Information for Volunteers |
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| Site Directions Stream lists, with site location directions and volunteer assignments are available in MS-Excel files below: |
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Sampling Directions: |
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Laboratories: Analysis Method for pH and alkalinity - Care and maintenance of electrodes Barnstable CountyContact: Holly Bailey Phone Number: (508) 487-3262 x 0502 Address: Cape Cod National Sea Shore 99 Marconi Site Rd. South Wellfleet, MA Bristol County Contact: Robert Caron Phone Number: (508) 636-4524 Address: 777 Elsbree Street E-Building 206 Bristol Community College Fall River, MA Directions: Route 6 north to rotary. Go West on Presidents Ave. then turn Right at light onto Ellsbree St. Turn Right into first B.C.C. driveway, follow straight towards rear of campus and bear left at end. Look for building E across driveway (second from last). Pull up on sidewalk to service door. Essex County Franklin County
Southern Hampshire and part of Worcester County Hampden/Berkshire Counties Middlesex County Norfolk County Contact: Bob Bentley and Jim Hoberg Phone Number: Bentley: (508) 946-2225 Hoberg: (508) 295-2550 Analytical Balance Lab Plymouth, MA Worcester North Worcester South |
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Lake and Stream Sensitivity ExplainedHow aquatic environments respond to acid deposition depends on their sensitivity to acids and the quantity of acids received. Most environments are naturally buffered against acid input by neutralizing materials such as limestone. If sufficient buffering capacity exists in an environment, excessive acid input does not change the pH of the water, although it will progressively deplete its acid neutralizing capacity (ANC). The soils, bedrock, and vegetation of watersheds largely determine the capacity of aquatic resources to accommodate acid deposition, but other factors play an important role. Acid neutralizing capacity can have its full effect only when the incoming precipitation has sufficient contact time with the neutralizing material. Areas with steep slopes, shallow soils or frozen ground tend to minimize contact time, resulting in incomplete neutralization of water entering lakes and streams. Additional neutralization is provided by the biota. For example, algae generate buffering materials during photosynthesis, and microbes living in bottom sediments reduce sulfur compounds to inert forms.ANC and pH interact in an unusual way: as acid is added to a buffered system, pH changes little until the ANC approaches zero. Then, small additions of acid cause large changes in pH. Finally, pH drops precipitously and permanently to levels that few aquatic organisms can tolerate. With lower pH, levels of toxic metals leached from the watershed increase, aquatic growth is reduced, and sensitive species ranging from fish to algae disappear. If this occurs in a drinking water supply, metals will dissolve from distribution pipes resulting in high levels of iron, copper, lead and other metals.
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Acid
Rain Monitoring Project . Blaisdell House . University of Massachusetts . Amherst,
MA 01003
Beckie Finn , Statewide Coordinator
. Phone: 413-545-5979 .
Fax: 413-545-2304