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K j j K JE L D S E N Stephen K. Sinnock, RE S S I N N O C K Christopher H. Neudeck. P.E. Neal T. Colwell, P.E. N N E U D E C K Barry O'Regan. P.E. inn. CIVIL ENGINEERS 8 I AND SURVEYORS 2414-0010 01-001 February H, 2020 Mr. Michael Kith mkith(2sicehd.com ®E C E I V E D REHS Program Coordinator 99�� Environmental Health Department San Joaquin County FEB ? Q 2020 1868 East Hazelton Avenue Stockton, CA 95205 ENVIRONMENTAL HEALTH Re: Grindstone Joe's Wastewater Holding Tank — SJC EHD Permitting Review PERMIT/SERVICE S Dear Mr. Kith, This letter, written on behalf of the Grindstone Joe Association (Association), is intended to provide additional detail as requested by the February 5, 2020 email correspondence with the San Joaquin County Environmental Health Department (SJC EHD). This correspondence is provided as attachment to this letter. The following addresses the information requested by the SJC EHD by each item. Item 1 states that "a holding tank system may be approved for existing developments on parcels that can no longer support an onsite wastewater treatment system (OWTS) disposal field, and can only be approved if the existing development has an existing permitted OWTS. According to EHD records, there are two OWTS and one holding tank on the parcel." We are providing an engineered design of a holding tank to replace existing holding tanks that were identified as not meeting County standards. The Notice and Order to Abate (NAO), Complaint ID: CO0048503, indicates that an engineer -designed sewage disposal (wastewater holding) system should be submitted for EHD approval. Since the site has very shallow groundwater and an on-site disposal system is not appropriate, the submitted engineer -designed wastewater holding tank is intended to replace the NAO referenced OWTSs and the holding tank at the site. Item 2 requests that the Association identify the permitted OWTS intended to be replaced on the plans, and to provide the justification for replacing the septic system with the holding tank. This holding tank is intended to replace all non -permitted OWTS on the island. This tank is only intended to service the restroom facilities and deck facilities, not the house boats. All other holding tanks will be removed by the Association. Item 3 states that the engineer -designed OWTS must contain all information listed in OWTS Standards Section 7.1. Since the proposed system, being presented consistent with the NAO, is a wastewater holding tank system, preparation of design requirements under Section 7.1 of the OWTS Standards are not applicable nor appropriate to this project. Instead, the holding tank has been designed and submitted including information required by OWTS Standards Section 10. Additionally, the submitted plans have been stamped by a civil engineer licensed in the State of California. Item 4 states that the proposed holding tank shall include information listed in OWTS Standards Section 10.1 to 10.8. The provided plans have been prepared to conform to OWTS Standards Section 10. Furthermore, the OWTS Standards Section 10.1 states that holding tanks may be approved for existing developments on parcels which can no longer support an OWTS disposal field that meets the requirements of the OWTS Standards, is no longer protective of ground and/or surface waters, or is a Corporate Office: 711 N Pershing Avenue I Stockton, CA 95203 1 209-946-0268 1 www.ksninc.com West Sacramento: 1550 Harbor Boulevard. Suite 212 1 West Sacramento, CA 95691 1916-403-5900