Changes to Core Firm Storage Rights

Friday, October 21, 2016


Advice 3734-G has been approved by the CPUC.

---Original Message 10/19/2016 08:00 a.m ----

Changes to Core Firm Storage Injection & Withdrawal Rights

Effective November 1, 2016, revisions will be implemented for PG&E’s gas schedule G-CT (Core Gas Aggregation Service) and gas schedule G-CFS (Core Firm Storage), in compliance with Decision 16-06-056. Pending final disposition, per Advice Filing 3734-G, the Decision includes the following changes to core firm storage injection and withdrawal rights:

Regardless of annual inventory, injection during the summer months and withdrawal during the winter months for all G-CFS customers will be variable. Countercyclical injection and withdrawal remain unchanged.

Starting in November the variable injection and withdrawal capacity (Dth/day) will change depending on the following variables.

  • AI = Annual Inventory 
  • CI = Current Inventory (Balance) 
  • WA = Withdrawal Adjustment

Injection Capacity (April through October) = [(AI * 207) – (CI * 92)] / 33,478

Withdrawal Capacity (November through March) = [AI * (970 + WA) + (CI * 283)] / 33,478

Time Period Withdrawal Adjustment (WA) Values
11/1 11/30 0
12/1 1/15 122
1/16 1/31 100
2/1 2/14 -50
2/15 2/29 -100
3/1 3/31 -250

Countercyclical injection and withdrawal capacity = (AI / 33,477,700) * 50,000

Introducing a New Tool to Assist with Transition

PG&E’s California Gas Transmission has created a new Excel tool to assist with this transition. In addition to the daily push notification e-mails and the 572 Report in INSIDEtracc, this tool will illustrate how the injection and withdrawal capacities change based on your annual and current inventory, depending on the season.

The tool is for illustrative purposes only and is not meant to be used as an official representation of actual MDQs.

We appreciate all of your input as we continually work on our goal of providing you excellent customer service. If you have any questions about the effective changes or the new tool, please do not hesitate to contact your CGT Account Manager.

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