New Jersey Administrative Code
Title 7 - ENVIRONMENTAL PROTECTION
Chapter 27B - SAMPLING AND ANALYTICAL PROCEDURES
Subchapter 3 - AIR TEST METHOD 3: SAMPLING AND ANALYTICAL PROCEDURES FOR THE DETERMINATION OF VOLATILE ORGANIC COMPOUNDS FROM SOURCE OPERATIONS
Section 7:27B-3.11 - Procedures for the determination of volatile organic compounds emitted from transfer operations using a flame ionization detector (FID) or non-dispersive infrared analyzer (NDIR)
Universal Citation: NJ Admin Code 7:27B-3.11
Current through Register Vol. 56, No. 18, September 16, 2024
(a) The procedure in this section is applicable for the determination of the mass emission of VOC rates from the transfer or loading of gasoline. Any alternative test method shall be submitted to the Department for review pursuant to N.J.A.C. 7:27B-3.2(c), (d) and (e).
(b) This method is based upon one of the following two principles:
1. Flame Ionization, which involves ionization produced when the VOC in the sample is combusted in a hydrogen flame. The ions and electrons formed in the flame enter an electrode gap, decrease the gap resistance, and thus permit a current flow in an external circuit. The resulting current is proportional to the instantaneous concentration of the VOC; or
2. Non-Dispersive Infra-Red, which involves absorption of infrared energy when a band of infrared energy containing the proper frequencies is alternately passed through an absorption cell containing the organic vapor and a reference cell. The difference in absorption between the reference cell and the absorption cell containing the organic vapor is proportional to the instantaneous concentration of the organic vapor.
(c) The following is a summary of this method:
1. The instrument is calibrated with a propane or butane calibration gas to establish the response of the instrument. A representative sample of the VOC is drawn into the detector and the instrument response is recorded on a strip chart recorder. The total gas flow rate and the volume of gasoline pumped are determined for each five minute period. The mass emission rate of VOC is calculated as propane and the results are summed for each five minute period and reported as either percent control efficiency or pounds of VOC per 10,000 gallons of gasoline transferred.
2. For the purpose of this procedure, three separate test runs will be conducted. Each test run shall be conducted over a period of time during which at least 10,000 gallons of gasoline are transferred but in no case shall the test period be less than one hour in duration unless an alternative period shall be submitted to the Department for review pursuant to N.J.A.C. 7:27B-3.2(c), (d) and (e).
3. During each test run, all flanges, valves, connections and fittings shall be tested for leaks using the test procedures outlined in N.J.A.C. 7:27B-3.15.
(d) The following is a list of equipment used in this method:
1. Probe;
2. Temperature sensor;
3. Pump;
4. Flow meter: an appropriate flow measuring device as specified in EPA Method 2A or if testing a vapor incinerator Method 2B (N.J.A.C. 7:27B-3.18, Reference 16);
5. Needle valve;
6. Detector, as set forth below:
i. Flame ionization detector: the instrument shall be capable of meeting manufacturer's specifications by demonstration and those specifications listed in ii below;
ii. Non-Dispersive Infra-Red detector: the specifications are as follows:
(1) Linearity: the instrument response to propane or butane shall not deviate from linearity by more than five percent of the full scale value of the range being used;
(2) Zero drift: less than five percent of full scale per test period or one hour whichever is less;
(3) Span drift: less than five percent of full scale per test period or one hour whichever is less; and
(4) Response time: less than or equal to 30 seconds for 95 percent full scale.
7. Gas supplies:
i. Calibration gases: three manufacturer's certified propane mixture in the range of 1,000; 10,000; and 100,000 ppm and a propane standard for leak determination as specified in N.J.A.C. 7:27B-3.15;
ii. Zero gas;
iii. Fuel gas; and
iv. Combustion gas.
8. Sample line: Teflon or stainless steel tubing with Teflon or stainless steel fittings.
(e) The procedure for this section shall be as follows:
1. Calibrate and install a pressure measurement device (liquid manometer, magnehelic gauge, or equivalent instrument), capable of measuring up to 500 mm of water gauge pressure with +/- 2.5 mm of water precision.
2. Connect the pressure measurement device to a pressure tap in the terminals vapor collection system, located as closely as possible to the connection with the gasoline tank truck.
3. During the performance test, record the pressure every five minutes while a gasoline tank truck is being loaded, and record the highest instantaneous pressure that occurs during each loading. Every loading position shall be tested at least once during the performance test.
4. For the determination of volume at the exhaust vent, the following EPA reference methods shall be used (N.J.A.C. 7:27B-3.18, Reference 16):
i. Method 2B for combustion vapor processing systems; or
ii. Method 2A for all other vapor processing systems.
5. For the determination of VOC concentration at the exhaust vent, procedures outlined in N.J.A.C. 7:27B-3.7 shall be used. The calibration gas shall be either propane or butane.
6. Immediately prior to a performance test all potential sources of vapor leakage in the terminal's vapor collection system equipment shall be monitored for leaks using the procedures outlined in N.J.A.C. 7:27B-3.15. The monitoring shall be conducted only while a gasoline tank truck is being loaded. A reading of 100 percent lower explosive limit or greater of propane shall be considered a leak. All leaks shall be repaired prior to conducting the performance test.
i. All testing equipment shall be prepared and installed as specified in the appropriate test methods.
7. The volume of gasoline dispensed during the performance test period at all loading racks whose vapor emissions are controlled by the processing system being tested shall be determined. This volume may be determined from terminal records or from gasoline dispensing meters at each loading rack.
8. An emission testing interval shall consist of each five-minute period during the performance test. For each interval:
i. The reading from each measurement instrument shall be recorded; and
ii. The volume discharged and the average VOC concentration in the exhaust vent shall be determined, as specified in the appropriate test method. The average VOC concentration shall correspond to the volume measurement and shall be adjusted by the sampling system response time.
9. Unless specified by the Department, each performance test shall consist of not less than three separate and valid test runs. Each test run shall be conducted over a period of time during which at least 10,000 gallons of gasoline are transferred but in no case shall the test period be less than one hour in duration.
10. To determine the efficiency of a control device, simultaneous tests shall be conducted on the vapor in the gaseous stream displaced from the receiving vessel upstream of any vapor control system and at the exhaust vent of the control system.
(f) The calculations shall be performed as follows:
1. Calculate the mass emitted during each testing interval as follows:
2. Calculate the total VOC emitted during the test period by summing the lbs. VOC per each test interval as calculated in 1 above.
3. Calculate the efficiency of the emission control system as follows:
4. Calculate the total emission rate of the VOC in lbs per 10,000 gallons of gasoline transferred as follows:
(g) The test report shall include the following information submitted on the required reporting form found in Appendix B (any alternative reporting form shall be submitted to the Department for review pursuant to N.J.A.C. 7:27B-3.2(c) and (e)) :
1. A dimensioned sketch of the sampling location;
2. All flow rate data;
3. A sketch and/or description of the sampling system used;
4. The identity, concentration and means of verification for each standard used;
5. A description of the analysis instrument and the conditions of operation;
6. Sufficient details of the calculations to allow the results to be reproduced independently;
7. The emissions in lbs/10,000 gallons of gasoline transferred for each test;
8. The percent efficiency of the control device, if required;
9. Concentration of VOC in gas displaced from delivery vessel, volume percent, if required;
10. Operating conditions of the source operation; and
11. An explanation for any unusual procedures or results.
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