Accession Number : ADA162920
Title : Installation Restoration Program. Phase II. Confirmation/Quantification Stage 1 for Nellis Air Force Base, Nevada.
Descriptive Note : Final rept. Oct 83-Aug 85.
Corporate Author : DAMES AND MOORE PARK RIDGE IL
Report Date : 09 Aug 1985
Pagination or Media Count : 434
Abstract : The field evaluation investigated 5 sites through drilling and sampling 12 new borings and sampling 5 preexisting base wells. Two ground water systems exist beneath the base. The shallow ground water system comprises approximately the upper 200 feet of valley sediments. It is maintained by upward leakage from a deeper artesian aquifer and recharged by septic tank effluent, irrigation waters, and wastewater treatment plant effluent. Precipitation is an insignificant source of recharge. The deeper artesian ground water system consists of more permeable sediments at depths greater than about 200 feet. It is the principal source of ground water for the base and the Las Vegas Valley. Of 44 parameters analyzed in ground water, only 6 were present in one or more samples above detection limits. The detected parameters included two halocarbons (1,1,1-trichloroethane and toluene), two pesticides (aldrin and DDT isomers), nitrate, and phenol. Nitrate concentration in one monitoring well sample exceeded primary drinking water standards.
Descriptors : *GROUND WATER , *WASTE DISPOSAL , *CONTAMINATION , SOURCES , DETECTION , WASTE WATER , MONITORING , WATER , FIELD TESTS , DEPTH , ISOMERS , SHALLOW WATER , DRINKING WATER , WATER TREATMENT , PRECIPITATION , LIMITATIONS , STANDARDS , AIR FORCE FACILITIES , EFFLUENTS , HALOGENATED HYDROCARBONS , SEDIMENTS , VALLEYS , PHENOLS , WATER WELLS , WATER SUPPLIES , PESTICIDES , IRRIGATION SYSTEMS , ALDRIN , NEVADA , TOLUENES , SEPTIC TANKS , DDT
Subject Categories : Water Pollution and Control
Distribution Statement : APPROVED FOR PUBLIC RELEASE