UNITED 5TATES ENVlAONMENTAL PROTECTION AGENCY

ReGION i

123!i Mission Street

San Franci~o. CA941o:l

April 11, 1990

RECE1VEO

APR 20 1990

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 determined that the current permitted emission limits are a result of

an administrative error and that the requested permit ~odification 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]; 1 J 3 (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.