OLEM/OSRTI Washington, DC 20460 

## N ATIONAL 

## P RIORITIES 

## L IST 

## (NPL)

*** Proposed Site *** Ap ril 2016 

### VALLEY PIKE VOC s Riverside , Ohio Montgomery County
 **Site Location :**  T he Valley Pike VOC s site, located in Riverside, Ohio , is comprised of ground water and soil contaminated with v olatile
o rganic c ompounds (VOCs) . A residential neighborhood at the s ite has been impacted by vapor intrusion from the
co ntaminated ground water plume. The neighborhood is located approximately 900 feet southwest of the Mullins Rubber Products, Inc. (MRP) facility and includes approximately 500 residences.

 **Site History:** M RP , an active business, began operations in 1942 as Mullins Tire and Rubber Company. The primary operation at that time was retreading used tires. In 1955, the business expanded from tires into mol ding rubber products. Beginning in the mid

- 1960s, the company focused on molding heavy duty truck/trailer suspension bushings, the product line that continues today. As part of MRP’s manufacturing process , VOCs we re used to degrease certain metal parts.
 **Si te Contamination/Contaminants:**  Ground water, soil and indoor air ha ve been contaminated by VOCs, including tetrachloroethylene (PCE) and trichloroethylene (TCE).

 **Potential Impacts on Surrounding Community/Environment :**  Ground water contamination has permeated the Grand Miami Buried Valley (GMBV) aquifer system . T he s ite is located near the Dayton Mad River Well Field to the south, and the D ayton Miami Well Field to the west. Collectively, these well fields provide drinking water for approximately 400,000 residents.  **Response Activities (to date):** Over the last several years, the EPA has coordinated with the Ohio Environmental Protection Agency to investigate and respond to the contamination at the s ite. Results from these investigations indicate that ind oor air at certain residences at the
s ite have been contaminated by VOCs above health

- based screening levels. Approximately 400 residences have been sampled for vapor intrusion (sub

- slab or indoor air) by the EPA’s Superfund Removal Program and 91 residences were found to exceed the Ohio Department of Health screening level

. EPA’s Removal Program has installed vapor abatement mitigation systems at 90 homes to date. In January 2016, MRP agreed to conduct further evaluation and mitigation of residential vapor intrusion and conduct a source removal action.

 **Need for NPL Listing:** This s ite was referred to the EPA by the state due to the VOC plume, potential for contaminated drinking water , and vapor intrusion into residential homes

. Although MRP and the EPA ha ve recently agreed to actions to mitigate vapor intrusion impacts, w ithout remediation of the contaminated ground water plume , the contamination may continue to spread. Other federal and state cleanup programs were evaluated, but are not viable at this tim e. The EPA received a letter of support for placing th e s ite on the NPL from the s tate of Ohio

.

[Th e de scription of t he s ite ( release) i s bas ed on informatio n available at t he t ime t h e s ite w as e valu a ted with the H RS. T he de scription may change as addi tional i nfo rmation is gat hered on the s ources and extent of c ontamination. Se e 5 6 FR 5600, F ebruary 11, 1991, or
s ubsequent FR n o tices.]
For more information about the hazardous substances identified in this narrative summary, including general information regarding the effects of exposure to these substances on human health, please see the Agency for Toxic Substances and Disease Registry (ATSDR) ToxFAQs. ATSDR ToxFAQs ca n 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.