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STUMPY POINT RO PLANT
LAB
The Dare County Stumpy Point Plant lab has a
small laboratory using state of the art lab equipment. This lab is specifically
set up for our bacteriologicals (from the production system) and physical
chemical testing. All compliance bacteriologicals (from the distribution system)
are performed at the Dare County Water certified lab located at the North
Reverse Osmosis plant.
The lab uses the presence/absence method for
determining total and fecal coliform bacteria. The type of presence/absence
method used is the Colilert method for total and fecal coliforms. With the use
of this testing method, coliform bacteria determinations can be made within 24
to 28 hours. Coliform bacteria can be detected within hours, determinations of
negative detection can be made with 24 to 28 hours, as opposed to longer time
spans with the multiple tube or MFT methods.
Samples must be taken from selected sites in the
Stumpy Point Distribution System and analyzed for bacteria content. The number
of analyses required depends on the size of the system. The Stumpy Point water
system serves a population of approximately 400 and is considered a small water
system. Therefore, we are required to run one bacteriological sample per month.
The Stumpy Point Plant lab performs numerous
physical and chemical analysis on different waters. Analyses are performed on
raw water, finished water, distributed water, permeate water, concentrate water,
concentrate receiving water and as a service to the public our lab will do a
residential analyses upon request. Our concentrate discharge is analyzed
according to an NPDES (National Pollution Discharge Elimination System) permit.
Lab Equipment
Hach DR 4000
This is a microprocessor-operated laboratory instrument pre-programmed
with calibrations for most water management test requirements.
Lab Refrigerator
This refrigerator is used to store our lab reagents.
This ensures that they remain fresh until they are needed.
Lab Incubator
This instrument is used for bacteriological tests; it maintains a
constant temperature of 35 degrees Celsius.
Hach SensIon 156 Multiparameter Meter
This portable meter is used for a number of tests.
It is capable of doing pH, temperature, conductivity and salinity.
HF Scientific DRT – 15CE Turbidimeter
The turbidimeter detects light and provides an electrical signal that is
proportional to the turbidity of the liquid.
Page last updated
October 29, 2004
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