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SOIL SUITABILITY STUDY / NITRATE LOADING STUDY <br />12958/12970 E JAHANT ROAD <br />TABLE OF CONTENTS <br />1.0 INTRODUCTION.......................................................................................................................................................1 <br />1.1 Description of Site............................................................................................... 2 <br />1.2 Proposed Development....................................................................................... 2 <br />2.0 PAST, PRESENT AND PROPOSED FUTURE USES....................................................................................2 <br />3.0 GEOLOGIC AND SOIL PROFILE INFORMATION.......................................................................................2 <br />3.1 Chemical and Physical Soil Properties.................................................................. 2 <br />3.2 Mass Transport Soil Properties........................................................................... 3 <br />4.0 GROUNDWATER INFORMATION....................................................................................................................3 <br />4.1 Groundwater Depth and Gradient........................................................................ 3 <br />4.2 Potential Groundwater Contamination Issues ...................................................... 4 <br />4.3 Water Sample Locations and Constituents............................................................ 4 <br />4.4 Current and Future On -Site Groundwater Uses ..................................................... 4 <br />5.0 SOURCES AND IMPACT OF NITRATE TO GROUNDWATER...............................................................5 <br />5.1 Current Off -Site Sources of Nitrate....................................................................... 5 <br />5.2 Contribution of Rainfall....................................................................................... 5 <br />5.3 Current On -Site Sources of Nitrate....................................................................... 5 <br />5.4 Future On -Site Sources of Nitrate......................................................................... 5 <br />5.4.1 Quantity and Quality of Domestic Wastewater from Proposed Project .............. 5 <br />5.4.2 Denitrification Estimate................................................................................. 7 <br />5.5 Nitrate Loading................................................................................................... 7 <br />5.6 Impact of Nitrate Loading to Nearby Water Sources .............................................. 7 <br />6.0 DISCUSSION OF NITRATE LOADING RESULTS........................................................................................8 <br />6.1 Total Nitrate Impact............................................................................................ 8 <br />6.2 Nitrate Loading - Methods of Mitigation............................................................... 8 <br />7.0 EXISTING AND PROPOSED SEPTIC TANK USAGE..................................................................................8 <br />7.1 Existing On -Site Septic Tank Usage, Permits and Repair History ............................ 8 <br />7.2 Expected Maximum Septic Tank Usage for Site ..................................................... 8 <br />7.3 General Area Septic Tank Usage, Permit, and Repair History ................................. 9 <br />8.0 PERCOLATION TEST INFORMATION.........................................................................................................10 <br />8.1 Soil Boring Logs...................................................................................................10 <br />8.2 Percolation Test Procedure...................................................................................11 <br />8.3 Percolation Test Form and Results.........................................................................11 <br />9.0 SOIL SUITABILITY STUDY CONCLUSIONS ........ <br />Petralogix Engineering, Inc. <br />26675 Bruella Road, Gait Ca 95632 <br />(209)-400-5729 <br />www.petralogix.com <br />.........12 <br />