These dBase files contain geochemical data as reported 
by the Analytical Sciences Laboratory (Holm Research 
Center) of the University of Idaho.  The data has not 
been modified in any way.  The samples that have U of I
lab numbers ending in A are unfiltered samples on which
the total metals screen was done.  The samples that have 
U of I lab numbers ending in B are filtered samples on
which the dissolved metals screen was done.

The analytical results are reported in the following
units:


Water samples:

Total Recoverable Metal Screen (EPA 200.7) --
	mg/L (milligrams per liter) = ppm

Dissolved Metal Screen (EPA 200.7) --
	µm/mL (micrograms per milliliter) = ppm

Lead (EPA 239.2), Arsenic (EPA 206.2), and Mercury (ICP, 
Cold Vapor) --
	µg/L (micrograms per liter) = ppb


Soil samples (dump samples and tailings samples):

Element Screen (EPA 3050) --
	µg/g (micrograms per gram) = ppm

TCLP (Toxicity Characteristic Leaching Procedure, EPA
1311) --
	µg/L (micrograms per liter) = ppb


Sample numbers:

All water, tailings, and dump samples were assigned 
unique numbers.  These were constructed according to 
the following system:  

1) an initial letter code (usually the first letter 
of the last name) identifying the person who took 
the sample; 

2) one or two digits for the month (some sample 
numbers contain a leading zero); 

3) two digits for the date on which the sample was 
taken; 

4) the last two digits in the year in which the 
sample was taken (i.e., "97," if the samples was taken 
in 1997); and 

5) one to three digits, including leading zeros, 
identifying the individual sample.  

Site numbers for properties that did not have a 
database identification number assigned to them were 
generated in the same manner.