NR 440.647(6)(j)1.c. c. For those determining compliance with sub. (3) (c) 1. b. 3) or 2. b. 3) the owner or operator may elect to reduce the sampling program to any 14 consecutive day period once every 2 calendar months, if at least 17 consecutive 14-day rolling average concentrations immediately preceding the reduced sampling program are each less than 1.8 weight percent ethylene glycol. If the average concentration obtained over the 14 day sampling during the reduced test period exceeds the upper 95% confidence interval calculated from the most recent test results in which no one 14-day average exceeded 1.8 weight percent ethylene glycol, then the owner or operator shall reinstitute a daily sampling program. A reduced program can be reinstituted if the requirements specified in this paragraph are met.

NR 440.647(6)(j)1.d. d. The upper 95% confidence interval shall be calculated using the following equation:

(

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=

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where:

Xi is the daily ethylene glycol concentration for each day used to calculate the 14-day rolling average used in test results to justify implementing the reduced testing program

n is the number of ethylene glycol concentrations

NR 440.647(6)(j)2. 2. Measuring an alternative parameter, such as carbon oxygen demand or biological oxygen demand, that is demonstrated to be directly proportional to the ethylene glycol concentration. The parameter shall be measured during the initial 14-day performance test during which the facility is shown to be in compliance with the ethylene glycol concentration standard whereby the ethylene glycol concentration is determined using the procedures described in subd. 1. The alternative parameter shall be measured on a daily basis and the average value of the alternative parameter shall be calculated on a daily basis over a rolling 14-day period of operating days. Each daily average value of the alternative parameter constitutes a performance test.

NR 440.647(7) (7) Reporting and recordkeeping requirements.

NR 440.647(7)(a) (a) Each owner or operator subject to the provisions of this section shall keep an up-to-date, readily-accessible record of the following information measured during each performance test and shall include the following information in the report of the initial performance test in addition to the written results of such performance tests as required under s. NR 440.08. Where a control device is used to comply with sub. (3) (a) 1. a. 4) only, a report containing performance test data need not be submitted, but a report containing the information in subd. 11. is required. Where a boiler or process heater with a design heat input capacity of 150 million Btu/hr or greater is used to comply with sub. (3) (a) a report containing performance test data need not be submitted, but a report containing the information in subd. 2. a. is required. The same information specified in this subsection shall be submitted in the reports of all subsequently required performance tests where either the emission control efficiency of a combustion device or the outlet concentration of TOC, minus methane and ethane, is determined.

NR 440.647(7)(a)1. 1. When an incinerator is used to demonstrate compliance with sub. (3) except sub. (3) (a) 2.:

NR 440.647(7)(a)1.a. a. The average firebox temperature of the incinerator (or the average temperature upstream and downstream of the catalyst bed), measured at least every 15 minutes and averaged over the performance test period, and

NR 440.647(7)(a)1.b. b. The percent reduction of TOC (minus methane and ethane) achieved by the incinerator, the concentration of TOC (minus methane and ethane) (ppmv, by compound) at the outlet of the control device on a dry basis or the emission rate in terms of kg TOC (minus methane and ethane) per Mg of product (lb TOC/ton) at the outlet of the control device, whichever is appropriate. If supplemental combustion air is used, the TOC concentration corrected to 3% oxygen shall be recorded and reported.

NR 440.647(7)(a)2. 2. When a boiler or process heater is used to demonstrate compliance with sub. (3) except sub. (3) (a) 2.:

NR 440.647(7)(a)2.a. a. A description of the location at which the vent stream is introduced into the boiler or process heater, and

NR 440.647(7)(a)2.b. b. For boilers or process heaters with a design heat input capacity of less than 150 million Btu/hr, all 3-hour periods of operation during which the average combustion temperature was more than 28°C (50°F) below the average combustion temperature during the most recent performance test at which compliance was determined.

NR 440.647(7)(a)3. 3. When a flare is used to demonstrate compliance with sub. (3) except sub. (3) (a) 2.:

NR 440.647(7)(a)3.a. a. All visible emission readings, heat content determinations, flow rate measurements and exit velocity determinations made during the performance test,

NR 440.647(7)(a)3.b. b. Continuous records of the pilot flame heat-sensing monitoring, and

NR 440.647(7)(a)3.c. c. Records of all periods of operations during which the pilot flame is absent.

NR 440.647(7)(a)4. 4. When an incinerator, boiler or process heater is used to demonstrate compliance with sub. (3) (a) 2., a description of the location at which the vent stream is introduced into the incinerator, boiler or process heater.

NR 440.647(7)(a)5. 5. When a flare is used to demonstrate compliance with sub. (3) (a) 2.:

NR 440.647(7)(a)5.a. a. All visible emission readings made during the performance test,

NR 440.647(7)(a)5.b. b. Continuous records of the pilot flame heat-sensing monitoring, and

NR 440.647(7)(a)5.c. c. Records of all periods of operation during which the pilot flame is absent.

NR 440.647(7)(a)6. 6. When an absorber is the final unit in a system to demonstrate compliance with sub. (3) except sub. (3) (a) 2., the specific gravity, or alternative parameter that is a measure of the degree of absorbing liquid saturation, if approved by the department, and average temperature, measured at least every 15 minutes and averaged over the performance test period, of the absorbing liquid, both measured while the vent stream is normally routed and constituted.

NR 440.647(7)(a)7. 7. When a condenser is the final unit in a system to demonstrate compliance with sub. (3) except sub. (3) (a) 2. the average exit (product side) temperature, measured at least every 15 minutes and averaged over the performance test period while the vent stream is normally routed and constituted.

NR 440.647(7)(a)8. 8. Daily measurement and daily average 14-day rolling average of the ethylene glycol concentration in the liquid effluent exiting the vacuum system servicing the polymerization reaction section, if an owner or operator is subject to sub. (3) (c) 1. b. 2) or 2. b. 2) or of the ethylene glycol concentration in the cooling water in the cooling tower, if subject to sub. (3) (c) 2. b. 3) or c. 3).

NR 440.647(7)(a)9. 9. When a carbon adsorber is the final unit in a system to demonstrate compliance with sub. (3) except sub. (3) (a) 2., the concentration level or reading indicated by the organics monitoring device at the outlet of the adsorber, measured at least every 15 minutes and averaged over the performance test period while the vent stream is normally routed and constituted.

NR 440.647(7)(a)10. 10. When an owner or operator seeks to comply with the requirements of this section by complying with the uncontrolled threshold emission rate cutoff provision in sub. (1) (d) and (e) or with the individual stream exemptions in sub. (1) (g), each process operation variable, for example, pressure, temperature, type of catalyst, that may result in an increase in the uncontrolled emission rate, if sub. (1) (d) or (e) is applicable or in an increase in the uncontrolled annual emissions or the VOC weight percent, as appropriate, if sub. (1) (g) is applicable, should such operating variable be changed.