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I <br /> L <br /> lk- <br /> LEEDSHILL•HERKENHOFF. INC. <br /> All monitoring wells ill be constructed and developed to provide discrete, <br /> representative _samps'-Monitoring wells will be developed using a combina- <br /> tion o air developmQnt; surging, and/or pumping as directed by the on-site <br /> engineer. ue to the suspected volatile compounds being investigated, <br /> extreme care will be exercised during the collection of these samples to <br /> ensure representativeness. EPA and Health Services protocol will be fol - <br /> lowed by field personnel during the collection, preservation, and transport <br /> of collected samples, Water quality sampling __stabilization records and <br /> chain-of-custody forms will accompany each set of samples. <br /> Groundwater Sampling <br /> Representative groundwater samples will be collected from each of the three <br /> monitoring wells. The samples will be collected using a 4-inch diameter <br /> stainless steel Grundfos submersible pump and galvanized discharge piping. <br /> Each well will be pumped in an attempt to purge a minimum of 5 well volumes, <br /> while field monitoring pH, conductivity, temperature and pumping rates to <br /> establish stability. All equipment will be high pressure steam cleaned <br /> prior to installation. <br /> Analytical Methods <br /> The analytical methods which will be utilized conform to EPA Test Methods <br /> for Organic Chemical Analysis of Municipal and Industrial Wastewater and <br /> Methods for Chemical Analysis of Water and Wastes. EPA Method 601 will be <br /> used to analyze water samples from the monitoring wells. As required, all <br /> positives will be dual confirmed by dissimilar column confirmation. All <br /> analytical laboratory work will be conducted by Agriculture and Priority <br /> Pollutants Laboratories, Inc. (APPL) a certified DOHS analytical laboratory. <br /> All samples will be collected and preserved according to approved EPA meth- <br /> odology; samples will be cooled to 4° C at the site and maintained at that <br /> temperature until they are received at the laboratory. All samples will be <br /> analyzed or extracted prior to expiration of approved holding times. <br /> Completed records will be kept on all samples including sampling date, <br /> sample type, preservation (if any) and location of sample. All samples will <br /> be shipped to the laboratory within 24 hours of collection under approved <br /> preservation techniques and with appropriate chain-of-custody procedures. <br /> -4- <br />