The responsible party will present a site assessment plan to this Agency in which sampling locations will be shown. Samples will be analyzed by a State certified laboratory for the following chemical constituents (all soil sampling shall be done per EPA Method 5035):
Benzene, toluene, ethylbenzene, xylene (BTEX) by EPA Method 8021.
Halogenated volatile organics by EPA Method 8260B.
CAM metal analysis by EPA Method 6020 (ICPMS).
TPH [Total petroleum hydrocarbons] by EPA Method 8015M.
PAH's [Polynuclear aromatics] by EPA Method 8270 (SIM).
Solvents by EPA 8260B.
Other materials that site history may reveal were used on site
If the above analyses indicate that only TPH is present, the property will be considered a "crude oil only" site and the following cleanup criteria will be used:
- All contaminated soil under 100 ppm TPH can be left in place.
- All contaminated soil with TPH values under 1000 ppm will be acceptable provided the contamination can be shown to consist of only heavy, non volatile, high molecular weight hydrocarbons as determined by EPA Method 8015M.
- All contaminated soil with TPH values greater than 1000 PM but less than 5000 ppm shall be treated in the following manner: This contamination may be left in place if the ground is not significantly discolored and the areas of contamination are not located within 5 feet of the top finished grade height. All locations where this amount of contamination is present shall be identified on the site plans.
If the soil testing analyses indicate that other constituents are present such as BTEX, aromatic hydrocarbons, or heavy metals the above "crude oil only " standard will apply if the BTEX, PHAs, solvents and heavy metal components are either below the acceptable Federal Region 9 Preliminary Remediation Goals 1996. If the levels are above the PRGs a risk assessment, verified by the Torrance Fire Department, Hazardous Materials Division, can be submitted to show that the remaining concentrations do not present a risk to any future tenants, workers or children.
