Notes on Standard Method B and Standard Method CQuick Links: ● Potable Ground Water ● Surface Water ● Air ● SoilFormula ValuesPotable Ground WaterGround water concentrations that areprotective of human healthunder standard Method B and standard Method C using the equations and default values provided in the regulation are accessible in the CLARC Information System using the CLARC Database Search tool. See WAC 173-340-720(4)(b)(iii) and 173-340-720(5)(b)(iii). The following equations were used: ● Equation 720-1 (non-carcinogens) ● Equation 720-2 (carcinogens) The pre-calculated values are NOT cleanup levels. The values DO NOT account for the following: ● Consideration of applicable state and federal laws; ● Consideration of surface water impacts; ● Consideration of total site risk; ● Consideration of the NAPL limitation; ● Consideration of natural background concentrations; and ● Consideration of practical quantitation limits.Surface WaterSurface water concentrations that areprotective of human healthunder standard Method B and standard Method C using the equations and default values provided in the regulation are accessible in the CLARC Information System using the CLARC Database Search tool. See WAC 173-340-730(3)(b)(iii) and 173-340-730(4)(b)(iii). The following equations were used: ● Equation 730-1 (non-carcinogens) ● Equation 730-2 (carcinogens) The pre-calculated values are NOT cleanup levels. The values DO NOT account for the following: ● Consideration of applicable state and federal laws; ● Consideration of ecological impacts; ● Consideration of total site risk; ● Consideration of the NAPL limitation; ● Consideration of natural background concentrations; and ● Consideration of practical quantitation limits.AirAir concentrations that areprotective of human healthunder standard Method B and standard Method C using the equations and default values provided in the regu- lation are accessible in the CLARC Information System using the CLARC Database Search tool. See WAC 173-340-750(3)(b)(ii) and 173-340-750(4)(b)(ii). The following equations were used: ● Equation 750-1 (non-carcinogens) ● Equation 750-2 (carcinogens) The pre-calculated values are NOT cleanup levels. The values DO NOT account for the following: ● Consideration of applicable state and federal laws; ● Consideration of the lower explosive limit limitation; ● Consideration of total site risk; ● Consideration of natural background concentrations; and ● Consideration of practical quantitation limits.SoilSoil concentrations that areprotective of human healthunder standard Method B (unrestricted land use) and standard Method C (industrial land use) for both thedirect contact pathway (ingestion only)and theleaching pathway(protection of ground water) are accessible in the CLARC Information System using the CLARC Database Search tool. Protective concentrations based on thedirect contact pathway (ingestion only)were calculated using the equations and default values provided in the regulation. See WAC 173-340-740(3)(b)(iii)(B) and 173-340- 745(5)(b)(iii)(B). The following equations were used: ● Equation 740-1 (Method B: non-carcinogens) ● Equation 740-2 (Method B: carcinogens) ● Equation 745-1 (Method C: non-carcinogens) ● Equation 745-2 (Method C: carcinogens) Protective concentrations based on theleaching pathwaywere not precalculated. To calculate the soil concentration that is protective of ground water, use the “Work- books and User’s Guide for Calculating Cleanup Levels” and download spreadsheet tool (MTCASGL10.XLS), located at http://www.ecy.wa.gov/programs/tcp/tools/toolmain.html The pre-calculated soil concentrations are NOT cleanup levels. The values DO NOT account for the following: ● Consideration of applicable state and federal laws; ● Consideration of ecological impacts; ● Consideration of dermal contact as part of the direct contact pathway; ● Consideration of residual saturation for protection of ground water; ● Consideration of the vapor pathway; ● Consideration of total site risk; ● Consideration of natural background concentrations; and ● Consideration of practical quantitation limits.NOTE:The CLARC Information System does not provide pre-calculated values for petroleum mixtures for any media. Access the guidance portal for cleanup levels for petroleum mixtures tab for more information.