New Search
Matt Rodrigues <br />Proposed Amendment for a Geophysical Survey and Sal Sampling at 13th Avenue and High Street, Eugene, OR <br />December 10, 2009 <br />Page 2 of 4 <br />surrounding the tank footprint. Four samples will be collected at the maximum depth of excavation for the <br />repaving project, and four samples will be collected at the maximum depth of the tank excavation. In the event <br />,that groundwater is encountered in the when advanced to the maximum depth, PBS will collect up to four water <br />samples. The soil samples will be collected and visually examined and described for lithology and evidence of <br />contamination. <br />PBS will develop a traffic control plan for the fieldwork to install and decommission the borings including <br />appropriate signs, cones, and fiaggers if needed. PBS assumes that the City will turn the signal off if work is <br />.indicated to take place in the intersection <br />All-soil and water samples will be stored in anced container for delivery to the laboratory under chain-of=custody <br />documentation. Upon completion of sampling, the. borings will be backfilled with granular bentonite and the <br />surface sealed to match surroundings. <br />Soil or-water sampling wastes having field indications of contamination will be placed into a small sealed <br />container. PBS will store the waste and characterize it for disposal. PBS assumes that this waste will not=be <br />determined to be hazardous. Cost for hauling and disposal" of hazardous waste is not included in this proposal. <br />Laboratory Analysis <br />'The.four shallowsoilsamples collected will be~analyzedfor petroleum hydrocarbons (total petroleum <br />hydrdcarbon - hydrocarbon identification) by Northwest Method NVIFTPH-HCID, and-for volatile organic <br />:compounds (VOCs) by. EPA Method 8260B. to the event contamination is-'detected °in the soil, follow up analysis <br />maybe recommended on the four shallow samples and the remaining samples collected at the site. Possible <br />.follow-up analyses are included as contingencies in the cost estimate and include: <br />NWTPH-Gx (Quantify gasoline in soil) <br />• NWTPH=Dx (Quantify diesel in soil) <br />• EPA 8260131VOCs and BTEX) <br />• EPA 8270`SIM, (Semi Volatiles and Poly Aromatic' Hydrocarbons) <br />• EPA 6010`(RCRA 8` Metals) <br />• EPA 8082 (PCBs in waste oil) <br />LIMITATION OF SCOPE <br />'The findings and conclusions of the report are not scientific certainties, but rather probabilities based on <br />professional judgment concerning the significance of the data:gathered during the course of the study. PBS is not <br />able to representthat additional tanks or other,underground features are present outside the survey area. The <br />ability to accurately address the environmental risk associated with :a chemical release is .beyond the. scope of this <br />study. <br />