Assessment of spatial variation of ambient volatile organic compound levels at a power station in Kuwait

Figures & data

Table 1. Locations of air sampling at DWPS.

Sampling point	Remarks	GPS coordinates
		X	Y
DWPS-AP01	Lamp post near DWPS’s main gate	769923	3251928
DWPS-AP02	Lamp post along the western security route of DWPS	769993	3251556
DWPS-AP03	Lamp post on the southwestern corner of DWPS’s fenced area	770135	3251033
DWPS-AP04	Sampling mast of the mobile air pollution laboratory (MAPL) at a point along the southern perimeter of DWPS at 1 km downwind of DWPS’s chimneys	771037	3251080
DWPS-AP05	Electricity grid post along the southern perimeter of DWPS, 1.14 km downwind of DWPS’s chimneys (0.4 km east of DW-AP04)	771403	3251195
DWPS-AP06	Fence along the southern security route of DWPS	771248	3251475
DWPS-AP07	Lamp post in the northwestern corner of DWPS	770221	3252327
DWPS-AP08	Metal platform 125 m south of DWPS’s water intake	770634	3252221
DWPS-AP09	Fence in the northeastern corner of DWPS’s fenced area	771029	3252445
DWPS-AP10	35 m north of fuel storage tank C	771010	3252075

Note. DWPS = Doha West Power Station.

Figure 1. Satellite image showing the ambient air quality monitoring locations at the DWPS.

Table 2. Meteorological data at each sampling point around DWPS.

Sampling point	Average temperature (°C)	Average wind speed (m/sec)	Average wind direction	Calm wind (%)
DWPS-AP01	19.36	6.11	NW	0.00
DWPS-AP02	19.22	6.14	NW	0.00
DWPS-AP03	17.96	1.41	NE	12.50
DWPS-AP04	18.14	7.29	N to NW	0.00
DWPS-AP05	21.19	1.54	SAO	3.13
DWPS-AP06	15.97	5.37	NE and NW	0.00
DWPS-AP07	18.16	6.99	N to NW	0.00
DWPS-AP08	21.28	1.57	SAO	3.13
DWPS-AP09	16.80	2.05	NE	1.04
DWPS-AP10	17.91	1.44	NE	12.50

Note. DWPS = Doha West Power Station; SAO = spread all over.

Figure 2. (a) The wind rose plot of the sampling point DWPS-AP05. (b) The wind class frequency distribution of the sampling point DWPS-AP05.

Table 3. Total VOC concentrations and the most abundant compounds at selected locations around DWPS.

	HC				AR				HG				OX
Location	TC^a (ppbv)	Con^b %	AC^c	Max %	TC (ppbv)	Con %	AC	Max %	TC (ppbv)	Con %	AC	Max %	TC (ppbv)	Con %	AC	Max %
DWPS-AP01	6.50	8.12	Propene	63	1.66	2.07	Toluene	38	60.36	75.39	1,2,4-Trichlorobenzene	52	11.54	14.42	Nonanal	30
DWPS-AP 02	6.32	7.77	Propene	66	0.95	1.17	Toluene	57	42.67	52.47	1,2,4-Trichlorobenzene	40	31.39	38.59	Nonanal	71
DWPS-AP 03	6.49	9.40	Propene	70	2.99	4.33	Toluene	46	40.76	59.02	Vinyl chloride	26	18.83	27.26	Methanol	53
DWPS-AP 04	8.29	5.93	Propene	69	3.66	2.61	Toluene	32	69.14	49.41	1,1,2,2-Tetrachloroethane	32	58.85	42.05	Nonanal	72
DWPS-AP 05	8.59	6.79	Propene	69	2.89	2.28	Toluene	37	95.31	75.34	1,2,4-Trichlorobenzene	28	19.71	15.58	Nonanal	32
DWPS-AP 06	25.12	15.11	Propene	52	2.72	1.63	1,3,5-Trimethylbenzene	25	114.06	68.60	Vinyl chloride	33	24.37	14.65	Nonanal	57
DWPS-AP 07	8.64	19.19	Propene	72	0.39	0.88	Benzene	52	27.96	62.10	Vinyl chloride	40	8.03	17.83	Nonanal	35
DWPS-AP 08	5.03	9.43	Propene	65	1.25	2.34	Benzene	45	34.83	65.26	Vinyl chloride	25	12.26	22.97	Methanol	44
DWPS-AP 09	4.71	5.88	Propene	67	1.68	2.10	Toluene	39	48.07	59.97	1,2,4-Trichlorobenzene	48	25.70	32.06	Nonanal	36
DWPS-AP 10	21.75	17.55	Propene	73	3.59	2.90	Toluene	26	80.24	64.73	Vinyl chloride	31	18.38	14.83	Methanol	45

^aTC = total concentration (ppbv).

^bCon % = Total group concentration/Total VOC concentration (%).

^cAC = the most abundant compound.

Figure 3. The most abundant compounds around DWPS.