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1r <br />ASPHALT <br />SPECIALTIES CO. <br />10100 Dallas St. Henderson, CO 80640 (303) 289-8555 Fax: (303) 289-7707 <br />October 1, 2009 <br />Ms. Shannon McDowell <br />Adams County Dept. of Planning and Development <br />Western Service Center <br />12200 Pecos St. <br />Westminster, CO 80204 <br />RE: Submittal of Soil Sampling Testing Results for Additional Information, Operations <br />and Closure Plan for Speer Inert Landfill, Adams County, Colorado <br />Dear Shannon: <br />Enclosed are the lab results of the testing of all 9 drilled composite samples from the <br />locations and depths approved by Craig Tessmer on September 11, 2009 at the Speer pit. <br />Craig witnessed most of the drilling and sampling procedures, and viewed the field <br />samples prior to them being delivered to the lab for testing that day. <br />Summit Scientific did the testing, and oversaw the testing for metals, with approved EPA <br />procedures. As you will, note, all samples tested for VOC's, total petroleum <br />hydrocarbons, and pesticides showed results of "Non-Detect", even using the CDPHE <br />stringent "Residential Limitations" for soil samples. <br />Five of the eight RCRA metals tested on all samples did show concentrations, but only <br />Arsenic was slightly above the CDHPE limitation. All the other four metals showed <br />results way below limitations. As an aid to your review of these results, I took the 9 pages <br />showing the metals testing results and copied them and added the CDHPE limitation next <br />to them. I also took the Colorado Soil Evaluation Value Table from the CDHPE, as well <br />as a footnote that goes with the table (10,c), and enlarged them for your use. The <br />complete table follows that information. This information is stapled as an extra <br />document. <br />In reviewing the Arsenic concentrations next to the CDHPE limitation, you will note that <br />the results are only slightly above the limitation. You will also note in reading the <br />footnote from the CDHPE, that Arsenic concentrations in many areas of Colorado are <br />naturally occurring and naturally exceed the limitation. That is the case with these <br />samples. <br />I t is obvious in reviewing all the metals concentrations together (let alone all four suites <br />of testing) including Arsenic, that the soils tested in the Speer pit contain no hazardous