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Site Investigation Work Plan <br /> Raymond Investment Corpomfion <br /> ' Former Helena Chemical Facility <br /> Page 4 <br /> 5.0 SOIL AND GROUNDWATER ANALYSIS AND DISPOSAL <br /> ' The fifty(50) soil and groundwater samples will be analyzed for TKN, Ammonia, and Nitrate. Four(4) of <br /> those samples collected from locations B37 and B38 will also be analyzed for OCPs, hydrocarbons, and <br /> metals. B37 and B38 are near the location where materials handling violations were recorded in 2006. <br /> ' The additional laboratory analysis near this location appears to be needed because in 2006 there may have <br /> been some removal of materials released to the soil surface, but no verification sampling was <br /> documented. The OCP Endosulfan was detected in the waste characterization sample that was analyzed <br /> ' for disposal. <br /> The soil and groundwater samples collected from borings will be analyzed for: <br /> ' Hydraulic Conductivity(ASTM D2434 of ASTM D5084) <br /> TKN(EPA Method 351.2) <br /> Ammonia as N(EPA Method 350.2) <br /> ' Nitrate as N(EPA Method 300.0) <br /> OCPs (4 Soil)(EPA Method 808 1) <br /> TEPH-D, MO, K(EPA Method 8015M) <br /> ' TPH-GBTEX/MTBE(EPA Method 8015M/8021 B) <br /> LUFT 5 Metals(EPA Method 6010/7000 series) <br /> ' 6.0 PROPOSED MONITORING WELL LOCATIONS AND SAMPLE INTERVALS <br /> A total of three (3) groundwater monitoring wells are proposed. The primary purpose of the monitoring <br /> wells will be to verify the Site groundwater gradient. Geotracker data for nearby sites indicate that the <br /> ' local groundwater gradient is to the east, Table B, Appendix B. The proposed locations of the monitoring <br /> wells are shown on Figure 2, Appendix A. <br /> ' Monitoring wells will be constructed with a screen interval of five to twenty-five feet from the surface. <br /> Soil samples will be collected from the soil borings made for the installation of each monitoring well at a <br /> depth of approximately 15 feet below the surface. One of those soil samples will be tested to determine <br /> ' the permeability of site soils. <br /> 7.0 BORINGS AND WELL INSTALLATION FIELD PROCEDURES <br /> ' 7.1 MONITORING WELL INSTALLATION FIELD PROCEDURES <br /> Three two-inch diameter monitoring wells will be installed. The monitoring well borings will be drilled <br /> ' using an eight-inch O.D. continuous-flight hollow-stem auger. Drilling activities will be performed under <br /> the supervision of a Condor geologist in accordance with the provisions of the SJCEHD permits. The soil <br /> samples will be logged according to the Unified Soil Classification System(USCS). Geologic logs will be <br /> prepared containing field observations including soil type and the presence of staining or odor. Soil <br /> samples will be collected from the borings for laboratory analyses based on field observations and <br /> planned collection depths. The soil cuttings will be placed in 55-gallon drums, sealed, labeled, and left on <br /> Site to await disposal pending results of the laboratory analyses. Soil samples will be collected from the <br /> ' drill cuttings for the purpose of characterizing the cuttings for disposal. All down-hole drilling equipment <br /> will be steam-cleaned prior to use at each location. The drill cuttings and steam cleaning effluent will be <br /> placed in DOT-approved 55-gallon drums, sealed, labeled, and left on Site. Disposal of hazardous <br /> ' materials, if any, will be the responsibility of the property owner. <br /> CONDOR <br />