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4 <br /> JAMES D ROBINSON, PE, CEG Page 2 <br /> March 23, 2010 <br /> fill <br /> Project Number 2010-1015 <br /> NITRATE LOADING STUDY <br /> TABLE OF CONTENTS <br /> 1 CHEMICAL AND PHYSICAL PROPERTIES OF THE SOIL.................................................3 <br /> Description of Chemical and Physical_Properties of the Soils. . .3 <br /> SiteMap....................................................... _- - _ .3 <br /> Description of Soil Litholo 4 <br /> Discussion of Soil Litholo ...... ........ ........................... ............4 <br /> Mass Transport Properties of the Soils. .4 <br /> 2. GROUNDWATER ANALYSIS .4 <br /> Groundwater Information. ....................4 <br /> DescriMion Of The Depth And Gradient Of Groundwater In The Area. .4 <br /> Ground Water Contamination Issues in the Area.................. ...5 <br /> f Current and Future Groundwater Uses.......................................................................................5 <br /> 3. SOURCES AND CALCULATED IMPACT OF NITRATE TO GROUNDWATER...............5 <br /> Current Off-site Sources of Nitrate....................................... ............................:........................5 <br /> Rainfall Contribution.............................................................. ..5 <br /> Current On-site Sources of Nitrate..............................................................................................6 <br /> Future On-site Sources of Nitrate. .6 <br /> Mass Balance of Nitro en Loading. ................................................__ ____ .6 j <br /> ' <br /> Impact of Nitrogen Loading .7 <br /> ............................... ... <br /> 4. DISCUSSION OF NITRATE LOADING RESULTS ..............7 <br /> Total Nitrate Impact. .. _ _..7 j <br /> Mitigation methods. .. __-.............................8 <br /> 5. CONCLUSIONS AND RECOMMENDATIONS......................................................................8 <br /> FlProfessional Signature. -__ _ •8 <br /> 6. LIMITATIONS. .8 <br /> User Reliance. .9 <br /> 1 + <br /> APPENDIX <br /> �-i <br /> t <br /> I <br /> F. <br /> JAMES D ROBINSON,PE,CEG ENVIRONMENTAL•ENGINEERING-GEOLOGY <br /> PO BOX 1744,VALLEY SPRINGS,CA 95252 PHONE(209)642-5445,FAX(249)740A303 <br />