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69 <br /> EnvirotacticS <br /> An Earth Systems Company <br /> Reverse-Time Drawdown Analysis <br /> Calculate drawdown az a well aver time using <br /> known[ransmisslvi[Y and storage coefficient time eitn Pumping Stened{minural-10=0.01 minutes <br /> values.Method can he used with transient flow LO^a LO-o 30-a Lo-x le-1 tp^� <br /> .Lams 1COoper-lscoh straight-line <br /> time- <br /> drewdown6 <br /> L6P \\ <br /> Return to Modeling Menu �\ <br /> i x60 <br /> 0'9W \\ <br /> Parameters Values <br /> Taammifixiviiy lsguam feet/dayl 30 <br /> snmaga caalr lam ldmarg�ama.sr s.Os •500 <br /> pumpng Rate(g.,11—per hi—) 90 <br /> fie0 <br /> Length .Iminut651 <br /> 11 <br /> r, reoma.wrvi y 14+10 <br /> Dlstenoo fmm Pumplag We110eat) 0.1 <br /> 5.5 Simple Finite Difference Model <br /> This method simulates a 1-or 2-layer aquifer system, uniform properties,well storage capacity, delayed yield, <br /> leakage, dewatering, radial flow to production well, finite-difference approximation for pumping test design. <br /> NC Division of Water Resources <br /> Simple Finite Difference Model �Y <br /> aei <br /> , <br /> Wlsy— i D.naFkecds <br /> 'im�laam orz LayerAarmee Caparny aita Rars e 1 .7 mnau iv IraetlE 1 aym vials�aakagellnawat�mq.pmral +w sd h ay <br /> Flmrro Pmalc,lnn WML mltn-tllffemmn y'.'G-s„x" 1m"f01I r'T° al all <br /> npsrmlmatinn mrv,erWingT+Sl pe.:jn w.*�ul•�ac.coaoaRyarau 9cona^vtiviry rceeli2r;f 0.1 IeakY <br /> P,o9ram L.,.w m Pen on tao9— 1 <br /> Prezenteahy Rlahmn,ILR.end- 4,ole,Thkkn¢ss tk,,il 65 All <br /> aw.t9T35eepage stlgrornaxaea Aquihv al Hyaraurc nmtlur[iri[y tfeetlaai) <br /> naly4sM analog ami signal Water Table <br /> elhrAs.bM1nlWlky65urs.I'd New Yak. eel`•'e”"'�1e'e1'aea•"^.� <br /> anG Rathmd,K.S.sIM Rushlvn,K,R,198d, —nni,g llr5[TM1iekness lfeell 600 All <br /> N--m¢lhW of OunQing test K rnb <br /> ,",g mbv¢ Wthsm GROUND WATER C fined kplkr slwag¢CxMiciont tdlm¢mimleso 0.00 All <br /> otu,Nof For delanson equal®ns aM wa —1,Aglnfer Gnrage CrvMlr'.ent{akmnti6nlrs arcl mnxrn) — MI <br /> sumpeanssee Walmn,WC1�5L,tl <br /> Mim Practicelape¢zofgrounllw Rotlixtion well Eilective Paduz lke0 0,5 All <br /> moeillnO NATIONAL w left WELL— <br /> pages 3ae,_ Top vl Ag Iftr Depth It- 100 AI <br /> 1n 1 wafer l ewl Oep h lfi Pi) 33 All <br /> Ra[urnw Motleling Menu o,amawell Di hage-gall.06 R8 All <br /> I® engl�af Tem lminu�ry <br /> 44d0 All <br /> COMPUTAI ION NE4LLI$ <br /> Water Iereds will de displayed at prOdvcfim well and.Fwe observation well sites at selected logarithmic spaced times mclucOng the end of the test.then wales leveh will tie displayed at the end oPthe[est at selecU:d IagariNmic sRaced distances <br /> L,imsWt:ORAWODWM <br /> P---well Ee,1h ae a ae)=a5.m <br /> nu 3�Tx mm 3300 33x0 33.m 33.60 <br /> 6p a661 s,.m 3300. aim z3.o6 �t.6o <br /> 0,36 �i9 33a0 3300 3iM 3i.00 3100 <br /> 05x {x03 33m 3300 3306 3300 3360 <br /> 3360 33m 33.66 33m 3100 <br /> tµ SSn 33m 33m 33m 33.66 3360 <br /> 3M6 3}60 3}66 }3.00 pm <br /> 363 3300 33gKr 3360 3360 33.00 <br /> sT3 nt 15 ton 3300 3300 33.00 3}60 <br /> s. 113, 33.60 33.t' 33A0 33Aa 3}00 <br /> h d rest lmiame1=964 <br /> 0.50 15031 <br /> a)a <br /> 60.51 <br /> 5 X99 33.]9 <br /> 315 3391 <br /> soa 33oa <br /> Using this tool with the previously determined aquifer characteristics and a 98 gallon per minute pumping <br /> rate, the Proposed Community Well does not produce any appreciable drawdown at the modelled distances <br /> away from the proposed community well and,therefore,would not be expected to produce drawdown at the <br /> Rigsbee and Griffin wells. <br /> Envirotactics, LLC Page 19 of 20 Groundwater Modeling Report <br /> (732) 449-0077 Project No.6704 <br />