Greetings,

State surveyors were just at one of our clinics in Texas. They stated that "The bleach you are using is only coming out to be 490 PPM (We order 5.25% Sodium Hypochlorite (NaOCI). We mixed this solution: (5940 ML - Water and 60mL of the bleach) to get a 1% solution.
Tell me how this is only 490 PPM.
They want at the LEAST "500 PPM". If you could figure it in for the 6000 mL total and 2000 mL total.
Thank you!!!!!!!!

Instructions on the front of the bottle say:

"15 oz of this product to 10 gallons of water to provide approx 600 ppm available chlorine by weight."

I have no clue how to convert this, and I definately don't need 10 gallons of water. All I need is 6000 ml and 2000ml.

Thanks

Hi, upset....

I've done some conversions for you.

As you stated, according to the manufacturer, 15 oz. of bleach added to 10 gallons H2O will give you approximately 600 ppm strength of solution.

I simply divided your values by 10. 1.5 oz bleach to 1 gallon H20. One gallon H2O is equivalent to 3780 mL. 1.5 oz bleach is equivalent to 44.36 mL (we'll say 45 mL to be safe and to help round off.) So......

Use 1 gallon RO H20 to 45 mL bleach to get the required strength of solution. Use approximately 24 mL bleach for 2000 mL H20. For your 6000 mL conatiner, use 70 mL.

Hope this helps!

Thank you guest,

Could you please give me your work on how you got the 24 mL bleach for 2000 mL h20. I will need to explain it. Thank you agian!

An alternative (and lazy guy) method of validating efficacy of bleach solutions is to verify concentration using a 1% bleach test strip (WaterCheck CP.)

In order to get 500ppm with 5.25 out of any amount of water you just take the amount of water X the amount desired in ppm / by the amount in ppm in one gallon of 5.25 bleach (50,000 via clorox ) e.g.

10gal water X 500 ppm
------------------- =
50000 ppm
.

I was always told that the surveyors are supposed to be our "partners in care". More and more they seem to be more our adversaries than anything else.

Chuck

If indeed “UPSET” mixed the 60 ml of 5.25% bleach with 5940 ml water, the concentration should be 52,500 /100 or 525 ppm. If indeed the mixture was only 490 ppm it is 93% of expected strength and 98% of the mandated 500 ppm strength. Either the bleach was actually only of 4.9% strength, the water or container used had a chlorine demand, the solution lost strength before it was tested for concentration, or the measurement of 490 ppm was inaccurate.
If it was the bleach that was weak, then, (60/0.98 =61.2), 61+ ml of the bleach added to 5939 ml of water would give the 500 ppm.
It is very questionable that an inspector even had the ability or equipment to measure the strength of the bleach solution to within 10%. Anyone who thinks this has any importance is clueless!!
I agree with Chuck. The new regulations and their enforcement is a cruel joke and the inspectors will likely be unable to identify real problems and shortcomings that might exist.

Save yourself the trouble and order the ultra bleach which is 6% solution and tell them to go away.

First of all, the 5.25% is the concentration of Sodium Hypochlorite (NaOCl), not chlorine (Cl2).

My calcs say that 60 ml of 5.25% NaOCl in 5940 ml of water is 500.059 ppm Cl2. 60 ml of 5.25% NaOCl in 6000 ml of water is 495 ppm Cl2.

20 ml of 5.25% NaOCl in 1980 ml of water is 500.06 ppm Cl2.

It is a very involved calculation, which is why I put it in an excel spreadsheet. If you want a copy, send me your email.

Also, be sure you are using non-scented bleach.

Although this is technically over 500 ppm Cl2, I agree with Bamatech.

Florian,

I would like a copy of your spreadsheet

jhordsa@yahoo.com

Florian,

Please send me your spreadsheet: mhalloran@idsdialysis.com

Larry, I would appreciate it also.

chuckweddle@idfdn.org

Chuck

Florian is correct but it took me a while to figure out how he got his numbers. Chlorine gas is diatomic and is designated Cl2. When it is added to water, one of the chlorine atoms forms HOCl and the other goes into solution as a chloride ion Cl-. Only the HOCl is an oxidant. Sodium hypochlorite, NaOCl just exists as the hypochlorite ion, OCl- and the sodium ion Na+. The molecular weight of sodium hypochlorite is about 74.45 and the molecular weight of the chlorine atom is about 35.45. Thus only (35.45/74.45) or 47.6% of sodium hypochlorite is chlorine atoms by weight. However, each atom of chlorine in bleach forms a hypochlorite ion while only ½ of the atoms in chlorine gas forms HOCl. So, multiplying the 47.6% by 2 yields 95.2%. Thus 5.25% hypochlorite by weight is 5.25 x 0.952 or 5.00 %. Diluting the bleach 100:1 with water thus makes a 500 ppm available chlorine solution.
A more precise calculation would use more accurate atomic weights and would adjust for the specific gravity of 5.25% bleach.

Florian,
I too would like a copy. My email is ckjca@sbcglobal.net
Thank you