CT DEPT. OF TRANSPORTATION
Stamford, CT | 50,000 Square Feet |
The Connecticut Department of Transportation was expanding their transportation facilities onto a site, which contained low levels of various chemicals. The normal procedure for a site with these conditions is to install a gas tight membrane over the sub-grade before pouring the foundation slab. Numerous large pipe penetrations made the installation of a sheet membrane more difficult and costly. In addition there was a significant amount of backfill that was to be placed over the membrane. If a sheet membrane was used this backfill would have to be placed with manual labor, or small equipment, again increasing the cost of the project. O&G Industries, Inc. Gatti & Lopez, Inc. (LIQUID BOOT ® Approved Applicator) and CETCO Remediation Technologies. LIQUID BOOT® was selected as the membrane of choice for the following reasons: It is easily applied around penetrations when applied onto a non-woven geotextile (protected by another layer of non-woven geotextile), heavy equipment can be used on the membrane and LIQUID BOOT® membrane can be installed much quicker than a sheet membrane and at a lower cost.
 
Jersey City, NJ | 100,000 Square Feet |
Since summer of 2004 Edgeboro International has installed over 100,000 ft2 of the LIQUID BOOT® spray-applied gas vapor membrane system at Droyer's Point in Jersey City, NJ. The 23-acre site is being developed by K. Hovnanian Homes and will offer 30, new, three-story townhouse buildings (8-20 units each) all well-situated along the Jersey City shoreline. As a precautionary measure against residual soil vapors on site K. Hovnanian Homes in concert with Environmental Consultant, ENVIRON, designed a comprehensive Vapor Mitigation System (VMS) to be installed beneath each of the building. The VMS includes LIQUID BOOT® impermeable gas vapor membrane and an "active" venting system. The LIQUID BOOT® system was selected because it offers the advantage of being spray-applied, which in turn means a fast installation while readily achieving a vapor-tight seal around the numerous penetrations in the foundation. Once installed, the LIQUID BOOT® membrane is being smoke tested for quality control and to verify its integrity.
 
Oakland, CA | 60,000 Square Feet |
The Port of Oakland retained the services of Treadwell and Rollo to provide environmental engineering services for the Port’s new maintenance storage facility. Due to the separate phase petroleum hydrocarbons found in the groundwater, methane gas was present in the soil. The LIQUID BOOT® gas vapor membrane was installed to prevent methane intrusion into the buildings. With the ability to create the membrane on the field, LIQUID BOOT® sealed around approximately 148 piles over 61,000 square feet. The ability to seal around each pile was crucial for a successful installation.
San Diego, CA | 100,00 Square Feet |
San Diego North County Transit District had entered into escrow to sell a part of its property to a housing developer. Prior to the close of escrow, the developer discovered low levels of hydrocarbons on the site. It was determined that the source of the contamination was an oil and gas storage facility adjacent to the property. Kleinfelder worked closely with the San Diego County Health Department, North County Transit District and developer to develop an extensive mitigation plan. Part of the plan called for a LIQUID BOOT® membrane to be installed under the slab and footings of the new homes to protect the homeowners from possible future migration of hydrocarbons from the adjacent site. The North County Transit District was able to sell the site to the developer who had subsequently constructed an extremely successful tract of single-family homes.
Salem, MA | 33,000 Square Feet |
Over 33,000 square feet of LIQUID BOOT® and 3,000 lineal feet of LIQUID BOOT® GeoVent was installed to prevent petroleum hydrocarbon gas intrusion/migration into the new Public Storage building. ENSR International's environmental assessment of the property determined that the top 6 to 16 feet of soil at the site contained oil and/or hazardous materials (OHM) including metals (primarily arsenic, chromium and lead), and petroleum hydrocarbons. OHM in groundwater include petroleum related VOCs, arsenic, chromium and lead. The OHM detected at the property are believed to be associated with the historic property use as a leather tanning operation from the 1800s until approximately 1957 as well as from urban fill materials. Petroleum was present in the vicinity of a former underground storage tank as well as other site areas. ENSR International subsequently was responsible for the design and implementation of the vapor intrusion gas mitigation system for the new building. Their design was based on the combination of a spray-applied, impermeable gas vapor membrane, LIQUID BOOT®, and a trenchless gas collection system, LIQUID BOOT® GeoVent. The benefit and versatility of the LIQUID BOOT® spray-application became immediately evident when LIQUID BOOT® applicators, Terrafix Environmental, encountered earthen-poured grade beams that were extremely rough at the surface. They were able to achieve a gas-tight seal with some field expertise by "flooding" the edge of the grade-beam with LIQUID BOOT® and then attaching the LIQUID BOOT® membrane to the flooded edge of the grade beam. Such a solution would not have been an option with a sheet membrane the use of LIQUID BOOT® resulted in a gas-tight membrane system that could be installed significantly faster than any other system, given the challenging site conditions.
 
Cambridge, MA | 80,000 Square Feet |
Kendall Square is a 10 acre mixed use development consisting of approximately 1.3 million sq. ft. of new construction combined with two underground parking structures. The primary focus of the development is life science offices and R&D.” Kendall Square is located within the limits of a former Manufactured Gas Plant (MGP) site, making the project one of the largest brownfield redevelopments undertaken in the Commonwealth of Massachusetts. The remediation program consisted of a combination of mass excavation with off-site disposal and in-situ stabilization of the MGP residual wastes. The primary contaminants of concern (COC) were sub-surface coal tars and related products. The majority of the remediation was completed in the fall of 2001. Currently, two multi-level, life science buildings are under construction, both of which are approximately 300,000 square feet in size (gross area). The buildings are located within an area of the site that was remediated using in-situ stabilization. As a result, there are some residual organic compounds present in the sub-surface soils. To fully mitigate the potential threat of any migration of the COC's into the buildings, the RETEC Group Inc., environmental engineers for the site, designed a comprehensive vapor control system. Their design included a state of the art venting system and an impermeable vapor membrane, LIQUID BOOT®, beneath the slab. More than 75,000 square feet of LIQUID BOOT® was applied on site by Terrafix Environmental. As a spray-applied membrane, using LIQUID BOOT® simplified the difficult attachments onto the numerous grade beams, footings, pile caps, electrical conduits, VCS pipes and plumbing pipes. This not only made it possible to achieve a better seal, it also ensured maximum effic-iency on installation. As noted by Blu Alexander of Terrafix Environmental, "the use of LIQUID BOOT® resulted in savings of time, man-power and significant costs versus a sheet membrane."
 
Carson, CA | 150,000 Square Feet |
Los Angeles County Methane Guidelines requires an approved methane barrier when building within 1,000 feet of a landfill. Being that the new Target store in Carson, CA is situated in close proximity to the former Cal Compact Landfill, regulations required that an approved gas vapor barrier and passive gas collection system be used under the entire slab of the store. George Johnson of Kleinfelder, Inc. specified LIQUID BOOT® and designed the methane mitigation system that would be installed under the slab of the store as well as on the below grade walls. Allwest Remediation, an approved LIQUID BOOT® applicator, installed approximately 150,000 square feet of LIQUID BOOT® membrane as well as the passive gas collection system.
 
Chicago, IL | 2,400 Square Feet |
A Wendy’s franchise owner chose to build a restaurant near an adjacent shopping center in Chicago’s south side. During initial site investigations, Giles Engineering (Waukesha, WI) was hired to perform some site analysis. Through their research, Giles learned that the site had been a former service station, and discovered that some residual petroleum contamination remained in the soil below the proposed restaurant footprint. When excavating the waste was determined to be cost-prohibitive, Giles was faced with the task of eliminating all potential VOC exposure pathways. LIQUID BOOT® was selected as the product of choice to seal off the building footprint from the contaminated gasses. In order to better protect the structure, LIQUID BOOT® GeoVent was also used to provide a venting layer beneath the membrane. LIQUID BOOT® GeoVent was placed in a layer of sand to provide adequate ventilation. The LIQUID BOOT® gas vapor barrier system was then installed over the venting and sealed to all footings and all pipe penetrations. LIQUID BOOT® was chosen because of the product’s ease of installation and ability to seal directly to all required attachments.
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