Data Series 285
U.S. GEOLOGICAL SURVEY
Data Series 285 (ver 1.1, August 2018)
| CAS | Chemical Abstracts Service (American Chemical Society) |
| CFC-12 | dichlorodifluoromethane |
| CSU | combined standard uncertainty |
| DBCP | 1,2-dibromo-3-chloropropane |
| DD | depth dependent |
| DO | dissolved oxygen |
| DOC | dissolved organic carbon |
| FP | flowpath |
| GAMA | Ground-Water Ambient Monitoring and Assessment (State Water Board) |
| GC/MS | gas chromatography/mass spectrometry |
| GIS | geographic information system |
| HA-L | lifetime health advisory (USEPA) |
| ICP-MS | inductively coupled plasma mass spectrometry |
| ID | identification |
| LRL | laboratory reporting level |
| LT-MDL | long-term method detection level |
| MCL | Maximum Contaminant Level (CADHS and USEPA) |
| MDL | method detection limit |
| MRL | Minimum Reporting Level |
| MU | method uncertainty |
| NAM | North American (study area) |
| NAWQA | National Water Quality Assessment (USGS) |
| NDMA | N-Nitrosodimethylamine |
| NL | notification level (CADHS) |
| NRP | National Research Program (USGS) |
| NWIS | National Water Information System (USGS) |
| PCE | tetrachloroethylene |
| QC | quality control |
| QPC | Uplands (Quaternary Pleistocene semiconsolidated deposits; study area) |
| RSD | relative standard deviation |
| RSD5 | risk-specific dose at a cancer risk level of 1 in 100,000 or 10E–5 (USEPA) |
| SAM | South American (study area) |
| SC | specific conductance |
| SMCL | Secondary Maximum Contaminant Level (CA and USEPA) |
| SOL | Solano (study area) |
| SSMDC | sample-specific minimum detectable concentration |
| SUI | Suisun–Fairfield (study area) |
| TCE | trichloroethylene |
| 1,2,3-TCP | 1,2,3-trichloropropane |
| TDS | total dissolved solids |
| THM | trihalomethane |
| TIOC | tentatively identified organic compound |
| UV-VIS | ultraviolet-visible |
| VOC | volatile organic compound |
| YOL | Yolo (study area) |
| Organizations | |
| CADHS | California Department of Health Services (as of July 1, 2007, name changed to California Department of Public Health) |
| CADWR | California Department of Water Resources |
| CWSC | California Water Science Center (USGS) |
| LLNL | Lawrence Livermore National Laboratory |
| NIST | National Institute of Standards and Technology |
| NWQL | National Water Quality Laboratory (USGS) |
| RSIL | Reston Stable Isotope Laboratory (USGS) |
| USEPA | U.S. Environmental Protection Agency |
| USGS | U.S. Geological Survey |
| Units of Measurement | |
| ft | foot (feet) |
| in. | inch |
| kg | kilogram (103 grams) |
| km2 | square kilometer |
| lb | pound |
| L | liter |
| mg | milligram (10–3 gram) |
| mg/L | milligram per liter (10–3 grams per liter) |
| mi2 | square miles |
| mL | milliliter (10–3 liter) |
| µg/L | microgram per liter (10–6 grams per liter) |
| µL | microliter (10–6 liter) |
| µm | micrometer (10–6 meter) |
| pCi/L | picocurie per liter |
| pCi/µg | picocurie per microgram |
Note: In this report, the California State Water Resources Control Board is referred to in its abbreviated form as the “State Water Board.” The initialism “SWB” is not used in the text.
Temperature in degrees Celsius (°C) may be converted to degrees Fahrenheit (°F) as follows:
°F = (1.8 × °C) + 32
Vertical coordinate information is referenced to the North American Vertical Datum of 1988 (NAVD 88).
Horizontal coordinate information is referenced to the North American Datum of 1983 (NAD 83).
Altitude, as used in this report, refers to distance above the vertical datum.
Specific conductance is given in microsiemens per centimeter at 25 degrees Celsius (µS/cm at 25 °C).
Concentrations of chemical constituents in water were given either in milligrams per liter (mg/L) or micrograms per liter (µg/L). One thousand micrograms per liter is equivalent to 1 milligram per liter. Milligrams per liter is equivalent to parts per million (ppm) and micrograms per liter is equivalent to parts per billion (ppb).
In this report, the USEPA designation for “lifetime health advisory” is “HA-L,” to avoid possible confusion with USEPA’s Health Advisory Level (HAL), which is a nonregulatory health-based reference level of chemical traces (usually in ppm) in drinking water at which there are no adverse health risks when ingested over various periods of time. It is an estimate of acceptable drinking-water concentrations and provides guidance to water-supply managers. HA-L represents the concentration of a chemical in drinking water that is not expected to cause any adverse noncarcinogenic effects for a lifetime of exposure. The HA-L assumes consumption of 2 liters of water per day over a 70-year lifetime by a 70-kilogram (154 pound) adult, and that 20 percent of exposure comes from drinking water. Only the HA-L is used in this report.
U.S. Department of the Interior | U.S. Geological Survey
URL: https://pubs.usgs.gov/ds/285
Page Contact Information: Publications Team
Page Last Modified: Monday, 06-Aug-2018 17:54:49 EDT
