Attachment 8 2021 Shop 57 IH Survey 49.pdf

VENTILATION EVALUATION

LOCATION:

Building 234, Non-Nuclear Area

DATE(S): 31 March - 08 April 2021

Equipment Average Duct Velocity Readings

ACGIH

Recommendation

Comments

Work Station #1 (Calcium silicate & Foamglas® cutting – ventilated bandsaw)

Duct 1: 2370 fpm Duct 2: 2335 fpm (Total Velocity:

4705 fpm)

3000 fpm duct velocity (Table 5-1)

- Better than ACGIH recommendations.

- Manometer appeared to be malfunctioning and stuck at 3.5” H2O. Repair manometer.

- Ventilated band saw room used during calcium silicate (KAYLO) and Foamglas® cutting.

- Supplemental local exhaust ventilation (drum top vacuum) provided.

Work Station #3 (Fibrous glass cloth cutting downdraft table)

Duct 1: 4271 fpm Duct 2: 4250 fpm

8521 fpm)

2500 fpm duct velocity (Table 5-1)

- Better than ACGIH recommendations.

- Slot face readings ranged from 30-262 fpm.

- Manometer read >2.5” H2O. Pre-filters need to be cleaned.

- Ventilated table is used when cutting fibrous glass cloth to various sizes.

Work Station #4 (TempMat insulation downdraft cutting table)

Duct 1: 2702 fpm Duct 2: 2577 fpm

5729 fpm)

- Better than ACGIH recommendations.

- Slot face readings ranged from 1302-4042 fpm.

- A manometer was present but was non-functional. Repair manometer.

- Ventilated table is used when cutting TempMat to various sizes.

Work Station #10 (Sewing table – slotted table)

Duct 1: 1652 fpm Duct 2: 1718 fpm

3370 fpm)

- Better than ACGIH recommendations.

- Slot face readings ranged from 953-3172 fpm.

- Manometer was not working properly (contained a bubble). Repair manometer.

- Ventilated table is used when sewing (manual and machine) prefabricated fiberglass cloth and TempMat sections.

fpm = feet per minute