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' SMT'H <br /> the site. The new wells will be developed using surge and bail techniques until the produced <br /> water is relatively sediment free. Prior to the collection of groundwater samples, a minimum <br /> ' of three well volumes (casing and sandpack) will be purged. Temperature, pH, water elevation, <br /> and electric conductivity will be measured and allowed to stabilize. Water samples will be <br /> collected using disposable bailers, one dedicated to each well. Groundwater samples collected <br /> from all monitoring wells will be submitted using chain-of-custody record to a State-certified <br /> laboratory for analysis of priority metals, cyanide, semivolatile organics, volatile organic <br /> compounds, chlorinated pesticides and PCBs, and total oil and grease by the above described <br /> methods. Purge water will be stored in 55-gallon drums approved for hazardous liquid storage <br /> pending laboratory analysis. If all constituents are reported as nondetectable in the groundwater, <br /> ' it is proposed that the purgewater be discharged to the ground surface. <br /> tTask 4 Report Preparation <br /> Upon completion of all field activities an assessment report will be prepared for submittal to <br /> SJCPHS. The report will summarize field and laboratory procedures as well as all analytical <br /> data and will include any recommendations for additional investigation if necessary. <br /> ' PROJECTED SCHEDULE <br /> The soil boring and well installation will require two days to be completed. The field work is <br /> ' tentatively scheduled for June 20 and 21, 1995, dependent upon when the necessary permits are <br /> obtained. Once the field work is complete and all laboratory results have been received, the data <br /> ' will be analyzed and the assessment report will be prepared. Preparation of this report will take <br /> approximately three weeks. SMTH can initiate work at the site after receiving authorization to <br /> ' proceed. <br /> 1 GROUNDWATER MONITORING PROGRAM <br /> After the initial groundwater sampling event, Olin Corporation proposes to sample the <br /> monitoring wells annually with analysis limited to pH, conductivity, and lead as indicator <br /> parameters. Quarterly visual inspection of monitoring well integrity is also proposed. ✓ <br /> N:05136\REPORTS\0UN.WP 5 <br /> I <br />