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stabilized Groundwater samples will be collected from each well using disposable polyethylene bailers Groundwater samples will be decanted from the bailers into 40-m1 glass VOA vials, pre-preserved with hydrochloric acid, and sealed without headspace All samples will b e labeled with the site location, sample designation, date and time the samples were collected, and the initials of the person collecting the samples The samples will be placed on ice for transport to the analytical laboratory under chain of custody Purged groundwater will be stored on-site in sealed and labeled 55-gallon steel drums until off-site disposal can be arranged TASK 9 - ANALYZE THE GROUNDWATER SAMPLES The groundwater samples will be analyzed by a CAL EPA certified analytical laboratory for TPH-G, BTEX, oxygenates, alcohols and HVOCs. by EPA Method 8260 and TPH-D by modified EPA Method 3550/8015 TASK 10 - SURVEY THE TOP OF CASING ELEVATION OF EACH WELL • The ground surface elevation and horizontal location (northing and eastxng) of each boring and top of casing clevatzon of each well will b c surveyed relative to mean sea level by a California licensed surveyor TASK ]] - PREPARE A SUBSURFACE ASSESSMENT REPORT ASE will prepare a subsurface assessment report outlining the methods and findings of this assessment This report will include a summary of the results, the site background and history, description of the well construction, development and sampling, tabulated soil and groundwater analytical results, potentiometric surface maps, rsoconcentrations maps, geologic cross-sections, conclusions and recommendations Formal boring logs, analytical reports, and chain of custodies will be included as appendices This report will be submitted under the seal of a California registered civil engineer or geologist Frank's One Stop Workplan — June 2000 -16-