Re: FOLLOW-UP INFORMATION ON THROUGHPUT AND OPERATING HOURS

Maria, as per your request, please see the attached data:

All the below figures were calculated using the 4500 hp factor on the
mainline ( TCV-12 Clark ) units
and 450 hp on the ( 4520 Waukesha ) auxillary. Units 601, 602, and 603 are
the mainline units. Unit 621 is the
auxillary engine and runs back up power, if needed. The year 1997 was
figured by Kerry Welch who no longer is with us.
1998, 1999, and 2000 operating hours and fuel use numbers were calculated
using the spread sheet that was provided by our mechanical analyst.

Engine hours 601 602 603 621 Fuel Volume ( MM
scf / yr ) 601 602 603 621

1997 3818 1973 2847
337
27.98 27.98 27.98 3.53

1998 1564 70 993
24
62.43 2.79 39.64 .07

1999 457 186 218
78
18.24 7.43 8.70 .24

2000 426 747 2644
454
17.01 29.82 105.55 1.39

The total throughput on condensate has been ( 0 gallons ) for 1997, 1998,
1999, and 2000. This is due to the fact that our narutal gas supply changed
in 1997 to a more dry natural gas and therefore, there was no liquids
associated with the gas.

Again I apologize the inconsistency in the data. We have had employee
turnovers at the facility and different spreadsheets were used to provide the
information to the EPA. We are in the process of standardizing our data
collections to eleminate this problem in the future. I hope this information
will help in the permit review process. Again please accept my apologizes in
the data collection errors.

Okpala.Maria@epamail.epa.gov on 02/15/2001 01:50:35 PM
To: lcampbe@enron.com
cc:

Subject: FOLLOW-UP INFORMATION ON THROUGHPUT AND OPERATING HOURS

Please confirm the following throughput and operating hours. The
information below was given to me by Butch Russell

Compresssor Engine Operating hours for 1997 is 38.87 *106 hp-hr??" " " " " "?1998 is 11.82 * 106 hp-hr

Let me know the operating hours for 1999, and 2000. Which HP was used in
the calculation.

The throughput found in the application for 1998, the annual throughput
for condensate (gal/yr) is 115, 165 while the maximum hourly throughput
(gal/yr) is 2,500. The May 1999 data for both the annual throughput and
the maximum hourly throughput for May 1999 read 0. Please confirm this and
let me know.

Thanks