Document ID: chunk:federal_register_of_legislation:F2013C00288:reg:5:p5
Version: federal_register_of_legislation:F2013C00288
Segment Type: reg
Provision Reference: reg 5 (pt 5/5)
Character Range: 1609860–1611396

guidelines
A compilation of SQGs for naphthalene in a number of jurisdictions is presented in Table 41. These SQGs have a variety of purposes and levels of protection and therefore comparison of the values is problematic. The SQGs for naphthalene range from 0.6 mg/kg for Canada to 125 mg/kg for the USA, both expressed as total naphthalene. The original NEPM (NEPC 1999) did not include an EIL for naphthalene. The SQG(NOEC & EC10) for areas of ecological significance freshly contaminated with naphthalene is 5 mg/kg and thus is identical to the lower range of values set within the EU, but approximately an order of magnitude higher than the Canadian SQG and 1/25th of the USA SQG. The  SQG(NOEC & EC10) for urban residential/public open space is 70 mg/kg and thus slightly higher than the highest EU SQGs but still approximately half the US EPA screening level for residential land. The SQG(LOEC & EC30) for urban residential land use at 170 is 40% larger than the US EPA screening level, while the corresponding SQG(EC50) value is 2.8 times the US EPA screening level.

Table 41. Soil quality guidelines for naphthalene in a number of jurisdictions.
Name of the naphthalene soil quality guideline  Value of the guidelines (mg/kg)
Canadian SQG (residential)1                     0.6
EU (residential)2                               560
US EPA Screening level (residential)3           125

1 = CCME 1999c , 2006 and <http://www.ccme.ca/publications/list_publications.html#link2>
2 = Carlon 2007
3 = http://www.epa.gov/ecotox/ecossl/.