ARCHIVED REPORTS_1988 - Laserfiche WebLink

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b COHOLLOW LANDFILL 9 March 1988 • SWAT PROPOSAL REVIEW - - 5. All monitoring well PVC casing and screens are to be National Sanitation Foundation (NSF) approved. 6. All deep monitoring wells (casings and screens) are to be suspended from the surface during construction and are not to rest on the bottom of the borehole. 7. The non-metals analyses methods proposed for the water quality program are generally used for soil analysis procedures. To possibly save some of the analytical costs and to get better detection limits, we recommend using the following methods for the water analyses: Comp® Proposed Anallsis Recommended Analysis Wipes Method Method Volatile Organics 8240 601 & 602 Semi-Volatile Organics 8270 625 Pesticides & PCBs 8080 608 Analysis of the above compound types shall identify and report all peaks. 8. The metal analyses recommended for Atomic Absorption methods should include chromium". 9. To better characterize the unsaturated zone, the lithology and the soil-pore liquids, we recommend that MW-4 and W-5 have soil samples taken every five feet with the split-spoon sampler. The samples could then be split and a ®.� composite made for each of these monitoring wells. The composite sample a would be used for soil-pore liquid �analysis. 10. The proposed soil sampling points are insufficient to fully characterize the unsaturated zone at the site, specifically, along the property line adjacent ,`, to Corral Hollow Creek. To fill this data gap, recommend making at least d three additional equally spaced soil sample borings along this property line. The borings should be performed using a HSA with samples taken every five feet to a depth of at least 35 feet. A composite from each boring can be made for performing all analysis for the sampling point. If perched water is encountered during boring, consideration should be given to constructing a monitoring well in the borehole. Ill. Soil samples should also be analyzed for the 26 ICA metals, with arsenic, selenium, mercury, and chromium+d analyzed using the Atomic Absorption method. 12. All non-metal analyses methods for the soil and water sampling program are to identify and report all pollutant scan peaks.