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Composting Regulations- Title 14 CCR, Divsion 7, Chapter 3.1 Page 5 of 11 <br /> Table 1 <br /> Frequencies of Compost Sampling for Biosolids Composting Facilities <br /> Amount of Biosolids Compost Feedstock Frequency <br /> (metric tons per 365 day period) <br /> Greater than zero but annually fewer than 290 annually <br /> Equal to or greater than 290 but fewer than 1,500 quarterly <br /> Equal to or greater than 1,500 but fewer than 15,000 bimonthly <br /> Equal to or greater than 15,000 monthly <br /> (A) The amount of biosolids compost feedstock shall be calculated in dry weight <br /> metric tons. <br /> (3) Composite sample analysis for maximum acceptable metal concentrations, specified in <br /> section 17868.2, shall be conducted at a laboratory certified by the California Department of <br /> Health Services, pursuant to the Health and Safety Code. <br /> (b) A composite sample shall be representative and random, and may be obtained by taking twelve (12) <br /> mixed samples as described below. <br /> (1) The twelve samples shall be of equal volume. <br /> (2) The twelve samples shall be extracted from within the compost pile as follows: <br /> (A) Four samples from one-half the width of the pile, each at a different cross- <br /> section; <br /> (B) Four samples from one-fourth the width of the pile, each at a different cross- <br /> section; and, <br /> (C) Four samples from one-eighth the width of the pile, each at a different cross- <br /> section. <br /> (c) The EA may approve alternative methods of sampling for a green material composting operation or facility <br /> that ensures the maximum metal concentration requirements of section 17868.2 and the pathogen reduction <br /> requirements of section 17868.3 are met. <br /> Note: <br /> http://www.ciwmb.ca.gov/Regulations/Title 14/ch31 a5.htm 3/23/2006 <br />