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yyµ('�q$ DE$GIEFSCp6llsANfS <br /> 2.0 FIELD SAMPLING SUMMARY <br />' Groundwater samples were collected from monitor wells MW-2A and MW-9 (Figure 1-1) on <br /> 24 February 1997 Groundwater sampling data sheets are presented in Appendix B <br />' Prior to sampling the water levels in all wells were measured The standing water volumes <br /> within wells scheduled for sampling were calculated using the water level measurements and <br /> total well depths. A submersible pump was used to remove three well casing volumes from the <br /> sampled monitor wells. <br /> 1 At the beginning and during the purge process, the temperature, pH and electrical conductivity <br /> of the purge water was measured. This information was recorded on a sampling data sheet <br /> After purging the well a groundwater sample was collected with a Teflon bailer and disposable <br /> nylon string. The groundwater sample was transferred into 40 ml glass sample containers <br />' Sample containers were checked for air bubbles. The sample containers were sealed in a plastic <br /> bag, placed with ice in an insulated chest, and logged on a chain-of-custody form for delivery <br />' to the analytical laboratory. <br /> The pump used to purge and sample the wells was thoroughly cleaned prior to each use by <br /> placing it into a container of tap water, washing the outside, and pumping water and Alconox <br /> through the pump and attached hose. Tap water was then pumped through the pump and hose <br /> Purge water from monitor well MW-9 was stored in a holding tank Iocated at 222 E Weber <br /> Avenue Purge water stored in the holding tank was sampled and will be discharged to the <br /> sanitary sewer at a later date under a permit from the City of Stockton Department of Municipal <br /> Utilities Purge water from MW-2A was stored in a 55 gallon drum located at 100 N Hunter <br />' Street MW-2A purge water will be disposed of at a licensed treatment facility <br />' All groundwater samples were analyzed by EPA Method 8020 for benzene, toluene, <br /> ethylbenzene, and xylenes (BTEX) and by EPA Method 8015M for total petroleum hydrocarbons <br /> as gasoline (TPH-G) The analyses were performed by American Environmental Network in <br /> Pleasant Hill, California. <br /> L TROJWr=ANJOQWCHSA 3RD 4 "tach 1W <br />