Nationall Gridl Taskl 71l Reviewl (Latestl
2025/l 2026l Update)l Excavationl &l
Backfilll |l Questionsl &l Answers|l Gradel
A|l 100%l Correctl (Verifiedl Solutions)
Q:l Whenl exposingl anl unknownl facilityl duringl anyl excavation,l whol mustl
youl calll andl whatl mustl youl do?
Answer:
Calll 811
Recheckl companyl records
Q:l Standardizedl utilityl markingl systeml consistsl ofl whatl colorsl andl
utilitiesl thatl arel mostl commonlyl seen?
Answer:
Gasl -l Yellow
Electricl -l Red
Sewagel -l Green
Waterl -l Blue
Communicationl -l Orange
Q:l Standardizedl utilityl markingl systeml consistsl ofl whatl colorsl andl
utilitiesl thatl arel notl commonlyl seen?
,Answer:
Proposedl Excavationl -l White
Temporaryl Surveyl -l Pink
Slurry,l Reclaimed/Greyl Water,l Radioactivel -l Purple
Q:l Thel markl outl isl preservedl byl whatl responsiblel party?
Answer:
Thel excavator
Q:l Anytimel thatl anl excavationl isl plannedl withinl *200l feetl ofl al gasl
regulatorl orl gatel station*,l whol mustl bel notified?
Answer:
Gasl controll andl thel Instrumentationl andl Regulationl Department
Q:l Howl farl froml thel edgel ofl thel excavationl mustl Excavatedl materiall bel
placedl atl al minimum?
Answer:
2l feet
Q:l Ifl partl ofl thel pavementl wherel thel excavationl isl beingl performedl
becomesl undermined,l whatl mustl happen?
, Answer:
Thisl portionl mustl bel removed,l orl shoringl willl needl tol bel installed
Q:l Atl whatl excavationl depthl isl shoringl mandatory?
Answer:
5l feetl orl more
Q:l Defaultl soill atl Nationall Grid
Answer:
Typel C
Q:l Thel tolerancel zonel (handl digl zone)l determinedl how?
Answer:
18l inchesl plusl 1/2l thel diameterl ofl thel utilityl onl eachl sidel ofl thel centerl
linel mark
Q:l Whenl isl thel vacuuml excavationl methodl andl handl diggingl required?
Answer:
2025/l 2026l Update)l Excavationl &l
Backfilll |l Questionsl &l Answers|l Gradel
A|l 100%l Correctl (Verifiedl Solutions)
Q:l Whenl exposingl anl unknownl facilityl duringl anyl excavation,l whol mustl
youl calll andl whatl mustl youl do?
Answer:
Calll 811
Recheckl companyl records
Q:l Standardizedl utilityl markingl systeml consistsl ofl whatl colorsl andl
utilitiesl thatl arel mostl commonlyl seen?
Answer:
Gasl -l Yellow
Electricl -l Red
Sewagel -l Green
Waterl -l Blue
Communicationl -l Orange
Q:l Standardizedl utilityl markingl systeml consistsl ofl whatl colorsl andl
utilitiesl thatl arel notl commonlyl seen?
,Answer:
Proposedl Excavationl -l White
Temporaryl Surveyl -l Pink
Slurry,l Reclaimed/Greyl Water,l Radioactivel -l Purple
Q:l Thel markl outl isl preservedl byl whatl responsiblel party?
Answer:
Thel excavator
Q:l Anytimel thatl anl excavationl isl plannedl withinl *200l feetl ofl al gasl
regulatorl orl gatel station*,l whol mustl bel notified?
Answer:
Gasl controll andl thel Instrumentationl andl Regulationl Department
Q:l Howl farl froml thel edgel ofl thel excavationl mustl Excavatedl materiall bel
placedl atl al minimum?
Answer:
2l feet
Q:l Ifl partl ofl thel pavementl wherel thel excavationl isl beingl performedl
becomesl undermined,l whatl mustl happen?
, Answer:
Thisl portionl mustl bel removed,l orl shoringl willl needl tol bel installed
Q:l Atl whatl excavationl depthl isl shoringl mandatory?
Answer:
5l feetl orl more
Q:l Defaultl soill atl Nationall Grid
Answer:
Typel C
Q:l Thel tolerancel zonel (handl digl zone)l determinedl how?
Answer:
18l inchesl plusl 1/2l thel diameterl ofl thel utilityl onl eachl sidel ofl thel centerl
linel mark
Q:l Whenl isl thel vacuuml excavationl methodl andl handl diggingl required?
Answer:
