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• Chemical Analysis and Mounding Analyses of the water table underlying the proposed filter bed location was not conducted. Groundwater was measured in the sounding of the on-site well at 20.5 ft below the top of the well casing. Consequently, chemical analysis of the underlying groundwater was obtained from this well. The underlying soil is sandy which makes the potential for a mound sufficient to affect the operation of the septic system virtually impossible. • During the course of the testing and calculations, it has been determined that the required 100% reserve/replacement areas can be situated in the proposed RV parking areas east and west of the proposed Office Building. • Although ultimate wastewater flow volumes emanating from the completed project are unknown, the average daily flow(ADF)volume was formulated using all available parameters acceptable to EHD. Average daily flow volumes of domestic sewage are expected to be comparatively small. • Pursuant to the request of EHD, information on the proposed treatment and disposal of RV exterior wash water through a leachfield has been included in this report and is found in Appendix G. in summary, the soils testing and investigation has found the indigenous soils under the proposed domestic wastewater disposal area to contain predominately fine-to-medium sandy soil with some silt in the upper horizons. The percolation rates obtained from the soil testing in the proposed disposal location reveal the soil to have very rapid perc rates which will preclude the use of native soil to be used directly under the Infiltrator Chambers. A loam soil type (i.e., sandy loam, silt loam, sandy clay loam, clay loam) must be imported to slow the percolation and achieve a higher degree of biological action on the effluent. A filter bed arrangement is proposed for effluent disposal with a pressure dose system to distribute the effluent over the disposal area equally. Current nitrate impact to the water table under the existing facility was found to be slightly above one-half of the Maximum Contaminant Level (MCL) at 27.8 ppm. The MCL for nitrate (as nitrate) is 45 ppm. Within the text of this Report, Bolded Section (§)numbers are referenced at the beginning of an applicable Paragraph or Paragraphs, Appendix or Table of Contents 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. II. SOIL SUITABILITY STUDY FINDINGS A. SUBJECT PROPERTY AND SURROUNDING STUDY AREA INFORMATION SSS§ I.I. Surrounding land use, particularly to the north, south, and east of the project is, and has been, in agricultural production for many decades. New development within the City limits of Manteca is occurring to the north of the project, and is projected to proceed east along the north side of Highway 120. As noted on the San Joaquin County Parcel Viewer Maps, the current surrounding land use is composed primarily of agricultural production land to the north, south and east. 2 Chesney Consulting