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09/14/1995 04:52 9093579307 TONTO PAGE 09 ' • • SOP NO. 10.2 RHViSON NO.0 DATE: 03/16NS ' PACE a OF 11 4.5.1 Deconuminue the HydropurnchO probe and push/drive rods in accordance with SOP 6.1. If the Hydtopttnch® model is being used with a small diameter bailer, the bailer WW associated equipment mut also be decontaminated in accordance with SOP 6.1- 4.5.2 Advance the probe to the target depth. which will commonly be a permeable layer as ' defined from the 4acent CFT or other suaflgrapbie inforatatioa Depth control is maintained by counting the number of whole and partial push err drive rods used The Hydmpunche is meastned ai the tip of the tool and zeroed at the around surface. ' 4.5.3 To obtain a groundwater sample, wooer the outer jacket of the Hydroptmch® probe to allow gmutdwam inflow into the sample chamber An optional wchmgrse, used to determine ' when the sample chamber is frill as follows: !_ • Place a s ova the end push rod before the Doter jacket of the ' sampler is • As water eaters ple ba and di:placm air, the glove wiII ittthtse- ' Once glove sops itlflaMS. water has ceded flowing Tato the chamber and the sample may be retrieved. ' The length of time required for the sample chamber to fill is a function of the relative ' permeability of the fortnation and the presence or absence of materials which may dog the filter screen, thereby inhibiting the flaw of wars. 4.5.4 Reattet the probe from the hole. the pits, rods ftcm the Hydropunch®, and remove the upper valve. le a upper valve with a Teflon's stop cock valve and a ' disposable tube (Hydropuye D• Tum pier upside dawn �° � � valve and decant the sample is ot�the sample Conainer. 4.5.5 If using the Hydropmrch®II model with a small diameter bailer. the water sample is / retrieved by lowering the bails through the inside of the push rod into the sample chamber. ' v✓✓ The water recovered in the bailer is then decanted directly into the appropriate sample containers. ' ratio3-1&"MOYr/3oPAMO2