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Courses - CHEM 201: Spring 1998 Results

All results in mg/L unless otherwise noted. Numbers within parenthesis - standard deviation

Athletic Field Pond:

Sodium: 21.5 (3.0)
Potassium: 2.8 (0.6)
Iron: below detection limit
Chloride: 283 (78)
Calcium: 61 (6), 39 (3)
Magnesium: 28 (6), 5 (3)
Fluoride in pond: 0.03 (range 0.007 to 0. 16)
Fluoride in fountain across lab: 0.46 (range 0. 1 3 to 1. 64)
Conductivity (microsiemens/cm): 0.545 (0.002), 0.484 (0.004)
TDS meter: 281(2), 250 (2)
TDS gravimetry method: 366, 312
Dissolved Oxygen from titration: 15.2, 14.5
DO meter: 11.0
Nitrate: 760 ng/mL (ppb)
Alkalinity (CaCO3 mg/L): 311, 251, 295
pH: 7.7, 7.5

Nature Preserve Ponds:

DO meter: 9.6 (0.3)
DO titration: 9.2 (l.6), 8.9
TDS meter: 25.6 (0.5), 25.9 (0.5)
TDS (gravimetry): 98, 98
Conductivity (S/cm x I OE-6): 39.8 (0.8), 39.9 (0.8)
Calcium: 3.8 (0.5)
Iron: 1.13 (0.03)
Sodium: 2.6 (0.1)
pH: 6.5 8, 6.52, 6.62, 6.56
Alkalinity (CaCO3 mg/L): 17,16
Nitrates: 0.33, 0.2

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Results: Spring 1997 | Fall 1998