CASE STUDIES

Bioremediation Projects

Overall Soil Treatment Process:  Advanced biological, mechanical & chemical treatment of contaminated soil via microenfractionation® using the Microenfractionator® in conjunction with H&H biologicals and chemical amendments in a windrow type compost configuration.

Job Identification Time Line Soil Treated Contaminant Treated Contaminant Level Success Indicators (Reduced to:)
Woodburn, OR. UST Site #24-91-4347 386 days (exp. site)* 200 cubic yards Clay w/silt Used Motor Oil 39,000 mg/kg 380 mg/kg* TPH-D-EXT Target: 500 mg/kg
Bremerton, WA UB 1-7-9 (school site) 67 days 400 cubic yards Silt/clay & 63% fines #2 heating oil 2,400 mg/kg 110 mg/kg TPH-D
Bremerton, WA UB 2 (school site) 67 days 400 cubic yards silt/clay/63% fines #2 heating oil 2,400 mg/kg 53 mg/kg TPH-D
Olympia, WA 9335 44 days 170 cubic yards silt/clay/87% fines Used Motor Oil 1,500 mg/kg 130 mg/kg TPH-D-EXT Target: 200 mg/kg
Olympia, WA 9335 44 days 1,200 cubic yards silt/clay/87% fines Weathered gasoline 3,000-6,000 mg/kg w/hot spots to 39,000mg/kg essentially "non-detect Target: 200 mg/kg TPH-G
Cle Elem, WA DNR 9311A 7 days 80 cubic yards sand/gravel Diesel 530 mg/kg 20 mg/kg TPH-D
Cle Elem, WA DNR 9311B 7 days 120 cubic yards sand/gravel Creosote 1,000 mg/kg TPH <5 mg/kg TPH-D-EXT
Cle Elem, WA DNR 9311C 7 days 120 cubic yards sand/gravel Pentachlorophenol (PCP) 87 mg/kg 9.5 mg/kg PCP
Powers, OR Georgia Pacific 90 days 160 cubic yards classifying required Diesel 1,500 mg/kg <100 mg/kg TPH-D
Vashon Island, WA 9364 33 days 170 cubic yards silt/w/sand Gasoline 1,333 mg/kg high of 2,400 mg/kg 2.8 mg/kg TPH-G
Kent, WA Budget Truck Rental A 18 days 590 cubic yards silt w/sand & cobbles Gasoline 1,500 mg/kg <2 mg/kg TPH-G
Kent, WA Budget Truck Rental B 17 days 1,225 cubic yards silt w/sand & cobbles Gasoline 3,000 mg/kg 4 mg/kg TPH-G
Kent, WA Budget Truck Rental C 10 days 3,500 cubic yards silt w/sand & cobbles Gasoline 3,000 mg/kg 8 mg/kg TPH-G
WA Site in King Co. 149 days 6,000 cubic yards Oil/grease impacted 1,720 mg/kg TPH w/high up to 4100 mg/kg 373 mg/kg TPH
Osceola, WI Former USAF station 194 days 1,100 cubic yards PVOC's, PAH's & Lead 1,100-3,400 mg/kg diesel, BTEX level from 500-1500 mg/kg lead levels 5mg/kg <50mg/kg (diesel and BTEX) reduced PAH levels 50% lead unchanged
Medford, OR 29 days 4,512 cubic yards Diesel 2,000 mg/kg 178 mg/kg TPH-D Target: 500mg/kg
Alaska 12 days 190 cubic yards Diesel/gasoline 413 mg/kg (diesel) 305mg/kg (gas) 72 mg/kg (diesel) target: 200mg/kg benzene "non-detect" GRO <10mg/kg target: 100mg/kg
Kenai, AK (airport fuel service) 70 days 160 cubic yards Diesel 1,330 mg/kg 160 mg/kg DRO target: 200mg/kg (level B)
Camp Pendleton, CA 71 days 615 cubic yards Jet Fuel 1800 mg/kg TPH 76 mg/kg TPH met "clean requirments"
Jones County, MS 90 days 20,000 cubic yards Crude Oil 20,000 mg/kg 750 mg/kg TPH; target: 500 mg/kg
Huntington Beach, CA 134 days 3,000 cubic yards Light Crude Oil 6,600 mg/kg Less than 1,000 mg/kg
Panama, OK 48 days 500 cubic yards Creosote and PCP PAHs 3,000 mg/kg PCP 210 mg/kg 95% PAH removal and <100 mg/kg PCP
Savannah River Site, Aiken SC 100 days 1,200 cubic yards PCBs, DDT, DDE, DDD, Endrin, Heptachlor, and Silvex Up to 20,000 µg/kg Less than 1,000 µg/kg
*This was a research project to determine if relatively high levels of high molecular weight hydrocarbons will lend themselves to bioremediation.

Chemical Treatment Projects

Overall Soil Treatment Process: Treatment involves microenfractionation® using the H&H Eco Systems Microenfractionator® , adding and microenfractionating an oxidation catalyst into the soil, then microenfractionating again after the addition of a chemical oxidant in a windrow type compost configuration.

Job Identification Time Line Amt./Type Soil Treated Contaminant Treated Contaminant Level (avg.) Success Indicators (Reduced to=)
Ridgefield, WA Soil Field Test A 6 days 50 cubic yards fine gravel/rock w/silt Cresote/Diesel 2,000 mg/kg 280 mg/kg in 20hrs 140mg/kg in 6 days Target: 200 mg/kg
Ridgefield, WA Soil Field Test B 6 days 50 cubic yards fine gravel/rock w/silt Pentachlorophenol (PCP) 68 mg/kg 22 mg/kg in 20hrs 7.8 mg/kg in 6 days Target: 8.3 mg/kg
Ft. Bragg, CA Feasibility Study/In-house lab 3 days 30 gallons (feasibility study) Pentachlorophenol (PCP) 1,100 mg/kg 51.5 mg/kg
Olympia, WA Soil field Test/chlorodane 6 days* 75 cubic yards fine silt/clay Chlordane 23,000 mg/kg 4,000 mg/kg*
Olympia, WA Soil field Test/Heptachlor 6 days* 75 cubic yards fine silt/clay Heptachlor 28,000 mg/kg 13,000 mg/kg*
Los Alamos National Laboratories 28 days 900 kg (on-site feasibility study) TNT and RDX (high energy explosives) 900 mg/kg TNT 13,000 mg/kg RDX

<10 mg/kg
TNT <200 mg/kg
New Brighton, MN ?? 1,200 cubic yards ??? Carcinogenic PAH's and PCP ?? mg/kg cPAHs
?? mg/kg PCP		 cPAHs ??
<100 mg/kg PCP
Brooklyn Ctr., MN 166 days 1,190 cubic yards fine grained w/ high levels of organic matter Pentachlorophenol (PCP) 160 mg/kg Reduced from 160 mg/kg to 24 mg/kg in 30 days;then reduced to 4.8 mg/kg by 4/13/98 Target: 150 mg/kg
Brooklyn Ctr., MN 2 days 1,190 cubic yards fine grained w/high levels of organic matter C-PAH compounds associated w/creosote 258 mg/kg Reduced from  to 60.15 mg/kg in 48 hours; contaminant level dropped to 52.7 mg/kg by 10-12-98 Target: 100 mg/kg
*Further treatment on these sites delayed by weather.

Fixation Projects

Overall Soil Treatment Process:  A chemical additive is blended into the soil and the moisture is maintained at an optimal content.  These additives are typically a sulfate or phosphate based chemical that binds to metals and causes them to salt out.  Another treatment involves manipulating the pH, which can help maintain the metal in an insoluble form. 

Job Identification Time Line Soil Treated Contaminant Treated Contaminant Level Success Indicators (Reduced to:)
Vancouver, WA 3 days 300 cubic yards Lead Up to 1,500 mg/kg <10 mg/kg leachable
St. Charles, MO 7 days 2,250 cubic yards Lead Up to 202 mg/kg <5 mg/kg, down to 1 mg/kg
Tijuana, Mexico 1 week 300 cubic yards Lead Up to 224,000 mg/kg total lead Reduced leachability to <1 mg/kg