Document ID: chunk:federal_register_of_legislation:F2013C00288:reg:5:p4
Version: federal_register_of_legislation:F2013C00288
Segment Type: reg
Provision Reference: reg 5 (pt 4/10)
Character Range: 1449458–1452967

or median effects method was used to obtain SQGs. SSD was the preferred methodology if sufficient data was available. The output from the SSD might be divided by an uncertainty factor, depending on the type and amount of toxicity data used in the SSD. For the agricultural and residential/parkland land uses, the SQGs derived using an SSD (IC25 and/or EC25 data) are set to protect 75% of species and soil processes while, for commercial and industry land uses, 50% of the species are protected. A full description of the methodology can be found online at www.ccme.ca/assets/pdf/sg_protocol_1332_e.pdf.

If sufficient toxicity data is available, the SQGs distinguish between two generic soil types: coarse-textured soils (soils containing predominantly sand and gravel) and fine-textured soils (soils containing predominantly silt and clay). This separation has been made as contaminant fate, transport and bioavailability are dependent to varying degrees on soil texture, moisture content and other factors. Separation of the two soil types can thereby minimise the uncertainty in guideline derivation introduced by soil variability.

Thirty-two SQGs have been produced using the 1999 or 2006 derivation protocol, and 34 interim remediation criteria in soils remain (established in 1991) that have not yet been replaced by the SQG protocol. A complete list of SSQs and interim remediation criteria can be viewed at www.documents.ccme.ca.

The SQGs include: arsenic (inorganic), barium, benzene, benzo(a)pyrene, cadmium, chromium (total and Cr VI), copper, cyanide (free), DDT (total), di-isopropanolamine, ethylbenzene, ethylene glycol, lead, mercury (inorganic), naphthalene, nickel, nonylphenol (and its ethyloxylates), pentachlorophenol, phenol, PCBs, polychlorinated dibenzo-p-dioxins/dibenzofurans (PCDD/Fs), propylene glycol, selenium sulfolane, tetrachloroethylene, thallium, toluene, trichloroethylene, uranium, vanadium, xylenes, and zinc.

The interim remediation criteria include: conductivity, pH, sodium adsorption ratio, antimony, beryllium, boron (hot water soluble), cobalt, fluoride (total), molybdenum, silver, sulfur (elemental), tin, chlorobenzene, 1,2-dichlorobenzene, 1,3-dichlorobenzene, 1,4-dichlorobenzene, styrene, chlorophenols, nonchlorinated phenolic compounds, benzo(a)anthtracene, benzo(b)fluoranthene, benzo(k)fluoranthene, dibenz(a,h)anthracene, indeno(1,2,3-c,d)pyrene, phenanthrene, pyrene, chlorinated aliphatics, chlorobenzenes, hexachlorobenzene, hexachlorocyclohexane, nonchlorinated aliphatics, phthalic acid esters, quinoline, and thiophene.

5.1.4         A4:  EU and UK
European Union Regulation 1488/94 and Directive 98/8 require that an environmental risk assessment be carried out on notified new substances, on priority existing substances and active substances and substances of concern in a biocidal product. Neither the regulation nor directive provides soil guideline values, but a technical guidance document (TGD) on ERA (ECB 2003) and soil guideline derivation was published as part of EU Directive 93/67 and is available online at
ecb.jrc.it/Documents/TECHNICAL_GUIDANCE_DOCUMENT/EDITION_2/tgdpart2_2ed.pdf.

Several member states, including the UK, have adopted the methodology for deriving their national SQGs given in the technical guidance document (ECB 2003). Eventually, all EU member states will develop SQGs and use the method recommended in the TGD (ECB 2003).

In the UK, soil guideline values (SGVs) represent 'intervention values' which, if