Appendix 4-A1

RECOMMENDATIONS FOR MIS FIELD PRESERVATION OR LABORATORY SUBSAMPLING BASED ON OVERALL CHEMICAL STABILITY

Volatile Chemicals Requiring Field Preservation of Soil Sample Increments

2Vapor Pressure Henry’s Law Constant (H)
CHEMICAL PARAMETER 1Physical State Molecular Weight mm Hg (25C) (atm-m³/mol)
VOLATILE CHEMICALS
Preserve Samples in Methanol in the Field (or approved alternative, see text)
(VP>1 AND Molecular Weight <200)
ACETONE V L 58 2.3E+02 3.9E-05
BENZENE V L 78 9.5E+01 5.61E-03
BIS(2-CHLOROETHYL)ETHER V L 143 1.6E+00 1.7E-05
BROMODICHLOROMETHANE V L 164 5.0E+01 2.1E-03
BROMOFORM V S 253 5.4E+00 5.4E-04
BROMOMETHANE V G 95 1.6E+03 6.3E-03
CARBON TETRACHLORIDE V L 154 1.2E+02 2.7E-02
CHLOROBENZENE V L 113 1.2E+01 3.2E-03
CHLOROETHANE V G 65 1.0E+03 1.1E-02
CHLOROFORM V L 119 2.0E+02 3.7E-03
CHLOROMETHANE V G 50 4.3E+03 8.8E-03
CHLOROPHENOL, 2- V L 129 2.5E+00 1.1E-05
DIBROMOCHLOROMETHANE V S 208 5.5E+00 7.8E-04
DIBROMOETHANE, 1,2- V S 188 1.1E+01 6.6E-04
DICHLOROBENZENE, 1,2- V L 147 1.4E+00 1.9E-03
DICHLOROBENZENE, 1,3- V L 147 2.2E+00 1.9E-03
DICHLOROBENZENE, 1,4- V S 147 1.7E+00 2.4E-03
DICHLOROETHANE, 1,1- V L 99 2.3E+02 5.6E-03
DICHLOROETHANE, 1,2- V L 99 7.9E+01 1.2E-03
DICHLOROETHYLENE, 1,1- V L 97 6.0E+02 2.7E-02
DICHLOROETHYLENE, Cis 1,2- V L 97 2.0E+02 4.1E-03
DICHLOROETHYLENE, Trans 1,2- V L 97 3.3E+02 9.3E-03
DICHLOROPROPANE, 1,2- V L 113 5.3E+01 2.9E-03
DICHLOROPROPENE, 1,3- V L 111 3.4E+01 3.7E-03
DIOXANE, 1,4- V L 88 3.8E+01 4.9E-06
ETHANOL V L 46 5.9E+01 6.3E-06
ETHYLBENZENE V L 106 9.6E+00 7.8E-03
METHYL ETHYL KETONE V L 72 9.1E+01 5.6E-05
METHYL ISOBUTYL KETONE V L 100 2.0E+01 1.4E-04
METHYL TERT BUTYL ETHER V L 88 2.5E+02 5.9E-04
METHYLENE CHLORIDE V L 85 4.4E+02 3.2E-03
STYRENE V L 104 6.4E+00 2.7E-03
tert-BUTYL ALCOHOL V L 74 4.1E+01 1.2E-05
TETRACHLOROETHANE, 1,1,1,2- V L 168 4.6E+00 2.4E-03
TETRACHLOROETHANE, 1,1,2,2- V L 168 4.6E+00 3.7E-04
TETRACHLOROETHYLENE V L 166 1.9E+01 1.8E-02
TOLUENE V L 92 2.8E+01 6.6E-03
TPH (gasolines) V L 108 6.8E+02 7.2E-04
TRICHLOROETHANE, 1,1,1- V L 133 1.2E+02 1.7E-02
TRICHLOROETHANE, 1,1,2- V L 133 2.3E+01 8.3E-04
TRICHLOROETHYLENE V L 131 6.9E+01 9.8E-03
TRICHLOROPROPANE, 1,2,3- V L 147 3.7E+00 3.4E-04
TRICHLOROPROPENE, 1,2,3- V L 145 3.7E+00 2.8E-02
VINYL CHLORIDE V G 63 3.0E+03 2.7E-02
XYLENES V L 106 8.0E+00 7.1E-03

Reference: Appendix 1, Table H in HEER Office Environmental Hazard Evaluation guidance (HDOH, 2016).

  1. Physical state of chemical at ambient conditions (V – volatile, SV – Semi-Volatile (*SV – Treated as “volatile” in USEPA risk assessment models if H > 0.00001), S – solid, L – liquid, G – gas).
  2. Vapor Pressures from National Library of Medicine TOXNET or ChemID databases.
  3. Check with lab to determine feasibility of wet sieving sample to remove >2mm particles prior to subsampling.
  4. Soil or sediment samples that consist entirely of <2mm material do not require drying and sieving to address fundamental error concerns, although some degree of drying and sieving may be desirable by the laboratory for testing purposes.