Total Residual Chlorine (TRC) is the total of free available residual chlorine and combined (bound) residual chlorine. The amount of measurable chlorine remaining after treating water with chlorine i.e. amount of chlorine left in water after the chlorine demand has been satisfied

Free Available Residual Chlorine (FRC) is Free Available Chlorine after treating the water with chlorine. That portion of the total available residual chlorine composed of Dissolved Chlorine gas cl2), Hypochlorous Acid (HOCl), and/or Hypochlorite Ion (OCl-) remaining in water after chlorination. This does not include chlorine that has combined with ammonia, nitrogen, or other compounds. See similar questions...

Combined Residual Chlorine. Chlorine reacts with organics forming chloro-organics and chloramines. This is a chlorine residual that, because it has reacted with other chemicals in the water, lost some of its disinfecting strength. See similar questions...

Because ozone is a gas and very reactive, it is impractical to establish an ozone residual. Therefore, a chlorine residual is required to protect swimmers. See similar questions...

Answer - Total residual disability means that because of sickness or injury you are not able to perform the material and substantial duties of your own occupation. See similar questions...

No. The small amounts of chlorine in your water prevent harmful bacteria growing in the water mains or your pipes. You can rest assured that the usual amount of chlorine in water leaving treatment works is safe and well within the World Health Organisation guidelines. See similar questions...

Chlorine total is the total amount added to the water for treatment. Chlorine free is the amount of chlorine available in the water for treatment. Chlorine total should always be equal to or greater than chlorine free. See similar questions...

In residential pools, there is no legal requirement to use chlorine at all. In fact, many ion users don't. They use a non chlorine shock or ozone and are very happy. However, we are not suggesting or recommending the ion system is an alternative to chlorine alone. There are reports that show that a low level of chlorine and the use of an ion system is a much better way to sanitize than either method alone. See similar questions...

Total chlorine is just as it sounds, the total amount of chlorine in the water. However when chlorine binds up with contaminants it forms a compound called "chloramines" that are no longer effective sanitizers and need to be removed through shocking. The chlorine that is still "good" to keep working is the free chlorine. If directions call for maintaining a 1ppm chlorine level, always make sure that matches your free chlorine reading. See similar questions...

Pool and spa water treatment with chlorine and other halogen disinfectants (bromine) require maintaining a residual concentration of at least 1 to 3 PPM (Part Per Million) in water. The effectiveness of the use of these chemicals is controlled by many variables: pH, dissolved solids, temperature and halogen concentrations. Under EPA urging, most municipalities now restrict the from dispensing and storage of chlorine. See similar questions...

Neither chemical fumigation nor ThermaPureHeat® have a residual effect. They kill what is in the house, but won't kill anything entering after the treatment. See similar questions...

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If you have a residual definition or rider on your policy, the policy will pay you a benefit if you have a loss of earnings (usually 20 percent). You do not have to be totally disabled to collect benefits. See similar questions...

residual garbage" means household waste other than,: recyclable material, compostables and construction or demolition debris. See similar questions...

When we "mark" a visitors PC with a cookie (see above) we set the lifetime of that cookie to 1 year. This means that when that visitor makes a purchase on our site at any time during that 1 year period you get credited with the commission. That is ALL their purchases ANY TIME during the 1 year period. They do not always have to come via your site. This is known as residual income. See similar questions...

Chlorine changes the tastes and odor of water. Chlorination can also produce harmful by-products called Trihalomethanes (THMs) which are linked to incidence of cancer. No, the UV unit will use about the same amount of energy as a 60 watt light bulb. It is a cost effective, natural way to increase water quality where microbiological contamination is present and to provide peace of mind where microbiological contamination is a greater risk. See similar questions...