on the part of the responsible surgeon recommending remedial action; however, they
provide a systematic point of departure.
6-15. REMEDIAL ACTION ACCORDING TO SANITARY CONDITION
There are three sanitary conditions describing local circumstances under which
contaminated samples could be obtained from a potable water supply. The following
remedial actions are recommended, depending upon the condition, when contaminated
water samples are found:
a. Condition I (Normal). No known sanitary defects, health hazards, or
incidents of gastrointestinal diseases can be associated with the contaminated samples.
(1) Possible cause. The contaminated samples might indicate a. localized
situation within the piping of the buiIding where the sample was collected, or result from
a faulty sampling technique.
(a) Collect repeat samples promptly at the points of previous collection.
(b) Expedite shipment of samples so that a prompt report may be
obtained from the laboratory.
(c) Make an immediate investigation to determine if any unusual
conditions have occurred, such as repairs to the water mains, faucets, or piping within
the buiIding or within the vicinity of the sampling point.
(d) Test for chlorine at various outlets to ensure the proper dosage.
(e) If the foregoing investigation indicates the necessity, flush the
portion of the system by opening outlets untiI a proper chlorine residual is recorded.
Carry out localized emergency disinfection if deemed necessary (see para 6-16b).
b. Condition II (Disaster). Contaminated samples are the result of a major
disaster, such as the inundation of the source, breakdown in treatment plant units, gross
contamination of the system through a cross connection, failure of an underwater
crossing, damage from an earthquake, or similar circumstances.
Possible cause. Self evident.
(a) Immediately reject the water supply system and institute
emergency treatment of all drinking water and water used for cui inary purposes