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{"sheet":"INFORMATION","index":0,"n_rows":4,"n_cols":1,"rows_kept":4,"cut":false,"hidden":false,"merged":[]}
["This 2022 Annual Report workbook provides a summary of the natural gas underground storage (NGUS) quarterly and annual data that is submitted to the California Air Resources Board (CARB) in accordance with the reporting requirements in the Greenhouse Gas Emission Standards for Crude Oil and Natural Gas Facilities (or Oil and Gas Methane Regulation). \n\nThere are twelve (12) NGUS facilities, and a separate tab is provided for each one. (Operators are also grouped by color-coding). \n\nOn each facility tab, there are three (3) tables:\n"]
["1. Ambient Methane Monitor\n\nThe Oil and Gas Methane Regulation requires operators of NGUS facilities to submit ambient methane data gathered by the continuous monitors annually. Data is submitted to CARB on July 1 of the calendar year after the calendar year in which the data were collected (i.e., 2022 data was submitted to CARB on July 1, 2023). \n\nThis table provides information (including ambient methane concentration baselines; alarm thresholds; data capture rates; minimum, maximum, and mean concentrations; and alarm counts) for the monitors installed at the facility. Note: a minimum of two (2) monitors are required for the monitoring plan, including one (1) upwind and one (1) downwind. Site conditions (e.g., geography, topography, etc.) were taken into consideration for the number and placement of monitors, and in some cases, operators installed more than two (2) monitors at the facility. Also, monitor placements were based on the predominant wind direction, as supported by annual wind rose data. Seasonal fluctuations in wind direction can alter the \"upwind\" or \"downwind\" designation of ambient methane monitors. \n"]
["2. Details for Continuous Ambient Methane Monitoring Alarms\n\nThis table further expands the \"Alarm Counts\" reported in the Ambient Methane Monitors table above. It identifies the monitor that triggered the alarm; and the date, time and duration of the alarm. \n\nWhen an alarm is triggered, the operator conducts a follow-up investigation to confirm the alarm, and then notifies CARB, CalGEM, and the appropriate air district within 24 hours, via email notification. In the event that a leak is identified during the investigation, the leak shall be tested in accordance with US EPA Reference Method 21, and then repaired within the repair timeframes specified for each leak threshold in the Oil and Gas Methane Regulation. \n\nThe \"Explanation\" column in this table provides a brief description of the results/findings of those follow-up investigations. \n"]
["3. Number of Leaks Reported for Daily Wellhead Screening\n\nOperators of NGUS facilities are required to conduct either daily (i.e., on-the-ground inspections) or continuous (i.e., installed sensors with alarms programmed to specific leak thresholds) wellhead screening at each injection/withdrawal wellhead assembly and attached pipelines. Leaks that were identified during wellhead screening and above the minimum allowable leak threshold must be reported to CARB quarterly. The number of leaks, sorted by leak thresholds and timing of discovery (by quarter), are summarized in this table. \n"]

{"sheet":"PG&E MDI","index":1,"n_rows":27,"n_cols":10,"rows_kept":27,"cut":false,"hidden":false,"merged":[[17,9,17,25],[18,9,18,25],[19,9,19,25],[20,9,20,25],[22,5,22,9],[0,0,0,13],[1,0,1,13],[2,0,3,0],[2,2,2,3],[5,9,5,25],[6,9,6,25],[2,5,3,25],[4,9,4,25],[7,9,7,25],[8,9,8,25],[9,9,9,25],[10,9,10,25],[11,9,11,25],[12,9,12,25],[12,0,16,3],[13,9,13,25],[14,9,14,25],[15,9,15,25],[16,9,16,25]]}
["Operator: PG&E   Facility: McDonald Island"]
["Continuous ambient methane monitoring implementation date1: 7/16/2021\nSummary for ambient methane monitors below includes data collected below from 1/1/2022 - 12/31/2022"]
["Ambient Methane Monitor2","Upwind","Downwind",null,null,"Details for Continuous Ambient Methane Monitoring Alarms"]
[null,"MDI-UW","MDI-DW1","MDI-DW2"]
["Baseline (ppm)",3.6,5.19,4.49,null,"Date / Time (PST)","Monitor","Methane (ppm)","Duration (hr)","Explanation"]
["Alarm Threshold3 (ppm)",14.4,20.76,17.96,null,"2/11/20222 3:00","MDI DW2",20.61,1,"No gas was released around the time of the alarm trigger event. Facility personnel completed an inspection and did not find any leaks. The reading may have come from natural sources other than PG&E assets, such as the shallow rice fields surrounding the DW2 sensor. The fields were flooded and farming activity was present near the site."]
["Data Capture Rate4",0.99970000000000003,0.99990000000000001,0.99929999999999997,null,"2022-02-11T20:00:00","MDI DW2",22.89,1,"No gas was released around the time of the alarm trigger event. Facility personnel inspected and identified nothing of note. The reading may have come from natural sources other than PG&E assets, such as the shallow rice fields surrounding DW2 sensor. The fields were flooded and farming activity was present near the site."]
["Minimum Value (ppm)",1.88,1.88,1.9,null,"2022-02-19T07:00:00","MDI DW2",21.58,1,"No gas was released around the time of the alarm trigger event. Facility personnel inspected and identified nothing of note. The reading may have come from natural sources other than PG&E assets, such as the shallow rice fields surrounding DW2 sensor. The fields were flooded and farming activity was present near the site."]
["Maximum Value (ppm)",10.34,61.96,22.89,null,"2022-02-21T03:00:00","MDI DW1",31.63,2,"No gas was released around the time of the alarm trigger event. Facility personnel inspected and identified nothing of note. The reading may have come from natural sources other than PG&E assets, such as the shallow rice fields surrounding DW1 sensor. The fields were flooded and farming activity was present near the site."]
["Mean Value (ppm)",2.23,2.68,2.48,null,"2022-02-21T19:00:00","MDI DW1",24.02,1,"No gas was released around the time of the alarm trigger event. Facility personnel inspected and identified nothing of note. The reading may have come from natural sources other than PG&E assets, such as the shallow rice fields surrounding DW1 sensor. The fields were flooded and farming activity was present near the site."]
[" Alarm Count",0,15,4,null,"2022-04-02T23:00:00","MDI DW1",22.26,1,"Facility personnel completed an inspection and nothing of note was identified. The reading may have come from natural sources other than PG&E assets, such as farmlands nearby where sitting water was present. "]
["Notes",null,null,null,null,"2022-04-03T01:00:00","MDI DW1",26.98,2,"Facility personnel completed an inspection and nothing of note was identified. The reading may have come from natural sources other than PG&E assets, such as farmlands nearby where sitting water was present. "]
["1 :  The effective date when the continuous ambient methane monitoring system was fully operational with alarm mechanisms programmed.\n2 :  The placement of ambient methane monitors were based on the predominant wind direction, as supported by annual wind rose data. However seasonal fluctuations in wind direction can alter the \"upwind\" or \"downwind\" designation.\n3 :  An alarm threshold is an ambient methane concentration that is equal to or greater than four times the baseline concentration.\n4 :  Data capture rate represents the percentage of valid hourly data collected to that of the total amount of hourly data possible in a reporting period.",null,null,null,null,"2022-04-07T07:00:00","MDI DW2",18.72,1,"Facility personnel completed an inspection and nothing of note was identified. The reading may have come from natural sources other than PG&E assets, such as farmlands nearby where sitting water was present. "]
[null,null,null,null,null,"2022-04-12T07:00:00","MDI DW1",61.96,1,"Facility personnel completed an inspection and nothing of note was identified."]
[null,null,null,null,null,"2022-04-23T21:00:00","MDI DW1",32.549999999999997,1,"Facility personnel completed an inspection and nothing of note was identified."]
[null,null,null,null,null,"2022-04-23T23:00:00","MDI DW1",24.62,1,"Facility personnel completed an inspection and nothing of note was identified."]
[null,null,null,null,null,"2022-04-24T01:00:00","MDI DW1",22.6,1,"Facility personnel completed an inspection and nothing of note was identified."]
[null,null,null,null,null,"2022-05-06T01:00:00","MDI DW1",22.5,2,"Facility personnel completed an inspection and nothing of note was identified."]
[null,null,null,null,null,"2022-05-09T03:00:00","MDI DW1",23.04,1,"Facility personnel completed an inspection and nothing of note was identified."]
[null,null,null,null,null,"2022-05-15T01:00:00","MDI DW1",23.93,1,"Facility personnel completed an inspection and nothing of note was identified."]
[null,null,null,null,null,"2022-11-03T13:00:00","MDI DW1",21.54,1,"Facility personnel completed an inspection and nothing of note was identified."]
[]
[null,null,null,null,null,"Number of Leaks Reported from Daily Wellhead Screening"]
[null,null,null,null,null,null,"Q1","Q2","Q3","Q4"]
[null,null,null,null,null,"≥ 50,000 ppm ",0,4,1,1]
[null,null,null,null,null,"10,000 - 49,999 ppm ",0,2,1,0]
[null,null,null,null,null,"1,000 - 9,999 ppm ",0,0,0,0]

{"sheet":"PG&E LM","index":2,"n_rows":14,"n_cols":9,"rows_kept":14,"cut":false,"hidden":false,"merged":[[13,4,16,12],[6,8,6,12],[0,0,0,12],[1,0,1,12],[2,0,3,0],[2,4,3,12],[4,8,4,12],[5,8,5,12],[7,4,7,8]]}
["Operator: PG&E   Facility: Los Medanos"]
["Continuous ambient methane monitoring implementation date1: 12/2/2021 (LM-DW), 12/3/2021 (LM-UW)\nSummary for ambient methane monitors below includes data collected from 1/1/2022 - 12/31/2022"]
["Ambient Methane Monitor2","Upwind","Downwind",null,"Details for Continuous Ambient Methane Monitoring Alarms"]
[null,"LM-UW","LM-DW"]
["Baseline (ppm)",2.5,4.41,null,"Date / Time (PST)","Monitor","Methane (ppm)","Duration (hr)","Explanation"]
["Alarm Threshold3 (ppm)",10,17.64,null,"NA","NA","NA","NA","* No alarms occurred in this reporting period. "]
["Data Capture Rate4",0.999,0.99980000000000002]
["Minimum Value (ppm)",1.9,1.87,null,"Number of Leaks Reported from Daily Wellhead Screening"]
["Maximum Value (ppm)",4.24,14.3,null,null,"Q1","Q2","Q3","Q4"]
["Mean Value (ppm)",2.1800000000000002,2.4900000000000002,null,"≥ 50,000 ppm ",0,1,1,1]
[" Alarm Count",0,0,null,"10,000 - 49,999 ppm ",0,1,0,0]
[null,null,null,null,"1,000 - 9,999 ppm ",0,0,0,1]
[null,null,null,null,"Notes"]
[null,null,null,null,"1 :  The effective date when the continuous ambient methane monitoring system was fully operational with alarm mechanisms programmed.\n2 :  The placement of ambient methane monitors were based on the predominant wind direction, as supported by annual wind rose data. However seasonal fluctuations in wind direction can alter the \"upwind\" or \"downwind\" designation.\n3 :  An alarm threshold is an ambient methane concentration that is equal to or greater than four times the baseline concentration.\n4 :  Data capture rate represents the percentage of valid hourly data collected to that of the total amount of hourly data possible in a reporting period."]

{"sheet":"PG&E PC","index":3,"n_rows":14,"n_cols":9,"rows_kept":14,"cut":false,"hidden":false,"merged":[[13,4,15,12],[7,4,7,8],[0,0,0,12],[1,0,1,12],[2,0,3,0],[2,4,3,12],[4,8,4,12],[5,8,5,12]]}
["Operator: PG&E   Facility: Pleasant Creek"]
["Continuous ambient methane monitoring implementation date1: 7/16/2021\nSummary for ambient methane monitors below includes data collected from 1/1/2022 - 12/31/2022"]
["Ambient Methane Monitor2","Upwind","Downwind",null,"Details for Continuous Ambient Methane Monitoring Alarms"]
[null,"PC-UW","PC-DW"]
["Baseline (ppm)",2.4300000000000002,2.4,null,"Date / Time (PST)","Monitor","Methane (ppm)","Duration (hr)","Explanation"]
["Alarm Threshold3 (ppm)",9.7200000000000006,9.6,null,"NA","NA","NA","NA","* No alarms occurred in this reporting period. "]
["Data Capture Rate4",0.99990000000000001,0.99980000000000002]
["Minimum Value (ppm)",1.88,1.61,null,"Number of Leaks Reported from Daily Wellhead Screening"]
["Maximum Value (ppm)",3.64,3.65,null,null,"Q1","Q2","Q3","Q4"]
["Mean Value (ppm)",2.0099999999999998,1.96,null,"≥ 50,000 ppm",0,0,0,2]
[" Alarm Count",0,0,null,"10,000 - 49,999 ppm   ",0,0,0,3]
[null,null,null,null," 1,000 - 9,999 ppm ",0,0,0,2]
[null,null,null,null,"Notes"]
[null,null,null,null,"1 :  The effective date when the continuous ambient methane monitoring system was fully operational with alarm mechanisms programmed.\n2 :  The placement of ambient methane monitors were based on the predominant wind direction, as supported by annual wind rose data. However seasonal fluctuations in wind direction can alter the \"upwind\" or \"downwind\" designation.\n3 :  An alarm threshold is an ambient methane concentration that is equal to or greater than four times the baseline concentration.\n4 :  Data capture rate represents the percentage of valid hourly data collected to that of the total amount of hourly data possible in a reporting period."]

{"sheet":"SCG AC","index":4,"n_rows":14,"n_cols":12,"rows_kept":14,"cut":false,"hidden":false,"merged":[[13,7,16,15],[4,11,4,15],[5,11,5,15],[7,7,7,11],[0,0,0,15],[1,0,1,15],[2,0,3,0],[2,1,2,2],[2,3,2,5],[2,7,3,15]]}
["Operator: SoCalGas   Facility: Aliso Canyon"]
["Continuous ambient methane monitoring implementation date1: 3/31/2021\nSummary for ambient methane monitors below includes data collected from 1/1/2022 - 12/31/2022"]
["Ambient Methane Monitor2","Upwind",null,"Downwind",null,null,null,"Details for Continuous Ambient Methane Monitoring Alarms"]
[null,"MM2","MM3","MM1","MM4 ","MM5 "]
["Baseline (ppm)",2.04,2.0699999999999998,2.15,2.2200000000000002,2.25,null,"Date / Time (PST / PDT)","Monitor","Methane (ppm)","Duration (hr)","Explanation"]
["Alarm Threshold3 (ppm)",8.16,8.2799999999999994,8.6,8.8800000000000008,9,null,"NA","NA","NA","NA","* No alarms occurred in this reporting period. "]
["Data Capture Rate4",0.99839999999999995,0.98919999999999997,0.999,0.99839999999999995,0.99890000000000001]
["Minimum Value (ppm)",1.81,1.89,1.83,1.81,1.83,null,"Number of Leaks Reported from Daily or Continuous Wellhead Screening5"]
["Maximum Value (ppm)",3.53,3.24,3.06,3.51,3.1,null,null,"Q1","Q2","Q3","Q4"]
["Mean Value (ppm)",1.96,2.0299999999999998,2.0499999999999998,1.98,2.0499999999999998,null,"≥ 50,000 ppm ",0,0,0,0]
["Alarm Count",0,0,0,0,0,null,"10,000 - 49,999 ppm ",0,0,0,0]
[null,null,null,null,null,null,null,"1,000 - 9,999 ppm ",0,0,0,0]
[null,null,null,null,null,null,null,"Notes"]
[null,null,null,null,null,null,null,"1 :  The effective date when the continuous ambient methane monitoring system was fully operational with alarm mechanisms programmed.\n2 :  The placement of ambient methane monitors were based on the predominant wind direction, as supported by annual wind rose data. However seasonal fluctuations in wind direction can alter the \"upwind\" or \"downwind\" designation.\n3 :  An alarm threshold is an ambient methane concentration that is equal to or greater than four times the baseline concentration.\n4 :  Data capture rate represents the percentage of valid hourly data collected to that of the total amount of hourly data possible in a reporting period.\n5 :  The use of continuous monitors (i.e., LEL sensors) is the primary method for wellhead screening at this SoCalGas facility. During equipment installation, breakdown or repair, SoCalGas will conduct daily wellhead screening as an alternative method.\n"]

{"sheet":"SCG HR","index":5,"n_rows":15,"n_cols":10,"rows_kept":15,"cut":false,"hidden":false,"merged":[[6,9,6,23],[7,9,7,23],[8,9,8,23],[10,5,10,9],[12,0,17,3],[5,9,5,23],[2,5,3,23],[0,0,0,13],[1,0,1,13],[2,0,3,0],[2,2,2,3],[4,9,4,23]]}
["Operator: SoCalGas   Facility: Honor Rancho"]
["Continuous ambient methane monitoring implementation date1: 3/31/2021\nSummary for ambient methane monitors below includes data collected from 1/1/2022 - 12/31/2022"]
["Ambient Methane Monitor2","Upwind","Downwind",null,null,"Details for Continuous Ambient Methane Monitoring Alarms"]
[null,"MM2 ","MM1","MM3"]
["Baseline (ppm)",2.37,3.58,3.14,null,"Date / Time (PST/ PDT)","Monitor","Methane (ppm)","Duration (hr)","Explanation"]
["Alarm Threshold3 (ppm)",9.48,14.32,12.56,null,"2022-05-23T14:00:00","MM2",23.25,1,"Triggered by operations' activity."]
["Data Capture Rate4",0.95809999999999995,0.99909999999999999,0.99529999999999996,null,"2022-09-02T06:00:00","MM3",17.7,1,"No localized source of methane was discovered after an alarm investigation was conducted at the facility. The alarm was likely caused by a source outside facility boundaries which has not been determined."]
["Minimum Value (ppm)",1.78,2.09,1.83,null,"2022-10-19T08:00:00","MM2",10.17,1,"Triggered by operations' activity."]
["Maximum Value (ppm)",23.25,6.83,17.7,null,"2022-10-20T08:00:00","MM2",10.79,1,"Triggered by operations' activity."]
["Mean Value (ppm)",2.09,2.3199999999999998,2.0499999999999998]
[" Alarm Count",3,0,1,null,"Number of Leaks Reported from Daily or Continuous Wellhead      Screening5"]
["Notes",null,null,null,null,null,"Q1","Q2","Q3","Q4"]
["1 :  The effective date when the continuous ambient methane monitoring system was fully operational with alarm mechanisms programmed.\n2 :  The placement of ambient methane monitors were based on the predominant wind direction, as supported by annual wind rose data. However seasonal fluctuations in wind direction can alter the \"upwind\" or \"downwind\" designation.\n3 :  An alarm threshold is an ambient methane concentration that is equal to or greater than four times the baseline concentration.\n4 :  Data capture rate represents the percentage of valid hourly data collected to that of the total amount of hourly data possible in a reporting period.\n5 :  The use of continuous monitors (i.e., LEL sensors) is the primary method for wellhead screening at this SoCalGas facility. During equipment installation, breakdown or repair, SoCalGas will conduct daily wellhead screening as an alternative method.",null,null,null,null,"≥ 50,000 ppm ",0,0,0,0]
[null,null,null,null,null,"10,000 - 49,999 ppm ",0,0,0,0]
[null,null,null,null,null,"1,000 - 9,999 ppm ",0,0,0,0]

{"sheet":"SCG PDR","index":6,"n_rows":14,"n_cols":9,"rows_kept":14,"cut":false,"hidden":false,"merged":[[5,8,5,12],[7,4,7,8],[13,4,16,12],[0,0,0,12],[1,0,1,12],[2,0,3,0],[2,1,2,2],[2,4,3,12],[4,8,4,12]]}
["Operator: SoCalGas   Facility: Playa Del Rey"]
["Continuous ambient methane monitoring implementation date1: 3/31/2021\nSummary for ambient methane monitors below includes data collected from 1/1/2022 - 12/31/2022"]
["Ambient Methane Monitor2","Upwind & Downwind",null,null,"Details for Continuous Ambient Methane Monitoring Alarms"]
[null,"MM1","MM2 "]
["Baseline (ppm)",2.82,2.74,null,"Date / Time (PST / PDT)","Monitor","Methane (ppm)","Duration (hr)","Explanation"]
["Alarm Threshold3 (ppm)",11.28,10.96,null,"NA","NA","NA","NA","* No alarms occurred in this reporting period. "]
["Data Capture Rate4",0.99219999999999997,0.93240000000000001]
["Minimum Value (ppm)",1.86,1.85,null,"Number of Leaks Reported from Daily or Continuous Wellhead      Screening5"]
["Maximum Value (ppm)",6.38,7.6,null,null,"Q1","Q2","Q3","Q4"]
["Mean Value (ppm)",2.23,2.11,null,"≥ 50,000 ppm ",0,0,0,0]
[" Alarm Count",0,0,null,"10,000 - 49,999 ppm ",0,0,0,0]
[null,null,null,null,"1,000 - 9,999 ppm ",0,0,0,0]
[null,null,null,null,"Notes"]
[null,null,null,null,"1 :  The effective date when the continuous ambient methane monitoring system was fully operational with alarm mechanisms programmed.\n2 :  The placement of ambient methane monitors were based on the predominant wind direction, as supported by annual wind rose data. However seasonal fluctuations in wind direction can alter the \"upwind\" or \"downwind\" designation.\n3 :  An alarm threshold is an ambient methane concentration that is equal to or greater than four times the baseline concentration.\n4 :  Data capture rate represents the percentage of valid hourly data collected to that of the total amount of hourly data possible in a reporting period.\n5 :  The use of continuous monitors (i.e., LEL sensors) is the primary method for wellhead screening at this SoCalGas facility. During equipment installation, breakdown or repair, SoCalGas will conduct daily wellhead screening as an alternative method.\n\n"]

{"sheet":"SCG LG","index":7,"n_rows":14,"n_cols":9,"rows_kept":14,"cut":false,"hidden":false,"merged":[[7,4,7,8],[13,4,17,12],[5,8,5,12],[6,8,6,12],[0,0,0,12],[1,0,1,12],[2,0,3,0],[2,1,2,2],[2,4,3,12],[4,8,4,12]]}
["Operator: SoCalGas   Facility: La Goleta"]
["Continuous ambient methane monitoring implementation date1: 3/31/2021\nSummary for ambient methane monitors below includes data collected from 1/1/2022 - 12/31/2022"]
["Ambient Methane Monitor2","Upwind & Downwind",null,null,"Details for Continuous Ambient Methane Monitoring Alarms"]
[null,"MM1","MM2 "]
["Baseline (ppm)",2.31,2.56,null,"Date / Time (PST / PDT)","Monitor","Methane (ppm)","Duration (hr)","Explanation"]
["Alarm Threshold3 (ppm)",9.24,10.24,null,"NA","NA","NA","NA","* No alarms occurred in this reporting period. "]
["Data Capture Rate4",0.99870000000000003,0.99850000000000005]
["Minimum Value (ppm)",1.92,1.9,null,"Number of Leaks Reported from Daily or Continuous Wellhead      Screening5"]
["Maximum Value (ppm)",8.67,5.89,null,null,"Q1","Q2","Q3","Q4"]
["Mean Value (ppm)",2.41,2.3199999999999998,null,"≥ 50,000 ppm ",0,0,0,0]
[" Alarm Count",0,0,null,"10,000 - 49,999 ppm ",0,0,0,0]
[null,null,null,null,"1,000 - 9,999 ppm ",0,0,0,0]
[null,null,null,null,"Notes"]
[null,null,null,null,"1 :  The effective date when the continuous ambient methane monitoring system was fully operational with alarm mechanisms programmed.\n2  :  The placement of ambient methane monitors were based on the predominant wind direction, as supported by annual wind rose data. However seasonal fluctuations in wind direction can alter the \"upwind\" or \"downwind\" designation.\n3 :  An alarm threshold is an ambient methane concentration that is equal to or greater than four times the baseline concentration.\n4 :  Data capture rate represents the percentage of valid hourly data collected to that of the total amount of hourly data possible in a reporting period.\n5 :  The use of continuous monitors (i.e., LEL sensors) is the primary method for wellhead screening at this SoCalGas facility. During equipment installation, breakdown or repair, SoCalGas will conduct daily wellhead screening as an alternative method."]

{"sheet":"LGS LG","index":8,"n_rows":31,"n_cols":10,"rows_kept":31,"cut":false,"hidden":false,"merged":[[12,0,20,3],[26,5,26,9],[0,0,0,13],[1,0,1,13],[2,0,3,0],[2,2,2,3],[17,9,17,15],[18,9,18,15],[10,9,10,15],[11,9,11,15],[12,9,12,15],[13,9,13,15],[24,9,24,15],[23,9,23,15],[4,9,4,15],[2,5,3,15],[5,9,5,15],[6,9,6,15],[7,9,7,15],[8,9,8,15],[9,9,9,15],[19,9,19,15],[20,9,20,15],[21,9,21,15],[22,9,22,15],[14,9,14,15],[15,9,15,15],[16,9,16,15]]}
["Operator: Lodi Gas Storage   Facility: Lodi Gas"]
["Continuous ambient methane monitoring implementation date1: 3/2/2021\nSummary for ambient methane monitors below includes data collected from 1/1/2022 - 12/31/2022"]
["Ambient Methane Monitor2","Upwind","Downwind",null,null,"Details for Continuous Ambient Methane Monitoring Alarms"]
[null,"WS2","WS4","WS63"]
["Baseline (ppm)",3.32,4.1500000000000004,2.79,null,"Date / Time (PST)","Monitor","Methane (ppm)","Duration (hr)","Explanation"]
["Alarm Threshold4 (ppm)",13.28,16.600000000000001,11.16,null,"2022-01-29T02:00:00","WS2",15.32,1,"Facility investigation was unable to determine the source of the alarm exceedance."]
["Data Capture Rate5",1,0.99909999999999999,0.9929,null,"2022-02-12T22:00:00","WS2",23.01,1,"Facility investigation was unable to determine the source of the alarm exceedance."]
["Minimum Value (ppm)",1.82,1.85,0.01,null,"2022-03-18T21:00:00","WS2",17.16,1,"Facility investigation was unable to determine the source of the alarm exceedance."]
["Maximum Value (ppm)",70.75,38.659999999999997,5.53,null,"2022-06-05T10:00:00","WS2",16.3,1,"Elevated methane readings due to maintenance activities."]
["Mean Value (ppm)",2.5499999999999998,2.38,1.06,null,"2022-06-07T08:00:00","WS2",24.43,1,"Elevated methane readings due to maintenance activities."]
[" Alarm Count",24,1,0,null,"2022-06-07T23:00:00","WS2",14.77,1,"Elevated methane readings due to maintenance activities."]
["Notes",null,null,null,null,"2022-06-08T02:00:00","WS2",17.190000000000001,1,"Elevated methane readings due to maintenance activities."]
["1 : The effective date when the continuous ambient methane monitoring system was fully operational with alarm mechanisms programmed.\n2 :  The placement of ambient methane monitors were based on the predominant wind direction, as supported by annual wind rose data. However seasonal fluctuations in wind direction can alter the \"upwind\" or \"downwind\" designation. \n3 :  On November 18, 2022, LGS recalculated an interim baseline concentration (2.79 ppm) for WS6 monitor and programmed 11.16 ppm as the alarm threshold. Once the target for data capture rate (≥75% on a 12-month continuous basis) is achieved, the baseline concentration for WS6 monitor will be recalculated and then programmed in the monitoring system. Note: no alarms occurred during this reporting period regardless of whether an interim or recalculated interim baseline concentration was programmed for alarming purposes.\n4 :  An alarm threshold is an ambient methane concentration that is equal to or greater than four times the baseline concentration.\n5 :  Data capture rate represents the percentage of valid hourly data collected to that of the total amount of hourly data possible in a reporting period.\n",null,null,null,null,"2022-06-09T04:00:00","WS2",44.12,1,"Elevated methane readings due to maintenance activities."]
[null,null,null,null,null,"2022-06-09T07:00:00","WS2",70.75,2,"Elevated methane readings due to maintenance activities."]
[null,null,null,null,null,"2022-06-09T23:00:00","WS2",16.52,1,"Elevated methane readings due to maintenance activities."]
[null,null,null,null,null,"2022-06-10","WS2",18.063997395833333,1,"Elevated methane readings due to maintenance activities."]
[null,null,null,null,null,"2022-06-10T03:00:00","WS2",26.214724392361113,1,"Elevated methane readings due to maintenance activities."]
[null,null,null,null,null,"2022-06-10T05:00:00","WS2",33.71,2,"Elevated methane readings due to maintenance activities."]
[null,null,null,null,null,"2022-06-11","WS2",24.2,2,"Elevated methane readings due to maintenance activities."]
[null,null,null,null,null,"2022-06-12T03:00:00","WS2",18.21,1,"Elevated methane readings due to maintenance activities."]
[null,null,null,null,null,"2022-08-15T08:00:00","WS2",15.7,2,"Elevated methane readings due to MIT well logging survey operations."]
[null,null,null,null,null,"2022-08-20T04:00:00","WS2",13.58,1,"Elevated methane readings due to MIT well logging survey operations."]
[null,null,null,null,null,"2022-09-09T07:00:00","WS2",14.63,2,"Elevated methane readings due to MTD well logging survey operations."]
[null,null,null,null,null,"2022-11-07T08:00:00","WS2",19.309999999999999,1,"Elevated methane readings due to maintenance activities."]
[null,null,null,null,null,"2022-09-07T09:00:00","WS4",38.659999999999997,1,"Elevated methane readings due to MTD well logging survey operations."]
[]
[null,null,null,null,null,"Number of Leaks Reported from Daily Wellhead Screening"]
[null,null,null,null,null,null,"Q1","Q2","Q3","Q4"]
[null,null,null,null,null,"≥ 50,000 ppm ",0,0,0,0]
[null,null,null,null,null,"10,000 - 49,999 ppm ",0,0,0,0]
[null,null,null,null,null," 1,000 - 9,999 ppm ",0,0,0,0]

{"sheet":"LGS KH","index":9,"n_rows":29,"n_cols":11,"rows_kept":29,"cut":false,"hidden":false,"merged":[[6,10,6,17],[7,10,7,17],[8,10,8,17],[2,6,3,17],[19,10,19,17],[4,10,4,17],[0,0,0,14],[1,0,1,14],[2,0,3,0],[2,2,2,4],[5,10,5,17],[12,0,24,4],[9,10,9,17],[10,10,10,17],[11,10,11,17],[12,10,12,17],[13,10,13,17],[14,10,14,17],[15,10,15,17],[16,10,16,17],[17,10,17,17],[18,10,18,17],[24,6,24,10],[20,10,20,17],[21,10,21,17],[22,10,22,17]]}
["Operator: Lodi Gas Storage   Facility: Kirby Hills"]
["Continuous ambient methane monitoring implementation date1: 3/2/2021\nSummary for ambient methane monitors below includes data collected from 1/1/2022 - 12/31/2022"]
["Ambient Methane Monitor2","Upwind","Downwind",null,null,null,"Details for Continuous Ambient Methane Monitoring Alarms"]
[null,"Site 103","WS21","WS22","WS234"]
["Baseline (ppm)",2.68,2.46,2.67,3.01,null,"Date / Time (PST)","Monitor","Methane (ppm)","Duration (hr)","Explanation"]
["Alarm Threshold5 (ppm)",10.72,9.84,10.68,12.04,null,"2022-01-25T07:00:00","WS21",10.94,1,"Facility investigation was unable to determine the source of the alarm exceedance."]
["Data Capture Rate6",0.99039999999999995,0.96579999999999999,0.2974,0.55900000000000005,null,"2022-04-29T11:00:00","WS21",15.6,8,"Elevated methane readings due to well maintenance activities."]
["Minimum Value (ppm)",1.84,0.76,1.67,0,null,"2022-06-08T10:00:00","WS21",38.020000000000003,1,"Elevated methane readings due to maintenance activities."]
["Maximum Value7 (ppm)",3.86,20411.060000000001,7.33,11.78,null,"2022-06-13T14:00:00","WS21",3985.19,2,"Facility investigation was unable to determine the source of the alarm exceedance."]
["Mean Value (ppm)",2.12,7.04,1.93,2.0299999999999998,null,"2022-06-26T01:00:00","WS21",10.97,1,"Facility investigation was unable to determine the source of the alarm exceedance."]
[" Alarm Count",0,34,0,0,null,"2022-08-10T07:00:00","WS21",18.440000000000001,2,"Elevated methane readings due to MIT well logging survey operations."]
["Notes",null,null,null,null,null,"2022-08-10T13:00:00","WS21",14.04,3,"Elevated methane readings due to MIT well logging survey operations."]
["1 :  The effective date when the continuous ambient methane monitoring system was fully operational with alarm mechanisms programmed.\n2 :  The placement of ambient methane monitors were based on the predominant wind direction, as supported by annual wind rose data. However seasonal fluctuations in wind direction can alter the \"upwind\" or \"downwind\" designation.\n3 :  On November 18, 2022, LGS recalculated an interim baseline concentration of 2.68 ppm for Site 10 monitor and programmed 10.72 ppm as the alarm threshold. Once the target for data capture rate (≥75% on a 12-month continuous basis) is achieved, the baseline concentration for Site 10 monitor will be recalculated and then programmed in the monitoring system. Note: no alarms were triggered during this reporting period, regardless of whether an interim or recalculated interim baseline concentration was used for alarm programming.\n4 :  In the previous reporting period, LGS applied an interim baseline concentration of 2.54 ppm for the WS23 monitor until a target for data capture rate (≥75% on a 12-month continuous basis) is achieved. On November 18, 2022, LGS recalculated the baseline concentration for the WS23 monitor to 3.01 ppm after the target was met and subsequently set the alarm threshold to 12.04 ppm. Note: no alarms were triggered during this reporting period, regardless of whether the interim or recalculated baseline concentration was used for alarm programming.\n5 :  An alarm threshold is an ambient methane concentration that is equal to or greater than four times the baseline concentration.\n6 :  Data capture rate represents the percentage of valid hourly data collected to that of the total amount of hourly data possible in a reporting period. The WS22 monitor experienced intermittent power failures and other issues resulting in irregular and incomplete data capture. The monitor was sent to the manufacturer for repairs to resolve the issues.\n7 :  The maximum ambient methane concentration for the WS21 monitor, 20,411.06 ppm, had occurred during the second hour of the alarm triggered on 6/13/2022 at 14:00, as shown in the \"Details for Continuous Ambient Methane Monitoring Alarms\" table.",null,null,null,null,null,"2022-09-05T16:00:00","WS21",20.62,1,"Facility investigation was unable to determine the source of the alarm exceedance."]
[null,null,null,null,null,null,"2022-09-05T19:00:00","WS21",12.32,1,"Facility investigation was unable to determine the source of the alarm exceedance."]
[null,null,null,null,null,null,"2022-09-06T10:00:00","WS21",14.53,1,"Facility investigation was unable to determine the source of the alarm exceedance."]
[null,null,null,null,null,null,"2022-09-08T14:00:00","WS21",39.659999999999997,1,"Facility investigation was unable to determine the source of the alarm exceedance."]
[null,null,null,null,null,null,"2022-09-08T17:00:00","WS21",10.88,2,"Facility investigation was unable to determine the source of the alarm exceedance."]
[null,null,null,null,null,null,"2022-09-14T09:00:00","WS21",70.66,5,"Elevated methane readings due to MTD well logging survey operations."]
[null,null,null,null,null,null,"2022-09-14T21:00:00","WS21",2276.0500000000002,1,"Elevated methane readings due to MTD well logging survey operations."]
[null,null,null,null,null,null,"2022-09-24T22:00:00","WS21",13.09,1,"Facility investigation was unable to determine the source of the alarm exceedance."]
[null,null,null,null,null,null,"2022-10-08T03:00:00","WS21",4578,1,"Facility investigation was unable to determine the source of the alarm exceedance."]
[null,null,null,null,null,null,"2022-10-20T01:00:00","WS21",9819.94,1,"Facility investigation was unable to determine the source of the alarm exceedance."]
[null,null,null,null,null,null,"2022-12-05T04:00:00","WS21",11.16,1,"Facility investigation was unable to determine the source of the alarm exceedance."]
[]
[null,null,null,null,null,null,"Number of Leaks Reported from Daily Wellhead Screening"]
[null,null,null,null,null,null,null,"Q1","Q2","Q3","Q4"]
[null,null,null,null,null,null,"≥ 50,000 ppm ",0,0,0,0]
[null,null,null,null,null,null,"10,000 - 49,999 ppm ",0,0,0,0]
[null,null,null,null,null,null," 1,000 - 9,999 ppm ",0,0,0,0]

{"sheet":"RGS WG","index":10,"n_rows":14,"n_cols":9,"rows_kept":14,"cut":false,"hidden":false,"merged":[[13,4,18,12],[7,4,7,8],[0,0,0,12],[1,0,1,12],[2,0,3,0],[2,4,3,12],[4,8,4,12],[5,8,5,12]]}
["Operator: Rockpoint Gas Storage   Facility: Wild Goose"]
["Continuous ambient methane monitoring implementation date1: 3/2/2021\nSummary for ambient methane monitors below includes data collected from 1/1/2022 - 12/31/2022"]
["Ambient Methane Monitor2","Upwind","Downwind",null,"Details for Continuous Ambient Methane Monitoring Alarms"]
[null,"East","West3"]
["Baseline (ppm)",13.3,13.49,null,"Date / Time (PST)","Monitor","Methane (ppm)","Duration (hr)","Explanation"]
["Alarm Threshold4 (ppm)",53.2,53.96,null,"NA","NA","NA","NA","* No alarms occurred in this reporting period. "]
["Data Capture Rate5",0.97799999999999998,0.95150000000000001]
["Minimum Value (ppm)",1.05,1.74,null,"Number of Leaks Reported from Daily Wellhead Screening"]
["Maximum Value (ppm)",48.5,45.43,null,null,"Q1","Q2","Q3","Q4"]
["Mean Value (ppm)",1.93,3.83,null,"≥ 50,000 ppm ",0,0,0,0]
[" Alarm Count",0,0,null,"10,000 - 49,999 ppm ",0,0,0,0]
[null,null,null,null,"1,000 - 9,999 ppm ",0,0,0,0]
[null,null,null,null,"Notes"]
[null,null,null,null,"1 :  The effective date when the continuous ambient methane monitoring system was fully operational with alarm mechanisms programmed.\n2 :  The placement of ambient methane monitors were based on the predominant wind direction, as supported by annual wind rose data. However seasonal fluctuations in wind direction can alter the \"upwind\" or \"downwind\" designation. \n3 : In the previous reporting period, RGS applied an interim baseline concentration of 29.37 ppm for the West monitor until a target for data capture rate (≥75% on a 12-month continuous basis) is achieved. On October 31, 2022, RGS recalculated the baseline concentration for the West monitor to 13.49 ppm after the target was met and subsequently set the alarm threshold to 53.96 ppm. Note: no alarms were triggered during this reporting period, regardless of whether the interim or recalculated baseline concentration was used for alarm programming.\n4 :  An alarm threshold is an ambient methane concentration that is equal to or greater than four times the baseline concentration.\n5 :  Data capture rate represents the percentage of valid hourly data collected to that of the total amount of hourly data possible in a reporting period."]

{"sheet":"GR","index":11,"n_rows":15,"n_cols":9,"rows_kept":15,"cut":false,"hidden":false,"merged":[[8,4,8,8],[14,4,17,12],[0,0,0,12],[1,0,1,12],[2,0,3,0],[6,8,6,15],[5,8,5,15],[4,8,4,15],[2,4,3,15]]}
["Operator: Gill Ranch Storage   Facility: Gill Ranch"]
["Continuous ambient methane monitoring implementation date1: 3/3/2021\nSummary for ambient methane monitors below includes data collected from 1/1/2022 - 12/31/2022"]
["Ambient Methane Monitor2","Upwind","Downwind",null,"Details for Continuous Ambient Methane Monitoring Alarms"]
[null,"West","East"]
["Baseline (ppm)",15.92,7.67,null,"Date / Time (PST)","Monitor","Methane (ppm)","Duration (hr)","Explanation"]
["Alarm Threshold3 (ppm)",63.68,30.68,null,"2022-03-21T11:00:00","East",33.979999999999997,1,"The alarm exceedance was caused by a well blowdown near the East monitor. This blowdown event was performed for maintenance purposes."]
["Data Capture Rate4",0.97399999999999998,0.96399999999999997,null,"2022-08-10T11:00:00","West",69.63,1,"The alarm exceedance was caused by a wireline logging inspection being performed on a well near the West monitor. This inspection was required for maintenance."]
["Minimum Value (ppm)",2.4500000000000002,0.85]
["Maximum Value (ppm)",69.63,33.979999999999997,null,"Number of Leaks Reported from Daily Wellhead Screening"]
["Mean Value (ppm)",5.76,3.78,null,null,"Q1","Q2","Q3","Q4"]
[" Alarm Count",1,1,null,"≥ 50,000 ppm ",0,0,0,0]
[null,null,null,null,"10,000 - 49,999 ppm ",0,0,0,0]
[null,null,null,null,"1,000 - 9,999 ppm ",0,0,0,0]
[null,null,null,null,"Notes"]
[null,null,null,null,"1 :  The effective date when the continuous ambient methane monitoring system was fully operational with alarm mechanisms programmed.\n2 :  The placement of ambient methane monitors were based on the predominant wind direction, as supported by annual wind rose data. However seasonal fluctuations in wind direction can alter the \"upwind\" or \"downwind\" designation.\n3 :  An alarm threshold is an ambient methane concentration that is equal to or greater than four times the baseline concentration.\n4 :  Data capture rate represents the percentage of valid hourly data collected to that of the total amount of hourly data possible in a reporting period."]

{"sheet":"CV","index":12,"n_rows":15,"n_cols":11,"rows_kept":15,"cut":false,"hidden":false,"merged":[[4,10,4,14],[0,0,0,14],[1,0,1,14],[2,0,3,0],[2,2,2,4],[2,6,3,14],[14,6,18,14],[8,6,8,10],[5,6,6,6],[5,7,6,7],[5,8,6,8],[5,9,6,9],[5,10,6,14],[7,10,7,14]]}
["Operator: Central Valley Gas Storage   Facility: Central Valley"]
["Continuous ambient methane monitoring implementation date1: 3/15/2021\nSummary for ambient methane monitors below includes data collected from 1/1/2022 - 12/31/2022"]
["Ambient Methane Monitor2","Upwind","Downwind",null,null,null,"Details for Continuous Ambient Methane Monitoring Alarms"]
[null,"Station 4","Station 1","Station 2","Station 3"]
["Baseline (ppm)",6,6.3,6,6.1,null,"Date / Time (PST)","Monitor","Methane (ppm)","Duration","Explanation"]
["Alarm Threshold3 (ppm)",24,25.2,24,24.4,null,"2022-10-23T08:56:00","Station 4",30.38,"15 mins 23 sec","Scheduled well pad work triggered alarm."]
["Data Capture Rate4",0.88049999999999995,0.92310000000000003,0.87909999999999999,0.87929999999999997]
["Minimum Value (ppm)",1.18,1.46,0,0]
["Maximum Value5 (ppm)",30.38,4.71,12.79,34.81,null,"Number of Leaks Reported from Daily Wellhead Screening"]
["Mean Value (ppm)",2.36,2.3199999999999998,2.89,2.88,null,null,"Q1","Q2","Q3","Q4"]
[" Alarm Count",1,0,0,0,null,"≥ 50,000 ppm ",0,0,0,0]
[null,null,null,null,null,null,"10,000 - 49,999 ppm ",0,0,0,0]
[null,null,null,null,null,null,"1,000 - 9,999 ppm ",0,0,0,0]
[null,null,null,null,null,null,"Notes"]
[null,null,null,null,null,null,"1 :  The effective date when the continuous ambient methane monitoring system was fully operational with alarm mechanisms programmed.\n2 :  The placement of ambient methane monitors were based on the predominant wind direction, as supported by annual wind rose data. However seasonal fluctuations in wind direction can alter the \"upwind\" or \"downwind\" designation.\n3 :  An alarm threshold is an ambient methane concentration that is equal to or greater than four times the baseline concentration.\n4 :  Data capture rate represents the percentage of valid hourly data collected to that of the total amount of hourly data possible in a reporting period.\n5 :  The maximum ambient methane concentration for Station 3 monitor was 34.81ppm, which is above the established alarm threshold; this measurement was not considered a reportable alarm because it did not occur for 15 minutes or longer. Refer to the alarm mechanisms in the CVGS monitoring plan. "]