Ground water California

CohenDB. 1986. Ground water contamination by toxic substances, California Assessment. Pollutant Investigations Branch, State Water Resources Control Board, Sacramento, CA American Chemical Society. 

Jackson, R. E., 1999, Anticipating Ground-Water Contamination by New Technologies and Chemicals The Case of Chlorinated Solvents in California Environmental Engineering Geoscience, Fall, Vol. V, No. 3, pp. 331-338. 

The workshop was co-chaired by Dr. Luis Marin, Professor of Geology at the Universidad Nacional Autonoma de Mexico (UNAM— National Autonomous University of Mexico) and Dr. Henry Vaux, Professor of Resource Economics and Associate Vice President Emeritus of the University of California, Berkeley. The workshop addressed science-based decision making in a regional (Yucatan peninsula) and topical (sustainable ground water management) context. 

Petty, J.D. Huckins, J.N. Cranor, W.L. Qark, R.C. 1998b, Determination ofDieldrin in Ground Water from the George Air Eorce Base California. USGS Columbia Environmental Research Center Columbia, MO Unpubhshed report to U.S. EPA, San Francisco CA. 

DBCP has been found In ground water In Hawaii, California, Arizona, South Carolina, and Maryland (5-7,19,77-79). Typical positives are 0.02-20 ppb. Areas with the highest frequency of positives and the highest well concentrations are the San Joaquin Valley In California and the region southwest of Phoenix, Arizona. The Hawaii contamination has occurred despite several hundred feet of overburden between the basal aquifer and the surface. One set of California soil core results show that ppb amounts of DBCP has leached about 15 m through the unsaturated zone ( ), whereas DBCP was not detected In another set of California soil cores sampled as deep as 10 m and five years after the last application (80). The latter results can possibly be explained by rapid movement of DBCP down the soil profile to depths greater than 10 m. 

DCP has been found In ground water In about 3 Maryland wells (7 ), about 30 Long Island, New York wells (37), and over 60 California wells (89) at levels typically ranging between 1 ppb and 50 ppb. Soil core data from California showed that DCP was detected as far as 7 m down at 0.2-2,2 ppb (89). 

In a recent California study, designed for even spatial distribution, slmazlne was found In 6 wells out of 166 sampled at levels between 0.5 ppb and 3.5 ppb (99). In a different part of the same study, slmazlne was found throughout the soil profile down to ground water which was encountered at about 9 m (80). The estimate made was that 8.2% of the slmazlne applied over an 11 year period remained In the soil column above the aquifer. 

Weaver, D.J. Sava, R.J. Zalkln, F. Oshlma, R.J. "Pesticide Movement to Ground Water, Volume I Survey of Ground Water Basins for DBCP, EDB, Slmazlne and Carbo-furan," California Department of Food and Agriculture, 1983, Sacramento, California 95814. 

Oliveira DP, Sitar N. 1985. Ground water contamination from underground solvent storage tanks, Santa Clara, California. In Proceedings of the Fifth National Symposium on Aquifer Restoration and Ground Water Monitoring, 691- 708. 

At the Sierra Army Depot in Herlong, California, groundwater had been contaminated by trinitrotoluene (TNT) and trichloroethylene (TCE). The 28-acre plume of contaminated ground-water was located about 70 ft underground. The U.S. Army evaluated the cost difference between conventional pump-and-treat systems, ultraviolet (UV) oxidation, granular activated carbon (GAC) filters, and MNA. The active treatments were estimated to cost between 6 and 10 million while MNA costs were estimated to be approximately 1 million (D17451Q). 

In a groundwater contamination study of 28 of California s 58 counties that evaluated over 50 pesticides (from both point and nonpoint sources), diazinon was detected in 12 samples (Cohen 1986). Diazinon is included as an analyte of interest in the EPA Pesticides in Ground Water Database (EPA 1989a) and was... 

Fujii, R. and Swain, W.C. (1995) Areal Distribution of Selected Trace Elements, Salinity, and Major Ions in Shallow Ground Water, Tulare Basin, Southern San Joaquin Valley, California. U.S. Geological Survey Water Resources Investigation Report 95-4048, USGS, Sacramento, CA. 

Ball, J.W. and Izbicki, J.A. (2003) Geochemical relations among arsenic, chromium, and other trace elements in ground water underlying the Sheep Creek fan, western Mojave Desert, California. Abstracts with Programs-Geological Society of America, 35(6), 565. 

Levy, D.B., Schramke, J.A., Esposito, K.J. et al. (1997) Geochemistry of Arsenic and Fluorine in Shallow Ground Water Eastern Owens Lake, California. 4th International Symposium on Environmental Geochemistry Proceedings, Vail, Colorado, USA. U.S. Geological Survey Open-File Report, No. 97-0496, p. 53. 

Welch, A.H., Lawrence, S.J., Lico, M.S. et al. (1997) Ground-Water Quality Assessment of the Carson River Basin, Nevada and California Results of Investigations, U.S. Geological Survey Water-Supply Paper, p. 931 sheet. 

Dickinson JE, Land M, Faunt CC, Leake SA, Reichard EG, Fleming JB Pool DR (2006) Hydrogeologic Framework Refinement, Ground-Water Flow and Storage, Water Chemistry Analyses, and Water-Budget Components of the Yuma Area, Southwestern Arizona and Southeastern California. USGS Scientific Investigations Report 2006-5135... 

Hadley P. W. and Armstrong R. (1991) Where s the benzene —Examining California groundwater quality surveys. Ground Water 29, 35 -40. 

Izbicki J. A. (1991) Chloride sources in a California coastal aquifer. In Ground Water in the Pacific Rim Countries. Conference Proceedings, Irrigation Division, American Society of Consulting Engineers, Honolulu, Hi, July 23-35, 1991. 

Welch, A. H., 1994, Ground-water quality and geochemistry in Carson and Eagle Valleys, western Nevada and eastern California U.S. Geological Survey, 93-33, 99 p. 

Hadley PW, Armstrong R. 1991. "Where s the benzene " Examining California (USA) ground-water quality surveys. Ground Water 29(1) 35-40. 

Table I. The seven pesticides for which residues have been found in ground water in California as a result of legal agricultural use, as of September, 1989...

Table II. Pesticides being assessed for immunochemical assay of soil and ground water samples by the California Department of Food and Agriculture First Priority...

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