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The well screen for MW-11 will be placed across the top of the static water level. This well <br /> will be designed to afford the opportunity to monitor the top of the uppermost portion of <br /> the aquifer and allow for approximately 13 feet of water level rise.The base of the screen <br /> �1? `hvill be at 65 feet below ground surface which coincides with the top of the screened interval <br /> of the next shallowest,existing monitoring point(NP-2) in the area of the former pump <br /> island. Therefore,if water elevation decreases below the base of MW-11,other existing <br /> pe wells will be able to resume monitoring the top of the uppermost saturated interval. <br /> 0 <br /> Due to the anticipated depth of MW-11D(i.e.,greater than 100 feet below ground surface), <br /> this boring and well will be installed differently than the other borings. MW-11D will be <br /> installed with the following general protocols: <br /> • Drilling shall be conducted to prevent cross contamination of the impacted <br /> groundwater with deeper water bearing zones. <br /> • Drilling will continue until there are no significant concentrations of petroleum <br /> constituents in the soil or groundwater. <br /> • Grab groundwater sampling will be conducted using Hydropunch or equivalent <br /> techniques. <br /> • Sampling of grab groundwater samples will be collected in permeable water bearing <br /> intervals below 90 feet bgs and submitted for 24-hour analysis of TPH-gasoline,BTEX <br /> and MTBE. <br /> • Converting the boring to monitoring well•MW-11D will be conducted after the 24-hour <br /> analytical results indicate that the depth is below the contaminated soil and <br /> groundwater and concurrence has been obtained from Ron Rowe of PHS. <br /> After both MW-11 and MW-11D have been completed, these wells will be developed and <br /> sampled according to standard protocols previously used at the Disco property. <br /> Subtask 3 Laboratory Analysis <br /> Selected soil and grab groundwater samples from each of the borings in Activity I will be <br /> submitted to a state certified laboratory. The samples will be analyzed for gasoline <br /> constituents and geotechnical parameters as specified in Table 1.The soil samples will be <br /> analyzed using a standard 10-day time period. The grab groundwater samples will be <br /> analyzed in a 24-hour time period. <br /> Subtask 4 Reporting <br /> Under this subtask,a letter report will be issued summarizing the findings of Activity 1.The <br /> report will include the boring logs,tabulate the field and laboratory chemistry findings, <br /> 1� G � and recommend refinements to the plans for Activities II and III. <br /> 4 <br />