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JUN-25-97 IS=53 FROM=Ceotechnical Resources ID=5036446G <br />~ ~ <br />~~U~~d~a~? <br />The ~ollowing assumptions were used iz~ the prepara#zon af this scope and cost ~e. <br />I) Sdz1 ar groun~dvvatez' c~ta~rnination waI nat be encourttered durirtg comsttvdion of <br />the test w~1,, obsetwa~.ion wells, or d~uin~ ttxe pump test. It shotttd. be noted tha~t <br />this scope of woric does z~at include ~rovisions ta rnazaa~e or di~pose af <br />p~zaleum-contaminuted soiI ar gr4undwat~r that may be encountered during <br />dn7[ing or pumjp testin~. <br />2) Centua~r West ~ngme~iong Corparation (GV~EC) will attange ~vr aII ger[nits <br />associated vvith t~ dis~wsal of water produr.ed during the pout~g test. In this <br />regai~d, we have a.sstuned tbat aI1 water puz~ped fr~nr~ the test wdt vcr;II be dis}~osed <br />itrta sh~ tlosest practical inIex to ~ e~g ston~t sewer system <br />~CQ~'~ UF WQRK <br />Our scope af work is based on our discussions ~vith Mi.e Hayford w~ith CW,EGy prolect info~n~ion <br />pz~ovided by CWEC, az~d o~r experience with simil~c projec~s in~ tr~e area, This sco~e of work includes the <br />tastcs oatlizied beIow: <br />'X"ask 1. Canstc~fdioan af Z~ `PVeII and ~'wo Uhservs-tion 'V'VeILs <br />A, test we~I artd two obsezvatian w~ls w~t be coz~stnict~ed near azxe oorner af the ~ouRhc~u~e Sqcia~ne <br />~OC~. ~kC tCSt wv~ Wl~ ~e COIIStrtlCteC} ~7 V~~StF~~ ~Il]g, ~I1G• ~~t~l'$! O~ ~8~ 41~0~1~ <br />acting as a subco~actor ta C~tT. The obse~v~t~on welts ~vilt be canstructed by Geo-Tech F~xpIor~ians of <br />Tuala~n, OreBon, usin~ hollow stem auger dri~ing methods. Weste~erg and Geo-Tech Fxplor~ans are <br />Oregon licettsed we11 co~^actors. A rable-tool drilI ~g will be used to const~'uct the test well, <br />Installa~ian of the test well and observ~tion rave~Is will be observed and docume.nted by a geologtst from <br />GitT_ Th~e test well will be 8~ in. m di~neter, and will 1~ d~led to a dept~Z af ebout 6Q ft. 'Zhe casi~g vv~ <br />be perfar~ted. beiow a depth o~about 20 ;ft u~sing a down hole hydraulic per~Farator_ The abs~vatian we11s <br />~7I c~sist of a I~iri. ~VG sl~€#ed pipc iunstatl~cl to a dtpth af a~bout 35 to 40 ft. Each well wall be <br />e,onagletsd with a~ush-mount wel! mor~ume,~t at the grownd surf`a~e. We ~nticdpate the test weIl c~n be <br />incor~oradted into th~ desigri, of the dewatering sys~u. <br />Task 2. Pump 'Y7est ` <br />A 24-1~, cansta~rrt-rgte purnp test wiil i5e made to cva~uate ~e potential yield o£tlte test vv~eIl. The test w~l <br />be made by W~ usiuzg a sub~cters~ble welt pump capabZe of ptur~ping ax ~east 30() ~pm £rom a depth <br />a;f 60 ~~1ow m~stuetne~rts wYIl be made with an i~liu~e mecIa~nicaI flow rneter: Water Ie~rels in th~ wetl <br />will be m~e~xred a~nd recorded during ar~d after the t.est usir~g art e~ectxic w~ter Ieve1 indicator Water <br />-2- <br />