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SCOPE u, dORK FOR REAL ESTATE DIVESTMENI vROJECTS <br /> The proposed scope of work will entail the drilling of three soil borings <br /> and the construction of three ground-water monitoring wells, if ground <br /> water is encountered. The location of the borings is shown on the <br /> attached site plans. Drill cuttings are to be placed on, and covered <br /> with, plastic. Purge water should be containerized in appropriate <br /> 55-gallon liquid drums.. Presented below is a detailed outline of the work <br /> to be performed: <br /> 1. Notify Underground Services Alert to mark known underground <br /> utilities. <br /> 2. Receive all necessary boring/well permits. <br /> 3. Drill the first soil boring (as directed by the Ultramar <br /> Project Manager) to 50 feet or until ground water is <br /> encountered. Soil samples are to be collected every 5 feet or <br /> at obvious lithologic contacts. <br /> If no ground wat?r is encountered: stop drilling at 50 <br /> feet or when two consecutive clean samples, below 40 <br /> feet, (based on PID readings) are obtained. <br /> If around water is encountered_: continue drilling 10 <br /> feet into the saturated zone. <br /> 4. If ground water is present at 50 feet or less below grade, <br /> construct a 2-inch-diameter monitoring well with 5 feet of <br /> screen above and 10 feet of screen below the saturated zone. <br /> Wells are to be completed as per Ultramar's Guidelines. <br /> 5. Drill the remaining two boring locations. If ground water is <br /> present at < 50 feet, construct two additional wells as <br /> described above. If water is > 50 feet, drill the additional <br /> two soil borings to 35 feet or until two consecutive "clean" <br /> soil samples are obtained. <br /> 6. Discuss boring logs and soil sample depths (and corresponding <br /> PID readings) with the Ultramar Project Manager in order to <br /> define which samples are to be analyzed and which lab will <br /> perform the analyses. <br /> 7. If wells are installed, purge and sample the wells as per <br /> Ultramar's Guidelines. <br /> S. Survey the wells to an arbitrary datum to evaluate <br /> ground-water gradient at the site. <br /> 9. Prepare a data package for each site containing a site map, <br /> potentiometric surface map, and soil and ground-water analyses <br /> tables. These data packages must be at Ultramar's Hanford <br /> office by 5:00 P.M. on March 31, 1991. <br /> ]0� ---Przpare-draft technical-report- as per-Ultramar's--Guidelines. <br /> A sample report format will be forwarded to you once the <br /> project is awarded. Draft reports are due at Ultramar's <br /> Hanford office by April 15, 1991. <br />