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<br />Table l.--Chemiaa~ CO'la~yses of ground-water samples <br /> <br />o <br />c.o <br />N <br />.... <br /> <br />[The mandatory and recommended limits for drinking water of the Colorado Department of Health (1971) <br />and the U.S. Public Health Service (1962) are listed for each constituent immediately below the <br />column headings. For most ground-water samples, concentrations of dissolved and total constitu- <br />ents are virtually equal. Therefore, the same limits are used for total arsenic and selenium as <br />are used for dissolved arsenic and selenium. NONE indicates that no limit has been established. <br />MG/L = milligrams per liter; UG/L = micrograms per liter; ND = not detectable] <br /> <br />GEOLOGIC UNIT CODE <br /> <br />GEOLOGIC UNIT AND AGE <br /> <br />..., <br /> <br />lllALFP ] <br />lllFLDP <br />lllVLFL <br />lllAVMT <br />124SNJS <br />125ANMS <br />125KRLD <br />211CLFH <br />211 FRLD <br />211LWIS <br />211MENF <br />211MNCS <br />211MVRD <br />211PCCF <br /> <br />Alluvium, Holocene <br /> <br />Terrace deposits, Holocene <br /> <br /> <br />San Jose Formation, Eocene <br /> <br /> <br />Animas Formation, Paleocene and Cretaceous <br /> <br />Kirtland Shale, Paleocene and Cretaceous <br /> <br /> <br />Cliff House Sandstone, Cretaceous <br /> <br />Fruitland Formation, Cretaceous <br /> <br />Lewis Shale, Cretaceous <br /> <br /> <br />Menefee Formation, Cretaceous <br /> <br /> <br />Mancos Shale, Cretaceous <br /> <br /> <br />Mesaverde Group, Cretaceous <br /> <br />Pictured Cliffs Sandstone, Cretaceous <br />