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FRCM L.RSCs W-C SPNITG sgRSPRP SOS =5-+ C25S 1593 1?-?C ib l »CaO P 02zl" <br /> A Discrete Point-Interval Sampling DeAce <br /> TFsatrias w Kabis <br /> SIHAK Industries Limited, Inc- <br /> Las <br /> ncLas Vegas,Nevada Lir <br /> gradient as tests (Maltz et ai., 1986), plume <br /> deimeanon (Nixnlacs a al.. 1994), and id=tssactaon <br /> Rciative to standard Xm=dluater inonuonng of dzsL--= zonesof L21cry and v=n .= <br /> %veils, dis== point-inics-al samplers protide mpenor che=cal gradients aq <br /> data for dU=. smctstorwj repres+entnuon of 1991). A susnmarn of findings to these and oche: <br /> contaminant plumes. 'This approach often ambles pubiiaauons m eludes. <br /> evaitiauon of in srru auen=tian of cammn:snant - <br /> ��t grounde at Drs�--ate pont-enc ad tuonrtonng of end- <br /> piumes. A my dsc,=e point-tntsampler has be= (irmioped for mulls-level sampling nate: qualir is c=-cTc v-- rei=ve to neswd or <br /> under a tirade range of monttcnng =ndiuons and clusterd hails. <br /> monitoring =tegses. The sampling dmri= te=nt <br /> patented m the United Stat= is designed to cart~ Dis= :e potnt-tntertal 9==dti%`ater sampling <br /> samples vnLh srunimal disztiraan= from diets provides greater pre=en in evaluating the <br /> smpling zones, Tie design and srrrall star of the vertic i dmnbuuon and rang_ of conramanant <br /> s=1o1ing -devi= enables raoid depicn ment and =rt=-%t==ons re!=zve to v=cally-rnte9M=d <br /> de:anmmiaauan under the mca ngorous of field samples obtained from nrdls n•iuch partially- or <br /> ccndtuans. The case and rapidiLv of dezonrzmz=uan fully-p=c=%.e a given aquifer (Patton and SrrirtlL <br /> for this sampling dcsir rc- mvcs the nc=ssrn• for 1988. Robins and Marun-Hayd= 199I). <br /> single-tt til dedication. This paper dose-rbcs drug= <br /> perfoi:ran= capabilities. and field testing of the o Crounthtiatcr qualm dam: denied from dL%---c <br /> disme.e paint-atterml sampling dc-n= knots as the point-intc-ial samplers (DPiS) protide a sound <br /> KMS S=Dler. basis to dt zine ate REDOX bounda zes and to <br /> evaluate d=-.m=1 and microbial proccsses in an ' <br /> Introduction aquifer(Smah G al- 1991). <br /> T.e =pan== of lose:}-spates ds=eze o Dis"�.e point-interval monstanng of fare~:- , <br /> usicrval goundtitater sampling has beet dmnonstsmtd gradient trs= tests c=bles d-vc'.aprn=t of a <br /> in the, lsteranzre for monstonng of acltieotas-phase th=-dsr►iC=cnal pie...m of hydraulic zond"- <br /> conmixunants at hazttdous waste utes and durng fsc!d uvaty (Molz ct al.. 1988) <br /> cnpCzmc its. Data obtained from dz=—='-tntCT%`ai <br /> samuhng deme= provide a mor. =mpi= o Dss.=-- point-tntertal nwnitorsn3 pru"d= an <br /> ,ption of the horrmnsal and v===1 cunt of a ac=raze d==Mnatson of the the--<UmC Cn21 <br /> =nMmusanr plume rzi2tsve to single-s-m-= wells with dssm-buuon of preasnwnc head WWun an agmii- <br /> Iong ==ling eines. the ad%w=g= and (?anon and Smith. 1988). <br /> pe^ornan= charact-^mics of d. e point-un rval <br /> g Candxater sanapiing a.- m.plored from a =nC:-*;rzal T:.c fest titre-- fa:.dirigs are paruciiarly <br /> arra Snitch. 198S). their-..=l (Rcccins andant an view r.. <br /> of the she= nubch=r: <br /> lc= <br /> of h .c= <br /> Nei= n-rid=-z. I°Q i). and src:z:.'ncn:al bass R-,Zc s:c u;.cc- tz—,sL3ierz� sunervis:an in the Utut.�+ <br /> ==je, cf underground 9--m-= MrLk <br /> g-C.=t �-�- acs's {`�iae{.'t a al. 1:'3G}. for - s:,er r.�.rager.err sz.�t�� c�:.�zt!t MIMn9 <br />