Sutter Homes Winery Ponds Agricultural Water Ponds 2009 Project Project Summary The design specifications for this project stipulated that there shall be zero leakage through the pond liner system. These were double lined ponds with a leak collection system between the primary and secondary geomembrane. Secondary geomembrane was 40 mil smooth HDPE (manufactured by GSE) and this was leak tested with the water puddle method after completed installation. The Leak collection layer consisted of a 200 mil HDPE geonet. The Primary geomembrane was a GSE 60 mil smooth conductive HDPE geomembrane . At the completion of installation the conductive geomembrane was spark tested in its entirety including under the seam laps. All areas of question were repaired. The pipes penetrating the liner system were detailed with bootless pipe penetrations manufactured in D & E's fabrication facility. After filling the ponds with wastewater from the winery, it was determined that the standard pocket vents installed at the top of the slopes were allowing liquid to enter the leak detection layer as a result of wave action. These vents were replaced with a D & E designed "smoke stack vent". Four ponds have been installed and all have no detectable liquid collecting in the leak detection system. Client: Sutter Homes Winery City: Lodi County: San Joaquin County State: CA Project Type: Agricultural Water Ponds Project Size: 186,572 Material Types: 186,572 SF 60 mil conductive HDPE (High Denensity Polyethylene) geomembrane 186,572 SF 200 mil HDPE (High Denensity Polyethylene) geonet 186,572 SF 60 mil HDPE (High Denensity Polyethylene) geomembrane Bootless Pipe Penetrations and Vent details

Del Webb WWTP Waste Water Ponds 2010 Project Client: Del Webb State: CA Project Type: Waste Water Ponds Project Size: 148,649 Material Types: 148,649 SF 60 mil conductive liner 148,649 SF 200 mil geonet 148,649 SF 60 mil textured HDPE - High Denensity Polyethylene Bootless Pipe Penetrations

Westlake Farms Concrete Protection Liners (CPL) GSE Studliner 2011 Project Client: Westlake Farms, Inc. Composting Facility City: Stratford County: Kings County State: CA Project Type: Concrete Protection Liners (CPL) Project Size: 38,974 Material Types: GSE HDPE StudLiner Concrete Protection Liner

Cummings Road LF Phase 1 Landfills: Caps 2012 Project Client: Humboldt Waste Management Authority City: Eureka County: Humboldt County State: CA Project Type: Landfills: Caps Project Size: 1,057,200 Material Types: 1,057,200 SF 60 Mil LLDPE Super Gripnet 1,057,200 SF 8 oz. Geotextile

Jamestown Landfill Landfills: Caps 2008 Project Client: Waste Management of Tuolumne County City: Jamestown County: Tuolumne County State: CA Project Type: Landfills: Caps Project Size: 813,068 Material Types: 813,068 SF LLDPE - Linear Low-Density Polyethylene 813,068 SF Geocomposite 813,068 SF Geotextile

Rock Creek Landfill Landfills: Caps 2011 Project Client: Calaveras County Department of Public Works City: Farmington County: Calaveras County State: CA Project Type: Landfills: Caps Project Size: 443,400 Material Types: 443,400 SF LLDPE (Linear Low-Density Polyethylene) Geomembrane 443,400 SF Geocomposite

Clean Harbors WMU 35 and Expansion Landfills: Hazardous Waste 2009 Project 2013 Project Client: Clean Harbors Environmental Services City: Buttonwillow County: Kern County State: CA Project Type: Landfills: Hazardous Waste Project Size: 2009: 970,0002013: 1,080,141 Material Types: 2009 276,500 SF GCL - Geosynthetic Clay Liner 918,000 SF Geocomposite 970,000 SF 80 Mil HDPE (High Denensity Polyethylene) Geomembrane 2013 354,777 SF GCL - Geosynthetic Clay Liner 1,080,141 SF HDPE - High Denensity Polyethylene 16,720 SF Geotextile 1,033,624 SF Geocomposite

American Avenue Landfill Landfills: Municipal Solid Waste Cells 2006 Project Client: Public Works & Planning Fresno County City: Fresno County: Fresno County State: CA Project Type: Landfills: Municipal Solid Waste Cells Project Size: 1,380,000 Material Types: 1,380,000 SF HDPE - High Denensity Polyethylene 1,330,000 SF Geocomposite 1,370,000 SF GCL - Geosynthetic Clay Liner

Bena Landfill Landfills: Municipal Solid Waste Cells 2007 Project Client: Kern County Waste Management City: Bakersfield County: Kern County State: CA Project Type: Landfills: Municipal Solid Waste Cells Project Size: 1,205,100 Material Types: 1,205,100 SF 60 Mil DST HDPE (High Denensity Polyethylene) Geomembrane 472,500 SF 60 Mil SST HDPE (High Denensity Polyethylene) Geomembrane

Bena Landfill Landfills: Municipal Solid Waste Cells 2011 Project Client: Kern County Waste Management City: Bakersfield County: Kern County State: CA Project Type: Landfills: Municipal Solid Waste Cells Project Size: 982,300 Material Types: 300 SF 60 Mil Geomembrane 981,500 SF GCL - Geosynthetic Clay Liner 982,300 SF 40 Mil HDPE - High Denensity Polyethylene 973,900 SF 8oz. Geotextile 981,500 10 oz. Geotextile