General Information

Site Name and Location:		Fast One Hour Cleaners Salina, Kansas, United States
Description: Historical activity that resulted in contamination.		Between 1991 and 1992, KDHE conducted an Expanded Site Investigation (ESI) of the Salina PWS Wells Site. The purpose was to evaluate the Salina PWS Wells Site as a candidate for the National Priority List. In November of 1991, KDHE collected soil gas and groundwater samples at the Former One Hour Martinizing Site. The ESI concluded PCE contamination detected in the PWS wells was most likely a result of impropert storage or disposal of PCE-containing waste solvents at the Former One Hour Martinizing. An Expanded Site Assessment was conducted during the summer of 1998 to determine the boundaries of the comingled plume from the Former Fast One Hour / Former One Hour Martinizing sites.

Contaminants:

Contaminants: Contaminants present and the highest amount detected in both soil and groundwater (please avoid giving ranges).		Contaminant Conc in GW Conc. in Soil cis-1,2-Dichloroethene 2.4 ug/L Tetrachloroethene (PCE) 556 ug/L 2,240 ug/kg Trichloroethene (TCE) 9.04 ug/L
Other Contaminants Present: Indicates what other contaminants were found on-site
Deepest Significant Groundwater Contamination:		68 feet bgs
Plume Size:		3500 ft long x 400ft wide x 30ft saturated thickness

Site Hydrology:

Depth to Groundwater:		35
Lithology and Subsurface Geology:		0-4.5 light brown-gray silty clay 4.5-5.5 brown silt w/ trace of clay 5.5-9.5 yellow-brown silt with some clay and trace of fine sand 9.5-15.5 very dark gray-brown clay with some silt 15.5-18.5 light yellow-brown very fine sand 18.5-21.5 light yellow-brown fine sand with red mottling 21.5-23.5 light yellow-brown with some medium sand and some black clay balls (~1 inch diameter) 23.5-25 brown-yellow medium sand with some coarse fraction. 25-32 clay, Relatively uniform 32-65, medium/coarse-grained sand layer mixed with some gravel
Conductivity:		.00035 ft/day
Gradient:		.002

Pathways and DNAPL Presence:

Pathways:		None Specified
DNAPL Presence:		No

Remediation Scenario:

Cleanup Goals:

Reduce PCE groundwater contamination to below federal Safe Drinking Water Act Maximum Contaminant Level (MCL) of 5 ppm. Reduce soil contamination in accordance with KDHE Risk-Based Standards

Technologies:

Technologies Used:		In Situ: Soil Vapor Extraction
Other technologies used:
Why the technology was selected:		Factors that influenced KDHE's selection of SVE include: cost, effectiveness of the technology, and expected duration of cleanup. Soil conductivity probes indicated soil was conducive to SVE, which led KDHE to select the SVE system.
Date implemented:		April 10, 1998.
Final remediation design:		Four SVE wells were installed at the Former Fast One Hour site. One shallow-deep set was installed south of the building. The second shallow-deep pair was installed west of the building approximately 15 feet west of the boiler unit. The SVE wells were bored with an 8.5 inch hollow stem auger to a depth of 20 feet for the shallow wells and 25 feet for the deeper wells. Wells were completed with 4 inch ID schedule 40 PVC screen and casing. 10 feet of 0.010 inch machine slotted screen were utilized with a 10-20 grade filter pack. A 'T' fitting was installed in-line to connect the SVE wells to the associated piping. The wells were finished with a water-tight, self-sealing J-plug. The well heads were completed with an 8-inch diameter flush-mount protective cover set in a 2 foot by 2 foot concrete pad. The subsurface piping consists of 2 inch ID schedule 40 PVC. Flexible tubing connects the PVC risers to the header system. The venting blower is a EG&G Rotron Model DR454R72 SVE blower with a design capacity of 90 CFM at 30 inches of water vacuum. The blower is powered by a 1.5 horsepower, 460 volt, 3-phase motor. All system components are lag bolted to the wall/floor of a 8 foot by 8 foot remediation enclosure shed. The shed contains a small electric heater to prevent the knockout tank from freezing during winter and a ceiling-mounted exhaust fan to prevent excessive heat buildup in the summer.

Results and Next Steps:

Results to date:		The SVE system achieved cleanup goals to remediate the source area. The system was started in April of 1998 and high concentrations of 893 ppmv were detected by field sampling with a Photoionization detector. Recent field and laboratory sampling has indicated non-detect concentrations and the system was shut-down in June of 2001. During its operation of just over three years, the SVE system removed a total of 334 pounds of VOCs, with 80% of this amount being removed in the first year of operation.
Next Steps:		The groundwater concentrations of PCE has increased slightly since the system was shut down in June 2001. Most recent groundwater sampling event in January 2006 results indicated a PCE concentration of 40 ug/L. KDHE interprets the increase in groundwater PCE concentrations as migration of the plume from the upgradient One Hour Martinizing site. The site will remain in long-term monitoring unless concentrations indicate the need for re-installation of a remedial system. The SVE wells and piping remain at the site.

Costs:

Cost for Assessment:		$8,770
Cost to Design and Implement:		approx. $20,000
Cost for Operation and Maintenance:		$10,000
Total Costs for Cleanup:		$38,770

Lessons Learned:

Lessons Learned:

To protect the City of Salina's PWS wells from further contamination and to allow use of PWS wells currently out-of-service due to contaminant levels, the KDHE Drycleaning Trust Fund and Underground Storage Tank (UST) Trust Fund installed a dual, packed tower air-stripper remediation system at the City of Salina water treatment plant. KDHE's Drycleaning Trust Fund and UST Trust Fund split the cost of the remedial system based on contamination caused by facilities covered under both Funds.

Contacts:

Principal Point of Contact:

Joseph Dom Project Manager / Environmental Scientist 1000 SW Jackson, Suite 410 Topeka, KS 66612 o (785) 296-4367 f (785) 296-4823 jdom@kdhe.state.ks.us

Site Specific References:

Site Specific References: