The Use of a Gas Vapor Barrier to Mitigate Subsurface Vapor Intrusion What Is A GAS VAPOR BARRIER? An impermeable, chemically resistant membrane that prevents gas vapor intrusion into buildings 1
Who Uses A GAS VAPOR BARRIER? Large Box Stores Restaurants Schools Residential Fire Stations Retail Centers Hospitals When Is A GAS VAPOR BARRIER Required Or Necessary? Former Manufacturing Facilities, MGP, Gas Station, Dry Cleaner, Tank Farm, and Landfill Sites Former Manufacturing Facility Former Gas Station Former Landfill Former Dry Cleaner Former MGP Site Former Tank Farm 2
Important Physical Properties Of A Membrane Chemical Resistance Testing: -Permeability Methane Gas Hydrogen Sulfide gas permeability Benzene, Toulene, Ethylene, Xylene, Gasoline, Hexane, Perchloroethylene Sodium sulfate (2% water solution) Acid exposure (10% H2SO4 for 90 days) -Weight Change -Diffusion Strength Tests: -Bonded Seam Strength Test -Dead Load Seam Strength Test Aging Tests: -Heat Aging -Soil Burial Coefficient of Friction Test: -Coefficient of Friction (geotextile both sides) Adhesion Tests: -Tensile Bond Strength to Concrete Temperature Considerations: -Cold Bend Test -Freeze Thaw Resistance (100 cycles) ASTM 1434-82 ASTM D1434 ASTM D543, D412, D1434 ASTM D543, D412, D1434 ASTM D543, D412, D143 ASTM D543 ASTM D6392 City of Los Angeles ASTM D4068-88 ASTM E154-88 ASTM D5321 ASTM D413 ASTM D146 ASTM A742 Types Of GAS VAPOR MEMBRANES Fluid Applied: (LIQUID BOOT ) Sheet Membrane: (HDPE) 40-60 mil High Density Polyethelene LIQUID BOOT HDPE SPRAY-APPLIED MEMBRANE SHEET-APPLIED MEMBRANE 3
Constructability Of HDPE Under Buildings Seaming Batten Strip Attachment Strip Batten Strip Spray-Applied GAS VAPOR MEMBRANE Costco-Ocean Township, New Jersey 4
Spraying Onto Geotextile Target-Farmingdale, New York Creating A Monolithic Membrane Genzyme Office HQ-Cambridge, Massachusetts 5
Pile Cap/Attachment Detail Creating A Monolithic Membrane Genzyme Office HQ-Cambridge, Massachusetts 6
Attaching to Vertical Surfaces Milwaukee Ferry Terminal-Milwaukee, Wisconsin Vertical Attachment Ferry Express Terminal-Milwaukee, Wisconsin 7
Sealing Penetrations Colony Park High School-Corona, California Penetration Detail 8
Sealing Penetrations Milwaukee Ferry Terminal-Milwaukee, Wisconsin Protection Course Riker s Island-New York, NY 9
Installation of Steel Over Membrane and Protection Course Doma Lofts-San Diego, California Quality Assurance Visual Inspection Mil thickness Smoke Testing Detecting the Undetectable 10
Smoke Testing Procedure Set-Up Of Smoke Testing Equipment Smoke Testing Procedure 11
Smoke Testing Procedure Puncture Detected in Membrane Smoke Testing Procedure Puncture in Membrane Sealed 12
Smoke Testing Procedure Repaired Puncture Finished Quality Assurance 13
Mitigating Landfill Gas & Settlement Typical Landfill Redevelopment Home Depot at Walker s Brook-Reading Massachusetts 14
HDPE Mitigating Soil Settlement HDPE T-Lock system Subgrade Geotextile Fabric T-lock System Structural Slab LIQUID BOOT Mitigating Soil Settlement LIQUID BOOT System Subgrade Typar Geotextile Void LIQUID BOOT UltraShield G-1000 Structural Slab System Bond Strength To Concrete = 7 PSI 15
GeoVent System Gas Collection and Extraction Venting GeoVent System Wendy s Restaurant-Chicago, Illinois 16
GeoVent System Public Storage-Salem, Massachusetts GeoVent System 17
GeoVent Connection to Vent Riser Project Profiles 18
Project Profile Wa Wa Grocery Store - Philadelphia, PA Project Profile Lowe s Home Improvement Store-Ocean Township, New Jersey 19
Project Profile Droyers Point-Jersey City, New Jersey Project Profile Droyers Point-Jersey City, New Jersey 20
Project Profile Droyers Point-Jersey City, New Jersey Project Profile Droyers Point-Jersey City, New Jersey 21
Project Profile Walker s Brook Reading, Massachusetts Project Profile 1 st Avenue School- Newark, NJ 22
Project Profile Queens Vocational School-Queens, New York Project Profile-Adaptive Reuse Project Newton Courthouse-Newton, Massachusetts 23
Project Profile-Adaptive Reuse Project Belgravia Redevelopment-South Haven, Michigan Spray-Applied GAS VAPOR MEMBRANE Methane Specialists, Camarillo, CA Cedars Sinai Hospital Central Plant-Los Angeles, CA 24
Project Profile Los Angeles Central Library-Los Angeles, California Project Profile LA LIVE! PRESENTS: Nokia Theatre- Los Angeles 25
Project Profile Orsini Phase II Los Angeles, CA Example of Properly Designed Membrane & Venting System 26