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initial well redgwelopMent by ovrAbblng and airlifting is an <br />extremely Important component Of the Wall red69010PUIGht <br />process. dEOSIOIENCEanfidpatesthatal loot 60 hours <br />of ra.4,4v'qJqpiIntbyswaUbIn9 and airlifting VAN 150 <br />ngpespipyto gf(ipa�dy remom and neutralize thechemIdOls <br />Introduced In Tesk 0.3, and th-radayelop the filter pack <br />and near well zone,MOSOIENCE Will provido part-tme <br />Inspection durIngthe airlift development Process and <br />will (apsolymonifor discharge watertarbidity awksand <br />content,to track the 0 . MIODIrrient progress of the well. <br />Gr&Ofij�Ce will coroluffyiellowsand concerarations <br />withinthe disohotgothroughOut thkproOM-Arld will <br />provide direction to the Cofitradizil' should 0110ticUlar 01`086 <br />orlhe screen requiraL additionalmork to reduce the sand' to <br />a nilhImum. <br />a. Final by Pumpingand Surgirig <br />Final and surging is a <br />particularly Important part.0if the YedWek;IPMOnt Process <br />a qd raq u fres close. mobitod Q of WMEADVOI 0 00. discharge <br />data as wolf as send content GIEMENCE will Monitor <br />finnjdaveippmont on a part-time basis. Tots for SAW <br />coniam.and spqolfb capacity Will beperformed.firequently <br />to measore.the Odyahoofrent of the development PrOMBS <br />and to ensure that the Well is fully developed before <br />bog)nnfr,g the aquirer Pumping teisu. GEOSCIENCE <br />anticipates that a minimum or 40 hours Will be nacessery <br />for thorough redevelopment. <br />f'.Step Drawdown and Constant Rate Pumping Tests <br />Once final redevelopment Is determined to be. complete, <br />pumping tests will be performed On the wall to determine <br />any changes to well and aquifer chaeacP56stlasand to <br />document send readings over time from start of pumping. <br />Recovery measurements should be collected for a <br />minimurn of four (4) hours following the conatant rate <br />pumping test. The recommended aquifer pumping tests <br />aressfollows: <br />* stop Drowdown Pumping Tests -to determine <br />speolfic capacity and well efficiency relationships. <br />Typically three to four rates ate selected for pumping, <br />beginning at the lowest rats and working up to the <br />highest. <br />* Constant Rate Pumping Test & Recovery TGSt - time <br />drawdown and recovery measurements will be <br />made to, determine aquirer parameters such as <br />transmissivity and6torativity. it is tecorhmended that <br />the constant rate test be conducted for 24 hours With <br />4 hours of recovery measurements, <br />r1_:0=r_NCE will orovide full-time Inspection during the <br />step drawdoWn test and part-orne Inspection during thor <br />24-hour constant raftAnd r"'WYtest- <br />g. PosMedevelopment Downhols Video SqrVW�0.nd Well <br />IDIsidection <br />it is recommended that a dual -scan dowMoI0-V1d60Vr.veY <br />be conducted Within the well fallowin ' 9 redevelopment and <br />testingto serve 90 record Of thO post -redevelopment <br />oonditlIon 611be Wall 0OW0941101 410rd0h. GEO$CleN(-)E will <br />providwfull-time Inspection dtfdf*th6v[df* Su". <br />The wait should be disinfected as S000 as r0dOV0100MOnt <br />and MqUils <br />T -sta 1have been pei1aftel, A strong <br />_pumpfngtL <br />chlorine-golutidn should beadded tofhe wall following <br />removal of #46 WI; 0'UnilptdobOln.'s fecluired-m1hlimum <br />concentration of 200nilfilgrafins per liter 0119/0 free <br />otdorins conoentretion. GIZOSCIENCEWIN OW44full.-firre <br />Inspeadend well disinfection to on6tirethatthe PMPdr <br />concentrators of.chlorine:,are used andthattho ch[Orine <br />,14 prippany injected and(figpersodwithin the wail. <br />0.'Prapoiro sulowary letter rapjart <br />Atths ooncluslonof GFOSCIENCE <br />Will preparaz letter report In 100 L f�rmat that <br />FINA <br />summarrizes the details of the redevelopfaant and testing <br />pr . owes, The report wro, at a minimum, Include the <br />fblowinit <br />Pro -redevelopment W611 DondfUM <br />0hronology0toativitles, <br />Description of mqtbodsuW during wall <br />redevelopment, <br />• Will redevelopment results and post4redevelopment <br />wall condition, <br />• Ana"s and results or aquifer pumping tests, and <br />• Other pertinent.delte, analytical results, <br />recommendations and.wncluslons. <br />Water and Sewer Pipeline Design <br />TASK I - PROJECTADMINISTRATION <br />Prior to the start of the project, We Will ham a WWI` <br />meeting with City &df and the projeatteam to review the <br />project objectives, schedule, the scope and approach. <br />At this meeting, We will establish a point of contact for <br />the prDjea and raquest,all available Information related <br />to the project. In addition, the NV6 Project Manager will <br />coordinate all aspects,of the project and manage the <br />schedule Ghd waste ensure the project's ompletion to <br />the satisfaction of the City. <br />TASK 2 - RESEARCH EXISTINS CONOITIONS <br />I <br />U <br />L9 <br />25E-450 <br />