GROUN DWATS B WOR KPLAN

FOR THE

ROGER S ROA DMUNICIPAL LANDFIL L

SUPERFUND SIT E

SUBMITTE D BY :

TH E CITY O F JACKSONVILLE, ARKANSAS

NOVEMBER 14 , 199 4TABLE O F CONTENT S

INTRODUCTION 1 . 0 Monitoring Wells andGround Wate r Analysis 1 . 1 Ground Water Sampling and Analysi s 1 . 2 Monitoring Wells 1 . 3 Well Development. 1 . 4 Ground Water Testin g ^fl-SITfi-SBCUBIH 2 . 1 Sit e Fencin g 2 . 2 Sit e Acces s a*C-5IlB-UAINISHABCEmESEUi-IIQt i

Thi s Ground Water Work Pla n fo r th e Rogers Roa d Municipal Landfill Super-fun

d Site will b e executed afte r th e EP Aha s finishe d exca vation and transportation o f contaminated material fro mthe eite . Th e purpos e o f thi s plan I s t o meet th e requirement s o f the statements o f work fo r th e sit e and provide fo r operations and maintenance <O&M ) o f tha sit e afte r remedial action objectives ar e completed. The Cit yo f Jacksonville will drill thre e newmonitoring wells , provide site maintenance and security. Th e Arkansa s Department o f Pollution Control and Ecologywill performwater wel l sampling and analysi s and repor t th e result s t o the EPA . Th e EP Amaymodifyth e ground wate r nonltoring phase o f thi s plan depending o n the result s o f th e water analysis. JLJLJaQmaBlJSe-MEI.L.-IfimLL&TIQ S The citywill Instal l thre e ne wground water about 50 0 fee t down gradient o f the drumdisposa l area . Th e wells will b e locate d at angle s o f abou t 22. 5 degree s apart , center around th e most probabl e direction o f ground wate r flo wwhichie east'southeast (122. 5 degrees) . Th e well s will be approximately2 5 fee t deep withscreene d Intervals from1 5 t o 2 5 feet . Figure l- l show s th e propose d location o f th e wells whichare numbered MWR-Oa , MWR-0 9 and MWR-10 . Th e new welle will b e installed upon approval o f the 5PA , Du e t o poo r drainage o f th e site and surrounding area , I t maynot be possible 1 0 drill th e wells fromDecembe r throughMay . Anysignificant change t o the propoeed drilling site wil l be coordinated withthe EPA . Monitoring wells will b e drilled utilizin g hollowstemaugers, air rotarywit h casing driver , o r similar methods designed to prevent th e introductionof fluid s to th e drilling process. Monitor well screen s will be

installe d a minimum

o f 1 0 feet belowth e ground wate r table. l*2-BBIA-S^BmU£TI<2f i Th e monitoring well s will be case d with4-inchstainles s steel . A0.01 0 Inc hscree n slo t opening will b e used . Aclea n silica eand pac k will extend fro m total depthto tw o fee t (2ft. ) above th e wel l screen. Aminimu m

o f a two foo d (2ft. ) bentonite plug wil l b e placed abov e the sand pack . Acement/bentonite piup will be place abov e th e san d pack . Acement/bentonite mixture will b e utilize d t o complete th e remainder o f th e well . At al l well Locations , above ground protective steel casings withlocking cap s will b e installed. Th e locking cap s shal l b e inscribe d withwell identification information. Th e protective stee l casin g shal l extend a minimumo f two (2 ) feet abov e ground surface. Actual hydrogeologlcal conditions encountere d will dictate specifi c well construction details. Field adjustments made during well installation will b e recorded in th e field log book . Typical monitoring well construction diagram i s shown i n Figure 1. 2 i^_M£LL^i2£^5L2£y£UI Groun d water removed during development and pre-saaplin g purging will b e contained o n site until a laboratoryanalysi s i s performed. I f tes t result s indicate that th e water i s belowdischarge limits (Maximu mContainment Levels o r MCLs) , the contained water ma yb e discharged onthe ground surfac e o f th e eite . Shoul d laborator y analysi s sho wthat th e wate r i s contaminated above MCLs , th e water will b e treated t o a concentration belowMCLs prio r t o discharge .l^-5BaUCC-MAlfiB_l££:L^ S Existing monitoring wells MWR-OI , and MWR-05 , and ne wmonitoring well s MWR-08 , MWR-0 9 and MWR-i o will b e sampled a ininiaium o f onc e pe r year. Althoughth e EPA' s Record o f Decisio n call s fo r 3 0 year s o f ground wate r aonitoring . Th e EPAmaymodifyth e water testing requirinent e base d o n th e result s o f th e first round o f testing . I f th e EP A determines the sit e i s no longer a potential threa t t o th e ground water theymayterminate ground monitor ing . I f the EPAdetermines , (based on ground water testing results } that th e ground water pose s a potential contamination threat , the City o f Jacksonville wil l notif yadjacen t landowners/homeowners. Th e Ground Water Sampling and Analysis Pla n i s found i n Appendix A . Th e Arkansas Department o f Pollutio n Contro l and Ecology(ADPC&E ) will conduct ground wate r sampling and analysis i n accordanc e withthe procedure s in th e Appendix . ADPC& E will notifyEPAand th e Cityo f Jacksonville at least two weeks prior t o sampling s o th e EPAcan collec t spli t samples i f desired. ADPC& E will repor t th e result s o f th e ground water testing t o BPAand th e Cit yo f Jacksonville within 6 0 day s o f receiving the final analytical data.

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2 Th e site fencing will be inspecte d a t leas t fou r times a yea r by the cityengineer to deterttine th e integrityo f the fencing . Break s I n th e fencing will b e repaire d a s soon a s practical. 2*2-5I1B-A£CB5 5 All gate s into th e site will b e locke d whe n personne l ar e no t in the site . Th e Cityo f Jacksonville Engineering Department will kee p a se t o f key s t o the sit e an dpersonne l requiring entrance into th e site must contact the Engineering Department. Alo g will b e maintained by the Engineering Department o f personne l wh o req-ues t entry . Th e Cit yo f Jacksonvill e will be th e agenc yresponsibl e fo r coordinating acces s t o th e site withth e propert yowner. ^Q-SIIB-aAiaiBHAHCE Th e CityEngineer will Inspec t the sit e annuall yto determine i f ther e i s a nee d t o regrad e th e site. t o eliminate an ylo wspot s o r depression s that hol d water . Essential drainage ditche s will be maintaine d t o provide positive drainage of f the site . I f necessary, clean fill dirt will be hauled i n t o fill lowspots. Mulchfromthe cit y tubgrinder maybe use d t o cove r freshl ygraded area s t o help control 

### erosion,