OSWER/OSRTI

Washington, DC 20460



## N ATIONAL 

## P RIORITIES 

## L IST 

## (NPL)

***Final Site*** March 2015



### KOKOMO CONTAMINATED K o k o m o , I nd i a n a

GROUND WATER PLUME Howar d County

 **Site Location :** 

The Kok om o Cont am inated Ground W ater Plu m e site i s a conta m inated ground wat e r plu me with no identi fi ed source

loca t ed in the city of Kok omo, H oward County, Ind i ana. The ground water plume is ap p rox im ately 294 acres and

enco mpasses sever a l mu nicip a l wel ls in the c ity

.

 **Site History:**

Site investigations in 2007 con f ir med levels of vinyl chl oride at le v els exceeding the EPA m axi mum contaminant

level (MC L) in raw wa ter at four (4) municipal wel l s. The Indian a Depart m ent of Envir onm ental Manage m ent (IDEM) ha s

iden tif ied f ourteen han dlers of c hlo rin a ted solv ents in the a rea th at co uld be con t ri b uting to the co n ta m inated g rou nd water

plum e. Despite seve r al in v esti g atio ns in the ar e a, the exa ct ori gin of the contaminants is unknown.

 **Site Contamination/Contaminants:**

The plum e consists of ch lori n ated s olvents, specif ica l ly, vinyl chlo ride

.

 **Potential Impacts on Surrounding Community/Environment :** 

Area resi dents are supp lied by mun icip al water supply distribution sys te ms and use m unicipal w ater as the i r drinking water

sou rc e. The a ff ect ed we llfie ld provide s water to approximately 55,000 reside n ts in Kok omo. There are known

contam inat ed residenti al wells which are b e lieved to be used for non-potable purpos es

.

 **Response Activities (to date):**

IDEM has identif ied f ourteen f ac ili ties th at handle chlo r in a ted solven ts and could be sources to the contam ination plu m e.

So me of these potent ial so ur ces are curr ently be ing m anaged un der other authori ti es but there is no cleanup approach

fo cusing on t he ground wa ter p lu m e. W ater f

rom sever al wel l fields in Ko komo are bl ended and tr ea t ed prio r to

distribu ti on. A wat er t re atm ent system has been su cc e ss ful ly re moving the v inyl chlo ride f rom the f inished drinking w ater,

but t his is n o t a p er manent solution to address the contaminated ground water plume.

 **Need for NPL Listing:**

The state of Indiana re f erred the si te to the EPA because the site requ i res a long term response action. L isting on the NPL

wi l l allow for a comprehensive investiga tion of t he nature and extent of conta m ination. Other f

ederal and state cleanup

progra ms w ere eval u at ed but are not viable at this ti m e. The city ’s mayor has expr e ssed support for listing, and t he

EPA receiv e d a le t ter of support from the sta te.

[The description of the site (release) is based on information available at the time the site was evaluated with the HRS. The description may change

as additional information is gathered on the sources and extent of contamination. See 56 FR 5600, February 11, 1991, or subsequent FR no tices.]

For more information about the hazardous substances identified in this narrative summary, including general information regar ding the effects of exposure to these

substances on human health, please see the Agency for Toxic Substances and Disease R egistry (ATSDR) ToxFAQs. ATSDR ToxFAQs can be found on the Internet

at http://www.atsdr.cdc.gov/toxfaqs/index.asp or by telephone at 1

- 888

- 42

- ATSDR or 1

- 888

- 422

- 8737.