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INTRODUCTION This Report issues my findings regarding the Soil Suitability/Nitrate Loading Studies and the onsite wastewater treatment system (OWTS) design parameters completed for The Wine Group (TWG) winery facility. These Studies and OWTS design parameters were required by the San Joaquin County Environmental Health Department(EHD). To adequately assess the requirements needed to design the treatment system,these Studies examined the underlying soil structure and characteristics to determine the suitability of the domestic (non winery waste) effluent receiving soils. The industrial winery waste is managed under permit from the Central Valley Regional Water Quality Control Board. Mr. Eric Ray is Senior Project Engineer for TWG winery. He has provided the preliminary information to complete these Studies and has provided complete drawings of the current winery facility layout and the construction of the proposed effluent management system. This report complies with San Joaquin County Development Title, Section 9-1105.2(d). The winery recently underwent a Lot Line Adjustment Application that was approved by the San Joaquin County Community Development Department on April 7, 2021. The winery facility originally consisted of three separate Parcels: 245-060-29, 30 and 31. Parcels 29 and 30 and a portion of Parcel 31 were combined to form a designated Parcel 1, containing 149.51 acres. A designated Parcel 2 now contains 53.22 acres, which the majority of area was Parcel 31. The APN map and District Viewer maps for the original Parcels are found in Appendix A. These maps have not been updated by the Assessors' Office as of the date of this report. The entire domestic wastewater volume originates on Parcel 1. The winery proposes to have all septic tank effluent sources(except for three standalone locations), be partially-full pipelined to a primary disposal area directly south of the tank farms, and directly east of the stormwater retention (infiltration)basin. Within the text of this Report, Bolded Section (§)numbers are indicated at the beginning of an applicable Paragraph(s), or Appendices that correspond with the EHD Requirements Checklist. Section Numbers referenced as SSS§, are sections applicable for the Soil Suitability Study Requirements Checklist. Section Numbers referenced as NLS§, are sections applicable for the Nitrate Loading Study Requirements Checklist. Other portions of text may also apply to other sections of the Checklists, but may not necessarily be referenced. NLS§2.3, SSS§3.1. The subject property is located on the south side of State Route 120, east of Murphy Road, and approximately six miles east of the town of Manteca. There are no municipal water, sewer or stormwater management services that serve this area. Consequently,the winery has its own existing OWTS septic system, domestic wells, and on-site stormwater management system. The winery's domestic water supply operates under a Small Public Water System and is therefore monitored by EHD. It will be decades, if ever, before municipal water and wastewater management services become available to this locale. i i Page -1- Chesney Consulting