Oklahoma department of environmental quality

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D.2.6. SIGNIFICANT IMPACT ANALYSIS

Purpose and Methodology

The significant impact analysis is the first phase of the Source Impact Analysis and determines two results: 1) the maximum impacts from the project emissions increase and 2) the location of predicted impacts greater than significant impact levels (SILs). The area of these impacts defines the impact area of the project and the significant impact distance (SID).

G-P performed a significant impact analysis to determine whether the emission increases result in maximum predicted impacts greater than the PSD modeling SILs or the EPA monitoring de minimis concentrations. Current EPA and ODEQ policies stipulate that G-P compare the highest predicted short-term impacts to these levels. Table D-3 presents the SILs and de minimis concentrations.
Table D-3

Pollutant	Averaging Time	Significant Impact Levels (μg/m³)	De Minimis Concentration (μg/m³)
PM₁₀	24-hour	5	10
PM₁₀	Annual	1	--
NO₂	Annual	1	14
SO₂	3-hour	25	--
	24-hour	5	13
	Annual	1	--
CO	1-hour	2,000	--
CO	8-hour	500	575

Model Inventory

For the significant impact analysis, the model inventory only includes point and fugitive sources that will experience an increase or decrease in emissions due to the project. The emission increase represents two sets of sources. For sources physically modified, G-P determined an emission increase by calculating the difference between the potential maximum emissions limited by permit or source capacity, and the actual level of emissions for the period 2002-2003. G-P calculated annual and short-term average emission changes. Table D-4 presents the baseline emissions, potential emissions and computes the difference in particulate matter (PM₁₀) emissions from the modified project sources.

Table D-4		PM₁₀ Significant Impact Analysis Emiss. Rates
Model ID	Source Description	Baseline (TPY)	Potential (TPY)	Project (TPY)	Project (g/s)
No. 11 and 12 Paper Machines (a) (b)
1112_8	PM 11 Yankee Wet End Exh. - process	1.16	2.19	2.17	0.062
	PM 11Yankee Wet End Exh. - burner	0.26	1.40
	PM 11 Yankee Wet End Exh. - total	1.42	3.59
1112_7	PM 11 Yankee Dry End Exh. - process	1.16	2.19	2.17	0.062
	PM 11Yankee Dry End Exh. - burner	0.26	1.40
	PM 11 Yankee Dry End Exh. - total	1.42	3.59
1112_20	PM12 Yankee Exh -process	3.71	6.13	4.32	0.124
	PM12 Yankee Exh -burner	0.90	2.80
	PM12 Yankee Exh -total	4.61	8.93
1112_1	Building Exhaust	0.35	0.61	0.26	0.0077
1112_2	Building Exhaust	0.35	0.61	0.26	0.0077
1112_3	Building Exhaust	0.35	0.61	0.26	0.0077
1112_4	Building Exhaust	0.35	0.61	0.26	0.0077
1112_5	Building Exhaust	0.35	0.61	0.26	0.0077
1112_9	Building Exhaust	0.35	0.61	0.26	0.0077
1112_10	Building Exhaust	0.35	0.61	0.26	0.0077
1112_11	Building Exhaust	0.35	0.61	0.26	0.0077
1112_13	Building Exhaust	0.35	0.61	0.26	0.0077
1112_14	Building Exhaust	0.35	0.61	0.26	0.0077
1112_15	Building Exhaust	0.35	0.61	0.26	0.0077
1112_17	After Dryer Exh.	0.29	0.51	0.22	0.0064
1112_18	After Dryer Exh.	0.29	0.51	0.22	0.0064
1112_19	After Dryer Exh.	0.29	0.51	0.22	0.0064
1112_22	Vacuum Pump	0.18	0.31	0.13	0.0039
1112_23	Vacuum Pump	0.18	0.31	0.13	0.0039
1112_24	Former Exh	0.37	0.65	0.28	0.0082
1112_25	Fan Pump Silo	0.04	0.07	0.03	0.00091
1112_26	Wall Exh.	0.18	0.31	0.13	0.0039
1112_28	Wall Exh.	0.18	0.31	0.13	0.0039
1112_29	Fan Pump Silo	0.04	0.06	0.03	0.0008
1112_30	Former Exh	0.36	0.63	0.27	0.0079
1112_31	Wall Exh.	0.18	0.31	0.13	0.0039
1112_27	Wall Exh.	0.18	0.31	0.13	0.0039
1112_32	Wall Exh.	0.18	0.31	0.13	0.0039
Paper Machine 13
13_13	Yankee Economizer - burner	0.729	2.796	3.92	0.113
	Yankee Economizer - process	3.406	5.256
	Yankee Economizer - total	4.135	8.052
13_1	Roof Exhausts	0.30	0.47	0.17	0.005
13_2	Roof Exhausts	0.30	0.47	0.17	0.005
13_3	Roof Exhausts	0.30	0.47	0.17	0.005
13_4	Roof Exhausts	0.30	0.47	0.17	0.005
13_5	Roof Exhausts	0.30	0.47	0.17	0.005
13_6	Roof Exhausts	0.30	0.47	0.17	0.005
13_7	Roof Exhausts	0.30	0.47	0.17	0.005
13_10	After Dryer Hood Exh	0.56	0.86	0.30	0.009
13_14	Fan Pump Silo	0.06	0.09	0.03	0.001
13_17	Vacuum Pump	0.25	0.39	0.14	0.004
13_18	Former Exh	0.41	0.64	0.22	0.006
13_19	Wall Exh. Fan	0.21	0.33	0.11	0.003
13_20	Wall Exh. Fan	0.21	0.33	0.11	0.003
Paper Machine 14
14_13	Yankee Wet End Exh. - burner	0.255	1.398	1.968	0.057
	Yankee Wet End Exh. - process	1.803	2.628
	Yankee Wet End Exh. - total	2.058	4.026
14_17	Yankee Dry End Exh.burner	0.255	1.398	1.968	0.057
	Yankee Dry End Exh.process	1.803	2.628
	Yankee Dry End Exh. total	2.058	4.026
14_1	Vacuum Pump exh.	0.18	0.26	0.08	0.010
14_2	Building exh.	0.33	0.48	0.15	0.002
14_3	Building exh.	0.33	0.48	0.15	0.004
14_4	Building exh.	0.33	0.48	0.15	0.004
14_5	Building exh.	0.33	0.48	0.15	0.004
14_6	Building exh.	0.33	0.48	0.15	0.004
14_7	Building exh.	0.33	0.48	0.15	0.004
14_8	Building exh.	0.33	0.48	0.15	0.004
14_9	Building exh.	0.33	0.48	0.15	0.004
14_10	Fan Pump Silo Exh.	0.27	0.40	0.13	0.004
14_11	Former Exh.	0.32	0.46	0.15	0.004
14_20	Wall Exh. Fan	0.27	0.40	0.13	0.004
14_21	Wall Exh. Fan	0.27	0.40	0.13	0.004
14_22	Wall Exh. Fan	0.27	0.40	0.13	0.004
Paper Machine 15
15_13	Yankee Wet End Exh. - burner	0.214	0.999	1.427	0.041
	Yankee Wet End Exh. - process	1.778	2.420
	Yankee Wet End Exh. - total	1.992	3.419
15_18	Yankee Dry End Exh.burner	0.214	0.999	1.427	0.041
	Yankee Dry End Exh.process	1.778	2.420
	Yankee Dry End Exh. total	1.992	3.419
15_11	Riffler Roof Exhaust	0.20	0.28	0.074	0.002
15_12	Former Exhaust w/ separator	0.50	0.67	0.179	0.005
15_2	Roof Exh.	0.28	0.39	0.102	0.0029
15_3	Roof Exh.	0.28	0.39	0.102	0.0029
15_4	Roof Exh.	0.28	0.39	0.102	0.0029
15_5	Roof Exh.	0.28	0.39	0.102	0.0029
15_6	Roof Exh.	0.28	0.39	0.102	0.0029
15_7	Roof Exh.	0.28	0.39	0.102	0.0029
15_8	Roof Exh.	0.28	0.39	0.102	0.0029
15_9	Roof Exh.	0.28	0.39	0.102	0.0029
15_22	Roof Exh.	0.28	0.39	0.102	0.0029
15_1	Vacuum Pump Silo	0.34	0.46	0.123	0.0035
15_19	Wall Fan	0.24	0.32	0.085	0.0025
15_20	Wall Fan	0.24	0.32	0.085	0.0025
15_21	Fan Pump Silo	0.14	0.20	0.052	0.0015

Directory: apps -> nondiv -> permitspublic -> storedpermits
apps -> Before the Federal Communications Commission Washington, D
apps -> Before the Federal Communications Commission Washington, D
apps -> Before the Federal Communications Commission Washington, D
apps -> Before the Federal Communications Commission Washington, D
apps -> Before the Federal Communications Commission Washington, D
apps -> Federal Communications Commission fcc 15-77 Before the Federal Communications Commission
apps -> Statement of commissioner ajit pai
storedpermits -> Oklahoma department of environmental quality

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