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4701 Sisk Road,Suite 102 <br /> PROVOST& Modesto, 9)$09-9320 <br /> (2 <br /> Phone(209)809-2300 <br /> P R I TC H A R D Fax(209)809-2290 <br /> vnvw.ppeng.com <br /> M Employee Own Company <br /> March 11,2013 <br /> San Joaquin County Environmental Health Department <br /> 1868 East Hazelton Avenue <br /> Stockton,CA 95205 <br /> ATTN:Mr. Mike Escotto, REHS <br /> RE: Surface and Subsurface Contamination Report: <br /> Mr.Tony Faria,F&L Family Trust, Faria Farms,Faria Dairy <br /> Reference is made to the Surface and Subsurface Contamination Report conducted for Mr.Tony Faria. The SJCEHD <br /> has requested an Addendum to this Report addressing the operation of the dairy. Specifically,the EHD is <br /> concerned with the manure generation at the dairy site and potential pollution from this source. <br /> Beginning with the dairy holding pond,nitrate contamination of underlying groundwater from pond manure is <br /> extremely unlikely due to the fact that non-aerated dairy ponds are anaerobic. Without sufficient oxygen, <br /> nitrification cannot occur,which would lead to the formation of nitrate molecules. Leakage from the pond is <br /> unknown,but it has been documented In the scientific literature that dairy holding ponds are self-sealing by <br /> manure particles that become entrapped within the soil pore spaces. <br /> The Faria Dairy cropland receives both liquid and solid manure generated by the dairy facility. It is my <br /> understanding that Mr. Faria owns sufficient acreage to accept all of the liquid and solid manure produced by the <br /> dairy. The dairy is under the Regional Water Quality Board General Order. It is my understanding that the facility <br /> was inspected by staff from the Regional Board late last year and was found to be in compliance with all of the <br /> General Order requirements. Additionally, Innovative Ag Services, Inc.of Tulare,CA conducts inspections, <br /> monitoring,testing and files reports on the nutritional analysis of the Faria cropland to ensure that it is not being <br /> overloaded with nutrients. The Regional Board inspection concludes that the Faria Dairy is in compliance. <br /> Consequently, based on these inspections,it is my professional opinion that the dairy manure poses no threat to <br /> the underlying groundwater. <br /> I trust this information is sufficient for the requested Addendum. Please contact the undersigned if there should <br /> be any questions. <br /> Respectfully submitted, <br /> PROVOST&PRITCHARD CONSULTING GROUP <br /> �OQpOFESSIO� <br /> CHFSyt(Fy�m <br /> ¢ No. 75,479 <br /> . l <br /> 9rF C P'oF / <br /> DATE SIGNED 3 / 13 <br /> Don Chesney, PE <br /> Engineering•Surveying•Planning•Environmental•GIS•Construction Services•Hydrogeology•Consulting <br /> Fresno•Bakersfield•Visalia•Clovis•Modesto•Los Banos <br />