UNITED5TATESENVlAONMENTALPROTECTIONAGENCY
ReGION i 123!iMission Street San**Franci~o.** CA941o:l

April 11, 1990 

## RECE1VEO 

## APR201990**F~ank** R. schmidt, P.E. 

### Manville Sales Corporation P.O. Box SlOS 

### Denver, CO 80217-3108
Dear Mr. Schmidt: 

### IN REPLY REFER TO: A-3-1 NSR 4-4-4 SAC 77-07

This is in response to 

### your March 2, 1990**le~ter** requesting
an 

### amendment to the 

### prevention of Significant Deterioration (PSD) permit (NSR 4-4-4; SAC 77-07) issued to Manville Salas 

### Co:-poration on october 3, 1978 for the expansion**an~** modification of the existing fiber 

### glass manufacturing plant located in Willows, California. According to 

### Manville,**du~** to 

### an informational error**i~** 

### the December 7, 1988 permit amendment**requ~st,** EPA's amendment to the permit on November 16, 1979,**wh~ch** set**~~e** emissions 

### from the Llne132 HERM collection process on a per module basis as opposed to 

### a per unit (or stack) basis, 

### was not incorporated in 

### the April 6, 1989 

### amendment. Manville corporation has requested that·EPA modify the permit to correct the Qmission and revise the emission

. limit of 3.79 pounds per hour per unit (Qr stack} to 7 ..58 pounds per hour per module.
After reviewing Manville's amendment request, EPA nas deter

### mined that the current permitted emission limits are a result of
an administrative error 

### and that the requested permit**~odifica** tion will not Change the total allowabla emissions from the

### collaction stacks. Therefore, EPA 

### will amE,lnd this correction to the 

### pso 

### permit (as amended on 

### November 16, 1979 and April 6, 1989) as requested by Manville Sales CorpQration. All**o~~er pe~it**  conditions 

### are unchanqed and 

### will remain in**ef~ect.**Should you.,,\;),ave any question rega::-ding this**mat~e::-,** please contact Nancy Rumrill of our New Source Section at (415) 556- 5569.

Sincerely, 

# ,.,'

" / I**rr;~'i/1.M~::"---.~**

## ~Vid P. Director Air and Toxies Division

Enclosure

ee: Ray Menebroker, CARB 

### Ed Romano, Glenn 

### County 

### APeD

-..

;**.~.-** ...Amendments to the October 3, 1978 

### Approval to Construct (NSR 4-4-4, SAC 77-07)

The October 3, 1978, Approval to**Construc~** (as amended on November 16, 1979 and April 6, 1989) .fs**he~eby.** amended.

The EPA amends Special Condition VIII.S. to read 

### as.follows:

B. tmissionLimits for particulate Matter


### On and 

### after the date of startup of the equipment for 'which the performance tests 

### requi::-ed to be conducted by Special Condition A above is**ini~iated,** Manville Sales Corporation 

### shall not discharge or cause 

### the discharge into the**a~mosphere** from the subject 

### equipment any gases which contain particulate matter in excess of the amounts**indica~ed** below for**~he** follcwing sources:

LTNt; 132 (HER.?!}.
Source No.

1 2-7

8 9 10-12 13 14 15 16-17 18,38-40

LIN]; 1J3 (HER.'11
Source No.

19-26 27 28-30 :31 32 33-35 36 37 operation
Melter 

### collection CUring Cooling Mixed Batch Day Bin 

### storage 

### Bin Blender 

### Receiver Wool Blowing CUllet

operation


### Silos Melter Collection 

### CUrinq Coolinq Mixed Batch 

### Day Sin Storage Bin Blender/Receiver Maximum Ibs/hr

1.25 7.58 (per mcdtlle) 5.00 0.76 0.20 (per unit) 0.20 0.20 0.20 0.10 (per unit) 0.01 (per unit)

Maximum Ibs/hr
0.20* 1.25 7.58 (pe-r unit) 5.00 0.76 0.20 {per unit} 0.20 0.40



### * only one silo is permitted to 

### operate at anyone time.
All other permit conditions are unchanqed and remain in effect.