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' Libbey Owens Ford Co,-Preliminary Soil and Groundwater Investigation Report Standby Generator Diesel Supply Line January 20, 1997 Page 4- Upon completion of the sampling, the boreholes were grouted with a cement slurry containing approximately 4 percent bentonite. The slurry was tremied into the borehole to avoid bridging. The decontamination rinsate was placed in a 55-gallon drum, sealed, labeled, and left on site pending laboratory analyses. Disposal of hazardous materials, if any, will be the responsibility of the property ' owner. ' 3.2.1 Soil Sampling The boreholes were sampled continuously from the surface to approximately 15 feet bgs using ' a 1.5-inch 1.D., macro core soil sampler fitted with a 4 foot long, clear, polyethylene, liner (see Appendix B for a description of the macro core soil sampling system). The soil sampling equipment (i.e., core barrel) was cleaned prior to collecting each.sample. The cleaning procedures consisted of washing the core barrel in a solution of laboratory-grade, non-phosphate detergent and hydrocarbon- free water, and double-rinsing with hydrocarbon-free water. ' During the sampling, the core barrel was hydraulically pushed at each 4-foot interval. The core barrel sample was used for geological logging and for field screening using an organic vapor ' analyzer-photoionization detector (OVA-PID). Based on the field observations, selected portions of the core barrel liner were cut into 6-inch sections for chemical or geotechnical analyses. The soil was ' logged according to the Unified Soil Classification System. The drilling logs contain field observations including soil type, estimated moisture content, presence of staining or odor, and field OVA-PID measurements. tSol] samples were collected from the upper vadose zone, capillary fringe, and the saturated zone for chemical and/or geotechnical analysis. Eleven (11) soil samples, one per borehole, were ' retained for chemical analysis. Four (4) additional soil samples were retained for geotechnical testing. The sample liners selected for analysis were sealed at the ends with Teflon tape, capped, and labeled. 1 The samples retained for chemical analyses were stored in a cooler chilled with ice and delivered within 24 hours of-collection, under chain-of-custody procedures, to GeoAnalytical Laboratories of ' Modesto, California (see Section 3.3). The samples retained for geotechnical testing were shipped, under chain-of-custody procedures, to Cooper Testing Laboratories of Mountain View, California (see ' Section 3.4). ' � CONDOR