OSWE R/ OSRT I

Washi ngton, DC 2 04 60



## N ATION AL 

## P RIORITIES 

## L IS T 

## (NPL)

***Final Site*** Dec em ber 2013



### KEY STO NE CO RR IDOR GRO UND

WATER CONT AM I NA TI ON I nd ianapol is , I nd iana

Marion Co un ty

 **Site Lo**  **cat ion:** 

Th e Keyst on e Corridor Ground Wa ter Conta mi na ti on site is a chlorinated s ol vent pl ume lo ca ted in I nd iana polis

, In di ana.

 **Site Hi**  **st or**  **y:**

Inve stig ations by Indiana Dep artm ent of Environmental Management cou ld not det er mine an y one sp ec if ic sou rc e or

sou rce s of conta min a tion due to the complex geology and th e number of potential sou rce s. Fort y known users or

handl er s of solv ents ha ve b ee n id entified as possible sou rce s. Individual plumes are c omin gled and ca nnot be

distin guished a mo ng conta min ants or so rted for a tt ribution due to the c ompl ex geology.

 **Site Con**  **ta min**  **atio n/Con**  **ta min**  **ants:**

Th e gr oun d water plu me c on sis ts of chlor in ated solven ts

, in cluding tetrachloroethene ( PC E) , tric hl or oethene (T CE)

, cis-1 ,2 -dichloroethene (cis-1,2-DCE) and vinyl chl or ide.

 **Potential Im**  **p ac**  **ts on**  **S urrounding Communi**  **ty/Env iron**  **ment:**

Five munic ip al we lls have had histo ri ca l detections of vola tile organic compounds ( VO Cs). In one of the five we lls,
vinyl chloride has been det ec ted above its Sa fe Drinking Water Act Max imum Conta min ant Level (MCL). Ov er 13,844 people use the drinking water fr om th e se five we lls. The lo ca l water company continues to monitor and ble nd

the water b ef ore distributing to the public.

 **R es**  **pon se Activities**  **(t o d**  **ate):**

Th er e is an ongoing removal ac tion at Tu chman Cl ea n er s, a nearb y former industrial dr y cl ea ning fac ili ty. Approximatel y 2 9,850,000 ga ll ons of water w er e pumped and treated fr om the conta min ated aquifer fr om De ce mb er

1995 to December 2002 at Tu chman Cl ea n er s. One munic ip al we ll has b ee n taken out of produc tion due to i ts

prox im it y to the pa th of the plume. The EPA is insta lling vapor miti ga ti on syste ms at re sid ential prop erti es th at ar e

above scr ee ning leve ls.

 **N ee**  **d f**  **or NP**  **L Li sti**  **ng:**

The site poses a r isk to the communit y due to ac tu al and potential conta min a tion in munic ip al we lls and in sev eral

monito ring we lls. NPL listing would a llow for proper and tim el y in ve sti ga tion of the na tu re and extent of the

conta min a tion of th e po tential sou rce s, and enabl e the E PA to det er mine cl ea nup a lt er na tiv es in order to prot ec t huma n

h ea lth and th e environment. Oth er fe d era l and sta te cleanup prog ra ms wer e eva lu ated, but ar e not via ble at this tim e

. The st a te ha s p rovided a le tt er of suppor t for listin g.

[The descrip ti on of the s ite (r ele as e) is ba s ed on informa ti on ava il ab le at the time the s it e was ev al ua ted wi th the HRS. The descrip ti on m ay

c hang e as a dd iti ona l informa ti o n is ga ther ed on the s ou r ces an d exte nt of c on ta mi na ti on. S ee 56 FR 5 60 0, Feb ru ar y 11, 19 91, or s ub se qu en t

FR no tice s.]

Fo r mo re infor ma ti on about the haza r dou s s ub st an ce s iden ti f ie d in th is narra ti ve summary, incl ud in g ge neral informa ti on r ega rding the effec ts of ex po sure to

the se s ub st an ce s on human h ea lt h, pl ea se see the A ge ncy for Tox ic Sub st an ce s and Dis ea se R eg ist ry (ATS DR) ToxFA Qs. ATS DR To xF AQs ca n be f ou nd on

th e I nternet a t http:/ /ww w .a ts d r.cdc.gov /t oxfaq s/i nd ex .a sp or by tele ph on e at 1-888-42-ATS DR or 1- 88 8-4 22 -87 37.