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1 <br /> iunIGEFS ESCEFSGONARTAXiS <br /> 2.0 FIELD SAMPLING SUMMARY <br /> Groundwater samples were collected from all monitor wells (Figure 1-1) on 15 and 16 December <br /> 1997 Groundwater sampling data sheets are presented in Appendix B <br /> Prior to sampling water levels in all wells were measured on 15 December The standing water <br /> volumes within wells scheduled for sampling were then calculated using the water level <br /> measurements and total well depths A submersible pump with a new disposable hose was used <br /> to purge three well casing volumes from each monitor well. <br />' At the beginning and during the purge process, the temperature, pH, and specific conductance, <br /> of the purge water were measured This information was recorded on a sampling data sheet <br />' Groundwater samples were collected with a disposable bailer and nylon string The groundwater <br /> sample was transferred into 40 ml glass sample containers Sample containers were checked for <br />' air bubbles, sealed in a plastic bag, placed with ice in an insulated chest, and logged on a chain- <br /> of-custody form for delivery 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 and washing the outside of the pump The disposable <br /> hose was discarded after purging each well <br />' Purge water from MW-2A and MW-2 was stored in a 55 gallon drum located at 100 N Hunter <br /> Street Purge water from the remaining wells was stored in a holding tank located at 222 E <br /> Weber Avenue The purge water stored in the holding tank will be sampled and discharged to <br /> the sanitary sewer at a later date under a permit from the City of Stockton Department of <br /> Municipal Utilities MW-2A and MW-2 purge water will be disposed of at a licensed treatment <br />' facility by a subcontractor <br />' Groundwater samples were analyzed by EPA Method 8020 for BTEX and by EPA Method <br /> 8015M for TPH-G by American Environmental Network in Pleasant Hill, California <br />' A groundwater sample was collected from MW-2 However, the well appears to have collapsed <br /> The total well depth was tagged at 37 6 feet below the top of the casing and sand was pumped <br />' from the well The total depth of the well was originally 45 5 feet below ground surface <br /> I <br /> L TROJECr5N.5ANJOQkHWH5A 97 DEC 4 Jamary 1995 <br />