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E <br /> PP� <br /> b� <br /> 4k <br /> WaterWork <br /> Groundwater SaMlin pzotocol <br /> Prior to arriving at the sampling site, all sampling equipment <br /> will be washed with laborato <br /> with to ry grade detergent, and rinsed twice <br /> P water, once with acetone, and once with deionized water. <br /> The sample washing Procedure will be carried out on-site before <br /> sampling Of other monitoring wells, in such case <br /> one monitoring well is to be sampled, s where more than <br /> { Immediately prior to sem lin <br /> ` the well will be recorded. gTheh fc tnesof th to ter (DTW) level in <br /> th <br /> the groundwater, if present, will be measured using an interface <br /> probe. The Product on top of <br /> presented in theGroundwater Monitoringfor these <br /> conducting monitorings are <br /> ing Protocol attachment. <br /> If free product is detected, analysis of groundwater for <br /> been removed of from will be conducted after the free rad <br /> he well. If -all free P uct has <br /> removed, an interval specific sampling device will be utili ed to <br /> collect a sample from below the zone of free product. Before <br /> collecting at least two groundwate <br /> well will be r samples from each well, the <br /> ti conductivi purged until indicator parameters (temperature, <br /> ty and PH) stabilize. This will entail the removal of <br /> at least four or more well <br /> The criteria for determining aW ll casing volumes volumes by and storage Pumping.ing or <br /> purged waste is discussed in the WaterWork Well Development <br /> g of <br /> Protocol Attachment. <br /> The indicator <br /> be taken both before and after Parameter measurements will <br /> volume. Once the well is Purging of each well casing <br /> {{� sample will, be collected Purged <br /> the wwater levelell water s stabilized,es a <br /> k' percent of ats initial elevation. W approaches 8s <br /> slow, the aaR, here water level recovery is <br /> Sample will be collected after stabilization is <br /> achieved and enough water is present to fill sample containers. <br /> Cross contamination from transferrin <br /> (orf. ) from <br /> well to well will be avoided by utilizingp dedicatedilersequipment. <br /> Where this is not feasible thorough cleaning of equipment will be <br /> Performed between sampling rounds. <br /> the least contaminated to the most contaminated well, if <br /> information is available before sample collection proceed f from <br /> �. indicated by field evidence. or f it is <br /> ti - <br /> i,, <br /> Groundwater samples will be collected with a Teflon bailer with <br /> bottom emptying p Ying devices..—_Duplicate---samples-will ba trenserred --- - -- <br /> --to -vials--or containers that meat Regional Hoard specifications <br /> -- — ------ <br /> (Table 1). Groundwater from the bailer will be transferred to -- ----- <br /> the sample container b <br /> Y allowing the fluid to flow slowly along <br /> the sides of the vessel, All containers will be filled above the <br /> 4top of the opening to form a <br /> Positive meniscus. No head space . <br /> E <br />