excluding any non-soil surface treatment such as asphalt, concrete or aggregate; "soil" means, for the purposes of the definition of shallow soil property, unconsolidated naturally occurring mineral particles and other naturally occurring material resulting from the natural breakdown of rock or organic matter by physical, chemical or biological processes that are smaller than 2 millimetres in size or that pass the US #10 sieve, and includes a mixture of soil and rock if less than 50 per cent by mass of the mixture is rock. O. Reg. 511/09, s. 21. (2)  A site specific risk assessment of a property as referred to in the Cleanup Guideline 1996 that was commenced, but not completed, before this Regulation came into force satisfies the requirements of this Regulation if, (a) in an appendix to the risk assessment report prepared and submitted in accordance with Schedule C, a qualified person certifies in writing that the components of the site specific risk assessment completed before this Regulation came into force meet the requirements of this Regulation with respect to a risk assessment, except that they were not completed by a qualified person; and (b) a risk assessment is completed that consists of, (i) a review by a qualified person of those components of the site specific risk assessment completed before this Regulation came into force, and (ii) the completion of those components required under Schedule C that were not completed at the time this Regulation came into force. O. Reg. 153/04, s. 44 (2). (3)