These drawings were scanned from the EPA mitigation manual. They may provide some assistance in understanding and designing radon gas mitigation systems. If you print them out, you should set your printer up so that they fill a whole page.

INDEX OF DRAWINGS:
• Fig 0 (~100kb): Cover of Technical Guidance Manual
• Fig 1 (~100kb): Sub-slab depressurization (SSD) using pipes inserted down through the slab from indoors. (Typical retrofit system)
• Fig 2 (~100kb): Sub-slab depressurization (SSD) using pipes inserted horizontally through the foundation wall from outdoors.
• Fig 3 (~100kb): Drain-tile depressurization (DTD) where the tiles drain to a sump in the basement.
• Fig 4 (~100kb): Drain-tile depressurization (DTD) where the tiles drain to an above-grade discharge remote from the house.
• Fig 5 (~100kb): Block-wall depressurization (BWD) using the individual-pipe approach.
• Fig 6 (~100kb): Sub-membrane depressurization (SMD) for the case where individual suction pipes penetrate the membrane.
• Fig 7 (~100kb): Sub-membrane depressurization (SMD) for the case where suction is drawn on perforated piping beneath the membrane (DTD analogue).
• Fig 20 (~100kb): One representative SSD piping configuration illustrating an interior exhaust stack. (Typical new construction system)
• Fig 21 (~100kb): One representative SSD piping configuration illustrating an exterior exhaust stack. (Typical retrofit system)
• Fig 23 (~100kb): A representative method for mounting a fan in the attic above an interior stack.
• Fig 27 (~100kb): A representative method for mounting an exterior fan at the base of an exterior stack.

For further radon gas assistance, call Infiltec at (540) 943-2776 weekdays 7 AM to 4 PM ET, or emailL: Infiltec Factory .