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I. INTRODUCTION This Report issues my findings regarding the Nitrate Loading and Soil Suitability Studies completed for the proposed Delta Charter School project, referenced on the Title Page. These studies were required by the San Joaquin County Environmental Health Department (EHD), based on the construction of this new school facility as part of the New Jerusalem School District. These Studies were completed to examine the underlying soil structure and characteristics to determine the suitability of the proposed On-site Wastewater Treatment System (OWTS) correlated with nitrate loading potential. This report complies with San Joaquin County Development Title, Section 9-1105.2(d). The following people and firms are an integral part of this development: Mr. David Thoming is the Superintendent of the New Jerusalem Elementary School District and the facilitator of this project. Mr. Ed Ramans is the general contractor and owner of ESR Construction, Inc. Lawrence Engineering Group of Fresno are the design engineers, including the design of the OWTS for this project, and Modus Systems, Inc. are the suppliers of the portable classrooms. Mr. Ramans has provided the preliminary information to complete these Studies and has complete drawings of the proposed facility layout and the installment of the portable classrooms. Within the text of this Report, Bolded Section (§) numbers are referenced 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 west side of Koster Road, approximately 950 ft north of the intersection of Koster Road and Durham Ferry Road. There are no municipal water, sewer or stormwater management services in this locale. Consequently,the proposed school must have its own OWTS, domestic public well, and on-site stormwater retention system. A new public well for the facility is currently undergoing the permitting process. Onsite stormwater retention will be managed by subterranean chambers. It will be decades, if ever, before municipal water and wastewater management services become available to this area of south Tracy. SSS§ 1.1, 1.2. The subject property is composed of APNs 255-310-40 and 255-310-19. Parcel 19 was recently purchased by the School District to allow for a convenient exit from the school grounds. The soil sampling and texture analysis has found the indigenous soils under the proposed leachfield area to contain a clay, clay loam and silty clay in the shallow 3.5 ft deep soils. Backhoe test pit soil samples and texture analysis determined clay loam and loam in the deeper soils. As has been observed for decades, Tracy area clay soils have a surprisingly rapid permeability, as was observed by the perc test results. Page -1- Chesney Consulting