Laserfiche WebLink
i <br /> Groundwater Monitoring Well Installation Work Plan 3 <br /> The Southland Corporation-Store#20632 4627 Da Vinci Drive,Stockton,CA November 30,1998 <br /> Portland Type 1/II cement to 5 gallons of clean water. The wellhead will be protected at the surface by a <br /> locking, expandable cap and traffic-rated street box(with watertight bolted lid)set in concrete. The well will <br /> be used to characterize the extent of dissolved petroleum hydrocarbons beneath the site. <br /> Following installation,the monitoring well will be developed by hand bailing to remove fine-grained <br /> sediments from the well and filter pack. Water from the development process will be containerized and <br /> temporarily stored on site in DOT-approved 55-gallon drums. <br /> The top of casing of the well will be professionally surveyed relative to a mean sea level datum. The newly <br /> installed well,along with all site-related monitoring wells,will be monitored to measure static liquid levels <br /> during the fourth quarter groundwater sampling and monitoring event. Liquid levels will be monitored using <br /> a field instrument that distinguishes between water and petroleum products. <br /> Following monitoring,field instruments will be used to determine dissolved oxygen levels in the well. <br /> Approximately three well casing volumes of water will be purged from the well prior to sampling. During <br /> purging, pH,temperature,and conductivity of purged water will be measured until measurements have <br /> stabilized. Groundwater samples will be collected from the well. Collected groundwater samples will be <br /> analyzed by a State-certified analytical laboratory for BTEX, MTBE, and TPH-G by EPA methods <br /> 8020/8015 modified, and the oxygenates:TBA,MTBE,DIPE,ETBE,TAME by EPA Method 8260. <br /> TASK 4: REPORT-PREPARATION/SCHEDULING <br /> Fluor Daniel GTI will prepare a report summarizing the data collected under the scope of work detailed <br /> above. The report will document the methods and results of the work,summarize laboratory analytical <br /> results,and include appropriate maps.The report will also document field work and results of the fourth <br /> quarter monitoring and sampling event,and the recent underground storage tank removal at the site. <br /> Field work will commence following written regulatory agency approval of this scope of work. <br /> I. <br /> I <br /> I <br /> I <br /> 20632wkp.@r <br /> FLUOR DANIEL GTI <br />