Table 18.
Recommended clearance exposure guidelines for incidental soil and drinking water ingestion of selected CWAs and TICs.a
| Residential soil (lifetime) |
Industrial soil (lifetime) |
15 liter/day consumption (<7 day) |
|||
| CWA or TIC | Preliminary Remediation Goal (PRG) (mg/kg) | Risk-Based Concentration (RBC) (est.) (mg/kg) | Preliminary Remediation Goal (PRG) (mg/kg) | Risk-Based Concentration (RBC) (est.) (mg/kg) | Drinking water concentration (μg/liter) |
| Tabun (GA) | <2.8 (est.) | <3.1 | <68 (est.) | <82 | <46 |
| Sarin (GB) | <1.3 (est.) | <1.6 | <32 (est.) | <41 | <9.3 |
| Soman (GD) and | <0.22 (est.) | <0.31 | <5.2 (est.) | <8.2 | <4 (GD only; also |
| Cyclosarin (GF) | applicable for generic nerve agent) | ||||
| VX | <0.042 (est.) | <0.047 | <1.1 (est.) | <1.2 | <5 |
| Sulfur mustard | <0.01 (est.) | <0.55 | <0.3 (est.) | <14 | <47 |
| (H/HD) | |||||
| Hydrogen cyanide | <1.6 × 103 | Unavailable | <2.0 × 104 | Unavailable | <2 |
| (AC) | |||||
| Cyanogen chloride | <3.9 × 103 | Unavailable | <5.1 × 104 | Unavailable | Unavailable |
| (CK) | |||||
| Phosgene (CG) | Unavailable | Unavailable | Unavailable | Unavailable | Unavailable |
aCalculated Regional Screening Levels (RSLs) for residential soil (See Table 6 and footnote d) are duplicative of above PRG and RBC estimates for residential soil.