N.J. Admin. Code § 7:14A-23.14 - Measuring, recording, and sampling requirements at treatment plants
(a) At treatment
plants, a means for continuous measuring, indicating and recording of the
sewage flows shall be installed.
(b) Meters shall be installed in such a
manner and location so as to provide a true indication of actual
flow.
(c) All wastewater treatment
plant designs shall include provisions in terms of number and location for
sampling and monitoring as required by its NJPDES permits, Sludge Quality
Assurance Reports, Bioassay, and Local Pretreatment Discharge Limits.
1. At a minimum, all wastewater treatment
facilities shall be designed and constructed to provide for the collection of
representative samples as follows:
i. Influent
quality before introduction of recycled waste which may be incorporated within
the wastewater facility's processes (for example, wastewater quality prior to
introduction of supernatant from sludge thickening or digestion and prior to
the introduction of scrubber water from sludge incineration etc.);
ii. Effluent quality after the last treatment
plant unit at the point of discharge;
iii. Sludge at a location meeting the
requirements established under the Sludge Quality Assurance Regulations,
N.J.A.C. 7:14C. In addition, the provisions for sludge sampling shall meet the
following minimum requirements:
(1) Sludge
sampling points shall be established at a location which assures homogeneity
and best represents the physical and chemical quality of all sludge which is
removed from the treatment works for ultimate management;
(2) Sludge sampling points shall provide for
sample collection at the frequency required under the Sludge Quality Assurance
Regulations; and
(3) Sampling
equipment shall be constructed of materials which will not contaminate or react
with the sludge (for example, galvanized or zinc coated items may not be used);
and
iv. Wastewater
quality after every treatment unit.
2. In specific cases, the Department may
require the installation of additional sampling points and equipment to assure
adequate collection of technical data relevant to protection of the environment
or public health.
(d)
Monitoring chambers shall meet the following minimum requirements:
1. The monitoring chamber shall be
constructed of a permanent and durable material with an opening large enough
for access by both sampling personnel and equipment.
i. The sampling chamber shall have a minimum
seven foot ceiling clearance;
ii.
Electrical outlets shall be provided so that 24 hour sampling equipment can be
accommodated; and
iii. The access
door or manhole shall have a minimum opening of 24 inches and shall be
lockable;
2. An accurate
flow measuring device with a totalizer and recording equipment with a
documented regular calibration program shall be provided;
3. High water alarms shall be included in all
sumps;
4. Pickup probes for all
monitoring and sample collection devices shall be provided;
5. All influent streams into the public sewer
which are required to be monitored by the applicable permit shall be free of
external sources of water (for example, supernatant return, stormwater runoff,
unless such runoff is being monitored, tidal water, etc.);
6. A back flow prevention device shall be
installed if pumping or flowing to a force main;
7. If the sampling chamber is not in a
secured area, it shall be surrounded by a chain link fence;
8. The sampling chamber shall be accessible
by motor vehicle; and
9. Adequate
lighting and ventilation shall be provided and the area shall be free of any
safety hazard.
Notes
See: 31 New Jersey Register 200(a), 31 New Jersey Register 1320(a).
In (c)1iii, changed N.J.A.C. reference.
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