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HomeMy WebLinkAboutDRC-1991-001043 - 0901a06880ae6fcdUmetco Mlnerals Corporationu\NHITTE MESAMILL . P. O. BOX66sl . BLANDING, UTAH El/l51 1c [EDl)A7*2?,21 WHITE MESA MILL LICENSE SUA- 1 358 DOCKET NO. 40-8681 AUGUST 1 991 CONTENTS: APPPENDICES l- L BOOK 4 0F 4 Contents-Book4of Appendices I-L Appendix I Extracted data from soil property study Chen and Associates, Inc. July, 1978 by Appendix J Appendix K Environmental Report Prepared by Moore, January 30, 1978, Section Hydrol ogy Completjon Logs, t,lhite Mesa Mill l.lells Dames & 2.6 l,loni tor Append'i x L Letter Report - "Fly Ash Pond Geo1ogy",A. A. Kovschak, December 11, 1991 f,t$ii:,! eE',ir,,f:i.t1i;t#r.iju'g Data presented in this section was gathered and assembled several years 390, and may not reflect current evaluations. tlhere conflicts exist, contemporary sections of this License Application should be considered "control I ing". APPENDIX I TABLE OF CONTEI{TS Secti on I Figure C-1, Boring and Test Pit Locations 2 Chen and Associates, Inc., 1978 3 Chen and Associates, Inc., 1979 4 Dames and J*loore, 1978a 5 D'Appolonia Consulting Engineers, Inc., l98la 6 Rogers and Associates Engineering Corporation, 1988 { I ,t , Ir [, [' {' b sEcTroit I FIGURE C-I Borings and Test Pit Locations I I I { o ,chen and associates, inc. CONSULT!NG ENGINEEHS t0ltS tOlrSlIPI ta S. Zulll . DEXYER, COLORADO t02tt ' IX e lxltrtxe 1e24 EASTRRsr sTREET . CASPEB, WYOSIXC 12601 SECTION 2 Extracted Data From SOIL PROPERTY STUDY EARTH LINED TAILINGS RETENTION CELLS }IHITE IilESA URANIUH PRNECT BLANDING, UTAH Prepared for: E}IERGY FUELS NUCLEAR, INC. PARK CE}ITRAL I515 ARAPAHOE STREET DENVER, COLORADO 80202 *3t7*71ry5 ao7127+2121 t Job No. 15,406 July 18, 1978 rABLE OF CONTENTS Table No.I Summary of Laboratory Tests II Laboratory Permeabi'lity Test Results III Results of Atterberg Limits Figure No.2 Holes I through I0 3 Holes II tirough 20 I 4 Hol es 2l tlrough 30 I 5 Holes 31 through 33 and 38 through 43 I 6 Holes 44 ttrrough 53 7 Holes 54 through 63tI A Holes 64 through 73 9 Holes 74 and 75 and Legend Note: The attached Iogs have been redrawn t *i,i lili lisislsilii; iilss i=s3;5lgs: i;ii:;i ii; ;. ;slsi;rsiii i;r isl r isr;3;i;i3o> r, (r>aadL6g .t'€\oro E ?u-dU a E +??'o oc: 5.1d.j- OC'ItOC'xx(€ 6 EIIo Iro tO \c)lt., C'xx i,t ao >.St;<ica C'O 6\o0 c h€nooc) C)o t- t ,C a rtlt3 t) q..r =d: C'€ o(d,-oix ocox- u.t sc zdp O!.OrNC' o ar 3 J =-o L o &g t i:t i a aFhda( oE-o.Nil C a S H F R s n R S E 3 a S 3 R R 5 B h a s' sR R 'g'€ 5E. r iie p : E s : e . P P !e * : I E + I S * * j Xe n i* .i.aa - gG Oa l- 9t -!}l AtOoF@--iOnd !,--rEx P n : S F * E 3 g 3 E e p E g ; H ;.8 ep s sE E!E 1 c-Oo9u 9: r@o.n(rl€o6 rr\j€' 3t- XO C G -6 o oo6 -o ao6C' C'is' c3 - 6€aer6 t tc -ct3 n 6 h 6iO n 6 N €hj"iGgt C' a a (r€6aD Ay9E i : r i,Si i f $ : i i i i 3 i i 3i-3 E if: i5otstsr-.@hct.tl6dF oo G. 6 sr !o ro o 'ci c - N rr i 5 = € X { {{ { {:$g E Bs o 3oaA Ja e U oUFae 96-5 Eo 4stt O €o \o :lr o> .'e.i . o . !.i h a !:a i' r = = :;a E i' ;=t te!i ; E E Ei; i i P;; 6 6 1 a E:; ,I a E:' i5E F i 5 i tg;;r i tif t F El3 t;r ; t ;;3 l55 aa !o E Qu =Ea a 5 6 ao I GIo x o (o o CI o ?- a ,a r8 oro ocq,-oto t* -o F eo 55la a. 1 oc-o.NXa ltvA Oa€h6€6ht-:.!6.'@€FSah€ ts€ o r r.a' F fi 6 F F t t da ro i ro J n ts s! !,t I,s's.' i s- p i e e e g, * p :ee E ,, f,E { H€ a rts o o rE @ + + { rt' + +'{t + rt rt :l' :E + t 6n466 =- €x I- E UT !!}r a- od€-?6E{qa-6N.o ; ia - ro or or r'r or ; i € =' - + (o N d !)--qEx dro <,odo6o6ao(oh o of'd-hi.a-JJ-c6N-N-(6N 6 NdN€'a t!Elra o3e !Ogt o 5 '-x6 € o -6 C' o o J 4=F o ca a :c a e:t -CvI3 666O€ad'+ dF(-6OiCD!ON!! oioh6 \Ot\Rhd !a C9ots6v .{i .1.*E-9ts.+.h*6-3q+=iArr- a r dl^ts;d6-i - \eq t-ld I Ii * r .F{ r i''l t -i I' t :fl I I I I I I O N6Fi; a.b o ti 6,$ o h+6 €) ; i ts':Fo -=-rr6 oots- Or N 6 6 g €16: Cr.Cr .l 6 6\O d 6 h O O N !n 55. .i:t J = 5\F\5\i'6 6 n\A \o € \o € € ts N ts ts5\\ ) o aoi4 I l l'{ 6FJ oEe F6UF doUts G4<ol- ae J LCI tI-=6 I I I lfr@Nft\-I\'!|.,\co\o;cn.a{=(\lcflirro6oo\oooo,naaaaaa"eooooooooo o'oo'ociooooo F--xrxxxxXXxxtrln..i\Orr{-rO\OraG{aa"r oo \o fn \o 'f N tr'\ ,; ooooog9aoo5oooooo9oolt\ tfr lr\ Lr ul rtr rJ1 u1 r,.\ rn otrr a, l' fla-.g e'l vlt60. =Lr/, o- d o gr cr qr ct cn .c'l gl g\ co Grr\oo :cFvt o ae aoa,E Ol- tr .$c).7| o.frJ\g\-Ifaocr aaaaaa"\t,Gt@@FrF\arrJ.\.nFGla? \O O .:t Cr 'rt\ 'if '+ - G{ aaaa""F Gf ftr atl Cr'l O al{ \9 ''!t rtr -F tt il-t vt tn Lr,lUatraovo o CL F ovl oa, -QI!O!(rcrtr C'L'Og,.a,lt ccBcoc6.o.!E4ut vt vt v, (, vl ,! q, FO(JC(J o ,aJ Ul ! -68u, anC'atulUl -=11 =ooovroLOLOL 'E' u .!, 1'CFae.!aoav, lJ=(J o rr\tt--*OF eo, 6t Laa l, CLe ,!tlt oL}'3C Ul!rl}{ oo -(J c3 oq, CL Et, Ft-Fl-FFa! 4 tFFFF v,F v,trld Fv,t!F lrlJao F= lr'A &,oF d,oa J I ( I It i 1 I I (\a\oooorcoidFcoGt\colaaa"-- rr\.tt\l.hF-COC-l'+NF- LL, a.jt<o Z,F dd. r./l t\rJ.|@Frt\ rn =- =c,&,lrl CO&,ur t- a d l.{o atOl? II vl ts =a5d, aod,lr,lr, l- LE'o tnF ar.,lrl G, I i C,an\Oan-G-a.i-al.f<.l cor.ol.n(,cl tfr \O N Cn \a) F(,02z,ottttrj-Ga)tJ ut ll,d,tl, o-rrr<Or/,o-gz o.E o(JCrt)C o 'r!an6 v, .n a, oo(Jrr--t,,{rot-(,LLr() iOtr'gu'it--EocdooGr-o.!i; ci s, ttt = tn lrlA F oan o -;-rd-l\i^J-r^rl6nltr *r I -i.{;O-ttn ::@e,Q.a.\9 \9 rrr or \o co (Y l^ (\l (fi r! q =.J1 ttgro.}, c E;-e vt u o EII o- .o ?ER i o).Jul ll,F-'so(,(Eoc ufr.{ .EZuIII Fsi i IIij I I! ! I : :':-:: .T:': -l II I I a i. .i I I .6.h. .i. i.' :::t-l .1l ' ' I'(r33J) NOtrV o I t BH ru P solt s touxoAIlox txGtxEttlHG chen and CONSULTI associates, inc. NG ENGINEERS DEXVEB, COLORAOO t0223 SECTION 3 96 s. zuNl Extracted Data From SOIL PNOPEPCT SIUDY PROPGSED TAILn{6 REEE'ITICI.I CELT.S }EiITE I.ESA URAI.IIUI.I PRO]ECT BIANDI}IG, TJTAJI PrePared for: E{EFGY FUELS N-IJCLEAR, Ifi'lC. ].515 ARAPAiIOE STREEE DEniltER, @IORAm 802a2 303/74t-r105 lio. 17 r130 January 23, L979 Table llo. I II Figure No. 2 3 4 5 6 7 I TABLE OF CONTENTS Summary of Laboratory Test Resu'lts Laboratory Permeabil ity Test Results Holes 76 tirough 85 Holes 86 through 94 Ho'les 95 through I04 Ho'les 105 through I 14 Holes ll5 through 120 Holes 12I through I28 Legend Note: The attached 'logs have been redrawn a I i ol aJl6l>l3l()I !l EI AJI-clUIolol c, I at'.rritrJlrl 'otolLiC'I.=: G:oi =i I II I Isl vl:,jtolcl.olvtt,I !i ciolol Iol =tolg! oiut rJlL)l l/lr c!crl.hl !!r: ,i cl trtl I I G: ui i o:..al L' ni EiCIc,l(,l Itri Ertrivl' a: U. !t er.L:o. &rialol =I rr; ,n,, I 'o' I =lff:sl: tg: ,l7l L). ai I 6i .rl Url -icri>JtE' ul .}t rl! arr t xji .ui >J =lglol"i si ol qri o;+r! UT:x:oi!i =lolr-lcll olol =l ulI >J Eiuil "l=lol a, IulolU: olcJl uiJ'g! EI rniIoiflot GJILIoiU: GI(J. I I I +rl ,l >l .:i ii lJlJ ;i -tciol,l >J =lol>troILI 1x -t .t1 i I I I I !:i,l cloi-i lr, o. 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Lt E tn \O crl - ,L,..otnNtiGtoC\.I N +, c..o *tr!*o@gt-:fU ..Lccot\t.YrOoororo- glc L J! !) UI J IL c-= !E JU ooru@JLo3OrL t:l ut + fo- Gl 6rO o (\r \O \O co F, Xl -lfF!FruMItt(r- U- U C- !r- !,- ; +t-a- o- a- 04. FcL For >c- po- o- t.. 't.. t, t,l.- ! Ur.. ur.r s0.-COf @ CGI C >-O tra. .\ .S Uu:.r .Yrofn - o.+1 ru .o-? .02, >N >N c! >(\J sln I l- vt a ut F t |lr I q, ! O I >.! O I IJ J J OJ >.J >J 'J iJ JoJ trJ lAJ .a J >A- O-t O-t FJ O-f J)==E!oC'O.- O.- O 19.- U.- U.- (/,t.- U.- (:.- C(rCO sttfr O\O t LO\ rr-- €O Cr \O OOt OL l\ \9 L\.o L a)@ vr.f -U1 rrO -\O -l\ lrCC Lto ! >! ro g .! .c ! I >t >. I >E >E vtl, vt -0() CO -O GO LO C(f CO CO CO oQ oOsl O6l .u.\l. O OC\r ON .!$I Gr(\t rOf! (gGt -c{(, I lrtl qrt c,=t >l ,Jtt .r1 I v, I .t7 I (Jt c, co r!(J UIvl.g (, t/,5 =./t LLIc. t-v,lrlF FC o €Hlr, CL:EEc,otrt (,a- &.ol- eocct J t5G - -{.\ -fiN - O\ Ol -{.t 6l Gt \.o .r^ t\ Nt(\lttcrlrttrttr-fi1-{cr-+.!Oo€\O\O G,G,a,Gr@G'A'G'G'G'A'G'O .:i \O ;; 8 : R N S R FcoccC\otcr *&4:44FFFI-FFFFFF.F-F o a (g aJ1 p ..::...6N..Qn"atd+o...C.r. .!l r{.... A ::::i b . . ..an.. ...t.t,"""EH. . ....8 : :::::.::: -.-.-._-G- - . -ah' 'o'."' ..Ei.'.'...t1 .,....9.O- .h!o" "'..R. . .d.t... ...4..' '.E'a.., .--tt A.'a' .i.i Fout.,o cco. out utl--3 (n ru soooat, .dz UJIo C"(9 =(Eo @ Go k TEo o.x IU lr.o U'(9o 3't3. : t p b t i ::::.::.:l::..:::::l::::::.::!.........t.........:::::::.,1::.::::.:l:.::: :::::::::::-I:::::::::I: .:.: :: ,{ I i I I II il I I a n w a a W ru EHIEI W w w ffir3a+l LEGE}.ID: Stlt (l&), saady,sllghtly calcareous1lght brorra. L.l: Dlsturbed auger sauple.r- NOTES:ffi"". holes vere drl11ed oosfugle-fllght, power auger.(2) Elevatioos are approxloace(3) No f=ee rater E:rs fouud la(4) IJC - lfarer Coucear (Z); -200 - Perc,eat Passl:g Yo. LL - Llqu{d t rrnr g (l) ;: PI - Plastlclty fndex (Z); llP - [ouplastle. approxlaacely 60-707 sl1t, flne to nedtuu saud size,wlth depth, s11ghc1y uolst co roolst, reddl,sh brotm co Septeuber 19 through 21, L978, rith a l2-lach, and taken froq costours shona o Flg. 1. the Eest holes at the t1tre of drIIllag. 200 S!.eve; FIGURE 8 LOGS OF EXPLORATORY BORINGS (CHEN & ASSOCIATES) WHITE MESA PROJECT Saod, s11t7 to saady sl1c (SM-lft), flue co nedlum gralued, approxlnacely 50-607 sl.1c, sllghtIy ootst to aolsc, reddlsh brom. Sasd (SU), sl1ty, flue to uedfi::u gralued, approxluately 3O-5OZ sl1t, solce scattered gravel, slightly nolsc, reddlsh brown. C1ay, s11t7 to sandy sl1t (CL-UL), approxJ-uacely 60-752 los to nou-plastiefloes, flae to raedlum saud stze, sllgbtly to aoderately calcareous rlth depth, s11ghtly aolsE, 1lght brorm. Clay (CL), sandy, approxlaately 60-752 low to uedlua plasclc flnes, flae to uedluu sand slee, sllghtly calcareous, s1lghtly aolst, reddl.sh browu. Clay (CL), blghly calcareous, sandy to slIcy, approxJ-aately 50-752 1owplastlclty f1nes, scattered very hard leuses/1ayer, dry to sllghc1y uolst, 1lght tan' to rhlte. Ileathered claystoae (Cf-Cn), approxloately 75-902 ruedft:a to hlgh plastlclEyflaes, sllghtly.nolst to molst, gray-brorm to greealsh. Claystoue bedrock, sllghtly aolst, greealsh gxay to dark gray. Slltstoue bedrock, well-cerneuted, verT haril, gray. Claystoue-saadstoue bedrock, 11ghtly ceaeated, geuerally gradlag coarserrlth deptb, flue to ued!:n gralaed, sl1ght1y uolst, greerilsh gxay. Saadstoae-slltstoae bedrock, llght1y ceaeated, sllghtIy o,olst, gray-broru. Saadstoue bedrock, falrly cleaa to sl1ty aad clayey, re11 ceaeated rl-thdepth, floe to uedluu gralaed, scattered coaglooerate lenses/layers, s1lght1y uolst to dty, taa to gtay. !SECTION 4 tracted Data From REPORT SITE SELECTION AND DESIGN STIIDT lIAILING RETE:iTION tu\D MILL FACILITIES WHITE UESA IIRANIW PROJECT BLANDTNG, UTAII FOR ENERGY TUELS NUCLEAR, INC. Dames and Moore' January L7, 1978 09973-015-14 I { I b I .I t TABLE OF CONTENTS P'late No. A-3 Boring Nos. 1, 2, 4, 5, 6 A-4 Boring No. 3 A-5 Boring l,los. 7, 8, I0, II, I3, l4 A-6 Boring No. 9 A-7 Boring No. '12 A-8 Boring Nos. 16, .I7, .l8, 20, 21,22 A-9 Boring No. '19 A-10 Boring Nos. 23, 24, 26, 27, 29 A-11 Boring 28 B-II Triaxial Compression Test Report Compacted Core B-I2 friaxial Compression Test Report Silt and Sand BORING. NO. IEL. 5629.0 FT. BORING NO. 5 EL. 5632.9 FT. REHEOT{N FINE SANO AND SILT. IrEDlUlt oENSE CIADING CTLCARTOUS lllttl C{L-CITE STRINGERS UULZ-10 A B l3 UU !E ro-AUo !TL:5.-IU6 l5 DI fA llOIEr LtGf? Bnorifl, srL?Y CLAY, H.tra- (T{ET:HERED CLTYSIONE) ,{EDITIII BROI{I{. VERY FINE.GRAITEDSAESIONE; :NIERIAYERID SELL- CETGITED AND IIIIN, POORI.T.CETATED BANDS 80rt ccu?LETED 9/LO/77 NO CrcU:{D t{AtER ENCOUUTERED HOLE COMPLETED 9/10/7? NO CROUND TA?EN ENCOUTITERED 20- BORING NO. ZEL. 5634.3 FT. BORING NO. 6 EL. 5633.5 FT. 5 uUL = GUo ElrL Z aUo 5. t5 RED.'ROUN FIIIE SANO AND SILI, I{EUIT'ILI DENSE GRADII{G C&CAREOUS rITH CIL-CITE STRINGERS GRElll-BROtiN s ILT! CIAI (I{EAIIIEREO CIiISTONE}. HARD GREE'ISII.BROI{N, FINE-GRAINED SATTFSltE! Ir?EruAYERED l,tELL CEI"EIIIED ANO IOORLY.CEHINTED BANDS RED-BAO',{N FME SANO AND SILT, I{EDIUI.I DEIISE GR.ADES CALCAREOUS IIITH CAI..CITE STRINGERS ANO OCCASIONTL ZONES OF I,IASSIVE CALCITE CE. TTENIATION HOI.I COIIPLEIED 9./10/77 XO GIOI'IID TA?Ei ENCOUNTERED . nocl Qo[t":r DESTGNAIION -- pERCENTAGE Op CORE RECOVERED INIIII6IIIS GREA?ER TI'AN 4 IrlCHE:' BORINGS 5r-I08 I 20_ LIGHI BRO{N TO GREEN C'.AT(TEf,THERED CIAYSTONEI, HAiD OFF-1rHI?E Sr\.IDSTONE, VERY rELt CE!IENTED BOLE COUPLETED 9./18/77I'O GROUND !{ATER ENCOUNTERED KEY INDICA"ES DEP?H AT 'IUICH UNDISTURBED SAITPLE I|AS EX. IRACAED SSING DAI.IES T !'OORE SAIIPI.ER TNDICTTES DEPTA AT XIIICE DIS?UREED SA}IPIE rlAS EX?RACAEO USING DA}'ES 3 I.oORE SAXPLER INDICA1ES SAMPLE ATTEUP? IJIIIi lro RECOVERT TNDTCA?ES DEPTR AT }'HIC'I DISTURBED SATPLE llAS.EX?RACTED USING S?AIIDARO PENEIF.TTION TEST SA}iPLEB PTETD I{OIStURE EPRESSED AS A PERCENTAGE OF THE DRYXETGBI OE SOIL DRY DEIISI?T ETPNESSED IN LBS,/CU FA BI'TS/F'! OT PENEARA?ION.USTNC A I{O.LB IIAfiHTR DROPPING 3O TNCHES lNolcA?Es Nc cotl n,uil ?EtcENt oP cota nEcorEtI noo. t-htatGCa nra?3a caa PERIIATIILI'Y IIETSURED BI SIM;LE 'ACTER tES" IN TT.ryR lrol ATPLICAaLE (usED aoR noo IN ctAys oR MEctAlttcAlrr?RACTI'RID SONES) ELEVIIIOIIS PROVIDED BI EIIERGI FUELS NUCLEAN, INC. DAtEs e ilooFrE totr couPlETaD' 9,/!.0/?7lIO EloUND T'AIER ENCOUNTERED r-slc 8C oc 6lcBORING NO. 4 EL. 5623.2 FT. ,v82' RED-BBOI'N TINE SAND AXD SIL'., IIEDIII,I OENSE 6I,ADING CALCARIOUS rI$I CA,.-CITE S"RINGERS GnEll 'INE-GRAINED SAiiDSmNE; l:l- TERITYERED WELL CEI.iENIED AlrDF6ILI-CEI{ENTED BI!{DS I c I,lc TlrI 5. l0 o REO-BRO',N ElllE SAND AND SILt,. I{EDIUT{ DENSE GRAOING CALAREOUS l{ItA CAL- CITE SfRINCERS GREEN TO ENOI{N. TIiIE-GSAINED SJ\NO. StONE, IAYEREO IIEOIUM TO IIELL CE- I{ENTED IdITT LIT"LE P@RI,Y CE}TENTED PLATE A-3 LOG OF BORING NO. 3EL. 5634.4 Fr.MATCH LINE 7. 6 t-I00?.0r-t09 I 3l 5- E-BROWII, FINE STND ANO SILt, r@sE GRADTNG CILCAEEOUS rltlf, l{IilotCArcI?E STNINCENS LICHT GRIY, T!.\'E-GF,AINED SAND-SIONE, PooRLI CE}IEIITED IN PARTS l5.lr-ll!l6a !Di,N SILTY CLAI (I{EAIHERED CI.I,I.SIOIEI, HARO D,RX GRAY. FIiTE GRAINED, SILTA SINDSTONE TITH YELLOId BAiIDS ItoS?LYIELL CEMETTED iJU? !{IT8 SO}TE TAIN.80a1, cLlYEt $u\Ds I T I | 568 IT LICHT GNAY, XEDIUT GRAI!{ED, XELT CEl,llNfED S.INDSAONE t{IiB ORA.iIGE LIIONITE SIAINED BANDS U!L 3 rrs-tsGuo I20 L:GHT BR)I{N T! PAIE GRAI, FINE tO !{EDI UH-GIUIIIaEO SANDST()NE IXIEILAYERED TA!iDS OF SANDY, GREEN CIAYS'ON8 IND PTI,E AROr.N SANDSTONE DRTLIING II\DICTIES I,ilFR^CIUNED,},ETT CE.TEIiIED STIIDS?ONE FUT\3ro FGuo I I I 2't LIGHT TO I"DIUU GREEII.BROdN.tGDltll ltO S'OARSE-CRAINED SAND- AlONE rELL CETIE$TUD GiOUND WA"ER LEVEL 56.8 FAlL/1/17 CONCLOI{IRATE IN LIGHT GBAY. FINE sDrD uAtRtx FBor{ 62.{ TO 63 Fl GRADES 'IIBOUGII I,HIAE SILTSiONE TO A GREEN CIAYSTONE YELI'T, !{EDIUI{-CF.AINED S,INDSTONE DNILLING INDICAIES GEUERAI.L' I{ELL.CEUEIJ"ED SANDS?ONE'tt! UINOR CONGi.O}IEMTE BAiIDS EOLE COITPLE?ID 9/1{/?7 la5- I I I5-3 Ir I MATCH LINE LOG OF BORINGS DAiTES g LrooRE PLATE A-4 ,0/!.91-103 I lr' BORING NO. 7EL. 5656.9 FT. I 3:' BORING NO. 8EL. 5668.4 Fr. 51/85. RED.AEXU FINE SAND AND SILT. IIEDIITI DEXSE GilDING CIrcTREOUS rIIH CALCI1E StRINCEiS TND OCCASIONAL ZOMES oP trAsstvE cltatiE cElExTATtoN PALI IiOIIII. 'INE GATINEO, I{EAIHERED SANDSIoIE. G8ADTXG f,TRDER DARx lloml tO OARX CRAL FTIIE TO ItEDIItrI GRAINED. I{EATEERED SA"T{DSTT}JE, GR.AOES HANDER ATD TIII COLOREO INTEiAIDDED Ii.\RD Ar|D VERY HARD.Llcll, GRAY SI{DsM_-E HOLX @t19LLTa,0 I / Le l7 7NO GNO'ND I'ATER ErcOUNAERED 30/El 5- RED-BROTN PINE SANO AND SILI, DE:ISE CRADING CILAREOUS r!fi CAt-CITE STRINGERS GRAOTNG 10 IIA5SIVE CALCITE CEilEHAATTON GREEII, I{EDIUI{ l<' COARSE GRIINED,ITEAIIEnED SANDSTONE DART GRA!, SIL'Y C'.ATST!NE, iJEATHESED llltH YELI.OI'.O8.A"ICE IRONS"AINING, GEJENALLI VERY DRY GRADES TO VERI BAND DART GRAY, I4EDIUH.GR.AINED SANDSTONE, :rE:.,;irl VE1Y lri*CinigdlED OFE.HHITE. I{EDIUT{-GRAINED SANDSTONE,:{ELL CEUENTED HOLE COHPLETED 9/I9l?7 NO GROUIID TIATER ENCOT,I|?EiEO 20- 5.7r-106 I io" 20- BORING NO. IOEL. 5690.9 FT. REO.BNoliN FITIE SAND AND SIL?, DENSE GiIDING CAITAAEOUS lIIT1I CAL-CTIE SIRINCEnli GI,IDIN6 VERT CAI'AREOUS ANDVERI DEIISE 30- BORING NO. IIEL. 5677.8 FT. YELIS' TO GREEN, IIUE TO IitEDIUIt GRAINED. TEA?HEREO SAIfOS1!oUE .GNX)TNG UARD. GREEN, }IEDIUI tt' CO\!:SE.GRAINED SANDSTOT{E HOIE COUPLETED 9,/1.9/:?llo GNO{'NO TIATEB ETICOIJNTENED NED.IROIiN IINE SAUD AND SILT CNAD:NG CAI,CAREOUS IiITH CAI. CITE STRINGERS J\NO SOI.IE ZONES OF IIASSIVE CALCITE CEITEI$AIION LIGIIT BROT'U, TINE GRAINED,TEAIIIERED SAITDSTONE CR.ADINC TIEI,L CEXEXIEO HOLE CO!{PLETED 9/18/77 NO GROUNO IdA,ER EilCOUNTERED REO-BiO}fTf EINE SAND AND SIL',XEDTUM DENSE 6nADING CAIf,AREOUS rlTH CA!-C:TI S"RINGENS LIGX? GNAY tC} OTF.HIIITE, ITEDIUU TO COAiIIE-GRAINED SAIiDSIONE, vEnlrEi.L cElrtlrtED C!I'R 6R.ADES TO YELI.oTI-?AX 30/O.t- BORING NO. 13EL. 5602.4 FT. !5- BORING NO. 14EL. 5597.5 FT. 3.:t-tc5 I .2 R€}.BROIII FINE SAI|O AXD sILI, TEDII'X DENSE plLE GnEIN, I,IEDIUU-GRAINED SAXDSTOIIE EECOTTES VERY IIELL{EI'IENIED uoLE COI{PLETED I / li/ 71 UO GEOUND TIAIEI EITCOUNTERED uU! Z F&go 3 LOG OF BORINGS EOLE COITPLAIED 9/18/?7 NO CiOIntD llATEN ENCOUNIEiED PLATE 4.5 BORING NO. 9EL. 5679.3 FT. 82/I 9tr' 50/a 2t- REIFBNOIil FINE SANO AND SILI TOTTLED OI?-I{HIIE AllD GNE!:.I,TEAIdLnED SILIY CIlIStOrlE OFF-ITHItI T{, GREEN. CI,AYEY, TEATflERED SANDSTONE GRADES iIAROER TO GREEII SAi''SrcNE CnEEs, FIIE TO I,IEDIUu-GRAINED, IIEA?XERED. CTIIEI SANOSTONE MEDIUTI GTAT, CT;VEY SILTSTONE 8IICK. IICHLY "EAfIILFED, SOF?. LAI,II NATEO CLAYSTO$E I{ITI{ ORANCELI!4ONIIE-SIAIITED LATERS I,IEDIUI{ IIOXA, IINE !O MEDIUI.I-GRAINEO SANDStof,!, VARIES FROl,t tloDEE,A"ELt CEI{ENTEO tO VEI,Y POORLY-CE!{ENIED IiEDI'u'!{-GRAINED SAIIDST{ NE, IODEaAIELY CEIEN'ED. WITII IRON STAINING ALOI{C BORIA)ITAIL TR,A TUNE BANDED, LIGIIT 'O MEDIU}I GREEN STLI- STONE, Ci,AYEI AND SOFT IN PAAT OARX GRTI !o BLACX, TTEDIUH GNAIIIEI,,EEI.L CEIIEII'TD:D. CARAONACEOUS SAIDSTOIIT:I{ITH SOIIT SOTT, BIICK, CLTYEY EANOS OCCISIONAL. flllN, CARAONACEOUS BTNDS C''NI:NUE VEIY IIELL CE}IENtEO. LIGA" GRAY TO OFF-lrHlfE, IEDIUX-GRAINED SAIiDSTOIIE POORLv-CEAEIEED PEBBLE CONGLO.\IERAIEtN SROTN" SAIIDY !{ATRIX, SOHE UNCEqENTED SANOY BATDS IODEIATELv-CE:.IENTED t{, POORIY-CEUENTED SAIIDSTONE GRADES HELt CEHEIItED MATCH LINE GAAY-BROTdN, IIEDIUY GRAINED. IOOER-AtELy tO POORLY-CE:{EIIIED Sl"loSfONE.lllclllt ERACTURED BY DlSl(IllG PERPEN- DICUIAN tO CORE AXIS GROUND HATER LEVEL 99.8 ?I. LI/'/71 AOLZ CO:i?LrtaD 9 /27 / 7 7 DAMES 8 iIO('EE 'PALE GREEN, ItEDIUil CNAINED, IIARD,SILICIFIED SANOS?OIIL PATE CREE!{. SANOI CI,AYSTONE FROU107.7 m 108.2 rT DART GR8EN, I,iEDII,II 6RAINED. CLAYEI SA.IDSTONE, I{OOERATEII IIARD l,I?U !{INORlNcl,usloNs oF DARK AROUN, ATCUTAA Gfu1VEL-SIZED CIIERT 3i ir 40qa =-trso 50 53 60 65 70 80 I I I I .L IIo I .L 135 - MATCH LINE PLATE A-6 LOG OF BORI NGS BORING NO. I?EL. 5648.1 FT. Rio-!ro.!r FlNr sA"\D IND StLr, DENSI GIAOINC CA',CAREOOS rITII IHII{ UYLCS Of VEir ctLcAREouS trtEttAL cnour.D HATER iLvEL 81.3 fi. Ll/a/77 CIRCU:ATIOI{ I'S?. STTLL A'PEARS I'ELT CE.TEITED 5.2r-lo{ I {' 6l z' r II r.r GREE IND IELLOH, PI;{U TO I{EDIUII GRAIIED, JEA1UURED SN.IDSTONE CREIT. FINE GRiINED, CIAYEI, TEAEERED SANDSTONT T{ITII IELI''J ANO I€D ITON STAINING AECOT{ES LESS CEMENTED SOXE CTRCIIIITION REGAINED BUtStILI, IARGE {ATER LOSSES IECOITES LESS CtlYEYt llosi CIBCUIATION LOS1 Ulo5\ Z- GSro b 35 TgL Elo FIuo a5 50 55 60 55 70 ?5 80 vEgf, LIGIIT tnoull m GRAY, l.tEDIUlr- GRAITEO SANJSTONE TIITH SOI{8 ONANGES?AtllNG; IODEFA"ELY TO IrELL CE!.EIED A? ?OP, BECOUES POORLT' cElcratD At 35 rl GEIIEIALLY IoDERL?EL!-CEIIENTBD sAllEl\orE IIEII-CEIETEED SANDSTOUE rooarArELr-cEltrNTED SAllOSmnE NEII, CENENTED sAr.Dr clarsToNE vllf, souE R.:D lroN sTArillllc, soFr GiEEtl, PINE GIAINEDT l'l0DEi- AAEL'.CE!{ENTED SANDS?ONE I}TIESIIYERED SAI{DSTOIIE TND SAi'DI ct;:tgrdlL HEtItCEnENtED S.\{DSTOIIE, APPAR- E![LI TITH OCCASTO!,IAI, FSACIUAEUzotlEi LIGI|! !ROH{. IIEDIUH?GRAINEO SltlD- S!OG, }{oDER,AIELY CEIiENAED, GAADINGrEI& CEIIENTED rELt-CElo:iflrED SA"IDSTONE aotE CoAPLETED 9/29/77 POOBLY-C!.'{ENTED SANDSTOIIE PMRLI-CB{E!'AED SAIIDS?ONE IiELL-CE}{CI|IED SANDSIloilE POORLY-CII.EITED. POSSIBLY CONGLOII- ENATE ON ET.rc?gRED SANOSTOIIE I{ODERATELI-CEIaLIEED SAIIDSIOI,E POORLI-CE:{EITTED STXDSTONE rEt rrCEllElllED SATDSTINE 135 -BORING NO. 15 EL. 5600.7 FT. le: RED-BNOTN FINE SAND AND SILI,ItEDtt[t OEIISE GETDTNG CALCTREOUS TIMI CATCITE S"RINCEAS GNEEI, I{E;IfHERED CHYSTOIIE GREEll, lltai: tO !{EDIUI!-GRAINCD sA.rDstoNE CNTDAS YELL CEUEN?ED HOLE COITPLETED t/17l7715- LOG OF BORINGSo DAITES e raooEE Ilro.r I PLATE 4.7 BORING NO. 16 EL. 5597.5 FT. BORING NO. 18 EL. 5608.5 FT. 30- BORING NO. 17 EL. 5s82.0 FT. RED-BR0rN FINE SAND AND SlLl, I{EDIUI{ DENSE CR.ADINC CALCAREOUS IJITH CA!- CI?E 3tR!NGENS GRAOES OENSE PALE 6REE:{ ?O I{HITE, PTNE tO COARSE.CiAINED SN{DSTONE, IITER. TA?IITG ,J,ELT-CAMENTED ANO POORLI. CE!'IENfED EANDS tEco[Es coir?INuousll t{ELL- CE.lEilTED uoLE cosrPLElED 9/10/77 .{O GNOUND NAIER ENCOUNTENED p !.uqL = troo 5r-105 I ,6 iED-BROW.{ FINE SANO AND SILT GRADING CALCAREOUS WI?H CAL. CI?E STRINGERS ANO INCLUSIO$S CREEX. FINE IO }IEDtU}I.GRAIIIED SANDSIONE. INIITALLY WEATHERED, CRADING I{ELL CEIIEIi?ED LAYENED POORLY.CETESTED ANOrELL-CBYENTED, POSSTBLY SOIIE CIAY- STONE IAYERS TAYERED rELL'CEHENIED ANO vEnl IIELI-CETIElITED IIOLE COMPLETED 9/I7l?7 NO GROUND iIATER E!(COUNTEREO I I REO.BRCr,N 8IilE SANO AI{D SILT, trcDloll oENSE 6RAO!N6 CATTAREOUS rttH CtI.-CI?E STRTNGERS OFF.}IHITE, POORLT CEIENTED, TEATTIEREO SANOSTOTIE IIITH IAIERS OF TEA?XERED CLAYSAOilE GREEI sAilDSlOUE GREEN. T'EATI'ERED CIAYSTONE I{ITTI O*Ar.IGE IRON SIAINING 15- 12. 9t-r. t8l BORING NO. 2I EL. 5584.5 FT. o:l{ l5- BORING NO. 22 EL. 5585.3 FT. RED.BRO'iN FINE SIND ANO SILT, LOOSE To UEDIUII DENSE GREEN CLAY TitTH SOI{E GIPSOI.I CNTS?ALS, (tIEAlHERED CIAYSTONE} STIEF fO VERY SIIFE GREEN, 'INE CRAIXED, XEi'THERED SANDSTONE BECOUIS fltl,I.'CE!{EIIED HOIE CO!.IPLE1ED 9/17177 NO GROUND IIATER ENCOUNTEREO NED-8ROf,N 'IIIE SA"IO ANO SILT GiAoING CAICAREOUS liltH CA.L- CITE STRINGERS GPJTDES CIAYIER LIGHT BROI,IN TO OFT-WHITE, SILTT CLAY GEEE!', Ft:iE G:IAI3ED, iJEI'IIIdRED SA}IDStONE TITH 8IG}I CI.AI CON?E[", POORlY-CEl{EIITED BECOIIES 9ELL-CEMEIIIED EOI.E CO$PLSrED 9/t7l77 $O GNOOUD IiAtER EIICOUNTERED DADiES I DarO(rRE 60/616. uoLt, @tPLstED 9/L7/77 UO GITOUNO TAAER EITCOUNTERED EUL- IUcBORING NO. 20EL. 5570.4 FT. 30/8a. 55/616. 23- RED-IROI N PINE SANO AllO SILt,t OSE T{, tlEDIUl{ DENSL Ltctlt !ROI{N, rrNE tO UEDttl{- GR.AINEI' SANDSTONE, GRADINC NELT- CEMENAID BOLE COTPLETED 9/17/77llo cRfl'IID TATER EIICOUNIARED PLATE 4.8 l0- LOG OF BORINGs BORING NO. 19EL. 5500.3 FT. I I .l l' 987l TED-BROIII{ TINE SAXD AND SIL?,IGDIUII OENSE GRAOTNG CAITAREOUS lft'I CALCITE STRINGE8S CNAOES VSRY CAI'AREOUS ANOVENY OENSE BECOMES VERY LOOSE, POSSIBLI..{ttH lrolJs BECOileS DEIiSE 6BEEN, FINE TO !{EDIUI-GB,AINED SANDS?ONE, I'EAIHLRED, I{ITH SOI{E ONiNGE AND YELIOIj IRON STAINIi{G GRAY-CREEN, PINE AO NEDIUU GNAINED, SEA?SERED, CIAYEI SANDSIONE IIITII ORANCE AND YEL''h !RO!I STAINII|C IECOI.IES LESS XEATHERED rIIH LESSCIAY, PREMMINA.YILT CiAY HITX ORANGE IRON 51AINING, !.OOERATELI CEITENTED, I'EOIUII GRAINED IODERA?ELI'TELL.CEHENTED CONCLOITTER.ATE OR FRACTI'RED SAUDSTO!{E GfuTOI$C EETAER CETTENIED GN,AOING LESS CE}IEITTED VERY POORLY-CEII{EIIIED SANDS?OIE I{ODEF,A?ELI-CE!{ENTED CI.AYSIONE POORLY-CEMENTED SANDSTONE llITH IIINOR IIARD LENSLS T ODERA?ELI-CEUEI\TED SANDSTONE GRADES LESS CEUEII?ED APPEARS CI.AYEY TPDERATELY-CEIIElrAED SANDSTONE 100 lt0 U Etos FEEEt I I 1o BROTN-YELIIII. COARSE-GRAINED SANOSTONE FINE GRAVEL CONGI'IEFATE rlill CONSID- IRABLE COIRSE-GRIINED SAND AND CAL- CAREq'S IIA?RIX BROI'il !O YELIOTi, COARSE-GRAINED SANTF STONE I{I?II CONSIDENAALE HEAR HORI. ZONTII TRACTI'RING AND SOME ORANGEIION STATNIIIC, TIOOERATELY CEUENTED $ATER REIUITI CO}IPLETELY I'ST LIGllt GRAI, llEDlUl{ TO COARSE-GRIMED SAilDSIONE, lllctlLY FRACIUREo ALONG llORIZOllfAL BEDDINC, CONSIDEn\BLEL:!OXIfE S?AINING ALONG EEDDINGfRACtgRES, !,PDERATELY CE$EaaED tO uilcErEr.rlED, CORE T SSES ASSUI{EO DUE IO NASAIilG ANAI Of UNCEUE$AED lOlrErs LIHITED HA?ER RETURN tEcoarEs vERr uscEuEdaED, t{ATEn RtIUnll LOS" fOLl I,SA At ?2 ltt BOLE l9A D'ILLED I' r! SOOTH O? HOLE 19,M' T'ATER REIURN OSTATNED, NO Sx,tPLlNG PoSSIBLE, coLE LGGED Fnox tRtLL!!{c PRoCRESS VERY iIELL.CEiEI{IED SANDSTONE (?2 'T'IODENATELY.CE.YENIED SANDSTONE (73 FI' AECO}IES I.ESS CEITENIED ANO CIIIEI noLE cotrPLttE.o 9 / 25/ 7 7 GROUND HATER LEVEL I.IO 'I, IL/4/77 POORLY-CE!.IDNTED SAI{DSTONE TI1I OCCTSIONAL BT"\DS OF GRAVEL OR CONGI.()HERATE VERI I{ELL-CEIIIENAED SANOSTONE VERT POORLT.CEHEN"ED SANDSTONE VERT tlELL.CEl'IErfaED SANT'SIONE DAiTES S L(o()FE ll0 - I I io 80- LOG OF BORI NG5 PLATE 4.9 BORING NO. 23 EL. s555.9 FT. BORING NO. 27 EL. 5555.0 FT. l0- BORING NO. 29EL. 5655.0 FT. (APPROXJ iED-9RO'.il| FIXE si:io ANO SILT, I,OSE 10 MEOIU:{ DEI-5E CRTDING C]\LCARSOUS WITI CALCITE 5?RtNGERS cs.aE:;:s8. Fl.lL io :.tEDluM-clArliEo SL\:DS?ONa, VenY rELL-CEUEITED HOLi COtELE?=O 9/17/71 NO GROUND IIATER E\COUNTERED 1 ,o RED.B(!I'J IINE SAND AIID SILT, rcOSE m ilEOIUI't DENSE GRADING CALCAREOUS I{ITII CAL-CI?E gIRINGERS GRADES l,tEDIUll-GRAINED HO?TLED COLORS FRO}I RED IOiIHITE IND YELLOIdIELLOT r() LICIII EROHNI IitEDIUt{ ?OCIAR5E.GTIINED SAND (IdEA?I{ERED sAilDStOlrE' L GREEI TO rIITE r,(}rrLED CLA!(WEATAERED CIAYSTONE) OFT.BHI; TO YELIOII 8NOTN, }tEDIUlt!O COARIiI-GMINED, P@RLI CE!{EN?EOsAlrDstsg, GRAoES rEtL cElttlrTEo gg =5 Lga EUL--5 AUA HOLE COTPLETED 9/IOl77 NO GNOUND rrATEN ENCOUNTERID BORING NO. 24EL. 5573.4 FT BORING NO. 26 EL. 5s78.3 FT. RED-BROL! FINE SANO AND SItt,IOOSE ?o TEDIUH DENSE GR^Otlr6 CATCAREOUS XtTlt CALCITEs?tn{GERs OI'.TnIITE. IINE CRAIIIED, I'ETT'TEREDSlNDClOill, GRADES IIELL-CEIIENTID oFF-},l|l?!. FINE m ]tEDItH Gi.tIl{eD,IITOERAIELI IIELL-CEIiENaED SAIDSI()$E LIGIII BN&'N, PTTIE TO }IEDIU}I GRAINEO,l{ElL-CEl,tElTED SANDSTOIIE flol,l cor,rtIJTED 9/17177 I'O GBOUIiD TATEN ENCOUNTCRED 20- lo- RED-BROIIN FIIIE SAND ANO SILT, Gf,ADES I.IEDIU!{ DEIiSE e&9lNg gA4^Aswe. h.HI?E to SLIGTTLY TAN SAIIOS"ONE BECO!.!ES I{ELL.CE\ETTED 80LS CO!{PLE?ED 9,/30,/77 lTO GROUJD TATER ESCOUNTERED REO.BBoril FIUE SAND AND SILT,IIOSE 'O XEDIUi. DENSE GR Otr.G CALAREOUS r{ItH CttCIrE STiINGETS OIF-IIHITE, FINE TO I{EDIUH-GNAINEDSINDSIONE, rEitllERED, GRADIITIG I{ELL- CEI{EN'ED VETI TELL CEI{EN'ED ,troLE CO|{PLAIED 9 / L7 / 77llo GNOOND I.A'EN ENCOUNfENED DAlrEs e *lororlE PLATE A.1O LOG OF BORINGS BORING NO. 28 EL. 5547.6 FT. )'l o TCH LINE CRAVEL AND PEBSLE CONGI'|{ERA?E Ultfl SANDY !.U\IRIX IN PIACES UUCEUEU?ED LIGHT CIAY tO OFE.IiIIITE, PINE TO ITEDIUH-GRAIJED SAIIDSTONE. }IELL CLqEIITEO cEXERALLY LIGHT GRAY SANOSTONE TIIH OCCTSIONAL 3ANOS OP AROHN, CLATIER SA:'OSTONE GR.ADES D.IRI(ER GSAY LTGHT GRAT. IIELL.CE.IE\TED SINOS'ONE lo I T I J. I 9a8l RrO-BROwtl Ptxa SAUD AND SILI. ICOIUI{ OENSE 6R,ADING C"I'ARLOUS I'ITI CAI.CITE STRTNGERS GRAOES LICI{' EROIIN ANO VERY DENSE SECO!{ES LOOSE BECOIIES VEnI DENSE OIIIIGE TO YELIDfl. IIIEDIUIi TO EINE GAAINED, SILTI SAIID (IdEATHERED STrlD3T!NEI TJGTI GNEAXISE-GR.IY, IINE TO !E!)!UU-GMINED SAIiDSTONE HITH SIX{E GIAVEL TO PEaBLE-SIZED IN- CLUSIONSt SOiIE tlIltOR LII.IONITE Sr.\tNINC, FR.\CTuRSS lloRlzONTtL LIGIII GREEI. FIIIE-GRAINED SAND-. STONE illltt IIYERS Or GREE!{ CLAI- SIONE UP I{' { TNCHES THICT TGDIUH 'O LIGTTA BROT'8, TEOIUIT TO COARSE 6NAINED, IILL!-CEIEMED SATIO' SIONE, IRON STAINING EI'IDENT AI CONTACT HITH OVERLYTNG FINER- GIAINED SANDSIONE ctRcutaTroll Losr LIGIIT CRAY, IIEDIUII IO COARSE- GTAINED SANDfTONE t{IfU SECaIorrS OF tERr POORLY'CE|IENTED SANOSaONE INIERIr\'TERED' SOORLv-CE:IL\"EC,U:D rELL-CEMEN?EO SANOSTO.{E AND CON' GI'!{ER,ATE CA3ING INSIAL',ED TO 7' FT GeouNo rATEn rEvEL 75.7 77, LL/a/77 MATCH LINE Hr03! = Fctlr0 LTGHT GRAY, IiIEDIUil CEAINED, TELI' CEYETnED SAIIDStONE, FRACn RES GE:JERALLY I{EAR HOIIZONT;T I I I I U5f- tsarya I b 135 - BORINGS goi.E cot PLEtao 9 / 2L/1 7 EDAiIES g rirOONE LOG OF PLATE A-T 1 { I ) I I I I.{ I I I I t' I Taa &I Ir. bE 3oGU6EUUGIGg oUc6UG& { ao FtF.0!i, E @I ( ) Uq tJtt FoUto E irr& "l :11q $lg il ilslH $l llill ,r *l{li * j'{13 uJ II3 EIh'r g:F qeF Eitr ir.x \,q .Fo UJ l!o UIo. F o(J J x (rF o E 4tDg, (t,-p .FooolrJ t!E> g1 Fo -rP<F;ro-23 =x = o\i\;l / -l\l / ( lr 1\ rof JSX.SS3uls uv3Hs ooIl,Fo;3,Ea'oF(,Jlr, <rrFlrolr, F a\rO{o=oOz(/)FUJ 6 o o FFEoo 3E= uro=E.,3 8 6 BJtuiI=e EFO 6b \-; a b :I6 ld I ct E 6 IEo E6 $ =) IF I. FE,r8llHllt-dF l33' 1"1:t{O rl+la cA ffi9,1 trd4 =ldI h'F . FEts=iuH< >- E.F oF E' v?, .EU'FOO ar,G lr,o F>(aF(,J6 =[811o: 2=, =i I 3 '"/\:l / tl r \t 1\ \oIo o AN JSt'SS3UlS uv3Hs oolrlGU,): toab!elrj F:oF31 J 14(LFEOUJF bFuJ(/)FZ 6H 3,3r!i(ETgk2.,o-OF r3FrrJai oJ tr6 qZ- =o \r ( I I I 10 { I t{ i { I I { 1 I p h97%Wryq9w-4,9ru',^,h SECTION 5 TEST PIT LOGS From Report Second Tailings I I 1 Phase Design Management rcel I 3 System lYhite Mesa Uranium Blandlng,Utah I I{ Project i t' I '1 E-nergy Fuels Nuclear, lnc. Fenv-er, Colorado I {t Test Pit No. 4-I 4-2 4-3 4-4 4-5 4-6 4-7 4-8 4-9 D4.I w-2 D4-3 1 t I 1 I i I I { 1 I TABLE OF CONTENTS SA}IPLE NO. 1 DEPTH 10"-12" JAR 22"-24" 4t 6tt A 5t-5t6t' 3.82 CaCOU 8r4rr 5 10'4" ConsistencY of soil but intact laYering B 10'-L0'6" 9.55,2 CaCO, JAR BAG JAR with BAG ENERGY FUELS NUCLEAR RM78-682-C T?ET DTTl-Jl a Ia -I S:IEET I OF 2 $ b t OATE BEGAN LILLISL pArE FTNISH eD I JJJ-LJfl- l"ouno suRFAcE EL.:il4 TEST PIT N -3r9.590f NO. a-'r E@ rtELo ENGINIEn'R. Greenwood cHEcrtu rv. R. Greenwood I ELEV! rreerr DEPTH (FEETI PROFILE OESCRIPIION Hr MAFX5 I I I I )) 't?-0 "Same as abovetl 13.51 1a n Soft yellowish brown sandsEone. Weathered 16.0 r Intact, Easy rJ.PPabIe Rlpping becomes dlfflcult 15 .0 16.0 r' ._ . j ". a1-': '. -':.' .i..:. : i: .i I I I I I I I I I Bottoo of test Pit16.0' iNERGY I{'ELS NUCLEAR BM78-682.C TEST PIT NO. 4-L sITtsLI Z UI ..,ArE BEGAN'JJJ-!J3)- ;::I.:;"Tffi TEST N -319 , 9501 PIT NO. E*2 L-2 ,577 ,9551 FttLo ENGrNtea: R. Greenwooci cHtcrt,t) nv. R. Greenwood ELEV TFEETI OEPTH IFEETI PROFILE oescFrP?toN f{e MARI( 5 1-0 Red sandy silt. DrY vl roots to depch 'r.ol SA}IPLE NO.DEY'TH .! tr.E A 2',-5' 2.32 CaCO, I 3' BAG JAR 5t8tt JAR 2.O 3.0 ll tt -lt $ lf .''tf {i' Mediun dense red siltY sand. tloist. 5 .7', to cs76 4.0 5.0 6.0 Soft yellowish brown sandstone 7 .O'7.O BoEtoE of test pit 7.0 | EIiERGY FUELS NUCLEAR R}t78-682-C TEST PIT NO.4-2 SHEET t 0F I oArE 8EGAN,J14I3I- ffi:ffi:^ffiL TEST PIT N -319.552 I NO.4-3 e@- ttELo €NGlNtEn: R. GreenwOOd cxEcrt,urtY.@ ELEV {FEETI OEPTH (FEETI PROFILE oESCFTPilON Hc MARKS 1.0 '.' . : " ' -.-.'.t!..r;r, /+'.-.;tl: .ts ./-'- llediurn dense red sandY silt. Dry. Roots to dePrh 1.3' SA}IPLE NO.DEPTIi TYPE 1rStr JAR BAGA 2t -3'4" 21.6'l CaCO, 3tg"JAR 10 t5 ::'... .. ., ' ..t. .' ;5i.. t5..:' :I} Mediuo dense red-$hite silty sand. VerY calcereous 3.3' 78 3.0 4.0 Soft greenish graY to yellowish brown claYstone- sandsEone. Weathered 5.0r II .l I I I I t ,l ,l ft'l 5.0 I BoEton of test 5. 01 Pir ESE.AGY FUELS NUCLLA,R RI,{78-682-C TEST PIT NO. 4-3 S:::ET I OF I l-I orre 8Ec^il:-i-l!4L8-L- !l"or"o ,r^r^.GL:- TEST PIT N=::S-:AU- NO. 4-4 e:Z-SZld- FtE,Lo ENGIN8€n:R. Greenwood cH€crEr)rrt.@ ELEV IFEETI OEPTH IFEETI PEOFLE DESCRIPIION ttc MARI(5 s580 'to . ...)J 'tf ' .'.J -.. .. ,, '. t t llediuo dense red sandY silt. Dry. Roocs ro dePch 1 .5' SAMPLE NO.DEPTH TY?E 2, L,, 3t JAR BAGA L.7Z CaCo, 5t JAR ))/o 2.0 15 .': ." : ; 'l j.. .5J .'.{s':.:.' O"rr"" red-whice silty sand. Slightly calcareous. DrY 2.7 | 3.0 . tt a- : :55 11 .:11.'.'. . :' . . . j.. .. ,' (t. -..11'.'.'.' .....j..,J. (t l.lediuu dense red siltY sand.. Moist g.0t 4.0 5.0 ,l I l i I { 5572 I I 6.0 7.0 8.0 9.0 Soft yellowish brown sand- stone. lJeathered 12.0' 10.0 11.0 12.0 BoEtom of cest pit t, nl l.-4llrt' ENERGY FUELS NUCT.EAR RM78-682-c TEST PIT NO. oArE 8EGAN,Ll)Al&)- ArE rrNrsHEo,!}!|,L o SUBFACE el.:- 5578' TEST PIT N - 3l-q.750 I NO. a-i E*2.576.7431 61gL9 6u6rNtER' R. Greenwood cHEcrE,t) rtY. R. Grggnwood SA},IPLE NO.DEPTH TYPE 2', A 2.97. CaCO^5 2 3t-5 1 4t BAG JAR E}IERGT FUELS NUCLEAR Pl,{78,-682 I _t r--I oArE sEG, ,1":::l: x,-L/J4L8l- xeo,-]J-I4!.1- JBFACE EL.:-i579 t TEST PIT N-1'lQ-q4?| NO. 6-6 E - 2.577 .078 I FltLo ENGlNtg6, R. Greenwood cH€crED rv R' Greenwood | ;::;,OEPTH { FEET)PROFITE OESCRIPIION llc MARK 5 5578 5574 1.0 ,-....,.. .';.. .'....?l '*..)).... .... ,r;.!1, ,tl:c;..'ru.'-' lediuo stif f red sandY s ilt 2.01 S.tr}IPLE NO.DEPTH TTPE 3t JAR A 32 CaCO, 2 4' 4.5' BAG JAR 2.0 3.0 . '$ 5 :' :::.5$.', ,r5 .15 Dense red-wtrite siltY sand. Dry. VerY calcareous 3.7', 4.0 t . .'5i: 55''::..'.: .5 5. .:,5. 5S :. tt; ,[,: Mediun dense red siltY sand. Moist g.0t 5.0 I l I I 6.0 7.0 8.0 Soft yellowish brown sand; -.I .5' BottoE of test pit 9.5' I l, I I ) ENERGY FUELS NUCLEAR P{78-682-C ffiErtoFl I I l'5i- L rl 580 TEST PIT NO. A-7 N - qro. oro' Ll;lS-Slt- tlgLo ENGINI€n: R. Greenwood cH€crEr) rv R. Greenwood J I ENERGY TUELS IWCLEAR RM78-682 TEST PIT NO. 4-7 SHEET 1 OF OATE BIGAN: 1/15/81 lrre rtxtsxEo,J,!!!$.l- tor*o suRFAcE er..::i58i- TEST PIT N ^,319.918' NO. _ 6-8 E - 2,57 6 ,056 | FrELo tNGlNten: R. Greenwood cx€crEt) tlv R. Greenwood ELEV IFEETI DEPTH IFEETI PROFILE OESCRIPIION nc MARK S I I I 1n 5 t., :'5 5' Mediuo stif f red sanciY silt. Dry. RooEs to dePth 1t SA},IPLE NO.DEPTIi TYPE 2'JAR A 3t-6' 7.Zfl CaCO, BAG 4 r5''JAR 6'JAR )n : .' .'ii: '..t( . :'::' l':::lit;' Dense red siltY sand. DrY' Sooe nith wtrire sEreaks 2.7' 3.0 Loose red siIcY sand. l,loist. Soue I'hite str2aks 5 .0' 4.0 5.0 5.0 55.:. tt' :.".',': lf Dense wtnitish red siltY sand. !{oderatelY calcareous 9.0' 7.0 8.0 9.0 I I 10.0 Soft yellowish brown sandstone 10.0 ' Boctom of test Pit 10.0' 4-8 SHEET 1 0F I E}IERGY FI'ELS NUCLEAR RM78-582-C TEST ?IT NO. oArE 8€GAN'-LJ..ill8J- ELEV lFEETt TEST PIT N z?1o Tnqr NO. _ a-!_ E - ? ,171,650t FTELO tNGlNtEn: R. Greenwood cH€crtulrY @ SAMPLE NO. JAR 4t-81 BAG alZ 4l 247 CaCO, 7' F I ENEN,GT FUELS IWCLF{R RI'{78-682-C TEST PIT NO. 4-9 StlEET I ld;:*l rN,UJ.3J8J- ixED:-!!!!!l- - --- lURFACE EL.2- ))!!- TEST PIT N -ir q.?qo t NO. p4-1 g:A;ZZ*g.re-d FrELo €NGINEEn: R. Greenwood cH€crED flY R. Greenwood I :levI rreerr OEPTH IFEETI PROFILE OESCRIP'ION Itc MARK S I I I I sstal- t I I' b t' [. s57o I I I I 1.0 Il:-' :r... t5' :55.:-. Sriff red sandy silt. Dry. Roots to depth r. 3' SA}IPLE NO.DEPTH TTPE 2t |tt JAR ST-1 3t-5t 3"Shelby 4t 2tt JAR 7t2tt JAR 2.0 Dense red siltY sand. Drv^ L.9t 3.0 . t,.. :55 j rt :5i lediuu dense red silty sand. l{o ist 3r 4.0 5.0 Very soft greenish graY claystone. !bist 7 .O'. 5.0 7.0 8.0 Soft yellowish brown sandstone 8.0t BoEtoo of tcsc pit 9.0 | j : II I I a t' E:iER.GY EUEI.S MiCI.EAR RM78-682.C TEST PIT NO.D4-1 SEEET I OF 1 oArE BEGAilTJJ)LJ3)- \re rrxtsxeo !W- 7"or*o suFFAcE EL.:-*s:^L TEST PIT N -?1o aaq I NO. n6-? E-JsJ)s!- FrELo E NGrNr E R'3.r-gIsg@ cHEcrEt, ttY E-. Greenwood ELEV IF€ETI OEP'H lFEETt PROFILE o€scRtPrtoN IIcMARKS 5570 1.0 2.0 ,-, : ((.. -.. .- ll.'... .' :' .-.. .(.;--'.a ..!:'5t :,EI Mediuu stiff red sandY silr. Dry. Roots to dePch 2.01 SAI'{PLE NO. LEPTH TYPE 3r JAR sT-1 2 sr-2 5'-71 p' 6r-8' 3" Shelby JAR 3" sherby gt JAR 6 3.0 'J$:; Dense red siltY sand. DrY. SEreaks of rtrite 3.0' 4.O '.. .'. : 55j. :J 5'.'1.;:............ ":'. "'' si, i'..'.'i..'"-. :Ji.,:',...1. ..'.'-. .:' ::';'it: :1'. ".. .'. : : i,,.ir 'l i lGdium dense red siltY sand. Moist. Streaks of rtrice 7.0r 5.0 6.0 7.O 8.0 : i55 ;:-t5j Dense red silrY sand. DrY 9 -711 9.0 10.0 Soft yellolrish bror*r sandstone 11.5' l 11.0 Boctom of test PiE11.5t FTEST P 2SENERGYFUELS NUCLEAR RY78-682-C i^ie aia^n' Ll7518t lr, ,,*,rr5s3 1/15 /8r ., Snouxo suRFAcE Er-.::55.78i- TEST PIT IN - 319.430 NO. -94-,LEr2 .57 5 .315- FIELO €NGtNtER: R. Greenq'ood CHECr t,t) fiY, -B--13rr:.eauo.d- ELEV (FEETI 74 OEPYH (FEETI PROFILE OESCRIPIION l{c MARKS 1.0 :.*t':.15i: ,:iit-;:i:x i\i.', !{ediuo srif f red sandY silt. Dry. Roocs Co dePth 1.0 r SAI'IPLE NO.DEPTH IYPE 2',JAR sr-1 3 r 6rr-5 r 6rrr 3"sheIby 5r JAR 2.4 f.k (".;; ': ."'', t L.'' '. .''-'. '.:.55: Dense red Soae rooEs silty sand. DrY. 1 -71 i:ll .'.:. : $! '"iJ.'.;;: Dense red siltY sand. DrY. SEreaks of $hite. SlightlY calcareous 3.3r 3.0 4.0 Mediuu dense red siltY sand. Moist 6.0' 5.0 5.0 7-0 Soft yellowish brown sandstone 7.0' f Bottor! of tesr pit 7.0' E}IERGY FUELS NUCLEAR RM78-682-C .TECT DTTl!95 - al NO.D6-3 Etrr=r 1Jlt!& - -0! I P I i SECTION 6 ROGERS AND ASSOCIATES ENGINEERING CORPOMTION Letter Dated March 4, 1988Letter Dated May 9, 1988 Radiological Properties b I t ,l I' t I t p R AA E Mr. C.0.Sea'ly Umetco Mi neral s P.0. Box 1029 Grand Junction, Dear ltlr. Sealy: to four samples shipped to .ts. Diffusion (g/.r3) Coeffic. Densitg Moisture Emanation Fract ion 0.19t0.01 2.0E-02 I.4E-03 1.6E-02 4.5E-04 I .6E- 02 Sampl e Tail ings Composi te Site #1 Site #4 (2,3,&5) The sampl es wil I be any questions regarding Radi um pCi /sm 981t4 1.45 13.21.44 19.1 1.85 1 .84 1.851.4E-03 1.84 shipped back the results on 1.1E-02 1.65 "' . 15.44.2E-04 1.65 19.3 to you in the next few weeks. the sampl es p1 ease fe61 free Si ncerel y, RYB/b Rogers & Assoeiates Engineering Corporation Post Office Box 330 Salt Lake City, Utah 84110 (801) 263-1600 March 4, 1988 c8700122 Co rporatio n c0 81502 }le have compl eted the tests ordered on the The results are as follows: 4,-tlfu Renee Y. Bowser Lab Supervisor 5.5 12.5 8.1 t2.6 Saturation 0.39 0. 55 0.40 0. 75 0.48 0.76 0. 53 0.80 If you haveto call. 515 East 4500 South. Salt Lake City, Utah 84107 Ip R A E Rogers & Associates Engineering Co4loration Corporaii on c0 81s02 Post OfEce Box 330 Salt Lake City, Utah 84110 (801) 263-1600 HAY ls $88 May 9, 1988 Mr. C.0. Sealy UHETC0 Mi neral s P.0. Box 1029 Grand Junc'ui on , Dear Mr. Sea'ly: c87001 22 The tests for radium content and radon emanation coefficient in the following sirmples have been completed and the resul'us are as follows: Radon Emanation CoefficientSamp'le Random (2,3 & 5) Siie ISite 4 If you have anycall Dr. Kirk Nielson RYB:ms Radium (pCi/s) 1.9 + 0.12.27 o.l 2.0 T 0.1 0.19 + 0.04 0.20.T 0.03 0.1r T 0.04 questions regarding these results please feel fnee to or me. Si ncerely, 4,^ qo* Renee Y. Bowser Lab Supervisor 515 East 4500 South. Salt Lake City, Utah 84107 a !!o =o x CJ \- Data presented jn this section was gathered and assembled several years 3g0, and may not reflect current evaluations. Where conflicts exist, contemporary sections of this License Application should be considered "control1ing". 2.6 HT'DROLOGY 2.5.1 Ground Water ltydrology 2.6.1.1 Regional Occurrence and Dist.ribution of Ground l{ater The occurrence and distributioa of ground trater in the region encouPassing the Blanding area are influenced by the type and extent of rock fornations and the structural features naking up the Canyon Lands Section of the Colorado Plateau Physiographic Province .(see-section 2.4). rn general, the rock formatione of the region are flat-).ying with dips of one to three degrees. the rock fomatiooe are incised by strea1s that have forned canyons betveen intervening areas of broad Eesae and buttes. Aa intricate systeu of deep canyons along and across hog-backs and cuestas has resulted fron faulting, uprrarps and dislocetiou of rocks around the intrusive rock masses.such as Abajo Uountains, approxi- Dstely 25 rniles to the nortb of the project site. raus, the region is divided into numerous hydrological areas controlled by structural features euch as the san Rafael Swe11, the Monument upwarp, and the Abajo, Eenry and La Sal lIouotains as lrell as the faulted anticlines in Salt, Spanish aad Lisbon Valleys. ( ) 2-116 WaEer-bearing sedinentary rock formations of Cambrian and Devonian through Cretaeeous age are exposed in the region or ha're been idencified in oil we1ls in the Blanding basin. Data on bedrock aquifers for nost of the region are sparce and that information available is largely restric- ted to wells located in only one or t\ro areas that are not near the project site. Bedrock Aquifers Oa a regional basis, the fornations that are recognized as bedrock aguifers are: the Cretaceous-age Dakota sandstone and the upper parl of the Morrison fornution of tate Jurassic age; the Bluff sandstone, the Entrada sandstone and the Navajo sandstone of Jurassic age; the l{ingaEe sandstone and the Shinarump member of, the Chinle fornation of Triessic age; and the DeChelle menber of the Cutler fomration of Perraian age. These uniEs are shown in Plate 2.6-L, a generalized section of strati- graphic uniEs including water-bearing units in southeasEern Utah. Other fornations within this sequence aLso contain vaEer buE its quality varies from slightly saline to very saline. Underneath the Pernian Cutler formation are saline water-bearing units within the Rico fomation and the Hernosa forroration of Pennsylvanian age frou which oii is produced in the Blanding basin. There are no available reports with quantitaiive data regarding transmissivity, storage and other aquifer characteristics of najor bedrock aquifers in this region of southeastern Utah. Some data on the reported yields of wel1s are contained in older geologic reports (Goode, 1958; Feltis, L966; and Lofgren, f954). For instance, according to Feltis (1966) the range in yield for six wells drilled into the Dakoca sandstone and Burro Canyon formation east of llonticello varies fron 22 to L25 gallons per minute (gpm). Tlro rrells drilled iato the Morrison fomation in the eane area yield 15 to 22 gpo whereae, in other areas of San Juan CounEy, Utah, the yield from welLs drilled into the llorrison is I or 2 gpn or 1ess. o o) q k= O *gq EE fRI-t-uvtur'r.\ \ f"o*t Dakota ss -/ to greayield. qual i tyin the q) tr', ar1 d.J F) Morrison \Jf fornnt'ion \ Bluff sandstone [oAroTA san{ formatiI avail ab f^r,r-- ^-,, Surnmervil le fm \ NEntrada ss uarmel fm Navajo sandstone \ lDLUrr 5dil(J\{ water. , I and wei Kayenta formation (J tl,a Hd.F l.lingate sandstone pota and reac centin B \Chinle formation Shinarump member Ivloenkopi formation NA v v I: 7- H d. trJL De Chel 1y member Cutler formation til \ Rico formation \ z, talo- Hermosa formation GETERIIIIED STRITI G GEOLOGI C AGE *= Source: After Goode, 1958 . Provides small quantities of water shallow wells. Such wells are subjecteat seasonal variation in amount of. The water is generally of poor ty--probably owing to the sulfate salts e Mancos shale. sandstone and upper partation. l.later of fair tolable by pumping. of l{0RRISON poor quality ndstone. Artesian aquifer,. Supplies a spring east ofeils south of Hatch. potabl e BI uff ERIIIIED STRITIGRTPilIC SEGTI(}T SH(IWI]IG TRESH IIITERBEINITG U]IITS IT S(IUTHEISTIRil UIIII sandstone. Artesian aquifer, ble water. Crops out in western southern parts of area but base hes depth of near'ly 1500 feet inral part of area (near Aneth field landing basin). AJO sandstone. Artesian aquiferyielding good quality water. Cropsout in western and southern parts of area and reaches depths of 1.850 feet near Aneth oil field. IIINGATE sandstone. Artesian aquifer Provides good qual ity water for wells in vicinity of Bluff. INARUMP member of Chinle formation and DeCHELLY sandstone member of Cutler formation. Locally provide good water where they are near surface, as invicinity of BIuff. DrrU:3 I rtO(OfI o I 2-1 18 Likewise, the Bluff sandstone, found only in southern San Juan County, has reportedly yielded 13 and 25 gpn in two we1ls drilled near BIuff (feltis, L9662 27). The Entrada sandstone is reported to yield an average of 143 gpn at five we1ls drilled in San Juan County, but yields as high as 1200 gpo have been reported in other areas of southeast Utah (Feltis, 19562 27). Ttre Navajo eandstone is oae of the most permeabte bedrock aquifers in the region,ritt reported yields as high as 1335 gpm (l'eltis, 1966: 26), although nany wellg drilled into the Navajo in southeast Utah only have yields varying between 35 to 72 gpm. Ttre Energy Fuels ni1l site well drilled into the Navajo sandstone is reported to have yielded 120 gpa after 1.5 hours of ptroping shortly after iE was drilled. Throughout the region, smatl quantities of water are produced from shalloh, wells constructed in the a1 luvir.rm that occurs in streao valleys and a veneer on the flat-top El€8!18. These wells are subject to greaE seasonal variation in yield and the uater rithdrawn is generally of poor qual.ity, perhaps due Eo the leaching of eulfate salts in the Mancos shale which is preseat et or near the eurface near stream valleys over much of the region. Recharge The source of recharge to bedrock aquifers of the region is pre- cipitation. Precipitation in southeastern Utah (see Sections 2.7.L and 2.7.2) is characterized by wide variations in seasonal and annual rain- fall and by long periods of deficient rainfall. Short-duration eurrmer storns furnish rain in snall arpas of a fes. square uriles and Lhis is frequently the total rainfall for an entire rnonth within a given area. Ihe average annual precipitation in the region ranges frou tese than 20 cu (8 in) at Bluff to Bore than 41 crl (15 in) on the eastern flank of the Abajo Mountains, as recorded at Monticello. Precipitation at the project site is discussed in Section 2.7.1. Ihe mountain peaks in the Henry, La Sal and Abajo Mountains may receive trore than 76 cm (30 in) of 2-1 19 precipitation but these areas are very small in couparison to the vast area of much lower precipitation in the ragioo. Recharge to bedrock aquifers in the region occurs by direct infil- tration of precipitation into the aquifers along the flanks of the Abajo, Henry and La Sal llountains and along the flanks of the folds, sueh as Comb Ridge llonocline and the San Rafael Swell, where the perrneable formationa ere exposed at the surface. Recharge also occurs on the wide expanses of flat-lying beds that are exposed on the mesas between these major stnrctural features. In these cases, sone precipitation is able to percolate through the near-surface joints and fractures in the Uancos Shale and Dakota sandstone, where it circulates according to the local ground water regime. 2.6.L.2 Regional Utilization of Grouud I{ater Rainfall throughout Eost of the region is inadeguate for growth of crops so that irrigation is neceesary in most locations, except in a snall area east and southeast of Monticello. Ground lrater is utilized for irrigation, livestock, doaestic needs and more recently for uunicipal water supplies. Present Use The area of greatest present developuent of ground water use in the region is in the Blanding basin, an artesian basin east of Conb Riilge in San Juan county (eee Plate 2.4-L io Section 2.4.1.I). Within the Blanding basin in the areas of Honteztrna Creek valley and south and east of Blanding, there are E nuuber of deep wells which derive good quality rrater from the deep bedrock aquiferal i.e., the Entrada, Navajo and lrlingate Sandstoaes. Ttreee rraters are used for irrigation and doroestic needs of residents in the EE€8. Ttre estirnated total aoount of ground nater withdrawal of all these deep bedrock wells in the regioa is unknown but considered very small compared to the total emount of water available in the aguifers. ( 2-L20 Within the last year (L977), a few deep- wells for nunicipal water supplies have been drilled into the Entrada and Navajo sandstones near Blanding and Monticello, utah. The present usage of these wells is not known. Blanding compteted one deep well (960-foot depEh) in 0ctober 1977 and anticipates drilling three Eror€o Monticello is currently (fal1, L977) drilling a nelr 1000-foot deep well and anticipates drilling more as the need occurs. I{ater from shallow we11s, drilled principally into uoconsoli- dated aluvirn overlying the bedrock in Eany areas of the region, has been used from the earliest days of settlemenE to the present as a source of douestic and stock water supplies. Some of ihese shallow wells, uostly less than 150 feet deep, have been drilled inEo the saturated upper Portion of the Dakota sandstone which directly underlies the l,Iancos shale throughout nuch of the region. Ihe estiuated toEat annual ground water withdrawal from these shallo!, aquifers in the region is unknown. Another area of ground water developrnent in the of the Blanding basin is the broad, flat, plain 6ast Here, the ground rrater is derived principally frour the surface alluviuu that overlies the Dakota sandstone and portion of the Dakota and underlying Morrison formation. wells in this area are shallo!, and, for the rnost part, reguirements are relatively small. region outside Af Monticello. thin veneer of fron the upper lIosE of the lrater supply fire remainder tew scaEtered sEock f,rom alLuviurn and fornation. Proiected Use The projected regional use of ground water for domestic purposes and stock watering will probably increaee at the saoe rate as population growth occurs in the rural areas outside of the three populatio:r cenEers of Blanding, Monticello and Bluff, Utah. The ground water used for these of the region is very sparsely populated with only a welts of low yields and sballow depth deriving sater the upper part of the Dakota sandstone or }lorrison 2-L2L purposes rroutd like1y be derived frou near-surface sources such as aIluviun, the Dakota sandstone, the Burro Canyon forrnation and the Morrison formation. Increases in use of ground water for irrigation will depend on the availability of land for raising of crop6 and an increase in ti1labIe acE€ag€o Eowever, no aignificant change is anticipated. Ground rrater use for municipal water supplies for Blanding, Uonti- cel1o and Bluff will increase at e rate conmensurate with the increase in population (see Section 2,?). Ttre cmmunities do anticipate drilling additional rells for water supplies to accmmodate growth. 2.6.1.3 Ground t{ater Regime of Project Site The project site, located on a flat-toP rnesa approxioately two niles wide, is partly covered with a thin veneer of alluviun which ia sone places is uaderlain by the Mancoe shale and in other locations by the Dakota Sandstone/Burro Canyou foroations. The llancoe shale containe water soluble -salte and geuerally water circulating through it becmres fairly highly mineralized. The Mancoa is not a fresh water aquifer. Stratigraphically below the Mancos shale is the Dakota sandstone, the Burro Canyon formation and the l,lorrieon forroation which yield fresh to slightly saline treter to nuEerous springs and shallow wells in the project vicinity. Both the Dakota sandstone and the Burro Cauyon forma- tion crop out in the cenyon walla and valleys of !{e6ttater Creek, CotEoff ood Creek aad Corrat Creek neer the site. ftre foruations are continuous beneath the site, extending frm the outcrops in Corral Creek Canyon east of the site to the Canyon of CotEonwood Creek and Westnater Creek rrest of the site. The subsurface foroations below the project site are represented by the typical stratigraphic rock section as discussed in Section 2.4 and illustrated in Plate 2.5-L. The knowa fresh water-bearing unite beloh, the Dakota sandstone, Burro Canyoo and Uorrieon fotmations at the site are mainly the Entrada sandstone and the Navajo sandstone as shovn on PlaEe 2.6-L and discussed in Section 2.6.1.1. There are no quantitative aquifer data available on these formations in the site vicinity and C o j 2-L22 little is knorrn of the deeper aquifers such of the Ghinle formation' as the Wingate and ShinaruuP Recharge In the Project vicinitY' the formaEion locally receive recharge flat-lYinS lt€sao Dakota sandstone and the Burro Canyoa from infiltrat,ioo of rainfall on the ,.Inthesitearea,theDakotasandstoneandBurroCanyonforrnation arewelljointedbytwojointsetstrendingN.l0-18oEandN.60-85oE(see Section 2.4 for nore detail)' fhese open joints provide paEhways for the percolationofrainfallanddownwardinfiltrationofpondedsurface watersonthesite.Ttrejointsalsomayactasconduitsfortheloca1 Bovexnent of ground sater underneath the site' The recharge area for the underlying deeper aquifers such as the Navajo sandstoae and the Entrada sandstone, as they occur within the Blandingbasinandunderthesite,istheoutcropareaofthesesand- stones along the length of Ehe north-south trending -conb 'Ridge Monocline approxirnately 8 roiles west of the project site' Ground Water Hovement TtreBoveEentofgroundwateroccurringatshallowdepthsinthe Dakota sandstone and Burro canyon formation aE the project site is believedtobeconfinedtoisolatedzoneswithinWhiteMesa.These foruationsareexposedandcroPoutinthecanyonwallsofthesurface drainagesbotheastandwestofthegite'Duetothelocationofthe site on the northern margin of the northwest-souEheast trending Blanding basin,thenearsurfacefornationsdiponeortwodegreestothesouth. Beneaththeshalloe'aguifers'theBrushyBesinMemberoftheilorrison fornation is generally irnpermeable antl there ere 1ocally irnpermeable tenses in the base of the Burro canyon fomation. Thus, !'ater perco- lating into the near surface forsrations of the project site, such as the Dakota sandstone and the Burro canyon formation' I,i!1 generaLly migratesouthwarddowndip.Itisprobablethatslightgroundwater o ) o ) 2-L23 mounding Bay occur in the east-central ParE of the mesa at the site' ( Ground water levels may be highest in the center of the Eesa, coincident withthehighestlandelevations,andlowertotheeastandwestwhere ground water can drain from the mesa through springs and seePs in the canyonsofwest,water,CoEEonwoodandCorralCreekg.TtrisisPartially substantiatedbyr,aterlevelsoeasuredindrillholesandwellsinthe projectvicinity.Severalspringsexistalongthecanyonwallsadjacent to the Project site' fr Supplenental drilling et the rnill site and tailing retention area is inforrsation on thespring of 1978 and will provide more and oovement of ground Later at the be included in Ehe SupplemenEal Report' GroundwatermoveBentinthedeeperaquifersisrelatedtothe deeperstructuresoftheBlandingbasin.Therechargeareaofthe Entrada and Navajo sandstones is along comb Ridge llonocline about 8 oilee directlywestofthesite8E€soThegroundwatermoveBentintheseunits isthoughttoProceedfrootherechargeareaeastwardandsoutheastward downdip toward the center of the Blanding basin' approximately 18 niles south-southeastoftheprojectsite.Atpresent,therearenodaEato substantiatethishypothesisasthereareneithermaPSofpotentiometric surfacesintheNavajoorEntradanorlong-ter:urrecordsof!,aterlevels inthesitevicinityforwellspeuetratingtheNavajoorEnt,rada. Ground Water Conditions at MiII Site and Tailing Retention Site planned for the local occurrence this studY will Ground iruatelY 56 Appendix H). fined ground As Part and tailing the project which $ater site. Resulte fron water is present beneath the rnill site at a depth of approx- fee" belor the land surface (see 1og of borehole No' 3 in Ttris ground water is probably the water table or uncon- ,water, although it ltray rePresent perched ground water' of the geotechnical retention site area, vicinitY and water was Present. Based investigations of the ni11 site area a nr:mber of borehotes were drilled in levels measured in those boreholes in on these water Ievel Eeasurements and o ) 2-124 miscellaneous l,aEer 1evel DeasureEeots made in some abandoned stock welts intheinrnediatevicinity,agroundwater-levelmaPwasconstructed showing rhe elevation of the water tabie (Piate 2'6-2) and indicating generalgradients.ThewaEerlevelsnappedinPlate2.6-2arafroraafew boreholesandstockwellsandarebelievedtorePresentawatertable situation and not artesian conditions. Ilowever, it is not known if the lreter table recorded in each borehole is the same and is coatinuous or whether there are a nunber of ttperchedtt t'ater tables throughout the projectvicinity.oneoftheobjecEivesofthesupplemenialinvestiga- tionsatthenillsiteandtailingsiteareasinspringoflgTSwillbe to evaluate the ground water flow sysEeo in nore detail' using the ground water-level oaP (Plate 2.6-2), Ll aPPears that theshallotlgroundl,aterformingthewatertablethroughouEtheprojecc vicinity has a gradient torard the south-southsesE' The general ground uater gradient appears to be relaEed to the general topographic gradient; i.8.1 the highest elevations are generally at the norEheastern edge of theprojectsitenearEighway4Tandtlrelowestetevationsareat the properEy's soulhwest corrlef' Based on the recorded !'aEer levels as EhownonthemapandassrningthatthewatertableisconEinuousthrough- out,thelraParea'itcanbecalculatedthatthel,atertab].egradiene under the niIl sire is abouE 0.03, aad that under the tailing reEention area is 0.01. A uumber of "permeability" teEis were conducted in boreholes during the geotechnical investigation of the ni11 site and tailing retention site. Ttre tes.s used packers in the boreholes and injection of waEer underPressureforvariousperiodsofEiroe.Theresultsofthese.'petme- ability" tests indicate thaE, in general' t'he hydraulic conductivity (,,horizonta1 perrneability") of the formations below the water tabte' on the average, ranges between 5 and 10 feet Per year' However' it should benotedthaEsomeofthepackertesEsconductedabovethe!,aEertable indicated a uuch higher hydraulic conducEivity while a few packer tests conducted both above and be10w the water table indicated a much 10wer hydraulic conducEivity for selected inEervals (see ApPendix H)' o ) o ) .Iaaa.d.a NA'tl,\/-lr GRllUXD TTTIER ttUEL TTP OT PN|IIECT SIII XEY -5520'- ELEVIITOi OF UAT€i IABLE (IEET SOVE 6U +- DtitcTrol @ SHALLoI ciilm wATEi rovEEf,T SOREHOL€ LEATIOI AXO XUSER EtCOUXTEfttC trti i! t i: .n \o\,>'\ /r,% ',.:\ / tuo'' TE 2.6-2 2-126 based on DarcYr s Law o ) Using the formula ,r=E!'e tlhere: V = the rate of movement of ground water through formation X = trperueability"; hydraulic conductivity of formation (neasured as 5 to L0 f'tlYr) O = porositY of formation (assumed i - gradient (calculated as 0'03 at Iailing retentioa site) ' as 20 percent) uill site and 0.01 at theaveragerateofgroundwatermovementthroughtheg,ater.saturaEed Portionofthefonoationbelowthewatertablecanbeestinated.Thus, based on the recorded values aod irnplied assr:mptions, it is estimated thatrontheaveragerEheshal'lo!'groundwatermovementatthenill siteisapproximately0.0ltoo.02ft(0.3to0.5c4)Peryeart'owardthe south-southwest'andEheslrallowgroundl,atermovementatthetailing retention site is approximately 0.0025 to 0.01 ft (0'08 to 0'3 cn) Per year tolrard the south-south!'est' 2.6.L.4UtilizationofGroundWaterinProjectVicinity Present Ground l{ater Uge ffidwaterappropriationapp1icationsonfi1ewith the utah state Engineers office for withdrawal of ground Later within a 5-ni1e radius of the project site. Most of these applications are for smallwellsoflessEhanl0gpn.llretotalgroundwatercithdrag,elof the weLl.s permitted by the appropriatione within 5 ni of the projecE site isapproxinately3.0second-feetorabout2lT0acre.feetpef}eafo This includes gll acre-feet per year requesEed by Energy Fuels and approvedbytheUtehstateEngineersofficebutnotyeEbeingpumped. llosE of these wel1s produce water for irrigation, stock watering and dooestic use. llithin this 5-ni radius' only the existing 1800-ft depthwel.lattheEnergyFuelsnillsiteiswithdrawing!,aterfrornthe underlyingNavajosandstone.Allotherwellsintheprojectvicinityare shallow wells drilled in the alluviun, Ehe Dakota saodsEone, the Burro CanyoaformationoruPPerParEsoftheMorrisonformation.Thelocationso ) 2-121 of registered rells within a 5ai radiua of to",:t:'."::":::: :: ;:::'r..-r-l"u rhe de'cription or theae se1la ia iacluiled .- -! iha walle ;:r:i. ";'itJ'*t" oo Plate 2'6-3' the rnajoritv or the uells aodtherefore,upgradieotoftheprojectsite. are shorrn io Table are uorth .: !. GROUND SURFACE J swL le/t4tTel SCREEN(NOTE t) BLANK PIPE BOTTOM CAP F- 2' LOCKING CAP VENTED CAP PROTECTIVE PIPE CEMENT SURFACE SEAL 3" fi pvc scHEDuLERISER PIPE IO'BEDROCK CUTTINGS 77/s" o urug CEMENT GROUT BENTONITE SEAL SAND CEMENT BASKET cp,;v)-- u.Jr(/ru\ N' ?o(\Jt.! :l nOl c/, U)l >>l lrrrdl E-l<NOT TO SGALE FINE, DRY SANOSTONE 98' COARSE, VET SANOSTOIE lo' C LAYSTONE FIGURE 2 P I EZOMETER- INSTALLATION WELL NO. I CONSTRUCTION DETAILS PREPARED FOR eruEncv FUELs NUcLEAR, rNc. DENVER, COLORADO -;15' a NOTE I: SCREEN CONSISTS oF COMMERCTALLY SLOTTED et?E wtTH 0'045,, W|DE S3 ROWS Row /, ;^$??: 4 iigfoib?rs' , I(\l co(o)l Ia(r9G7N>D:EG562, W.WJL\. lDlrl.Vlc)l(ol6 5Egc 'lrl1(oi=oz GROUND SURFACE LOCKING CAP VENTED CAP PROTECTIVE PIPE CEMENT SURFACE SEAL ;?rt#r?cHEDULE 72' CUTTINGS 7 7d'HOLE CEMENT GROUT BENTONITE SEAL SAND CEMENT BASKET SCREEN(NOTE I) Y, ,swL tto'le/ t4 /7el BOTTOM CAP -79'82' _95. SANDSTONE _t25 -.-_;;g'cLA-Y_€TONE NOTE I: NOT TO SCALE q9BEEN coNstsrs oF coMMERctALLY SLOTTED PIPE WITH O.O45 IN. WiDE 9!OTg,3 ROWS AND 4o-4zlsloTs/ROW/FT. PIPE. FIGURE 3 PIEZOMETER INSTALLATION TYELL NO. z CONSTRUCTlON DETAILS PREPARED FOR ENERGY FUELS NUCLEAR, INC. DENVER, COLORADOzo .a lrJE f.,e.ffs!q)tlHqlrrrdlGNU D'^.\PW{)II-{)IYL\ T LOCKING CAP VENTED CAP PROTECTIVE PIPE CEMENT SURFACE SEALG9E.h,:pa.EEfaz, 9" 0 pvc RISER SCHEDULE 40 PIPE s5' 6t'tr CUTTINGS CEMENT GROUT BENTONITE SEAL SAND CEMENT BASKET U,ELL DRY (9/14/791 BLANK BOTTOM SCREEN(tlOTE l) PI PE CAP 87' g6' J :SCREEN CONSISTS OF COMMERCIALLY SLOTTED PIPE WITH O. O45 IN. WIDESLOTS.3 ROITYS AND 40-42ISLOTS/ ROIIY/FT. PIPE. NOT TO SCALE FTGURE 4 PIEZOMETER INSTALLATION. WELL NO. 3'CONSTRUCTION DETAILS PREPARED FOR ENERGY FUELS NUCLEAR, INC. DENVER, COLORADO w'wil^q.A LOCKING CAP VENTED CAP PROTECTIVE PIPE CEMENT SURFACE SEAL 30 J"o PVc R ISER SCHEDULE 40 PI PE EEDROCK CUTTI NGS t'ti'HOLE GEMENT GROUT Y swL ^-,@"t BENTONITE SEAL SAND CEMENT BASKET SCREEN(NOTE I) -ilz' SANDSTONE FIGURE 5 PI EZOMETER lNSTALLATION WELL NO. 4 CONSTRUCTION DETAILS pnepaned ron ENERGY FUELS NUCLEAR, tNC. DENVER, CoLORADO CLAYSTONE I : SCREEN CONSISTS OF NOT TO SCALE COMMERCIALLY o.o45 rN. wtDESLOTTEO PIPE WITH SLoTS, 3 ROWS AND 40- 42/SL-OTS/ ROW/ FT. PIPE.D'^\mm{bYt;{DN L\ AF *lniR u+6lt to lsflel+I(\Jl@l(ot @ =E Er =3E=6Z GROUND SURFACE LOCKING CAP VENTED CAP PROTECTIVE PIPE CEMENT SURFACE OIKE SEAL NATEilA L PVC SCHEDULE 40 PIPE ORY BEDROCK uGHr SAIVOSTONE CUT TINGS 6l/2" O HOLE CEMENT GROUT BENTONITE SEAL 93.5'-CEMENT BASKET ilotsT sAntosTotvE95.5' SLOTTED PVC PIPEo.o32 SLOTS, 3 ROWS MRK SAAIOY SHALE(s-l- 80 )Y lgt.g' rss.ol rss. s: BLANK PVC PIPE 8RO Wty CL A YS TONE FIGURE II PIEZO METER INSTALLATION WELL NO. 5 CONSTRUCTION DETAILS PREPARED FOR ENERGY FUELS NUCLEAR, INC. DENVER, COLORADo BOTTOM CAP NOT TO SCALE W'WWA, tt t23! HCRCULET{E. AA! sHtTH CO.. pox I oi)lr).o (\t I e9e = lrJ l=3l,u =)z GROUND SURFACE 70.0' g5.or- gg.7t- 130.0' 130.41 135.O! VENTED CAP 4., O PVC SCHEDULE40 PIPE CEMENT GROUT T7/g" @ HOLE BENTONITE SEAL CEMENT BASKET AND SAND DRILLED SCH.40 PvC PIPE Ig" HOLES, APPROXTMATELY 20 PER FOOT 4..O SLOTTED SCH. 40 PVc PtPE o.O3O SLOTS, 3 ROWS DIK€ MATERIAL DRYLIGHT .. SA IVOSTONE z ?90.?' BLANK BOTTOM CAP PVC PIPE DARK SANOY SHA LE FIGURE I PIEZOMETER INSTALLATION WELL NO. II CONSTRUCTION DETAILS PREPARED FOR ENERGY FUELS NUCLEAR, lNC. DENVER, COLORADO? NOT TO SCALE E}:$'PRDT.@N]TA to( I,rr)oNrl GROUNO SURFACE 20.o' 79.o' 82-5' 84.O' 90.01 VENTED.CAP ( 4" o Pvc sCHEDULE40 PIPE CEMENT GROL'T l7/g" A HOLE BENTONITE SEAL CEMENT'BASKET AND SAND DRILLED SCH. 40 PVC PIPEt/a" HoLES, APPRoxtMATELY 2A PER FOOT DRTLLED SCH. 40. PVC PIPE, 7e' FIOLES, APPROXIMATELY40 PER FOOT 6l/2" o'. HoLE BLANK PVC BOTTOM CAP PIPE t29.O . FIGURE 2 Pt EZOMETER INSTALLATION WELL NO. 12 CONSTRUCTION DETAILS PREPARED FOR ENERGY FUELS NUCLEAR, INC. DENVER, COLORADO NOT TO SCALE f,}@EA DIKE IYIATERIAL OARK SANOY SHALE q DRY LI6HTsAilosToilE MOIST SANOSTONE ot P29 ullt'llm,Ittzom I, _{zoID 6 r\ o Zo { r DnIZs\ n 1S S, 70oc Z\l (n tr 7S.T om Z c SN =l-u'Pl^ b3 !\ r$ t\(( rnZ{ $ Noc-{ {r oi C);' -sDoKt, t_d_i_ orn Z "iZr Fr u) Er $ t\ =l-,n9!il- rnsSo\\< nct rF $,s rnr R,\ NN'-0 ^)bb s FZ,\ \ o X rr)-lPg r N rn ,oq 4 .T o,:,$ lt"i" c ,)l,e',.b...'." O \;.,i".; g O oo ol,.$ i i,..,r.-,.,.0.. ol.o{t q'-rj 9 .,or'. ooo ol oo'o'r0 0oo0 |r\'.'l:r c ot,::'r! o'r.l pi' .'' o 0.D.. oD r :r B D :.. l';. cl r ;': l m ,,n omoo, !jo-o.ll,m 6 6z E oT !! C, ,ll E,, =2d 2o ra-!-,J.o2frLo /s F,{ z U DrfI ez s $ D 5 -tct\ c 4 c T rl F ( I :lml l=l-l-{lm l= o l>fl= d lFNlr_ tE Fl=lzlot;l{l> l. ;lzfileJlr, lrnr l"r rrt\l c s\Ct\{ -0o _0 G G 7o*oo =a-. ,olrotroottoxor+fa.ou o-moIg oo E ( o C,, {z 9 $ rnxl E,l 0 m oo a rrol oI o.ll , 'll;szo ! E,{ 9'zo ,,ttrtm,m2o1ll o, =-oo o n q Z 0\ \rooaZo C\ ! $,[otrZs LF Cn tsn In b_ 5Z =C NIo s(F =l-$DPiAno< !o\ rtr a\m tflZ-{ h 7SoC{ Bd$oq9 (D mZ{oZ -{ rn (r\ rn r ar- :L',q b !r, $Ul =1-o9n-{trn b"{\<xom hN $r \ G7\ $'Fqo- sr Z/\ .s o X rrl{ gr N m 7S ? s {{ m ,Itl 0noo, !{62 o.ll,m =oo2 E ox !! C, -{m E,, =ao-I -!I3Y<qJ'|aC, Dn,\ 1 v DIrI C z \! DI 1 eF 3e 7 e T I nrr r U ilrlml l=l-l{lm l=lm g l>L. l= $ lT { lFnr l>r lZr lol=lol;l{t>l- z16tn t{, lrril rn\l C 9\c\n{ j ol) 4 S.l c 7o*oo =a-.Toiotroo €orto E ) o-moIg oo F ( l C,, tZI \I fllil r0o N Et oo\, Flo -0 o- ott ,,ll1szI Umetco Minerqls Corporation P.O. BOX '1 029 GFIANO JUNCTION, COLOFIADO A15O2 !E (3C)3) 245-370A December 11, i99l Umetco l'linerals Corporation Wh'ite Mesa Mi I 1Attn: John S. HamrickSite Environmental CoordinatorP. 0. Box 669 B1 andi ng, Utah 8451 I Dear Mr. Hamrick: . Per your request, on Friday, December 6, lg9l, I made a v'isjt to thewh'ite Mesa Mill at Blanding, utah. The purpose was to ascertajn areasonabl.e. geolog'ic scenario to explain -the empirical'ly observedrelationsh'ip.between fluids impounded in the F1y'Ash pond-and fluidsmeasured by the Leak Detectjon system of Cell #[. In'tracking fluidmigration, it 'is_ always a valid consideration to assume some io'le byfractures and fault traces to provide a conduit as you have hinted at j;our d'iscussi ons. _However, thi s concept i s overwo-rked and j s commonlyjlr.o-fS{ prematurely as the mechanicil I jnk. The following letteihigh.lights my observatjons on the observed flow of flujds from th6 Fly Ashpond to the detect'ion system and to comment on the most reasonablegeologic. method of transport and the possible role of faults or fractures.This addresses only the fluid migration and not the chemical composjtjonof the fluids measured. Attached is an evaluatjon performed by itaff oi !nq geochem'istry of the 'l iquids in the Fly Ash bond, cell z,s LeakDetection system, and cell 2's Slimes Drain syst'em (iiquid above theliner). SITE EXAI'IINATION The on-site examination included a look at the pit wails and floor of!h. F1y Ash pond and the sandstone exposed there;'a fjeld revjew of the laygut of the Cell #2 and the locatjon of the leak detectjon system; afield revjew of three sandstone outcrops at some distance from the ftV ifsnpond. These three outcrops were al1'smal1, less than ten feet bi tenfeet,- and approxima.tely l/z nile to the east, l/z mile to the northwest,and !/2 mile to the south. One shale repository, l/z mile to th6southeast-(Pond #4 excavation material)'was alio eiamined to heipcorrelate l'ithologies of the units that could be involved in the flu.iimigration and was conducted jn the accompaniment of lvtr. John Hamrick. The three sandstone outcrops appear to be the same sandstone un'it andpart of the Dakota Formati on. 'The sandstone j s coarse-grai ned,sub-angular and well sorted when viewed wjth a hand lens. The sailples aljare I ight colored with a predomjnance of hemat'ite sta'ined matrjx ind show kovschak, F1y Ash pond page I a f ew sparse gra'ins of heavy mi neral s whi ch are una'ltered. Thesecomprisea very small percentage of the overall sandstone. The samplesfrom the bottom of the FIy Ash pond, however, seem to have more limoniticalteration than hematitjc which would'indicate a slight'ly more oxidizingenvironment. This observation is not conclusive based on the limitedoutcrops but is compatible with sandstone that have been underwater'i ntermi ttentl y. _ Surface exposures do not appear to display any unusual amount offracturing or the development of a strong regional joint set. Thesandstones of the Dakota Formation are noteworthy cliff-formers in thecanyons around the Blanding area and would appear to be competentsandstones. . Standing on the edge of the F1y Ash pond, jt is possible to see boththe sandstone jn the pit bottom and the column at the'Leak Detection siteat the edge of cell #2. The bearing 1in'ing up both sjtes is s47w. Theregionai _d'ip 9f the sandstone is Sl,l and, therefore, from the F1y Ash pondygu a19 -'looking down the d'ip slope to the detection site. ThL orjginaiedge of Cell #2 was withjn 100 feet of the F1y Ash pond boundary anO'isalso bisected by the S47W bearing. CELL #2 CONSTRUCTION Cell #2 was constructed with a minimum of one foot of well-sorted,graded material underneath the cell liner for protect'ion of the linerproper. Therefore, this permeab'le layer now exists from withjn 100 feetof the bottom of the F'ly Ash pond and'is continuous to the Leak Detectionsystem on the far and geologjcally downdip side of Cell #2. It seems p1 aus-i bl e from a geol ogi c standpoi nt that the fl uids 'impounded i n the F'lyAsh Pond, and at the t9R of the Dakota sandstone, wouid migrate downdip100 feet to the permeable 'layer underneath the orig'inal CelI tZ and fjndtheir way to the detect'ion system. CONCLUS IONS: A rather simple and yet very plausible explanation for the migrationof the flu'ids is presented here; namely, that the flujds in the F1y Ash lgnd are jmpounded on the top of a very coarse-grained sandstone whichdips to the Sl.l and intersects the permeable layer under the bottom of Cell#2 and is therefore "channeled" under the celI and detected'in the Ieaksystem as it should be. I recommend that backfil)ing of the Fly Ash pond be continued as previously approved by the US NRC. - Regards,ffiA. A. Kovschak, Jr. ,r/Mgr. of Geology & Mine-Engineering AAK/J ac kovschak, Fly Ash pond page 2 ITATER QUALITY Ai{ALYSTS Graphica'l techniques such as the trilinear plot (Hil1, 1940), or the St'iff diagram (Stiff, 1951) are very useful in "fingerprinting" m'igrating seepage and differentiating such seepage from different sources or from amb'ient groundwater. The trjfinear plot (Hill, 1940) is a graphical technique in whjch the percentage composition of the major anions and cations in a water sample are plotted onto triangular plotting fields. The resultant plotting positions are then projected into a central plotting diamond, defining the sampie's compositjon. The plot is so designed that mixtures of water are shown by progression along a straight line connecting the plotted points of both watersjn the central plotting diamond. Thus, the trilinear plot is extremely useful in determining the percentage mjxtures, based on the major ion compositional profile of the two-end point solutions. The Stjff diagram is a "s'ignature" formed by plotting the relat'ive percentage of major cations to the left of a central axjs and the an'ions to the right of the central axjs and connecting the p'lotted points. In the computer mapping program utilized, the cations are plotted in the order of sodjum plus potassium, calcium, and magnesium to the left of the central ax'is. The anjons are plotted jn the order of chloride, carbonate plus bicarbonate, and sulfate to the right of the central axjs. Such a graphical signature 'is useful 'in making visual companisons of varjous water chemistries. Table 2 shows the data used to generate the figures. The column labeled "Previous Sample" under the "F1y Ash Pond" heading was not preserved, so that organic content could be determjned. It is included only as a check on the variabiljty of the measured water qua'lity in the fly ash pond. "Cell 2 LDS Blind Dup'licate" and "Blank" are included for quality control purposes. The attached Fjgures I and 2 show the Cell 2 leak detection system, upper drain. Figure 2 presents the same data Figure 3 presents the data in the form the Stiff diagrams for fluids taken from and lower fly ash ponds and the sljmes as Fjgure l, but on a larger scale. of a trilinear plot. -2- As shown by the p1ots, both the Cell 2 LDS fluids and the contain alkalinity (carbonates and bicarbonates) while the contains no alkalinity. 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L.FLY ASH P. SLIMES DRAIN Anions 100 125 cl HCO3 + CO3 so4 ct HCO3 + CO3 so4 NO0 cr HCO3 + CO3 so4 NO8 cr HCOS + CO3 so4 N03 Na+K G Mg Mn Na+K a Mg Na+K a Mg FIGURE 2 WHITE MESA LEAK DETECTION ANALYSIS m eq/l AnionsCations 25 2A Na+K G Mg Mn Na+K G Mg Na+K a Mg 25 cl HCO3 + CO3 so4 CI HCO3 + CO3 so4 NOB cl HCOS + CO3 so4 NG so4 - rb U.FLY ASH P. L.FLY ASH P. SLIMES DRAIN FIGURE 3 WHITE MESA LEAK DETECTION ANALYSIS 60/ ct CELL2LDS U.FLY ASH P. L.FLY ASH P. SLIMES DFIAIN 60 40+Ca Cations oh meqll 40 60cr+ Anions