Laserfiche WebLink
G-R Field Methods and Procedures <br /> Grab Groundwater Samalin� <br /> Grab samples of groundwater are collected from the boring using a parastaltic pump or micro-bailer With <br /> the parastaltic pump, new Tygonm tubing is placed in the pump prior to collection of each sample The <br /> tubing is lowered into the boring through the GeoProbe equipment after groundwater has been allowed to <br /> collect The parastaltic pump is used to evacuate water from the boring where it is discharged to laboratory- <br /> supplied containers appropriate for the anticipated analyses With the micro-bailer, the cleaned bailer is <br /> lowered through the GeoProbe equipment into the groundwater The bailer is allowed to fill,then is brought <br /> to the surface where the water is decanted into the sample container The micro-bailer may also consist of <br /> a clean piece of tubing with a check valve at the bottom The tubing is pumped up and down to bring the <br /> water sample to the surface and discharge the sample to the appropriate container <br /> Following collection of the groundwater sample, the sample bottles are then labeled and placed in chilled <br /> storage for transport to the analytical laboratory A chain-of custody form is initiated in the field and <br /> accompanies the groundwater samples to the analytical laboratory <br /> • <br /> A-2 <br />