New Jersey Administrative Code › Title 7 - ENVIRONMENTAL PROTECTION › Chapter 18 - REGULATIONS GOVERNING THE CERTIFICATION OF LABORATORIES AND ENVIRONMENTAL MEASUREMENTS › Subchapter 9 - SAMPLE REQUIREMENTS › Section 7:18-9.4 - Requirements for sample handling and preservation for specific parameters

Current through Register Vol. 56, No. 14, July 15, 2024
(a)
				A laboratory shall handle and preserve samples in accordance with the following
				requirements:
1. All sample bottles for
				aqueous samples shall be precleaned before arriving on site.
2. All sample bottles used for taking grab
				samples, except for prepreserved bottles, shall be rinsed with sample water at
				least twice before being filled, unless the sample is to be analyzed for any of
				the following:
i. Petroleum
				hydrocarbons;
ii. Oil and
				grease;
iii. Pesticides;
iv. PCB, PBB and herbicides;
v. Bacteriological;
vi. Dissolved oxygen;
vii. Volatile organics; or
viii. Metals.
3. After rinsing, the sample bottle shall be
				filled with the sample using a minimum of agitation.
4. Fill the sample bottle completely if the
				sample is to be analyzed for purgeable organics, oxygen demand, hydrogen
				sulfide, hardness, ferrous iron, acidity, or alkalinity.
5. For samples to be analyzed for parameters
				other than those listed in (a)4 above, leave at least one inch of air space at
				the top of the sample bottle.
6. If
				a sample is to be analyzed for bacteriological parameters, collect it directly
				in a presterilized sample container.
7. If a sample is to be analyzed for oil and
				grease or for petroleum hydrocarbons, the following procedure shall be
				followed:
i. Collect the sample directly into
				the sample bottle;
ii. Use a
				one-liter glass bottle fitted with a Teflon(R)-lined screw cap or ground glass
				stopper;
iii. Leave a one-inch air
				space inside the sample bottle. Do not overflow the sample bottle allowing the
				oil and grease phase to flow out of the bottle;
iv. Do not transfer the sample into another
				bottle for analysis;
v. Use all of
				the sample, rather than an aliquot portion of the sample, for
				analysis.
vi. Before taking the
				sample from a closed conduit via a valve or faucet arrangement, allow enough
				water to flush through the valve or faucet prior to filling the bottle in order
				to obtain a representative sample;
vii. Representative grab samples taken from
				an open channel must be obtained at one of the following locations:
(1) Where the Froude number equals or exceeds
				1 at the time of sampling and at least 90 percent of the time when a discharge
				exists. The Froude number is computed according to the following formula:
Click here to
				  view image.
(2)
				Immediately downstream of a hydraulic jump; or
(3) From a sampling point located immediately
				after a V-notch weir, properly installed as a flow measuring device.
viii. Representative grab samples
				taken from a closed conduit must be obtained at a point where the Reynolds
				number exceeds 4,000 at the time of sampling and at least 90 percent of the
				time when a discharge exists. The Reynolds number is computed according to the
				following formula:
Click here
				  to view image.
Temperature
v
32[degrees]F
1.931 ft<2>/sec x 10<-5>
40[degrees]F
1.664 ft<2>/sec x 10<-5>
50[degrees]F
1.410 ft<2>/sec x 10<-5>
60[degrees]F
1.217 ft<2>/sec x 10<-5>
70[degrees]F
1.059 ft<2>/sec x 10<-5>
80[degrees]F
0.930 ft<2>/sec x 10<-5>
90[degrees]F
0.826 ft<2>/sec x 10<-5>
100[degrees]F
0.739 ft<2>/sec x 10<-5>
110[degrees]F
0.667 ft<2>/sec x 10<-5>
120[degrees]F
0.609 ft<2>/sec x 10<-5>
ix.
				The discharger shall document the sampling methodology, and shall make the
				documentation available to the Department.
x. Samples to be analyzed for oil and grease
				or petroleum hydrocarbons may be collected pursuant to an alternate sampling
				protocol approved in writing by the Department. The Department shall not
				approve an alternate sampling protocol unless it determines that the alternate
				protocol will result in the collection of representative samples.
8. Samples to be analyzed for
				pesticides, herbicides or PCBs, shall be collected in bottles at least one
				liter in size, which have been cleaned to remove all traces of these compounds
				and then rinsed with pesticide grade solvents before drying.