(b) Routine water well inspections. Routine water well inspections for which no specific complaint of excessive sediment has been received shall include the following sampling process using Environmental Protection Agency Test Method 160.5 (Imhoff Cone) and United States Geological Survey-approved five hundred milliliter (500 ml) sample bottles:

1. (1) The well shall be purged by three (3) volumes of water;
2. (2) Five (5) samples shall be collected over a two-hour period, spaced at a minimum of twenty-minute intervals;
3. (3) Sediment volume shall be estimated from all five (5) samples and averaged to determine the amount of sediment produced by the well; and

4. (4)

   1. (A) Data shall be recorded on a commission inspection form.
   2. (B) If it is determined that the sediment amount exceeds five milligrams per liter (5 mg/L), the commission staff member shall follow the protocol outlined in subdivision (c) of this section.

(c)

1. (1) Investigation of excessive sediment complaints or wells that produce more than five milligrams per liter (5 mg/L) of sediment.

2. (2) If a complaint of excessive sediment is received, or if a routine well inspection reveals that a well is producing more than five milligrams per liter (5 mg/L) of sediment, the following sampling process using Environmental Protection Agency Test Method 160.5 (Imhoff Cone) and United States Geological Survey-approved five hundred milliliter (500 ml) sample bottles shall be followed:

   1. (A)

(i) Staff inspectors shall coordinate with a commission-registered geologist or engineer who has been trained in water quality data collections.

1. (ii) These two (2) individuals will conduct the sampling of the well in question;

   1. (B) The well shall be purged by three (3) volumes;
   2. (C) Five (5) samples shall be collected over a two-hour period, spaced at a minimum of twenty-minute intervals;

   3. (D)

      1. (i) At the time of sampling, a data collection sheet shall be completed.
      2. (ii) The data collection sheet shall include, at a minimum:

(b) (b) Time each sample was collected;

1. (c) (c) Well location, to include longitude and latitude;

   1. (d) (d) Well owner information;

(h) (h) General description of the area, including a site sketch if possible;

1. (E)

   1. (i) All efforts to prevent sample contamination shall be used to include the use of the United States Geological Survey-approved five hundred milliliter (500 ml) sample bottles.

      1. (ii) After the samples are collected, the bottles are to be sealed and labeled with the date and the initials of the person collecting the sample;

   2. (F) Following the sealing of the samples, a Chain of Custody form shall be completed by the employee who completed the sampling and shall include:

      1. (i) Information from the data collection sheets;
      2. (ii) Names of the personnel collecting the samples;
      3. (iii) Name and location of the lab the sample was taken to; and
      4. (iv) Initials of the lab personnel who accepted delivery of the samples;

   3. (G)

      1. (i) Samples shall be placed on ice and kept at cool temperatures until they are delivered to a qualified water quality testing laboratory.
      2. (ii) The samples shall be delivered to a qualified laboratory within seventy-two (72) hours of collection; and
   4. (H) Sediment volume shall be estimated from all five (5) samples and averaged to determine the amount of sediment produced by the well using Environmental Protection Agency Test Method 160.5.