CHLORINTATED CONTAMINANTS

REQUEST FULL CASE STUDIES HERE



 



select







Manufacturing and Warehouse Facility

ISOTEC CASE STUDY 2

    Request Case Study

Site Location: Passaic, NJ
Contamination: trans-1,2-Dichloroethene (18.8 ppb); cis-1,2-Dichloroethene (317,200 ppb); Xylenes (3,400 ppb); Ethylbenzene (2,000 ppb); Trichloroethene (78 ppb); and Vinyl Chloride (4,224 ppb) in groundwater.
Geology: Fine silt and clay layer; water table at approximately 8-10 ft bgs.
Area Treated: Approximately 1000 sq. ft .
Effectiveness:  Site-wide total VOCs were reduced from 278,849 ppb to 178 ppb.

Former Electronic Transformer Manufacturing Facility

ISOTEC CASE STUDY 3

    Request Case Study

Site Location: Ocean County, NJ
Contamination: Chloroform (25 ppb); 1,1,1-Trichloroethane (33 ppb); Trichloroethene (493 ppb); and Tetrachloroethene (212 ppb)
Geology: Sandy, silty, clay stratum (3 to 18 ft bgs) overlying basalt bedrock. Water table is at approximately 10 ft bgs.
Area Treated: Approximately 1,400 sq. ft.
Effectiveness:  Site-wide total VOCs were reduced by >70% with chlorinated VOCs decreased from 793 ppb to 269 ppb. NJDEP issued No Further Action letter and closed the case.

Former Manufacturing Facility

ISOTEC CASE STUDY 6

    Request Case Study

Site Location: Northern NJ
Contamination: Tetrachloroethene (203 ppb).
Geology: Unconsolidated zone above fractured bedrock, "Zone A"
Area Treated: ~20,000 sq. ft in Zone A (22'-26') and bedrock (38'-67').
Effectiveness:  Total VOCs reduced by 74% in Zone A & 58% in bedrock.

Manufacturing Facility

ISOTEC CASE STUDY 7

    Request Case Study

Site Location: Southern Colorado
Contamination: Tetrachloroethene - PCE (up to 19,800 ppb in the plume; higher conc. in selected hot spots).
Geology: Sand + Clay formation up to 30 ft underlain by fractured shale; water table is at approximately 25 ft bgs.
Area Treated: ~15,000 sq.ft with an interval of 20-30 ft bgs.
Effectiveness:  Achieved over 75% reduction of PCE in DNAPL source area when both SVE and P/T systems failed to meet the remedial goals.

CERCLA Superfund Site

ISOTEC CASE STUDY 12

    Request Case Study

Site Location: Midwestern U.S.
Contamination: 1,1-Dichloroethene (1,780 ppb); Methylene Chloride (3,180 ppb); Toluene (2,776 ppb); 1,1,1-Trichloroethane (33,100 ppb); Trichloroethene (29,400 ppb).
Geology: Saturated sand and gravel.
Area Treated: 1,500 Sq. ft area at 10-27 ft bgs vertical depth interval plus ex-situ treatment of 18,000 gallons purge water in a Frac Tank.
Effectiveness: Site-wide total VOCs and TICs reduced from 74,262 ppb to 7,347 ppb (90%).

Department of Defense Facility

ISOTEC CASE STUDY 14

    Request Case Study

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%.

Manufacturing and Warehouse Facility

ISOTEC CASE STUDY 15

    Request Case Study

Site Location: Bergen, NJ
Contamination: Trichloroethene (19,805 ppb); trans & cis-1,2-Dichloroethene (113,660 ppb) and Vinyl Chloride (17,570 ppb) in groundwater.
Geology: Silty soil, saturated zone from 5'-40' bgs; water table is at approximately 5-8 ft bgs.
Area Treated: 5,400 Sq. ft area at 5-40 ft bgs vertical depth interval.
Effectiveness:  Total VOCs reduced by 98% from 151,476 ppb to 3,180 ppb.

Former Dry Cleaner

ISOTEC CASE STUDY 16

    Request Case Study

Site Location: South Florida
Contamination: Trichloroethene (14,555 ppb); Tetrachloroethene (26,598 ppb); Vinyl Chloride (18,112 ppb); and Cis-1,2-dichloroethene (283,219 ppb).
Geology: Medium grain quartz sand with silty soil & limestone fragments to 42 feet bgs; indurated carbonate sandstone & limestone to 83' bgs; water table at 6 ft bgs.
Area Treated: ~24,000 Sq. ft area at 5-40 ft bgs vertical depth interval.
Effectiveness:  Total VOC's reduced by 87% from 346,204 ppb to 41,976 ppb.

Operational Dry Cleaner

ISOTEC CASE STUDY 18

    Request Case Study

Site Location: NE Florida
Contamination: Trichloroethene (200 ppb); Tetrachloroethene (54 ppb); and Trans 1,2-Dichloroethene (42 ppb) in groundwater.
Geology: Undifferentiated sediments consisting of sand and shell with some clay and clay-rich layers; water table is at approximately 8-10 ft bgs.
Area Treated: 8,500 Sq. ft area at 5-40 ft bgs vertical depth interval.
Effectiveness:  All contaminants were treated to below applicable FDEP groundwater quality criteria (MCLs) throughout the site following ISOTEC pilot and full-scale treatment programs. A "Site Rehabilitation Completion Order" was issued.

Naval Air Station

ISOTEC CASE STUDY 20

    Request Case Study

Site Location: Southern CA
Contamination: Trichloroethene (96,000 ppb in groundwater).
Geology: Poorly sorted medium to fine grain sand; water table at approximately 20 ft bgs.
Area Treated: 1,250 Sq. ft - 3 treatment intervals, 20-30, 35-45, 50-60 ft bgs.
Effectiveness:  Overall 60% reduction in most heavily contaminated zone with one well showing 95% reduction.

Former Cosmetic Manufacturing Plant

ISOTEC CASE STUDY 22

    Request Case Study

Site Location: Central NJ
Contamination: Ethanol (354,943 ppb), Trichloroethene (31,162 ppb), Methylene Chloride (10,200 ppb), Trichlorofluoromethane (51,762 ppb) & 1,1,1-Trichloroethane (11,166 ppb).
Geology: Fractured bedrock aquifer. Water table is at approximately 14-25 ft bgs.
Area Treated: Treatment interval 20-70ft bgs for pilot. On going full scale is 100,000 sq ft and 20-70 ft bgs.
Effectiveness:  Site-wide total VOCs reduced by 93% from 108,380 ppb to 7,328 ppb. Site-wide Ethanol concentrations reduced by 99% from 354,943 ppb to 4,591 ppb.

Former Dry Cleaner

ISOTEC CASE STUDY 25

    Request Case Study

Site Location: NE Florida
Contamination: Trichloroethene (350 ppb); Tetrachloroethene (48 ppb); Vinyl Chloride (38 ppb); Cis-1,2 Dichloroethene (2,901 ppb);and Trans-1,2-Dichloroethene (146 ppb).
Geology: General shallow subsurface conditions at the site consist of very fine sands; water table at approximately 3 feet bgs.
Area Treated: 11,250 square feet at 3 to 20 feet bgs vertical depth interval.
Effectiveness:  90% reduction of total VOCs site wide. All concentrations reduced to below the FDEP natural attenuation default concentrations.

Active Dry Cleaner

ISOTEC CASE STUDY 26

    Request Case Study

Site Location: Atlanta, GA
Contamination: Average Concentrations: Trichloroethene (117 ug/l); Tetrachloroethene (1,444 ug/l); and Cis-1,2-Dichloroethene (100 ug/l).
Geology: Sands in the vadose and the saturated zones and fractured rock in the deeper zone. Depth to groundwater is ~18 ft bgs; hydraulic conductivity is 5.9 ft/day.
Area Treated: ~8,000 Sq. ft total area. Target treatment zone ranged from ~2-18 ft bgs (unsaturated zone), ~18-55 ft bgs (saturated zone), and up to 80 ft bgs (fractured rock).
Effectiveness:  GW: 83% reduction of total VOCs site-wide after 1st treatment event, which improved to 89% reduction (except MW-29) after 2nd treatment event. Soil: Treated to ND concentrations.

Former Industrial Facility

ISOTEC CASE STUDY 27

    Request Case Study

Site Location: Eatontown, NJ
Contamination: TCE, PCE, cis-1,2-DCE, BTEX, and PCBs. Average Concentrations: GW VOC (75,204 ug/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.

Naval Air Station

ISOTEC CASE STUDY 28

    Request Case Study

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 (141ug/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.

Former Manufacturing Facility

ISOTEC CASE STUDY 34

    Request Case Study

Site Location: Vancouver, Washington
Contamination: Average concentrations of TCE (1,387 ug/l) and PCE (3,267 ug/l)
Geology: Semi-confined sand
Area Treated: Source area and plume
Effectiveness:  Average TCE concentrations reduced by 98%, and average PCE concentrations reduced by 99%

Active Air Force Base

ISOTEC CASE STUDY 35

    Request Case Study

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%.

Active Air Force Base

ISOTEC CASE STUDY 36

    Request Case Study

Site Location: East Coast, United States
Contamination: Chlorinated VOCs including PCE, TCE, Vinyl Chloride and cis-1,2-DCE.
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 1.02 x 10 -2 cm/sec in the shallow water bearing unit. Depth to GW is approximately 15-20 feet bgs; with flow in the easterly direction.
Area Treated: Target treatment area was approximately 4,500 sq ft targeting the 20-35 feet bgs vertical interval.
Effectiveness:  Treatment program results indicated a sharp reduction in the concentration of VOCs, with overall site-wide contamination reduced by over 87% on average and over 92% in the treatment area.

Truck Maintenance Facility

ISOTEC CASE STUDY 39

    Request Case Study

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.

Former Metal Fabricating Facility

ISOTEC CASE STUDY 40

    Request Case Study

Site Location: Lakewood, Colorado
Contamination: TCE, PCE, 1,1-DCE, 1,1-DCA, 1,1,1-TCA.
Geology: Subsurface is comprised of fractured bedrock. The water table is approximately 3-15 ft bgs.
Area Treated: Target treatment area covered a bedrock well network using a 30-foot spacing grid targeting a 25-foot screened vertical interval.
Effectiveness:  Monitoring wells located within the treatment area have been sampled over a six-year period. Overall there has been an 82% reduction of 1,1-DCE and a 93% reduction of TCE. The facility received notification from the Colorado Department of Public Health and Environment (CDPHE) requiring no further remedial action.

Manufacturing Facility

ISOTEC CASE STUDY 41

    Request Case Study

Site Location: Southern, Colorado
Contamination: PCE.
Geology: Subsurface is comprised of sand and clay down to 30 feet bgs underlain by fractured shale. The water table is approximately 25 ft bgs.
Area Treated: Target treatment area covered an injection well network utilizing 30 injection points.
Effectiveness:  Following the injections, four gallons of separate-phase PCE was removed. This volume of PCE is equivalent to 8,000,000 gallons of groundwater at 5 µg/L or 2.4 years of groundwater pumping and treatment using existing systems at the site. An additional eight gallons of separate-phase PCE was oxidized.

Former Dry Cleaner

ISOTEC CASE STUDY 42

    Request Case Study

Site Location: Denver, Colorado
Contamination: PCE (3,267 µg/L) and TCE (1,542 µg/L).
Geology: Approximately 3 feet of permeable sand and gravel situated on top of siltstone bedrock and overlain by clay. Siltstone at 10-15 feet bgs. Clay at 0-9 feet bgs. The groundwater at the site appears to be confined to the permeable zone overlying the siltstone.
Area Treated: Phase I treatment targeted the source area (15-foot spacing) while Phase II treatments targeted the entire plume (30-foot spacing).
Effectiveness:  Following quarterly sampling events conducted over a 1-year time frame, both PCE and TCE were reduced by greater than 99%.

Former Reprocessing Facility

ISOTEC CASE STUDY 43

    Request Case Study

Site Location: South Florida (Superfund Site)
Contamination: TCE (20,000 µg/L in GW; 5,200 mg/kg in soil) and TCA (15,000 µg/L in GW; 3,200 mg/kg in soil). DNAPL present at some locations.
Geology: Oolitic limestone, oolitic & quartz-grain sandstone, and wackestone. Depth to GW approximately 8-10 feet bgs.
Area Treated: Target treatment area covered an injection well network utilizing 8 nested well injection points targeting four depth intervals (20-30 feet bgs, 30-40, 40-50 and 50-60 feet bgs).
Effectiveness:  TCE and TCA in soils reduced by 86% and 94%, respectively. TCE and TCA in groundwater reduced by 97% and 98%, respectively.

Chemical Depot

ISOTEC CASE STUDY 46

    Request Case Study

Site Location: Pueblo, Colorado
Contamination: TCE and cis-1,2-DCE.
Geology: Interbedded fine-to-coarse grained sand and gravel from 0-40 feet bgs, underlain by shale bedrock.
Area Treated: Source area treatment covering an injection point network consisting of three injection wells targeting the vertical interval between 27-36.6 feet bgs.
Effectiveness:  TCE and cis-DCE in GW reduced by 93% and 97%, respectively. Third pilot program injection event was cancelled due to successful results achieved after the first two events.

Vanderberg Air Force Base

ISOTEC CASE STUDY 54

    Request Case Study

Site Location: California
Contamination: TCE impacted groundwater.
Geology: Subsurface is compromised of homogenous sands with a few thin silt and clay lenses to a depth of approximately 22 feet bgs, underlain by a clay layer. Depth to GW is approximately 11 feet bgs.
Area Treated: Target treatment area was approximately 10,000 sq. feet targeting the 12-16 and 16-21 feet bgs depth intervals.
Effectiveness:  Average TCE concentrations were reduced by 87% throughout the site with one location showing a >99% reduction.

Active Military Base

ISOTEC CASE STUDY 58

    Request Case Study

Site Location: Virginia
Contamination: 1,1-DCA; 1,2-DCB; 1,4-DCB; 1,1-DCE; 1,1,1-TCA; 1,2,4-TCB; TCE and VC. Total VOCs as high as 51,095 ug/l in MW-2.
Geology: Upper layer consisting of a mixture of very fine silty clay, clayey sands and sandy clay underlined by a mostly sand unit. A third layer consisting mostly of clay served as a confining layer. Average hydraulic conductivity was 4.8 x 10-3 ft/min. Depth of water approximately 1-4 feet bgs.
Area Treated: Approximately 20,000 sq. feet targeting 11-19 ft. bgs depth interval.
Effectiveness:  Treatment program results indicated a sharp reduction in VOCs, in four out of the six monitoring wells with reductions ranging from 55-93%. Most significant reduction was noted in MW-2 which went from a baseline value of 51,095 ug/l to 4,017 ug/l, a 92% reduction.

Former Waste Pit Disposal Site

ISOTEC CASE STUDY 59

    Request Case Study

Site Location: Western Coast of Denmark
Contamination: PCE; TCE; TPH; Benzene, Toluene and Xylenes (BTX); anilines; sulfonamides and barbiturates. Significant amount of COCs exist as DNAPLs. Average PCE soil concentration in Layer 2.1 was 3,100 mg/kg and about 280 mg/kg in Layer 2.2.
Geology: Fine sands from ground surface to 3.5 mbgs (Layer 2.1), underlain by Layer 2.2 from 3.5-15 mbgs consisting of sands and gravel. Depth to water approximately 3-4 mbgs.
Area Treated: 8m x 8m test cell area (Pit 1) consisting of Layer 2.1 (3-6 mgbs) and Layer 2.2 (6-9 mbgs).
Effectiveness:  Post treatment pilot study results indicated significant reduction in overall mass was achieved in both Layers 2.1 and 2.2.

Former Manufacturing Facility

ISOTEC CASE STUDY 65

    Request Case Study

Site Location: Northern Wisconsin
Contamination: TCE soil levels as high as 140,000 ug/kg
Geology: Site geology consists of mostly clay from 0-15 feet bgs underlain by a mostly sand unit from 15-30 feet bgs. Depth to water is approximately 25-30 feet bgs.
Area Treated: ~13,500 sq ft area from 0-15 ft bgs within the upper clay unit and ~11,700 sq ft area from 15-30 ft bgs within the lower sand unit.
Effectiveness:  Post-treatment verification sampling data confirmed that 36 of 37 samples collected were below the remediation target goal of 1.5 mg/kg.

Former Manufacturing Facility

ISOTEC CASE STUDY 66

    Request Case Study

Site Location: Central New Jersey
Contamination: 1,1,1-TCA, 1,2-DCB, PCE, TCE, Ethylbenzene & Total Xylenes. Total VOCs as high as 32,407 mg/kg.
Geology: Site geology consists of mostly silts with layers of fine to coarse sands. Depth to water is approximately 13-15 feet bgs. GW flow is to the southwest.
Area Treated: ~480 sq. ft area from 17-25 ft bgs within the saturated zone (142 cubic yards).
Effectiveness:  Post-treatment samples are scheduled to be collected by the client in the next few months.

O&G Superfund Drum Reconditioning Site

ISOTEC CASE STUDY 67

    Request Case Study

Site Location: Kingston, New Hampshire
Contamination: VOCs, primarily – BTEX, PCE, TCE, 1,1-DCA, & 1,4-Dioxane. VOC levels as high as 20,000 ug/l.
Geology: Site geology consists of fine to medium sand, some silt, and trace gravel with bedrock encountered at ~18-35 ft bgs. Depth to water is approximately 3-6 ft bgs with flow in the southeastern direction.
Area Treated: Two treatment areas; Area A (~17,400sq. ft) & Area B (~1,800 sq. ft)
Effectiveness:  No further injections are scheduled to take place at the site.

Former Manufacturing Facility

ISOTEC CASE STUDY 68

    Request Case Study

Site Location: Western Massachusetts
Contamination: PCE, TCE, cis-1,2-DCE and VC. PCE concentrations as high as 53,000 ug/l.
Geology: Site geology consists of very fine sand with intervals of silt. Depth to water is approximately 9-11 feet bgs. GW flow is from west to east.
Area Treated: ~800 sq. ft area from 10-20 ft bgs within the saturated zone (296 cubic yards).
Effectiveness:  Post-treatment samples collected from the 3 temporary wells showed concentrations ranging from 2,900-3,600 ug/l which were all below the performance criteria of 15,000 ug/l set forth for the site. No further remediation work is planned for the site.