Upload
donna-walters
View
214
Download
0
Tags:
Embed Size (px)
Citation preview
Field Chemistry
Developed by Ken CookeKentucky Division of Water
Watershed Watch Program Coordinator
Modified by Mike KempProfessor of Environmental Engineering Technology
Murray State University
Field Chemistry Tests
• pH• Dissolved Oxygen• Conductivity• Temperature
*Some things are best done in person.
Field Chemistry Equipment
Testing strips such as pH paper and “dip strips” are not as accurate.
• Testing kits• Alcohol or mineral spirit • thermometers • Conductivity/TDS Meters• (calibrated) • pH meters calibrated with • 4-7-10 standard solutions
1514131211109876543210
Dissolved Oxygen Levels
0-4 mg/l = poor4-7 mg/l = fair7-10 mg/l = good10-14 mg/l = excellentover 14 = ? (Check your test!)
1500140013001200110010009008007006005004003002001000
Conductivity O
il and Gas W
ell Discharge
The higher the number, the poorer the quality.
Waste W
ater Impact
Norm
al Stream
Rain
Field Observations
• Flow (0-5 point scale)• 24 hour rainfall (in inches)• Turbidity (0-3 point scale)
*Some things are best done in person.
0=Dry
4=Bank Full
5=Flood!
Flow Observations
0 = Dry1 = Ponded2 = Low3 = Normal4 = Bank Full5 = FLOOD!
*Get to know your creek.
Estimate rainfall in your watershedin quarter inches for the last 24 hours.
Use Weather Channel, local paper orToad Gauge.
Value Observation NTUs
0 Crystal Clear 0 NTUs
1 Clear 1-3 NTUs
2 Cloudy 4-12 NTUs
3 Muddy >12 NTUs
Turbidity (0-3 point scale)
Other Observations to Make
Putrescent or otherwise objectionable bottom deposits
Oil, scum, and floating debris in amounts that are unsightly
Nuisance levels of odor, color, other conditions
• DO kit• pH kit• Thermometer• Spent chemical waste container• Conductivity meter and screwdriver• “Blue Book” of instructions• Recording forms• Pencil• First aid kit
Field Chemistry Check List
Equipment Use
• There are hazardous chemicals in these kits!
• DO test uses a strong alkali (like bleach).
• pH test chemical is flammable.• Read Material Safety Data Sheets for
handling and disposal instructions.• Use plastic spent chemical waste
container at stream.• Dispose of waste properly at home.