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../ ADDENDUM _ APN: 007-380-14, PA #04-393 Re: Ltr. EHD, dtd. 8-12-04, Sbj. Animal Waste/Nitrates At present, 8-30-04, eight horses are being boarded on the 20 acre parcel. After sale _ of the new parcel (Parcel 1) the buyer may or may not board animals. The resident (Mrs Veerkamp) may or may not board animals on Parcel 2. The FarWest Labs have sampled and tested the domestic well. The test report is included in this submittal. The results are within the Federal guidelines for potable water with respect to DBCP and NITRATES. (DBCP-<0.01) (Nitrate- 11.2) A study published by the USDA entitled Manure Nutrients Relative to the Capacity of Cropland and Pasture land to Assimilate Nutrients, issued Dec. 2000, was obtained and is referenced R-1 in this addendum. The USDA study, while nationwide, provides a general overview of the specific problem associated with the ability of the soil to assimilate nutrients. As stated in R-1, page 50, the amount of nutrients added to permanent pasture could be as high as 28 pounds/acre/year of nitrogen without accumulating excess nutrients. The owner (Mrs. Verkamp) stated they do not apply fertilizer. Thus the subject parcel, with no fertilizer added and only eight horses at present, has the ability to _ assimilate the nutrients added by excretion. Volatized nitrogen may be a problem downwind from large concentrations of AU (animal units). The R-1 study, page 58, states "of particular concern is Volatized nitrogen in the form of ammonia and ammonium. Deposition (both wet and dry) of airborne ammonia and ammonium has been shown in some studies to occur in close proximity to the source of emmision, _ sometimes within 100 meters and often within 10,000 meters". Treatment systems, such as lagoons and spray irrigation release nitrogen into the air exacerbating problems resulting from airborne deposition. The study, R-1, references one study, Asman, 1998, concerning this subject. San Joaquin County appears to have some soil with an assimilation capacity of 100- 140 pounds/acre/year of Nitrogen. (R-1, page 73). As previously stated the report deals in animal units, whether swine, poultry or cattle. Concentrations of animal 1. _