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" SANAOAQUIN a <br /> ° .c°� Environmental Health Department <br /> � , <br /> COUNTY Jasjit Kang, REHS, Director <br /> cgiroa��P Greatness grows here. Muniappa Naidu,REHS,Assistant Director <br /> 1 <br /> PROGRAM COORDINATORS <br /> Robert McClellon, REHS <br /> Jeff Carruesco, REHS, RDI <br /> Willy Ng, REHS <br /> Michael Kith, REHS <br /> Melissa Nissim, REHS <br /> October 29, 2021 <br /> Angiotheutics, LLC / California Northstate University <br /> 6041 Grant Ave. <br /> Carmichael, CA 95608 <br /> RE: Soil Suitability/Nitrate Loading Study <br /> 26201 N. Thornton Rd. <br /> APN 001 190-66, SR0084415 <br /> The San Joaquin County Environmental Health Department (EHD) has reviewed the Soil Suitability/Nitrate <br /> Loading (SSNL) Study, dated May 19, 2021 for the above noted location, and has the following comments for <br /> your consideration. <br /> The SSNL was prepared to determine the suitability of the above noted parcel for onsite wastewater treatment <br /> system (OWTS) usage and the potential long-term impact of nitrate to groundwater from the proposed startup <br /> research facility (as stated in the Service Request SR0084415). The SSNL Section 9.3 referenced 3 existing <br /> residential homes totaling 6 bedrooms, and Section 9.4 referenced future research facility with a maximum of <br /> 6 full-time employees. Both sources were taken into account in Section 9.4 and 9.6 the mass-balance <br /> calculation. <br /> The applicant stated intention to remove the residential homes as a part of this project during a telephone <br /> conversation on October 29, 2021. Noland use permit for the"Research and Laboratory Business" is required <br /> according to Community Development Department. <br /> Based on the information provided, the EHD can make the following findings: <br /> 1. A commercial septic system typical loads total nitrogen from wastewater of 85 mg/L-N. However, the <br /> SSNL uses 34.425 mg/L-N to determine potential nitrate loading from proposed improvements. <br /> Submit an addendum to EHD addressing above-mentioned concerns and provide any supportive documents. <br /> The EHD will respond after the addendum has been submitted accordingly. <br /> If you have any questions please contact Jeffrey Wong, Lead Senior Registered Environmental Health <br /> Specialist, at jwong@sjgov.org or (209) 468-0035. <br /> /*Y- UV <br /> {so - `-� <br /> Steven Shih, REHS <br /> Program Coordinator <br /> c: Brian Millman W. Millman, AdvancedGeo, Inc. (bmillman@advancedgeo.biz) <br /> son VW WW% <br /> 1868 E. Hazelton Avenue I Stockton, California 95205 1 T 209 468-3420 1 F 209 464-0138 1 www.sjgov.org/ehd <br />