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~ ~ III IIIIIIIIIIIII III <br />July 7, 1992 <br />Colorado Mined Land Reclamation 3oard <br />1313 Sherman St., Room 215 <br />Denver, CO 80203 <br />Attn Mr. Berhan Keffelew <br />Dear Mr. Y.e'`r•!ew <br />I^, response to yo~.~ c;uest.o^ ..;cut chr~me~-'oe~r~a~ kiln b•~_c'< <br />in our !:iln dust lendfill., hav.^ ?ound Lha io_::owinc <br />1. Ch•nme b.~ariny kiln brick i_ ro '.on~er b::Ln~. used ct the <br />Fort Co~.lins plant. <br />_ The last ch-ome-bearinc; k:. '_^. brick wzs removed from Lhe <br />hil~ in 1991. <br />3. ~'hilc I 'gave not been able to i^d documentary evide::co <br />fior it, odd employers staled to m< that the 3oeticher <br />plant has hzd the policy of crushing the _scd b•ic!c end <br />roturning it to the process since :977. Certainly, i.hat <br />policy has been company-wide since 1980 <br />.any chrome-bearing brick which may have been disczrded <br />i nt o t he dust. ' ~ ndf i ! '_ prior '~c '_ ^.77 Chou 1 :! ~~ot `_~: a <br />problem to the groundwater The enclosing formations are <br />virtually impsrmeable, with pcrmeabi'_iti:s of less tFan <br />.01 millidarcies, as measured by H.. nn and Caraway for <br />CSU geology graduate tholes on the Niobrara and Code'.: <br />formations. <br />If you have any comments o- pucstions, pleas.; ~,~11 <br />Verity truly your <br />~"`~`-C <br />Paul E. Thomsen <br />plant Engineer, Fort Collins plant <br />Holnam Inc <br />• <br />