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Observations and Measurements <br /> es <br /> "- Included in the scope of work e th Wei measurements s i ale fo ev acuauoinvestin and tive sampling. <br /> which are intended to dete roduct zone(FPZ)encountered. The presence of <br /> These included the thickness of any free p <br /> -• a significant <br /> fiW fleas the condition of groundwater lying below the FPZ. Thefforts to CO is interference is <br /> accurately <br /> caused by adhesion of Petroleum to any device beingak free ottiraugling device and be <br /> likelihood that minute globules of petroleum may results from wells containing <br /> included in the sample. Accordingly,evaluation of analyticald e.results <br /> any amount of free petroleum should inclusion. <br /> account <br /> de6son to sample or ossibility that notisample such <br /> have been spewed higher by suchthe cosultant who <br /> wells is left to the guidelines based an the need iscre for current informtion of our fieldersonnel at the site anation onngroundwatteresta - <br /> lishes sampling <br /> conditions at the site. <br /> EQUIPMENT <br /> Selection of Evacuation Equipment <br /> JJ.S.Tech <br /> The detaimitisuon cf what apparatussto be were seldon the ected for thels was made <br /> evacuation 0 the six ells. <br /> personnel. Electric Submersiblepumps <br /> urn <br /> Electric Submersible Pump f any <br /> urovidedlthe ellsdiame are er its large enough te for the oh <br /> volume evacuation of wells o y p P <br /> admit the pump. Four inch and three inch diameter:yells will readily accept electric <br /> submersible pumps,while two inch wells do not. In operation,the pump is lowered into <br /> the well with a pipe train above it A checkvalve imrtiedia pip above the pump and below <br /> the first section of pipe prevents water that has entered the pipe from flawing back into the <br /> well. Electricity is provided to the pump via an electrical cable and the action of the pump <br /> is to push water up out of the well. <br /> STANDARD PRACTICES <br /> --------------- <br /> Evacuation <br /> rsonnel <br /> U.S.Tech made the detem�icsadon of when samples should btas the well is evacu- <br /> useseveral standard instruments to record the changes in parameters <br /> aed These instruments are used regardless of whether or not a specific volumetric stand- <br /> and has been called for. As are <br /> that occnt will urred during the s beprovided <br /> va evacuation procerecord <br /> d o£the pH,EC,and temperature changes <br /> eNo.91D318 C-t US.Tech page <br /> a <br /> BLiioeTerhSeMas,Iae.Repc-- --------- ------- --- -- <br /> I . <br /> i k !� <br /> F <br /> x <br />