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Y <br /> 7. <br /> �o a It So . NEIL.., O. A�ERSON & ASSOCIATES, INC. <br /> ,I, GEOTECHNICAL•ENVIRONMENTAL .GROUNDWATER•INSPECTIONS•TESTING•LABORATORY SERVICES <br /> a ,�, CORPORATE OFFICE SACRAMENTO OFFICE <br /> -A w 22 Houston Lane 4229 Northgate Boulevard,Suite.'3 <br /> p h CHICO (530)891-[304 Lodi,Califbmia 95240 Sacramento,California 95834 <br /> qss O GAP STOC[CTON (209)473-1091 (209)367-370f (916)929-9267 <br /> RANCHO COR➢OVA (916)631-4455 FAR:(209)333-8303 FAX (916)929-9269 <br /> February 12, 2003 , <br /> 'Our Job No. LE02-481 <br /> Mr.Jadi Singh - <br /> 96 Mission Ridge Court <br /> Fremont,-California 94539 <br /> Subject: 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, our office has conducted a nitrate loading study for the proposed project. We <br /> understand from Mike Smith Engineering of Lodi California, that a nitrate loading study was ah ' . <br /> additional requireiment by San Joaquin County Environmental Health'Department(EHD) for project <br /> approval.'A soil suitability study and sewage disposal feasability study prepared by NOA (2003), dated <br /> January 24,.2003,was completed per the requirements of the use., The soil suitability.study and sewage <br /> disposal feasability study describes the proposed project,percolation tests, soil conditions, estimated <br /> waste water flow, and proposed package treatment system. <br /> Based on the results of the soil suitability study and sewage disposal feasability study, the site is suitable <br /> for the-proposed project provided that the assumptions discussed are correct and that the <br /> recommendations are followed.Please refer to the NOA(2003) soil,suitability study and sewage disposal <br /> feasability study for details not introduced in this report. The study indicated that an average daily flow <br /> of 3,000 gallons or less was determined (NOA, 2003). <br /> The engineered septic system selected for the project is a MicroSepTec treatment system. Mr. Burney <br /> Detes of the San Joaquin Company Inc:, Oakland, CA, is the MicroSepTec representative for the area. <br /> Mr. Detes has indicated that two (2) J500 gpd units could be installed in parallel to treat a maximum of . <br /> 3,000 gallons per day. The treated effluent will be disposed within a filter bed. M. <br /> The treatment level achieved by MicroSepTec systems is available for review on the following internet <br /> web page: http://www.microseptec.con/images/pdfs/publishedpapers/nsfpaper.pdf, page 8. According to <br /> the published information;the total nitrogen for the treatment system is about 10 mg/L-N total nitrogen. <br /> Microseptic indicates that the effluent water quality is typically less than 10 mg/L of CBOD5' <br /> (Carbonaceous Biochemical Oxygen Demand), less than 10 mg/L of TSS (Total Suspended Solids), and <br /> less than 10 mg/L of nitrate-nitrogen and TKN(Total Kjeldahl.Nitrogen). Contact information regarding <br /> the MicroSepTec System is provided in the following Table. .' <br />