Preparatory Activities

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1 March 1, 2017 Ms. Katie Robertson Oregon Department of Environmental Quality 800 SE Emigrant, Suite 330 Pendleton, Oregon Re: Monitoring Well MW 25 Abandonment Fashion Cleaners Site (ECSI #1004) 623 Klamath Avenue Klamath Falls, Oregon /Task 2 Dear Ms. Robertson: This letter summarizes the abandonment of monitoring well MW 25 at the Fashion Cleaners site near the intersection of Klamath Avenue and 6th Street in Klamath Falls, Oregon (Figure 1). Abandonment activities were conducted on September 26, 2016, and included abandoning MW 25 by overdrilling in anticipation of building upgrades at the Kern Building adjacent to the former dry cleaner property (Figure 2). All work was completed for the Oregon Department of Environmental Quality (DEQ) under Task Order Preparatory Activities Hart Crowser conducted a competitive bid solicitation for private utility locating, well abandoning, and for picking up and disposing of investigation derived waste (IDW). Based on cost and the ability to complete work within the required timeframe, the following subcontractors were selected: APS Locates of Portland, Oregon, to perform private utility locates at the abandonment location; Stratus Corporation (Stratus) of Gaston, Oregon, for abandonment of MW 25; and Waste Management of Portland, Oregon, to pick up and dispose of the IDW. Access to the well location was granted by an access agreement that DEQ has with the affected property owner. Abandonment Activities Well abandonment activities, including mobilization to the site, occurred on September 26, 2016, and were completed within one day. Monitoring well MW 25 was abandoned by overdrilling by Stratus, an Oregon licensed driller, in accordance with OWRD regulations (Oregon Administrative Rule ). A copy of the decommissioning log is presented in Attachment A. Photographs of the abandonment activities are included in Attachment B SW Macadam Avenue, Suite 100 Portland, Oregon Fax Tel

2 Oregon Department of Environmental Quality /Task 2 March 1, 2017 Page 2 Hart Crowser arrived on site the morning of September 26th with APS Locates to perform underground utility location in the area around MW 25 prior to abandonment activities. Abandonment by overdrilling consisted of removing the flush mounted monument and pulling the well riser casing and well screen from the ground (Photographs 1 and 2). Upon casing and screen removal, the well bore was overdrilled using a push probe drill rig with an auger head attachment to 27 feet below ground surface (bgs; Photograph 3). Hydrated bentonite chips were used to backfill the hole to approximately 2 feet bgs. Concrete was then placed on over the bentonite as a surface seal from 2 feet bgs to approximately 4 inches bgs, where asphalt patch was used to complete the backfilling to match the surrounding surfaces (Photograph 4). Investigation derived waste (IDW), including well casing, concrete, steel monument, bentonite/concrete bags, and personal protective equipment, was disposed of by Stratus as solid waste. Additional IDW generated during abandonment activities included approximately 7 cubic feet of soil cuttings generated during overdrilling and approximately 50 gallons of decontamination water. This IDW was containerized in two separate, labelled 55 gallon drums and stored on the site. Because tetrachloroethylene was detected at the site, a review of analytical data from the IDW samples was conducted. Based on the results, the DEQ issued a No Longer Contained In Determination on November 14, 2016, allowing the soil and decontamination water to be disposed of as non hazardous waste. The IDW was picked up on January 5, 2017, and delivered to Waste Management s disposal facility on January 31, The No Longer Contained In Determination and final disposal receipt are provided in Attachment C. Limitations Work performed by Hart Crowser for this project and in preparation of this letter was conducted in accordance with generally accepted professional practices in the same or similar localities, related to the nature of the work accomplished at the time our services were performed. This letter is for specific application to the referenced project and for the exclusive use of the DEQ. No other warranty, express or implied, is made. If you have any questions regarding this letter, please feel free to contact us. Sincerely, HART CROWSER, INC.

Oregon Department of Environmental Quality 150 001 051/Task 2 March 1, 2017 Page 3 ANTHONY CHAVEZ, RG Task Order Manager RICHARD D.

3 Oregon Department of Environmental Quality /Task 2 March 1, 2017 Page 3 ANTHONY CHAVEZ, RG Task Order Manager RICHARD D. ERNST, RG Program Manager Attachments: Figure 1 Vicinity Map Figure 2 Site Plan Attachment A Decommissioning Log Attachment B Photograph Log Attachment C IDW Disposal Documentation cc: Steve Campbell, DEQ (Headquarters)

$Washington Portland OREGON Idaho Klamath Falls California Nevada Document Path: F:\Notebooks\150001051_DEQ Well Abandonments-Multiple Sites\GIS\T2-FashionCleaners\150001051T2_Fashion_Vmap.$

4 Washington Portland OREGON Idaho Klamath Falls California Nevada Document Path: F:\Notebooks\ _DEQ Well Abandonments-Multiple Sites\GIS\T2-FashionCleaners\ T2_Fashion_Vmap.mxd Date: 2/1/2017 User Name: melissaschweitzer 0 1,000 2,000 4,000 Feet Sources: Esri, HERE, DeLorme, TomTom, Intermap, increment P Corp., GEBCO, USGS, FAO, NPS, NRCAN, GeoBase, IGN, Kadaster NL, Ordnance Survey, Esri Japan, METI, Esri China (Hong Kong), swisstopo, MapmyIndia, OpenStreetMap contributors, and the GIS User Community N Project Location Fashion Cleaners Site Klamath Falls, Oregon Vicinity Map /17 Figure 1

5 File: F:\Notebooks\ _DEQ Well Abandonments-Multiple Sites\CAD\T2-FashionCleaners\ T2-Fashion_MWLocs.dwg Layout:WellAbandon Date: Author: melissaschweitzer Mueller Building Former Unocal Site MW-25 MW-15 MW-9 MW-13 MW-12 LEGEND MW-27 MW-10 West Sump MW-18 6th Street Kern Sump S-2 MW-14 Mueller Sump Kern Sump S-1 Kern Building MW-5 MW-1 MW-6 MW-2 MW-8 Antique Building Sump S-1 MW-28 MW-10 MW-19C MW-4 MW-24 MW-26 MW-23 MW-26D MW-22 MW-3 MW-19A MW-7 MW-18 Antique Building Sump S-2 MW-25D MW-19B West Sump KOTI TV Building MW-21 MW-20 East Sump KOTI Parking Monitoring Well Decommissioned (September 2016) Intermediate Monitoring Well Shallow Monitoring Well Sump Monitoring Well Decommissioned (May 2015) Scale in Feet MW-25 Former Fashion Cleaners Boundary 7th Street MW-27 MW-16 Public Parking Parking Walnut Avenue Main Street Fashion Cleaners Site Klamath Falls, Oregon Site Plan Klamath Avenue US Bank Drive-Through /17 Figure 2

6 ATTACHMENT A Decommissioning Log /Task 2 March 1, 2017

7 STATE OF OREGON MONITORING WELL REPORT (as required by ORS & OAR ) KLAM /21/2016 WELL I.D. LABEL# L 4437 START CARD # Page 1 of 2 (1) LAND OWNER Owner Well I.D. MW-25 First Name Last Name Company FASHION CLEANERS Address 623 KLAMATH AVE City KLAMATH FALLS State OR Zip (2) TYPE OF WORK New Deepening Alteration (repair/recondition) Abandonment Conversion (3) DRILL METHOD Rotary Air Rotary Mud Cable Hollow Stem Auger Cable Mud Reverse Rotary Other (4) CONSTRUCTION Depth of Completed Well ft. Special Standard MONUMENT/VAULT From To Piezometer Well (6) LOCATION OF WELL (legal description) County KLAMATH Twp S N/S Range 9.00 E E/W WM Sec 32 NW 1/4 of the NE 1/4 Tax Lot 4900 Tax Map Number Lot Lat ' " or DMS or DD Long ' " or DMS or DD Street address of well Nearest address 623 KLAMATH AVE KLAMATH FALLS, OR (7) STATIC WATER LEVEL Date SWL(psi) SWL(ft) Existing Well / Predeepening Completed Well Flowing Artesian? Dry Hole? WATER BEARING ZONES Depth water was first found SWL Date From To Est Flow SWL(psi) + + SWL(ft) BORE HOLE Diameter From 0 To 27 CASING Dia. Gauge Material From Steel To Wld Thrd Plastic (8) WELL LOG Ground Elevation concrete bentonite chips Material From 0 2 To 2 27 LINER Dia. Gauge Material From Steel To Wld Thrd Plastic SEAL From Material Amount To Grout weight FILTER From To Material Size of pack (5) WELL TESTS Yield gal/min Drawdown Drill stem/pump depth Duration (hr) Temperature Supervising Geologist/Engineer Water quality concerns? From To SCREEN Casing/Liner Diameter From To Slot Size F Lab analysis Yes By Yes (describe below) Description Material Pump Bailer Air Flowing Artesian Amount Units Date Started 9/26/2016 Completed 9/26/2016 (unbonded) Monitor Well Constructor Certification I certify that the work I performed on the construction, deepening, alteration, or abandonment of this well is in compliance with Oregon monitoring well construction standards. Materials used and information reported above are true to the best of my knowledge and belief. License Number Date 10/21/2016 Password : (if filing electronically) Signed LARS-ERIC LJUNGQVIST (E-filed) (bonded) Monitor Well Constructor Certification I accept responsibility for the construction, deepening, alteration, or abandonment work performed on this well during the construction dates reported above. All work performed during this time is in compliance with Oregon monitoring well construction standards. This report is true to the best of my knowledge and belief. License Number 1537 Date 10/21/2016 Password : (if filing electronically) Signed SCOTT FLAHERTY (E-filed) Contact Info (optional) Scott Flaherty ORIGINAL - WATER RESOURCES DEPARTMENT THIS REPORT MUST BE SUBMITTED TO THE WATER RESOURCES DEPARTMENT WITHIN 30 DAYS OF COMPLETION OF WORK Form Version:

8 ATTACHMENT B Photograph Log /Task 2 March 1, 2017

9 Photograph 1 Photograph shows monitoring well MW 25 after the flush mounted monument was removed. The top of the PVC well casing is visible within the hole. Photograph taken facing south. Photograph 2 Photograph shows the PVC well casing and well screen being removed prior to overdrilling. Photograph taken facing southwest /Task 2 March 1, 2017

Photograph 4 Photograph shows the asphalt patch over the MW 25 abandonment site.

10 Photograph 3 Photograph shows overdrilling using the auger attachment on the push probe drill rig. Photograph taken facing south. Photograph 4 Photograph shows the asphalt patch over the MW 25 abandonment site. IDW drums can be seen along the building pending disposal. Photograph taken facing northwest /Task 2 March 1, 2017

11 ATTACHMENT C IDW Disposal Documentation /Task 2 March 1, 2017

November 30, 2017

November 30, 2017 Post Office Box 151 Bakersfield, CA 9332 Tel: (661) 616-65 Fax: (661) 616-655 November 3, 217 Pamela Creedon, Executive Officer Central Valley Regional Water Quality Control Board 1685 E Street Fresno,