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FThis RODUCTION ssues my findings regarding the Nitrate Loading Study and Soil Suitability Study or the subject property and proposed project under examination, located at 12687 (12833) South Manthey Road in 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 proposed on- site wastewater disposal system. These studies comply with San Joaquin County Development Title, Section 9-1105.2(d). W. Tony Lopes, P.E. of Siegfried Engineering 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 in what is referred to as the City of Lathrop Sphere of Influence. City of Lathrop sewer facilities have not yet expanded to this ar-ems, ou t t ey eventually will. This time frame is presently unknown. Domestic water for the entire subject property, which consists of 34.7 acres, is provided by an on-site domestic well. Domestic wastewater disposal exclusively for the Blue Rhino facility will be Ediiaged by an on-site septic system. SSS§ 1.2. The proposed development of the applicable portion of the subject property will be occupied by the Blue Rhino company which refills propane gas cylinders for return and re- purchase at retail stores. It is my understanding there will be an Office Trailer with two office employees and 12 drivers. Currently,there are no improvements to the property, other than domestic water supply, fire suppression water supply, lighting, compacted aggregate base, and a non-operational water well in the NEC of the subject area. The total area to be exclusively occupied by the Blue Rhino facility is 2.0 acres. 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 project Site Plan produced by Siegfried Engineering. • The on-site soils were analyzed: 1.)For the ability to accept future wastewater effluent flows, and 2.)To assess the characteristics of the on-site soil in the proposed leachfield area to mitigate nitrate impact. This was accomplished by soil physical and chemical testing. Physical testing included percolation testing and particle size analysis of the soil characteristics. Chemical testing included analyses for the constituents that influence nitrate loading. 1 Chesney Consulting