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OAR Box 1875 

Prepped by Ollie Stewart 

Document Number: 

81) ll-F-28 

Docket Number: 

A-90-19 

Printed 12/1/200811:12:49 AM Sheet 81 of 86 
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A-90-19 

ll-F-28 

TO: Troy Hillier 

FROM: Linda Herring ^ i n ^ i(l/i/u*tf 

DATE: October 21, 1992 

Attached is a revision to the banking language for the HON 

which we discussed with you yesterday. The changes are marked in 

the margin. Please call me at (919) 541-5358 if you have any 

questions before our discussion this afternoon. 

^yc. 
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VvJuabo 

the owner or operator may use banked credits and credits from the' 

relevant compliance period to offset the debits. If banked credits 

are available and necessary, compliance shall be judged based on 

the sum of banked credits and credits from the relevant compliance 

period, averaged with debits from the relevant compliance period. 

(i) If the credits calculated according to paragraph (g) are 

greater than the debits calculated for the same annual compliance 

period according to paragraph (f), the owner or operator may bank 

the extra credits for use in future compliance periods. 

(A) In order to bank credits for use in future compliance 

periods, the owner or operator must report the data used to 

calculate that the extra credits were generated and certify the 

accuracy of that data in the Periodic Reports as specified in ??? 

63.152(c) of this Subpart. These records must be readily 

accessible for 5 years after the period in which the credit is used 

jr*«TM~*\ as specified in ????63.150(e) (3) (iv) . 

•yru (B) The owner or operator may choose to include more than the 

0y ^fjg^^*^ required number of credit generating emission points in an average 

^aj^Jedy in order to increase the likelihood of creating bankable credits. 

ri However, these additional points are not required to create 

Jxjjkv*-

^*".. . bankable credits. 

(ii) Banked credits can only be used to comply with the 

annual requirement specified in ??? 63.150(e)(3). Banked credits 

cannot be used for the quarterly requirement specified in ??? 

63.150(e)(4). 

(iii) Banked credits alone cannot be used to offset use of 

emission control less stringent than the reference control 
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r technology on a Group l emission point unless: 

(A) It is a point that previously was not included in the 

source's emissions average; and 

(B) The banked credits are only being used until the time 

that either the point is controlled with reference control 

technology or one or more other emission points are added to the 

average that generate enough credits to offset its emissions. The 

time that banked credits can be used for this purpose is not to 

exceed one year. 

(iv) In the Implementation Plan for emissions averaging as 

specified in ???? 63.151(c) and (d) or the operating permit 

application as specified in ????63.152(e), the credit-generating 

emission points must be capable of generating sufficient credits to 

offset the debits from the debit-generating emission points under 

representative operating conditions. The owner or operator shall 

not develop an Implementation Plan or operating permit application 

for emissions averaging that relies on banked credits to ensure 

that credits will exceed debits. Such an averaging plan would not 

be approved. 

(iv) The length of time that banked credits shall be 

available for use after the year in which the extra credit was 

generated is (a range of 2 to 5 years is being proposed; a single 

number will be selected at promulgation.) If a banked credit is 

not used within (2 to 5) years after the year in which it was 

generated, it is no longer available for use. 

^