LEA AND WEST SECOND STREET
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The Lea and West Second Street Superfund Site is located in the City of Roswell, Chavez County, New Mexico. The “site” is identified as four locations (Sites 1 through 4) near West Second Street and East Second Street in areas of active commercial and residential use near the center of downtown Roswell. At each of these four sites, historical industrial operations are documented and hazardous substances were released to the soil and migrated to ground water. These releases were predominantly from historical dry cleaning operations and evaluated collectively under the Hazard Ranking System (HRS).
The Lea and West Second Street Superfund Site consists of four sites, where soil and ground water have been impacted by chlorinated solvents to varying degrees. The chlorinated solvents of concern are perchloroethylene (PCE), trichloroethylene (TCE), cis-1,2-dichloroethene (cis-1,2-DCE), and trans-1,2- dichloroethene (trans-1,2-DCE).
Site 1 – 510 and 514 West Second Street: Site 1 is commonly referred to as Denio’s. Contamination is present on the south side of a building which encompasses the stretch between 510 and 514 West Second Street. Ground water contamination was initially discovered in 2006 during a New Mexico Environment Department (NMED) Leaking Underground Storage Tank (LUST) investigations of the Allsup’s 289 and Sawey Gulf Petroleum facilities located downgradient of 510 and 514 West Second Street. The area designated for Site 1 encompasses 156 acres.
Site 2 – 507 East Second Street: Located approximately 0.8 mile east of Site 1, Site 2 contamination is likely the result of leakage from a private sewer line believed to be associated with former dry cleaning operations that historically have been located between 505 and 511 East Second Street. Ground water contamination was initially discovered in private supply wells downgradient of 507 East Second Street. The area designated as Site 2 encompasses 509 acres.
Site 3 – Intersection of West Second and Montana: Site 3 is commonly referred to as West Second and Montana Avenue. The contamination is suspected to have originated within an in-ground separator tank that is associated with drainage of wastes from former dry cleaning operations. Site 3 was discovered by the NMED Superfund Oversight Section (SOS) during a Site Inspection (SI) conducted at the site. Chlorinated solvent contamination was also present in ground water samples from monitoring wells at two adjacent properties on the northeast corner of the intersection of West Second Street and North Montana Avenue. The area designated as Site 3 encompasses 276 acres.
Site 4 – Intersection of South Virginia Avenue and East Alameda Street: Site 4 is commonly referred to as Parks Underground Storage Tank (UST) Site. Ground water contamination was initially discovered during ground water monitoring activities conducted at the Parks Site. No source has been identified for the detected chlorinated solvent ground water plume detected in May 2005. The area designated as Site 4 encompasses 123 acres.
On April 7, 2016, these four grouped sites were added to the National Priorities List as the Lea and West Second Street Superfund NPL site.
RI/FS Process and Ongoing Activities
The first step of the RI/FS process is to have a work plan in place that describes the work to be done. The Remedial Investigation is designed to determine the nature and extent of contamination, and the Feasibility Study evaluates various ways to deal with the contamination at the site. The RI/FS Work Plan and support plans describe sampling activities, the number and type of samples collected, sampling procedures, health and safety precautions, community outreach activities and quality assurance procedures. The RI/FS Work plan was finalized on June 17, 2016.
Later approved support plans included the Sampling and Analysis Plan, Health and Safety Plan and a Site Management Plan.
The Remedial Investigation will begin in early May 2017 with a passive soil gas survey and a vapor intrusion investigation. Passive soil gas is used as a screening tool to determine if dry cleaning solvents used during historical industrial operations have migrated to the surface from the soil or groundwater. Vapor intrusion may occur where source contamination has migrated upwards beneath buildings. To check for vapors beneath buildings and indoors, air testing is performed in addition to conducting sub-slab soil gas or crawl space testing.
What Has Been Done to Clean Up the Site?
The site is currently in the remedial investigation phase and additional details will be provided as data is collected and evaluated.
What Is the Current Site Status?
The site is in the beginning phases of the Remedial Investigation / Feasibility Study process.