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IAAR-24-99 16 50 From WOODWARD CLYDE T-733 P 29/34 Job-492 LUWr=,rvu,t-iuw,ray uouyn...b... wel➢ P"ag The Sampler is engineered to obtain it sample from any depth desired This means that the sampler can be lowered down the well to a depth substantially below the top of the screened interval, where the well is free to communicate with formational groundwater The result is a represcmatsve sample of the formational groundwater without the generation of hazardous purge-water waste and associated disposal costs -rurbmtp Turbidity is kept low due to the Hydrodynamic shape of the sampler The "bullet" shape of the sampler weight. attached to the sampler body, gently and almost impemepubly pierces the water column creating larrunar flow across the smooth outer sampler body surface The result is minimal disturbance to the:settled flocculants and clay/silt particles in the well and therefore, less turbid sample collection, Low VUC Loss The sample Collection tube is positioned So that it rests approximately e/4" above the bottom of the sample container The container is slowly filled from the bottom up being :repeatedly rinsed with the receiving sample, assuring purity through repeated flushing The sampler flashes the sample container a minimum of six times (4 tithes for the 1 later sampler) before actually taking the sample for laboratory analysis. Because the sample is collected directly into the sampling container, VOC loss through sample transfer is eliminated. Because there is little disturbance to the water column daring sampler penetration,VOC loss is eliminated Finally, because the sample container is filled from the bottom-lap via laminar flow and in the absence of air(at the point of filling), effervescence, splashing, and bubbling (sources for volattliaatian) is elirnineW. The sample container is removed from the sampler, preserved, and immediately capped. BEIMP93 Fmoormfiom The sample may be preservrod using any appropriate pruserva tson compound or by acidifying after romoving the sample container from the sampler The sampler is designod for ease of operation and di'contamnabon (D1 CON) In order to DECON the sampler after use, simply immerse the sampler alternately in Alconox7m (or equivalent) and tap water for four cycles and rinse in d®-ionised water. I_at the sampler air dry or immediately load and proceed to the next well Where free petroleum product is encountered. additional scrubbing may be n=assary to remove the petrolourn product film The pouched all-stainlass steel construction also allows the sampler to be periodically cleaned in an autoclave COW gensato In a study conducted at the Hanford Ramediation Operable Management Unit (ROM) (1), a cost savings easing this sampler was evaluated against submerstble pump, purge, and samplo methods, and low-flow, fore-stress bladder pump and purge methocis The comparison result showed an overall BV/6 cost savings using this sampler in a no-purge sconano FIRE SAMPLUMM PROTOCOL Fivak conele $aria 4o sampling While this protocol is useful and applicable tri a wido variety of sampling circumstances, it is not germane to all circumstances It is necessary to undamtand the primary reason for purging groundwater-monitoring wells is to refresh the well-bore water, thereby assuring acquisition of a representative sample The no-purge protocol is 3of8 3/241"422 PM