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PDFWAC 296-155-20307

Confined space work on sewer systems under construction.

New systems under construction or new installations which have not yet been connected to a used system, may substitute forced ventilation for the testing requirements of chapter 296-809 WAC provided:
(1) Ventilation is effectively provided at least 5 minutes prior to entry into the confined space;
(2) Ventilation is provided, as required by WAC 296-62-13610, et seq., which supplies a continuous flow of air;
(3) Ventilation exhaust is discharged so as to present no hazard to other employees;
(4) An attendant is provided at the surface when there are employees in the manhole or pipe. The attendant must not leave the manhole unattended until such time as all employees are out and the cover has been replaced; and
(5) All other requirements for confined spaces are observed. See chapter 296-809 WAC.
[Statutory Authority: RCW 49.17.010, 49.17.040, 49.17.050, 49.17.060. WSR 16-09-085, § 296-155-20307, filed 4/19/16, effective 5/20/16. Statutory Authority: Chapter 49.17 RCW. WSR 94-15-096 (Order 94-07), § 296-155-20307, filed 7/20/94, effective 9/20/94. Statutory Authority: RCW 49.17.040 and 49.17.050. WSR 86-03-074 (Order 86-14), § 296-155-20307, filed 1/21/86.]
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