It covered installation and removal of filters during sampling and
warned that "this SOP must be considered as provisional because experience
with the B-S7B unit in the field does not exist 18
His instructions
ran as follows:
1.0
Materials, tools, vehicles, and personnel required.
1.1
Materials, Pre-cut filter paper for F-8,G and B-57B
filter units, aircraft safety wire, 36 inch roll
heavy wrapping paper.
1,2, Tools.
1,.2,1 Assembly tools,
1.2.2
Side cutters, long-nosed pliers.
Removal tools,
Long-handled side cutters, 9 foot
removal pole, long-handled tongs, long-handled wire
puller, long-handled paper roller tool, longhandled instrument adjusting tool, long~handled
hooked carrying pole for filter paper containers,
box shielded with 1/l inch lead sheet for empty
filter holder scrap tie wire, rack for removal
tools, shielded V shaped "cave" for rolling
filters, shielded filter paper carrying cases (pigs).
1.3 Vehicles, Two (2) low bed, rubber-tired trailers, in
tandem towed by truck or tug;
one (1) low bed, rubber-
tired trailer pulled by truck or tug,
1h Personnel, Two (2) airmen, one (1) officer for direct
removal operations, plus one (1) overall supervisor.
2.0
Assembly and Installation.
2el
Assembly.
2.1.1
---
Pre-cut filter is laid into clean filter holders
with care taken to assure good overlap of frame
edges by filter material, Caution: Cloth scrim
mst be laid next to small mesh (din.) wire of
aft frame of holder; reject filters which have
badly ravelled or separated scrim at edges.
Holder is then closed and safety-wired as
required, Caution: Hands and working surfaces
must be surgically clean to avoid undesirable
contamination of filter materials during
preparation,
Holders should be identified by
220
APOHO
SWEH-2-0034
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