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Mr. Troung Mai ' <br /> Arcady Dump Site <br /> Holt, California - 4 - 1 December 2000 <br /> 12. Page 3-6 A bentonite slurry or pellet seal All material (i.e. filter pack, transition sand, <br /> Section 3.2.1 will be placed above the sand well seal and grout) should be placed in the <br /> pack and the remaining borehole using a tremie pipe. <br /> annular space will be grouted <br /> to the surface with a cement <br /> grout mixture. <br /> 13. Page 3-6 Monitoring Well Installation There is no reference made to surveying the <br /> Section 3.2.1 well's position and elevation once the well <br /> has been installed. <br /> 14. Page 3-6 Groundwater samples will be The site will require sampling from seven <br /> Section 3.2.2 collected from the four newly onsite wells and the one background well. <br /> installed monitoring wells and Prior to purging and sampling any of these <br /> two existing monitoring wells wells, depth to water measurements from the <br /> at the site. certified surveyed reference mark must be <br /> taken. <br /> 15. Page 3-7 Monitoring Well Groundwater The proposed list of analytes is incomplete. <br /> Section 3.2.3 Sample Analysis Each well must also include all Title 22 <br /> Total Ba, Cr, CrVI, Hg, Pb and Metals including Hexavalent Chromium, <br /> TPHDiesel Alkalinity, Calcium, Chloride, pH, Sodium, <br /> Potassium, Sulfate, Sulfide, Total Dissolved <br /> Solids, Total Hardness, Conductivity, <br /> TPH as gasoline,BTEX, PAHs VOCs, <br /> SVOCs and Oil and Grease. In addition, the <br /> collected samples for metals must be filtered <br /> prior to analysis. <br /> 16. Page 3-7 It may be difficult to collect Runoff samples must be collected during a <br /> Section 3.3 actual runoff water. storm event. A benchmark should be placed <br /> at the sampling location, so the results can <br /> be duplicated. <br />