Laserfiche WebLink
The static water level and the depth of the well shall be measured with the indicator, <br />written down on the field data sheet or field notebook, and immediately rechecked before <br />the indicator is removed from the well. <br />Care should be taken to verify the readings during each water level measurement period. <br />Note any significant changes in water level, by comparing the most recent measurement <br />with past measurements, if appropriate. <br />The water level depth below the measuring point (in feet) will be subtracted from the <br />measuring point elevation to determine the elevation of the static water level. If <br />measuring point elevations are available at the time of water level measurement, the <br />calculated water elevation should be checked in the field to see that it is reasonable and <br />the subtraction was performed correctly. If there is a discrepancy, the well should be <br />measured again. <br />All columns of field data sheets shall be completed, including time of measurement. If <br />items on the sheet do not apply to a specific location, the item will be labeled as not <br />applicable (NA). A field data sheet for water elevation measurement is shown as <br />Figure 1. Section 5.5 describes the documentation required. <br />5.3 DECONTAMINATION <br />The water level indicator must be decontaminated before using between wells and at the <br />conclusion of measurements. The probe will be decontaminated according to the procedure <br />for decontamination of sampling equipment described in SOP No. 10.0. Probe <br />decontamination can be completed at the wells. <br />6.0 DOCUMENTATION <br />Documentation of observations and data acquired in the field will provide information on <br />the activities concluded and also provide a permanent record of field activities. The <br />observations and data will be recorded with waterproof ink in a permanently bound <br />weatherproof field logbook with consecutively numbered pages, and on field data sheets. <br />6.1 FIELD DATA SHEET FOR WATER LEVEL MEASUREMENTS <br />A field sampling data sheet for groundwater samples (Figure 1) will be completed at each <br />sampling location. The data sheet will be completely filled in. If items on the sheet do <br />not apply to a specific location, the item will be labeled as not applicable (NA). The <br />information on the Powertech database Water level Form. <br />Note: BE SURE TO DECONTAMINATE THE PROBE BETWEEN WELLS <br />Powertech <br />Rev. SOP 6-IJAB <br />4/23/2007 <br />R Squared Inc <br /> <br />Attachment A