limited hoisting license RI
tolerance zone - Answer-<- 18" -> 20" <- 18"-> on each side
spoil piles at least 2 ft back - Answer-short term exposure 24 hours or $350-$2500 fine (call digsafe 72
hours in advance 30 day max)
RED - Answer-electric power lines, cables, conduit and lighting cables
YELLOW - Answer-oil, steam petroleum oe gaseous materials
ORANGE - Answer-communication, alarm or signal lines, cables or conduit
BLUE - Answer-potable water
GREEN - Answer-sewers and drain lines
PURPLE - Answer-reclaimed water, irrigation, and slurry lines
PINK - Answer-temporary survey markings
WHITE - Answer-proposed excavation
, In excavations greater than 4ft oxygen deficiency how much is considered flammable - Answer-19.5%
(20%)
In working within 100ft or utilities the area has to be marked out first, when do they expire? - Answer-
marks expire in 60 days
How often should you test holes? - Answer-every 20'-25'
trench box must be how many inches above ground - Answer-18"
how many pounds is 1 ton - Answer-2,000 pounds
is it okay to dig on top of live gas line? - Answer-Yes, if using a vac truck
When should an air filter be replaced? - Answer-When it is dirty enough to restrict air flow
What does notation 6 mean? - Answer-Offset 6ft to the center of the trench
Power line clearance distance: voltage 50 kv - Answer-Distance from power line: 10 feet
Power line clearance distance: voltage 200 kv - Answer-Distance from power line: 15 feet
Power line clearance distance: voltage 350 kv - Answer-Distance from power line: 20 feet
Power line clearance distance: voltage 500 kv - Answer-Distance from power line: 25 feet
tolerance zone - Answer-<- 18" -> 20" <- 18"-> on each side
spoil piles at least 2 ft back - Answer-short term exposure 24 hours or $350-$2500 fine (call digsafe 72
hours in advance 30 day max)
RED - Answer-electric power lines, cables, conduit and lighting cables
YELLOW - Answer-oil, steam petroleum oe gaseous materials
ORANGE - Answer-communication, alarm or signal lines, cables or conduit
BLUE - Answer-potable water
GREEN - Answer-sewers and drain lines
PURPLE - Answer-reclaimed water, irrigation, and slurry lines
PINK - Answer-temporary survey markings
WHITE - Answer-proposed excavation
, In excavations greater than 4ft oxygen deficiency how much is considered flammable - Answer-19.5%
(20%)
In working within 100ft or utilities the area has to be marked out first, when do they expire? - Answer-
marks expire in 60 days
How often should you test holes? - Answer-every 20'-25'
trench box must be how many inches above ground - Answer-18"
how many pounds is 1 ton - Answer-2,000 pounds
is it okay to dig on top of live gas line? - Answer-Yes, if using a vac truck
When should an air filter be replaced? - Answer-When it is dirty enough to restrict air flow
What does notation 6 mean? - Answer-Offset 6ft to the center of the trench
Power line clearance distance: voltage 50 kv - Answer-Distance from power line: 10 feet
Power line clearance distance: voltage 200 kv - Answer-Distance from power line: 15 feet
Power line clearance distance: voltage 350 kv - Answer-Distance from power line: 20 feet
Power line clearance distance: voltage 500 kv - Answer-Distance from power line: 25 feet
