jadi Singh <br /> 96 Mission Ridge Court <br /> Fremont, California 94539 <br /> Subject: Addendum,Nitrate Loading Study (PA02-247) <br /> Proposed Gasoline Station/Convenience Store <br /> 26485 North Thornton Road, Thornton, California <br /> Dear Mr. Singh, <br /> Per your request, this letter provides a revised nitrate loading calculation for the proposed <br /> facility. We understand from Bernie Deits, the system should be sized for 4,500 gallons per day, <br /> average daily flow. Therefore,revised disposal area recommendations are provided as well. <br /> Please refer to our Soil Suitability and Sewage System Feasibility Study dated January 24, 2003 <br /> and the Nitrate Loading Study dated February 12, 2003 for other project details and description <br /> regarding the nitrate loading calculation. <br /> The following table presents the revised nitrate loading calculation based on 4,500 gallons per <br /> day, average daily flow: <br /> Table 1. <br /> Summary of Nitrate Mass Balance Analysis. <br /> 141 c <br /> rZ <br /> 4. <br /> a� <br /> , a+ <br /> Z <br /> C: ^ ^ <br /> Z d Q d Z U E '�a �i `C Z V <br /> 7.45 2.0 4,500 10 10 7.3 1.0 <br /> *Note:This is the average outflow treatment level of nitrate for the proposed MicroSepTec waste water treatment <br /> system. <br /> ?pE RSO <br /> r y <br /> ► n <br /> x W <br /> a � <br />