The Board of Directors of KEMRON Environmental Services, Inc. is pleased to announce the promotion of John M. Dwyer to President of KEMRON. Headquartered in Atlanta, KEMRON is a nationally recognized environmental consulting and remediation firm whose nationwide offices serve industry and government. John will continue to lead the corporation in strategic growth and market expansion. As President, his role will include corporate governance and financial positioning as well as formulating strategic plans for new business opportunities.
As Vice President, John led KEMRON through significant market expansion, guiding the firm through our recent series of high performing and profitable years. He was instrumental in our conversion from a privately held company to a 100% employee-owned ESOP corporation. During his 37-year tenure, our industry and company have evolved significantly and John has continued to position KEMRON as an industry leader, expanding the corporation into new and exciting market areas.
We congratulate John on this well-deserved promotion. Under his continued leadership, we look forward to many more years of KEMRON thriving as an industry leader and innovator.
We are pleased to announce that Joseph A. Klemp, P.G. has joined KEMRON as a Senior Project Scientist. He will be joining KEMRON’s consulting services group supporting the continued expansion of our nationwide service offerings. KEMRON, a small business in the environmental remediation market, provides a nationwide resume of support to the federal government and private industry providing expertise under both RCRA and CERCLA. As a Senior Project Scientist, Mr. Klemp will be supporting Performance Based, Cost Reimbursable and Fixed Price contracting proposal development for commercial, municipal and Federal proposals, as well as technical and management support on US Army, USACE, Navy, and other Federal initiatives.
KEMRON was awarded a five-year, $84 million CPFF and FFP hybrid task order to clean up munitions and explosives of concern (MEC) and hazardous and toxic waste (HTW) in site soils at the former Fort Ord in Monterey, California. The scope of work includes mechanical and manual clearing of vegetation, prescribed burning of vegetation, surface MEC removal, subsurface MEC removal, digital geophysical mapping, advanced classification geophysics, and removal, certification, and recycling of munitions debris (MD) and range-related debris. Various other work tasks within the scope include provision of an Administrative Records Coordinator in the Army’s BRAC office on site, managing several complex databases, managing two project websites, preparing the CERCLA 5-Year Review report, and performing various erosion control projects across the former Impact Area. KEMRON is managing this program under our earned value management system with a WBS structure of several hundred unique tasks and associated cost codes.
The following major work elements (projects) comprise the work under this contract: Impact Area Munitions Response Area MEC Remediation; Bureau of Land Management Area B MEC Remediation; Basewide Range Assessment (HTW soil remediation); Erosion Control at Various Range Sites; various Restoration projects: Advanced Classification Geophysics remediation and technology pilot study projects; MMRP Database, GIS and Website Management; and Biological Support.
KEMRON has performed both mechanical and manual mastication of planned fuel breaks for planned prescribed burns in the former Impact Area and nearby Bureau of Land Management (BLM) Area B. Through 9/17, over 600 acres of containment lines have been cleared of vegetation using two subcontractors with Feller Bunchers and two subcontractors with 7-8 person manual cutting teams. Manual cutting also included significant brush clearing and tree limbing of canopies up to 8 feet above ground surface, so that the risk of “crowning” during prescribed burns would be minimized. All manually-cut vegetation was collected and stockpiled for two different chipping operations. Chipped material has been reused all across the Impact Area for various erosion control projects.
KEMRON has completed all field work at Impact Area Unit (IA) 5A (33.4 acres), Unit 09 (81 acres), Unit 11 (62 acres), Unit 12 (107 acres), Unit 23 (347 acres), Unit 25 (95 acres), and Unit 28 (101 acres). We have completed portions of the following IA units: Unit 31 (57 acres), Unit 13, (17 acres), Unit 17 (4 acres), and Unit 20 (10 acres). KEMRON has recently completed performing field work for a portion of BLM Area B, Unit A (55 acres), and primary containment lines for future prescribed burns in BLM Unit B (81 acres) and Unit C (64 acres). The work in these units included vegetation cutting, grid/boundary staking, and surface MEC removal. DGM is now ongoing in these units. Also ongoing is the completion of 2 cut-only units in BLM Area B, Unit B-2A (72 acres) and Unit B-3 (169 acres). KEMRON has also finished preparations for the prescribed burning of up to 5 units in 2017, including containment line preparation, aerial and ground support staffing, wildland fire training, dip tank and piping/pumps setup, and coordination with the Army. These complex and extensive burn preparations were completed precisely on the schedule established several months ago to be “burn-ready.”
KEMRON has completed the digital geophysical mapping (DGM) of over 720 acres in the Impact Area and BLM Area B since the inception of the project. A towed array with three EM-61 sensors is utilized to prepare the subsurface anomaly maps that are eventually provided to the BLM and used for decision making regarding subsurface MEC removal efforts. Some person-portable DGM surveys have also been conducted in areas of special biological concern (eg, ponds) and to gather information around obstructions that was not able to be collected with the towed array assembly (eg, tree clusters).
KEMRON has performed several subsurface MEC removal projects on Fort Ord, including the Unit 23 New Access Routes, Units 1, 2, and 3 New Fuel Break Roads, Chinook Road Fuel Break Expansion, Nowhere Road Realignment, and Little Moab Road Construction. To date, over 330,000 pounds of MD have been removed, sorted, and certified for offsite smelter recycling, and 4,300 MPPEH items have now been collected and destroyed/to be destroyed in the course of numerous demolition operations, both consolidated shots and blow-in-place shots.
KEMRON employs an extensive quality control (QC) program to assure accurate and complete field activities and data collection. USACE’s 3-phase QC process is employed for every field activity in each Impact Area or BLM Area B unit, beginning with the conduct of a thorough preparatory meeting. All field personnel and managers, including client representatives, attend these kickoff meetings, and a detailed agenda covers specific work task processes, procedures, governing documents, biological protection issues, and safety issues. As the work proceeds, the required series of inspections from initial to final work stages by the project’s Contractor Quality Control Systems Manager (CQCSM) with client representatives is performed and documented.
For munitions cleanup QC, the project Unexploded Ordnance Quality Control Supervisor (UXOQCS) places QC seeds in near-term grids to be cleared with a target find rate of 1 QC seed per team per day. Through 9/17, spanning a period of 2.25 years, a total of 1,485 QC seeds have been recovered by KEMRON’s UXO teams with zero misses. The QC seed recovery rate to date has been 0.95 QC seeds found per team per day. In addition, 630 QA seeds, placed by USACE’s OESS, have also been recovered by KEMRON’s teams without any misses to date. The UXOQCS also personally sweeps a minimum of 10% of the grids by all teams as a further QC check on completeness, and he continually observes and coaches field team leaders and individual technicians on surveying techniques.
Prescribed burning for vegetation removal is a large part of the KEMRON scope of work for Fort Ord. All major burn subcontractors have been procured through KEMRON, including Burn Boss, Air Ground Operations Supervisor, air-ground communications, ignition and suppression helicopters, wildfire ground crews and fire engines, water trucks, other equipment, dip tank management staff, security staff, UXO staff, and others. When a meteorological window (for optimum smoke behavior to minimize local impacts) presents itself, KEMRON has only 48 hours to assemble the entire burn support team on site, with key partners coming from as far away as central Oregon. KEMRON’s Burn Boss and ASGS work closely with the Incident Commander, the Presidio of Monterey Fire Chief, on burn day operations.
KEMRON has successfully completed the innovative subsurface remediation of large, near-surface ordnance items in Units 11 and 12 using advanced classification (AC) geophysics (Metal Mapper) in order to safely conduct burns of these units. That AC project included 688 target excavations and the subsequent removal and destruction of numerous large and medium-sized ordnance items. Other AC projects to complete remedial actions involving TEMTADS and Metal Mapper 2×2 are ongoing.
USACE has included significant erosion control and range restoration projects within the KEMRON scope of work. Many of these projects have already been completed, with most including clearance of ordnance to depth prior to beginning site earthwork. KEMRON has also completed construction of the approximately 1-mile long Little Moab Road in BLM Area B. This roadway was brand new construction over some challenging, hilly terrain, and the project included some adjacent erosion control measures to protect nearby biological resources and preserve the roadbed for a longer period of time. In conjunction with the Army and BLM, KEMRON designed the road alignment and then performed the earthwork, base compaction, rock placement, and final grading in the field.
KMERON is also engaged in HTW cleanup activities at Fort Ord. The Basewide Range Assessment (BRA) program is a final step after the completion of MEC remediation activities to carefully examine site soils for both lead and explosives contamination. A combination of historical site research, known range usage, current site features, other site reconnaissance, and then, if warranted, multi-composite soil sampling a varying depth intervals is conducted to thoroughly examine the potential for HTW contamination. Through 9/17, KEMRON completed evaluations of 2 IA units (with 1 successfully petitioned for no further action without any sampling), was currently evaluating soil sampling results for 1 unit, and was preparing sampling work plans for 3 additional units.
KEMRON was contracted to perform a dewatering study for coal ash from the Emory River Ash Pond Site. The objectives of the treatability study included: 1) evaluate the potential for dewatering of the site material (Ash slurry), 2) provide information for users of the study to determine the scale of operation required, 3) evaluate filtration effectiveness of free liquids removed from the site material, and 4) evaluate the handling characteristics of the site materials.
All treatments performed during the treatability study were based on discussions with the client and KEMRON’s experience treating similar types of sludges. After initially characterizing the moisture content, bulk density to confirm the ash slurry represented the ash at the site, The ash slurry provided to KEMRON already contained a treatment of 2% polymer. Therefore, KEMRON proceeded to the Treated Dewatering Evaluation phase of testing. Filter press testing was performed to evaluate the reduction in moisture content that can be achieved by the application of a positive pressure to the untreated ash material. Bench-scale testing was performed at a positive pressure of 150 pounds per square inch (psi) using a Baroid filter press apparatus designed to simulate a plate and frame filter press.
KEMRON generated a 20 % solids ash slurry using site groundwater ratio and used three filter media in the preliminary evaluation. The filtering medium was a coarse grade filter paper with a pore size of 40 micron (um), 20 to 25 um, and 10 um. Filter press testing was performed at a positive pressure of 150 pounds per square inch. The time to reach breakthrough (either no water drained or air blew through drainage) was recorded. Each filter cake was then removed, weighed, measured, and subjected to moisture content testing, bulk density testing, and subjective visual and manual handling evaluation. The objective of the handling evaluation was to determine if the material can be handled by heavy duty machinery and/or stacked.
Based on the results of evaluation, the use of filter press technology was effective in reducing the ash slurry to a relatively dry material which can be stacked, loaded, and transported.
study revealed that the use of a 20 to 25 um filter media and a 40 um filter media increased the 20 % solids ash slurry to an approximate 80 % solids material, with no free liquid. The percent solids of the filtrate significantly increased from 0.88 % to 5.5 % in the 20 to 25 um and 40 um samples, respectively.
FMC manufactured chemicals on several parcels of its property in Newark, California from 1929 through 1995. Chemicals manufactured at various times included quick lime, bromine, Ethylene Dibromide (a soil fumigant), magnesia compounds, phosphates, and phosphoric acid. The bromine towers, EDB plant, and magnesia plant were shut down and the manufacturing facilities were removed in 1968. The phosphate plant and phosphoric acid plant were shut down in 1994 and 1995, respectively. All manufacturing facilities were removed by the end of 1996. FMC’s activities at the site currently consist solely of maintaining engineered asphalt caps at the former EDB plant (EDB Cap Area) and the phosphorus storage pit areas, and continued operation of a groundwater remediation and monitoring system. ERM contracted with KEMRON ATG to perform an ISS, Slurry Wall, and Chemical treatment treatability study. The concentrations of the contaminants of concern were up to 10x IDLH conditions. KEMRON Applied Technologies Group (ATG) designed and built a negative pressure treatability room with supplied air (Level B) capabilities to perform the treatability study. The environmental room was constructed and ready for operations in eight business days. The objectives of this highly complex study included:
Evaluate potential remedial technologies to determine which are viable based on EDB Cap Area physical and chemical characteristics of soil, DNAPL, and groundwater in the source zone parcels and down gradient parcels
Evaluate slurry wall amendments mix designs for down gradient locations
Evaluate the potential for grout slurry wall incompatibilities resulting from the geochemical (saline/brackish conditions) and chemical constituents in the targeted site soil and groundwater
Determine the hydraulic conductivity resulting from various slurry wall mixes
Evaluate solidification/stabilization reagents capable of improving strength of materials and reducing the permeability of the source zone soils
Evaluate solidification/stabilization reagents capable of reducing leachate generated by the new EPA LEAF (EPA 1315) Method while implementing an innovative proprietary sampling methodology modification to this EPA method developed by KEMRON
Reduce the COC mass in soil and groundwater through chemical treatment
Evaluate which amendment is most effective at reducing concentration/leachate of all primary COCs without mobilizing naturally occurring metals
Evaluate effectiveness of chemical oxidant/reductant reagents in combination with ISS amendment at reducing COC/leachate concentrations.
The treatability study successfully achieved the objectives of the study.
KEMRON was contracted by the USAESCH to conduct a Remedial Investigation/Feasibility Study (RI/FS) for 13 Munitions Response Sites (MRS) at the former Camp Gordon Johnston (CGJ). Several distinct approaches were used to determine the nature and extent of munitions and explosives of concern (MEC) and munitions constituents (MC) at each MRS. KEMRON utilized “Mag and Dig”, anomaly count transects and digital geophysical mapping (DGM) to locate subsurface anomalies.
A Removal Action (RA) was conducted prior to the RI at three of the MRSs at the former CGJ. Due to the presence of munitions near the boundaries of two of these MRSs, KEMRON proposed that “Mag and Dig” transects be conducted in a radial pattern to further delineate munitions at these MRSs. In addition, soil and groundwater samples were collected inside these MRSs to determine if MCs were present. KEMRON successfully determined the nature and extent of MEC and MC contamination at each site.
KEMRON developed the unique approach of using anomaly count transects to determine areas where there was an elevated density of subsurface anomalies. By using this approach, DGM grids could be surveyed in areas where there would be an increased likelihood of locating munitions items. This method was also used at two MRSs that were identified as small arms ranges. In addition to the information collected from the anomaly count transects, KEMRON identified physical features of a firing range to identify areas where soils samples were collected and analyzed for lead.
One of the most challenging MRSs was the Alligator Point Gunnery Range due to the fact that the MRS covered both land and water totaling 3,689 acres. The water portion of the MRS was in the Gulf of Mexico and encompassed approximately 3,500 acres. KEMRON oversaw the work of two subcontractors in order to perform the underwater DGM investigation and diving operations. KEMRON designed an approach that identified concentrated areas of MEC and MD by conducting preliminary transects to locate potential concentrations of munitions. Based upon the results of the intrusive investigation of identified anomalies, follow up transects and subsequent intrusive investigations were conducted to determine the extent of the MEC contamination. Due to the presence of protected bird and turtle species, field activities at this MRS were conducted during periods that were less likely to interfere with nesting activities of these species. As a result of the RI at this MRS, a presumed target area was identified and the proposed boundary of the MRS was reduced to approximately 800 acres.
KEMRON arranged the Technical Project Planning (TPP) meetings and successfully coordinated with the residents and business owners within the CGJ investigation area. The goals of the RI were accomplished at each of the MRSs with minimal disruption to the residents in the investigation area.
KEMRON completed a CR TO under the Huntsville Worldwide Environmental Remediation Services (WERS) Multiple Award Task Order Contract (MATOC). The performance objective was to achieve Response Complete at Solid Waste Management Unit (SWMU) 2 at the Deseret Chemical Depot in Stockton, UT (now known as Tooele Army Depot-South). SWMU 2 was an area contaminated with discarded military munitions (DMMs) and possible chemical weapons munitions (CWMs) and other military devices as well as a suspected burial trench containing both DMM and CWM. KEMRON completed the removal of contaminated soils, material potentially presenting an explosive hazard (MPPEH), and disposition of all recovered material through disposal or destruction. Final confirmatory sampling confirmed Response Complete.
SWMU 2, a 10-acre parcel in the southwest portion of the Chemical Munitions Storage Area at Deseret, was historically used for the disposal of munition-related items to include conventional weapons as well as suspected mustard agents and other chemical munitions. KEMRON collaborated with the Edgewood Chemical and Biological Center (ECBC) and Chemical, Biological, Radiological or Nuclear Analytical and Remediation Activities (CARA) to provide field support for safety during intrusive and removal action activities. KEMRON prepared the work plan for this removal action, an APP, a Chemical Safety Submission (CSS) to the Department of Defense Explosives Safety Board (DDESB).
Digital geophysical mapping (DGM) techniques were employed to identify single point anomalies as well as the location of the suspected burial pit and delineate the boundaries of this disposal area. Prior to any intrusive activity, the KEMRON team underwent pre-operational training and drills with oversight and approval by Edgewood Chemical and Biological Center (ECBC) and CARA. Emergency personnel and evacuation equipment were present at all times during this removal action.
The disposal trench defined during the DGM study covered an area of approximately 50 ft by 300 ft. Fifteen ft of overburden was removed from the trench prior to encountering DMM. Once the overburden was removed, KEMRON recovered 112,243 Atlas squibs, 704 E46 cluster bomb units (CBUs) 1,448 M1 and M4 Smoke Pots, 2,589 M2 Smoke Candles, 640 M6 CN/DM grenades, and an assortment of fuses and boosters. All DMM was carefully removed, repackaged, and stored in existing bunkers to await final disposal. Contaminated soil recovered during this removal action was stockpiled and segregated pending final disposition. Contaminated soil (5,000 yards) was transported off-site for disposal at a Subtitle D disposal facility. Thermal destruction of the smoke pots, grenades, and candles was originally proposed as an on-site operation but the presence of chemical agents (arsenic) and stringent air discharge criteria ultimately precluded this process. These units were packaged and transported to a licensed incinerator for final disposal. The CBUs were destroyed on-site. KEMRON designed a burn chamber consisting of an open top 20-yd3 container. A flex liner shape charge (FLSC) was attached to each CBU to open the unit and facilitate burning. The CBU was packed in dunnage along with an ignitor and smokeless powder. The shape charge and squib were ignited simultaneously to initiate the burn unit and subsequent CBU detonation. 704 CBUs were destroyed in a system of eight burn chambers.
Confirmation sampling in order to achieve Response Complete included surface soil samples, wall and floor samples from the disposal pit, direct push technology soil boring for subsurface sample retrieval and field test equipment including PIDs for organics, x-ray fluorescence (XRF) for metals and Miniature Continuous Air Monitoring Systems (MINICAMS) for CWM. In-field screening and segregation of recovered soil resulted in the identification of over 3,000 yards of soil that could be used as backfill.
Air modeling was conducted in support of the proposed thermal destruction of the smoke pots, grenades, and candles. The air modeling was completed in accordance with Utah Division of Air Quality (UDAQ) Rule R307-410 and EPA Guidelines on Air Quality Models addressing air emissions associated with the use of burn pans and open detonation. The results of the modeling effort provided quantification of the amount of munitions that could be detonated and burned on-site.
A conceptual site model (CSM) and associated data quality objectives (DQOs) were developed to support the conclusion of Response Complete identifying sources, media, pathways, receptors, COCs, analytical methods, and risk-based decision points. EPA RSLs and site-specific soil to groundwater values were derived to establish attenuation factors. This risk-based approach reduced the volume of soil requiring disposal by over 50%.
A large part of this contract is for the on-site burn operations designed for the destruction of more than 750 CBUs. Due to safety concerns, it was necessary to move all personnel away from the burn pans to a distance of more than 800 ft which prevented monitoring of the operation. KEMRON worked with the installation to obtain permission to use a drone to fly over the burn pans and video the operation. This allowed USACE, the installation, and KEMRON to evaluate all aspects of the burn without compromise to safety.
KEMRON was awarded a fixed price contract to perform sediment removal via hydraulic dredging from Dicks Creek in Middletown, Ohio for a private manufacturing client. The scope of work included design of the dredge process, design and construction of a customized dredge platform, design and construction of a 8 acre Dredge Material Management Area (DMMA) to include a lined dewatering impoundment and high flow water treatment system. All work from design to fabrication of systems through construction and operation of the hydraulic dredge and water treatment plant was completed by KEMRON personnel. The dredge area encompassed two miles of receiving stream up to the confluence with the Miami River. Key components of the project include:
Construction of a DMMA to include a dewatering bed and water treatment system
Dredging of sediment from Dicks Creek
Dewatering of sediment in GeoTubes and transport to landfill
Replacement of removed sediment with clean sand Restoration of the staging area and stream bank
The project involved removing, by hydraulic dredging, sediment at prescribed depths throughout a 6,800 foot section of creek. Dicks Creek is a rather large creek which flows into the Greater Miami River in southern Ohio. Widths vary from 50 to 80 feet. KEMRON designed and constructed the DMMA, comprised of a dewatering zone, sediment storage area and water treatment areas along the banks of Dicks Creek. The dewatering zone was cleared, bermed and lined with geotextile fabric and a 40 mil HDPE liner. A sump was created to collect decanted water from the Geotubes and contact water from rainfall. KEMRON elected to increase quality, thickness and rigidity of the liner material over preliminary design considerations due to the intended use and the volume of water to be managed. The seams of the HDPE liner were welded rather than chemically sealed, providing a much more durable temporary work area. The dewatering zone was sloped to promote drainage to a sump used to collect and route water to the water treatment plant. Sediment recovered was pumped to geotubes located in the dewatering zone.
KEMRON designed a temporary wastewater treatment system to treat water from sediment dewatering and contact water in the staging area. The system was designed to a capacity of 2,000 gallons per minute (gpm). The treatment system included two standard fractionation tanks, each rated at 20,000 gallons capacity. The system provided temporary storage capacity of up to 40,000 gallons of water and was used to manage recirculation, back flushing and bulk storage needs during the dredging operations. Transfer pumps utilized in the system were capable of pumping in excess of 1,000 gpm (each) at pressures sufficient to pass the water through the filters, piping, GAC units, and to the final discharge point on Dicks Creek. Replacement pumps were on hand throughout the project in the event of malfunction for immediate switch-out.
Sediment removal was accomplished by placing a 6-inch hydraulically operated pump on a work platform barge. Crews used two 4-inch suction hoses with specially fabricated suction heads to vacuum the sediment from the creek bed. The sediment and sand was up to three feet in depth. The water and sand/sediment mix vacuumed from the floor of the creek was pumped through an 8-inch HDPE line placed along the creek. At times the depth of the creek required the dredge team to don diving gear in order to complete the area. The sediment mixture was pumped into GeoTube bags in a dewatering bed constructed in the staging area. Polymer was injected inline prior to the material entering the GeoTubes to facilitate dewatering. Water effluent from the bags were collected in a sump and pumped through bag filters and carbon vessels prior to discharge back into Dicks Creek. On average, more than 600,000 gallons of water were treated per day.
Once the dredge crew had progressed approximately 3000 feet downstream a sand/sediment restoration crew began replacing the removed sediment with clean sand. An additional 8 inch HDPE pipeline was placed along the stream adjacent to the access road to facilitate the restoration effort. A high pressure 6 inch trash pump forced 1000 gallons per minute of water through an inductor nozzle which had been fitted with a sand hopper and connected to the pipeline. As the water passed through the inductor sand was pulled into the water stream by the venturi effect created. The sand slurry was pumped through the pipeline and into a discharge hose fitted with a fabricated diffuser head.
The final phase of the project involved stream bank restoration and restoring the 8 acre DMMA area. The design called for creating a floodplain area and a riparian forest. After grading to the prescribed elevations over 4000 shrubs and trees were planted in this area.
Under our Environmental Remediation Multiple Award Contract (ERMA), KEMRON was awarded a performance based project for environmental services at Fort Buchanan in Puerto Rico. The project includes six sites at the installation including the Northwest Boundary Area (NWBA) groundwater TCE plume, Pesticide Burial Trench, Spent Solvent Storage Area (Building 556), Used Oil Storage Area (Building 556), Heavy Equipment Storage Area (Building 556) and an Inactive Waste Disposal Area (Debris Landfill). KEMRON is responsible for corrective measures implementation (CMI) at the NWBA TCE site to include bio-augmentation and enhanced reductive dechlorination, a Vapor Intrusion (VI) Study, and long term management (LTM_ after remedy implementation. KEMRON is responsible for the preparation of the CMS for the remaining five sites. The recommended corrective measure for four of the sites in no action with a LUC applied at the debris landfill.
FTB-034 – Northwest Boundary Area Groundwater Site is a large chlorinated groundwater plume that extends off base into the adjacent Caribbean Petroleum Refinery Corporation property. The TCE groundwater plume is located in the northwestern portion of the installation. In 2010, the down-gradient limit of the plume extended outside the installation boundary and was estimated to be approximately 45.2 acres. The plume consists of chlorinated solvents, including tetrachloroethylene (PCE), TCE, 1,2-dichloroethene (1,2-DCE), and vinyl chloride (VC). The primary contaminants of concern at the site is TCE. KEMRON prepared a Corrective Measures Study and Implementation Plan (CMIP) was to design the groundwater remediation and the LTM of the site to bring the groundwater into compliance with the interim remedial goal of 100 ppb TCE. The CMIP was approved by the EPA and PRDEQ for the groundwater plume containing TCE. The CMIP was designed to bring the groundwater into compliance with applicable cleanup requirements. The CMIP was prepared for EPA and Puerto Rico Environmental Quality Board (PREQB) and included the site history, description, background, environmental setting, nature and extent summary, HHRA and SLERA summary, and the design for implementation of the groundwater remedy. In addition, to the CMIP, KEMRON prepared an APP/SSHP, UFP-QAPP and QCP.
KEMRON expedited a pilot scale treatability study which included the installation in-situ microcosms, some of which were baited with different carbon substrates, other groundwater amendments, and zero valent iron (ZVI), to determine if sufficient Dehalococcoides bacteria species were present and if the bacteria responded to the amendments to form population sizes large enough to fully degrade PCE and TCE. ZVI was also added to select locations. It was determined through pilot testing that bacterial cultures would need to be injected in the groundwater after the substrates, phosphate buffers, etc. normalized the geochemical parameters of the groundwater to support bacterial growth and reductive dechlorination.
Enhanced bioremediation via reductive dechlorination at the NWBA was implemented. To implement enhanced reductive dechlorination at the site with augmentation and stimulation, the dissolved plume exceeding the interim goal of 100 µg/L for TCE was divided into two treatment areas. The sources area was treated using a series of injection wells and the downgradient dissolved groundwater plume was treated using a barrier wall. Following injection of the ABC+® Formula, groundwater conditions at injection/extraction and nearby wells were monitored for water quality parameters including temperature, pH, conductivity, oxidation reduction potential (ORP), and dissolved oxygen (DO) to verify ideal geochemical conditions for Dehalococcoides growth and proliferation. Dehalococcoides (KB-1®) were injected into the well through nitrogen infused tubing.
Long-term semi-annual groundwater monitoring was first implemented after the Dehalococcoides injection was completed. Select monitoring wells are sampled and analyzed for chlorinated VOCs, total organic carbon (TOC), nitrate, sulfate, dissolved gases (ethane, ethene and methane), metals (calcium, magnesium, potassium, and sodium) during each sampling event. Field measurements including pH, ORP, temperature, conductivity, dissolved oxygen, and turbidity are recorded prior to collecting laboratory samples. Analytical results indicate that TCE concentrations in the sources area are declining at an increased rate since the Dehalococcoides injection.
KEMRON conducted a VI study for the Northwest Boundary Area Groundwater Site. The soil gas survey was performed to collect an additional line of evidence to evaluate VI risk to buildings located over or near the delineated TCE Plume at the site. Several buildings were included in the assessment such as the Post Exchange, the armory, the veterinary clinic, the visitors control center, and the guard house. Soil gas vapor probes were installed via direct push borings at 18 locations throughout the study area. Grab soil gas samples were collected and analyzed by EPA Method TO-15. The soil gas data was evaluated in accordance with the EPA VI Calculator and Risk assessment processes. It was determined that the chlorinated groundwater plume is not impacting nearby buildings with VI of COCs.
Site CCFTB-039 has multiple sites with work scope necessary to accomplish finalization of the Corrective Measures Studies for these sites. Site specific RG were calculated by KEMRON’s risk assessment professionals for each site based upon COCs that were detected during the RFI present above EPA Regional Screening levels (RSL) or background concentrations for metals present at Fort Buchanan. RGs were presented by COC and the determination for any remedial action at each site is based upon concentrations of COCs being present above the RG. Site CCFTB-039 consisted of the following RFI sites: Site 2 Pesticide Burial Trench, Site 3 Spent Solvent Storage Area (Bldg 556), Site 9 Used Oil Storage Area (Bldg 556), Site 11 Heavy Equipment Storage Area (Bldg 556) and Site 12 Inactive Waste Disposal Area.
Under Contract to the U.S. Navy, KEMRON provided excavation and dewatering services for 1.3 miles of drainage canals, creeks and floodplains at NSA Crane, Indiana. KEMRON was tasked with the restoration of the canal and streams and their associated riparian habitats within highly sensitive areas within the waterways (and any adjacent, abutting, or isolated wetlands) of the project that were to be impacted by the project were coordinated with the regulatory branch of the U.S. Army Corps of Engineers (USACE) and the Indiana Department of Environmental Management (IDEM).
KEMRON maintained clear and open communication with all parties and agencies involved with this project. The Navy, IDEM, USACE, Indiana Department of Natural Resources Division of Water (IDNR-DOW), U.S. Fish and Wildlife and all other applicable parties to ensure any and all permitting requirements were met.
The scope of services included the preparation of the Work Plan, IDEM SWPPP and Rule 5 Stream Work Permit and COE 404 Permit; Stream Restoration Plan, Accident Prevention Plan/Site Safety and Health Plan and QC Plan; construction of a 1 mile long access road along the creek and canal; installation of silt fence; mobilization and site preparation; dewatering; and creek and canal excavation. Restoration work included the placement of cobbles, gravel and topsoil; installation of check-dams and log stops; coir matting, erosion control blankets and riprap; and seeding and planting.
The restoration plan included a stream and canal design showing general locations of restored features in addition to a list of recommended tree and herbaceous plant species that were indigenous and of local genotype blending in with and suitable for the immediate surrounding habitat. The plan also discussed appropriate measures for site preparation, specifications for correct installation of the plant material, and recommendations for post-installation maintenance. In addition, a riparian wetland on-site mitigation plan was incorporated the overall Restoration Plan.
KEMRON also completed a regulated waters delineation of the project area which included each stream reach and canal proposed for impacts and any associated riparian wetland boundaries using USACE criteria. The delineation included surveying the wetland/upland interface, average width and depth of each stream and canals ordinary high water mark (OHWM), preparation of a written report, and assembly of supporting materials documentation, as required by the USACE.
KEMRON installed a dewatering system utilizing both pump-around and Pipe-around techniques. We installed multiple dams, pumps and piping systems to dewater the stream and drainage canals in the areas to be excavated. Any considerable tributaries were dammed at the joining point.
Necessary clearing and grubbing was performed using a large excavator, a skid steer with mulching attachment and a chainsaw. Two land clearing crews were utilized and each began at the utility corridor staging area and worked away from each other. Large trees were felled by the large excavator and then the root ball was cut within 1 foot of its top. All cleared trees and brush was removed off-site.
Creek and canal excavation was performed using Track-Mounted Excavators and D-6 Dozers. Excavation started at the upstream limit of the work area and progressed downstream. Material was excavated and directly loaded into dump trucks for disposal. Excavation was performed within the defined configuration to the limits of excavation shown on the project drawings. Transitions in bottom width and elevation were uniform. Field measured cross-sections of the final embankments and creek and canal excavations were prepared by a Professional Surveyor Licensed in the State of Indiana.