2008-12-17_HYDROLOGY - M2004078 (6)

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Lupton Lakes Gravel Mine - Ft. Lupton Colorado 2008 Water Quality Monitoring Groundwater quality monitoring as required by the Division of Minerals and Geology Permit #M-2004-078 limits b y 2007 Proposed CRMW40 Parameters Units CDPHW'2 Baseline Levels Jan-08 Apr-08 Jul-08 Oct-08 Methyl-t-butyl ether ug/L - N Benzene ug/L 5 ---- Toluene l,gn. 1,000 ---- --- ---- u Ethylbenzene Ng/L 700 0 m,p-Xylene Ng/L ,400 to 10. o-Xylene Ng/L ,400 to 10, 1 ---- -~ -- ' -- °- Xylene (Total) pg/L .400 to 10,0 ---- - ""- - --"' Aldrin pg/L -~- a-BHC pg/L - -- b-BHC Ng/L ___ ---- --- -- -- --- d-BHC Ng/L _ _ _- g-BHC Ng/LL __ _ ---- -- - -- --- -- Chlordane (Technical) pg/L -- --- -' "~' C-4 n a-Chlordane pg/L 0.10 to 2 ---- '- "'- '-" V C g-Chlordane Ng/L 0.15 --- -- -- - -- - o. 4,4'-DDD pg/L 0.1 -"- '-' "" - `- v 4,4'-DDE pg/L 0.1 ---- -- ---- --- --- m c 4,4'-DDT Ng/L 0.002 ---- -'- "-- - " - o Dieldrin pg/L 42 U Endosulfan I pg/L 42 5 Endosulfan II pg/L 42 ---- 0 O Endosulfan sulfate pg/L 2 ---- Endrin pg/L 2.1 ---- ---- ---- -- `- Endrin aldehyde pg/L 0.008 to 0.4 ---- Endrin ketone pg/L 0.004 to 0.2 ---- -- -- - -- -- Heptachlor Ng/L 35 to 40 ---- ---- Heptachlor epoxide Ng/L 0.032 to 3 ---- --- -- - Methoxychlor Ng/L 35 to 40 --- -- -- -' ~- Toxaphene Ng/L 0.032 to 3 -- -- -- - - Seconda ry Drinking Water Standa rds - Sug gested Lim its by CDPHE. The secondary maximum 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