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1. INTRODUCTION This report issues our findings regarding the Nitrate Loading Study conducted for the existing Gurudawara Gur Nanak Parkash Temple in Tracy, CA. This study is required by the San Joaquin County Environmental Health Department(PHS-EHD) and complies with the San Joaquin County Development Title, specifically Section 9-1105.2(d). The Soil Suitability Study for this project has been completed and submitted by Mr. Walter Curtis. The findings of the Soil Suitability Study have been included in this report to facilitate review, since the Soil Suitability findings are applicable to the Nitrate Loading Study and the septic system design parameters. Preliminary information to complete these studies was provided by Mr. Paul Bagha, who is assisting the Temple with completing these investigative requirements. The site is located at 16101 West Grant Line Road,west of Byron Road. The APN is 209-190-16 and the project is composed of approximately 10 acres. The purpose of this report is threefold: First,the operation of the existing septic system for the Temple has been evaluated from this Study and the findings of the Soil Suitability Study. Secondly,the project has been assessed for current nitrate impact to the groundwater originating from the on-site waste disposal system. Thirdly, this report specifics a mound system to manage septic effluent which complies with the standards and requirements of the Environmental Health Department to mitigate environmental impact. There are currently two separate septic systems on-site. One system serves the Priest's residence and the other system serves the Temple facility. It is our understanding the septic system for the Temple facility was installed in August 1998. Date of initial use of the system is unknown; however, on April 12, 1999 the three lids on each of the three 2000 gallon tanks were removed. This was done for inspection by a representative of the County Environmental Health Department. From direct observation, the tanks have been in use for an indeterminable time, but at least for five months based upon the thickness of the scum layer in the first tank. After cutting the effluent tightline under Health Department requirements, backup of septic effluent was observed. Effluent was flowing to the leachlines, but as referenced in the Soil Suitability Study and this study, the indigenous clay soils do not allow adequate effluent management by percolation. II. SOIL SUITABILITY STUDY FINDINGS The Soil Suitability Study for this project was conducted by Mr. Curtis on February 19, 1999. The parameters investigated in Mr. Curtis' report include the project description, soil characteristics, file review and percolation testing. The primary issues with this project revolve around the soil structure and the depth to groundwater. Percolation test results confirm the on- site soil characteristics the be tight, organic clay. The following Sections discuss our findings which also correlate with Mr. Curtis' findings. 1 Valley Ag*search