Each folder at this level (fumarole_data, spring_data, stream_data, well_data) contains data files in which the filename is structured such that the site name is contained in the characters before the underscore symbol ( _ ) and the type of data is contained after the underscore symbol. Each folder at this level will have subfolders if there is more than one data file associated with that site. For example, under the directory well_data, there is a folder ch10b, which contains several files. The site name (the characters before the underscore symbol) can be matched up in the excel file called lvc_hydrology_locations.xls, which is in the same directory as this readme.rtf file. Data types are given after the underscore in the file name and include: airtp air temperature dis discharge, mean daily computed from gage heights dismeas instantaneous discharge measurement by meter gageh gage height with arbitrary datum tlog temperature with depth in wells tp temperature, for water temperature unless otherwise noted venttp temperature of gas discharged from steam vent wl water level in a well given as depth to water below land surface wq chemical analysis of water sample