Properties
What is the chemical formula for nitrate?
NO3
What is the nitrate MCL?
10 mg/L (as N)
What is the level of public notice for a nitrate MCL violation?
Tier 1
What is TDS (total dissolved solids)?
(total dissolved solids)?Over 500 mg/L, this compound interferes with the anion exchange process.
Since nitrate contamination of GW is often localized, this action might work if you have access to an uncontaminated aquifer.
abandon contaminated well and drill a new well
What is the electrostatic charge of a nitrate molecule.
-1
What is sampling frequency of a well that is consistently less than 50% of the MCL?
One sample per groundwater source per year.
What is the deadline for distributing a Tier 1 public notice?
24 hours
What is salt (sodium chloride)?
This compound is most commonly used to regenerate anion exchange media.
If nitrate contamination is localized within a specific portion of the aquifer, these actions may lower nitrate concentrations in the pumped water.
packers, sleeves and engineered suctions
What is the primary source of nitrate contamination in groundwater.
fertilizer or agricultural runoff
What is the sampling frequency for SW systems and groundwater > 50% of the MCL?
Quarterly
What are methods of delivery of a Tier 1 public notice?
1) Radio or television;
(2) Posting in conspicuous locations throughout the service area;
(3) Hand delivery to persons served by the water system; or
(4) Other method approved by the State Board
What is a negatively charged compound?
Type of charged compound (ion) removed by anion exchange.
Increasing this pumping parameter vertically shifts flow contribution upward inside well
decreasing the well pumping rate
What are the names of the elements that make up a nitrate molecule
oxygen and nitrogen
When are annual nitrate samples required to be taken?
Any time of the year.
What is the regulatory agency that must approve a public notice PRIOR to distribution?
DDW or LPA
What are the two ions are generally removed in the anion exchange media before nitrate is removed?
sulfate (SO4) and arsenic (HAsO4)?
What is regionalization?
The process of combining neighboring water systems to create a more robust and resilient utility.
What is the molecular weight of a nitrate molecule?
63
What is the nitrate MCL expressed as NO3?
45 mg/L
What is the address on the DDW website where you can find the nitrate public notice templates?
What is chromatographic peaking?
Phenomena where contaminants are captured, concentrated and migrates through the filter bed making multiple filters connected in series a good idea.
What is blending?
The process of combining a contaminated source with an uncontaminated source(s) to create a water quality that meets the MCL.