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Ronald van der Leeden
Regulatory Affairs
555 W. Fifth Street, GT14D6
Los Angeles, CA 90013-1011
Tel: 213.244.2009
Fax: 213.244.4957

August 10, 2017

Advice No. 5176
(U 904 G)
Public Utilities Commission of the State of California
Subject: Emergency Local Service Zone Curtailment Effective August 3, 2017
Southern California Gas Company (SoCalGas) hereby submits this Advice Letter to notify
the California Public Utilities Commission (Commission) and affected parties of a
curtailment event in its service territory.1
SoCalGas Rule No. 23, Section J, provides the following:
The Utility shall submit an Advice Letter to the Commission’s Energy Division
within five business days from the conclusion of a non-maintenance-related
curtailment. The filing shall state the facts underlying and the reasons for the
curtailment, shall demonstrate that the type of curtailment being declared
complies with the Utility’s tariffs, and shall set forth efforts the Utility has
taken to minimize or alleviate the curtailment. The filing shall be served by
electronic mail or overnight mail on affected noncore customers and posted
by the Utility on its Electronic Bulletin Board.
This Advice filing is being made consistent with that requirement.

Facts Underlying and Reasons for the Curtailment

SoCalGas initiated an emergency curtailment of service in the North LA Basin, South LA
Basin, Northern, and Southern System-West of Moreno Local Service Zones beginning at

SoCalGas is submitting this Advice Letter pursuant to Decision (D.) 16-07-008.


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Advice No. 5176 -2- August 10, 2017 6:00 p.m. on August 3, 2017. The emergency curtailment of service ended at 10:00 p.m. on August 3, 2017. A pipeline integrity inspection on a natural gas transmission line in the community of Devore revealed a condition that needed immediate attention. The condition is not a natural gas leak, and does not present a hazard to public safety or the environment. For safety purposes, SoCalGas reduced the pressure in the line to allow for inspection and the completion of any necessary remediation work. SoCalGas issued a system-wide Curtailment Watch effective 3:00 p.m. on August 3, 2017, and posted a maintenance outage including a capacity reduction on its Electronic Bulletin Board, ENVOY. The Curtailment Watch remained in effect during and after the emergency curtailment, and was ultimately lifted at 10:00 a.m. on August 7, 2017. The affected customers were electric generator customers located in the North LA Basin, South LA Basin, Northern, and Southern System-West of Moreno Local Service Zones, which are defined in SoCalGas’ tariff maps, Boundary Index Map of Local Service Zones and Territorial Boundary Lines of Local Service Zones. A list of the affected customers is provided in Attachment A. B. Compliance with SoCalGas’ Tariffs This curtailment was instituted in accordance with Section E of Rule No. 30, Interruption of Service and Section E of Rule No. 23, Curtailment Due to Emergency Conditions. Each affected noncore customer was provided a Maximum Allowed Usage during the length of the curtailment. C. Efforts by SoCalGas to Minimize or Alleviate the Curtailment SoCalGas notified the affected customers of the curtailment of service through their Account Manager and via our Envoy electronic bulletin board. Notices were posted on Envoy on August 3, 2017 and August 7, 2017.2 Confidentiality Due to the confidential nature of the information in Attachment A, a declaration requesting confidential treatment is included. The List of the Affected Customers in Attachment A is only being provided to Energy Division under the confidentiality provisions of General Order (GO) 66-C, Section 583 of the Public Utilities Code, and D.16-08-024. Protest Anyone may protest this Advice Letter to the Commission. The protest must state the grounds upon which it is based, including such items as financial and service impact, and should be submitted expeditiously. The protest must be made in writing and received within 20 days of the date of this Advice Letter, which is August 30, 2017. There is no restriction on who may file a protest. The address for mailing or delivering a protest to the 2 derId%3D1%26rand%3D36
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Advice No. 5176 -3- August 10, 2017 Commission is: CPUC Energy Division Attention: Tariff Unit 505 Van Ness Avenue San Francisco, CA 94102 Copies of the protest should also be sent via e-mail to the attention of the Energy Division Tariff Unit ( A copy of the protest shall also be sent via both e-mail and facsimile to the address shown below on the same date it is mailed or delivered to the Commission. Attn: Ray B. Ortiz Tariff Manager - GT14D6 555 West Fifth Street Los Angeles, CA 90013-1011 Facsimile No.: (213) 244-4957 E-Mail: Effective Date SoCalGas believes this Advice Letter is subject to Energy Division disposition and should be classified as Tier 1 (effective pending disposition) pursuant to GO 96-B. It is in compliance with D.16-07-008. Therefore, SoCalGas respectfully requests that it be made effective on August 10, 2017, which is the date filed. Notice A copy of this Advice Letter is being sent to SoCalGas’ GO 96-B service list and the Commission’s service lists for A.14-12-017, A.15-07-014, and A.15-06-020. Address change requests to the GO 96-B should be directed by electronic mail to or call 213-244-2837. For changes to all other service lists, please contact the Commission’s Process Office at 415-703-2021 or by electronic mail at _________________________________ Ronald van der Leeden Director – Regulatory Affairs Attachments
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CALIFORNIA PUBLIC UTILITIES COMMISSION ADVICE LETTER FILING SUMMARY ENERGY UTILITY MUST BE COMPLETED BY UTILITY (Attach additional pages as needed) Company name/CPUC Utility No. SOUTHERN CALIFORNIA GAS COMPANY (U 9O4G) Utility type: Contact Person: Ray B. Ortiz ELC GAS Phone #: (213) 244-3837 PLC HEAT WATER E-mail: EXPLANATION OF UTILITY TYPE ELC = Electric PLC = Pipeline GAS = Gas HEAT = Heat (Date Filed/ Received Stamp by CPUC) WATER = Water Advice Letter (AL) #: 5176 Subject of AL: Emergency Local Service Zone Curtailment Effective August 3, 2017 Keywords (choose from CPUC listing): Curtailment AL filing type: Monthly Quarterly Annual One-Time Other If AL filed in compliance with a Commission order, indicate relevant Decision/Resolution #: D.16-07-008 Does AL replace a withdrawn or rejected AL? If so, identify the prior AL: No Summarize differences between the AL and the prior withdrawn or rejected AL1: N/A Does AL request confidential treatment? If so, provide explanation: See Declaration of Confidentiality. Resolution Required? Yes No Requested effective date: 8/10/17 Tier Designation: 1 No. of tariff sheets: 2 3 0 Estimated system annual revenue effect: (%): N/A Estimated system average rate effect (%): N/A When rates are affected by AL, include attachment in AL showing average rate effects on customer classes (residential, small commercial, large C/I, agricultural, lighting). Tariff schedules affected: N/A Service affected and changes proposed1: N/A Pending advice letters that revise the same tariff sheets: None Protests and all other correspondence regarding this AL are due no later than 20 days after the date of this filing, unless otherwise authorized by the Commission, and shall be sent to: CPUC, Energy Division Southern California Gas Company Attention: Tariff Unit Attention: Ray B. Ortiz 505 Van Ness Ave., 555 West 5th Street, GT14D6 San Francisco, CA 94102 Los Angeles, CA 90013-1011 1 Discuss in AL if more space is needed.
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ATTACHMENT A Advice No. 5176 List of Affected Customers Confidential and Protected Materials Pursuant to Public Utilities Code Section 583, General Order 66-C, and D.16-08-024
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et seq
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BEFORE THE PUBLIC UTILITIES COMMISSION OF THE STATE OF CALIFORNIA 4. have been delegated authority to sign this declaration by Lisa M. Alexander, Vice President, Customer Solutions and Communications. I declare under penalty under the laws ofthe State ofcalifomia that the foregoing is true and correct to the best of my knowledge. Executed this 10"‘ day ol‘August, ZOI7, at Los Angeles, California. 1/? Ra Prince Director, Sen/ices
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