2008-12-17_HYDROLOGY - M2004078 (6)

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Lupton Lakes Gravel Mine - Ft. Lupton Colorado 2008 Water Quality Monitoring Groundwater nuality monitoring as required by the Division of Minerals and Geoloav Permit #M-2004-078 limits b Y y 2007 Proposed Parameters Units CDPHE''2 Baseline Levels Jan-08 Apr-08 Jul-08 Oct-08 Methyl-t-butyl ether Ng/L ----- -- ---- U ---- U Benzene pg/L 5 ---- --- U -- U Toluene pg/L 1,000 ---- - - U --" U Ethylbenzene Ngn. 700 ---- - -- u -- u 0 m,p-Xylene pg/L 400 to 10, -°- ""- -- "' u o-Xylene pg/L ,400 to 10, --- - - - U Xylene (Total) Ng/L ,400 to 10, ---- -- U -- u Aldrin Ng/L ---- -- -- U -- U a-BHC Ng/L - - - ---- --- U -- U b-BHC pg/L U --- u d-BHC Ng/L U -- U g-BHC Ng/L U ---- u Chlordane (Technical) pg/L ---- --- U --- U a a-Chlordane pg/L 0.10 to 2 ---- --- u '- U V g-Chlordane pg/L 0.15 ---- -- U -- U E 4,4'-DDD pg/L 0.1 ---- U U 4,4'-DDE pg/L 0.1 ---- ---- U -- U V 4,4'-DDT pg/L 0.002 ---- ---- U --- u `o Dieldrin pg/L 42 ---- --- U -_- U Endosulfan I pg/L 42 ---- -- U '- U o I Endosulfan II pg/L 42 ---- -- U ---- U m 0 Endosulfan sulfate pg/L 2 ---- '- " U ' "- U Endrin Ng/L 2.1 ---- --- U ---- U Endrin aldehyde pg/L 0.008 to 0.4 --- ---- U - U Endrin ketone pg/L 0.004 to 0.2 ---- -- u ---- U Heptachlor pg/L 35 to 40 ---- -"' U U Heptachlor epoxide pg/L 0.032 to 3 -- -- U - U Methoxychlor pg/L 35 to 40 -- - -- U -- U Toxaphene pg/L 0.032 to 3 -- --- U -- U Seconaary unnKing water otanaaros - auggesteo Lf?rnts Uy ?..vrnM. 1110 SGGIJ11UQiy 111GAO11U11 contaminant levels are not enforceable, but are intended as guidelines. 1 Colorado Department of Public Health and Environment (CDPHE) maximum contaminant level (MCL) for Drinking Water 2 Colorado Department of Public Health and Environment (CDPHE) standards for groundwater 3 Dissolved Metals during the Nov. and Dec. 2005 Sampling Events. *Laboratory results shown in RED HIGHLIGHT exceed MCL or suggested limits