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SOIL SUITABILITY STUDY / NITRATE LOADING STUDY <br />12172 N HIBBARD 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 ..................................................... 5 <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 ......................................................................... 6 <br />5.4.1 Quantity and Quality of Domestic Wastewater from Proposed Project.............. 6 <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 ..................................................... 9 <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 Log .................................................................................................... 10 <br />8.2 Percolation Test Procedure ................................................................................... 11 <br />8.3 Percolation Test Form and Results ......................................................................... 11 <br />9.0 SOIL SUITABILITY STUDY CONCLUSIONS .............................................................................................. 12