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Home My WebLink AboutKUM & GO #0951 - FDP230009 - SUBMITTAL DOCUMENTS - ROUND 1 - ENVIRONMENTAL REPORT (2) FUEL SYSTEMS | GENERAL CONTRACTING | ENVIRONMENTAL SERVICES | WASTE SOLUTIONS ENERGY SOLUTIONS | AUTOMOTIVE & COMMERCIAL EQUIPMENT 200 S. RARITAN STREET DENVER, CO 80223 PHONE: 303-744-2125 DENVER BRANCH WWW.SENECACO.COM STORE.SENECACO.COM November 8, 2022 Mr. Erica Morton Olsson 1880 Fall River Drive, Ste. 200 Loveland, CO 80538 RE: Proposed Kum and Go #0951 Recognized Environmental Concerns and Remediation Plans Ms. Morton, Following Seneca Environmental Services’ due diligence and site characterization activities at the proposed Kum & Go #0951 located at the southwest corner of E. Prospect Road and S. Lemay St., Fort Collins, CO, and at the request of the City of Fort Collins Environmental Planning Department, the following plans have been prepared to address various recognized environmental concerns during site redevelopment. 1. Asbestos The three existing structures planned for demolition will require varying levels of permitted asbestos mitigation by a Colorado licensed asbestos abatement contractor prior to demolition activities. PLAN  947 E. Prospect ‐ Removal and disposal of 1,075 square feet of Asbestos Containing Drywall texture located in the living room, south center room and west bedroom, 25 square feet sheet vinyl located at the front entry, 138 square feet of 12 x 12 floor tile located in the laundry room, 145 square feet of 12 x 12 floor tile and sheet vinyl flooring located in the kitchen, 100 square feet of thermal system insulation located in the attic and the utility closet, 2,000 square feet of cementitious paneling located on the exterior of the building, and 10 linear square feet of cementitious piping located in the south center room closet prior to demolition from the interior of building 949 East Prospect Road. In addition, removal and disposal of 1,500 square feet of black tar roofing material if deemed friable.  949 E. Prospect ‐ Removal and disposal of 1,653 square feet of drywall joint compound, 1,350 square feet of cinderblock coating located on the interior of the garage, 10 square feet of window glazing located on 3 windows in the garage, and 850 square feet of cinderblock coating located on the exterior of the garage prior to demolition from the building 949 East Prospect Road. The asbestos containing material will be removed within a full containment. In addition, removal and disposal of 1,247 square feet of black tar roofing material if deemed friable.  1607 S. Lemay – Removal and disposal of 52 square feet of thermal system insulation located in the basement prior to demolition from the interior of building 1607 South Lemay Avenue. The asbestos containing material should be removed within a secondary containment. FUEL SYSTEMS | GENERAL CONTRACTING | ENVIRONMENTAL SERVICES | WASTE SOLUTIONS ENERGY SOLUTIONS | AUTOMOTIVE & COMMERCIAL EQUIPMENT 200 S. RARITAN STREET DENVER, CO 80223 PHONE: 303-744-2125 DENVER BRANCH WWW.SENECACO.COM STORE.SENECACO.COM 2. Petroleum and Hydraulic Oil Impacted Soil Following decades of the subject property operating as a gasoline and service station, shallow petroleum and hydraulic oil impacted soil is expected to be encountered during the site demolition and grading process. The Phase II ESA dated June 7, 2021, identified soil contamination greater than the Colorado Division of Oil and Public Safety Tier I Risk Based Screening Levels (RBSLs) adjacent east of the southernmost fuel dispenser (SB‐1) at 4’ below ground surface (bgs). Consequently, Release Event ID#14088 was reported to the Colorado Division of Oil and Public Safety (OPS). Under the oversight of OPS, the extent of soil impact was characterized identifying soil impact greater than RBSLs from samples SB‐03@10’ and SB‐08@8’ collected adjacent south of the northmost fuel dispenser. Please refer to the attached data maps. Soil impacted with hydraulic oil are likely to be encountered below the south garage bay following demolition due to long use of hydraulic auto lifts. Samples collected nearby down to 9 feet in depth resulted in concentrations of oil and grease greater than state corrective action levels. Following removal of the hydraulic lifts and depending on severity of impact, it may be possible the impacted soils can be reused on site so long as they stay on site. Otherwise, impacted soils destined for export will need to be profiled and disposed at a landfill. Approximately 55 cubic yards of potentially impacted soil will be excavated, loaded, hauled, disposed at a permitted landfill (Waste Management in Ault, CO) and backfilled with clean import. PLAN – An environmental consultant will prepare a Material Management Plan (MMP) and a Non‐ Hazardous Waste Disposal Profile prior to redevelopment. The MMP will identify best management practices to be implemented during the handling of petroleum or hydraulic oil contaminated materials, including an environmental technician screening out clean soil from dirty soil during excavation using a calibrated photoionization detector and use of visual observations, stockpiling and protection of impacted material (i.e. silt fencing or straw waddles around the stockpile and plastic covering to limit off site migration of contaminated sediments or runoff and vapor migration respectively), and to address safety concerns in regards to site workers and the general public such as vapor control and prevention of contaminated soil from being carried off site by vehicles i.e. rip rap exit pad. All petroleum impacted soil not able to be reused on site will be disposed of offsite under manifest at thew Waste Management facility in Ault, CO as Resource Conservation and Recovery Act (RCRA) regulated waste. 3. UST Removal Three X 6,000‐gallon steel USTs and two dispensers are currently in‐use at the Subject Property. The USTs will need to be removed as part of redevelopment. A 10‐Day Notice of Intent to Remove Underground Storage Tanks will need to be submitted to OPS, and a permit will be acquired from the Fort Collins Fire Department and/or Building Department prior to removal. Each tank will need to have all fuel removed by a vacuum truck, cleaned and waste fluids disposed at a permitted disposal facility (ACI Services in Englewood, CO). All fuel lines will need to have residual fuel removed. The tanks will then need to be purged of hazardous atmospheres with dry ice or compressed nitrogen before removal may occur to eliminate the explosion hazard during removal. The fuel lines, vent lines, dispensers and tanks will then FUEL SYSTEMS | GENERAL CONTRACTING | ENVIRONMENTAL SERVICES | WASTE SOLUTIONS ENERGY SOLUTIONS | AUTOMOTIVE & COMMERCIAL EQUIPMENT 200 S. RARITAN STREET DENVER, CO 80223 PHONE: 303-744-2125 DENVER BRANCH WWW.SENECACO.COM STORE.SENECACO.COM be removed by an experienced UST removal contractor and properly disposed or recycled as appropriate. Following removal of the tanks, soil and groundwater samples will be collected per OPS guidelines to assess the post removal environmental conditions and a tank closure report will need to be submitted to OPS within 30 days of removal. Additional petroleum contamination may be present within the UST basin that requires mitigation. Over excavation of the impacted material and/or removal of free phased floating product via vacuum truck may be warranted. Over excavation activities will follow the MMP discussed in item #2. Depending on the severity of the level of petroleum impact within the UST basin, it may be necessary to apply a slurry of BOS 200® remediation compound developed by Remediation Products Inc., within the former tank basin while it is open. BOS 200® is a carbon‐based compound that traps hydrocarbon contaminants and is formulated with oxidants and bacteria which help with the degradation of hydrocarbons; hence the BOS 200® copyrighted term “Trap and Treat”. The compound is mixed with water and is injected into the subsurface or sprayed into an excavation as slurry within the soil and into the groundwater. The excavation will then be backfilled with clean overburden and/or building grade import and compacted to specifications. Monitoring wells will likely be installed in and around the former UST basin to monitor remediation progress on a quarterly basis and reported to OPS on a semi‐annual basis. 4. Dewatering A shallow water table (~7‐10 feet bgs) and porous lithology will require dewatering of the area water table to install the new fiberglass USTs, approximately 200 feet southwest of the existing UST basin. Phase II and site characterization sampling results suggest the potential for dissolved benzene and oil / grease concentrations to be drawn in by the dewatering pumping process and potentially exceed surface water permit discharge thresholds of 0.002 mg/L and 10 mg/L respectively. PLAN Apply for a Short‐Term Remediation ‐ National Pollutant Discharge Elimination System (NPDES) Permit (COG317000) through the Colorado Department of Public Health and Environment, Water Quality Control Division. Drill and install 4 large diameter (~12”) PVC screened casing to 30 feet in depth outside the expected UST excavation area, install 2 or 3‐inch submersible pumps with float switches hard wired into a generator, plumb each pump with lay flat fire hose to a manifold attached to a 21,000‐gallon environmental certified clean frack tank for sediment settling and possible flocculant mixing. With a 3‐inch trash pump, run the discharge through a sediment bag filtration unit then through an activated carbon vessel, consistently monitor the discharge for breakthrough, collect samples per permit requirements and report the discharge to the NETDMR portal on a monthly basis until the work is completed at which time the permit will be terminated. Once the USTs are set within the excavation, they will be ballasted with clean hydrant water and backfilled with pea gravel at which point the dewatering pumping may cease, pumps and equipment removed from site and the well are casings removed from the ground. The ballast water will be sampled from each tank and/or compartment and analyzed for Volatile Organic Compounds (VOCs). A formal request will be made with the city of Fort Collins for authorization to discharge the ballast water into the sanitary sewer. Conditional approval may be granted based FUEL SYSTEMS | GENERAL CONTRACTING | ENVIRONMENTAL SERVICES | WASTE SOLUTIONS ENERGY SOLUTIONS | AUTOMOTIVE & COMMERCIAL EQUIPMENT 200 S. RARITAN STREET DENVER, CO 80223 PHONE: 303-744-2125 DENVER BRANCH WWW.SENECACO.COM STORE.SENECACO.COM on additional sampling results and/or pump rate and time of day limitations as to not over surge the facility. If that authorization is not granted, NPDES permit type COG604000 for Hydrostatic Testing of pipelines, tanks and similar vessels will be applied for from CPDHE to treat the ballast water with pH neutral Vitamin C to neutralize the total residual chlorine and discharge the ballast water into the storm sewer. 5. Vapor Intrusion Mitigation The existing USTs are located adjacent north of the proposed C‐Store footprint, meaning petroleum impacted soil and groundwater is likely to be present in the area following removal of the USTs. With groundwater exceeding 5 feet bgs, potential vapor intrusion partitioning off the groundwater and entering the enclosed space of the building foundation is unlikely. However, following removal of the USTs, it may be warranted to install a vapor mitigation barrier below the foundation slab to keep vapors from potentially intruding into the store. 6. Preservation of Existing Monitoring Wells A groundwater sampling event will take place prior to closing the USTs. Prior to site demolition, all seven monitoring wells on site will be protected to the extent possible by lowering them below final grade, locating them with a GPS and raising them back up prior to the new concrete pour which could be approximately 6 months later. Some wells may be destroyed entirely which can be an inevitable consequence of this type of construction activity. Those wells will be replaced as deemed necessary to continue groundwater monitoring after the store is completed. If you have any questions, please contact me at 303‐744‐2125 or mdimino@senecaco.com. Seneca Companies appreciates the opportunity to assist you in this matter. Sincerely, Seneca Companies, Inc. Michael C. Dimino Branch Operations Manager Environmental Services and Waste Solutions Colorado Division of Oil and Public Safety Recognized Environmental Professional #10 E. Prospect Rd.S. Lemay Ave.HospitalAutomotive947 E.ospect Rd.1607 S.Lemay Ave.Great Clip 7-ElevenConocoGasMW-01MW-02MW-04MW-03MW-05MW-06SB-01SB-02SB-03SB-04SB-05SB-06SB-07AGW-03MW-01 @ 10'7/20/2021B - <0.002T - 0.0053E - 0.91X - <0.10TVPH - <0.50MW-02 @ 9'7/20/2021B - 0.016T - <0.005E - 0.65X - <0.010TVPH - 26MW-03 @ 3'7/20/2021B - 0.016T - <0.005E - 0.21X - <0.010TVPH - <0.50MW-04 @ 8'7/20/2021B - 0.0078T - <0.005E - 0.0077X - <0.010TVPH - <0.50MW-05 @ 3'7/20/2021B - <0.002T - <0.005E - <0.005X - <0.010TVPH - 1.7MW-06 @ 10'7/20/2021B - <0.002T - <0.005E - 0.0079X - <0.010TVPH - <0.50SB-01 @ 10'7/20/2021B - <0.002T - 0.17E - 1.1X - <0.010TVPH - <0.50SB-02 @ 11'7/20/2021B - <0.002T - <0.005E - 0.023X - <0.010TVPH - <0.50SB-03 @ 10'7/20/2021B - 0.86T - 20E - 16X - 80TVPH - 2000SB-03 @ 15'7/20/2021B - <0.002T - <0.005E - <0.005X - <0.10TVPH - <0.50SB-04 @ 9'7/20/2021B - 0.021T - 0.024E - 0.17X - <0.010TVPH - <0.50SB-06 @ 11'7/21/2021B - 0.0045T - <0.005E - 0.034X - <0.010TVPH - <0.50SB-05 @ 8'7/20/2021B - 0.079T - <0.005E - 0.1X - <0.010TVPH - <0.50SB-07 @ 9'7/20/2021B - 0.028T - <0.005E - 0.067X - <0.010TVPH - <0.50SB-05 @ 12'7/20/2021B - 0.0045T - <0.005E - 0.034X - <0.010TVPH - <0.50MW-05 @ 15'7/20/2021B - <0.002T - <0.005E - <0.005X - <0.010TVPH - <0.50MW-06 @ 15'7/20/2021B - <0.002T - <0.005E - <0.005X - <0.010TVPH - <0.50SB-06 @ 15'7/21/2021B - <0.002T - <0.005E - <0.005X - <0.010TVPH - <0.50MW-03 @ 9'7/20/2021B - 0.13T - <0.005E - 0.21X - <0.010TVPH - <0.50MW-04 @ 15'7/20/2021B - <0.002T - <0.005E - <0.005X - <0.010TVPH - <0.50SB-04 @ 15'7/20/2021B - <0.002T - <0.005E - <0.005X - <0.010TVPH - <0.50MW-02 @ 15'7/20/2021B - <0.002T - <0.005E - <0.005X - <0.010TVPH - <0.50SB-01 @ 12'7/20/2021B - <0.002T - <0.005E - 0.014X - <0.010TVPH - <0.50MW-01 @ 12'7/20/2021B - <0.002T - <0.005E - <0.005X - <0.10TVPH - 26SB-07 @ 15'7/20/2021B - <0.002T - <0.005E - <0.005X - <0.010TVPH - <0.50ConcreteConcreteSidewalkGrassSidewalkGrassGrassSHEET NO.DATE:DRAWN BY:CHECKED BY:PROJECT NO:SCALE:FILENAME:JOB DESCRIPTION:SHEET TITLE:T h e C o m p l e t e S o l u t i o nDATE:REV. NO.T h e C o m p l e t e S o l u t i o nCompaniesSenecaJ. Stewert9/09/2021Hospital Texaco6363777M. Bare Hospital Texaco949 E. Prospect Rd.Fort Collins, CO 80525EID:140883rd Quarter 2021, Soil Chemistry Map01SWNEREV1REV2REV3REV4REV5REV6This drawing and all parts thereof is the exclusive property of Seneca Companies and may not be reproduced in whole or part without written permission.0'40'LegendProperty Boundary2" Monitoring WellSoil BoringUST Basin E. Prospect Rd.S. Lemay Ave.Hospital Automotive 947 E. ospect Rd. 1607 S. Lemay Ave. Great Clips7-Eleven Conoco Gas MW-01 MW-02 MW-04 MW-03 MW-05 MW-06 SB-01 SB-02 SB-03R SB-04 SB-05 SB-06 SB-07 AGW-03 MW-07 SB-08 SB-09 MW-07 @ 10' 10/4/2021 B - <0.0020 T - <0.0050 E - <0,.0050 X - <0.010 TVPH - <0.50 TEPH - <0.0050 SB-08 @ 3' 10/4/2021 B - <0.0020 T - 0.013 E - 0.15 X - <0.010 TVPH - <0.50 TEPH - <0.0050 SB-03R @ 3' 10/4/2021 B - 0.038 T - 0.028 E - 2.8 X - <0.010 TVPH - <0.50 TEPH - <0.0050 SB-09 @ 8' 10/4/2021 B - 0.11 T - 0.035 E - 1.2 X - <0.010 TVPH - <0.50 TEPH - 0.019 SB-08 @ 8' 10/4/2021 B - 0.44 T - 3.3 E - 4.0 X - <0.010 TVPH - <0.50 TEPH - 0.015 Concrete Concrete Sidewalk Concrete Grass Grass SidewalkGrass SHEET NO. DATE: DRAWN BY: CHECKED BY: PROJECT NO: SCALE: FILENAME: JOB DESCRIPTION: SHEET TITLE: T h e C o m p l e t e S o l u t i o n DATE:REV. NO. T h e C o m p l e t e S o l u t i o n Companies Seneca J. Stewart 11/8/2021 Hospital Texaco 6363777 M. Bare Hospital Texaco 949 E. Prospect Rd. Fort Collins, CO 80525 EID: 14088 4th Quarter 2021, Soil Chemistry MapREV6 REV5 REV4 REV3 REV2 REV1 E N W S 01 0'40' Legend Property Boundary 2" Monitoring Well Soil Boring UST Basin E PROSPECT RD S LEMAY AVEVAN 12 5 T 4 E/T/I SQUARE FOOTAGE: 4,000 CUSTOM-MP-RP-2019V4 PROPOSED LOT 48,685 SF REMAINING LOT 5,466 SF E PROSPECT RD S LEMAY AVEVAN T E/T/I SQUARE FOOTAGE: 4,000 CUSTOM-MP-RP-2019V4 PROPOSED LOT 48,685 SF REMAINING LOT 5,466 SF E PROSPECT RD S LEMAY AVEVAN T E/T/I SQUARE FOOTAGE: 4,000 CUSTOM-MP-RP-2019V4 PROPOSED LOT 48,685 SF REMAINING LOT 5,466 SF SHEET NUMBER: CPM: SDM: RDM: 01/22/2021#0951 - FORT COLLINS, COKG PROJECT TEAM:E. PROSPECT ROAD & S. LEMAY AVENUE1459 Grand Avenue Des Moines, Iowa 50309 P: 515-226-0128 F: 515-223-9873 DATE: TOM CARRICO RYAN HALDER PERRY DEPHILLIPS CALL 811 SEVENTY-TWO HOURS PRIOR TO DIGGING, GRADING OR EXCAVATING FOR THE MARKING OF UNDERGROUND MEMBER UTILITIES.DOCUMENT REVISION DATE: JULY 2013Know what's below. before you dig.CallR CONCEPT PLAN1 OF 1 www.olsson.comTEL 970.461.77331880 Fall River Dr., Suite 200Loveland, CO 80538DATEREVISION DESCRIPTIONDATEDATE: CALL 811 SEVENTY-TWO HOURS PRIOR TO DIGGING, GRADING OR EXCAVATING FOR THE MARKING OF UNDERGROUND MEMBER UTILITIES. Know what's below. before you dig.CallR DELIVERY TRUCK ACCESS (WB-67) FUEL TRUCK ACCESS (WB-50) SITE DATA KUM & GO LOT SIZE 48,685 SF ± 1.118AC ± KUM & GO BUILDING 4,000 SF CANOPY/DISPENSER ARRANGEMENT 4 DISPENSERS (SINGLE) REQUIRED PARKING 21 STALLS PROPOSED STANDARD PARKING 21 STALLS ADA REQUIRED & PROVIDED PARKING 1 STALL FLAG NOTES:EXISTING UST BASIN 3 X 6,000-gallon steel GROUNDWATER FLOW DIRECTION EXISTING DISPENSERS EXISTING SUBSURFACE HYDRAULIC AUTO LIFTS PROPOSED PHASE II ASSESSMENT LOCATIONSSB-1 SB-2 SB-3 SB-4 VP-1 SB-5