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Virginia Administrative Code
Title 9. Environment
Agency 25. State Water Control Board
Chapter 580. Underground Storage Tanks: Technical Standards and Corrective Action Requirements
12/5/2019

9VAC25-580-260. Site Characterization.

A. Owners and operators must assemble information about the site and the nature of the release, including information gained while confirming the release or completing the initial abatement measures in 9VAC25-580-230 and 9VAC25-580-240. This information must include, but is not necessarily limited to, the following:

1. Data on the material released and the estimated quantity of release;

2. Data from available sources or site investigations concerning the following:

a. Site assessment to include: data on the physical/chemical properties of the contaminant; nature and quantity and extent of the release; evidence that free product is found to need recovery; geologic/hydrologic site characterization; current and projected land/water uses; water quality; subsurface soil conditions; evidence that contaminated soils are in contact with the groundwater; locations of subsurface conduits (e.g., sewers, utility lines, etc.); and climatological conditions. Samples collected for this site characterization shall be tested according to established EPA analytical methods or methods approved by the board;

b. Risk (exposure) assessment to include: evidence that wells of the area have been affected; use and approximate locations of wells potentially affected by the release; identification of potential and impacted receptors; migration routes; surrounding populations; potential for additional environmental damage;

c. Remediation assessment to include: potential for remediation and applicability of different remediation technologies to the site.

3. Results of the site check required under subdivision A 5 of 9VAC25-580-250; and

4. Results of the free product investigations required under subdivision A 6 of 9VAC25-580-250, to be used by owners and operators to determine whether free product must be recovered under 9VAC25-580-270.

B. Within 45 days of release confirmation or another reasonable period of time determined by the board upon written request made and approved within 45 days after release confirmation, owners and operators must submit the information collected in compliance with subsection A of this section to the board in a manner that demonstrates its applicability and technical adequacy, or in a format and according to the schedule required by the board.

Statutory Authority

§§ 62.1-44.15 and 62.1-44.34:9 of the Code of Virginia; 42 USC § 6901 et seq.; 40 CFR Parts 280 and 281.

Historical Notes

Derived from VR680-13-02 § 6.4, eff. October 25, 1989; amended, Volume 34, Issue 01, eff. January 1, 2018.

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