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Section 3 <br /> Surveying and Sampling <br /> 3.1 SURVEYING <br /> Once installed, the monitoring wells will be surveyed by a qualified, licensed land surveyor. <br /> These wells will be located with regards to both the California State Plane and Geographic <br /> Coordinate Systems, relative the North American Datum, 1983 (NAD83). The elevation of the <br /> north quadrant of each PVC well casing will be surveyed to within 1/100`h of a foot accuracy, <br /> relative to the North American Vertical Datum 1988 (NAVD88) and reported as feet above mean <br /> sea level. The adjacent ground surface will also be surveyed for reference. <br /> Care shall be exercised during surveying to avoid introduction of foreign material into the well. <br /> Rod or receiver bottoms shall be wiped with a chlorine solution prior to setting on well casing <br /> for each well. <br /> 3.2 SOIL SAMPLING <br /> No soil samples will be collected at the site other than those used to classify the geologic <br /> materials penetrated by the boreholes. <br /> Spoils from drilling will be dispersed to land. <br /> 3.3 GROUNDWATER SAMPLING <br /> 3.3.1 WATER LEVEL MEASUREMENTS <br /> Depth to water measurement will be completed and recorded, for all wells,prior to purging and <br /> sampling. Water-level measurements will be taken with an electronic tape (sounder) and the <br /> same sounder will be used at all well monitoring locations, assuring reproducibility of the results. <br /> Water levels will be recorded to the nearest 0.01 foot and will be referenced to the surveyed <br /> datum(north quadrant of the PVC well casing, and or notch carved into the PVC casing). Depth <br /> to groundwater measurements will then be converted to groundwater elevations and reported to <br /> the Regional Board. <br /> 3.3.2 PURGING <br /> A minimum of three well volumes will be purged from the wells prior to sampling. Purging will <br /> be accomplished by pumping with a portable pump or by manually bailing. Field water quality <br /> parameters (temperature,pH, and electrical conductivity) will be collected at the beginning of <br /> purging and after each well volume has been removed. <br /> Well Volume (WV)=water column heightft * 7rrft2 * 7.48 gal/ft3, rft=radius of well in feet; <br /> April 2007 <br /> City or Ripon Wastewater Treatment Facility <br /> 3-1 Groundwater Monitoring Well Installation Workplan <br />