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REEVE TRUCKING <br /> Page No. 5 <br /> 1) n-the Appendix-The-test hole was-I.'ogged by an eng►neer and a description flf the_soi s <br /> encountered is contained in the,Appendix. Generally the soils consisted of layers of medium <br /> wed j,s- o <br /> stiff clay, cemented hard pan, stiff silty sand, stiff silty clay:-The test hole-(B�-1) was abandoned <br /> ,Cand back.filled-with auger:cuttings.-rA peculation test hole was drilled approximately 5 feet south <br /> i <br /> f—of the tes-boring-tb a depth of-7 feet:----� <br /> " A percolation test was performed and consisted of drilling a 7 foot deep by 4.5 inch <br /> diameter hole excavated with an auger "deep rock" drill rig. Two (2) inches of gravel was placed <br /> in the bottom and a 2 inch diameter perforated pipe was then placed in the hole and backfilled <br /> with "pea" gravel to about 3-feet above the bottom of the casing. The test hole was filled with <br /> water 24 hours prior to running the test. A 60 minute peculation test was witnessed by a county <br /> . , health official and the test data obtained is enclosed in the appendix. The calculated percolation <br /> rate has been adjusted to account for the gravel and pipe backfill. Calculations for adjustments <br /> } are on the test data sheet. <br /> A summary of the peculation test results: <br /> Diameter ofDepth of <br /> Test No. Hole (in.1 <Hole ft. Percolation Rate (min/in <br /> ¢ rB 17(5.—S.7)=4.5" 7.0 43 <br /> VII NITRATE LOADING STUDY <br /> �- A build up of nitrates in the upper ground-water zones can cause a temporary blood <br /> disorder in infants called methemoglobinemia(blue baby). Serious and occasionally fatal <br /> poisonings in infants have occurred following the ingestion of water containing nitrate <br /> concentrations greater than 10 mg/1 (nitrate-n) or 45 mg/1 nitrate as NO,. The units of nitrate are <br /> referred to in this report as nitrate-N with a maximum drinking water contaminate level of 10 <br /> mg/l. <br /> I' This analysis will evaluate the concentration of nitrate-N of effluent and rain water to the <br /> subsurface. The method is based on a simple mass balance formula which takes into account <br /> site denitrification, rain fall, and the proposed waste effluent. Assumptions and calculations for <br /> the analysis are contained on the attached Nitrate Loading Calculations sheet. <br /> ovla+ - <br /> > <br /> a <br />