Ariz. Admin. Code § R18-12-280 - Sampling Requirements

A. Required analytical procedures. For all sampling under this Chapter, an owner or operator shall:

1. Analyze samples for the chemicals of concern associated with regulated substances stored in the UST during its operational life by analytical test methods that are approved for analysis of each chemical of concern under 9 A.A.C. 14, Article 6. Before collecting samples, the Department may approve, a different procedure after considering whether the analytical data will be representative of the concentrations and compositions of volatile regulated substances existing in the contaminated medium;

2. Perform sample analyses using a laboratory licensed for the selected analytical method by the Arizona Department of Health Services under A.A.C. R9-14-601 through A.A.C. R9-14-617; and

3. Analyze samples within the specified time period required for the analytical test method under A.A.C. R9-14-601 through A.A.C. R9-14-617.

B. Quality assurance and quality control (QA/QC). For all required sampling under this Chapter, an owner or operator shall:

1. Decontaminate sampling equipment as provided in R18-12-281(Q);

2. Handle and transport samples using a methodology that will result in analytical data that is representative of the concentrations and compositions of the chemicals of concern that may exist in the contaminated medium;

3. Follow chain-of-custody procedures under R18-12-281(T), for all required sampling, including the condition and temperature of the samples received by the laboratory on the chain-of-custody record; and

4. Follow generally accepted industry standards. For the purpose of subsection (B), "generally accepted industry standards" means those QA/QC procedures that are described in publications of national organizations concerned with corrective actions or that otherwise appear in peer-reviewed literature.

C. Soil sampling. An owner or operator shall perform all soil sampling required under this Chapter using a methodology that will result in analytical data that is representative of the concentrations and compositions of the chemicals of concern that may exist in the contaminated soil. The owner or operator shall use a sampling method that is based on consideration of all of the following criteria:

1. The specific chemicals of concern potentially involved,

2. Site-specific lithologic conditions,

3. Depth of sample collection, and

4. Generally accepted industry standards. For the purpose of subsection (C), "generally accepted industry standards" means those soil sampling activities that are described in publications of national organizations concerned with corrective actions or that otherwise appear in peer-reviewed literature.

D. Groundwater sampling. An owner or operator shall perform all required groundwater sampling under this Chapter using a methodology that will result in analytical data that is representative of the concentrations and compositions of the chemicals of concern that may exist in the groundwater. The owner or operator shall use a sampling method that is based on consideration of all of the following criteria:

1. The specific chemicals of concern potentially involved,

2. Site-specific hydrologic conditions,

3. Site-specific monitor well construction details,

4. Depth of sample collection, and

5. Generally accepted industry standards. For the purpose of subsection (D), "generally accepted industry standards" means those groundwater sampling activities that are described in publications of national organizations concerned with corrective actions or that otherwise appear in peer-reviewed literature.

E. Surface water sampling. An owner or operator shall perform all required surface water sampling under this Chapter using a methodology that will result in analytical data that is representative of the concentrations and compositions of the chemicals of concern that may exist in the surface water. The owner or operator shall use a sampling method that is based on consideration of all of the following:

1. The specific chemicals of concern involved or potentially involved,

2. Site-specific hydrologic conditions, and

3. Generally accepted industry standards. For the purpose of subsection (E), "generally accepted industry standards" means those surface water sampling activities that are described in publications of national organizations concerned with corrective actions or that otherwise appear in peer-reviewed literature.

Notes

Ariz. Admin. Code § R18-12-280

Adopted effective July 30, 1996 (Supp. 96-3). Amended by final rulemaking at 8 A.A.R. 3894, effective August 20, 2002 (Supp. 02-3). Amended by final rulemaking at 25 A.A.R. 3123, effective 1/1/2020.