1. (a) One or more water samples shall be collected from each designated monitor well (production and nonproduction zone) and each designated production well in the permit or production area. These samples will be analyzed and the results for each well submitted and summarized on forms provided by the executive director as follows:

   1. (1) mine area baseline-the averages and ranges of the parameter values determined for the designated production zone monitor wells;
   2. (2) production area baseline-the averages and ranges of the parameter values determined from at least five designated production zone wells in the production area; and
   3. (3) nonproduction zone baseline-the averages and ranges by zone of the parameter values determined for designated nonproduction zone monitor wells.
2. (b) All samples shall be collected, preserved, analyzed, and controlled according to accepted methods as stated in the permit.
3. (c) The baseline water quality values for a permit or production area shall be used to determine control parameter upper limits.

4. (d) The baseline water quality values for a permit or production area shall be used to determine restoration table values. Each production area authorization shall contain a restoration table. The table may be developed by using either:

   1. (1) the higher value in either the column headed mine area average or the column headed production area average for parameters shown on the production area baseline water quality form for the production zone; or
   2. (2) predictions of restoration quality that are reasonably certain after giving consideration to the factors specified in §331.107(f) of this title (relating to Restoration).

Source Note:The provisions of this §331.104 adopted to be effective May 13, 1986, 11 TexReg 1985.