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Second Quarter 2017 Site Investigation Data Report Former Ivy’S Jiffy Market Site Madras, Oregon ECSI No

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Second Quarter 2017 Site Investigation Data Report Former Ivy’S Jiffy Market Site Madras, Oregon ECSI No Second Quarter 2017 Site Investigation Data Report Former Ivy’s Jiffy Market Site Madras, Oregon ECSI No. 5845 Prepared for: Oregon Department of Environmental Quality Task Order No. 20-13-21 June 27, 2017 2103-00/Task 4 Table of Contents 1.0 INTRODUCTION ..................................................................................................................................... 1 1.1 Purpose ............................................................................................................................................... 1 1.2 Scope of Work ..................................................................................................................................... 1 2.0 BACKGROUND ....................................................................................................................................... 2 2.1 Site Location and Description .............................................................................................................. 2 2.2 Previous Investigations ........................................................................................................................ 2 2.3 Other Impacted Sites ........................................................................................................................... 4 2.4 Geology and Hydrogeology ................................................................................................................. 5 3.0 PRE-INVESTIGATION ACTIVITIES ........................................................................................................ 6 4.0 FIELD ACTIVITIES AND FINDINGS ........................................................................................................ 7 4.1 Groundwater Monitoring ...................................................................................................................... 7 4.2 Soil Vapor Monitoring .......................................................................................................................... 8 4.3 SVE System Operation ........................................................................................................................ 8 5.0 CHEMICAL ANALYSES AND RESULTS ................................................................................................ 9 5.1 Analyses Performed ............................................................................................................................ 9 5.2 Chemical Results and Observations.................................................................................................... 9 6.0 RISK-BASED SCREENING ................................................................................................................... 11 6.1 Analytical Data and Risk-Based Screening: Groundwater................................................................ 11 6.2 Analytical Data and Risk-Based Screening: Soil Vapor .................................................................... 11 6.3 Air Discharge Risk-Based Screening and Compliance ...................................................................... 11 7.0 CONCLUSIONS AND RECOMMENDATIONS ...................................................................................... 12 7.1 Recommendations for Additional Work ............................................................................................. 12 8.0 REFERENCES ...................................................................................................................................... 13 Tables 1 Groundwater Elevations and Field Parameters 2 Groundwater Sample Analytical Results 3 SVE System Monitoring 4 SVE System Analytical Results 5 Soil Vapor Analytical Results Figures 1 Site Location Map 2 Site and Exploration Plan 3 Groundwater Elevations 4 Petroleum Hydrocarbons in Groundwater Second Quarter 2017 Site Investigation Data Report Page i Former Ivy’s Jiffy Market Site, DEQ Task Order No. 20-13-21 June 27, 2017 2103-00/Task 4 Appendix A Laboratory Analytical Report and Data Quality Review Second Quarter 2017 Site Investigation Data Report Page ii Former Ivy’s Jiffy Market Site, DEQ Task Order No. 20-13-21 June 27, 2017 2103-00/Task 4 1.0 Introduction This Site Investigation Data Report (Report) describes the field activities and presents the results of the groundwater sampling completed in May 2017 at the former Ivy’s Jiffy Market site located at 40 NW Fourth Street in Madras, Oregon (the Site). This work was done subsequent to the initiation of the Corrective Action activities (discussed in the Corrective Action Implementation Report; Apex, 2016), and was done in accordance with the Site Investigation Work Plan (Apex, 2014b) and the Supplemental Site Investigation Work Plan (Apex, 2014c). This work was conducted for the Oregon Department of Environmental Quality (DEQ) under Task 4 of Task Order No. 20-13-21. 1.1 Purpose The purpose of this work was to obtain additional chemical constituent data (from groundwater and soil vapor at and near the Site) that can be used to assess potential risks posed by the Site to human health and the environment, and to document the effectiveness of the Corrective Action system that began operation in June 2016. 1.2 Scope of Work The scope of work included in the Work Plan consisted of the following tasks: 1) Implement quarterly groundwater monitoring and separate-phase petroleum hydrocarbon (SPH) recovery (measurement of water and SPH levels in each of 18 groundwater monitoring wells, collection of groundwater samples from wells without SPH, and removal of SPH from wells); 2) Analyze collected groundwater samples for total petroleum hydrocarbons (TPH) as gasoline (TPHg) and volatile organic compounds (VOCs); 3) Continue operation of the corrective action soil vapor extraction (SVE) system, including periodic system sample collection and analysis; 4) Periodic soil vapor sampling; and 5) Prepare a data summary report that discusses the monitoring activities, analytical results and findings, system operation, and an evaluation of potential risk based on investigation results. These activities are discussed in further detail within this report. Second Quarter 2017 Site Investigation Data Report Page 1 Former Ivy’s Jiffy Market Site, DEQ Task Order No. 20-13-21 June 27, 2017 2103-00/Task 4 2.0 Background This section presents a description of the Site, the anticipated geology and hydrogeology, and previous work done at the Site. Historical information was obtained from the Environmental Site Investigation report previously prepared for the Site (Osprey, 2009). 2.1 Site Location and Description The Site is in the City of Madras in the northwest corner of the intersection of Fourth Street (Hwy 26/97) and “B” Street, at an elevation of approximately 2,238 feet above mean sea level (MSL; Figures 1 and 2). The Site is located in the SE 1/4 of the SE 1/4 of Section 2 of Township 11 South, Range 13 East, Willamette Meridian, in Jefferson County, Oregon (tax lots 1300 and 1302). The Site is bounded to the north by a Carson Oil Company CFN Card Lock, to the east by Fourth Street and a former car dealership and service station (Opportunity Foundation property), to the south by “B” Street and a motel (Best Western Madras Inn), and to the west by a mobile home park (Willow Creek Mobile Home Park [Willow Creek]). The Site was developed as a market in 1963. Fuel tanks and associated equipment were added in 1982 (including one 10,000-gallon underground storage tank [UST] and one 12,000-gallon UST). The tanks were decommissioned in 1998 and the property continued to be used as a market until about 2003 when the property was converted for use as a used vehicle sales lot. 2.2 Previous Investigations The following environmental assessments and UST removal actions have occurred at the Site. • In May 1991, a line failure was identified in the delivery line to the regular gasoline fuel pump. Several cubic yards of petroleum-impacted soil were removed under DEQ oversight and the delivery lines from each of the fuel tanks were replaced with new fiberglass lines. • In December 1997, soil impacted by petroleum hydrocarbons was discovered during a subsurface geoprobe investigation. Nine explorations were completed, and four samples collected from the vicinity of the USTs were impacted by up to 1,500 milligrams per kilogram (mg/kg) of total TPHg. Samples collected from along the northern and easterly property boundaries (at depths of 13 feet below ground surface [bgs]) had no detected concentrations of TPH. • Between January and March 1998, two USTs and associated infrastructure were decommissioned by removal. A total of about 659 tons of petroleum-impacted soil was removed from the Site and disposed of. The impacted soil was encountered between the depths of 13 and 20 feet bgs (the depth of the groundwater table at the time of the excavation). The excavation was backfilled in May/June 1998 (with a layer of visqueen sheeting placed as an excavation demarcation layer). • In January 1999, six borings (IB1 through IB6) were advanced to depths ranging from 21 to 32 feet bgs. Petroleum impacts were detected in the three boring locations nearest the northern property boundary (at depths ranging from 19.5 to 31 feet bgs), with concentrations generally Second Quarter 2017 Site Investigation Data Report Page 2 Former Ivy’s Jiffy Market Site, DEQ Task Order No. 20-13-21 June 27, 2017 2103-00/Task 4 increasing with depth. Four groundwater monitoring wells were installed during this investigation (MW-1 through MW-4), with screens extending
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