• Site Location: Eastern PA
• Contamination: Carbon Tetrachloride (1500 ppb); and Chloroform (190 ppb) in groundwater.
• Geology: Sandy silt with some gravel to a depth of about 6 ft; below this it changes mostly to silt with some sand underlain by weathered bedrock. The water table is approximately 6-7 ft bgs.
• Area Treated: ~5,650 Sq. ft area at 5-20 ft bgs vertical depth interval.
• Effectiveness: Site-wide Carbon Tetrachloride reduced by 86% and Chloroform by 76%.

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• Site Location: Eatontown, NJ
• Contamination: TCE, PCE, cis-1,2-DCE, BTEX, and PCBs.  Average Concentrations: GW VOC (75,204 mg/l); Soil VOC (2,402 mg/kg); GW PCB (ND); and Soil PCB (4,095 mg/kg).
• Geology: Sands and silt from ground surface to a depth of ~45 ft bgs underlain by sandy clays. Depth to groundwater is ~7-8 ft bgs; GW flow is moderate and to the north.
• Area Treated: ~32,600 Sq. ft total area. Target treatment zone ranged from ~5-20 ft bgs.
• Effectiveness: For soil, VOC reduction was achieved at 10 of 12 monitoring locations with reduction rates ranging between 75% to greater than 99%. PCB reduction rates ranged from 35% to greater than 99% at 10 of 12 locations. For GW, VOC reduction was achieved in all 8 monitoring locations with reduction rates ranging from 70% to greater than 99%. PCBs were present below detection limits in GW. Baseline versus post-treatment mass calculations indicate an approximate 70,600 lbs mass destruction in soils and groundwater within the target treatment area.

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• Site Location: Mechanicsburg, PA
• Contamination: Bedrock aquifer impacted with VOCs, SVOCs, PAHs, PCBs and pesticides. Primary site COCs include Chlorobenzene (817 ug/l), cis-1,2-Dichloroethene (1,673 ug/l), 1,4-Dichlorobenzene (51 ug/l), Vinyl Chloride (141 ug/l) and Trichloroethene (3,712 ug/l).
• Geology: Clay and silt extends from ground surface to 30 ft bgs underlain by fractured limestone bedrock.  Depth to groundwater is approx. 30 ft bgs; hydraulic conductivity is between 4.3x10 -4 cm/sec and 8.6x10 -3 cm/sec.  
• Area Treated: Approx. 130,000 Sq. ft total area.  Target treatment zone ranged from approx. 30 ft bgs to 100 ft bgs within the fractured bedrock.
• Effectiveness: 87% site-wide reduction of VOCs from average baseline. 20 wells sampled. CB below RGs in 15, 1,2-DCE and VC below RGs in 12 wells, TCE below RGs in 8 wells, Aroclor 1260 below RGs in 14 wells, 1,4-DCB below RGs in 19 wells, 4,4-DDT below RGs in 18 wells and alpha-BHC below RGs in 19 wells.

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• Site Location: Rome, New York
• Contamination: Chlorobenzene (CB), 1,2-dichlorobenzene(1,2-DCB), 1,3-dichlorobenzene(1,3-DCB), 1,4-dichlorobenzene(1,4-DCB).  GW Average VOC Concentrations: CB (1,333 ug/l), 1,2-DCB (94 ug/l), 1,3-DCB (7 ug/l) and 1,4-DCB (111 ug/l).
• Geology: Silty sands with minor quantities of clay, bedrock approximately 25 feet bgs.   Depth to groundwater is ~10-12 ft bgs; GW flow is moderate and to the southwest.  
• Area Treated: ~8,000 Sq. ft total area.  Target treatment zone ranged from ~10-25 ft bgs.
• Effectiveness: For GW , VOC reduction was achieved at all monitoring locations with reduction rates ranging between 39% to 99%.  Average VOC concentrations were reduced by 78%. Average concentrations of CB were treated from a baseline concentration of 1,333 µg/l to 263 µg/l. Conservative mass calculation estimated between 5.9 -10.5 lbs VOC mass removal following Phase I and between 17.4 -17.6 lbs. of VOC mass removal following Phase II.

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• Site Location: Middle, Georgia
• Contamination: VOCs including Chlorobenzene (7,412 µg/l ), TCE (2,455 µg/l ), cis-1,2-DCE (7,039 µg/l), DCB Isomers, arsenic, lead, cadmium, chromium and SVOCs including polycyclic aromatic hydrocarbons (PAHs).
• Geology: Fill material consisting of clay, silt and sand from ground surface to a depth of approximately 10 feet bgs underlain by a clay unit to approximately 40 feet bgs.
• Area Treated: Source area and plume (estimated to be 307,500 sq ft). Target treatment interval from 30-50 feet bgs for majority of site and from 10-20 feet bgs for the southern most areas of the site.
• Effectiveness: A 90% reduction in all 10 compliance wells was noted after 5th full-scale injection event. The 10 compliance wells selected for the site performance criteria remediation goals showed reductions ranging from 70%-99%.

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• Site Location: East Coast, United States
• Contamination: Carbon Tetrachloride (500 µg/l ); and Chloroform (18 µg/l) in groundwater.
• Geology: Fine to medium silty and clayey sand matrix underlain by a sandy clay semi-confining unit at 35 feet bgs. Average hydraulic conductivity was 1.00 x 10 -4 cm/sec. The water table is approximately 4.5-12 ft bgs.
• Area Treated: ~9,000 Sq. ft area at 20-35 ft bgs vertical depth interval.
• Effectiveness: Treatment program results indicated an overall VOC destruction of 87% in the treatment area with chloroform being treated to ND values.

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• Site Location: Edison, New Jersey
• Contamination: Carbon Tetrachloride, Chloroform, TCE, PCE, Vinyl Chloride, and 1,1-DCE.
• Geology: Site is underlain by shale of the Passaic formation. Competent bedrock is overlain by up to 10 feet of unconsolidated materials consisting of in-place weathered bedrock, silt and clay, as well as some reworked local soil. The water table is approximately 6 ft bgs.
• Area Treated: Target treatment area is approximately 415 ft x 275 ft. The target vertical treatment zone covered the 10-100 feet bgs depth interval. Injection well clusters were installed and two depth intervals (10-50 feet bgs and 60-100 feet bgs) were targeted.
• Effectiveness: Average VOC results for all 22 wells sampled show an overall 52% reduction following the last application. Additional treatments have been approved by the client and are pending regulatory approval.

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• Site Location: Northern California
• Contamination: Dichlorobenzene isomers and VOCs. Primary COCs were 1,2-DCB and 1,4-DCB.
• Geology: The subsurface is comprised of interbedded layers of silt, silty sand and sand.
• Area Treated: Target treatment area covered a portion of the 11-acre site containing dissolved phase COCs. The target vertical treatment zone covered the 9-15 feet bgs depth interval. Approximately 360 temporary DP points were utilized to perform ISCO throughout the site.
• Effectiveness: Concentrations of 1,4-DCB and 1,2-DCB in groundwater were reduced by 99% and 96%, respectively.

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• Site Location: Arlington, Washington
• Contamination: Pentachlorophenol (PCP).
• Geology: The subsurface at the site consists of interbedded silty sands and sandy silts to approximately 7 feet bgs. Medium to coarse sand was encountered from 7-16.5 feet bgs. Depth to GW ranged from 7.5-11 feet bgs.
• Area Treated: Target treatment area was approximately 22,500 sq. feet covering the 11-17 feet bgs interval during the first event and the 7-16 feet bgs interval during event II. Approximately 140 temporary DP points were utilized to perform ISCO throughout the site.
• Effectiveness: Average PCP concentration in groundwater was reduced by 91%.

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• Site Location: Portland, Oregon
• Contamination: Pentachlorophenol (PCP).
• Geology: Upper zone is a discontinuous, unconfined aquifer compromised of fill and river alluvial deposits, consisting mainly of sand. There is seasonal variability in the upper water zone; seasonal high levels in winter and spring and low levels in the fall, about 3 feet in variation. The confining unit consists of silt to sandy silt of variable thickness, between 1-17 feet thick.
• Area Treated: Target treatment area was approximately 5,600 sq. feet in the source area and 30,000 sq. feet in the downgradient plume. The target treatment interval covered the 16-19 feet bgs aquifer interval.
• Effectiveness: Average PCP concentration in groundwater was reduced by 93%.

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• Site Location: Syracuse, New York
• Contamination: Ethylbenzene, xylenes and 2-ethylanthraquinone (2-EAQ).
• Geology: Subsurface is compromised of fill, clay, clayey silt, silt, silty sand, and sand from surface to approximately 26 feet bgs. Depth to water is approximately 6 feet bgs.
• Area Treated: Target treatment area was approximately 6,000 sq. feet targeting the 8-16 and 18-26 feet bgs aquifer intervals.
• Effectiveness: Saturated soil concentrations of xylenes, ethylbenzene and 2-EAQ were reduced by 93%, 93% and 76%, respectively.

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