Investigation Chlorinated Solvents & PNAs/PAHs in Soil and Groundwater, Miami, Florida

Mr. Green designed and performed sub-surface soil investigations demonstrating that soil remediation and closure sampling performed by others (in 1990) failed to achieve clean-up objectives. The site soil and groundwater were impacted with solvents associated with a former drain field that was located outside the building at this printing press service facility located in Miami, Florida. The soil investigations included 21 soil borings inside and outside the subject building, through sand to the bedrock at 40 feet. Mr. Green also managed site surveying, groundwater sampling and waste disposal activities. Groundwater samples were collected from 12 existing monitoring wells to depths of 150 feet. Mr. Green managed the installation of three (3) additional groundwater monitoring wells in the shallow sand unit.

Mr. Green performed data analysis and prepared 2-Dimensional contour maps of site ground surface, groundwater flow, bedrock surface and chemical distribution in shallow groundwater, using Surfer® and AutoCADD 14®. Mr. Green also prepared a 3-Dimensional computer model of benzene in site soil using 80 data points, in VOXEL® and MicroStation®. The three-dimensional computer model demonstrated the orientation of three (3) benzene plumes in the site soil. An evaluation of remedial alternatives is currently being performed for this project.

Fast-Track Investigation of a Printed Circuit Board Manufacturing Plant, Southern California

Mr. Green designed and performed a fast-track sub-surface soil and groundwater investigation demonstrating the extent of on-site impacts by chlorinated solvents, associated with a site process water treatment system. This project included the performance of eighteen soil borings, installation, development and sampling of eight (8) monitoring wells to depths of 100 feet or more, and rush analysis of 75 soil and groundwater samples for chemical and geotechnical parameters. The investigation was performed in three (3) phases. Mr. Green performed data analysis and prepared 2-dimensional models of ground surface, groundwater flow, aquitard surface, vertical and horizontal chemical distributions in the subsurface, using Surfer®. Mr. Green completed all tasks including preparation of one (1) interim report and a final investigation report all within 60 days of initial client contact.

Investigation with Remediation of an Abandoned Facility, Northeast Illinois

Mr. Green designed and performed a subsurface soil and groundwater investigation that demonstrated closure of a former gasoline underground storage tank that was removed by others, at an abandoned Site. Impacted soil was reportedly excavated but no disposal manifests were provided. Mr. Green then performed a document search of another consultant's files, revealing that the impacted soil from the former underground storage tank was excavated and moved to another part of the Site, adjacent to wetlands. Mr. Green performed soil sampling demonstrating that the impacted soil contained leachable lead at concentrations greater than the clean-up objective. Mr. Green built a 1,200-foot haul road across incompetent soils to provide access to the impacted soils and then managed the excavation, transportation and disposal in a permitted landfill, of approximately 8,000 tons of leachable lead impacted soil. Closure sampling demonstrated that the impacted soil was successfully removed, and Mr. Green prepared a Remedial Action Completion Report that was approved by the State of Illinois.

Investigation and Remediation using Engineered Bio-Pile, Northern Illinois

Mr. Green designed and performed a subsurface soil investigation demonstrating that soil excavation and closure sampling performed by others in 1993 did not achieve clean-up objectives, as reported. Mr. Green designed, built and managed a bio-pile for the remediation of gasoline constituents in silty soil. Mr. Green directed the excavation of impacted soil, bio-pile construction/management activities, surface water run-off/groundwater management, application of surfactant, micro-nutrients, and microbes. This work was complicated by the presence of sewers and a 13,600-volt underground electric line. The work also required the movement of a 2-inch gas line.

Mr. Green performed three-dimensional computer modeling demonstrating the presence of a separate plume of chemicals of concern, of undetermined origin, that was physically separate from the former underground storage tanks. Two (2) consecutive quarters of post-remediation groundwater sampling demonstrated the reduction of benzene concentrations from 4 ppm to less than 0.002 ppm. Mr. Green prepared the Corrective Action Completion Report summarizing the Site activities, model inputs and results. This report is currently being reviewed by the IEPA.

Investigation and Remediation of an Abandoned Facility, Chicago, Illinois

Mr. Green designed and performed phased subsurface soil and groundwater investigations and provided site management during remediation of a 16-acre site purchased by the client. Mr. Green also directed the sampling and management of numerous scattered drums of waste oils, hydraulic fluids and unknown liquids. Mr. Green prepared interim reports regarding the results of the phased investigations. Mr. Green also prepared and awarded bids and contracts for excavation, trucking, waste disposal, asbestos abatement and tank removal.

The site was first occupied in 1918, but was abandoned at the time of the site investigations. Site investigations revealed past excavation and landfill activities across half the Site. Laboratory analyses detected elevated concentrations of lead in the soils throughout the site, as well as lead concentrations in groundwater above potable use standards. The site investigation also found underground storage tanks, asbestos containing building materials, and lead based paint. Mr. Green performed a hydrogeologic investigation demonstrating that Class II Groundwater Standards should apply as clean-up objectives at the Site.

Within one month of initial contact with the Illinois Environmental Protection Agency (IEPA), Mr. Green's request for redesignation of the groundwater was accepted by the state, saving the client the cost of cleaning the site to potable water standards and allowing the purchase to proceed.

Mr. Green provided field management of remediation activities including the excavation and disposal of more than 15,000 cubic yards of soil, removal of four (4) USTs and abatement of greater than 100,000 square feet of asbestos-containing building materials. Site remediation activities were performed coincident with the complete renovation of a 330,000 square foot building on the site and were completed in less than four (4) months. This necessitated close coordination and frequent meetings with the contractors not associated with the remediation activities. Upon completion of remedial activities and closure sampling, Mr. Green prepared a Remedial Action Completion Report that was approved by the Illinois Site Remediation Program.

Free-Product Investigation and Remediation at a Paint Manufacturer, Northeast Illinois

Mr. Green designed and performed phased soil and groundwater investigations at this paint manufacturing facility after the removal of underground toluene storage tanks by others. Investigations revealed the presence of free-product in the former tank pit. Mr. Green supervised the design and installation of a groundwater treatment system. Mr. Green performed bid preparation, bid awards, contract preparation, permitting and oversight of sub-contractors performing electrical, plumbing and excavation activities.

The groundwater treatment system pumped water to an air-stripper that was 99.5% efficient at treating the free-phase toluene, and achieved Class II Groundwater clean-up objectives. Mr. Green also applied micro-nutrients and specialized microorganisms across the former excavation through temporary boreholes. The oxygenated/treated water entering the re-infiltration galleries from the air-stripper provided an oxygen source for the added microorganisms. Mr. Green provided oversight of system maintenance, modifications and disposal of waste sludges and mineralizations generated during system operation.

 

 

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