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if • Chemical Analysis and Mounding Analyses of the water table underlying the existing feachfield area were not conducted since the water table is at approximately 75 feet below grade. Chemical analysis of the underlying groundwater was obtained from the existing domestic well that provides water to the aforementioned structures. • During the course of the testing and calculations, it has been determined that the required 100% reserve/replacement areas can be situated in the open area to the north and west of the aforementioned buildings. This must be detailed on any future Site Plans. • 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. Nitrate Loading from this project upon its completion will be dependent upon water usage volume. Consequently,water usage by the entire Parcel must be closely monitored. In summary,the soils testing and investigation has found the indigenous soils under a potential domestic wastewater disposal area to contain predominately fine-to-medium sandy silty soil with some clay throughout the soil profile. Silt and clayey sand were particularly evident in the upper horizons,which were compacted. The percolation rate obtained from the soil testing reveal the soil possesses favorable pert rates at the deeper depths of 12 feet and 25 feet, and slower rates at the 42-inch depth representative of leachline trenches.. Current nitrate impact to the aquifers under the property was found to be a relatively low nitrate concentration of 18 ppm,which is low considering the agricultural production that has occurred on land surrounding the property. The MCL for nitrate(as nitrate) is 45 ppm. Dibromochloropropane (DBCP) is Below Detectable Levels(BDL). Witbin 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§ 1.1. SurrGundipgJgnd use,particularly to the north, south, and west of the project is, and has been, igricultural products for many decades. As noted on the San Joaquin County Parcel Viewer Ma the currents u ding land use is composed primarily of agricultural production € land to the north south and west (pasture) and east(livestock auction yard and pasture). SSS§ 3. ;te 3:3;3. , 3.59 3.6. Applications on microfiche file with the EHD reveal that there have be eit permi s issued for repairs/additions to existing systems within a one-half mile,radius surrounding project site. This is a high number of permits in t of San Joaquin County and can be attributed to the soil structure being composed mostly of layey silts long with the potential of inadequate systems that were originally installed. B. SOIL PHYSICAL CHARACTERISTICS AND ANALYTICAL TEST RESULTS 2 Chesney Consulting