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i <br /> 4. North Area Groundwater Investigation <br /> On April 20t9, representatives of Nestle met with the Water g0aN and proposed additional <br /> is section of the <br /> gro�amender diamaedalanto tougher dehne the limns of Cod Inrues ^°farad¢Area ¢:¢ grnnawatnrm <br /> Work Plan describes the methods for aaablonal She investigation to <br /> Noah Area <br /> he Groundwater samples infected from the Intermediate Garifer closer to the <br /> its that <br /> rgedhaarela highpredictieamS er <br /> tthe <br /> on of ICE Compared to �-t,x-oC[ lid-da and Nl-IOC) have <br /> whhe thverricleana other Intermediate ANmfor ( CN^ 20U). Groundwatsamper <br /> Site in ces ombination edite Arluiferl he Northa am different from <br /> primalrgry usl`x ad coverconcentrationsFkfta elCE t has been pooddeardy p`mpiiwandr manes shown, <br /> interpreted <br /> primarily <br /> review of CO concentration trends, Tdawa erwimmmel ermealte Mnrcerh peen <br /> undwater How patterns (AN[C, zlmz), that grow n <br /> patted by Cots onfiuting in the vicinity of the W VIIP and this gem nhbrlaer has <br /> a specific <br /> OCF( k al <br /> gm " where the rvnwntmtmn of TCE breakdown products (han IC d the northerly hydraulic <br /> higher man TOP. Bared n the higher proportion of cis-lR-NCE man TCB, an of COCA <br /> rmegram Mad North Area rep emthelndIngeage <br /> igFac' of thelnt� eWVFp �n me <br /> ongln i ew find oftheWWia_ Cs <br /> 4. <br /> OBJECT <br /> The <br /> rail ob Icrere of thisinvestigation in Is delineation <br /> ofllow grnlBWounawater�rthat w will <br /> ll be assessed used <br /> to <br /> tlto <br /> gcoYe� remedial poorintr is t viable In mid area. <br /> nfnm that the va intrusion ay <br /> 4.2 0 <br /> After reehwing recem,groundwater monitoring results and the reports summamed In Section 2.4 k <br /> appears likely that CAB. are present in the Intermediate Mager atdepths of ammxlmateliM t01n <br /> North Area and potentially deeper. r drilling of monitoring well heahArea (Figure <br /> No eV IntermediateAquifer was logged as two sans intervals <br /> the A4 alfigureal.tW_ agVhe ay the gged f <br /> and laifeet bgs; slltyclay gas logged from idlhet bgs to 185 het bgs where "blue ofly' <br /> was Brea, indwatingtMmp of the Corcoran Clay. Thegeophysicepri suppoergalned the firo � of <br /> between <br /> zones between 11a and 1aYfeet bgs at the M-xT Ion nation, <br /> with Prlmanry <br /> sediments beonzth them.There does not appear to be a R-sand above the Cncura n Clay t this <br /> loratmn bud it may eat elsewhere In the NOrth Area. <br /> bee <br /> Ends ' vast tin will first mad ether conditions to depths Opir opC � n <br /> Previously used nearby to characterize subsurface contiguous t Cs to d foci <br /> st ikTop <br /> y0occurin <br /> 2011). 0 nnawater samples will target warse.gminea Intervals where <br /> allected <br /> me N the primp cy locations, up to Tom r <br /> orth Area,and <br /> on the ansa lcal plingrem <br /> bcat for samay becadvanced,a up,malate hem a <br /> and skawn on Opera <br /> Targetedto evaluates conditions <br /> at <br /> the estimated <br /> areakashownden Figure orLocations hell be North Area. dixations are appmrimate and may be <br /> the estimted dmveld co em erhnt <br /> altered based on field conditions and across. ���/� <br /> 11 - R&CH <br />