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denitrification, however, an average value of 25% reduction in the concentration of nitrogen in the surface <br /> soils has been used. <br /> Rainfall <br /> An annual rainfall value for this site was listed as 15 inches per year." 1z <br /> Nitrogen concentration of rainfall recharge <br /> This value incorporates the background nitrogen concentration in the local rainfall and shallow surface soils. <br /> Our research did not reveal any documentation of existing nitrate contamination in the local vicinity of this <br /> project. As such, a value of `0' has been used in this assessment. <br /> D. Conclusions <br /> Based on the processing of reasonable data into the Hantzsche-Finnemore model, we find that very little <br /> nitrogen content will reach the underlying groundwater. It appears that the nitrogen increase in the local <br /> groundwater beneath the parcel will be increase by approximately 0.42 mg/L. Based on an action standard <br /> of nitrogen levels exceeding the MCL of 10 mg/L, no pre-treatment of the wastewater is required for this site. <br /> u,ENTAI H\, <br /> ;NSC <br /> �m <br /> R��EJ#6 <br /> Exy. y i <br /> 11 NOAA Mean monthly, seasonal and annual pan evaporation for the united states, 1982 <br /> 12 CIMIS website <br /> Applied Wastewater Solutions, Inc. page 4 of 4 <br />