Petroleum hydrocarbon concentration (µg compound / kg sand).

<p><sup>a</sup> Beach abbreviations: BSt = Bay St. Louis, GE = Gulfport East, StA = St. Andrews, OB = Orange, Beach, FP = Fort Pickens, Hen = Henderson, StG = St. George. Month abbreviations: Jun = June, Aug = August, Sep = September, Nov = November. Only beach – month combinations where petroleum hydrocarbons were detected are shown. The no-detect beach – month combinations include: BSt – Aug, BSt – Sep, BSt – Nov, GE – Nov, StA – Jun, StA – Sep, StA – Nov, OB – Aug, OB – Sep, OB – Nov, FP – Aug, FP – Sep, FP – Nov, Hen – Jun, Hen – Aug, Hen – Sep, Hen – Nov, StG – Jun, StG – Sep, StG – Nov.</p><p>Petroleum hydrocarbon concentration (µg compound / kg sand).</p>