ML20042B074

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Forwards Data Obtained at 820224-25 Meeting in Champaign,Il. Data Includes Survey Locations,Elevations & Boring Logs for Completed Wells.Il State Geological Survey Contract Rept 1981-6 & Sheffield Site Well Records
ML20042B074
Person / Time
Site: 02700039
Issue date: 03/10/1982
From: Shaffner J
NRC OFFICE OF NUCLEAR MATERIAL SAFETY & SAFEGUARDS (NMSS)
To: Schumacher M
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
References
NUDOCS 8203240534
Download: ML20042B074 (73)
v • d • e


Text

{{#Wiki_filter:- 1 DOCKET N0.27-39 Nh g A MAR 101382 Distribution: / NMSS r/f REBrowning WM r/f JBMartin DOCKET: 27-39 WMLL r/f PDR W LPDR JAShaffner RLessy, ELD DSiefken BMenczer, IE, Reg.III EFHawkins Docket File 27-39 HEMORANDUM FOR: Martin C. Schumacher RDSmith Inspection and Enforcement, Region III (Q, l. 5 FROM: James A. Shaffner, Project Manager ' ' 4KJ *~ c Low-Level Waste Licensing Dranch Y Division of Waste Management, fetSS gl C RJ Q'

SUBJECT:

DATA OBTAINED BY D. SIEFKEN AT FELRUARY 24-25, 1982 d rv: \\c \\ MEETING IN CHAMPAIGN, ILLIN0IS [;u$h91982h[~ c:.iua w 'W"my n Q d it C As per your request, please find data obtained by David Stefken, WitLL 0 recent meeting with USGS and ISGS personnel in Champaign, Illinois. j d g g This material includes: 1. Survey locations, elevations, and boring logs for wells completed to date to the east of the Sheffield site under 86967. 2. ISGS contract report 1981-6 for area east of Sheffield Site (paid for under B6967). 3. Tables giving records of all Sheffield site wells (prior to off-site drillingunderB6967). 4. Wells logs for wells in table (Item 3) which were drilled after publication of USGS Open File Report 79-1545, Preliminary Report on the Hydrogeology of a Low-Level Radioactive Waste Disposal Site near Sheffield, Illinois. If you have any questions please contact David Siefken (427-4571) or myself (427-4572). Original Signed Fy~ James A. Sh:iiner, Project Panager Low-Leve'. Haste Licensing Branch Divisirn of Waste Management, NMSS

Enclosure:

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?ls'e'rthedmistue content color Acid Test Utl1olm kemarks jf,*d

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Itllol8I n f* tio TeCf Run 10 Y'? ~ T;ll w; tis vools a rA Re,d,wr Clay, avgillacroas, [n ~ p(qjy,qt Ihe for-o<ga,uc sw((erof r,~It (i'l Sbl 'X,"- A q " II/10fel (no{gt 1o 4t,e nj,'{ l ' h

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Core Descripts' ens 2 b+r*icJ Well * %rk,rnterval lls0ibeJ Ho,*stue c., tent colol AcidTest utt,olm % erks ~e Cla y, n,ossive, pliable Conte 11aenore cc No Tes( Ra,, 10YR !!0 stains ~ M"" ll'g'f' "' iron Sfoins on) nrotllin!,; GIl (no,\\[ ts tire R//(?) e riiourfirout;ory i S&l 49"-4B" II/IOl?t U 6t con *w.r 3 t ioucir) Ga., to n,g y cu v Radow Till(?) a n or tu or 4 8."- 54 " IIllol81 gy ~ Sa n,ple 1o ur-SCro Rodner 1rst Nun tro) &*~ Till(!) a sa,, rte ro Wet Wei tst-l933 O 9 D<y Wei Ist-tugig "_&'l,,"t_,",eo, ZSGS ; EB ~!o 60' ,,~ ' #,, CloI lll10/6I 9

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SGI fro "- 7A " Ill10lBt Radnce 6 Varved clay {>ar,ac.sie p } No Test Rau, Vattes son,e iroor dui,9 1711 (!) iMoist to fise Isem tvjn

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EGI W-76" Ilifol8I foucis) G *Y '*. ly g;;( p,,j g;\\fy ctq ";ge,n Yellowts y NYW P, fo "-e s' No Test Run ye!!os,% MassHe clay 5me arous .Sutty frons 86-9F' Radnor Star'ns enid oc,9m'c p*.tfe<T ' no $,M,on,93 _ ' y;;j(7) n 6"n*4 (p,;,7 go 4g,, a t ior ~ CL'*"9es 10.%Y 99" 56I 78"- Ble" IlllolBI G,',"Y * ( 'a so$ $p: cky,ssessive Wlfh wort fostelt) in y rra n, sfa as crHke hoffesn 4 \\ i loYR flache clay, pliable, sq,,,ple Taken for Radner &ll Senre s'<ws Staar$' ('ernseabillty fest (9) g;jfs) SloI 'lO'.N"' 9't"- IM " ' BV~ 9' " I'I' IOI v Test Rssn (II) 10YR riose s;I(y Sond Silty Souse '(Tonlans) Wet Wright-A713 Gl6 n ('m tj as,e e 'jl' S,,7,,, S&l '9I"- 4(p'" lIl10l0I p,ywe;3,t-;p.4,ggg, I ~ Sa,nple firssing Sitty ~ So,.a (?) %t 91," - II1 " si110/21 (Toulor) u A c -4 i. -r. r-r- .w

ccre Description.s _ M

  • *d Smeke ntuvel Els'e'ribedMo,*stue content color Acid Test Litholm kemarks P

Well* r i A/ owe tio Test > % s 10 1 ' k) fine 51lly sa,,A W'"' " ' l'I8 c odly'.Tvo.,StoirS S* *' I (Moist la fhe "i'h Scal ll4,,- IQf llll0lBf io.ra,) Ba~,% s UCI (Tc.olcu) yejigg Scirple Mr'ssrh3 City Sand (?) I R(r" - 13 2 II/10lBI (Toalse) 3(,; ~ s l'i_ne Silty Sosd mixe) Hut,et rlo Test Ran 'N 0"'. and doy GU (.7) i 13.7"- I36 " lillo/BI (Saturofed) H 4 .I'SSIW (Teulots) I St, I Sa f e to vt-136'to Hul,'c k l Tu'll (.t) 1, I3 0"- 144" IIllolBI at u n Sorerle to tsGS-( y E i Efsl 13 0 - 14R 1 Hulic h TiH(?) 5,j ]4 A . 150 " Ill10/6I (7,y7,,,; .A Sontpie Mu'ssisy H u lick I 50- I 5(s'? lIllol8I T,*H M (Toslan) gc,; Test Run(U)' 10YR Hedius,, to Coavse and Sa,,,pfe to uf-rSc,". Petfly s l'/i weYtt usedil"+ fo lavF l'8

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IIII#l0I O,, we;pt. 30s..n ye$1owo% ",""d' 0 RW'S HUI! l Sam e to 1ss s. rsa'. s Brown Goit f (,.0 " I'.'in - I4.2S ' tio Tesi San Sonyle Taken & Pel4fy 'Y G* **0 llG"- 171" II/IOf61 (Satavaleil tio 5 "- lis(s,, $yy ~

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, con Descriptions _~4 yP_* ed ' ~ oa!e'ribedMeistue oastent color Acid Test Utholm Remarks W ell

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'.,,g cf,g si,Yu"* cu,a 9,y lW fo N loacV) yehtowa% SirI M B,, - 3 4 G,, y,ja4jg; hcl I' B<cwn ~%nol'IC l'e bbl i l 00.!,- a t.o y 5$g g4g". gga" iIMIBI lo1R. F4,ctavelw;ths,,vtl Contact ios titr's l'clI,1y AI.0 - 31.g re h6 & t~o sos,all cch6le. Soci,In1 %d bli n y,d,;,31 o f(n,,.,y, 56I asa "- QSB I'!N4lBI g% bt ihe iof'id'avet s;It t %,*Y f" g;;f g) cII 1 %;;I,Je 1cae= W c silf(?) .? ~ .r:s.n.o Ilusu.nq ~ tila4let DSB- 264 " c gg 10 YW hlassive,Stobky Svoy Tc,y,;;(, A 1 . '.0- 24.0 GI' Clay w,11, Smallto n'edian Gllt(?) s' Ab4,,* 3l A,, qqjp4jgy Get rehbbs at Ibe toptidle.; SGI dcwn to cfoyeySitt at it - bgtn,. I"{ Cla)'ef' S;It Teneriffe %.0.Y1.4 5"H') lilM/CI Ne,,ni;,si.

Yellowdl, 5GI 3I2"- 353" l

<1ls,1cs1 safer,raied) &cwn Samye Tenedlfe l ~ WI,1 3Y,o

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56l 3s3"- 38t" lll31181 No Tesi Ran SiIt Isih SntalI, Teneto'{}e L

  • ?.o-u.o h>ediu *,and large S,lt(r)

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Q --a. e g 5 3 4 g I b* 42 C Y 3 b 0(.,A, (U $ $ hk) b 4 '&w .~s

.- oy e

x-- % % -o g -- m: u a, m.E es-n- m _ -a c U h 'G C. 4 e &,. ta 4 w = .5 a $gg = = = = = = = Q 3 ::- .O U G'

  • t

.G. .x.. c .v .u .n k -S 'k 9i( e 'd et c2} 'u 3 te 1e x b O C

  • tt
  1. g %Q * 't -= 3 E dgS%f 2{gM u q.,

t 2 8 3 N-e a:E i.s -3== x 2g S '* $2 -[-Q ni -s 'B :*~ 6 a;7 o r O U *:- b 2 Q ff y e n 'e e

  • w==

O 'O 0 G n R O % v .g & i' ? =9 =-5' 2 = =

= = = = e o _D 3 .'D 2 '(* v O -4 a g v = gT C-N D N N b CT v s. <a cd m 03 m Q Q N h 'N N N

  • U h

CD e. ~ 'h,s. k. k =e I 2 -hr b N C 5 = t'- O

b. I E,

4 o- .S 7 #5 9 N + H o etr 4 M N t'

  • += -==

I g =. 0-cy Z r n- . x""*to S 2' i i , = -O I Q . o. [ s. 's I l =b D _M' l C== 'N -== N b .e ~ 4 A < s

=

m en

n e.3 in m

(q 8 4 a a

W. b ~~ r g ~'O* h a w., 2w s -e

a u

c.t =-

a

,,.,. s u N -.s h 'g N( D n - .2 ( g, g 'r 2 7 g -. 4 4 >, 4> T N 2 o... - k hh )$ Mu

  • M c4 hu D o.'

<r, v .m 0 &3 E 4 >- -k E' s.% ET k' e 5.2-S 3, S C-E 3 5-T _g u* wR ') T

2. =.

J2 O f a >e a o eu 5 g k m$ NS '** 4

      • ' W

( 2 . 5 *8 bc q '& - A

  • 3 M '*-

~9.'" '?' c' e - % y Q 'N ry v s -u 6y aw ~ 2 C~-S u m Y) G o.s hw -2 w %a s' c-w A. w-a w % -G .me a wa '*t-s .a ts =o % N u swa .se w T"- 0 D es( Q 4 to ', t O O ts -o .,,,3 G M D W 0-O M. Q k O ~3 C'u o (./ m %~ %* ~ u = e ~ s ~ .O tJ @D2 4 S. .i ~5 S '^ $E % 5 w s $ ;2 -3y "j gl', 2 6. :: fr " o b -t -=. N o.py.?. t o o % g, cyA g:y:g % o o g g 2 Q g

4
  • I g

C '5 -D o k4 o <J -~ U D ** Y m% % 'm-2 .m 9 O 2 ~ w o. 3 s g3 o o w 4 Og II Q D N O I Jb h , ss W W W 4 3 is is-s. ~ E C3 %S CY C b O d D g M O N k b H ee ei G is. ~ sa 4 w y cr .? lq . i ?. r i w* ue M Q I h A g-M ,3 6) 's3 O ff b Q 9 }*[, m ^. c) D. CD y D tD 4 % 4 tu o s - + ttr rg e. CT rr er M ct nr er s. cy b d \\ m t n m m s-u- M O O en s 3 d 4 4 1 s0 N3 g Q d h a d i,- b

E* AI =s '# -2 's 31 5 -e< 49 J -)4

. c e

4 -e -a -# J -l hs24 =c

==

s

fi #$ = le R ga t ct te t 9 2- @ %c

  1. 5

= 4j f m ,t w ,q ? Pj IT o %, x .h a w .u '? -u @o m. D,. 2 =m b

9. *n.

G.'a s. s-G e w 2 s.u Su e. y _ g JR s t e 4R GR o-Tv.w -t ,'1, C s s e e s

  • a

== - TJ t r o w

  • w e

n_s o w .- p v.t w $.5 .ar eat

== g *u c sw Eu m s x o s ~- z, ~ o ss -g = 3, me = x ya= G ~ 4.= c g z e c. s. Ee Dkk G '~ 3 sg y +. Y.- *C ?.k

u. 2 w$

E *' w k2 g e o a m s n-v a c g b &:.= .E 6 @ 4 '. = = a x w ~ $g 3 e $ a! 'Cn N :x! a u m. x

== o S o r u 4 'i s. = o a c;e -~ n O a.5 % v sn s

r s o

~+- w% w .m .g

  • U 4 o O

O Y =w N W gN T Og D ED R. W W E om w a e ~& s s ~ n n g n s = = ~ t y e g N L% gm g. m. + m + 7 m m m k, b, m h "h kE k 0 ,m m m am m m m. m m h m in m t. m i %l O O O O m os t. j,' '3 0 I. 4'%O M' Qy D O

4 ~~~l

5. m n%

oQ c ** - ~ N

  • l'. %

en g e Q. 4 'J 1 ,Y "J E 'h $k ( Nk $M s., .) w % .= e'- -a 3 0 w $.IM e W 2 b s' N =t "O i o i + O, tg? -ae w .d k 45 2 .w s % D_ p.$ 9-Ta. 3-W " x T 's' g-1 C4 (1 % q V) oy g w

  • C" N

tr D h '6 (g V) C o5w c):': J id o ->-o

s. m.

C '3 ""

  • 53 th

,o ,.c c .ir x, n-4 -.o w u r 55* Y'd " N,$ g e r r n.S e N eo s+ r m 'o o "'t,' d 4 ON2 r 4. u *3 '* :: 2 '3 g '.2 0 2 se 2 9 o s % -Q o .- - w ,g oeI go -C Q Q % u' IAUh% $.a t w 5 M u k %DI 4 1 'd s-n 8_ 'U su g h G. y c 9 't -h

  • % TS o q o

m u 51 -s a g w m O =$r 5 .N sj s.

  • tc o

n D gM U o w a2 s-u

r 8,
  • T -8.

O = w W W D O'T as 5 5 W W s = = g o O m ~ % LA o ? u o- % a l c H $' +i 6 y N % g 't' i e-. d q, h 4e i 'o = c-a a m s 4 4-I id + m 4 = m s., m m 43 -O o D NS 3 ls) 6 M M a s

s Con Descript *ons I Well

  • SampkgInterval pege,;baj no,gt,g, c,,, tent color Acid Test Litisol*w Reussarks
    • Pas

~ ~ 0-3 ^'o Test Ra,1 10YR ^ illt' wl tis soure Ikons (;f& elktveston 9_ g. q/j7lgq MN f* II1! Ba+1nish Wu'ils Voo{s Lise (Nst Loes' g(,4 tottels) Yelha ljtj l.5 O*I I st ,g Practocolly no saoud Loess 56f 36" 7p" Qll7lgg Pale or chy Yelkw A*51 St'on12 S*rIi w u*ti, So nte Ct[careaaS Qoei. ?o 'ghll' -6l'T'M N '""',L9an* Loeg Sb4 't.t"-Ios" RlI7/8R ofive Yelha 9-IR Il 161R flodesale Cansple to ISGS-Peoris bl+

    • ct'b" 147"-14+"

Loes. Sb4 106'- IH " pjj7/gp (Very Wef) ' bht. 1 lict yellowislo Sosste clav lessSes 6m,in Calcausah 12-If us lo yR Sosne scattc<ed kyk ' "" #"I 5f,,9 144"-IBo" R/I7/BR (Wet) ver n n thle Brok41 J G-IB n Varialle Sifht clayey' Gilt will, leactred l'eos ia 180"- Rllo" all?/82 (Ifoist to tise fo'"Y fl*fg#f".- Abu*'09><t Ihon Glaids L* e [ST foueh) La} tut Vellow If,- Ro,e Vuhble NO Cla Iberi.q g,yey Silt wills a tihtany e/Te<vesce,m ,.,, stas;w Loess 3 co E(,4 Ril.>"- R50" All?/62 i h lo YR Modevde t'eryfe,*,e Sa>rd, sitt calco<esas Toulon po,s at o 7 Reacihn and clay wille a few Hentb . ~- -vg/8 Qj17/8R E6+ as o. ggg.o ii:a g,4 jf eYfetitscenc Y "Y "' Toaloss ~ fop 3<adun gg,,, g,, E'"',S*^d' "g down to l NY 95a"- QBB" 5lI7/83 (gery get) g,,,,,, {,y gt t, 'II'*'Ud i yeflow IICI i.iif f sm.w r>cl>L/e s

i Core Descrietfo>:s Well

  • Sampf,*ng Interval veseribed tios'sture content color Acid Test Litholny Remarks h as P

R4-28 rWanse Sai,, pie

TonI,

' 564 Re g "- 33&" Rll7/02 IIISSIE13 tie,,,I L 26-2.5 No Test Rast IO1R do Fiore"g ><ashedGa>1d, Santple to.rCGss Youh r]lg elkn'esemce yell soetef W,'ff, 3gp ".3gg

y ffees (llan' H o d e n

564 255". 3S+" plj7)gg s y.,,,, t,, tjy a,go,ged 7,st,jeg y iouch) R9 S~- 3If Santric

Touls, EG1 5g4 ". 3 73" all7l82

'ItSSA9 /les.,be 31.5 - 3 3.0 110 Test Rass Sl' Toa ja,, Eb4 379n_39gn 2ll7/9y

  • 'S OD iI

U U-ll'"'b fal l 40uch) Yellaa

1 33.0-3r.o Sa>.,rle Tin /,,,

'N 'I'*'l SG4 39s"- 4q0" 2ll7/B2 3r0- 36.5 SGYSIl f'n' 9a*I'c d Sand, si,ter-Toalest 561

  1. a"- 438" 9ll7/9q (VIet) 0"'"Id*

'. h t' Y' "'co s",n"u',CI*l, S . I' tiensLe coy , an tro,,,s i 1 ~ 56.r-320 sa -rle ron/oti

...y yy_444n 3//1/82 OSI*')

'I'" O " ,,,, o. 3g,5 love 11cdian, Smined sittj<

Toulos,

, Gib sand wi{l, nusstemis fle><strer Elf 444 ".46p" Ql17/BR (vid) Boi.sish H peg,sles and roey Yellow (<a g,,,e><ts vartable Th,eStaissed wellsorted Sansele to ur-Toulon 38.5-90 Sa,,.; wta, s,o,,,e p sbles Qll7/92 ("I'0 yegg,;3, 561 4ga "_4go Ero.i u,$ a na cmIfn;;ments, ce,pe,,,,,,,,,,g n_ yo" ,,,, y l y, H n s u r,.,. a.

y C- ' 'C { "b I :.4 fR A *: &G G O l M D e h t ,+ s % 1 9 m C C M 4 49 'k a A

  • o-w 0 w

s. I c.w + I q e4 o m% O m d9 Wu EA u ~ A7 y q.h = g av w .U M Q o u:,s.,- -c u ?, g r %e 4 $.4 w R U g e@4==. z s y p. .o o ~C Q

  • yw-A U

D Mk b M g G w g D Q 2 %w g Q { m h E

t..:

o u O C.a k o *l i 9 Q g

r
  • A$.&

&,w n i x =e ~$ 0 0 g i. U -.43 CV W r '~ C3 C3 l D D o e n rv n ~ e t, = 4 o. rr o. g t 5 N. 4* I e ,x i =i 4

'I, e

--= o n-A I gT c3 0- ] o i a = + + k a 6 s l

~ l Cort Qescripts'ons % sling.Tnterval 0lgeribed Hoistnwe Content color Acid Test Litholny kemerg$ 1% posed ' WEII " I Y"C O - 0.5 da Tc ; i ;d..;

7.Tye ^io

,%criy, bleegy S'aiI Sa,,,pfe to vy. o. ~ l'"N lifIn '"001Youl] 'Sp o. (, ". ll1glgy (Iloist ia iIrc Iici ond snact, O(go,nc Sangh 10 S0 y n fou,y,) BGS - 3,L S,, ~n tsfu[al, Se,*e l'el,Lles Sao.cle to r 53"-3,S" Ta,,enge f 0 S~- 3 0 '*l[,%' Gl'bW. Flaty, clayey silt, witI, u Sla'i (c"- 34 " I/n/.6n "lb"'" NNI ',lb$,",f'"'fgg siit(r) t s,,,,,f <o [*,'Nl,'i, *. ' re(AIes ICES

  • 30~~ 33" love nkpe riotY snir, c19astic Sa,,,ple to ur-7a- 7f Tena;(fc h

So -(,.0 $$5I '"^ I" ' ' "'ll' ' '" ' Silt /?) 5M 36"- 77 Iiniay (t.'E5,1 imktto I e ' i mr wl lense s;suved G""'P !do o 1565 W. 74 " ', feat h) t> o.1, can 6.0 't.0 to YR Flaty Silt w(11, lenses Teveriffe Of thfl'ered sInb sitt(r) I{IIl,op lukisi Souse sand a,jd.sonje EV 7Q"- 108." y Cwy lign'te 9.0- IV.o Gangle Tenuo'ffe 1 fisssin) Silt (n Sgcg tog ". ;4 4 '* lllllGR 14.0 - IG,0 ' Hamilte ch ey Silt so,,,7(etous. Tenr<1ife y I 8 '-18 0" S[Itty I lllIl91 Wl(h nrony fel,hh5 -

SM IM,,- 100 i

san @/e.fo I rdss - I'7C-17B" !!5.0 - 18.0 po teri nu,- G u Y 71 No fisssove Gilly ck,y, Teoraiffu~ Vanted, w,VI, Sand ' g;jf.(, ; ' r"! llggjUp ()b hf to ll.e Li;Ist

  • "' "',' l'

""A'"""' !; 5(fl leo"- Als" ,,.., g, y nq Go'y sonic l'c6Lhs, ["',";!>Ic Va N Tener,*ffe IB.O - I9.5 ?' g lig, g,,,, !,,,,,, s:ltin gc,, age,. agr. Ilute2 rg..c::, < t. n., g. cur Iq,S-al,o 110 tcr.i Ratu ID W ca,,dy Silt witt, so,ne_ gg .Tb] a3p.g5p" lll'IM (vkl f., Ib '. Ib. SM'll lenses cf O'"'IN fu , g,"' y'" 1,,, i l .,,? I.inile TGGs .2W-nt"

l ) .y j'.'..p;i.)' bo,3 Core. Descript *ons .O Well

  • Samp%g Interval Se"se'ribed Moistue Corstent color Acid Test Litisology Semarks' k os'd P

farere 9I.0 - R4*o Na Tesi tha ' lu '!n Sion s. Ssn4y silt intenal2(cd a TM'"- Red'*". wilh 1ny c:,Ily cl.1yas:4 b/p 9 f . ;g(,3 45gn_ggg" pan,,i:I, 'gf;I' blact, wt,o>ntehtis &"W o,, SiIty cLey, sosne Irl,l>lcS yg!(p.; n-Toalost lo w Fr;te s,It w,* tis sonie gg,0 27.o 7N Patltsis c[f,if t Sound, - I ' Sh'l 269.- 3R1 " lllll69 4'f' S*nall rel,htes arid,., l :. - Mesnfrs- 'I y V' d.stit Fix*a clage)y S,ItwfCarbonscients IOYIE ^IO Gil.[f D'?dlit!" ~340151!0 ^ Toulon 220- 30.0 to l[" Sand s4iG rehl' Irs fless l.cc . llI/8R

(lif, lilly morht fj,gug

,,c y l (,(g,,latej y,ys, by. SIII 324 "- Sw" , 77,c ,, y s.ie sc>, stau,,ss c,,,v u ~ I0dl#" C' I*Y 5'# #'N """,I 'Doim,dsofWe,3flicclf >d lI'"'g "' E'!' 30.0 - 37 o le Cui n'51' 39o. 39s" llIIlt2 cj'{,,h g, sin e, ss>n'e-iron stains, 5(/t n and Ir,sscS of blacli (;,,.,rn tarhumacenus clat - 0 s e"nny Swpleto 6-Talon fron i, 430"-4 W g,,,, g,,, G'Ye,esig of Walltend 33'0-38'RC ~ ggg{gg g, gg,c coarse Sand Cl>akoal 549 39s_459n llIl/Bk frayivnfs of Coqjf: rW.1-U H J / 6d*/ t 18 (C) un fondd '% %$ G c - 440,'- 00,, ,;o,, gra,;,3 se.ac - e.o 2l,i,',':![, "" * ' I*Y i"'",,i,d S*"*

  • UI 4w.<ce~ ihathe>rd

~ uiti, sense. cart a a n stuler ao m". gog " Iltlin. Ggfo r,n,,,,nt, or u,,,ter, xps - 1s4:4ss,, cost un.n,eas sinte ,g l;a' ');, L , $ 9' Y p' f. F , e.s m '. m.+ .p.!; L

s.;'
".y...

...~, f,!, [ ' s. M!>. ! : I'.. , i ,L ~ &g f, n $.. ~

.. [,' Core Descriptu'ons _ A *Enl NCIl # Samf sn9l* Interval Described Ifos'stWe Content Color Acid Test Litisoiny Rensarks A "f clatey Silt, u,11, f i No Tr 11 f:v.\\ late No ga,7,go1Sg5 N* 0 " " 'II Je;'nr e s>puty <cols mid e 1 acto,1c 'n ~ n NI o _ o. 6 412 t ll flor?.1 ( t.t O - 10 o itse f,e 1,I $,',', st_. if vulnoisl conn cu;stl ay Pel> libs nn,,m r'i?,'lf,,;s.r, Y'T GIIY G' ~%d Ihovu-1 o

  1. "A 5"'9II n'l'ble'; "

loess 00"30 ' G <'t lll3l0R G ny,. p /r o n.3aisirs v. yn _ gg" 570 n B<crisi love sin,9 crepy Silt, Vert Me,;, S,,,,y,f,35g5, p,,,.(, 3.0- 6.0 bl?. % foons ihr vrfcc Tust atra,,I.,,t

  • 70 " 7 2 "

' ' Y I' von stadts 11Ac the knee IIIN00 Bewva. li lici 570 3G"- 7Q" c.tIcaeeout G.,y R,cktousa gQ claytY Silt, Wills sn,,y c,,,,, j,,, 7Sgg_ Io 1? n S*"0 I'0 6.0 - 7.5 1/13lBR IO*II) D> r k Wille E' 'S' I'"' '76 ". 7 7 g tj'79 7p" cfo ur yellWo% llCt

p.... s.,

l'eo,;r Io r4 Silt, w,'1t son,e i n Lees $ 7,g-9.o YII Stallered iron and Ifl3N (gf to jfg is9hl hsowyassese staf,,4 p G70 90".jgg" Guy lu t h' cloye9 silt Will, Saml\\ . So,,,rle to VT-p '##t '" " os {' * "d '*'"' * *"5' 'l.0 IS'.O 't 5 70 i106".180 Il'3l62 iSakalcl) c, Sa>'syIe lo JSGS - gagn '} I10"- I10 Clayef a,ul 41,g (cpo,g' Sq uple to.fsg5 Toulas S 10 W

  • e lIEhlbe**

IC.0 - It,0 "U # ?' ' Al 4t3". pjg's 5'70 180". all," I I4lBQ (Wef 40 tile yc r,'< t, e, 0#'"# gf '#'I (mr Is) lb,v,, Tene <,'((c Silly cI.sy w,'tI, opun,eue Q. 6 Y 'HOUI"r and huncled G,'If 18.0-Do.n. lll1l00 (Sa(st w( e 5)-- - . p, g It l'fb b/d5 SYO Gl&*- A42" GtcyN/, ) ' j, ' [* 8e +8:p r g h '"' I0 YR i j,j,( S;If y;gfy a RO.0 -- Ri,0 - It sv inns f.fatisc. lllfl0A h..'.q _ r, n 5?O R4p". pgpr m..., r

g t b h ~

4

*= E ra .a m -2 s .a,. m = 2, e 4-xm

s. :

2 s 4,., - e, e=. e u e o 3 4 t ~, e3 e* c, ~ M u eq g et ca s = s = , c i i s = s_ m m m m e w (.D

  • e O

1 8 ~S M %, u rg ~ Y w w .,O_ C0-D 0 D 4 n ~ m k 3t 4

  • ?. O 4

d h e 9-9- S-E' E t c = s. -_ N ] o c g. .= s "e-A

  • u.

o .~ b.. "O. ,a +

  • - - 3 k

%s: . ~. .p .~ ~.C. r a w w = -( - = - s. o - o -r = e., u s e Z 4

  • l*

4 0% 7 ,%= t. Q- ~ =~ ~, 61;

    • D AC 2 W

'5 0

  • ( # 3 ht k ' s{-

5 s. _O 2 a -s s =; g ,,c,, -.s--- c,. c c '* e-- O ,s~ N -a s s. o C.O he X T 'n g M' N ". h>% M s \\. e 8 -h 'D U"" '"3 0 3

  • t

..n G g b d m' 4.N..

==O W Q E D O O ( V .4A W' { U.k O 4 -b SQ >==.: c. =-- g 5. .' 4 A '* A 'C-v a O ""3 '3 l'""' .* y T O Is * '= h V, p.,,*- e,,, f*- N .'9'= YE O -. ' -

x.
  • S q

w w ~***%. NY D h h j. Y j EE h 2.'3 dE E *E C LI 5 : 5d ($ 4 I " U c E C h - m ~ g e. .t,; c.. = O % $ 2 C' e ek 0N b g i .4 o -= 3 s h o '.,c- - -s .,e ~ -e s

  • L-

' =. 1 E - 2 Y ) } e: eD 7 J O " '$ $. S 'C 9,. y, (o e'" ' /" 4 2 7-g 5.3 -?6-

  • y.v

, s w 's -s w -.2 r-g g 0

9. " $'-

C g C.) a e se % y yQ 2 4

==s h E . *U .C -O Y-- + O (,,,,3 t -o +. g w, o 7 C d D o c =, %g N 0 n. s --..-O 2 . '.= = llg a "E u 4 9

      • '4
  • ,A 1:

. U t ' T:=- ,in ~. g q.% 2 w O =.J w ,: ';.r-.-.

  • "'13 g

W D q.' N Q .Q k.p q M k dE ~ k' d6 r .$., u .Y -s 'y

  • * '. *. ~..

tf .Q. g Q Q -b D"'"- Q %~ M t-Q -m. e l' s,

~

-... :l ~ Q~ h,,,_ Q Q 'n__ M, ~ O. .D. N

8

? .6 fT c: M Q s s 4 m C' N. I i Q q- ~ 4 I g-s -) 1 l 3 1 b I t = g g g g e 'N Q 'm b 2 D* O ,.3 M ,a,s .= Q h i

n. O C c'

M m 4 5 6 a g j $. ~ 8 Sp g g: Q ~~ C"" C o or ~ I ( 1p q-R b-ts 3 3 s a,- e-3 m m u 4 I d a t s m.

D ^

  • .c.

b (5

  • 6 s b,..

.n -u t -.s. 4 u s, o

s c
e..~_

,s - - rs -a r .3,-*= a -e .c

  • a.

o o = s

f( RM GW d R.

  1. :t A$

.9$ WV M

  • E N *h %

I g - su a ^ i o a M 4 o g o. w% 2- ~ M& -= g g yaeo *. q g e oe wR Ru n, H o o m .o a w ,3 Q M 69 g

  • k b

A J,.. g M*t i -il -F,.'-t ' t..: i -e t, ,E 1 -= w _g -: 2 E m d.w. .w

?

o o T w e w o .f"/. +C

d. s

~ 2e.t .- t, . + w: ~ s-e a. .h 3 n w s =5 s 'a ' m (J 't C e o M -: 5 ,; t u c u

t. =r =e=:ec L*-

e .2 3o 5 =x -u m w g .~ ;; % 2AE .h I w G '$ ^, E.vP 2 l', 3 ti x.6a s.1 & '? 3 n 4 .Ebu w = '3 i; Y., %,.5 ~2 5 : 's , 3 C. >u3e e.,i_.*d T ws-r u w w: sm e O

  • .. g..

a-em s .% AddN %. bC hl d4 .I. I b 9 >-o "g ,o _ =)h d 3hdE $$1 L "..i d Y d.'[ 2 4 ' *$J I; ?'. j:1 - g a 5 -- c = = = -

  • o a s x w-

~ 4.a.b .r. a ?

  • T x

c.,, g h* % -S g. M Q -M ~ ^ E .w p U o <Y k F- > R.3 s x u C y! 44$g Pt 3g G

u. 5.t :9 w

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ISGS CONTRACT / GRANT REPORT 19816 e WATER RESOURCES DIVISION /USGS P.O. 100240 e 1 / A surficial electrical resistivity survey east of the Sheffield low-level radioactive waste disposal site, Bureau County, Illinois TIMOTHY H. LARSON lilinois State Geological Survey December 1981 STATE GEOLOGICAL SURVEY DIVISION Natural Resources Building 615 East Peabody Drive Champaign, IL 61820

0 CONTENTS Abstract 1 Introduction 1 Geology 2 f Resistivity survey 2 Field method 3 Results 4 Interpretation 6 Conclusion 10 References 10 TABLES 1. Resistivity values of common sediments 3 2. Electrical zones and their geological equivalents 6 FIGURES

1. Site topography 5

2. Resistivity of zone 3 7

3. Elevation of top of zone 3 L

4. Depth to top of zone 3 9

5. Thickness of resistivity zone 3 11 P

ACKNOWLEDGMENTS The Water Resources Division of the U.S. GeologicalSurvey (Illinois Branch 0flice) authorized and funded this study through the University of Illinois, Urbana-Champaign. James B. Foster was project coordinator. This report is in partial fulfillment of P.O. 100240. I wouldlike to thank Paul C. Heigold and Beverly L. Herzog for their assistance in the fieldoperation of this study. n. .,_w

4 Table 1. Resistivity values of connon sediments Resistivity values Lithology (ohm-m) f Loess 15-40* Till 15-45 Sand (dirty) 50-100 Sand (clean) 75-100 Sand and gravel 50-200 Gravel 100-800 Shale 20-40 Sandstone 100-500 Limestone 100-500 Coal 1-1000t

  • Higher when drained.

t Data from Parkhomenko,1967. The electrical characteristics of the specific lithologic units that overlie this site are not completely known. Table 1 lists the general types of sediments typically encountered in Illinois and their approximate range of resistivity values. FIELD METHOD Seventeen VES stations were occupied in a 45 by 45 meter (150 by 150 ft) grid arrangement. The Schlumberger electrode configuration was used in con-junction with a Bison Model 2350 B resistivity meter. Maximum current elec-trode separation was 63 meters (207 ft) except at some stations on the perimeter of the grid where fence lines and topography limited the maximum current electrode separation to 28 meters (93 ft). The L:t ratio was kept at 10:1. ("L" is the distance between the center and one current electrode; "t" is the distance between the center and one potential electrode.) ELECTRICAL RESISTIVITY SURVEY EAST OF SHEFFIELD RADIOACTIVE DISPOSAL SITE 3 l

RESULTS The VES field curves were interpreted using Zohdy's (1973) automatic inversion program which assumes horizontal, homogenous, and isotropic layering of the subsurface. In this method, the observed VES curve is approximated by a Dar-Zarrouk (DZ) function (Maillet, 1947). The DZ i functions or curves are themselves functions of the resistivity layed ng parameters-thickness and resistivity. From these parameters a theoretical VES curve is calculated by an inversion process and compared to the observed VES curve. The DZ curves are varied and new VES curves are calculated until the match between the observed and calculated VES curves falls within a prescribed tolerance interval. The number of layers in the resulting model (detailed solution) is always equal to the number of points used to define the observed VES curve. Equivalent solutions composed of fewer layers are determined by automatically smoothing the DZ curve of the detailed solution and,invertingit(Zohdy,1975). The method provides electrically realistic layer resistivities and thicknesses. Electrical sections are then con-structed by plotting the electrical layers, with calculated resistivities and thicknesses, below the center point of the electrical sounding. These sections are close approximations to the actual geology. Because the final smoothing of the detailed solution is done automatically, an electrically equivalent solution may be introduced that does not directly conform to the geology. Geoelectrical sections were obtained for all 16 stations and are plotted in five north-south profiles (fig.1). In general, five resistivity zones are definable below the site. The first zone is a thin, surface layer with low to moderate resistivity values. The second zone has consistently moderate resistivity values and is fairly thick in the western, higher por-tion of the site, but is thin or absent to the east. The third zone is a high resistivity layer, which is also thicker in the western half of the site and becomes thin or absent to the east. Below this high resistivity zone is a fourth zone with low to moderate resistivity values. The fifth zone-is a discontinuous zone with high resistivity values located below zone 4. When correlated from station to station, the upper surfaces of the two high resistivity zones (3 and 5) appear to be horizontal; but because 4 ILLINOIS STATE GEOLOGICAL SURVEY CONTRACT /GnANT REPORT 6

9 4 A surf.. l electrical resist..ty survey icia ivi east of the Sheffield low-level radioactive waste disposal site, Bureau County, Illinois t ABSTRACT An electrical earth resistivity survr" < conducted over an area adjacent to the Sheffieldlow-levelradioac,. aste disposalsite in Bureau County, Illinois. The purpose of the survey was to determine the extent of a deposit of sand belonging to the Toulon Member of the Glasford Formation that was originally encountered in borings and tunnels at the disposal site. The survey was undertaken at the request of the USGS in order to assist in planning an exploratory drilling program in the vicinity af the Sheffield disposalsite. The survey was successfulin tracing the outline of the sand unit in the area;its thickness is estimated to range from 0 to 12 m (0 to 40 ft) at depths of 0 to 7 m (0 to 23 ft). There is some evidence to suggest that portions of this sand unit are presently undergoing erosion. INTRODUCTION An electrical earth resistivity survey was conducted in the SWk. NWh SEk Section 26, T. 16 N., R. 6 E., Bureau County, on August 4-5, 1981. The purpose of the survey was to determine the extent of a sand deposit origin-ally encountered in borings and tunnels at the Sheffield low-level radio-active waste disposal site. The results of the survey are to be used by the U.S. Geological Survey to aid in planning an extensive program of strati-graphic test drilling. The survey was conducted in a gently sloping pasture adjacent to the Sheffield disposal site. The land surface slopes east and north toward an area disturbed by surface mining of the Herrin (No. 6) Coal Member (Smith and Berggren, 1963). The land surface is poorly vegetated with several well-developed gullies. l ELECTRICAL RESISTIVITY SURVEY EAST OF SHEFFIELD RADIOACTIVE DISPOSAL SITE 1 l ~. - -_. _ ...s.

9 GEOLOGY The site is underlain by unconsolidated glacial sediments of Wiscon-sinan and Illinoian age resting on Pennsylvanian bedrock. The Pleistocene stratigraphy of the Sheffield disposal site has been sunnarized by Foster and Erickson (1980). Their description of samples from USGS well 501, i located 15 meters (50 ft) west of the southwest corner of the survey area (fig. 1), is used as a geologic control for this study. The Pennsylvanian rocks were not sampled in this well; however, exploratory boring B (ISGS county no. 334), located 30 meters (100 ft) southwest of the survey area, did penetrate 76 meters (250 ft) of Pennsylvanian strata. The uppermost bedrock is shale of the McLeansboro Group (Willman and others,1975), which overlies rocks of the Carbondale Formation, including the Herrin (No. 6) Coal. The Herrin Coal was encountered in boring B at a depth of 29.7 to 31.4 meters (97.5 to 103 ft). The Pleistocene sediments penetrated by USGS well 501 consist of 4.6 meters (15 ft) of Peoria Loess overlying three members of the Glasford Formation. The upper and lower members are the Radnor and Hulick Tills, respectively. The middle member in this sequence, the Toulon Member, is a channel-like outwash deposit. This pebbly sand, lying at an elevation of 746 to 732 feet, is the main target horizon of this report. RESISTIVITY SURVEY The electrical resistivity survey provides a means of shallow subsur-face exploration by the utilization of electrical measurements taken at the surface of the earth. An electrical current is forced to flow through the earth between two electrodes pushed into the ground. The voltage-drop created by this current flow is measured across two other electrodes. The electrode array is expanded after each measurement in order to increase the depth of penetration of the current, and consequently, provide information from greater depths in the earth. This field method is known as Vertical Electrical Sounding (VES). The two measured quantities of current and volt-age-drop are related to the resistivity through Ohm's Law. Since resistiv-ity is a characteristic property of each earth material, different materials can be determined according to variations in resistivity. 2 ILLINOIS STATE GEOLOGICAL SURVEY CONTRACT / GRANT REPORT 6

Table 1. Resistivity values of connon sediments Resistivity values Lithology (ohm-m) r Loess 15-40* Till 15-45 Sand (dirty) 50-100 Sand (clean) 75-100 Sand and gravel 50-200 Gravel 100-800 Shale 20-40 Sandstone 100-500 Limestone 100-500 Coal 1-1000t

  • Higher when drained.

t Data from Parkhomenko,1967. The electrical characteristics of the specific lithologic units that overlie this site are not completely known. Table 1 lists the general types of sediments typically encountered in Illinois and their approximate range of resistivity values. FIELD METHOD Seventeen VES stations were occupied in a 45 by 45 meter (150 by 150 ft) grid arrangement. The Schlumberger electrode configuration was used in con-junction with a Bison Model 2350 B resistivity meter. Maximum current elec-trode separation was 63 meters (207 ft) except at some stations on the perimeter of the grid where fence lines and topography limited the maximum current electrode separation to 28 meters (93 ft). The L:t ratio was kept at 10:1. ("L"isthedistancebetweenthecenterandonecurrentelectrode; "t" is the distance between the center and one potential electrode.) ELECTRICAL RESISTIVITY SURVEY EAST OF SHEFFIELD RADICACTIVE DISPOSAL SITE 3 1

RESULTS The VES field curves were interpreted using Zohdy's (1973) automatic inversion program which assumes horizontal, homogenous, and isotropic layering of the subsurface. In this method, the observed VES curve is approximated by a Dar-Zarrouk (DZ) functior. (Maillet, 1947). The DZ i functions or curves are themselves functions of the resistivity layering parameters-thickness and resistivity. From these parameters a theoretical VES curve is calculated by an inversion process and compared to the observed VES curve. The DZ curves are varied and new VES curves are calculated until the match between the observed and calculated VES curves falls within a prescribed tolerance interval. The number of layers in the resulting model (detailed solution) is always equal to the number of points used to define the observed VES curve. Equivalent solutions composed of fewer layers are determined by automatically smoothing the DZ curve of the detailed solution and,invertingit(Zohdy,1975). The method provides electrically realistic layer resistivities and thicknesses. Electrical sections are then con-structed by plotting the electrical layers, with calculated resistivities and thicknesses, below the center point of the electrical sounding. These sections are close approximations to the actual geology. Because the final smoothing of the detailed solution is done automatically, an electrically equivalent solution may be introduced that does not directly conform to the geology. Geoelectrical sections were obtained for all 16 stations and are plotted in five north-south profiles (fig.1). In general, five resistivity zones are definable below the site. The first zone is a thin, surface layer l with low to moderate resistivity values. The second zone has consistently moderate resistivity values and is fairly thick in the western, higher por-tion of the site, but is thin or absent to the east. The third zone is a high resistivity layer, which is also thicker in the western half of the site and becomes thin or absent to the east. Below this high resistivity zone is a fourth zone with low to moderate resistivity values. The fifth zone is a discontinuous zone with high resistivity values located below zone 4. When correlated from station to station, the upper surfaces of the two high resistivity zones (3 and 5) appear to be horizontal; but because 4 ILLINOIS STATE GEOLOGICAL SURVdY CONTRACT / GRANT REPORT 6

o l l !j!BO[R[E' U CC A g Sheffield area h!!! I d l J \\ a.I N 9 ) { O Station number >O h 0 30 60 m 15 17 E e e o 15 250 ft k ? 11 1 13 14 g g g e Sheffield radioactivs waste disposal site B a -U i I3 9 8 % 7a 6 l e a I d

  • o I

3 4 5 1 2 e e e 9 ( l l 5. USGS 501 '"5*" Figure 1. (a) This electrical earth resistivity survey was conducted in the Sheffield area of Bureau County, SW% NW% SE% Section 26, T.16 N., R. 6 E. (b) Site topography (after USGS preliminary map,1981). Contour data in feet above mean sea level. ELECTRICAL RESISTIVITY SURVEY EAST OF SHEFFIELD RADIOACTIVE DISPOSAL SITE 5 m

1 the land surface slopes sharply to the east (fig.1), they occur at depth below the western edge of the site and are at or near the surface in the east (fig.4). INTERPRETATION t The first four electrical zones can be correlated with the geologic section derived from USGS well 501 (table 2). There is insufficient geologic data to interpret zone 5. It is probably a result of layering within the bedrock. The resistivity values of zone 3 at each station are plotted and con-toured on figure 2. The highest readings form a' semicircular band around the western half of the site. The extremely.high resistivity values at stations 1, 9,12, and 15 may be caused by the presence of either very y coarse sand and gravel or drained soil. 4 The sandy outwash of the Toulon Member was encountered at an elevation of 746 to 732 feet in well 501. Figure 3 illustrates the elevation of the top of zone 3 in the subsurface. The material in this zone forms a lens-shaped body in the western half of the site. A small extension continues eastward just below the land surface in the vicinity of stations 13 and 14, where sand and gravel was observed in surface gullies. The depth to the top of zone 3 is shown on figure 4. The material in zone 3 is deeply buried in the southwestern corner of the survey area, but it is at or near the land surface in the central and eastern parts of the area. Table 2. Electrical zones and their geologic equivalents l Electrical Resistivity Geologic zones (ohm-m) equivalent 1 17-60 Holocene soil or fill 2 41-53 Peoria Loess and Radnor Till 3 84-880 Toulon Member (sand and gravel) 4 9-56 Hulick Till and Pennsylvanian shale 6 ILLINotS STATE GEOLOGICAL SURVEY CONTRACT / GRANT REPORT 6

A .l 4 i t 'N 16 9 g. g Station number / . SM 0 30 60 m M 151 d. ) ,\\ &

  • in 13 14 S,....

radioactive wacte disposal site g { 7 G 10 \\ g 1 g 107 e115 ,N 124 220 O l 5 ,4, g. 3 2,,, enq USGS 01 Figure 2. Resistivity (in ohm meters) of zone 3 as calculated by Zohdy interpretation program. t +k. l 6 s s-I I"

  • ELECTRICAL RESJSTIVITY SURVEY EAST OF SHEFFIELD RADIOACTIVE DISPOSAL SITE 7

i.1 ~ s ,- 4 ,3 i i I,

1 N 16 9 j k 9 Station number "- -- 3 15 7 ~~ M 740 730 o ,oo 2bo e, g' r 9 13 14 11 s ,,. n... O n, ng s Ona b Om radioactin waste disposal site / / e 3 7 G \\10 O 745 740 4 735 720

  • 714 u

f '% l '3 A 6 j 1 2 105 9 l 746 \\ k (9 725 e 742 0 743 I l USGS 501 iscs i i Figure 3. Elevation (in feet above mean sea level) of top of zone 3. 8 ILLINOIS STATE GEOLOGICAL SURVEY CONTRACT / GRANT REPORT 6

r N 16 g j k O Station number 15 17 -~--- 50 ft _a p g,5 g 3fg 2 11 12 13 14 Sheffield g D3 G.5 90 9.5 radio.ctive weite g e dispos.1 site o E 10 9 8 7 6 QS 91.5 90

    • 0
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"e u 4 5 7 3 G 2.5 ~ N \\ isosimi USGS 501 Figure 4. Depth (in meters) to top of zone 3. l ELECTRICAL RESISTIVITY SURVEY EAST OF SHEFFIELD RADIOACTIVE DISPOSAL SITE 9 l

The thickness of zone 3 at each station is plotted and contoured on figure 5. The thickness of this zone exceeds the depth of resolution of the field arrangement at stations 1, 2, and 10. At these stations, the true thickness is greater than the thickness shown on the map. Zone 3 is thick-est in the southwestern portion of the site with a thin eastward extension. The lens-shaped body of high resistivity material in the western half of the site is definitely a deposit of Toulon Member sand; however, the thin, surficial eastward extension is more problematic. It may be part of the primary deposit, but because of its smaller size as well as its position on the lower slopes of the hillside, it is probably a secondary deposit resulting from erosion of the main body. P N 16 9 ) { O* O Station number 15 17 E F1 92.5 0 100 200 ft 12 13 14 sh.ffi.id 12 1 G3 8' /g0/ 4* radio.ctiv. w.it. dispos.1 site l m k 9 8 7 6 >4 e 2.5 92.5 2 05 l \\* g hy \\ i >7 e 3.5 O-4.3e USGS 501 '5$'"' l Figure 5. Thickness (in meters) of resistivity zone 3. 10 ILLINols STATE GEOLOGICAL SURVEY CONTRACT / GRANT REPORT 6

9 CONCLUSH3N The Toulon Member of the Glasford Formation encountered in bore holes on the Sheffield Disposal Site extends eastward into the resistivity survey area. Resistivity data indicate that it is thickest in the western portion of the surveyed area and thins eastward. Its extent can be best approxi-mated by the 150-ohm-meter contour of figure 2 and the 730-foot contour of figure 3. A small tongue of high resistivity material extends eastward from the main body. Because this material lies close to the land surface, it is probably of secondary origin, caused by reworking of the glacial deposit by recent erosion. REFERENCES Foster, J. B., and J. R. Erickson, IP30, Preliminary report of the hydro-geology of a low-level radioactive-waste disposal site near Sheffield, Illinois: U.S. Geological Survey open file report 79-1545. Maillet, Raymond,1947, The fundamental equations of electrical prospecting: Geophysics, v. 12, no. 4, p. 529-556. Parkhomenko, E. E., 1967, Electrical properties of rocks: Plenum Press, New York, 314 p. Smith, W. H., and D. J. Berggren,1963, Strippable coal reserves of Illinois, Part 5A: Illinois State Geological Survey Circular 348, 59 p. Willman, H. B., E. Atherton, T. C. Buschbach, C. Collinson, J. C. Frye, M. E. Hopkins, J. H. Lineback, and J. A. Simon, 1975, Handbook of Illinois stratigraphy: Illinois State Geological Survey Bulletin 95, 261 p. Zohdy, A.A.R.,1973, A computer program for the automatic interpretation of Schlumberger sounding curves over horizontally stratified media: U.S. NTIS PB-232 703. Zohdy, A. A.R.,1975, Automatic interpretation of Schlumberger sounding curves, using modified Dar Zarrouk functions: U.S. Geological Survey Bulletin 1313-E, 39 p. 4 e ELECTRICAL RESISTIVITY SURVEY EAST OF SHEFFIELD RADIOACTIVE DISPOSAL SITE 11

g } * ~ e, . ) e s'.! i.- W Table 1.-Record of we!!s on and adjacent to Sheffle!J Iow level radioacti e =sete disposal site -e 51T1 IDENTIFICATIOf: The number assigned for the hadwater site -h- 'e lavestory. It tenststs of Istitude Iongitude and a sequence l number used to distinguish between wells having identical latitudes and longitudes. 6 eOCAL eELA, W1MBER: The number used on maps, in reports and for recording data. I DWICR$illPs N. Neces 5. U.S. Coolcgical Survey. q, TUTAL wtLL DCrftt To nearest feet. Ilcr718 70 SC11tm 807T084: To nearest foot. CASING DCFTIts to nearest foot. WELL FINISII:

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DalLLING DCTIIDD A. Auger. P. peristalt!. 'p.aspl 8. beller. LITT TYtts RADIODETRIC AMALV$lSt P. Illinels Dept. of Pubile lisalth N. Itecol

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