Documents & Webpages
Maryland Square
February 08 — Background
[3 Pages]
February 08 — FAQs Maryland Square PCE site
July 08 Admin. Record Maryland Square PCE site
May 07 — Sampling Equipment, Mitigation Systems, & Chemical Checklist [6 Pages]
 Reports, Maryland Square PCE Site
PCE Figures
Vapor Intrusion Process [1 Page 4.5MB]
Maryland Square, General Location Map
Maryland Square Plume
Map
Resource Links
September 1997 — Public Health Statement for Tetrachloroethylene [ATSDR]
September 1998 — Subsurface Permeable Reactive Barriers [US EPA]
Remediation Resources
General Reference Documents
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 his webpage provides information about the discovery and subsequent investigation of a hazardous substance tetrachloroethylene [PCE] that was released from the former Al Phillips Cleaners in the Maryland Square Shopping Center at 3661 S. Maryland Parkway. The release site is located just north of the intersection of S. Maryland Parkway and Twain Avenue - Las Vegas Nevada [see photo below]. Analytical data for samples of soil and groundwater collected from the site have confirmed the release – See Location Map.
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Top Photo: 11/03 Maryland Square Shopping Center - Blight Study conducted by the Clark County Redevelopment Agency
Bottom Photo: 6/06 Al Phillips Cleaners building at Maryland Square Shopping Center is demolished.
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Spill Report for Maryland Square PCE Site
The discovery of a discharge of PCE at the former Al Phillips the Cleaners site was first reported on November 29, 2000 via NDEP's spill reporting hotline. The release was discovered during a routine environmental site assessment performed as part of a property transaction. NDEP received the initial environmental report on July 21, 2001. After reviewing the report, NDEP determined that the levels of PCE did not pose an immediate health concern at the site.
Initial Investigations
The dry cleaner at
Maryland Square Shopping Center operated from 1969 through 2000; however, the exact date that the release began is not known. Discharges of PCE by the dry cleaner resulted in soil and groundwater contamination at the site. Continuing investigations conducted since NDEP received the initial environmental report suggest that the PCE contamination has migrated off-site in groundwater, forming what is called a "plume" in the groundwater.
In November 2002, NDEP received a report that indicated that the PCE groundwater plume did not migrate to the southeast from the site as expected. However, NDEP's review of the report suggested that additional investigation directly to the east was needed to determine the extent of the PCE plume in groundwater; accordingly, NDEP requested installation of additional wells.
The investigation proceeded as part of a step-wise process to determine the direction and extent of the PCE plume in groundwater. Additional groundwater monitoring wells installed in 2003 and 2004 failed to find the eastern extent of the plume.
A July 2005 report described the installation of six additional monitoring wells and gave the first indications that the PCE groundwater plume extended under the residential neighborhood. Two more wells were installed further to the east (on Seneca Lane near Spencer Street and at Ottawa Circle) in the neighborhood in April 2006. Information from those investigations indicated the PCE groundwater plume had migrated to the east toward the Boulevard Mall, through the residential area, and to the Las Vegas National Golf Course. Additional re-samplings of wells reported in February, April and July 2006 confirmed the initial findings of a PCE plume underlying the neighborhood and extending east toward the golf course.
Transfer of regulatory oversight to Carson City and Current Status of the Investigation
In September 2006, responsibility for the case was transferred to NDEP's headquarters in Carson City so greater staff resources could be devoted to the case.
 Readers Note: For additional details, see the Maryland Square Administrative Record on this website.
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