STATE OF ALASKA

Telephone (907) 269-0767

State of Alaska Highway and Public Works Departments have used Perma Zyme since 1982.

Perma Zyme is used on State of Alaska highway systems (principal and secondary roads, timber, and ore hauling roads) with a total estimated length of roads over 500 km.

Perma Zyme is used on airport runways for general and commercial aviation, with estimate total length of 2800 meters.

Perma-Zyme is used as containment sealant for water reservoirs related to road and highway construction (volume of reservoirs varies from 100m3 to 500 m3.)

Perma Zyme is used in Alaska regions with permafrost with no impact on road performance. Temperature range in the regions of Perma Zyme use ranges from 26C to -40C with no effect on the road surface constructed with Perma Zyme. Water adsorption effectively near zero (permeability is less than 1x10-6 cm/sec.) Essentially no effect from freeze-thaw cycles on roads constructed with Perma-Zyme .

Loads transported on Perma-Zyme constructed roads range from 9,000 to 13,000 kg per wheel.

STATE OF UTAH

Road Supervisor

Telephone (801) 381-5450

State of Utah Road Department has used Perma Zyme since 1983.

Perma Zyme principal uses on secondary roads and for mineral ores and timber hauling roads with total estimated length of roads over 800 km.

Perma Zyme is used as a containment sealant for mining leach pods.

Significant portion of the secondary roads have gradient in excess of 20 percent, in elevation of ranges from 1,200 to 4,200 m, with no effect on roads constructed with Perma Zyme .

Temperature range in regions with Perma Zyme constructed roads range from 38C to-34C, with no effect on the road surface constructed with Perma Zyme .

Precipitation (water and snow) has very minimal impact on roads constructed with Perma Zyme . Mineral ore loads transported on hauling roads constructed with Perma Zyme range from 9,000 kg to 13,000 kg per wheel.Portion of ore hauling roads constructed with Perma Zyme have gradient of over 20 percent in elevations over 4,200 m, with no impact on the road stability.

Essentially no effect from freeze - thaw cycles on roads constructed with Perma Zyme .

STATE OF MISSOURI

Superintendent Street Dept

Telephone (816) 331-2377

State of Missouri has used Perma Zyme since 1983.

Perma Zyme is used on farm product delivery and secondary roads withtotal length of roadway estimated at 600 km.

Perma Zyme is extensively used as containment sealant for water reservoirs and livestock waste holding reservoirs.

Perma Zyme constructed roads are located in relatively flat terrain with temperature ranges 32C to -23C.

STATE OF CALIFORNIA, SAN DIEGO COUNTY

Fred Villanueva, Director San Diego County Road Dept.

Telephone (619) 670-9808

San Diego County has used Perma Zyme since 1991.

Perma Zyme is used as secondary roads in semi-desert regions of San Diego County , with total estimated length of roads approximately 600 km. Temperature range of the regions Perma Zyme use ranges 5C to 26C.

STATE OF PENNSYLVANIA

Director Pennsylvania Department of Transportation.

Telephone (814) 445-7905

State of Pennsylvania has used Perma Zyme since 1989.

Perma Zyme is used on State of Pennsylvania highway system principally on farm product delivery and secondary roads; with total estimated length of 700 km.

No effect from freeze-thaw cycles on roads constructed with Perma Zyme