#056 Well Drill - Laserfiche WebLink

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~ 1 n the ease of a' we i 1 f i n i shecl at a d i amei-er rf 4" ard ex-fe€adi ng `h:-os.,yh the P I attev t 1 I e L i mestone, th i s sha-i b+r accomp 1 3 si~eci by i nsfai Iirsg a~;;~ 5 inch diameter casing #r°om the surfa::e through the glacial drift Qnr: s°nto the Ptaffievi I le Limestonea A nominal' 5 inch lminirsaum) open hoib shu1 9then be t<r; ;;3d through -the undes i rab l e formai° ions and at ! east 20 #eet 6 n-; rthe co;W;ttnuou; faulty consolidated St. Pster° Siandstone andlor at Ieast 20 feet boSow th;Q p{;p;:ng wa-ter i eve Iwh i chever i s ! ower. A?n i ni mum d i nch ! i ner sha3 i i-6ie€i o nsta 1„ ) from the surface i-o the bottom dDf filae 5 e nch hote, and the bot-c,, !G ~~et s.,af I be grouted i n p I ace. The nom i naI 4 i nch open ho i e sha+I 5e conY i nEeed i r,to ttle ~ wa-ter bearing formation such di:stance as is necessary i-a prov;de ;`hc: reguired water supp l ym I n case of wel I s 1 arger tfian 4 i nches, aI 1 0ther Lom.po;,ent pa;--t, of the we I B sfia i i be constructed proport i onate 6 y. 4--5. A;i wells fior domestic use hereafter construcTeci ;n the Vsliage of Arden Hills shall be constructed in such manner as to pr-ocJuce ayqsmimum initeal suppiy of 900 gailons of sand free water per hour< ~ ~ 4-7. T'he pump and other equI prnent t nsta l ! ed on we!! s i n firden H t I I s sha i! conform to the #oliowing minimum standards, to-wir: (i) Pump and equ i pmen•t sha i! be des i gned to assu r-P a po ( Iul• i an-proof and frosfi-proof installation. (2) The pump base sha l! be consl-ructed as OQ perm ii i nst-ai} a-t b on a-i` a water-tight mounting. ~ . (3) A we1t seai shatl be used. Such we91 seal shaPl be of sirnpie construct i on, eas iI y i nsta t f ed, : emoved and re-- i ns-i-a- 8abi e shou I~ t t become necessary tca remove the drop pipe fos- repa ! r°. (4) The top of the we i I cas i ng sha l t be a m s n imium Qf 18 i nches above the baserrent f 6oor leve l and i-he sea s staa i 6 be so sirructed and tnstalied as to maintain its water=i-ight feature; shouid floodirg occur. The pump room floor shal9 be at least 6 inches above the the surround i ng grade and the concrete p d atform sha f 6 be m i n i mii7: of 4 inches above grade at the edge. (5) Suction Iines installed through the weii casing, or where otherwise installed tess thdn IQ feet betow grade, shatJ be prav'sded with ai; outer protective casing. Such protective casing shall be set watertighf Into the welf casing. The suctaan 6:1ne ~_i-+ail be cau!!,,.e:: i nto the protect i ae cas i ng to prov i rJe a waterti ghi- jo3 rit wh i ch w€; 3 permit easy removai. The suetion ! ine shaii slape «p;<<,:rd ioward the pump. Where a suction 1 ine is brought ini-o a basemeFitD from; ' a weii located a# Ieast 18 inches above $he basement fioor. (6) Provisions sha I i be made in the wel I sea i for z•u o us-n rneasurements of stat i c and pumpi ng i evel s. 4°8. After final instailation crt the pumping equipmenty i-he weld shail be pumped continuously until the wai-er is free of turbidifiy, then chlcrfPiated heavily in accordance with the fol[owing procedure: (i) introduce into thQ welt one pound of high tes# (70p or equ'svalen#) caicium hypochiorite (chlorinated lime) by scattering sane over the surtace o# the water in the well so that the powder wilt 53nk to the bottom, thereby permeating the supply. ~ (2) ff powder cannot be introduced directly, then mix one pound of calcium hypochlorite high test (70% oc equivalenfi) witn five galians ot water and pour the mixture inta the we,:. (3) Aitaw the chemicals to remain in the wetf for at least fwelye hours then pump to waste untii the odor and taste of fihe chemacai have practically dlsappeared. ' r , i , -3-