Transcript
Page 1: Endangerment Assessment IntroductionEndangerment Assessment Introduction The Endanoerment Assessment W QJ prepared in support of litigation concerning the Arkwood, Inc. site. The goal

E n d a n g e r m e n t A s s e s s m e n tI n t r o d u c t i o n

T h e E n d a n o e r m e n t A s s e s s m e n t W Q J p r e p a r e d i n s u p p o r t o f l i t i g a t i o nconcerning t h e A r k w o o d , I n c . s i t e . T h e goa l o f t h e l e g a l a c t i on i s t oo b t a i n a n order r e s t r a i n i n g t h e l a n d o w n e r f r o m c o n d u c t i n g a n y a c t i v i t i e s o ns i t e ( e . g . p l o w i n g ) w h i c h m a y i n t e r f e r e w i t h s i t e r e m e d i a t i o n o r r e s u l t i nincrea s ed p o t e n t i a l f o r e n d a n g e r m e n t t o human h e a l t h o r w e l f a r e o r t h ee n v i r o n m e n t . T h e f o l l o w i n g d i s c u s s i o n w i l l e v a l u a t e :1 . T h e p o t e n t i a l f o r e n d a n g e r m e n t po s ed b y e x i s t i n g s i t e c o n d i t i o n s2 . T h e a d d i t i o n a l h a z a r d s w h i c h m a y r e s u l t f r o m p l o w i n g t h e s o i l s a ttne s i t e .

S i t e a n d W a s t e C h a r a c t e r i z a t i o n

H i s A r k w o o d , I n c . , c o m p r i s e s a p p r o x i m a t e l y 2 0 acres a d j a c e n t t o t h e"1 - P a c i f i c Cr i ck e t r a i l r o a d . The s i t e , l o c a t e d south of Omaha inC o u n t y , A r k a n s a s ( F i g u r e 1 ) , o p e r a t e d a s a c o m m e r c i a l wood p r e s e r v i n gf a - r i l i t y f r o m t h e e a r l y 1960s u n t i l 1984. Both p e n t a c h l o r o p h e n o l ( P C P ) a n dcreo so t e were used as wood p r e s e r v a t i v e s . T h e s e c h e m i c a l s were mixed w i t ht o a d o i l o r d i e s e l f u e l b e f o r e a p p l i c a t i o n t o t h e wood p r o d u c t s .C r e o s o t e i s l a r g e l y c o m p r i s e d o f a g r o u p o f c h e m i c a l s known a sP o l y c y c l i c A r o m a t i c H y d r o c a r b o n s ( P A H s ) . T h e most commonly o c cur ing P A H si n c l u d e : a n t h r a c e n e , p h e n a n t h r e n e , n a p t h a l e n e , f l o u r a n t h e n e , f l u o r e n e ,a c e n a p h t h e n e , d i p h e n y l o x i d e , m e t h y l n a p h t h a l e n e , x y l e n e , m e t h y l f l u o r e n ea n d c a r b a z o l e . P C P w a s t e s t y p i c a l l y i n c l u d e P C P , t o l u e n e , b enz ene , e t h y lb enz ene , c h l o r i n a t e d d i b e n z o d i o x i n s a n d d i b e n z o f u r a n s a s w e l l a s numerousp h e n o l ics.C o n t a m i n a t i o n o f th e s i t e by th e w o o d - t r e a t i n g wastes occurred Ins evera l ways. S o m e was t e s were d i s p o s e d o f by d u m p i n g them i n t o an o n - s i t es i n k h o l e ( s u b s u r f a c e s o l u t i o n f e a t u r e ) o r a p i t l o c a t e d a d j a c e n t t o t h er a i l r o a d . O i l y water produc ed by w a s h i n g the treatment area was spread overt h e s i t e f o r d u s t c o n t r o l . W a s t e p r e s e r v a t i v e s d r i p p e d o f f t r e a t e d woodp r o d u c t s a n d c o n t a m i n a t e d d r i p t r a c k s a d j a c e n t t o t h e p r o c e s s area , a s w e l las the wood s t o r a g e area. W a s t e s were a l s o burned o n - s i t e and d i s p o s e d o fIn what i s now an ash p i l e . The a p p r o x i m a t e l o c a t i o n s o f these waste areasar e i n d i c a t e d in F i g u r e 2 .The most h i g h l y contaminated areas i d e n t i f i e d t o d a t e a r e t h e r a i l r o a dd i t c h a n d s i n k h o l e ( s e e a t t a c h m e n t 1 f o r a n a l y s e s ) . S o i l s a m p l e s f r o m t h ed i t c h c o n t a i n u p t o 50,000 p a r t s p e r m i l l i o n ( p p m ) P C P , 4000 p p m P A H s i n -c l u d i n g f l u o r a n t h e n e , f l u o r e n e a n d a c e n a p t h e n e , l o w l e v e l s o f v o l a t i l ep r i o r i t y p o l l u t a n t s and hexa and h e p t a - c h l o r i n a t e d d i b e n z o d i o x i n s andd i b e n z o f u r a n s . T h e s i n k h o l e c o n t a i n s a p p r o x i m a t e l y f o u r f e e t o f a m u l t i p l e -p h a s e d l i q u i d , c o n t a i n i n g h i g h c o n c e n t r a t i o n s o f benzene, e t h y l b enz ene ,n a p t h a l e n e , n i t r o s o d i p h e y n l a m i n e , t o l u e n e , a s w e l l a s c h l o r i n a t e d d i b e n z o -d i o x i n s a n d f u r a n s .

Page 2: Endangerment Assessment IntroductionEndangerment Assessment Introduction The Endanoerment Assessment W QJ prepared in support of litigation concerning the Arkwood, Inc. site. The goal

F a c t o r s A f f e c t i n g M i r a t i o nThe s i t e i s l o c a t e d i . i d i e x c a v a t e d , f l a t area a t th e head o f a v a l l e y .S u r f a c e d r a i n a g e i s p r i m a r i l y t o t h e n o r t h w e s t v i a a t r i b u t a r y Q * C r i c k e tC r e e k which f l o w s a l o n g C r i c k e t R o a d . C r i c k e t C r e e k i s l e s s t h a n o n e m i l ef r o m the s i t e and f l o w s toward the w e s t - n o r t h w e s t . Some s i t e d r a i n a g e maya l s o f l o w a l o n g t h e r a i l r o a d t o w a r d s W a l n u t C r e e k w h i c h i s about 3 / 4 o f an p l e s o u t h e a s t o f t h e s i t e a n d f l o w s t o t h e s o u t h e a s t . T h e i n v e s t i g a t i o n sp l a n n e d a s p a r t o f t h e R l / F S w i l l i n c l u d e s u r v e y i n g t o c l e a r l y e s t a b l i s hd r a i n a g e d i v i d e s a s w e l l a s s a m p l i n g t o e v a l u a t e a n y i m p a c t o n s u r f a c ewat e r q u a l i t y .The s i t e i s u n d e r l a i n by 0-30 f e e t of a cher t-r i ch c l a y r e s i d u u m( u n c o n s o l i d a t e d d e p o s i t d e r i v e d b y w e a t h e r i n g ) . T h e f o r m a t i o n s b e n e a t ht h e r e s i d u u m a r e p r e d o m i n a n t l y l i m e s t o n e s a n d d o l o m i t e s . A g e n e r a l i z e dn y d r o g e o l o g i c c ro s s - s e c t i on i s pr e s en t ed in F i g u r e 3 . The C h a t t a n o o g as h a l e « a y a c t a s a n a q u i c l u d e b e n e a t h t h e s i t e , r e s t r i c t i n g f l o w i n t o d e e pa q u i f e r s . H o w e v e r , t h i s f o r m a t i o n w a s n o t i d e n t i f i e d * n a d r i d h o l o s e v e r a lt h o u s a n d f e e t f r o m t h e s i t e a n d i f i t i s f o u n d b e n e a t h t h e s i t e i t w i l ll i k e l y b e h i g h l y f r a c t u r e d . H o s t l o c a l w e l l s p u m p f r o m t h e P o w e l l - C o t t e rf o r m a t i o n s . H o w e v e r , m u n i c i p a l a n d i n d u s t r i a l w e l i s g e n e r a l l y t a p t h e d e e p e rR o u b i d o u * a n d G a s c o n a d e V a n Buren f o r m a t i o n s b ecause t h e P o w e l l - C o t t e rd o l o m i t e s a r e t o o l o w - y i e l d i n g f o r t h e e n v e l o p m e n t o f l a r g e w a t e r s u p p l i e s .T h e ra t e a n d d i r e c t i o n o f g r o u n d w a t e r f l o w i n t h e v i c i n i t y o f t h e s i t ei s e x t r e a e l y d i f f i c u l t t o p r e d i c t because t h e f a c i l i t y i sl o c a t e d in kar s t t e r r a n e . Karst t e r r a n e s are c h a r a c t e r i z e d by an absenceo f p e r e n n i a l s t r e a m s , s u r f a c e d e p r e s s i o n s , d o l i n e s o r s i n k h o l e s , a n ds p r i n g s . The h y d r o l o g y o f karst areas i s e x t r eme ly c o m p l e x becauseg r o u n d w a t e r occurs l a r g e l y i n s t r u c t u r a l f e a t u r e s such a s j o i n t s a n df r a c t u r e s w h i c h have been e n l a r g e d by d i s s o l v i n g the carbona t e rock( l i m e s t o n e o r d o l o m i t e ) . T h e rate o f g r o u n d w a t e r f l o w i n th e s e s o l u t i o nc h a n n e l s , or c o n d u i t s , may b e e x t r e m e l y h i g h ( i . e . c o m p a r a b l e t o rate s ins u r f a c e w a t e r ) . C o n t a m i n a n t s i n g r o u n d w a t e r f l o w i n g 1 n c o n d u i t s a r e s u b j e c tt o much l e s s a t t e n u a t i o n t h a n those m o v i n g t h r o u g h p o r o u s m e d i a because:1) h i g h e r f l o w rates r e s u l t in l e s s time f or a t t e n u a t i o n t o occur and 2)the g r o u n d w a t e r i s in contact w i t h f e w e r s u r f a c e s wh i ch c o u l d absorb con-t a m i n a n t s . G r o u n d w a t e r i n kar s t r e g i o n s I s n l g h l y v u l r t ~*ble t o c o n t a m i n a t i o ndue to the t y p i c a l l y h i g h groundwater v e l o c i t i e s and 1 » t t enuat ionc a p a c i t i e s o f c o n d u i t f l o w a q u i f e r s . T h e p o t e n t i a l f o g r o u n d w a t e r con-t a m i n a t i o n r e s u l t i n g f r o m t h e A r k w o o d s i t e i s e x t r e m e l y h i g h because was te swere p l a c e d d i r e c t l y i n t o t h e s u b s u r f a c e v i a t h e on-s1te s i n k h o l e .

Page 3: Endangerment Assessment IntroductionEndangerment Assessment Introduction The Endanoerment Assessment W QJ prepared in support of litigation concerning the Arkwood, Inc. site. The goal

D o c u m e n t a t i o n o f R e l e a s e sM a s s M e r c h a n d i s e r s , * ' . ^ ( M M I - a s i t e p o t e n t i a V y r e s p o n s i b l e p a r t y ) h a sc o n d u c t e d i n t e r m i t t e n t water s a m p l i n g o f s e v e r a l w e l l s a n d s p r i n g s I n t h ev i c i n i t y o f t h e s i t e . T h i s s a m p l i n g h a s c l e a r l y i n d i c a t e d c o n t a m i n a t i o n i nC r i c k e t S p f ' i n g w h i c h i s l o c a t e d d o w n g r a d i e n t o f t h e s i t e , a n d about 2000f e e t t o th e n o r t h w e s t . W a t e r emerges f r o m the m o u t h o f a cave, or c u n d u i e( a c r a c t t o r f i s s u r e w h i c h h a s been e n l a r g e d b y d i s s o l u t i o n I n f l o w i n gg r o u n d w a t e r ) a t t h i s l o c a t i o n a n d runs I n t o a d i t c h a l o n g C r i c k e t road.D u r i n g p e r i o d s o f h i g h f l o w , t h i s d i t c h c a n b e a t r i b u t a r y t o C r i c k e t C r e e kS a m p l i n g o f t h e s p r i n g a n d t h e a d j o i n i n g d i t c h i n d i c a t e s t h e p r e s e n c e o f P C P ,t r i c h l o r o e t h y l e n e , t o l u e n e a n d a number o f P A H s ( D a t a s h e e t s a r e f o u n d i nA t t a c h m e n t s 1 a n d 2 ) . T h e s e d a t a a l s o i n d i c a t e t h a t s ev e ra l p r i v a t e wa t e rs u p p l y w e l l s near C r i c k e t S p r i n g c o n t a i n e d l o w l e v e l s o f c o n t a m i n a n t s w h i c ha r e n o r m a l l y a s s o c i a t e d w i t h wood p r e s e r v i n g s i t e s . T w o o f t h e s e w e l l s havebeen r e p l a c e d b v M M I .T h e p r o x i m i t y o f C r i c k e t S p r i n g t o t h e s i t e a s w e l l a s t h e s i m i l a r i t yo f t h e o f f - s i t e p o l l u t a n t s t o t ho s e f o u n d o n t h e A r k w o o d s i t e s t r o n g l ys u g g e s t t h a t t h e P C P a n d cr eo so t e wa s t e s g e n e r a t e d a t A r k w o o d , I n c . , haver e s u l t e d i n t h e c o n t a m i n a t i o n o f o f f - s i t e g r o u n d w a t e r a n d s u r f a c e w a t e rl o c a t i o n s ,

T o x i c o l o g i c a l P r o p e r t i e sT h e t o x i c o l o g i c a l p r o p e r t i e s o f t h e t h r e e m a j o r c h e m i c a l s , o r g r o u p sof c h e m i c a l s , p r e s e n t at the s i t e have been s u m m a r i z e d 1n the do cumente n t i t l e d C h e m i c a l , P h y s i c a l a n d B i o l o g i c a l P r o p e r t i e s o f _ C o m p o u n d s P r e s e n ta t X a z a r d o u s H a s t e S i t e s ( E P A , T 9 8 & ) . T h e f o l l o w i n g w a s a b s t r a c t e d "fromt h i s source:

1 . P e n t a c h l o r o p h e n o l ( P C P )S t u d i e s have shown that PCP is embryotoxic and f e t o t o x i c . It 1sc u r r e n t l y under e v a l u a t i o n f o r c a r c i n o g e n i c e f f e c t s b y t h e N a t i o n a lT o x i c o l o g y P r o g r a m . C h r o n i c a n d acute e x p o s u r e t o h i g h I t v e l s o f P C Ph a s r e s u l t e d i n f a t a l i t i e s . C h l o r a c n e c o m m o n l y r e s u l t s f r o m chroni chir.ian e x p o s u r e t o P C P , however , 1 t i s n o t known i f t h i s e f f e c t i s causedby PCP or the p o l y e h l o r i n a t e d d l b e n z o d l o x l n s w h i c h are f o u n d as c o n t a m i n a n t si n t e c h n i c a l g r a d e P C P . Other chronic e f f e c t s I n c l u d e h e a d a c h e , m u s c l ew e a k n e s s , a b d o m i n a l p a i n , w e i g h t l o s s a n d l i v e r a n d k i d n e y d a m a g e .L e v e l s o f PCP as low as 0.034 ppm are a c u t e l y t o x i c to f r e s h w a t e ra q u a t i c o r g a n i s m s . P C P p e r s i s t s i n n a t u r a l e n v i r o n m e n t s .

Page 4: Endangerment Assessment IntroductionEndangerment Assessment Introduction The Endanoerment Assessment W QJ prepared in support of litigation concerning the Arkwood, Inc. site. The goal

2 . P o l y c y c l i c A r o m a t i c H y d r o c a r b o n s ( P A H s )Some P A H s a r e c a r c i n o g e n i c a n d m a y r e s u l t i n l o c a l a n d s y s t e m i c e f f e c t s .T e s t a n i m a l s e x p o s e d t o P A H s have d e v e l o p e d tumors o f t h e s k i n , s tomach a n dl u n g s . C a r c i n o y e n . c P A H s a r e a l s o f r e q u e n t l y m u t a g e n i c . T h e n o n - c a r c i n o g e n i ce f f e c t s o f e x p o s u r e t o P A H s i n c l u d e s k i n d i s o r d e r s , i m m u n o s u p p r e s s i o n a n dd i s o r d e r s o f t h e l i v e r a n d k i d n e y s .

3 . P o l y c h l o r i n a t e d d i b e n z o - d i o x i n s ( D i o x i n s )M o s t o f t h e s t u d i e s c . i t h e h e a l t h e f f e c t s o f J i o x i n s c o n c e n t r a t e d o n2, 3 , 7 , 8 - t e t r a c h l o r o d i b e n ^ o - p - d i o x i n . H o w e v e r , a v a i l a b l e s t u d i e s ono t h e r d i o x i n s i n d i c a t e s i m i l i a r r e s u l t s K ; t a t d i f f e r e n t dose l e v e l s .H e a l t h e f f e c t s r e s u l t i n g f r o m e x p o s u r e t o d l o x i n s i n c l u d e cancer, g e n o t o x -i c l t y , enzyme i n d u c t i o n , t e r a t o g e n i c i t y a n d r e p r o d u c t i v e t o x i d t y . " C h l o r -acne i s t h e o n l y e f f e c t o f e x p o s u r e t o d i o x i n d e f i n i t i v e l y i d e n t i f i e d i nh t j s n a n s .F r e s h w a t e r a q u a t i c s p e c i e s d i s p l a y e d a c u t e l y t o x i c e f f e c t s when e x p o s -e d t o l o w l e v e l s ( p a r t s p e r t r i l l i o n ) o f d i o x i n . D i o x i n s a r e p e r s i s t e n tin n a t u r a l e n v i r o n m e n t s and can be b i o a c c u m u l a t e d .I n summary, s t u d i e s o f t h e h e a l t h e f f e c t s o f P C P , P A H s a n d d i o x i n si n d i c a t e t h a t e x p o s u r e t o th e s e s u b s t a n c e s i s a s s o c i s f c e d w i t h numerousc a r c i n o g e n i c a n d n o n - c a r c i n o g e n i c e f f e c t s . T h e s e c o m p o u n d s a r e p e r s i s t e n ti n n a t u r a l e n v i r o n m e n t s . F r e s h w a t e r a q u a t i c o r g a n i s m s e x h i b i t a c u t e l yt o x i c e f f e c t s when e x p o s e d t o l o w l e v e l s o f P C P a n d d i o x i n .

Suawnary a n d C o n c l u s i o n sP r e l i m i n a r y I n v e s t i g a t i o n s o f t h e A r k w o o d , I n c . , w o o d - p r e s e r v i n g s i t ehave i d e n t i f i e d h i g h l e v e l s o f c o n t a m i n a n t s i n s o i l s a n d a s i n k - h o l e oil-s i t e . T h e s e c o n t a m i n a n t s i n c l u d e P C P , P A H s , benzea-*, t o l u e n e * s w e l l a sp o l y c h l o r i n a t e U d i b e n z o d i o x i n s a n d d i b e n z o f u r a n s . E x p o s u r e t o t h e s eh a z a r d o u s s u b s t a n c e s may r e s u l t in numerous c a r c i n o g e n i c and n o n - c a r g i n o g e n i ce f f e c t s ,A r e l ea s e o f h a z a r d o u s sub s tance s f r o m the s i t e has a l r e a d y been• d e n t i f l e d i n t h e g r o u n d w a t e r d i s c h a r g i n g f r o m C r i c k e t S p r i n g . A l t h o u g ht h i s s p r i n g i s no t c u r r e n t l y used for d r i n k i n g water H 1s r e p o r t e d t o havehsen used as a water s u p p l y for a l o c a l r e s i d e n t d u r i n g the e a r l y 1980s.The t o w n s p e o p l e o f Omaha a s w e l l a s r e s i d e n t s o u t s i d e t h e l o c a l waterd i s t r i c t u s* g r o u n d w a t e r a s t h e i r s o l e source o f d r i n k i n g water. Thep o t e n t i a l f o r c o n t a m i n a t i o n o f a d d i t i o n a l g r o u n d w a t e r s u p p l i e s i s s i g n i f i -cant d u e t h e na tur e o f k a r s t , o r c o n d u i t f l o w h y d r o l o g y .

Page 5: Endangerment Assessment IntroductionEndangerment Assessment Introduction The Endanoerment Assessment W QJ prepared in support of litigation concerning the Arkwood, Inc. site. The goal

T h e r e l e a s e o r t h r e a t o f r e l e a s e o f h a z a r d o u s s u b s t a n c e s i d e n t i f i e d a tt h e A r f c w o o d , I n c . , s i t e a n d i n t h e wa t e r s o f C r i c k e t S p r i n g a n d i t s d r a i n a g e ,a s w e l l a s t h e s i g n i f i c a n t p o t e n t i a l f o r c o n t a m i n a t i o n o f l o c a l g r o u n d w a t e rs u p p l i e s r e p r e s e n t a n imminent a n d s u b s t a n t i a l e n d a n g e r m e n t t o p u b l i ch e a l t h o r w e l f a r e o r t h e e n v i r o n m e n t .T h e m i x i n g , o r p l o w i n g o f o n - s i t e s o i l s a n d w a s t e s m a y r e s u l t i ns ev era l s c e n a r i o s t h a t ar e l i k e l y t o i n c r e a s e th e harm or e n d a n g e r m e n tposed by l-.e s i t e . F i r s t , t h e u s e o f m e c h a n i c a l means t o mix c o n t a m i n a t e dm a t e r i a l s a t t h e s i t e w i l l l i k e l y r e s u l t i n t h e e q u i p m e n t o p e r a t o r b e i n ge x p o s e d t o h i g h l e v e l s o f t o x i c c h e m i c a l s e i t h e r b y d i r e c t c on ta c t w i t h t h ew a s t e s o r b y i n h a l a t i o n o f c h e m i c a l f u m e s ( e . g . b enzene a n d t o l u e n e ) r e l e a -s e d f r o m t h e s o i l d u r i n g t h e d i s c i n g . T h e f u m e s v o l a t i l i z e d d u r i n g d i s c i n gm a y a l s o i m p a c t nearby l o c a l r e s i d e n t s . S e c o n d , t h e m i x i n g o f c o n t a m i n a t e ds o i l s w i t h l e s s c o n t a m i n a t e d o r uncontaminated s o i l s would r e s u l t s p r e a d i n gc o n t a m i n a t e d s o i l s over a s i g n i f i c a n t l y l a r g e r area. F i n a l l y , t h e d i s c i n go r p l o w i n g o f t h e s i t e w i l l l i k e l y r e s u l t 1 n s i g n i f i c a n t d e l a y s i n t h e i n -v e s t i g a t i o n a n d e v e n t u a l c l e a n - u p o f t h e s i t e . A l l o y i n g t h e w a s t e s t o r emaino n - s i t e l o n g e r i n c r e a s e s t h e l i k e l i h o o d o f r e l e a s e s t o t h e e n v i r o n m e n t d u et o l e a c n i n y a n d e r o s i o n .

Page 6: Endangerment Assessment IntroductionEndangerment Assessment Introduction The Endanoerment Assessment W QJ prepared in support of litigation concerning the Arkwood, Inc. site. The goal

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Page 13: Endangerment Assessment IntroductionEndangerment Assessment Introduction The Endanoerment Assessment W QJ prepared in support of litigation concerning the Arkwood, Inc. site. The goal

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* A n a l y s i s f o r so i l under wood c h i p p i l e , ( d e p t h o f S a m p l e N o t L i s t e d ) .

3-29

Page 14: Endangerment Assessment IntroductionEndangerment Assessment Introduction The Endanoerment Assessment W QJ prepared in support of litigation concerning the Arkwood, Inc. site. The goal

A n a l y t i c a l Data f o r S a m p l e s C o l l e c t e d b y I T C o r p o r a t i o n~ R I / F S M o r i T P l a nA r k wood I n c . S i t e , Omaha a A r k a n s a sR e s u l t s o f W a t e r A n a l y s i s f o r V o l a t i l e P r i o r i t y P o l l u t a n t sS a m p l i n g P e r f o r m e d : 06-04-85C o n c e n t r a t i o n s 1 n u g / L ( p p b )

• *P a r a m e t e r

A c r o l e i n 'A c r y l o n i t r l l eBenzeneBromoformC a r b o n Tet rachl o r i d eC h l o r o b e n z e n eC h l o r o d l b r o a o m e t h a n eChl oroe thane2-C hi oroet h ^ l v l n y i e th erC h l o r o f o r mD i c h l orobro t t ome thaneDI chl orodi f ul uoromethane1,1-01 chl oroethane1,2-01 chl oroe thane1 ,1-01 chl oroa thyl ene1 , 2 - D U h l o r o p r o p a n e ,-.l , 3 * D 1 c h l o r o p r o p y l e n e * 'Ethyl benzeneM e t h y l b r omideM e t h y l c h l o r i d e 'M e t h y l ene c h l o r i d e1 , 1 , 2 , 2 - T e t rachl oroe thaneTet rachl oroethyl eneT o l u e n et rans-1 f 2-D1 chl oro e thy l enel j l * i - T r i c h l oroethane1 , 1 , 2 - T r i chl oroe thaneTri chl oroet hyl enetri chl orof 1 uoromethaneV i n y l C h l o r i d e

S a m p l i n g P o i n tS i n k h o l e R R tunnel S p r i n g C r i c k e tF l u i d S o u t h S i d e S p r i n g<1000 <10/10 <10<1000 <10/<10 <101,300 <1*0*/<1*0 <1«0<ioo <i.o/<i.o <i,o<100 <1.0/<1.0 <1.0<100 <1«0/<1.0 <1.0<100 <1.0/<1.0 <1.0<1000 <10/<10 <10<1000 <10/<10 <10<100 <1.0/<1.0 <1.0<100 <1.0/<1.0 <1.0<100 <1.0/<1.0 <1.0<100 <1.0/<1.0 <1.0<100 < 1 « 0 / < K O <1.0<100 <1.0/<1.0 <1.0<100 <1,0/<1.0 <1.0<100 <1.0/<1.0 <1.013,000 <1.0/<1.0 <1.0<iooo < io /< io <io<1000 <10/<10 <10<100 <1.0/<1.0 <1«0<100 <1«0/<1.0 <1.0<100 <UO/<1.0 <1.012,000 <1.0/<1.0 4.1<100 <1.U/<1.0 <1.0<1 00 <1, 0/<1. 0 <1, 0360 <1»0/<1>0 <1«0<100 <1<0/<1.0 1.9<100 <1.0/<1.0 <1.0<iooo < io /< io <io

Page 15: Endangerment Assessment IntroductionEndangerment Assessment Introduction The Endanoerment Assessment W QJ prepared in support of litigation concerning the Arkwood, Inc. site. The goal

• A n a l y t i c a l D a t a f r o m S a m p l e s C o l l e c t e d b y I T C o r p o r a t i o nR l / f S W o r k P l a nArkwood I n c . S i t e , Omaha, A r k a n s a si m i i i i i • agg^j ^-Ja*»u^»^M«.apM.fcjjBMM«»M«mJ»«jMiiimaaii»B«MaB»

R e s u l t s o f H a t e r A n a l y s i s F o r V o l a t i l e P r i o r i t y P o l l u t a n t sS a m p l i n g P e r f o r m e d : 06-04-85C o n c e n t r a t i o n s 1 n u g / L ( p p b )

P a r a m e t e rS a m p l i n g P o i n tB i r m i n g h a mN e w W e l l B i d a m W e l l

A c r o l e l n .A e r y l o n l t r i l eBenzeneB r o m o f o r mC a r b o n T e t r a c h l o r i d eC h l o r o b e n z t n eC h l o r o d l b r o m o m e t h a n eC h l o r o e t h a n e2 - C h l o r o c t h y l v i n y l e th erC h l o r o f o r mO l c h l o r o b r o f f l o m e t h a n eD l c h l o r o d l f u l u o r o r a e t h a n e1.1-01 chl orce thane1.2-01 C h l o r o e t h a n e1.1-01 chl oroethyl ene1.2-01chl o r o p r o p & n e / 3 v1 . 3 - D 1 c h l o r o p r o p y l tn e 1 'E thyl benzeneM e t h y l b romideM e t h y l c h l o r i d eM e t h y l ene c h l o r i d e1 , 1 , 2 , 2 - T e t r a c h l o r o e t h a n eT e t r a c M oroethyl eneTol uenet rans-1 ,2-01ch loro e thy l ene" i , l - l - T r 1 c h l o r o * t h a n eI ( l t 2 - T r 1 C h l o r o e t h a n e" T r i c h l o r o e t h y l e n eT r i c h l o r o f 1 u o r o r a e t h a n eV i n y l C h l o r i d e

<LO<i!o

2.1

7.6U.O 7.8

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Page 16: Endangerment Assessment IntroductionEndangerment Assessment Introduction The Endanoerment Assessment W QJ prepared in support of litigation concerning the Arkwood, Inc. site. The goal

A n a l y t i c a l D a t a f o r S a m p l e s C o l l e c t e d b y I T C o r p o r a t i o n• R J / F S H o r l c P l a n !Artwood I n c . s i t e , _ Q n a h a , A r k a n s a sR e s u l t s o f S o i l a n d S l u d g e A n a l y s i s f o r B a s e - N e u t r a lE x t r a c t a b l e P r i o r i t y P o l l u t a n t sS a m p l i n g P e r f o r m e d ; 0 6 / 0 4 / 8 5C o n c e n t r a t i o n s I n u g / g m ( p p m )

*

P a r a m e t e rH e x a c h l o r o b u t a d l t n eN e x a c h l orocycl o p e n t a d l eneH e x a c h l o r o e t h a n eI n d e n o ( l , 2 , 3 - c d ) p y r e n eIs op ho roneN a p t h a l e n eN i t r o b e n z e n e ' .N-Wt r o s o d l m e t h y l ami neN - N 1 t r o s o d 1 - n - p r o p y l arointN - N l t r o s o d 1 p h e n y l a m 1 n e( D l p h e n y l a m l n e ) 1 * 'Phenanthren*P y r t n el , 2 , 4 - T r 1 c h l o r o b e n 2 e n e2 , 3 , 7 , 8 - T e t r a c h l o r o d l b e n z O "p - d 1 o x 1 n

W o o d C h i pP i l e *<0.10<0,10<0.10<0.10<0,40<0.10<0,10<0.10<0.iO<0,10<0.10<o,io<0.10<0.10

S a m p l i n gRR D i t c hD i s p o s a l AreaC e n t e r<50<50<50<50<200930<50<50<50<50<50<50<60<50

PointRR DitchD i s p o s a l AreaEast Ed oe<50/<50<5D/<50<50/<50<50/<50<200/<200<50/<50<50/<50< 5 0 / < S O<50/<50<50/<50

3600/3100<50/<50<50/<50<50/<50

S i n k h o l eF l u i d<SO<50<60<50<2001100<50<50<501000

2000<50<SO<50

* A n a l y s i s f o r s o i l u n d e r wood c h i p p i l e , d e p t h n o t l i s t e d .

2-33

Page 17: Endangerment Assessment IntroductionEndangerment Assessment Introduction The Endanoerment Assessment W QJ prepared in support of litigation concerning the Arkwood, Inc. site. The goal

A n a l y t i c a l D a t a f o r S a m p l e s C o l l e c t e d b y I T C o r p o r a t i o nA r t wood I n c . S i t e , maha , A r k a n s a s

R e s u l t s o f S o i l a n d S l u d g e A n a l y s i s f o r B a s e - N e u t r a lE x t r a e t a b l e P r i o r i t y P o l l u t a n t sS a m p l i n g P e r f o r m e d : 06-04-85C o n c e n t r a t i o n s 1 n u g / g m ( p p m )Samp.l 1 ng P o i n t

W o o d C h i pP a r a m e t e r P i l e *A c e n a p h t h e n eA c e n a p h t h y l e n eA n t h r a c e n ef i e n z l d l n eB e w o f a i a n t h r a c e n eB « n z o ( a ) p y r e n e3 , 4 - B e n z o f l u o r a n t h e n eP e n i o j s . h ,1 ) p e r y l eneB e n x o j k j f l u o r a n t h e n eB i s ? - c h l o r o e t h o x y ) m e t h a n eB 1 s 2 » c h l o r o e t h y l ) e 1 t h e rB i s 2 - e h l o r o s 1 o p r o p y l ) e 1 t h e rB i s ) c h l o r c m e t h y l ) e 1 t h e rB i s 2 - e t h y l h e x y l ) p h t h a l a t e4-Broraophenyl p h e n y l e th erButyl 6 benzyl p h t h a l a t e2 - C h l o r o n a p h t h a l e n e4 - C h l o r o p h e n y l ph eny l e t h e rC h r y s e n eD i b e n z o ( a h ) a n t h r a c e n e1 , 2 - D l c h l o r o b e n z e n e1 , 3-Dichl orobenzene1,4-D1 chl orobentene3 , 3 ' - D i c h l o r o b e n z 1 d 1 n e01 e thyl p h t h a l a t eDimethyl p h t h a l a t eDt-n-butyl p h t h a l a t e2 , 4 - D f n ' t r o t o l u e n e2,6-DI n i t r o t o l u e n eDl-n-octyl p h t h a l a t e1 , 2-01 phenyl hyd r*z 1 ns( A z o b e n z e n e )F l u o r a n t h e n eF l u o n e n eK e x a c h l orobenzene

<CUO<0.iO<0.10<0.40<0.10<0,iO<0.10<0.10< 0 , I O<0.10<0.10<0.10<0.401.3<o.io<0.10<0,10<0.10<0.10<0.10<0.10<0.10<0.10<0.10<0.10<O.IO0.14<0.10<0.10<0.10<0.10<oao<0.10<0.10

RR D i t c h RR D l t C hD i s p o s a l Area D i s p o s a l AreaC e n t e r East E d g e<5066<50<200<50<50<SO<SO<50<60<50<50<200<50<50<50<50<50<50<50<60<50<50<5D<50<50<50<50<50<60<60<50<50<50

170/230<50/<50<50/<50<200/<200<50/<50- <50/<50<50/<50< 5 0 / < S O<50/<50<60/<50<50/<50<50/<50<200/<20C<50/<50<50/<50<50/<50<50/<50<50/<BO<50/<50<60/<50<50/<50<50/<50<50/<50<50/<50< S O / < 5 0<50/<50<50/<50<60/<50<60/<50<50/<50<50/<60680/520840/710<50/<50

S i n k h o l eF u l d s300<SO<50<200<SO<50<50<50<50<50<50<50<200<50<50<5U<50<50<50<SO<50<50<50<50<50<50<50<50<50<50<50370790<50

r-

* A n a l y s i s f o r s o i l u n d e r wood c h i p p i l e , d e p t h n o t l i s t e d .2-32

Page 18: Endangerment Assessment IntroductionEndangerment Assessment Introduction The Endanoerment Assessment W QJ prepared in support of litigation concerning the Arkwood, Inc. site. The goal

A n a l y t i c a l Data f o r S a m p l e s C o l l e c t e d b y I T C o r p o r a t i o n. _ R I / F S W o r k P l a n :

A r t j j f Q Q d _ _ I n c . S i t e , Q n a h a , A r k a n s a sR e s u l t s o f W a t e r A n a l y s i s f o r B a s e - N e u t r a l E x t r a c t a b l e P r i o r i t y P o l l u t a n t sS a m p l i n g P e r f o r m e d ; 06-04-86C o n c e n t r a t i o n s 1 n u g / L ( p p b )* S a m p l i n g Po1;.cRR T u n n e lS p r i n gP a r a m e t e r S o u t h S i d eA c e n a p h t h e r i eA c e n a p h t h y l e n eA n t h r a c e n eB e n z l d l n eB e n z o ( a ) a n t h r a c e n eB e n z o ( a ] p y r e n e3 t 4 * & e n z o f l u o r a n t h e n eB e n z o ( g , h t 1 ) p e r y l e n eB e n x o ( k ) f l u o r a n t h e n eB1 s (2-chl oroethoxy J m e t h a n eB 1 s ( 2 - c h l o r o e t h y l J e t h e rB 1 s ( 2 * c h l o r o s 1 o p r o p y 1 ) e j t h e rB 1 s ( c h l o r < j m e t h y l j e 1 t h e r ' 3 'B1 s (2-ethyl hexyl ) p h t h a l ate4-Brornophenyl p h e n y l e therButyl e benzyl p h t h a l a t e2-Chl o r o n a p h t h a l one4 - C h l o r o p h e n y l p h e n y l e t h e rC h r y s e n e0 1 b e n z o ( a h ) a n t h r a c e n e1,2-01 c h l o r o b e n z e n e1 , 3 - D l c h l o r o b e n z a n e1.4-D1 c h l o r o b e n z e n e3 , 3 ' - D 1 c h l o r o b e n 2 l d 1 n eD1 e thyl p h t h a l a t eDimethyl p h t h a l a t eD l - n - b u t y l p h t h a l a t e2 , 4 - D 1 n 1 t r o t o l u e n e2,6-01 n l t r o t o l u e n aD1-n*octy1 p h t h a l a t e1 , 2-01 phenyl byd razl ne( A z o b e n z e n e ) 1 'H u o r a n t h e n eF l u o r e n eH e x a c h l o r o b e n z e n e

<5.0<5.0<5.0<20<5.0<5.0<5.0<5.0<5.0<5.0<S.O<5.0<5.0<20<5.0<5,0<5.0<5.0<5.0<5.0<5.0<5.0<5.0<5.0<5.0<5.0<5.0<6,o<5.0<5.0<5.0<&.o<5.0<5.0

C r i c k e tS p r i n g<5.0<5.0<5.0 '<20<5.0<5.0<5.0<&.o<5.0<5.0<5.0<ro<5.0<20<5.0<S.O<5.0<5.0<5.0<5.0<5.0<5.0<6.0<5.0<5.0<5.0<5.0<5.0<5.0<5.0<5.0<5,0<5.0<5.0

B i r m i n g h a m B l n a mN e w W e l l W e l l<5.0<5.0<5.0<20<5.0<5.0<5.0<5.0<5.0<5.0<5.0<5.0<5.0<20<5.0<5.0<&.o<5.0<5.0<5.0<5.0<5.0<5.0<5.0<5.0<5.0<5.0<5.0<5.0<6.0<5.0<5.0<5,0<&.o

18/20<5.0/<5.0<5. 0/<5. 0<20/<20<5.0/<5.0<5.0/<5.0< 5 e O / < 5 , 0<5.0/<5,0<5.0/<5.0<5«0/<5,Q<5.0/<5.0<5,0/<5.0<5.0/<5.0<20/<20<5«0/<5.0<6.0/<5.0<5.0/<5.0<5.0/<5.0<5.0/<5.0<5.0/<5.0<5.0/<5.0<5.0/<5.0<5.0/<5 aO<5.0/<5.0<5,0/<5«0< 5 . 0 / < f a . O<5.0/<5.0<5.0/<5.0<5.0/<5.0<5.0/<5.0<5.0/<5.0<5.0/<5.06.3/7.1<5.0/<5.0

2-34