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type(s) of petroleum hydrocarbons using NWTPH-Gx for gasoline-range <br /> hydrocarbons and NWTPH-Dx for diesel range organics and heavier (lobe oil) <br /> hydrocarbons <br /> • Environmental Protection Agency (EPA) method 8260 far volatile organic <br /> compounds (VOCs) <br /> • EPA method 8270 for semi-volatile organic compounds (SVOCs} <br /> • EPA method 8270 modified for selective ion monitoring (SIM) for polynuclear <br /> aromatic hydrocarbons (PAHs) for selected samples . if diesel or tube oil type <br /> hydrocarbons are identified in the NWTPH-HCID analysis. <br /> • EPA Method 8081/8482 for organochlorine pesticides and PCBs <br /> • EPA Method 8151 for chlorinated herbicides <br /> Groundwater. , <br /> • NWTPH method NWTPH-Gx for total petroleum hydrocarbons as gasoline <br /> • NWTPH method NWTPH-Dx for diesel range organics and heavier (tube oil) <br /> hydrocarbons <br /> • Environmental Protection Agency (EPA) method 8260 for VOCs <br /> • EPA method 8270 modified far selective ion monitoring (SIM) for potynuclear <br /> aromatic hydrocarbons (PAHs) for selected samples if diesel or Tube oil type <br /> hydrocarbons are identified in the NWTPH-Dx analysis. <br /> • EPA Method•200.7 or 200.8 (or equal) for total cadmium, chromium, and lead if <br /> heavy oil detected in NWTPH-Dx analysis. <br /> • EPA Method 8081/8082 for organochlorine pesticides and PCBs <br /> • EPA Method 8151 for chlorinated herbicides <br /> 1w4 Methane Gas Bafiole Survev <br /> A methane gas bafiole survey will be performed at 10 or more locations within and outside the <br /> footprint of the fill area. The survey will be performed by creating a bafiole void by advancing a <br /> steel rod having a diameter of approximately one (1) inch to a depth of approximately three and one- <br /> hatffeet and then retracting the rod. A section of slotted PVC screen will then be placed in the void. <br /> A combustible gas indicator calibrated to methane will then be used to measure the concentration of <br /> combustible gas, if any, in soil gas entering the bafiole. <br /> 2•~0 GEOTECHNICAI_ ASSESSMENT <br /> A proposal for geotechnical assessment of the site by prepared K & A Engineering, Inc. is attached <br /> to this proposal. <br /> <br /> ~I+'` COE461SC.QSW -PROPOSAL PAGE 4 <br /> FIELD INVESTIGATIVE SERVICES FOR ENVIRONMENTAL AND GEOTECHNICAL ASSESShAENT OF FORMERGRAVEL EXTRACTION SITE <br /> AUGUST 24, 2007 <br /> <br />