'Wi 11 20086 8~0122 PDA ADOC K 0 4008663

PPR

· .. ' ·

SUNDANCE PROJECT

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l. • •

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Prepared for I L I !}

'' . r. ·No· Resources ' tine . . , i tf . J . h ., ~ ·~..: ln tt. ' i' l "}

, •• ·:· .:' ·7·. p '200 s. Lowe,ll. St . ... ., ,,! .. ,' .. (j ft'..j- · .. f-1

· · ' · Casper. WY 82601 r" ~ . .... ,... • ' • • ' ;•. • ' '") t • ' ·

J t , ~ . .,.': ,, .I '- I ~-' ..

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: ~ .. Western ,Wa.ter"consu1tants, Inc. ·

P.O. ,Sox 3042 . J •• ' t • •' • · ~ I

Sheridan, WY 82801

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January 22, 1982

NRC019 Submitted: 8/25/2014

-1-

TABLE OF CONTENTS

u LE.

Introduction •••• . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

. Background •••••••••••••••••••••••• . . . . . . . . . . . . . . . . . . . . . 1

Restoration Cri"teria •••••••••••••• •......•....•......... 3

R ·1 · . A . .. .if·~ " ~ ·- - . e·S·t.ora·t on - ss·ays•····•··· '•••••·•·• .... • • • • • ~ ~ · .. · ft .... • ~ ........ .. 5

· Con c 1 u -.&·i· o n • .• : ; ; • • • • • • • • ~ • • • • • • • .'. '• • • • • • . • • • • • • • • • • • • • • • • • . '· -~ !~

, . i

. j ~: t " ; ~ .

' .. • t I - ' •: ' .. p > ~ ! I ' . ,J '·' ,. ·~ ..• •• t: f1 I

~

' ' : ' ~ .. :"'j '>#' J ·' ... . . .,. ' ' Established Heatoration Criteria for B

Aqui!•r ·fn Comparison =· to Wyomin9 · Ground · i:c:: •. Water Standards ••••••••••••••••••••••••••••

I ;; 9 ~tl :, : I I"' . ' ... '

: : - ·. . Table, 2. Restoration Summ~ry Well

f n : ~ ,. ~ ·~ ~: ., ~ ~ . : . ~ . ~.:· 4 .~ • •• ,

No. 3X (B-1) • • • • • • ·.' ' ,. : ~

" -Table 3. Ra•tor~tion Summary Well ~ ;;, .J t ,l · ... ·l t~ ,. < ; : ,_. .. • .:. • J ~ ~.- ~(;.. ~

No . • 4X (B-3) • • • • • • r·• - ~ ·: ·: 'ti • ' I,

Table 4. ' ... ,; r \~ ·: It ~ \ ~

Restoration Summary Well c j • • •• ; :.. ~ • "'' ;'" ;

1'40. 20X (I-2) • • • • • t· . •· '

.. ~ ' Table s.

~I (I ~· { H f (: .... ~ I

~atoration S~~m~;Y Well 1

• :· ... (: J '· \' .. ~ ·; l : . I t ~ ·.1 l "' I j ... ., ) •. i

No. l9X •• • • • • • • • • • - ) '' . '•[j ·• il :.\ "I ! .. . 1 f - r. :·. j ,., (", 1 '·' i ·" t . :

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6

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9 .

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I n C. 'J .. ;1 Ct r ,; t ( l i \ r t 0 ~ r 1 (; ~ l: . • .., 1

INTKUDUCT!ON

I) n ~ -c 1, !. ·~ ·: •; 1 r ! '• , ; ·: i :r , :. (J t t '• o :1 ~ (. '· ~. • i 'I ~ s. '1 \ ·• \i :"J w n

r c N li.Clllrea r 1 0 ~ n a~~ c s ~ 1 a ~ :. o p· e r a t: o rr t; o li' d'i u b1 e t h J ci i n t; c V. e n t ) 1:1 n eJ ,1 ~, c e

h a Sf' rr"i;eJQ:u.e: s ted !. p etr ITI),bsis/t. o n :if lfi 01m', ntr.jl e. t:WJ om i 019 . Depart men t o f /_£_ _, c...,. t'' I f

Environmental Quality, Lond Uuality Division to plug and

fi~ld of their In Situ Solution

. : A~ , .the . r e q u e s t o f M r • P,. 1 S to i c k 6 f N 0 R e s our c e s , I n c • . . i . , k <' •.

(for~ecly ~uclear Uy~amic~), _ Mr: Doyl fritz of Wes~~rn Wafer _~

Con,iS . u.lt 1~.n .t .. ~. J .~c ~ , _ S .n_er t~~ -~· : wr~m .~ _n:g ~~s exa~,in ~, ~ - t.~ ... ~--~-~ restora~ j on wat,er. qu~li .ty ~~~ ( ~- ~~~, t~r·~- sit: t~ ._-prov _i ~det:~n1 ~,i: independen~ ,o_pJpjon ,. as ~-~q. wh~ :~~~~ the ;re_ s ~:or.~Jipp ~ ac,t .\vi _ti~s ; :~:: have ~m~~ the re9utrements oj the Wyoming , Environmental Quality

• , • • -~ ~ 1- ...

Act · a.Q~ accompanying rules and regulations. This report

.presents .. ~ h ~ . f ~ -n d _1 n 9 s o J . Western Water Cons u 1 tan t s , I n c . ~ ' ' . :. . .. ,, ... ' . ' ' ' -· . . t, r. '·' k .:

The _ rca e.P; O,r~ h .a~ , b~~ri .rr.evie,w.ed, b_Y . .,a. ~econd in_dep.endent 1 .,

c o n··t .r -e.& t Q r ' · M AI 9. e r 1 ~ ~ : ~ ~ t! b u r. t • . C p n s u 1 ~ .~ n .~ H ~ ~ r o g e ~ _1 o g .i ~ t . ~ . . .

of . .Ch1e,y,enn.e, Wyoming • .. Ms , • .

1H,u.J burt'. s comments have been ·· -· · . ·- ' e ·- , . . .

incorporat-. _d i,fl ,t,.o. t~h ,~.~~~t~~,.;_ t .. Pt .. ;r.ts relor~. j· •. . ~' ; ~·

I . . , 1 ... ·; !~ ( ,, I I, • ', . .. J •

bJACKG~OUNO :. ... .. ,i • lo f f. ; 0 ,

~ ~ on Sept~mber ~~. J~7~, NO Resources, Inc. shut oown • v

restoration operations on Test Site No. l at their Sundance

Project in s1tu ~olut1on m1n1ng test s1te.

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f(J U i tl t~l l s e-i. i.~~ r~ i e c; ue •• o: L~D :, ';;::::. 't.:.~: Jr~

~'pil l i..e r·n , ., I•

I ~ • w- · Ch b a s. e ' i i !?

(' ) t l (I I j ~ It t d •

: r \ tO.n- \S~Ja,p t e m b e r 2 6 , 1 ~ 8 U , N 0 R e s o u r c e s , I n c • s u b m i t t e d

to the. 'Wyoming Department of Environmental Quality tDEQt_ E_

Land Quality Division (LQD) a report entitled 11 1~80 Activity

'' m

~as t ~ ; r~~Ges· t t·for · ··permi · s. s · i -o- n to. pJ ug . and sea l off .. . \.. ..- . ' wells in the Phase I well field and then rec laim the well

s 'i t e s : · '' :· t: - " • •

' On . March ~1; lYBl LQD re .sp onded to that requ est by · {i lt. _... .. ,- · ,. '·' ,, ,.. t• ~ "' ... or r..,. -: ,, t· t fl.r I... · • .~ 1 •

. ' ·s t a t i n g t h a t c e r t a i n p a r a m e t e r s r e m a i n e d a b · o v e t h e ' .;... St ... • .'7; ft ·1 .: i ·, ' .

"pre-mining use cateiory 11 in certain wel l s. Permission . . < . ) ~· • t

' tb pl~g and seal off the Phase I wells was not give~ by LQD.

' I, I ~ 's i' rice • t h a t • t i me ''a a d i t ; 0 ~ a 1 s amp ., i n 9 h a s b e e ri d 0 n e by ; ,.. ' i ... t f~ ._ 'i,. f • .; ~ .: ' I

HO Resources. Several wells have oee n included in this t (' .• !:- {. ('! : • : ~;. .. . • • • \

sampling program, with emphasis placed on wells l 9X ( adjace nt ~ .

to tne . recovery .. we11), i~jection wel l 2ox ( a l so called I-2J,

r.,.~rid.;~~'ttir well 's JX;' ('B-l 'f :an.d 4X (d-3) . Emphasi~ 'wa·s placed

~ o41n~ t~.e~e · iou'r ' w1e1ls·Cl ~i the1 ;e:qG'~~t~ 11 of LQD sincJ' these are

~ th~· fou~ 5 pat t ern wells" for which basel in ~ had been

estaolished. \ '· • f ... • j

T h 1 s r e p o r t p r e· s e n t s t h e r e s u 1 t s o f t h i s a d d i t i o n a 1 . '

sampltng ana compares the resu lt s with estao li shed ie stb r ation

criteria. :I L£. ~I

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. ~ 1 p n e. l • ~ l v ~ C I a s s i I · · s t a : i " r (~ s. ( lJ H , ::. .: , S 0 II ~ R a 2 ~ f: , 3 i; ~ · .. ,~ :., ·,

• .. ,

,.. .. o ( • .~ - h~J a1o' ~ I J ) ~~ t ,, (. ~ : j } . stcnd-.· d :. (pHi Cc.'

dit d ~ •· ) ) ~ a i fd 1 a J . R E S T 0 R A T I 0 N C K I T E R I A

·: "1 C g r (.) u I' r: 1.· <~ l C~ :- i r ' '1 ~ 3 Z ~ II(! o q .: ' f E: :· "' 0 ·.t • :;· p t" 0 i' i:. ~) 1 y

( ciJr.1e ~ f b.ll e(: is·,alrr)di )) n we 11 e r.: ~ silti~Jb r i: ~he o -:. d~t~tr:.i ,n g~ '·, r: ~ c en s ~; :n·g: .as l h.es s ' , . ' I (•

I '- 'f.·· J

hi 9 he s t aver age con centra t ion for any g i v en par a m e.t ~ r ·a..±:: .• - -,..._,... . .. '\ . ... .. . ,. .. '

were ba·s ·e.d on 'h v .

which was estab li shed a.s .t he hi .ghes t a v ~ r ag e pH .·,a,t .any we ll

p 1 u s 0. 2 stan a a r d pH u i1 it s·;-a-n d '"ur an i u m ; w h ; c h w a s e s t a b 1 i s-he d • I • t (

4S tne hi g·be·s.t.· average 'dnicentrat i o·n 'o f uran i urn ' at any we 11 ;"~J.L:.L ~ { . . ~· . ;, '

'I • :I,

'.

• • ' ~ ~ ., .... J

us O.l mli1 llig~a~ p.er liter ( mg /1). _ h II ; j ~ \

The r1e.storation c.riteria established for wells i n the ;~:. . . ,. .. '• ; ' ~ . ,,. • "' .. ;--• . !' :

S aquifer ·are presented " rr Table l ~~·· · Tab l e 1 al ·s'o .sh ows, ·5' I • • . ~ PI for _purposes of compar1s~n,, Wyomi ng' s ' water qua lity s t andar ds ·· ( •. ..~ ~.v , ... ,

f o r C 1 a s s J ( d om e s t i c ) , C La s s I I ( i r r i g. a t i o n ) a n d · C l a s s I I I ~ · ~ ~ 'Jj. .;

( I i ,; I

{ 1 i vestoc ~ J ground wat er S.~ -. . ' .

I t i s i m.p or t ant to note th at ·

assuming a\ 1 restoration :c :.r. t t eria were -~met t he water wo ul d r ~~·~.j.·;, I I " . •

s t 1 1 1 n o t me e t e s t a b 1 i s.il e d s t a n d a r d s as a C 1 a s s I , I I , or ,, {J~ ~

" res t or a t ~ ~:n c r i t e r i a e x c e e d e i g h t C l a s s I A·'l~. 1 w a t e r • · T h e ~r1·, fll ·~ .:IH rr ' 1 1 '1 ~ 11(.' IJ f ·-'~' • ~ ;- ; :1 . ~ c standards ~ ( ~H, TDS, Cd, f.b, S04, NH3-N, Ra226, and gross ...

• • • •,•;• I ' ' · ... ' ·' . "

alpha), f i ve Class II standards (p H, Cd , S0 4, Ra226, an d ·. -

gross alpha.)· , and four .Class I I I standards ( pH, Cd, Ra22b ,

and gross a l pha ) . . 4 •

T h e 9 r o u n d w a t e r i n t h e 8 z o t1 e a q u i f e r w o u 1 d· p r o o a b 1 y

be classed as a Class IV (A) ground water according to Water

~ual1ty Di vision Rul es and Reg ul at ions , Ch apte r VIII . Cl ass L.E- ~11

3 '~ - .·-·-.·· . .. -:

~: •. ~ ·-.. ; · . .1.:. : .. ' '• • --~~- ·

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G;; ~~ r~o (p:1/1) 2]000 Grc~..s f! (~ : l,i) e67 .:

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Table 1. Established Restoration Criteria forB Aquifer in Comparison to Wyoming Ground Water Standards

(All units in mg/1 unless otherwise noted.)

Res to rat i ori Value

733 .0

Class I Standard

Class II Standard

, 0 •. , .. TD.S . ...... ~ 1 ~- • 'O "o 1940. 0 500.0 ' ~ 0 As 0, , I - 00 o. ·· o.ot5 lo j ... " • .. 0.05 °:

~-

Se 0.008 0.01 ' . H03!H0z·N 0.088 I o o

8a 0.01 1.0 o, ,. 0 0.638 0.75 0. 75

Cd 0.061 0.01 0.01 Cr 0.026 0.05 0.1 Cu 0.01 1.0 0.2 Fe 0.146 0.3 5.0 Pb 0 .o. 053 ,, 0 . . ·: 0.05 ! 5.0 I.'"'

Hn 0. 017 0.05 0.2 Hg 0.00005 0.002 Hi 0.024 0.2 . ZA 0.024 5.0 2.0

'i Mo 0.005 ~ : .·,-.. c.a 8.91

-~ 3.41 ··- .. .0 (

J q ' .. :·. 14.3 250.0 100.0

" . 8.69 ·, , .. r \ -·- . S04

- .0 891.0 ' 250.0

0! . 200.0 t \. l.,

co 33.0 ---•;

Hca3 660.0 ........ :

HH3-N 1.089 0.5 0.01 .. 0.1 v ,,

• I,._ ( 4 .. • ,.. 0

Ag o.oos o.os lo u o. 2190 I 5.0 . 5.0

~

Ra226 (pCi/1) 93.5 00

5.0 5.0 °

' ~

- - •rou o (pC1/l) 230.0 ~ .p • ;, • 0'" .f.? ~-0~ 15.0

0 oo .. Grou a (pCi/1) 267 .o 'I ~0 .. · < r . . •. 1

., ·:

' • 0 - '

Colass III Standard

5.0 0.05 0.05 0.5

0.1

0.00005

25.0

I. ---2000.0

3000.0

...... Q.l

5.0 5.0

15.0 ' 0 ' ---

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··'!i· . .._ · · · . :P.r: ~ ~ - t e s t c r il <.. i c n a s s a y v o · t: r; "S t c t , c ~ s t a t; i s Ji E d r e ~ : :.: '" c t ·0 o i

c :· • :. e~r i ·n \ i t. c- m 2 a b o·v e c~ r· cl t. o ~! .'1 o ~. : n 9 c ·, e. s (; l l ~. ' 1 t e r ·· a

,... " a:;. s

I V)l A') : t r i t e r. i a~ ~.s i m:pel y ;1 r ·e ·qw..i ~r e. ~ t, h a it .a:·· wca~·lt e~ r.u: h a· v, e c ·a cT ,o.;S · cJ

c o:n. c e, o t rr a \t o ~,o n::. •·n q t_ ~ i n : e t}( c e:.s s: .. 1q1 f .ll> r, 0 0 0 : (11 g L 1 , \',0 9 C1 g r a _; ~ ¥ ( Au :; ~

c 1 ,a s s i.f:h a a~ t to·.nc, .a :1 s 6 ~ r e:q·u' i .ne·s ' t b a t ~ r'iJQ. m~a t,_e:rl~ a.,.) o tb e::! d:;i1·s;Q1h a. r g e 9 s ~

its intended use.

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Taoles 2 through 5 pr,esent re.sto'ration assay summaries ' . . -~ .. - ·--· _,..._ ..... ... .. - ....... .!. ... ,..-

for wells ~X, 4X, 19X and 2.0X, th~ f,our Pattern I wells for . :. 'I I .

j t \,..! i ... d ~ t ~·..: • ~~~ I :;; ' I . I • • I I ~ ,. • • '

w h i c h ,ext ens i v ~ o b a .s e 1 i n T , a .n? ( ~ ? tor~~ i o ~ d ~ t a are, ,a v a i 1 ~ -~ 1 e . • _ ..

4 __ ....,..._~-----~oo•----~---~ _......w .. l.--o•\~ .... oO _.....___ 0•-'~-....o.:- ~ ·-··~•-... •II• -1 ... .,1- .)..

Tne tables presen 't for _purposes of comparison (1) - the ~ -r t ·' , ! =~ : • I .':~1 ··' •• , ·• • .. • • • ,

1 · ..... ~ ,_ • - · • .• ' ';:

individual well ·· o.ase1ine .valu.es, (2) r .estor~tion crit'·eria t·- ' ..... ~-·· --.. -:--,~~- .. - -:--:;. -~.. ~ • - -~·--' . • 0 .... - •• --;- .... ! :..

e s tao 1 i , s he d for t h i s. p r 9 j e c t d u r i n g the p roc e s s i n g of L i c ens e • ~ :. 1

• • '.,..., '"'':f' ·. - • - .... - I ~ . . • ' ~· . ·t .,_

to ~. Expl!ore No • .L~, (..i) ~lass _I.I ~a .~er. Rual ,ity ~ri. t, e,ria,:.·.: and ':: ~. . . ... ~!.:...~ .:: .. !._:. . . . '-":'-~ ..... ~ .. ..-.... L .... ~ ... _;_ ~ f ~~ 1 o ~ o 1 • ~ I• • > ! 1 ' I \

l4J the post-restoration assay values as determined· by COM .. 0 • I

~ ,. · '" I t • • • •. • • • ... ~ ":' - ~ . '

Labor~tDries of Wh~at Ridge~ Color~do and by Chemi~a1 . and , ........... ··• ....... - ... r .,

. j

The last two ' I . ..

Geological Laboratories of Casper, Wyoming. i !. •

~ ; • ' .. I •

columns in Table 2 through 5 present comparisons of the -: ..... ·- ' ~~-·~··,_ ........... ~ .. ~-~"~-- -'7"""~-.. :----~·---~-.......... - .. ·. :~.. . --:~ ... ·: : . : ·:· "i .... -: ; ! ..

post-restoration assay values to the_ established restora~ion

criteria (item 2 abov~J and to Wy~ming Clas~ II criteria

(item J above). Class li criteria were used for comparison

s i n c e .-t h a t is the _ hi_ gh _~st use tQ .. _w.!lj.ch the ... ~ta. :t. .e .. r .. ,cpuld • o' . '

conceivably be put, even though tne natural water does not

meet all Class II criteria. TDS alone would prohibit use

of water from the d aquifer for domestic uses.

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8.)lf'lint

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·I Rcstontio11 t lan 11 C'~ l t!l . ..E; & G l t b Rts torH ~~~~ t lu~- 11- . . £ -· ... -• ·~r-:---··-·

· L I , Crltrrl• C•ltcrfl l-11-6! l·ll -81 ~-1? - 81 1- ?l-81 10-14 -et lb-14-81 Crlterlaj7 Crlterl1? f ~-. V· :--~.:!,, Q,. \tor.,,,,..

~l~ .y.} 11.13 __ WL _J....j....:.._i.!l _ IU 8.1 8 . 1 8.Z B.} • Y£S .ns ! . . . . . (on:! . { :.nho/cm) (~II _1~9~ .•. .. ()I I) ( ~ .: j . 2L00 . l Yl~ _l,.. !• :_:_·•:. -.J,..:'.~::..:._ ~" . .!.!::..:~-~J _ 6]!_ _ _ ___ll! _____ . . _. __ ~~~1_ _ __ s:o _ _ ___2L_ ~8'.> .• 1568 vrs 1 , ·• '-·>: ....... ! .. . ::. :; __ 1 _, ___ 2.1' 1os Jfl.LL_ 19~\1 -.1.~~L. -~~~o __ ...J.~'.L__ ___!!.:'Q_ _ tsoo , i v1., ··.::.:.us_- .; · ~:1 . ~=~--- l--;~:·: _ As __ .Q;Ql!_ _ 0.01~ _: 0 . 1 0.01) -G .0j ~ J .%S -O. OOS · 0.0fJS. I -0.01 1 Y(S l_ : '·, Yl5 ~L. •·.:.=_ ---- J __ ) 1_1· _

St' o .oo3 o.oJ~ : ~o?_: -O.O<·~ .. -o .• ~-;~ -o . rn_ ~o.oo~ -o . r.N~ 1 -o.o1 ~-~~ vts .. ...-:f.'·~:.'·-· J..:a~ _ 1101/HOZ_-H 0 .06 o.oas .. . ---o:16 0.0~ -o .os 0.42 • ~ i·/' T;o_2_L' -- - -·- r I .r €'':.:! u .• 'l'

---- - I ... - - ... s) - o.o1 o.o1 ; ... -.-- - -o .< -o.2 -o .o1 -o.2 _, '--ns · .. --- ...... • -~..£~~ n -~: -ii o . ~s 0 . 638 ~ ~- t• . 7s-' -:---;.-_ - ·--o-.6~ o. s .. o.t. ; ns _·,~_~: n~ · __..J 2..~- _ _!!:-0"

(d • - -0-.liO:d 0.016: 0 :11 . . ~r:- --:o:·or- . ·O . OOS . .. YlS ~ :..... n.~ - r .. . :Y·n ..... _____ :I~i-(r -r1.o1 --o-.o-~6'- ~'6:-J"=-' -~ :--,.-·- - -:o:ol"' - -.o-.oz . 0 .011 J ns ' · 1[~ • · .\ . .'~ :! ~ --·--·· • · tcu -:o:ol --o~~~ ;;-a~~-= ~--, - -_ . -o .or;-- ~ ~--6~- _ ----o::.OO~ ·:J Yl!> , : r t s · : 1 .. -~ '·::·.: _ .' ,.. Tt 0 .079 0.1~~.:, S. O • 4.4 _ _ o_.~ ·0.0~ 0 , 14 -:::! 0.03 Y£S l' HS ·-~~~ _.· "·· - • ---~- : Pb o .oH _ _ o.o!>~ ~-·J _ _ _ . _ _ . _. _ ~.o::,;_ -~~~- . -o.:.oos d rrs :" ns v _l .... :~~::.:-~--!,.· ""' 0 .012 0 . 01; I) 2 -0 .0 ) -O.OS 0!014 ., HS I I,. YlS \. '' I '! q I • : I'

- ii9 o.-:m:1.- - - o.o)t .. : · . -- --o:T.:;:.: -0.0001 • . o .:r.(•1: d ·f-"-; :. --· · ~. -~_Fi-_

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A c: 'F r· o m T a b l e 2 i t m a y b e s e e n t h a t w e l l 3 X ( o r B - l ) i s

fully re·st.oe eel t :o o.e:.st.a.bUsned 'C:r iteria for~· all :·~iaCQfll e;t :er?:;;':) w i t h the ;: e x.c e p t i g n s ~o f...;;n tt rate In i.. trite n_ lt f Q·9 en • ,~o bY b d.-en u m,; ~ ' o

v a n a d i u m • an d :. u c a n t u rn ; :, _ fi ow e v e r ;: ;. t · h e · r: e s t Q r e d -. w a t ~ r- me~ t s ~: =- . . . . --" - ---- ... -..... ----- . -·

I ,.- ~.;It-

a 11 ::\lyql\1 i 1!9 e~ 1 a.s.s , \.!: ·: s t~q d a,r as • .>~M c ~ 111e r.e met o y " t i]:e· ,p:a,); u r a 1 ·. , . ~ •-· ,_ . .. ... -:-\ ~ - .r --· . ,- -.--"T'-·- ..... ... LJ; .' • : · · · ·r 7 • -- ·~.

• •• •• ... . H!..J • , 0 ~.-- r , .

exceptions of manganese, molybdenum, vanadium and uranium. I 1;1'

--··· '··-- ..... ~~ · ~·

Again, the restored water meets all _Wyoming Class II criteria

which were met by t~e natural water. \ -

Wells 3X and 4X were used as Duffer wells, meaning that . ~ •.

<f't h e y r e c e i v e d 0 n 1 y f 0 r m a t i e n w a t e r a n d n 0 t s 0 1 u t i 0 n m i n i n 9 .. ' . .. . I

chemica ls . Thu s, it is probable that the restoration values • . /

w h i c h a r e e x c e e d e d a r e t h e r e s u 1 t .o f a n a l y t i c a 1 e r r o r s o r · ~· I

J • n a t .u.r a l w ate r q u a 1 i t y f 1 u c t u at i c • \ h '

From Table~ it may be seen that well 20X (or i njection ·

well 1-') has o~en fully re~tored to established restorati on Again, the

cri~~ria . with the single exception of vanadium . • • 11, • ;} • :. ' I ' t­

including restpred water meet s all Class II criteria,

if.. . ' . " vanadium, with the exceptions of sulfate, rad i um 226 and

gross alpha, which were above Cla?S II criteria in the natural

water. Table 5 shows t~at we ll lYX (within the production zone )

has been fully restored to estab lished resto rat ion c~iteria .

with the exceptions of nitrate/nitrite nitro gen, boron,

manganese, molybdenum, vanadium, uranium and gross alpha. L £_.,:/=!~ · .,111" "'J·~C. ~ ::-:-;.-;~'*.:·.:..;;.; . -. J. \ .. . .,._ ; ...........

-12-

' ll

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. .. ·. :~ ' J l (: ;· : 2 f. . .... - ' ..... ':,;. l,. '-.,'

H-o-we W€orf. f· n ii' t .. m e e t s a 1 1 :. C 1 a s s :- I I c r i t e r 1-a · ( :; a n d ~ e v.e:n ~Gel~ s ·s y

\- : ' ~ :: · a; s J 1 \, a ~ £: .~ q L· a ·. :;· : i 1 : !: .- : ·~ . I• £: ... 2 ~. t:: ; .. c"' t 1 o ·· '/ a l , e s

.... . . ~

H ..... "' j ' c. v; .. C0N,CllJS1QtitS I. :·:: ;·~e:: ~~y t·1e ·: ;: Lu:-a ·

LE

. P.a t tern ... w.eJ .. 1 s .. e.x b. U;d .t _ n;d:rl.o.r. __ v.,"a.~)-a.liop.s-:-1-.c.o+, ... e~~iP,j.~~~1r:m~~~~ rist6~aiion cr iteria. However, the restoration meets criteria

which would be established under modern regu l ations. The •l'

• ., ! , , I o ' ~ ~ \j '! 1~81 LQO rules and regulations (Chapter XXI, Section 3.d)

requir:e that 11 • • : • • .): t.hr·o~'gh the emplqyment of the best

p r a c t i c a b l e ~ t e c. h n o ,. o,.g y ( W S 3 5 - l 1 ~ 1 0 3 ( f )•.· ( i ) . . . : 11 the 11

I · ~ ·• "\o. ~ ,.. • ~ p f ~ , . 'I

condition and quality of all affected ground water will be A I , • .._, 0 l o I'"! " ( f .. - I J t I, ;_

returned to background or better, or if not possible, then

" ... to a quality of use, equa l to and cons i stent with uses '·: t '•• .I • '

for which the water was suitable prior to commencement of ~

the operation ... " ' ' ~· . ~ - •• •' \\ .. :""1"' I '1, I t\ .. ~ ., .. ~~.. ~·l ., . .

··- · Data presented in this report demonstrate tha t the .. ,_ ~ "-- -t l'J i' i .~ t . ~ E. ... restoration procedures employed by ND Resources have, within

t • • ., •• \.• • i... -' '· · ... ~~ .,. !!., rt· r.·. ,., ~· , ~ \ r1 · ~ \ . .; L 1: \i ·:, ~,. d ;.. • · ..._ " . ( ,·

practical limits, met established restoration criteria.

Further, it is clearly demonstrated that the restored water , I '

does in fact exhibit a quali t y of us e equal to and consistent

with uses for which the water was suitable prior to . .

commencement of the operation. This was demonstrated by

comparing assays of water from the restored w~ ll pattern

with Cl ass II water qu a lity criteria. The restoration values

meet all Class li criteria whi ch were met by the natural ... .

L£ P:t7 ' ''

11 . ' . --. .. .. : : . . ~ ..

-13-

l 1, ...... :. . : . .: ..... , .......

' : ·: <. r' :' ·i ... 1':1 e d .

(·.... _,../- ( . o(

--._; ;.-•/ f o r·, i l ·-1 .u s t r a t i v e p u r p o s e s • A no t h e r me t h o d o f e v a l u at i n g r e :> t o r a t i q ~:, j~ u;c S·~ ~ s:, ,'t:a~~ .

. ? than comparing the restored water to an entire use category,

t--o----c--o· m ·P -a-r .. ~e-.. -· r: .e ... s.,t...g_.r.. .... e.,.,~.t...,..Ji..a~~--C.....S u a l i t y w i t h • •. .. . ·, •.. . -~-;-;-;'~-m:-:"'!<::'~;.t . 'i<••~·· ·~.)~ff.'lft~·;{-1-

parameter-by-parameter uLe ca~egories . That is, the .·· · · '

restoration is considered a success if eash individual

parameter in the restoration assay is within the baseline

. ·"" c·"" ... . ,. use category (o·r ·· that particular parameter. Thus, if arsenic

meets C 1 ass 1 standards i n the base 1 i n e. sam p 1 e , i t " w o u 1 d

~ ... , • ' • ,. +· • • have to meet Class I standards in the restoration assay even ·

though the water itselt is ·not a Class 1 water. Th is method

of examining restoration success can be readily applied using

data presented in this report by comparing information

contained in Tab le s 1 through S. Each individual parameter

in the final restoration assays meets the same use category

suitability that is met by that parameter in the baseline

sample. Therefore, the conclusion that the water is restored

is confirmed. Water qua l ity tre nd s during the stabilization period

may be determined by examining the various restoration assays

presented in Tables 2 tnrough 5. These trends indicate that 1 : ,.,. .... : :r-J.~

the restoration assays demonstrate stability over the l0ng

term.

12

-14-

.·

Therefore, it is concluded that restoration ·has been

achieved and has e v idenced stability over a substantial period . !_ !~ rf-;'1

of time. This restoration meets th~ -~~ ~-~(.r/~. ent..s"" P.L- !.~_e • • • . J'-1.-l..l J , •Jn ~ ''<' C1:Jiiot" ,.,..._

Wyoming Environmental Quality Act and the 1981 LQD Rules

and Regulations. '.., l .)

It is therefore our opinion that NO Resources, Inc. ' ......... ~~ . .,.._,,, ·· •·~ ,. •.. ~"'~'.-.. ..... _ .. ,,-... ,1. ,. . . . ,, ... _, .c, ,' ,t ~ '""'"""':'"::.........-~"·~-····••;r·-·~r·"ft"' ::-•· •,"0""''"''M .-.,-·--

is justif~ed in requ~~ting ~erm ~ ssion from OEQ/LQD to plug ·

and seal qff a l l P~ase I we _l l ~s:

e.

.•.

.. . . •

. . .

... ,, ••• ' r;":

·.

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: ~ • o :, r ·: :;: ~

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· ... I •!. I

l ' I~ ,,

...

-15-