Table 2.

Beach sand characteristics at Florida beaches^a

Study	Moisture (wt%)			Calcium carbonate (wt%)			Median grain size (mm)			Possible sourcesc
	Supra	Inter	Sub	Supra	Inter	Sub	Supra	Inter	Sub	Human	Dog	Bird	Rain (mm)
Ten-day studyb
6/1	7.0	18.4	22.0	19.6	20.4	40.5	0.4	0.7	1.0	40	5	8	4.7
6/2	8.0	19.3	26.1	25.7	20.3	42.1	0.4	0.5	0.9	50	5	6	0.5
6/3	9.0	16.4	27.1	31.8	21.8	61.7	0.4	0.5	0.9	74	4	7	0.2
6/4	11.6	18.6	28.0	39.2	19.6	46.6	0.4	0.5	0.7	93	9	0	24.3
6/5	12.0	20.1	21.2	42.8	34.2	37.0	0.4	0.5	1.0	249	19	0	3.1
6/6	10.4	17.8	21.8	48.1	49.4	27.5	0.4	0.5	0.8	294	20	11	2.8
6/7	8.2	20.2	25.3	52.1	22.5	61.3	0.4	0.4	1.2	80	1	0	2.1
6/8	12.8	21.8	28.5	43.2	36.9	68.0	0.4	0.5	1.4	73	6	15	24.2
6/9	11.3	19.8	27.4	31.1	20.1	45.5	0.4	0.7	1.1	144	12	0	0
6/10	6.1	20.4	25.7	22.9	46.9	68.8	0.4	0.6	0.7	175	6	7	0
September multiple-beach study
Hallandale	2.3	6.3	21.2	53.7	73.9	58.0	0.4	0.6	0.4	0	0	0	0
Sunny Isles	2.1	5.2	17.2	72.8	83.2	94.9	0.5	0.8	1.5	0	0	0	0
Haulover	2.9	4.1	18.1	94.4	95.9	98.5	0.8	1.0	1.4	0	0	0	0
South Beach	3.1	18.6	23.4	87.2	86.2	90.5	0.4	0.3	0.3	0	0	0	0
Hobie	2.1	4.2	17.9	0.6	1.2	3.8	0.7	0.7	0.6	0	0	0	0
Crandon	3.1	17.2	21.3	40.2	60.4	61.9	0.5	0.4	0.5	0	0	0	0
Bill Baggs	1.8	5.1	20.5	38.9	45.9	68.1	0.3	0.4	0.5	0	0	0	0
Matheson	9.0	15.6	20.0	35.4	24.8	15.5	0.6	0.4	0.7	0	0	0	0
February multiple-beach study
Hallandale	3.5	6.6	20.4	68.9	70.3	93.9	0.6	1.5	0.7	0	0	0	0
Sunny Isles	1.8	6.1	21.6	60.2	65.4	67.1	0.5	0.4	0.5	0	0	0	0
Haulover	3.7	7.3	23.8	95.4	93.9	98.5	0.9	1.5	0.7	0	0	0	0
South Beach	4.5	11.2	25.1	85.8	85.8	90.7	0.3	0.4	0.3	0	0	0	0
Hobie	0.2	6.4	20.1	0.9	1.4	1.4	0.5	0.5	0.7	0	0	0	0
Crandon	1.4	18.6	22.2	42.1	52.2	57.2	0.3	0.4	0.4	0	0	0	0
Bill Baggs	2.1	18.7	23.8	40.5	58.0	73.7	0.4	0.5	0.6	0	0	0	0
Matheson	11.1	15.3	22.2	23.9	17.2	13.9	0.4	0.5	0.4	0	0	0	0

^aSupra, supratidal; inter, intertidal; sub, subtidal.

^b6/1, etc., indicate month and day of collection.

^cReported as the number of humans, dogs, or birds present at the beach during sampling.