Page 23 - Damage Prevention Journal 2019 Issue 1
P. 23

I  d t. f ty
Part two: The Importance of 0SHA’s General Requirements
it, David v. Dow

A5 discassed in tlte part 1 a/tlte series, iaarkiitg itt trenches and eicaaatiaris is potentially aite u/the ntast ht1zm'dtm5 t‘_i/pcs ufwork itt tlte
cavstriictieri arid atility ittditstry. Each year, as m/Irly as 400 workers are killed and several thaiisattd are iriiitred tzrmss the ll.s Mast 0] these
iaarkers ltaae received nu traiitirtg, and tlte trericltes arid ercaeatiaits iri whlrh niishaps accar me relatively shautna (fire ta 15fcci deep).

Tlte CEtt('lI1IR('qllil'EmEltf5 sectiari o/OSHA’: 29 CFR 1925, siitpart P 7 Ercaeatiaits, addresses 0 nintilrer tJf"(ovllmnl1 serise itciiis" related to
treitcltes attd ercavatians.

SURFACE ENCLTMERANCES 7 These edge, warning systems 7 such as systems, laracing or underpinning may
are described as telephone poles, trees, liarricades, spotters, or stop logs 7 are bl: required to ensure the stability of
fire hydrants, street signs, sidewalks, required these structures, and protect employees
°“Tb"' “mi g““‘“' ““d ”‘"“'“ °‘Ti°““ HAZARDOUS ATMOSPHERES 7 LOOSE SOIL OR ROCK 7 spuils and
aoltacent to an excavation. They should .

. Thls section of the OSHA standard equ|pm2nI must be set hack at least
lieremovedorsupported,toinsure ._d _. (H ‘U k f M E N H‘ d uh I h
their stability and saieguard employees. “ °“‘$"*,, ° F“, ‘ W” 2“. ’°‘“ ° “. “’"‘ ° 2 3“ ° ° *9“ ‘"

so-callcd bad air concerns include excavation
UNDERGROUND lNsTALLATloNs too little oxygen, too much oxygen, INSPECHONS 7 A pmpedy mama
7 These include underground utilities tlammahle gases such as methane and . ,, ,,
_ _ _ _ and authorized competent Person
such as sewer, gas water, and natural gas, and toxic gases such as .

. . _ . must inspect the excavation daily,
telephone and electric lines. utility hydrogen sulfide or carbon monoxide. I H‘ 1 I i k d _
companies must be contacted within Testing and the use of ventilation P"°d‘ gm‘ “ al’ " "3?’ 1' “i“‘_ “Z
established or customary local lead equipment are two or the most “ff ° . _:°“g T?“ d fa“ 1"“ L}.
times, advised otthe proposed work, common, and important, methods oi L“ 3"“ °""_‘:" ““ ‘’ °‘’"“g;h °’
and asked to establish the location of addressing hazardous or potentially “CZ” “‘l‘“";’"K;‘“E “§‘“"“:‘°}’:“' k E
the utilities prior to the start of actual hazardous atmospheres. d°"‘Pf 9" ‘M’: TE“ _° 5‘ _
excavation All underground utilities “ ‘““°“ 73”’ P‘°§“d“’? “V” °")“ d
must he protected, supported, or i 2 °’§.“"‘. “";‘5 “”fbf“
removed to protect workers. °’ “‘ ‘““ "“‘° ° PW‘ 9

— H cave-ins and hazardous
ACCESS & ECRESS 7 These are 3 or potentially hazardous
lust tancy words for getting in or 1 conditions.
out oi an excavation Trenches FALL PROTECHON i
and excavations deeper than walkways WM‘ “Ham
four feet require a means of Less Less . ’ ’
 and egmss. can worker 4- Than my 4- man up g“*";‘”"~_"*“ ml."-ml yhm _
must be within 25 feet of a 25 M. 25 fl. ‘mp ‘WEE’ “J ‘q““l/:]";l‘f‘ T?”
ladder, ramp, Dr stair The means °1‘1"i’:"‘t“"" ‘’“:‘b E " P‘; d
of access and egress must he ° “ " ° “d” "‘“° 2 “"1” 9
within a protected area. 40 n °"°V‘”
VEHICULAR TRAFFIC 7 Paylng (‘lose illlentlon ID each
workers exposed to traiiic °‘ “*5? ““"."““"‘ ""‘“““""V
"‘“’”’“ P‘°"“‘d "ml" “‘ WATER ACCUMULATION 7 "I! h l éflfgzmm :“Tu";§ttfl'“m'§ ll
must wear, waming vests or other . ‘“ E P ‘“‘“‘E W” *3‘ °“ ? >' “Z W“
. . . Employees must not work in trenches as help contractors and utilities stay
highly visible garments. signs, signals, . ,,
or excavations where there is legal with OSHA '
liarncades, and/or ilagmen may also he
d accumulated water, or where water V,

“‘T“"‘ is accumulating, unless ildzquille E”!‘.";’ 5 Nff‘ Th’? "[57: 25"” "’fi”"
patting Loans _ w.,,i,e,, no not precautions are taken If the excavation H; M 9; H; '5’ ‘Hf-7 "H 'j€;'fé95 Svmfir
permitted underneath overhead loads. work interrupts the natural flow of j :57" ;" 1'?" ’“ ‘if ""1 ;‘ ' '  0'"
ln addition, employees must stand surface water, then diversion ditches, “ 9 ‘’ ‘,’’(')'I:5''’” ,"  E V "f ‘mg , V
away fxom equipment belng loaded or dikes, or other means may he requlmd 5"’-”“""‘“ - “W5 9' '5 '5 "" W" “M
unloaded fmm vehicles. to keep water out. o] the siilr;cr'- If '5 ""”“‘““” "’ ””’""'V

carter tlte topic in yastfniir retatiaety shert
WARNING SYSTEMS FOR MOBILE ADJACENT STRUCTURES 7 The articles. cinrtractars and utilities invalved
E U!PMENT—Wlten e ui merit stalaility of sidewalks, streets, adlnining in antler mm: were anl1,,ee,1,.a,i,-t,a,,,,.l

q P 2
is o erated near the ed e of an liuildings, walls, and other structures trainitt to insine rnarker sa et
P 3 x y
excavation, and the operator does not can be endangered by excavation
have a clear and direct view oi that operations specialized shoring
2nl9. lssue I -Dnmng: eretrenttcn Jaunul E21

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