Summary of Sampling Activities at UMETCO an July I, 2003

On July 1,2003 representatives of the Arkansas Department of Environmental Quality collected water samples at six stations on Wilson Creek and a t one station ion a tributary to Wilson Creek. The unnamed tributary flows through an area of mining spoil on U M n C O property. The water quality of the tributary has indicated elevated dissolved metals and low pH which is common in areas of mining activity. The flow from Wilson Creek and the unnamed tributary had been diverted into East Wilson Pond for the purpose of treatment with lime 'before being discharged at an NPDES permitted outfall. The following is a summary of the data compiled from the July sampling event on the unnamed tributary and Wilson Creek.

Station Locatbns

WILTO1- Unnamed tributary to Wilson Creek approximately 50 l? upstream of its confluence with Wilson Creek. The unnamed tributarj flows through a mining spoil area on the UMFTCO property.

WILOI- Wilson Creek approxirnate'ly 50 ft upstream of its confluence with the unnamed tributary.

WTL02- Wilson Creek approximately 511 ft downstream of the confluence of Wilson Creek and the unnamed tributary.

WILO3- Wilson Creek approximately 2000 ft downstream of the confluence of Wilson Creek and the unnamed tributary.

WTL04- Wilson Creek immediately upstream of the point where the Creek is diverted into East Wilson Pond for lime treatment,

W1L05- Wilson Creek approximately 100 ft downstream of East Wilson Pond. WIL05 is the first station downstream of the NPDES discharge from the Pond.

WILOG- Wilson Creek approximately 1000 ft downstream of WILOS.

+ In-sltu data collection revealed relatiively low pH at all stations collected with the excepuon of the two most down-stream stations. The most acidic in-stream conditions were noted in the tributary at WILT01 (pH 4.041. Dissolved oxygen concentrations fluctuated and exhibited no distinct pattern. The lowest D.O. concentration was present at W1L04 (2.55 rngJL).

B Concentrations of Total Dissolved Solids were elevated at all stations with the exception of the most upstream station in Wilson Creek, WILO 1. WILTO1, the tributary station, had the most elevated concentration of TDS (558 rng/L), The most downstream stations in Wilson Creek, below the discharge from East Wilson Pond, indicated TDS concentrations of 489 mg/L and 481 mg/L, This is likely a result of the addition of the lime in the treatment process.

P Using the ecoregion hardness concentration of 31 mg/L for calculating toxic dissolved metals concentrations as prescribed In the implementation procedure, the following should be noted:

The acute criteria concentration for dissolved cadmium (1.04 pg/L) was exceeded at WILT01 (13.1~ g/L) and WIL02 (4.12,~ g/L). The chronic criteria concentration o f dissolved cadmium (0.43 p g/L) was exceeded at the next station downstream at stations WILQ3 (0.62~ g/L) and WIL04

(0.74 p g/L).

The acute criteria concentration 05 dissolved capper (5.65 p g/L] was exceeded at the sarne two stations where the cadmjum acute standard was exceeded. These stations had dissolved copper concentrations of 38.2pgtL and 12.5 p g/L respectively,

The acute criteria concentrattion of dissolved zinc ( 4 2 . 4 ~ g/L) was exceeded at the sarne two stations noted above and at the next station downstream WIL03. These stations had dissolved zinc concentrations of 1360 p g JL, 396 p g/L, and 103 p g/L, respective1 y.

The chronic criteria concentration of dissolved nickel (58.4 p g JL) was exceeded at WILT01 and WIL02. these stations had dissolved nickel concentrations of 235p g/L and 80.8pg/L, respectively.

Aluminum concentrations were also elevated at WILTOE (9,180p glt), WILOZ (2,450 p gjL) and WIL03 (429 p g/C).

Manganese concentrations were also found at elevated concentrations at all stations with the exception of WILOl. Dissolved manganese concentrations were WILT01 (37,800 glt), W I N 2 (12,300 p gJL), WILO3 (3,460 f i g/L), WTL04 (5,628 p g/L), WL05 (1,990~ g/C) and WLO6 (1 ,I 10 p g JL).

P It is noteworthy that data collected a t WILUP did not warrant the water quality concerns present at the other six stations. In fact, upstream flow from WILOl proves to have a diluting effect on the contribution of flow to Wilson Creek from the tributary where station WILT01 is established.

UMETCO

Cadmium ug / I

0.19 0.5

0.64 0.42 0.34 0.41 0.33 0.6

TDS md1

489 635 336 481 66 t 56 1 662

Geomean 533.61

Copper ugll

0.7 0.9 2.6 0.35 0.25 0.32 0.37 0.9

Nickel ugll

21.4 13.3 21.8 8.59 10.3 10.4 9.65 20

Zinc ugfr

35 28.8 44.6 26.4 20.2 20.1 19.2

50

Arsenic ~rgll

0.25 1 , I 2 1.35 0.2 5 1.47 1.28 1.61

Field pH 6.35 7.12 Hardness 337 323

Geomean 0.300618

Umetco aata

Lab. saTdd xx1517U wrL;01 2ixr!-1?45 m f i 1 2(*nlTIB wtm XR31747 wLrn 8XCbl7M WlLOI

WM-ble M t (#Bvlurnltm mllm Cadmlm ChlsrMq(~ eopprr (p Rlld pW p Lsod (w Nltksl IW Selenium Pullrtm (m

W'l l lCUB Na&tam 25 724 3~31 265 382 4 DI Hadrcsrm 2 s M dnlacleo a7 0 7 ~ 1 ~ ~ d ~ r n w 3 8 v ~ u e w b d ~ ~ d b l w 243~dlomwt4d 13 t i d d w ~ W Wmtm Nm dalaaaa 7 13 0 7 0 1 m W W - W T34 ZW 4.12 203 7 2 3 s W 78 FiOl &ccle( 80 B Nol dQle4ev lm 0 7 r ( ~ l r 2 m 3 ~ l a & c ~ l s ( 305 0 7 1 Udl J E s 054 575 131 w ~ a a a c l a ~ 22 a H ~ I aarecfw 141 r m ? m k t a ~ a a a e 41 M X - . . ~ 074 n-a MMMU 8 15 31s M U ~ M D C W 13 s ~ o t a u e w ? i ~ a a

07/Df/1003 Nor aeteo W.9.* Wf d a m t 1 9 135 0.7 7+*2 323 ~ o i d e l e n 3'1.4 Nffderecr 2?? 0701.1M3 Nr* d*Iecld 19 3 MdafB1CFlethkl Made 1 5 8 Hd6.t*oa(l 7 15 310 Not deism4 12 5 N 4 1 d . 1 4 ~ ~ 267 o 3 m 2 0 ( a NoI a*eFIec 24 ? NaMcC(ocW 121 O M 8 Q 320 N ~ a w - r l a o 3 21 NciMCCTec 281

OK!JROUl 1.11 YI.4 Hot detecl 0.5 1 5 1 O.a C.35 331 Noidetecl 41.5 Not detea 194 < < - ? 7 , m NddrreOp~ 49 2 No1 OeteClK OW 115 0 2 7 E 1 310 bn saectle 12 7 N+ n~teaea 192 ~ 1 7 ?'m hWdCdCI@a 2 7 3 1 04 035 801 P 9 5 bS 2- k3t detedsa 21 8 N d dctscted 1YA C ~ Q ' ~ 2 C 1 3 2 l h l a o r t e c 1 ~ 5 1 6 1 7 2 Zh2 I t ? 495 88 FrA Oerncttl nl.2 N u d m e r l r 127 VkTlZW3NMOrtsc leO Z 3 B 6 3 s ICa 2B1 356 3Yr 234 N 4 O . t * r l ~ ZM Net dc'ecrec 15 9 VYLJ(Z<*U W X O C I ~ ~ M 51) 0 2 017 2 f 1 145 576 L4 hol oclrm* 10 1 NN osccla: 677 I ' lP?'O3hWdtredrC 985 1 5 1 2f iQ 2 3 0 114 481 5 P hcd 4-'ccmc 494 Flml lC'mcleC 72 8 1111 If?!I>J Nm Osrarl3a 41 7 Nd dnm3MNcr Mmec 2 39 12 64U 90 Nol delndaa FM M a s o N?t onecrac C 31 l lHUV313 hot dcleded 308 8 21 1 I G P n1 &4 1 379 i15 Nd d9rccu IKI hl.9 rlclecflc 391 1111v,~m3 n 4 ~ . r t r * ~ 4 5 7 t m r 7d r GS 257 023 7.19 1101 ee!.c~ 2-i 3 Nn d ? - ~ = - c 127 ~ i v h ? ~ 0 3 rrw *.wee 51 5 Ci i r our 3c s i 75 E 38 :W wd ce'-r: 2c z k a ae1.a- 133

llff8/2#3 1 3 5 7 0.32 (186 41.6 2.6 6.81 IMNotdotsEl 2 " 1 6 ~ t d a t c c l 131 I t 1 Il'?tuJ3 H a & ~ m c b 373 M d l l M P ( I 04 84 1 1 18 6 7 9 ?XI N d d e l ~ d s f 17 5 Nbl dslccha~ 1CO (t!/19'70W Ndleradaa 15 4 52 9 z l o S 4 4 1 I 7 4 Nc4 dalnclsa IT? Mnl eelecm 5og O I I M M Nol detacrw 2- 5 0 67 M -4 1 52 NU daman 0 5 7 Nu aermce W OMoclac t4U dele l f f 4 p l

O W b ? W N d l e W a c MS 1M 143 16s 4P4 5 3 32 Na We*errcc 33 8 M a set-o-a 4R 2 021~1;'33d N d i l ~ l r l ~ 4 0 1 a? 2 24 2 51 2 43 5 6 F5 Hd o-lp?lw 28 U d c~4cdpa 8: 9 uL!~s ' .Nw N a a e l ~ r a a a2 082 071 m3 032 8 1 272 NM Eeleclac 10 4 NM aeictiau 1W

02/09/2004 Not doted 31 0.71 0.42 la2 0.35 8.3 224 Not J c t o b 0 53 Notdatecl 778 OI :oSr . WM N d d e r m a ~ a m a$ 011 E n 5 l M C B ?RD NM Qtt~c lcc ;6 9 NU .'ereicC "a bL"3rWd NmdefrclsC 10 5 575 11 5 2 3 32 4 4 ZX MU dr'Mm 212 NM d ~ t - 7 ~ e L?U &?;"*A Nddetrdw 30 I Nmd.tlrreo NmdnsUS 1 2 0 4 fi I? Nn' O-'-CIK 236 N m o e l ~ l e c 7 19 ur :ar>031 M a rtaarlnt 31 3 1 16 258 1 .68 6- 52 61 Nw s<~rscIw 51.E Nm utfctfaa BJ 9 w120~?al1 ~ a d m c d m 32 1 c BE nw 4 0 5 0 36 5 5 132 n c ~ aetmclvl 21 1 F l u d ? r ~ ~ r m 172 W7um/ur Nadct -ear 23 9 M w e c 1 15 So b r&l a u m c t c ~ 5 7 311 Ficl o~teclp: 18 PJU dP'~.fer 312

0470R004 1.47 42.7 HotaMect 024 200 N o t ~ w c ! 6.6 353 Not aerca fO.3 Hnt dettcr 1H m=.'YA MdCsctsd 29 3 W d a e l r c l m a N o t ~ ~ ~ 182 tmWtee?c 7 I 1 9 N?' d * e * e ~ 6 52 No1 d ~ l l ~ l l l 244 (rb'2'?'?311 Nc4 de'odw hkl *tar 1 35 a r J tO TdR 5:7 C3 Mp! dclected M 7 Nu aml?=fea 87 2 tGl?W>Wd Hot Ueoc1cE N ~ d 6 I r c l s r E 5 7 ' 1 8 83 4 3T 8 3E! 2.8 N.1 I*larlaa 231 M e ac,ecte 4W OhlLYAh4 M Q a s c l r C ~ C T ~ K N O I ~ ~ ~ N ~ ~ ~ ( ~ I I Nm Emodor nDB 11 IV31 delecthe M-WNci a r e ~ l a 5 a1 fi,%tJ4 M d p l e u a ~ rn wraa: u $7 o sa 74 z Nm amneb 3 BI 1 w a ?? 3 Ncl d r e c l a 120 '?~'3';l)(rd MX o r r ~ l ~ c MM #-lw NU anmclw 0 BZ IZB VUI le tar lm 6 5 ?Zi Not lrl?ctcc 15 1 No! orv~cleo 2rB

B6129'2004 128 N D ~ htod Not dotoe 0.41 12fi 0 32 6.83 30s Not delerl 1DA N d + t~ t l 2 0 5 T b 7 ' 4 f Z W NR aMe&o NMUeieclacNol dwcatlc P t5 127 r 5A 7 25 323 W M ~ I P ~ I R P R 54 NJI a e e c M 7M fJd21,LDM H a d.lac1r~ 593 5 5 - 873 2 61 23 B 4 0 7 ;Jt3 Wm m~csC 201 I.m 0.rc~:se 411 W L l ~ 7 7 U H d M e C e r : I " 20' 7 239 32fl 4 8 '%a n*cc!crea 1'0 Not orr~ctrc l @ u*::~:c~u wot &lsr'cc F ~ R 8 dl 12 269 31 3 91 260 Not opt-aao 2233 NM oetRn+a 4 9 C"d?1?7rTYI Uol e l e e e e 24 0 6 06 G U F k l U 5 6 215 NM dc[efl%o 15 R hlrt detected 151

09121rzOo4 1.61 ~2 ~ o t 021 172 0.37 k s a a73 NOI rlmmci 4.65 Not deltcr 191 VYCI IZOC~~ i 74 5 4 3 h ~ l msts 053 im OZD 821 332 NGI aettclsr: l a i rrai m : c ~ z c 1 s ~ l ~ l X 1 4 1 G1 252 ha(dnrr t~b~Ya&.a 123 11e; 0 3 33r Prm >crr:toc 323 I J o l wrsoec 158

I Tall# dl- Total smr Zlnc -1 WIWdrlcctec lsm

SO Ac4dddmE 7F2 X14 5 3% ZSB 2 3 103 359 $ 8 371

880 27 J5 l a1 J B 142 I Y ~ J tw mmclea 7 ~ 5

835 2 21.8 m3 2 9 1 6 462 7 8 'X7 214 2 3 158

M> S Hol d. lmM 1320 651 N d d s f a m 54 2 1 x 9 2 F d A6 2 3 5 1 48' W W w Z a t I140 21 5 2 5 21 1 31 2 4 33 8

331 3 44.6 4% 25 I 8 7 3!5 Sbl- 1014

:n ~ 3 t ( letwao ~d wctd 87 9 4 1w l+O w- I* 455 trat6ccsaac 3 3 1 4 ~ r 2 1 6 4 d U ' 1 541

Page I

TopoZone - The Web's Topographic Map Page 1 of 1

Map center is 34O 28' 33"'N, 9 2 O 57' 47"W (WGS84jNAD83) Lake Catherine quadrangle

Projection is UTM Zone 15 NAD83 Datum

TopoZone - The Web's Topographic Map

Map center is 34O 28' 26"N, 9 2 O 57' 42"W (WGS84/NAD83) Lake Catherine quadrangle

Projection is UTM Zone 15 NAD83 Datum

Page I

TopoZone - The Web's Topographic Map Page 1 of 1

Map center is 3 4 O 28' 19"M, 92° 57' 50"W (WGS84/NAD83) Lake Catherine quadrangle

Projection is UTM Zone 15 NAD83 Datum