Drycleaner Site Profiles

Franklin Cleaners, Hempstead, New York

Description
Historical activity that resulted in contamination.

Franklin Cleaners is the site of a former dry cleaner located in the Village of Hempstead on Long Island in New York. It is listed as a Class 2 Inactive Hazardous Waste Site, which means that a consequential amount of hazardous waste was released that is posing a significant threat to public health or the environment. A dry cleaner operated on this site from 1957 until 1991. The site is approximately 1/8 acre in size and includes a two-story building with residential apartments on the second floor and a coin laundromat and a delicatessan occupying the first floor. The former dry cleaner occupied part of the first floor and the basement. Except for the immediately adjacent properties, the surrounding properties are residential.

Contaminants
Contaminants present and the highest amount detected in both soil and groundwater.


Contaminant Media Concentration (ppb) Nondetect
Tetrachloroethene (PCE) groundwater 1,500 ppb
Tetrachloroethene (PCE) soil 650,000 ppb

Site Hydrology

Deepest Significant Groundwater Contamination:   90ft bgs
Plume Size:   Plume Length: 5,280ft
Plume Width: 300ft
Average Depth to Groundwater:   20ft

Lithology and Subsurface Geology

 
  Fine to coarse sand and gravel with silt and lenses of silty sand. Some silty clay present in thin layers.
Depth: 0-75ft bgs
75ft thick
Gradient: 0.0016ft/ft
 
  significant clay barrier
Depth: 75-95ft bgs
20ft thick

Pathways and DNAPL Presence

checkGroundwater
Sediments
checkSoil
DNAPL Present

Remediation Scenario

Cleanup Goals:
  Reduce, control, or eliminate contaminated media to the extent practicable; eliminate the threat of groundwater and indoor air contamination by eliminating on-site soil contamination; eliminate the potential for human exposure to on-site contaminated soils. Provide for attainment of SCGs to the limits of the affected area to the extent practicable (SCG for PCE in soil, 1.4 mg/kg; PCE in groundwater, 5 µg/L).

Technologies

In Situ Air Sparging
 

Date implemented:
September 2003

Final remediation design:
The final system consists of soil vapor extraction (SVE) of PCE-contaminated soil with on-site treatment of vapors using granular activated carbon (GAC); air sparging of shallow on-site groundwater with teatment of vapors by SVE system; extraction of contaminated groundwater at the leading edge of the plume. A temporary vapor mitigation system was installed to control on-site indoor air contamination using air purifying, ventilation, and vapor barrier systems. This system will be operated until the source area remediation has been effectively completed.

Results to date:
Current groundwater data indicates 120 to 670 ug/L of PCE.

Cost to Design and Implement:
$1,770,000

In Situ Soil Vapor Extraction
 

Date implemented:
September 2003

Final remediation design:
The final system consists of soil vapor extraction (SVE) of PCE-contaminated soil with on-site treatment of vapors using granular activated carbon (GAC); air sparging of shallow on-site groundwater with teatment of vapors by SVE system; extraction of contaminated groundwater at the leading edge of the plume. A temporary vapor mitigation system was installed to control on-site indoor air contamination using air purifying, ventilation, and vapor barrier systems. This system will be operated until the source area remediation has been effectively completed.

Results to date:
Current groundwater data indicates 120 to 670 ug/L of PCE.

Cost to Design and Implement:
$1,770,000

Ex Situ Pump and Treat
 

Date implemented:
September 2003

Final remediation design:
The final system consists of soil vapor extraction (SVE) of PCE-contaminated soil with on-site treatment of vapors using granular activated carbon (GAC); air sparging of shallow on-site groundwater with teatment of vapors by SVE system; extraction of contaminated groundwater at the leading edge of the plume. A temporary vapor mitigation system was installed to control on-site indoor air contamination using air purifying, ventilation, and vapor barrier systems. This system will be operated until the source area remediation has been effectively completed.

Results to date:
Current groundwater data indicates 120 to 670 ug/L of PCE.

Cost to Design and Implement:
$1,770,000

Costs

Cost for Assessment:
  $384,000
Cost for Operation and Maintenance:
  $1,412,000 (present worth at 2o years operation)
Total Costs for Cleanup:
 

Contacts

Jim Harrington
New York Department of Environmental Conservation
11th Floor
625 Broadway
Albany, New York 12233-7012
518-402-9755
518-402-9722 (fax)
jbharrin@gw.dec.state.ny.us

Site Specific References

(available on microfilm only)
1. Preliminary Site Assessment- Mach 1993
2. Remedial Investigation/Feasibility Study Workplan - March 1997
3. Remedial Investigation/Feasibility Study Report - October 1997
4. Proposed Remedial Action Plan - February 1998
5. Record of Decision - March 1998