2008-12-17_HYDROLOGY - M2004078 (6)

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Lupton Lakes Gravel Mine - Ft. Lupton Colorado 2008 Water Quality Monitoring Groundwater duality monitoring as reauired by the Division of Minerals and Geoloav Permit OM-2004-078 limits b Y 2007 Proposed CRMWO9 Parameters Units CDPHE' 2 Baseline Levels Jan-08 Apr-08 Jul-08 Oct-08 Methyl-t-butyl ether Ng/L - - --- - --- -- --- ?O N Benzene pg/L 5 ---- - -- -'-- - - Toluene Ng/L 1,000 to Ethylbenzene pg/L 700 ---- --- --- --- -- O O m,p-Xylene pg/L ,400 to 10,00 -- - - - -- -- --- o-Xylene Ng/L .400 to 10, ---- -- -- -- --- Xylene (Total) pg/L 1,400 to 10,0 Aldrin Ng/L --- a-BHC Ng/L --- ---- ---- - -- -- b-BHC pg/L ---- --- - -- ---- d-BHC i,g/L _- g-BHC Ng/l --- Chlordane (Technical) Ng/L --- H a-Chlordane pg/L 0.10 to 2 ---- -- -"- ---- -•'- e 3 g-Chlordane Ng/L 0.15 ---- -- ---- -- --" cL 4,4'-DDD pg/L 0.1 --- -- -- -" -" V 4,4'-DDE Ng/L 0.1 m c 4,4'-DDT Ng/L 0.002 ---- -"° '--- ---" "-- ?o Dieldrin pg/L 42 ---- - --- ""-- "--- o Endosulfan I pg/L 42 ---- -- --" --- - 1 Endosulfan II pg/L 42 --- ---- -- -- --- p Endosulfan sulfate pg/L 2 ---- --- -- """- """" Endrin pg/L 2.1 -- - " - -"- -"-- Endrin aldehyde Ng/L 0.008 to 0.4 ---- Endrin ketone Ng/L 0.004 to 0.2 Heptachlor pg/L 35 to 40 Heptachlor epoxide pg/L 0.032 to 3 ---- - --- ---- --- Methoxychlor pg/L 35 to 40 ---- ---- -• - --- -- Toxaphene pg/L 0.032 to 3 -_. 5econaary unniung vvater 5tanaaras - suggestea Limits Dy Uurrit. i ne seconaary maximum contaminant levels are not enforceable, but are intended as guidelines. 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