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<br />Exhibit "A" <br /> <br /> <br />;.,' <br />ChemRisk <br /> <br />A McLaren Company <br /> <br />980 Atlantic Ave., Suite 100 <br />Alameda, California 94501 <br />(415) 521-5200 <br /> <br />i, , <br />'. <br /> <br />June 13, 1989 <br /> <br />I@~~,.- <br />t. <br /> <br />Mr. Tom Passanisi <br />Redwood City Planning Division <br />1017 Middlefield Road <br />Redwood City, CA 94604 <br /> <br />Subject: Vestport Project Field Sampling Options <br />Reference: Letter dated June 5. 1989 from S. Ripple to T. Passanisi <br /> <br />Dear Tom: <br /> <br />I have revised the field sampling options identified in the referenced <br />letter to reflect requests made during our meeting of June 9, 1989 with <br />your office and the County Health Department. The sampling options are <br />summarized in the enclosed tables and the revised estimated costs have <br />also been enclosed. <br /> <br />The principal change in the sampling options is the inclusion of the <br />construction and sampling of two deeper groundwater wells on the mound <br />area of the site, and the sampling of soil gases in the non-refuse fill <br />areas of the site. As indicated on the enclosed tables, the results of <br />these sampling activities are not expected to contribute to preparation <br />of the health risk assessment. The results of these investigations will <br />contribute to the further characterization of the site. <br /> <br />To date, I have not provided you with any cost estimates associated with <br />our scoping activities for identification of the field sampling options. <br />Estimated costs associated with scope development and scoping meetings <br />(two meetings) are as follows: <br /> <br />Principal Scientist 32 hrs. x $100 /hr. $ 3,200 <br />Principal Hydrogeologist 20 hrs. x 1l0/hr. 2,200 <br />Supervising Engineer 5 hrs. x 100/hr. 500 <br />Senior Geologist 5 hrs. x 75/hr. 375 <br />Secretarial 8 hrs. x 3J/hr. ~ <br /> TOTAL $ 6,515 <br />