Professional Full Service Environmental Firm Specializing in Turn Key Services to Provide Cost Effective Solutions for every Situation
Active received a call from a client asking if we could help with identifying a suspected UST in the basement of a commercial property. Active begin with our in-house Geophysicist identifying and marking out the UST location. It was identified at this point that the UST appeared to be a 1,000 gallon tank. Upon completion of the identification, Active returned to the site to collect soil samples from around and through the bottom of the UST. Sample results indicated that there were detections over standard and that the UST and impacted soil were going to need to be removed. Two major concerns with the project were vapors from the UST disrupting the business and structural support. To eliminate the vapor issue, Active created a containment around the work area under negative pressure and vented the work area 150 feet to the rear of the building, thus eliminating any indoor air quality issues. Once that was established, an engineer designed structural support and the Active team went to work. As material was excavated from the work area around the UST the structural support was constructed. All material was removed by hand and the UST was cut in pieces and removed. All impacted soil was staged and later disposed of at an off-site disposal facility. The UST was recycled. Upon approval from the client, Active backfilled the excavation with flowable fill utilizing a pump truck. All the work was performed during normal business hours without any interruption to the businesses.
Active was asked to assist in a remediation project at a commercial property. Active began with the demolition and removal of an automotive repair garage so the work area could be accessed. The site had a long history of impact that was identified to an extent of approximately 30 feet below ground surface over a widespread area. Groundwater was identified to be approximately 15 feet which posed the first issue. To access the work area and depth, Active established a dewater system that pumped approximately 3 million gallons of water from the work area over the duration of the project. Over the course of this project, Active removed and disposed of approximately 800 tons of impacted soil while stockpiling the remaining clean fill to be used as backfill. To remove the final 10 feet of impacted soil Active created cells and drove sheeting to minimize the amount of groundwater flow into the excavation which allowed the dewatering pumps to keep up. Being almost 30 feet below the surface and at a minimum of 15 feet into the groundwater table, managing groundwater at this depth was a challenge, however with the sheeting it made the work easy to complete. Prior to backfilling the excavation Active placed approximately 2,000 pounds of in-situ bio remedial enhancement agent to assist in the remediation of the groundwater. The site was backfilled in one-foot lifts and completed back at the original surface grade.
This project consisted of impacted soil in a wetland area. Prior to any start of work, Active worked closely with a wetland expert and the client to establish a game plan that was cost effective and efficient all working within the sensitivity of being in an ecological sensitive area that had been identified as a wetland area. Clearing and grubbing was established to access the work area. All nonnative species were carefully removed in order to prevent any spreading of those species. As this was bring performed Active had established E&S controls to mitigate any sort of erosion during the clearing and grubbing. Once completed, Active began with the remediation work. Active removed and disposed of approximately 1,400 tons of impacted soil while stockpiling and relocating approximately 2,100 tons of for onsite reuse during future development. Upon completion, Active completed the project with seeding, planting and landscaping.
