Table 2.  Number of samples collected each month at urban indicator site, Salado Creek (lower station) at San Antonio

[SOC/DOC, suspended and dissolved organic carbon; VOCs, volatile organic compounds]

Type of sample 1996   1997   1998
Apr. May June July Aug. Sept. Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June July Aug. Sept. Oct. Nov. Dec. Jan. Feb. Mar. Apr.
Major ions 1 1 1 1 0 1 1 1 1 1 2 2 4 5 2 4 4 4 2 2 3 4 2 2 1
Nutrients 1 1 1 1 0 1 1 1 1 1 2 2 4 5 2 4 4 4 2 2 3 4 2 2 1
SOC/DOC 1 1 1 1 0 1 1 1 1 1 2 2 4 5 2 4 4 4 2 2 3 4 2 2 1
Suspended sediment 1 1 1 1 0 1 1 1 1 1 2 2 4 5 2 4 4 4 2 2 3 4 2 2 1
Pesticides 0 0 0 0 0 0 0 0 0 1 1 1 4 5 2 4 4 4 1 1 2 2 1 1 1
VOCs 0 0 0 0 0 0 0 0 0 1 2 2 2 1 0 2 1 1 2 2 3 3 0 0 0

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