RIP Boiled Water. You Will Be Mist.
The acronym HTH stands for.
What is High Test Hypochlorite?
(aka calcium hypochlorite or powdered chlorine)
How oxygen levels in wastewater change when the temperature increases.
What is decrease?
Oxygen levels in wastewater become less in wastewater as the temperature increases. Thus the dissolved oxygen for effluent water at 12°C might be 8.5 mg/L but at 22°C might be only 6.5 mg/L.
Method of preservation and holding time for a BOD grab sample.
What is refrigeration up to 48 hours?
The length of time that sludge disposal for land use records must be kept in Alabama.
What is 3 years plus the current year?
This happens if a pump loses back pressure.
What is Cavitation?
The reason a backflow preventer or air gap should be put above grade level.
What is how to provide desired pressure head and work properly?
A chemical that will neutralize acidic wastewater
What is Quicklime, hydrated lime, soda ash, or caustic soda?
Other name(s) for Surface Loading Rate.
What is Overflow Rate and/or Surface Settling Rate?
The most likely cause of a heavy flow of wastewater on weekdays between 5:00 pm and 7:00 pm.
What is industrial discharge?
Where you would look on a blueprint to see if a wastewater line is run under a water line.
What is the profile?
The year that the Safe Drinking Water Act passed Congress.
What is 1974?
The desired result when utilizing the recarbonation process.
What is a lower pH?
Recarbonation is a process in which carbon dioxide is bubbled into the water being treated to lower the pH. The pH may also be lowered by the addition of acid. Recarbonation is the final stage in the lime-soda ash softening process. This process converts carbonate ions to bicarbonate ions and stabilizes the solution against the precipitation of carbonate compounds.
What is the Weir Loading Rate?
Used by operators to determine if weirs are hydraulically (flow) overloaded.
The formula used to determine Surface Loading Rate.
What is Flow Rate/Surface Area?
The amount of times the SDWA has been amended since it initially passed Congress.
What is 3?
(1980, 1986, and 1996 amendments)
The year that the CCR Final Rule was published and became effective.
What is 1998?
The Consumer Confidence Report (CCR) Final Rule was published in the Federal Register on August 19, 1998, (63 FR 44512). The CCR became effective September 18, 1998 - 30 days after publication [40 CFR 141.152(a)].
The greatest dilutions of a sample with odor-free water that still yields a just-detectable odor.
What is Threshold Odor Number (TON)?
The jelly-like masses of bacteria found in both the fixed film and activated sludge processes.
What is Zoogleal Mass?
These masses may be formed for or function as the protection against predators and for storage of food supplies.
The measure of the length of time solids in the aeration tank have been retained in the aeration tank.
What is Solids Retention Time (SRT)?
The surface and subsurface area surrounding a public water well or well field, through which contaminants are reasonably likely to move toward and reach such water well or well field.
What is Wellhead Protection Area (WHPA)?
(aka Well Isolation Zone)
The layer of trapped matter at the surface of a slow sand filter in which a dense population of microorganisms develop.
What is a schmutzdecke?
These microorganisms within the film or mat feed on and break down incoming organic material trapped in the mat. In doing so, the microorganisms both remove organic matter and add mass to the mat, further developing the mat and increasing the physical straining action of the mat.
Natural, organic compounds found in all surface and groundwaters, which may react with halogens (such as chlorine) to form trihalomethanes (THMs). Must be present in order for THMs to form.
What is a THM Precursor?
THM = trihalomethanes
The distance in inches between manholes on a map if the manhole is 320 ft from another manhole and it was scaled onto the map as 1 inch = 50 feet.
What is 6.4 inches?
(320 ft/ 50 ft = 6.4 inches)
The most common type of lagoon in current use. The upper portion (supernatant) is aerobic, which the bottom layer is anaerobic.
What is Facultative Lagoon?
A revolving mass of water that forms a whirlpool.
What is a Vortex?
This whirlpool is caused by water flowing out of a small opening in the bottom of a basin or reservoir. A funnel-shaped opening is created downward from the water surface.