I.
Entrances to water system facilities and/ or rooms within water system
facilities that store or use hazardous chemicals as part of the treatment
process:
Precautionary entrance labeling identifying the hazardous
chemical: This labeling shall contain the following.
A. Common name of the chemical
B. A signal word such as "WARNING" or
"DANGER" as described below.
1. Signs
depicting "WARNING" must be yellow with black lettering to identify a
potentially hazardous situation.
2. Signs depicting "DANGER" must have the
word "DANGER" highlighted on a bright red background and be used for conditions
that indicate an immediately hazardous situation.
C. Identification of the key hazard such as
flammable or vapor harmful, etc.
D. A statement of precaution to avoid the
hazards.
E. A color-coded diamond
that readily distinguishes the degree of emergency health hazard (blue), fire
hazard (red), reactivity hazard (yellow), and any other special hazards the
chemical may represent. The following describes the appropriate labeling
conditions.
FIRE HAZARD ---------RED
0 --- WILL NOT BURN
1 --- WILL IGNITE IF PREHEATED
2 --- WILL IGNITE IF MODERATELY HEATED
3 --- WILL IGNITE AT MOST AMBIENT CONDITIONS
4 -- BURNS READILY AT AMBIENT CONDITIONS
HEALTH HAZARD ------BLUE
0 --- MINIMAL HAZARD
1 --- SLIGHTLY HAZARDOUS
2 --- HAZARDOUS
3 - EXTREME DANGER
4 - DEADLY
REACTIVITY HAZARD ---- YELLOW
0 - STABLE AND DOES NOT REACT WITH WATER
1 - UNSTABLE IF HEATED
2 - VIOLENT CHEMICAL CHANGE
3 - SHOCK AND HEAT MAY DETONATE
4 - READILY CAPABLE OF DETONATION AT NORMAL TEMPERATURE AND
PRESSURE
SPECIFIC HAZARDS - WHITE
OX --- OXIDIZER
ACID --- ACID
ALK --- ALKALINE
COR - CORROSIVE
W - REACTIVE WITH WATER
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RADIOACTIVE
F. All the above information can be obtained
from the chemical Material Safety Data Sheets (MSDS) for each chemical. The
public water system must retain the most current copy of all MSDS(s) for all
chemicals used in the treatment of potable water and have the MSDS located in
an area so that they are available and accessible to all water operators and
facility personnel.
G. All signage
installed on entrances to water treatment facilities or rooms within the
facilities must be located so that signage is readily visible to individuals
entering the facility or rooms within the facility.
II.
LABELING OF BULK TANK CHEMICAL
STORAGE AND OR DAY-TANK CHEMICAL STORAGE
A. All bulk chemical storage tanks must be
labeled as follows:
1. The common name of the
chemical
2. The appropriate
color-coded diamond with four quadrants designating the degree of emergency
health hazard (blue), fire hazard (red), reactivity hazard (yellow), and any
other special hazards as designated in the remaining quadrant (white). The
coding for each hazard is described in 179 NAC 22 Attachment 1 item I.E.. The
size of characters in this signage must be a minimum of 4 inches tall and
placed so that the signage is visible from 200 feet away.
B. All day-tank chemical storage tanks are to
be labeled in the same manner as described above with the signage characters a
minimum of 3 inches in height and signage placed so it is visible a minimum of
100 feet away.
