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. Author manuscript; available in PMC: 2021 Dec 1.
Published in final edited form as: Atmos Environ (1994). 2020 Aug 11;242:117818. doi: 10.1016/j.atmosenv.2020.117818

Table 1.

Annual particle-bound PAH concentrations (ng/m3) at the Fresno Central Site for PAHyears 2001–2019.

PAHyear Annual Number Observations Annual Mean Standard deviation Annual Median Winter Number Observations Winter mean Winter Standard deviation Winter Median Ratio of Winter to Annual means
2001 365 10.86 12.84 4.74 120 24.67 13.98 22.06 2.27
2002 365 9.14 10.02 4.48 120 19.76 10.85 18.9 2.16
2003 365 8.49 8.99 4.08 120 18.03 9.66 16.74 2.12
2004 324 5.25 6.66 2.43 79 13.48 8.83 11.13 2.57
2005 365 4.20 4.44 2.43 120 8.18 5.68 6.24 1.95
2006 365 4.09 4.07 2.29 120 8.16 4.75 7.38 1.99
2007 296 5.41 4.24 3.72 120 8.08 5.01 7.26 1.49
2008 273 * * * 119 11.28 6.76 9.46 *
2009 61 * * * 61 * * * *
2010 0 * * * 0 * * * *
2011 145 * * * 5 * * * *
2012 178 * * * 116 10.33 6.25 9.90 *
2013 98 * * * 98 7.61 4.80 6.93 *
2014 195 * * * 0 * * * *
2015 362 3.33 3.68 1.54 117 7.07 4.32 6.01 2.12
2016 366 3.86 4.43 1.57 121 8.48 5.04 7.70 2.20
2017 354 2.95 3.54 1.46 109 6.10 4.72 4.67 2.06
2018 365 4.11 4.66 1.82 120 8.72 5.68 7.07 2.12
2019 212 * * * 120 7.50 5.07 6.37 *
*

Insufficient measurement days for a valid average.