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To: Gooderham, Aaron [EHD] <agooderham@sigov.org> <br />Subject: RE: 285 Austin road <br />CAUTION: This email is originated from outside of the organization. Do not click links or open attachments unless you recognize the <br />sender and know the content is safe. <br />Good morning Aaron, <br />I have revised the nitrate loading scenario using the data from the spreadsheet you provided. The results is Nr = 16.02, <br />which is above the US EPA drinking water recommendation of 10 mg/L-N. What does this mean for the subject project <br />in terms of the County's approval or requirements for the new OWTS? <br />Stefanie Parman-Ribeiro <br />President <br />(209) 602-6569 Mobile <br />RgEp <br />BAEZ GEOTECHNICAL GROUP <br />From: Gooderham, Aaron [EHD] <agooderham@sigov.org> <br />Sent: Thursday, January 27, 2022 4:33 PM <br />To: Stefanie Parman <smp@baezgeotechnicalgroup.com> <br />Subject: RE: 285 Austin road <br />Hello Stefanie, please see the attached spread sheet, it was provided by Norman Hantzsche with Questa Consulting <br />(author of Predicting Ground -Water Nitrate -Nitrogen Impacts). <br />He has provided us with the average recharge from rainfall for each station in San Joaquin County. Please use the <br />"Manteca Station 70" data provided in the spreadsheet. Let me know if you have any questions, <br />Aaron Gooderham — REHS <br />Environmental Health Department — County of San Joaquin <br />Website: https://www.sigov.org/department/`envhealth/ <br />Main Line: (209) 468-3420 <br />From: Stefanie Parman <smp@baezgeotechnicalgroup.com> <br />Sent: Thursday, January 27, 2022 10:40 AM <br />To: Gooderham, Aaron [EHD] <agooderham@sigov.org> <br />Subject: RE: 285 Austin road <br />CAUTION: This email is originated from outside of the organization. Do not click links or open attachments unless you recognize the <br />sender and know the content is safe. <br />Good morning Aaron, <br />I can revise the long term nitrate loading scenario. What would you consider an acceptable recharge variable for use in <br />this calculation? <br />Stefanie Parman-Ribeiro <br />2 <br />