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BAAQMD Refinery Flare Emission Report

Marathon / Tesoro - Main Refinery

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June - 2023

Date	Vent Gas Flow	Methane	NMHC	Sulfur Dioxide
(mo/day/yr)	(volume in SCFD) See note ****	(lbs)	(lbs)	(lbs)
6/1/2023	0.00	51.21	0.00	0.00
6/2/2023	0.00	51.20	0.00	0.00
6/3/2023	0.00	51.18	0.00	0.00
6/4/2023	1,546,893.70	759.86	430.47	4.80
6/5/2023	2,222,485.99	533.10	158.79	7.47
6/6/2023	3,689,642.04	990.49	174.74	12.09
6/7/2023	4,560,328.05	1,072.70	250.89	36.93
6/8/2023	1,419,282.67	564.15	91.66	4.86
6/9/2023	31,662.85	72.94	3.24	0.08
6/10/2023	42,228.80	72.40	5.74	0.14
6/11/2023	0.00	51.21	0.00	0.00
6/12/2023	0.00	51.22	0.00	0.00
6/13/2023	0.00	51.22	0.00	0.00
6/14/2023	0.00	51.20	0.00	0.00
6/15/2023	3,244,234.21	622.41	258.13	45.77
6/16/2023	4,119,447.01	822.08	190.49	13.42
6/17/2023	37,067.41	64.28	3.70	0.10
6/18/2023	32,694.46	73.98	3.38	0.11
6/19/2023	0.00	51.23	0.00	0.00
6/20/2023	0.00	51.22	0.00	0.00
6/21/2023	0.00	51.21	0.00	0.00
6/22/2023	0.00	51.24	0.00	0.00
6/23/2023	0.00	51.23	0.00	0.00
6/24/2023	0.00	51.22	0.00	0.00
6/25/2023	0.00	51.23	0.00	0.00
6/26/2023	39,630.59	78.18	4.34	0.13
6/27/2023	28,076.23	71.28	2.62	0.09
6/28/2023	9,327.85	58.06	0.80	0.02
6/29/2023	0.00	51.14	0.00	0.00
6/30/2023	189,474.64	136.16	17.41	0.67
June Totals	21,212,476.50	6,760.23	1,596.40	126.68

* Natural gas is used for both pilot and purge gas for the refinery flare system, except for the Emergency Flare, North and South Steam Flares, and East Air Flare (Maintenance) that uses nitrogen as purge gas.
The flow is determined using an orifice calculation based on the orifice size in the lines and the line pressure upstream of the orifice.

**** Vent Gas Flow is vent gas to air flares and DCU flare instead of sum of flare header flows
In the case of an invalid sample, the monthly average was used for composition data

Marathon / Tesoro Main Refinery Flare Report 6/1/2023 - 6/30/2023

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Last Updated: 4/13/2023