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1. Tbe pH, conductivity, and airbidity 'Meters will lbmee calibrated at a minimum at the beginning teach iampting 1,usingcommercially►nr itif ii. i r'.1ii wM be r .i :, • to three tir+w during tr day to evaluate thepotential •at the«' r .r7, is drifting /• t r s.instrumentddft is detected in the meastirements taken during 7 r +1 i • and r w,rt r • + will be adjustedaccordingly calibradbri logs areincluded rf r! ': I / Wr r. i During purging . t t:sampling of the instruments will be used inthe.same Warmerasduring calibration. 2. Depth ".1 water ill be 11 w5 t a. • t prior to sampling, i each !wellas t. sa. N f e 7 !' J 4A. I and recorded ! • the Purge Characterizatioaand Sampleg., volume of groundwater t the wellcasingwill be rf using r following 4 -inch well- '(Total Well Depth froitL the mark an the well casing(f't)'- DTW (ft)) x 0.653 gal/ft. .3-, Prior to purgimg, the- water will be%examined-by- using m. disposable -I bailer th2r is- clear - lay= win:Y. noted is t i rre t u[ immiscibleW=observedthe well willnot be purged prior to sampling. The ll ffl then ! purged l i.• the -purge pumps-- Due to R( thatthepumps; 7r ust purge water from t iii as J: 0 -to 80feeti+s i gmundsurface,purge_es range from 1 .: to gailon per t( li 1 This -purge ratedoes (.( aJ • .✓.. toexceed the r . • .. W. of the Purge water .. be discharged to -the ground r rM►. i 1: t i'• 1to watermeasur=e= will be taken perio(�cally during 7 ti i t! purpuseof 1r. measurementsto monitor -drawdown. decrease :[7 groundwaterejevadon is J i s r.f the purge .r will be t .M .=i rt until et.:rf. r rrir: (purge equals w. :llf gc rate) is achieved. The fi=juency of rt ✓• it art ent will • - -once everyfive minutes[ r [ f sNv/ 7 t. t to once : • on-e—half i. 7' [ (:f ... equilibrium has been 1 f rt: If equilibrium cannot be reached, it will be necessary to purge the well i' is • y: Purge until lessrf .1J I (r% of r odginal volumeof water remainsin the vmIL Hand bailing g 77 be .a rt ... to rr ..a this . r ..«r: Monitor the ! ► every 15 minutes to evaluate recharge. r.rt sample • collection Vfien either two r.r • `: w has filled «• r:. f bours has 4-4ned since dr. end of purging. Collect �Olafffe organici no later than two hours, r ` W: purging. `e:«■ r all actions Rd measureme= associated ..r r. puz�ging a well, dry •1thePurge •' «I. -«Y.•7 and S=plc Log. 449-R IU310R323 CWf d& 2000 x am kr- M. htiy 14, 2000