1. (1) If the Matrix Score evaluated in OAR 340-122-0330 is:

   1. (a) Greater than 40, the site must be cleaned up to at least the Level 1 standards listed in section (2) of this rule;
   2. (b) From 25 to 40, inclusive, the site must be cleaned up to at least the Level 2 standards listed in section (2) of this rule;
   3. (c) Less than 25, the site must be cleaned up to at least the Level 3 standards listed in section (2) of this rule.
2. (2) The following table contains the required numeric soil cleanup standards based on the level of Total Petroleum Hydrocarbons (TPH) as measured by the analytical methods specified in OAR 340-122-0218. [View a PDF of the table by clicking on the "Tables" link below.]

3. (3) A sample of contaminated soil must be collected from each separate release area and used to identify the petroleum product contamination present at that location. The Hydrocarbon Identification test specified in OAR 340-122-0218(1)(c) (NWTPH-HCID) must be used for that purpose. The NWTPH-HCID test is not required for petroleum product identification for releases from residential heating oil tanks. The results of the NWTPH-HCID test must be used to determine which analytical method or methods are required for verifying compliance with the Matrix cleanup levels. At locations where the soil is contaminated with both gasoline and diesel or other non-gasoline fraction hydrocarbons, the gasoline contamination must be shown to meet the appropriate gasoline cleanup standard and the diesel or other non-gasoline fraction contamination must be shown to meet the appropriate diesel cleanup standard.

   [ED. NOTE: To view attachments referenced in rule text, click here for PDF copy.]

Statutory/Other Authority

ORS 465.400 & 466.746

Statutes/Other Implemented

ORS 465.200 - 465.455 & 466.706 - 466.835

History

DEQ 13-2019, amend filed 05/16/2019, effective 05/16/2019
DEQ 23-1998, f. & cert. ef. 11-2-98
DEQ 13-1992, f. 6-9-92, cert. ef. 10-1-92
DEQ 46-1990, f. 12-26-90, cert. ef. 3-1-91
DEQ 15-1989, f. & cert. ef. 7-28-89 (and corrected 8-3-89)