Document ID: chunk:federal_register_of_legislation:F2013C00288:reg:6:p3
Version: federal_register_of_legislation:F2013C00288
Segment Type: reg
Provision Reference: reg 6 (pt 3/10)
Character Range: 181912–186811

levels for volatile organic chlorinated compounds
Chemical                Interim soil vapour HIL  (mg/m3)
Residential1 A          Residential1 B                    Recreational1 C  Commercial / Industrial1 D
TCE                     0.02                              0.02             0.4                         0.08
1,1,1-TCA               60                                60               1200                        230
PCE                     2                                 2                40                          8
cis-1,2-dichloroethene  0.08                              0.08             2                           0.3
Vinyl chloride          0.03                              0.03             0.5                         0.1

Notes:
   1. Land use settings are equivalent to those described in Table 1A(1) Footnote 1 and Schedule B7, though secondary school buildings should be assessed using residential 'A/B' for vapour intrusion purposes.
   2. Interim HILs for VOCCs are conservative soil vapour concentrations that can be adopted for the purpose of screening sites where further investigation is required on a site-specific basis. They are based on the potential for vapour intrusion using an indoor air-to-soil vapour attenuation factor of 0.1 and an outdoor air-to-soil vapour attenuation factor of 0.05.
   3. Application of the interim HILs is based on a measurement of shallow (to 1 m depth) soil vapour (or deeper where the values are to be applied to a future building with a basement) or sub-slab soil vapour.
   4. The applicability of the interim HILs needs to be further considered when used for other building types such as homes with a crawl-space and no slab, which may require site-specific assessment.
   5. Use of the interim HILs requires comparison with data that has been collected using appropriate methods and meets appropriate data quality requirements.
   6. Oral and dermal exposure should be considered on a site-specific basis where direct contact exposure is likely to occur.

Table  1A(3) Soil HSLs for vapour intrusion (mg/kg)
              HSL A & HSL B                   HSL C                      HSL D
              Low – high density residential  recreational / open space  Commercial / Industrial
CHEMICAL                                                                                                                                                                                                                                 Soil saturation concentration
                                                                                                                                                                                                                                         (Csat)
              0 m to <1 m                     1 m to <2 m                2 m to <4m               4 m+       0 m to <1 m  1 m to <2 m  2 m to <4 m  4 m+       0 m to <1 m       1 m to <2 m        2 m to <4 m        4 m+
SAND
Toluene       160                             220                        310                      540        NL           NL           NL           NL         NL                NL                 NL                 NL                560
Ethylbenzene  55                              NL                         NL                       NL         NL           NL           NL           NL         NL                NL                 NL                 NL                64
Xylenes       40                              60                         95                       170        NL           NL           NL           NL         230               NL                 NL                 NL                300
Naphthalene   3                               NL                         NL                       NL         NL           NL           NL           NL         NL                NL                 NL                 NL                9
Benzene       0.5                             0.5                        0.5                      0.5        NL           NL           NL           NL         3                 3                  3                  3                 360

F1(9)         45                              70                         110                      200        NL           NL           NL           NL                      260               370                630                NL   950
F2(10)        110                             240                        440                      NL         NL           NL           NL           NL         NL                NL                 NL                 NL                560
SILT
Toluene       390                             NL                         NL                       NL         NL           NL           NL           NL         NL                NL                 NL                 NL                640
Ethylbenzene  NL