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I. INTRODUCTION This report issues our findings regarding the Nitrate Loading Study and Soil Suitability Study for the proposed T.G.S. Transportation Facility. These studies are required by the San Joaquin County Department of Environmental Health(PHS-EHD) and comply with the San Joaquin County Development Title, specifically Section 9-1105.2(d). Mr. Timothy G. Schnieder of TGS Trucking is the owner of the project. Preliminary information to complete these studies was provided by Wong Engineers, Inc. The site is located east of Interstate 5, at 10720 South Harlan Road which is the frontage road to Interstate 5. The APN is 193-270-16 and the project is composed of 8.13 acres. The project site will be used as a semi-trailer storage and transfer facility. It is important to recognize that there are currently no plans to install a septic system for this — facility, as one already exists. There is an existing residential structure at the entrance to the site and this septic system will be used by the guard stationed at the guard shack and by one office employee. In accordance with County and State codes, drivers who drop, or pick up trailers must also have access to this toilet. The purpose of this report is threefold: First,the proposed facility has been evaluated for operation of the present septic system and the possible installation of a future system through the findings of the Soil Suitability Study. Secondly,the project has been assessed for current nitrate _ impact to the environment originating from the on-site waste disposal system and from possible future systems. And third, this report specifies a septic system which has been designed to mitigate environmental impact and provide groundwater protection based on contemporary scientific studies. II. SOIL SUITABILITY STUDY FINDINGS A. SUBJECT PROPERTY AND SURROUNDING STUDY AREA INFORMATION The land for the facility and surrounding land use was previously in agricultural production. This is evidenced by the United States Department of Agriculture (USDA) Soil Maps for San Joaquin County. The surrounding land use is composed of commercial operations to the south and north, residential to the east, industrial to the south and agricultural to the west. Applications on file with the Environmental Health Department reveal 16 permits have been issued for repairs/additions to existing systems in the one-half mile study area. Copies of these permits can be found in the appendix. Sixteen permits in this study area can be regarded as excessive, considering the relatively sandy soil. Explanations for these repairs/additions may be that installed systems were under-designed, although it is most likely the leachlines were placed above the hardpan strata which exists in this locale. 1 Vafley Aq Pfsearck