WATER
Water with a pH of 7.9 is considered to be this
WHAT IS BASIC, NEUTRAL OR ALKALINE
This is the most common flow measuring device installed on the influent to a metering station
WHAT IS A PARSHALL FLUME:
Device used to measure flow rate with a constricting narrow section to speed up flow
A gas meter will observe an oxygen deficient atmosphere if the percent drops below this number
WHAT IS 19.5%
The competent person does not have to test the excavated soil when it has been deemed this
WHAT IS CLASS C SOIL
In Virginia, a NORMAL miss utility ticket or locate request is only valid for how many working days
WHAT IS 15 WORKING DAYS
This is a commonly used method to test for chlorine residual in water.
WHAT IS THE DPD METHOD. THE CHLORINE IS DETERMINED BY COMPARING A DEVELOPED COLOR WITH STANDARDS.
OUR HACH COLORIMETER USES DPD POWDER THAT REACTS WITH THE RESIDUAL CHLORINE, TURNING IA SHADE OF PINK.
These units shred or cut up rags and large solids in wastewater systems and return the shredded solids back in to the sewage flow.
WHAT IS A GRINDER OR "MUFFIN MONSTER"
Is large enough to enter, has limited means of entry/exit and has no design for continuous occupancy
WHAT IS A CONFINED SPACE
An excavation 12' foot deep and 150' foot long require ladders at this minimum spaced interval for the means of safe entry & exit from the trench
WHAT IS 50' FOOT
The extent of the excavators proposed excavation shall be a work area that can be excavated within 15 working days and must not exceed this unit or length or distance when submitting a ticket
WHAT IS ONE-THIRD OF A MILE
When sampling for bacteria in a distribution system, a sample bottom is prepared with this chemical before it is sterilized.
WHAT IS SODIUM THIOSULFATE
This term is used to describe stormwater or groundwater flow into a sanitary sewer during wet weather conditions
WHAT IS INFLOW & INFILTRATION
WHAT IS HYDROGEN SULFIDE
If a ladder is placed inside an excavation, it must extend this far out of the trenches indicated surface
WHAT IS 3' FOOT
WHAT ARE PRIVATE LINES
This coefficient is used to describe the smoothness of a pipe's interior and its impact on water flow.
WHAT IS THE C-FACTOR
The typical operating mode for two identical pumps in a sewage pumping station (REDOUBT)
WHAT IS "RUN", "LEAD", "LAG"
One pump "leads" or runs continuously, while a second pump "the lag" only activated when the lead pump's capacity is insufficient to meet the system's demand.
This poisonous chemical often called the "silent killer" is a colorless, odorless and tasteless gas that is undetectable to the human sense.
WHAT IS CARBON MONOXIDE
This sloping ratio must be used when excavating Class C soils in which the horizontal spoil piles must be pushed back for every vertical foot excavated down.
WHAT IS 2:1
This is issued to notify utility members when the excavator finds clear evidence of unmarked utilities. This includes knowledge of present utilities and faded marks from a previous locate request. This can also be used to dispute a positive response or when no response has been posted.
WHAT IS A 3HR NOTICE
This mass of concrete placed at bends and valves structures to prevent pipeline movement is commonly called a
WHAT IS A THRUST BLOCK
CMOM
WHAT IS A PROGRAM TO EVALUATE A WASTEWATER COLLECTION SYSTEM'S MANAGEMENT, OPERATION AND MAINTENANCE ACTIVITIES.
HELPS BETTER MANAGE AND OPERATE THE COLLECTION SYSTEM TO PREVENT (SSO)
This continuous act is required wherever there is a potential for hazardous atmospheric conditions.
WHAT IS VENTILATION
The greatest threat in trenching operations more likely than any other excavation related incident to result in worker fatality.
WHAT IS A CAVE-IN.
ONE CUBIC YARD OF SOIL CAN WEIGH MORE THAN 2,000 LBS. AN UNPROTECTED TRENCH CAN BE AN EARLY GRAVE.
In Virginia, failing to respond to a locate request and causing damage can result in significant fines. This "no show" response code means the locator has failed to enter their response within the required 48 hours by law.
WHAT IS "999". This automated response is generated by 811 immediately after the due date when a locator has failed to post a response code to the Positive Response System. A "no show" ticket is transmitted by 811 to the member operator and "999" is posted to the system.