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I. INTRODUCTION This report issues my design parameters concerning nitrate loading mitigation measures for the project referenced on the Title Page. This report was required because of new regulations enacted by the San Joaquin County Environmental Health Department(EHD)to ensure nitrate loading standards would not be exceeded when new improvements occur on a subject Parcel. Specifically, concerns regarding nitrate loading could potentially occur when primary, or second unit dwellings are constructed on comparatively small parcels. The subject Parcel exceeds the nitrate loading standards as determined in a report produced by Live Oak Geo Environmental, Inc., Project No. 1835. Mr. Radrigan is proposing to construct a single family residence(SFR)on the subject property that he owns at 26451 North Sacramento Blvd. (APN 001-200-12, 0.31 Acres). He also owns the southeast adjoining property at 26403 North Sacramento Blvd. (APN 001-200-11, 0.06 Acres). . County Service Area(CSA) 12 supplies stormwater management and domestic water for this project and for the town of Thornton. Consequently, no water well is involved with this project. Because of the need for nitrate loading mitigation, this project falls under Section 7 of the San Joaquin County Onsite Wastewater Treatment System Standards. Subsection 7.1 states that alternative treatment systems are standard systems with additional enhancements above the required minimum to augment the treatment capabilities of the system that must be designed by a California registered civil engineer. The following summarizes the investigative parameters included to complete this report: • Soil testing was conducted on a soil sample retrieved from the percolation test boring conducted adjacent to the proposed leachfield area. Physical testing of the soil sample included texture particle size analysis for sand, silt and clay content, and chemical testing analyses for the constituents that influence nitrate loading. An assessment of the characteristics of the on-site soils was made to discuss the mitigation of nitrate impact. • The septic system plans have already been drawn with the assistance from EHD personnel in determining total leachline length and orientation. EH personneli no address e 100%replacement area. The attached septic system plans illustrate both the primary and replacement areas, which has been drawn in red ink. The primary trenches, which will contain Infiltrator Chambers, has already been excavated. II. SOIL INFORMATION The nitrate loading Study completed for this project by Live Oak Geo Environmental did not conduct physical and chemical testing on the proposed disposal area soil. The following information discusses important soil parameters that affect nitrate loading of the soil and potentially to the underlying groundwater. Page 1 of 13 Chesney Consulting