Laserfiche WebLink
• another well within SWMU No. 8 would supply more specific <br /> information about Area 8 . Analytical data from LM19 would <br /> not produce reliable data in defining the impact on the <br /> groundwater from this burn area with its history of varied <br /> contaminant exposure. LM19 is much closer to other <br /> potential point sources for some of the contaminants than it <br /> is to SWMU No. 8. Installation of a new groundwater <br /> monitoring well within the boundary of SWMU 8 is <br /> recommended. <br /> 41. Page 3-39, Section 3.2.5.5.4. 1 <br /> Explain the radiochemical constituents. (Are only gross <br /> alpha and gross beta being examined?) Provide the <br /> rationale. <br /> 42 . Page 3-43, Section 3.2.6.5.2 . 1 <br /> Well LM20 is approximately 300 feet downgradient from SWMU <br /> No. 10 (Medical Supplies Burial) . This SWMU has very <br /> uncertain boundaries and analytical data from a well at this <br /> great a distance cannot be considered representative of the <br /> contributions of the great variety of possible contaminants <br /> from this poorly defined area. Propose the installation and <br /> sampling of another groundwater monitoring well within SWMU <br /> 10. <br /> 43 . Page 3-43, Section 3.2 . 6.5.3.3 <br /> In section 3.2 . 6.2 .4 , the text states that groundwater in <br /> the area of SWMU No. 10 is anticipated to be at 19 feet <br /> below grade. However, in 3.2 . 6.5.3.3 , the text states that <br /> the trenches would be dug to a depth of 5 feet above the <br /> first water-bearing zone estimated to be 21 feet below <br /> grade. This discrepancy should be cleared up. Explain what <br /> guidelines will be used to determine whether to backfill <br /> with the excavated soils or with clean imported fill <br /> material. <br /> 44 . Page 3-44, Section 3.2 . 6.5.4.1 <br /> State which specific narcotic compounds are potential <br /> hazardous wastes. <br /> 45. Page 3-56, Section 3.2.9.3.7 <br /> Since a phthalate compound was found in well LM22, the <br /> analytical procedure for detection of SVOCs (EPA method <br /> 8270) should also be included for SWMU No. 14 . <br /> 46. Page 3-58, Section 3.2 .9.5.4.2 <br /> It was previously stated in section 3.2 .9.3 and 3.2 .9.5. 1.2 , <br /> that a "fine, white chalk-like soil was observed clinging to <br /> the soil gas sampling probe" in SWMU No. 14, the Lube-oil <br /> Dump. Due to this finding and the proximity of the <br /> pesticide waste disposal trench, SWMU No. 15, the analytical <br /> procedures performed should be expanded to include <br /> I-15 <br />