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I. INTRODUCTION This report issues the findings for the Nitrate Loading Study and Soil Suitability Study completed for the subject property and project under examination,located at 916 West Frewert Road near Lathrop, California. The purpose of these Studies is to provide the San Joaquin County Environmental Health Department(EHD)with the required information pertaining to the soil and groundwater in relation to nitrate loading potential from the future on-site domestic wastewater disposal system. These studies comply with San Joaquin County Development Title, Section 9-1105.2(d). Ms. Linda Novick and Mr.Jed Phelps,both of Harvest Power,Inc.provided the preliminary information to complete these Studies. 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. NLS§ 2.3,SSS§3.1. /The subject property is located near the Lathrop Planning Area/sphere of influence. The city of Lathrop sewer facilities has not yet expanded to this area, although they will eventually. This time frame is presently unknown,but could be decades.rce;the rp water for the entire subject property, which consists of 31.4 acres,will be provided by an exisit domestic well. Domestic wastewater dispos will be managed by an on-site septic system,hnecessity ofthese Studies. SS�. The project currently consists of the Harvest Power, Inc. Composting Facility. The Use Permit Applic on and related information are found in Appendix A. It is proposed to move anew modular offrc uilding with a men's and a women's restroom on-site. An existing small modular building with a / unisex restroom will remain. This unisex restroom is currently connected to a holding tank that is periodically pumped out. The unisex restroom will be permanently closed when the new modular building is moved on-site. The following is a summarization of the information collected to complete these Studies and fulfill the requirements of EHD. Wastewater system operational parameters are also discussed within this report to supply additional information to EHD: • The primary disposal area and the required 100%reserve/replacement/addition areas have been described and are illustrated on the Site Plan produced by 4 Creeks Engineering of Visalia,CA. • The on-site soils were analyzed for the ability to accept future wastewater effluent flows and to assess their characteristics in the proposed leachfield area to mitigate nitrate impact. This was accomplished by soil physical and chemical testing. Physical testing consisted of percolation testing. Chemical testing included analyses for the constituents that influence nitrate loading. • Depth to the water table was directly determined by hand drilling and found tp lie 6.75 ft below existing grade.The water table depth was subsequently observed by EHD sanitarian Ted Tasiopoulos,REHS. The saturated zone of the test boring was backfilled with bentonite pellets. • Since the volume of wastewater is anticipated to be very low from the project,Mounding Analyses of the water table underlying the proposed disposal area was not calculated for this project. • The Nitrate Loading calculations and wastewater disposal system operational parameters were formulated from the San Joaquin County Environmental Health Department Sewage Standards. 1