Colorado GP summary

summary of natural gas compressor engine requirements in the General Permits issued by Colorado

Table 1 (from II.B.3.a of GP02, with federal limits interpolated for purpose of comparison)
maximum engine HP	engine design	emission standards in g/hp-hr
		NO_x		CO		VOC
		Colo.	JJJJ	Colo.	JJJJ	Colo.	JJJJ
.GE. 100 and .LT. 500	rich burn	2.0		4.0		1.0
.GE. 100 and .LT. 500	lean burn	2.0		4.0		1.0
.GE. 500	rich burn	0.7		1.5		1.0
.GE. 500	lean burn	2.0		1.5		0.7

Table 2 (from II.B.3.b of GP02, with federal limits interpolated for purpose of comparison) "State-only Engine Requirements per Regulation No. 7, Section XVII.E. Emissions from natural gas fired reciprocating internal combustion engines that are greater than or equal to 100 hp and constructed in⁽¹⁾ or relocated to the state of Colorado from another state on or after the applicable date, shall not exceed the emission standards in Table 2 . . ."
maximum engine HP	construction or relocation date on or after	emission standards in g/hp-hr
		NO_x		CO		VOC⁽²⁾
		Colo.	JJJJ	Colo.	JJJJ	Colo.	JJJJ
.GE. 100 and .LT. 500	Jan. 1, 2011	1.0		2.0		0.7
.GE. 500	July 1, 2010	1.0		2.0		0.7

⁽¹⁾ The word "in" appears extraneous to me. Nobody cares in what state the engine is manufactured, is how I read the intended meaning.
⁽²⁾ I haven't noticed an exclusion of formaldehyde from the definition of VOC in the Colorado regulations (as in Table 1 to Subpart JJJJ of Part 60), although I haven't looked for it.

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dkt
4/15/15