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� ice. .� ,mow � •�" <br /> t - <br /> e - <br /> i <br /> i <br /> Groundwater 2a--an3 Protc�ol <br /> Prior to arriving at the sampling g site, all <br /> With tap water, Sampling <br /> equipment <br /> wi1Z be washed with laboratoryg , and rinsed twice acetone, delonized water. <br /> The sample washing procedure will bedcarriedOncei out on site before <br /> sampling of other monitoring wells, in such cases where more thon <br /> �. one monitoring well is to be sampled. <br /> Immediately prior to sam Iin <br /> the well will be recorded. g, the depth to water (DTW) level in <br /> top of <br /> r. the groundwater, if The thickness of product on <br /> probe. The present, will be measured using an interface <br /> presented in theGroundwater Monitoringure for Protocol attachment.these monitorings are <br /> If free product is detected <br /> dissolved product will be analysis conducted <br /> l. groundwater for <br /> been removed from the conducted after the free <br /> removed, an interval specific samplingIf lfree device will ba utilized <br /> has <br /> collect a sample from below the zone of freeproduct cannot be <br /> collecting at least two izef to <br /> well will be groundwater samples fromeachwell Before <br /> conductivity Purged until indicator parameters the <br /> at least four or more well <br /> This will entail the(tempera' <br /> of <br /> The criteria for morwellcasing volumes by balling <br /> N` determining well casing volumes and storage not <br /> Purged waste is discussed in the WaterWork Well Development <br /> -�-' Protocol Attachment. <br /> be taken both before Tand he indicator parameter measurements <br /> after will <br /> volume. Once the well is purging of each well casing <br /> sample will be collected patter and well water has stabilized, a <br /> percent of its initial elevation, <br /> slow, the sample wilthe water level approaches 80 <br /> l be <br /> achieved and orough wacollected levelWhereafterrstabilization is <br /> ;w. <br /> ter is present to fill sample containers. <br /> Cross contamination from transferrin <br /> ' well to well will be avoided b <br /> g pumps (or bailers) from <br /> Where this is not feasible thorough cleaning utilizing Of equipdedicateequipment. <br /> Performed between sampling rounds. Sampling will proceed <br /> will be <br /> the least contaminated to the most contaminated well <br /> information is proceed from <br /> �� indicated b available before sample if <br /> Y field evidence. p collection, or if it is <br /> will be performed for a Where several types of analysis <br /> collected in the following order:Well individual samples will be <br /> �.6 <br /> I• Volatile organics <br /> 2• Purgeable organic carbon <br /> 3• Purgeable organic halogens <br /> _.... <br /> 4,_..-...Total-organic carbon <br /> - --- 5. Total organic halogens <br /> b. Extractable organics <br /> ti.. <br />