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I. INTRODUCTION <br /> This Report issues my findings regarding the Nitrate Loading and Soil Suitability Studies <br /> completed for the operational Robertson's Ready Mix facility located at the address referenced on <br /> the Title Page. These Studies were completed to examine the underlying soil structure and <br /> characteristics to determine the suitability of an on-site wastewater treatment(septic) system. The <br /> Studies also provide the San Joaquin County Environmental Health Department(EHD) with their <br /> required information. This report complies with San Joaquin County Development Title, Section <br /> 9-1105.2(d). Mr. Rick Edmondson,the project manager for Robertson's, has provided the <br /> preliminary information to complete these Studies. <br /> Currently,portable toilets are used on the facility. A new, modular Men's/Women's Restroom is <br /> proposed to be installed near the southeast corner of the property. Influent will flow into a new <br /> 2,000 gallon septic tank to be discharged through a conventional leachline trench leachfield. <br /> Within the text of this Report, Bolded Section (§) numbers are referenced at the beginning of an <br /> applicable Paragraph(s), or Appendices that correspond with the EHD Requirements Checklist. <br /> Section Numbers referenced as SSS§, are sections applicable for the Soil Suitability Study <br /> Requirements Checklist. Section Numbers referenced as NLS§, are sections applicable for the <br /> Nitrate Loading Study Requirements Checklist. Other portions of text may also apply to other <br /> sections of the Checklists, but may not necessarily be referenced. <br /> NLS§2.3, SSS§3.1. The subject property is located on the east side of Interstate 5 and Harlan <br /> Road, at the south end of the town of French Camp. There are no municipal sewer and/or <br /> stormwater management services; however, City of Stockton water service is available and <br /> currently serves the facility. Consequently, the property must have its own septic system and on- <br /> site stormwater retention system. It will be a number of years before wastewater and stormwater <br /> management services become available in this locale. <br /> SSS§ 1.1, 1.2. The APN, District Viewer and Aerial photo in Appendix A illustrates the layout of <br /> the property. The SJC District Viewer Map indicates the subject Parcel is 11.07 acres. However, <br /> Robertson's present land use of the property only encompasses 4.82 acres of this 11.07 acres and is <br /> delineated in an aerial photo found in Appendix F. This reduction in area has been factored into <br /> the nitrate loading calculations. <br /> The percolation testing protocol has found the indigenous soils under the proposed conventional <br /> leachfield disposal area to contain a sandy loam(fine sandy silt with 6%clay) in the shallow 0 ft- <br /> 4 ft soils, with increasing clay content with increasing depth to a silt loam(clayey silt with 22% <br /> clay) soil material. Soil at the 36" depth possesses a rapid permeability, with a slow permeability <br /> at the 96" depth. It is to be noted that the proposed leachfield area was over-excavated one-to-two <br /> ft when Robertson's moved onto the site. This material was stockpiled directly to the east of this <br /> disposal area and will be replaced to its original location before leachfield construction. It is my <br /> professional opinion this volume of this soil to be replaced will have no bearing on the operation of <br /> the future leachfield since it will be higher in elevation than the soil-effluent interface. <br /> Page 4- <br /> Chesney Consulting <br />