IMO, you stated it as an established fact in your previous post, and it was very misleading.
The tanks are fed by the municipal/city water system which is already chlorinated. No additional chlorination is required unless there is a specific health concern, and then it is dealt with by an order from the Director.
Section 11.38.430 that your reference is preceded by:
from:
http://search.municode.com/html/16274/
The above "Sanitary Defects and Health Hazards" and subsequent issuance of an Order by the Director (i.e. re additional chlorination) only would have occurred AFTER it was determined that Elisa's body was in the water tank.
I've read through the entire section of the code. IMO, there is nothing in the code that sets out additional chlorination as part of an ongoing maintenance program.
Sorry Borris, the roof was not covered in bleach as you previously stated, and there is no reason to believe that bleach even enters into the picture.
MOO
Silly - That's correct, in part. The city provides chlorinated water, enough to kill off bacteria. But chlorine in water degrades over time - in the presence of heat, UV radiation, when it reacts with metals in the pipes, or with organic matter in the water. Since the chlorine in the water tanks degrades, the providers of distribution networks have to maintain "residual chlorine levels". This process is called "booster chlorination" - adding a few tablets per 10,000 gallons of water. Without booster chlorination, the system must be flushed periodically. Flushing periodically is relatively more expensive and takes a relatively longer time with slow rates to flush the water out and accept a fresh supply.
I have read that the hotel uses an old plumbing system for a 600 room grand hotel that now appears to be mostly vacant - IMO this would mean long, hot storage times for the water, with potentially reactive metals within the old pipes, all of which would cause the levels of chlorine to be reduced once it is accepted from the city supply. I have not read that the Hotel's water supply is exempt from either periodic flushing or booster chlorination - doing either in order to maintain residual chlorine levels for the health and safety of its occupants who are drinking from the water held in storage.
- Contamination Requires Disinfection -
As you have pointed out, whenever contamination is introduced into the system, it must be flushed and disinfected with "chlorine". This was done when her body was discovered. But contamination occurs anytime a plumbing pipeline is broken, which will introduce higher-than-normal contaminants into the system that need to be disinfected with higher-than-normal concentrations of chlorine.
About the day she went missing, someone reported flooding between the 3rd and 4th floor after hearing a loud thump. In my opinion, this flooding is indicative of a break in the inlet pipes. This is because "Loud Thumping" in old plumbing is referred to as "Water Hammer" and can cause be caused by a blockage in they system, that can lead to pipe collapse and/or breakage.
From WIKI - Water hammer - "If the pipe is suddenly closed at the outlet (downstream), the mass of water before the closure is still moving forward with some velocity, building up a high pressure and shock waves. In domestic plumbing this is experienced as a loud banging resembling a hammering noise. Water hammer can cause pipelines to break if the pressure is high enough."
In my opinion, the break introduced flooding and contamination in the system, and following repairs, the system had to be flushed and disinfected for the safety of those downstream from the break.
As Oriah has pointed out, flushing out the system could have confused the dogs.
