WORK PLANS - Laserfiche WebLink

Home Browse Search

�+iii:D STANDARD OPERATING PROCEDURES FOR MONITORING WELL INSTALLATION AND DEVELOPMENT SECTION I. MONITORING WELL INSTALLATION 1. OBJECTIVE To establish accepted procedures for the installation of monitoring wells for sites under investigation or remediation from impacts with chemical contaminants. 2. BACKGROUND Monitoring wells are used for subsurface investigation and remediation projects. Well-designed monitoring wells provide data on groundwater movement, groundwater quality, seasonal water table fluctuations, rates of natural attenuation, and changes in contaminant concentrations through time. Monitoring wells are installed in accordance with the California Well Standards (Department of Water Resources Bulletin 74-90) and with the appropriate lead agency guidelines. 3. PERSONNEL UTILIZED AND RESPONSIBILITIES Professional Geologist: A Professional Geologist(PG) is responsible for ensuring that the monitoring wells are properly installed, that the possibility of cross contamination between aquifers has been minimized, and that the well installation will achieve its desired purpose. The PG oversees the project and ensures that field personnel have been trained in the use of this procedure. Field Geologist/Figld Engineer/Soil Scientist: The responsible professional in charge of field work must determine the location and depth of each well, and decide on the sampling interval. GHD field personnel will oversee installation of the well, collect samples and prepare them for transport to the laboratory, and records lithologic and other observations. The field personnel is responsible for site safety and health, and compliance with this SOP and for submittal of the well completion report to the Department of Water Resources. Staff Technician: A staff technician has 0.5 to 5 years experience logging borings, installing and developing monitoring wells. The staff technician is responsible for complying with these procedures, lithologic logging, collection of samples, and field documentation, and development of wells prior to sampling. The staff technician will call the PG with field observations and contaminant data to obtain approval of final well design. Driller(Subcontractor): An appropriately licensed (C57) drilling contractor must employ an OSHA- certified crew. The Driller is responsible for the safety and conduct of their employees and complying with the project specifications described in the Workplan and contract. All drilling and sampling methods will be consistent with ASTM Method D-1452-80, and local, state and federal regulations. The Driller is responsible for installing monitoring wells according to pertinent agency standards. GHD SOP MW Install&Dev 1 of 6 Rev 2/14