99 -- DESIGN/BUILD/OPERATE AN IN-WELL VAPOR STRIPPING GROUNDWATER REMEDIATION SYSTEM

Notice Date

January 10, 2001

Contracting Office

CDM Federal Programs Corporation, 13135 Lee Jackson Memorial Highway, Suite 200, Fairfax, VA 22033

ZIP Code

22033

Solicitation Number

RFP-3280-096-VAPOR

Point of Contact

Vernon L. Wimberley (703) 968-0900

E-Mail Address

Click here to contact the Subcontracts and Purchasing (wimberleyvl@cdm.com)

Description

CDM Federal Programs Corporation (CDM Federal), working as a Contractor for the U.S. Environmental Protection Agency (EPA), seeks a Subcontractor to respond to a Request for Proposal (RFP) to design/ build/ operate an in-well vapor stripping groundwater remediation system (a.k.a. recirculating well treatment, groundwater circulation, etc.) in Belmont, Gaston County, North Carolina. In 1991, sampling at the Site indicated significant volatile organic compound (VOC) contamination including tetrachloroethene (PCE), trichloroethene (TCE), and cis-1,2-dichloroethene (1,2-DCE). Source areas have been identified as two closed dry cleaning operations, one of which will be the location of the remediation system. The area to be treated is approximately 7.4 acres and is bounded to the east and west by residential neighborhoods, to the north by a cemetery and an undeveloped wooded tract, and to the south by North Belmont Elementary School. The water bearing units that underlie the Site and surrounding areas represent an aquifer system consisting of metamorphosed and fractured quartz diorite and granitic type rocks in varying proportions and thicknesses. The aquifer system underlying the Site generally consists of the saprolite/partially weathered rock aquifer and the underlying bedrock aquifer; however, interconnection between these units is likely, thereby influencing contaminant transport. Average depth to groundwater is approximately 30 feet and contamination extends to approximately 150 feet below ground surface. Measured hydraulic conductivities range from 3.4 to 0.016 feet/day. The major goal of this performance-based design is to address source area and high concentration portions of the groundwater plume within the three aquifer units (saprolitic, top of bedrock and bedrock) within the selected treatment area boundaries. Maximum PCE concentrations within the saprolitic, top of bedrock and bedrock aquifer units are 2,200 ug/L, 2,500 ug/L, and 3,500 ug/L, respectively. The Subcontractor will be required to install, operate, monitor, and maintain an in-well vapor stripping system for a startup and demonstration period following installation and for one year thereafter. The Subcontractor will track the progress of the remediation by collecting and analyzing treatment well groundwater and vapor samples, determining the hydrologic treatment zone in all three aquifer units, and collecting and analyzing monitoring well samples. Attainment of a targeted treatment zone must be demonstrated through water table elevation measurements and tracer testing. The same Subcontractor will also be responsible for abandoning approximately 60 residential drinking water wells. These activities will implement portions of the selected remedy outlined in the Record of Decision (ROD) for the North Belmont PCE Site (EPA, 1997a). The proposed in-well vapor stripping system will use multiple screened treatment wells and in-well stripping to volatilize VOCs contained in groundwater within treatment wells and remove them as vapors from the same well. The vapors will be treated above ground by adsorption onto granular activated carbon (GAC) and the partially cleaned water will return to the aquifer. The system will recirculate the groundwater through air-lift (or other) pumping. The Subcontractor will also be responsible for but not limited to the following: identify and obtain required easements, obtain necessary permits, access requirements, and approvals to perform the work; submittals, as required, including as-built drawings, operation and maintenance (O&M) manuals, health and safety plan, quality assurance project plan, and updates as needed; handle and dispose of all residual wastes, conduct system monitoring, and prepare monitoring reports; and perform groundwater modeling to optimize the location, design, and operational parameters for in-well vapor stripping wells and to minimize the time of groundwater contamination remediation in the saprolite, top of bedrock, and bedrock aquifers. CDM Federal anticipates the award of a contract with a target date for award of May 2001. The anticipated total term of the contract is 2.5 years. CDM Federal currently plans to release a draft RFP in early February 2001, issue a final RFP and hold a pre-proposal conference in Belmont, NC in mid February 2001, and have proposals due in April 2001. Bidders must meet the following minimal requirements: 1) Bidders must be able to provide three recent (within 3 years) client references for which the bidder has performed work similar in nature and magnitude to the system briefly described above, 2) Bidders must have at least three projects for design and operation of in-well vapor stripping systems and the Design Manager shall have at least three years experience in the design and construction of these systems, 3) Bidders shall have at least $1 million in Pollution Liability Insurance. Requests for the RFP should include your complete mailing address, point of contact (name, telephone number, and e-mail address), and reference the solicitation number RFP-3280-096-VAPOR. Mail the request for RFP to CDM Federal Programs Corporation, ATTN: Vernon Wimberley, 13135 Lee Jackson Memorial Highway, Suite 200, Fairfax, VA 22033, Ph.: 703/968-0900. Companies responding to this notice will be placed on a source list, which will be used for further notifications. Questions regarding this notice should be directed to Vernon Wimberley at wimberleyvl@cdm.com.

Record

Loren Data Corp. 20010112/99SOL003.HTM (W-010 SN50A5L3)