SIP Calls for excess emissions --- Sulfur Dioxide

 

 

State Implementation Plans:

 

The Louisiana DEQ must submit a plan to the United States EPA that demonstrates changes at the nearby plants will bring the air quality of St Bernard Parish into healthy levels for Sulfur Dioxide.
 
Currently, St Bernard Parish’s air quality is in violation of the one-hour health standard for sulfur dioxide [ 75 ppb ], and the amount of sulfur dioxide in our air is causing public health issues.  

Sulfur dioxide is a nonflammable, colorless gas that is heavier than air, and has a strong, pungent odor with irritating properties.

 

Acute exposure occurs when sulfur dioxide levels are ten parts per billion (10 ppb) for 15 minutes; it is not uncommon to have acute exposure events in St Bernard Parish.

  

Below is a chart of 5 minute readings from various days at the Chalmette Vista monitor, which is located at the site of Blue Bird Park playground.  The one-hour average is displayed as CDLST intervals.  The 5 minute chart illustrates the importance of keeping the one-hour average below 75 ppb, and easily shows how often the 15 minute intervals with concentrations of sulfur dioxide at or higher than 10 ppb occur.

CHALMETTE VISTA SO2 005m
Date	Time (CST)	Final Value (PPB)
July 4, 2016	16:00	6.0
July 4, 2016	16:05	4.2
July 4, 2016	16:10	4.0
July 4, 2016	16:15	3.4
July 4, 2016	16:20	25.9
July 4, 2016	16:25	67.4
July 4, 2016	16:30	19.1
July 4, 2016	16:35	14.0
July 4, 2016	16:40	22.6
July 4, 2016	16:45	35.9
July 4, 2016	16:50	83.5
July 4, 2016	16:55	66.0
5 pm (CDLST) one-hour avg		29.3 ppb
July 4, 2016	17:00	44.9
July 4, 2016	17:05	190.8
July 4, 2016	17:10	178.0
July 4, 2016	17:15	169.3
July 4, 2016	17:20	140.2
July 4, 2016	17:25	146.5
July 4, 2016	17:30	170.9
July 4, 2016	17:35	118.0
July 4, 2016	17:40	18.8
July 4, 2016	17:45	95.7
July 4, 2016	17:50	88.9
July 4, 2016	17:55	61.5
6 pm (CDLST) one-hour avg		118.6 ppb
July 6, 2016	16:00	62.4
July 6, 2016	16:05	8.0
July 6, 2016	16:10	5.1
July 6, 2016	16:15	13.0
July 6, 2016	16:20	84.0
July 6, 2016	16:25	97.4
July 6, 2016	16:30	31.1
July 6, 2016	16:35	37.9
July 6, 2016	16:40	147.7
July 6, 2016	16:45	29.0
July 6, 2016	16:50	16.9
July 6, 2016	16:55	55.9
6pm (CDLST) one-hour avg		49 ppb
July 6, 2016	17:00	9.0
July 6, 2016	17:05	6.5
July 6, 2016	17:10	63.5
July 6, 2016	17:15	127.7
July 6, 2016	17:20	145.4
July 6, 2016	17:25	189.4
July 6, 2016	17:30	216.6
July 6, 2016	17:35	173.1
July 6, 2016	17:40	20.5
July 6, 2016	17:45	19.6
July 6, 2016	17:50	12.2
July 6, 2016	17:55	6.4
7pm (CDLST) one-hour avg		82.4 ppb
July 7, 2016	13:00	11.0
July 7, 2016	13:05	131.5
July 7, 2016	13:10	31.6
July 7, 2016	13:15	60.2
July 7, 2016	13:20	164.2
July 7, 2016	13:25	38.6
July 7, 2016	13:30	29.3
July 7, 2016	13:35	56.9
July 7, 2016	13:40	25.8
July 7, 2016	13:45	24.6
July 7, 2016	13:50	285.2
July 7, 2016	13:55	54.0
3pm (CDLST) one-hour avg		76 ppb
July 7, 2016	14:00	22.0
July 7, 2016	14:05	111.6
July 7, 2016	14:10	23.9
July 7, 2016	14:15	20.9
July 7, 2016	14:20	148.6
July 7, 2016	14:25	89.8
July 7, 2016	14:30	12.4
July 7, 2016	14:35	7.6
July 7, 2016	14:40	6.4
July 7, 2016	14:45	37.4
July 7, 2016	14:50	32.1
July 7, 2016	14:55	38.2
4pm (CDLST) one-hour avg		45.9 ppb
July 7, 2016	15:00	252.6
July 7, 2016	15:05	137.2
July 7, 2016	15:10	38.8
July 7, 2016	15:15	101.5
July 7, 2016	15:20	38.0
July 7, 2016	15:25	52.2
July 7, 2016	15:30	9.4
July 7, 2016	15:35	7.2
July 7, 2016	15:40	7.7
July 7, 2016	15:45	5.9
July 7, 2016	15:50	20.2
July 7, 2016	15:55	142.2
4pm (CDLST) one-hour avg		67.7 ppb
July 7, 2016	18:00	122.1
July 7, 2016	18:05	118.6
July 7, 2016	18:10	113.3
July 7, 2016	18:15	161.8
July 7, 2016	18:20	127.5
July 7, 2016	18:25	25.3
July 7, 2016	18:30	21.5
July 7, 2016	18:35	28.9
July 7, 2016	18:40	10.7
July 7, 2016	18:45	13.8
July 7, 2016	18:50	8.4
July 7, 2016	18:55	6.6
7pm (CDLST) one-hour avg		63.2 ppb