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S.The amva of Figures I and 2 show the strong Conclusions
<br /> influence of If.rausfall recharge cornpnnee,on Its,easel. lir aru.dauon tel"Irate in the upper satur.t,,f
<br /> rant nitrate ndrogen correnuatinn.l he application of the rnse n is cumulative eUea of on-site sewage dhposal prat
<br /> methods presented us this papa and the.—able—,of tices which has int been ald—.d by standard sit Is and
<br /> the mulls am.therefore,limited b)the accuracy,with which denancnfena.This paperprssents acortvenetm method tot
<br /> the rainfall recharge traction can be estimated ordelermned elti.mung long-tont cnses in ground-warn nitrate-
<br /> by the user.Fir heal results,the user should perfuse"a nitrogen caused by no site sewage dsspowd I he method I,
<br /> thorough warn balance analyses using techniques nth as is,fil In practicing engine—and regulatory agent rs fur
<br /> thou developed by the 11.S.D..A.Soil Cmnurvatton Service the general planning and evaluation of residential devrdup-
<br /> (196)or dhsanthwaite said Mather(1955),ter the,into,. snmm wellasfm thesiteapecsficdesignufulrrilesewaser
<br /> maxon hayed on Ireel ttdles deposal system On,n evidensrd by their adoption m
<br /> pans of Ci life rma.
<br /> Planning Applications the greatest putemial for ground-water nitrate-nitrogen
<br /> the mime rose soi procxduses outlined in this problems arises In arra of low rainfall recharge and high
<br /> paper may have a number of bud use and environmental development de,tity.Int situation may be critical d local
<br /> planning applicata+m A principal advantage i the minimal st outd waters are used for domestic water supply.Existing
<br /> reyuhemsnt for data communities ami cluster developments using large,com.
<br /> mon rptic tank disposal fields are also likely In be rr
<br /> Zoning and Subdig/sion Propoaafs ugnifeant con ern because of the high concentration oi
<br /> Prelivtuwp evaluatmn of putentul..It,quality waste-Ater dufuwal in a limited area In newt,level
<br /> impacu susefulwhrnii:aal useplamtingdeeisiorei mcrxv nwndarmv space nquircnesa.s fur roads,buildings,
<br /> tieing made.Compulaton of A or use of Figure 2 can open spa".etc.. Alwuntelmes kapthetwnallintemdyul
<br /> p,-idc xxii basis For determining appropriate devnlnp- development and wane water application below critical
<br /> men[demazs to amurr protection of anal ground-water kvth.
<br /> quality Comparison of predicted values with actual Feld
<br /> Rntdental subdnwoo proposals can he screened for sampling data to,wend eau study[-ations in California
<br /> potential long-term nitrate Impacts by applying equations eonfums that lht methal,prswWc reasonable fust approa
<br /> (d)and 121 The Nonh Coat Regional Water Quality nmatiuns of natatc-mtrogcn cifecss in ground water from
<br /> Control &mrd of California and several meal health sepliciank dimpnsalficil he agreement"ween predicted
<br /> departments have adopted these pruned.—for it.pro. and observed valuestssuffickril wenahk pntnntialaresoof
<br /> pose.An uWlcation of no potentially caceuoe nitralt burl!- caste"to be deelifed,thus making the method an crf--
<br /> up in ground wafer according to the analyses presented in tive planning tool.
<br /> this paper would otniatc he reed for furi study.In the A p,onsi ing application of these nitrate lOwlan enc
<br /> even that preliminary,analvsea indicate possible problems procedures is,for regulatory purpnact 'Phe limned data
<br /> (t.g.,planned development density exceeds 1;A).further regmnmenu and straightforward computations make the
<br /> analyses might he styu,ted to deftnc the ground-water approach wuldy suilahlc fur culuaiit)n of inning and land
<br /> quem and potenral effcm more specifically.Ahso,mitiga. se plans,abdisnsnun proposah,..it continued devchip-
<br /> tion measures and grmmd-water monitoring requirements mens in unsewrrcd arca.The reed for mdngatmn meuurn,
<br /> may be formulated based on the.preliminary nitrate predic. long sant.ondonog,or marc detailed site m—tiga[nats
<br /> tions.Posatble mitigation mecum might include reducing can alae he readlh deicr.aed by use of stege procedures
<br /> development and.wage loading densities,mc.,poratmg
<br /> nitrogen rcm—I systems(Lanak,1982),ser muddying the Aekno9aNdgrrlanb
<br /> disposal site.kciamils os design Malkin N W.1979) Ibis paper wit developed from a study supported by
<br /> 91/YdOsA� lJ/r//lsI/od AAY United States Fnvuonatenal Praterion Agency Crani\o
<br /> Continued buildout of cenam cawing developssesn Pe09211(ontr10 l by California North Lout Regional Water
<br /> arias using ti-site sew age disposal systems may pose signs ljualny Conrn&+and finita"No 04)42-118.0cant long tc,m ground water nitrate consxmn. In caacs RaNnaneas
<br /> when development demny n approaching critical levee
<br /> predicted by equation 1?).then further analyse,of possible Aleaa.Jer,M 1465. him.fw,sin.m Smil Nittnacn W v
<br /> localized prmbkms and more complet-nalynf the grnuM- ganholwruw and F F Clark,eds.American Sonesy of
<br /> water system u wauamed (7sound.wate,rnumtaairrg may.
<br /> A,,—.y.101-my,Inv.Md—.W I Apanamy Serie.Nu to
<br /> PP Jp7-I..
<br /> be used m verify tht•carer quabtycorrn sit indicated by the sroadhnt.F.F..and F,Clark 1967 Deuimfficmm.Soil Niro-
<br /> predictive equations the preliminary analyses wing equa. gen W.Y.Ranholnracw sad F'.E.Mork,eds.Arnencan
<br /> times(1)and(2)prwak a rational basis for the design If Society ml Agrono.y.Inc.,MWisnn.WI Alts—in,
<br /> field m rmtormg programs.Specific mitigation measures, Serino No to pp.U4 159.
<br /> Including mudded deign saratarJs,might be appropriate CaLlomu Repand Water Quarry Cineol tfoard,Cenral Cast
<br /> liepun I('R W'Q('B)19x1.I.m lkm;Ray+oM Park sera
<br /> for any additional dk lnpmrnt that would tad to W. haute pba a ndnem Stitt Repos 75 pp.
<br /> .1,ed grown--,er quality problems loldorma kraieawlW'atrr Quality Control flard.('emralCmau
<br /> a9g
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