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Revised Cal. P.U.C. Sheet No. 18839-E Pacific Gas and Electric Company

Revised
Cal. P.U.C. Sheet No. 18839-E
Pacific Gas and Electric Company
Cancelling Revised Cal. P.U.C. Sheet No. 18427-E
San Francisco, California

Advice Letter No. 2234-E
Issued by
Date Filed
April 29, 2002
Decision No. 02-04-060
Karen A. Tomcala
Effective
May 7, 2002


Vice President
Resolution No.

46198
Regulatory Relations

SCHEDULE E-OBMCOPTIONAL BINDING MANDATORY CURTAILMENT PLAN

APPLICABILITY:
An Optional Binding Mandatory Curtailment (OBMC) Plan may be an alternative to a
rotating outage (RO) for certain customers. Under an OBMC Plan, PG&E may authorize
a customer to reduce their demand to an agreed upon level in lieu of being included in
PG&Es rotating outage (RO) block progression. This schedule is open to all PG&E
customers who can meet the eligibility requirements. An eligible customer should submit
its OBMC Plan to PG&E for review and acceptance. If the plan is approved by PG&E,
PG&E will send such approval to the customer in writing. The written approval letter will
specify the effective start date of the plan.

PROGRAM
OPERATIONS:
PG&E shall require a customer to operate its OBMC Plan upon each and every notice
from the California Independent System Operator (CAISO) that a firm load curtailment is
required within the PG&E service territory. Additionally, PG&E reserves the right to
require a customer to operate its OBMC Plan when PG&E or the ISO has initiated or is
planning to initiate firm load curtailments in a local geographic area within the PG&E
service territory. OBMC Plan curtailments shall be required concurrent with each and
every firm load curtailment.
Upon notification from PG&E of an OBMC curtailment, OBMC customers must
immediately commence implementation of the load curtailment measures contained in
their load reduction plan. Upon notice from PG&E, OBMC customers are required to
reduce their load such that the load on their circuit or dedicated substation is at or below
the Maximum Load Level (MLL) corresponding to the percent load reduction
communicated in the notice.
The MLLs correspond to a reduction in a circuits loading of between five (5) and fifteen
(15) percent in five (5) percent increments. The CAISO may call for load reductions on a
required MW level, but PG&E will require the OBMC customers to reduce their load to
the next highest five (5) percent increment. For each operation, PG&E will notify the
customer of the required percent reduction, along with the start and end times for the
OBMC operation. PG&E may extend the end time or increase the percentage reduction
of any ongoing OBMC operation as necessary to correspond with CAISO directives.
Maximum Load Levels (MLLs) shall be established by PG&E for the circuit or dedicated
substation, which correspond to each of the 5, 10, and 15 percent load reduction levels.
The following MLL calculation methodology shall apply for a) customers not participating
in a capacity interruptible program, b) customers participating in a capacity interruptible
program where the customers baseline is less than the customers capacity interruptible
program firm service level (FSL), and c) customers participating in a capacity
interruptible program where the customer has met their monthly or annual curtailment
obligation. The MLL for the 5 percent load reduction is equal to the product of the
baseline times 0.95. The MLL for the 10 percent load reduction is equal to the product
of the baseline times 0.90. The MLL for the 15 percent load reduction is equal to the
product of the baseline times 0.85.





























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(Continued)

Revised
Cal. P.U.C. Sheet No. 18840-E*
Pacific Gas and Electric Company
Cancelling Revised Cal. P.U.C. Sheet No. 18441-E
San Francisco, California

Advice Letter No. 2234-E
Issued by
Date Filed
April 29, 2002
Decision No. 02-04-060
Karen A. Tomcala
Effective
May 7, 2002


Vice President
Resolution No.

46226
Regulatory Relations

SCHEDULE E-OBMCOPTIONAL BINDING MANDATORY CURTAILMENT PLAN
(Continued)

PROGRAM
OPERATIONS:
(Contd.)
The following MLL calculation methodology shall apply for customers participating in a
capacity interruptible program where the customer has not met their monthly or annual
curtailment obligation and the customers FSL under that program is less than the
customers baseline. The MLL for the 5 percent load reduction is equal to the product of
the FSL times 0.95. The MLL for the 10 percent load reduction is equal to the product of
the FSL times 0.90. The MLL for the 15 percent load reduction is equal to the product of
the FSL times 0.85. Customers participating in a capacity interruptible program who
complete their monthly or annual capacity interruptible program curtailment obligation
during a concurrent OBMC curtailment must continue to curtail from the lower of the FSL
or OBMC baseline until the conclusion of the OBMC curtailment.
The baseline for determining MLLs is equal to the average recorded hourly usage
amount (if available) for the same hours as the OBMC operation hours on the immediate
past 10 similar days, excluding days when the customer was paid to reduce load under
PG&Es Demand Bidding Program and days when the OBMC program operated. For
establishing similar days, if the OBMC event is called on a business day, then 10 prior
business days are used; if the OBMC event is called on a weekend or holiday, then 10
prior weekend and holidays are used. The load measurements for the circuit shall be
taken at PG&E's distribution substation.
Each calendar year an OBMC participant may exclude the following periods from the 10-
day baseline: (a) a period of 15 calendar days designated in advance both for ramp-up
and ramp-down of operations during which period the baseline will be the hourly average
circuit load for the most recent prior day; (b) up to 10 days as determined by the
customer and designated in advance to accommodate conditions in the customers
operations that affect the 10-day baseline; and (c) up to two days as determined by the
customer where unplanned outages or other events cause the circuit load to deviate
substantially from normal conditions. The customer shall provide a minimum of
10 calendar days prior notice to PG&E when exercising option (a); a minimum of
7 calendar days prior notice to PG&E when exercising option (b); and notice to PG&E
within one calendar day after the outage or event when exercising option (c). Customer
requests for the above exclusions must be received by PG&E in written or email format
within the specified time frames or the requested exclusion will not be allowed.
Customers requesting an operation ramp-up period under option (a) above must also
specify a commensurate operation ramp-down period occurring within one year of the
ramp-up period. The 10-day baseline following the ramp-down period must be reduced
a minimum of 25% from the 10-day baseline immediately prior to the ramp-down period.
Customers failing to achieve a 25% reduction in the 10-day baseline following a ramp-
down period will not be allowed future operation ramp-up periods for two years following
the ramp-up period.
Required load reductions must be achieved as quickly as possible but no later than
15 minutes after the primary customer receives notification from PG&E. OBMC
customers who fail to curtail to or below the required MLL of their circuit within the
specific amount of time or who fail to maintain the MLL for the entire duration of the
OBMC operation shall be subject to the non-compliance penalties specified below.
An OBMC Plan is not a guarantee against a customer being subject to a RO, because
daily and emergency circuit switching may cause the circuit to become subject to ROs.

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(Continued)

Revised
Cal. P.U.C. Sheet No. 18429-E
Pacific Gas and Electric Company
Cancelling Revised Cal. P.U.C. Sheet No
18299-E
San Francisco, California

Advice Letter No. 2133-E
Issued by
Date Filed
July 3, 2001
Decision No. 01-04-006,01-05-090,
DeAnn Hapner
Effective
July 8, 2001
01-06-087
Vice President
Resolution No.

44861
Regulatory Relations

SCHEDULE E-OBMCOPTIONAL BINDING MANDATORY CURTAILMENT PLAN
(Continued)
PROGRAM
OPERATIONS:
(Contd.)
The customer may not receive advance notice from PG&E of such a RO. Additionally,
an OBMC Plan is applicable to only electrical emergencies requiring a rotation outage,
and it does not prevent a customer from being subject to outages caused by other load
shedding schemes. All customers involved in a particular OBMC Plan must be served
from the same circuit unless expressly agreed to by PG&E.
A single OBMC Plan shall be req