| Is bacteria
present? |
| Step 1. |
If the results of a
quarterly or new construction bacteria sample are positive or too
numerous to count (TNTC), take another sample on the next business
day. |
| Step 2. |
If the results of the second bacteria sample are
negative-Stop. |
| Step 3. |
If the results of the second bacteria sample are
positive, determine if the bacteria is in the system or in the
well. |
|
| What is the
source of the bacteria contamination? |
| Step 1. |
To confirm that the source of bacteria contamination
is in the system, collect one sample from the well and a repeat
sample from the same location that originally indicated
contamination was present. |
| Step 2. |
If the sample taken at the well is negative and the
repeat sample taken at the system location is positive, then the
contamination is in the water system. |
|
| How do I
remediate bacteria contamination in the water system? |
| Step 1. |
Disinfect the water system. |
|
Conduct a two-consecutive day bacteria sampling. Two
water samples may be collected on the same day if they are taken six
or more hours apart and the well is purged for 15 minutes prior to
collecting each sample. |
| Step 2. |
If bacteria contamination is still present in the
water system, disinfection equipment will have to be permanently
installed to the system. |
|
|
How do I remediate bacteria contamination in the
well? |
| Step 1. |
Disinfect the well and the water system. |
| Step 2. |
Conduct a five-consecutive day bacteria sampling.
Two water samples may be collected on the same day if they are taken
six or more hours apart and the well is purged for 15 minutes prior
to collecting each sample. |
| Step 3. |
If bacteria contamination is still present in the
well, disinfection equipment will have to be permanently
installed to the system. |
