PASSIVE RADON CONTROL SYSTEM IN
          CRAWL SPACE FOR NEW  CONSTRUCTION

          NOTES:
          1.  WSTALL A LENGTH OF 3" OR 4" DIAMETER PERFORATED DRAIN
             TILE HORIZONTALLY BENEATH THE  SHEETNG AND CONNECT
             TO THE "T" FITTWG WITH THE VERTICAL STANOWE THROUGH
             THE SOIL-GAS-RETARDER MEMBRANE.  THIS HORIZONTAL PPE
             SHOULD NORMALLY BE PLACED PARALLEL TO THE LONG
             DIMENSION OF  THE HOUSE AND SHOULD EXTEND NO CLOSER
             THAN 6 FEET  TO THE FOUNDATION WALL.

          2. VENTILATE CRAWLSPACES IN CONFORMANCE WITH
             LOCAL  COOES: VENTS SHALL BE OPEN TO THE
             EXTERIOR  AND BE OF NONCLOSEABLE  DESIGN.
          3. CIRCUITS SHOULD  BE  A MINIMUM 15  AMP, 115 VOLT.
               EXHAUST CIO'FROM  OPENINGS WTO
                       CONDITIONED SPACES OF BUILDING)
                      12" MIN. ABOVE ROOF
i
                                         INTERIOR PARTITION

                                     LIVING AREA
                                          SEAL  AROUND
                                          FLOOR PENETRATIONS
                                                                                            SUPPORT
                                                                                            STRAPPING
                                      CAP BLOCK OR OTHER SEAL
                                      ON HOLLOW  BLOCK WALLS
CRAWL  SPACE
NOTE 2
                               ELECTRICAL JUNCTION BOX
                               FOR FUTURE INSTALLATION
                               OF VENT FAN: NOTE 3.

                            ELECTRICAL JUNCTION BOX
                            FOR FUTURE NSTALLATION
                            OF WARNING DEVICE: NOTE 3.
             GRADE
             LEVEL
SOIL-GAS-RETARDER MEMBRANE  SEALED AGAINST
WALL AND AROUND PENETRATIONS (MIN. 6-MIL
POLYETHYLENE SHEETING OR EQUIVALENT)

PERFORATED DRAIN
TILE: NOTE 1
3"-4" DIA. VENT
(PVC OR EQUIVALENT)

SEAL MEMBRANE AROUND
RPE PENETRATION
                         ADJOINING SHEETS OF
                         MEMBRANE OVERLAPPED
                         AND SEALED	,

                                                                                         PVC T-FHPTING (OR EQUIVALENT)
                                                                                         TO SUPPORT  VENT PIPE

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 PASSIVE SUB-SLAB DEPRESSURtZATtON RADON
 CONTROL SYSTEM  FOR NEW  CONSTRUCTION

 NOTES:
 t ALL CONCRETE SLABS THAT COME IN CONTACT WITH THE GROUND SHALL
   BE LAID OVER A GAS PERMEABLE MATERIAL MADE UP OF EITHER  A MWIMUM
   4" THICK UNIFORM LAYER OF CLEAN AGGREGATE. OR A MINIMUM 4" THKX
   UNIFORM LAYER OF SAND. OVERLAIN BY A LAYER OR STRPS OF  MANUFACTUREO
   MATTING DESIGNED TO ALLOW THE LATERAL FLOW  OF SOIL GASES.

2. ALL CONCRETE FLOOR SLABS SHALL BE DESIGNED  AND CONSTRUCTED
   IN ACCORDANCE WITH LOCAL BUILDING COOES. ADDITIONAL REFS=
   AMERICAN CONCRETE INSTITUTE PUBLICATIONS. "ACI302.1R" fc
   "ACI332R". OR THE POST TENSIONING NSTITUTE MANUAL. "DESIGN
   AND CONSTRUCTION OF POST-TENSIONED SLABS ON GROUND".

3. ALL OPENINGS. GAPS  AND JOINTS IN FLOOR AND WALL ASSEMBLIES IN
   CONTACT SOIL OR GAPS AROUND PPES. TOILETS. BATHTUBS OR
   DRAINS PENETRATING THESE ASSEMBLES SHALL BE  FtLEO  OR  CLOSED
   WITH MATERIALS  THAT PROVOE  A PERMANENT AIR-TIGHT SEAL. SEAL
   LARGE  OPENINGS WITH NON-SHRINK MORTAR. GROUTS OR EXPANDING
   FOAM  MATERIALS AND SMALLER  GAPS WITH AN ELASTOMERIC JOINT
   SEALANT. AS  DEFINED IN ASTM C920-87.

4. VENT  PIPES  SHALL BE INSTALLED SO THAT ANY RAINWATER OR
   CONDENSATION DRAINS DOWNWARD WTO THE GROUND BENEATH THE
   SLAB OR SOIL-GAS-RETARDER MEMBRANE.

5. CIRCUITS SHOULD  BE A MINIMUM  15 AMP. 115 VOLT.
                                           EXHAUST 
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 ADDITIONAL COMPONENTS  REQUIRED FOR ACTIVATION
 OF PASSIVE SUB-SLAB  DEPRESSURIZATION  OR
 CRAWLSPACE RADON CONTROL SYSTEM

 NOTES:
 1.  WSTALL THE VENT  FAN IN THE VERTICAL RUN OF THE VENT PIPE.
   THE SIZE AND AIR MOVEMENT CAPACITY OF THE VENT FAN SHALL
   BE SUFFICIENT TO CREATE AND MAINTAIN A PRESSURE FIELD
   BENEATH THE SLAB OR CRAWLSPACE  MEMBRANE  THAT IS LOWER
   THAN  THE PRESSURE ABOVE THE SLAB OR  MEMBRANE.

2.  ALL POSITIVELY PRESSURED PORTIONS OF THE VENT PIPE AND
   FAN SHALL BE LOCATED OUTSIDE  THE HABITABLE SPACE
   THE BUILDING.

3.  PROVIDE A VISIBLE  OR AUDIBLE WARNING  SYSTEM TO
   ALERT  THE BUILDING OCCUPANT IF  THERE IS A LOSS
   OF PRESSURE OR AIR FLOW IN THE VENT PIPE.
EXHAUST <10'FROM OPENINGS INTO
        CONDITIONED SPACES' OF BUILDING)
      12" MIN. ABOVE ROOF
             FAN  COUPLING TO  PIPE

                    ROOF BRACE
                                                  FAN; NOTE  1
                                                  & NOTE 2
                                                                                       ELECTRICAL
                                                                                       JUNCTION BOX
                                  LIVING  AREA
                                                                                 SYSTEM FAILURE
                                                                                 DEVICE: NOTE 3.
                               INTERIOR PARTITION

                           FLOORING

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