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1424 Yankee Doodle Rd - Excavation Report 2022-12-21GENERAL EXCAVATION REPORT WORKSHEET (MPCA GUIDANCE DOCUMENT 3-02) Eagan BP 1424 Yankee Doodle Road Eagan, MN 55121 Carlson McCain Project #10390-00 MPCA Tank #LS0021863 Prepared for: Eagan BP, Inc. Attn: Mr. Elias Saman 1424 Yankee Doodle Road Eagan, MN 55121 December 19, 2022 CARLSON ��1N MCAIN 15650 36TH AVENUE N, SUITE 110 PLYMOUTH, MN 55446 TEL 952.346.3900 FAX 952.346.3901 [If -A 0 14810 181 Leroyw11ilk were] I ENGINEERING \ LAND SURVEYING \ ENVIRONMENTAL MINNESOTA POLLUTION General excavation report worksheet CONTROL AGENCY 520 Lafayette Road North Petroleum Remediation Program 5t. Paul, MN 55155-4194 Guidance document 3-02 Doc Type: General Excavation Report Worksheet Instructions: Do not revise or delete text or questions contained in this report Complete this report to document underground and aboveground petroleum tank removals, closures, and/or upgrades at sites where a petroleum release has been identified and the MPCA has issued a leak site ID, regardless of whether petroleum contaminated soil (PCS) is excavated, and to document excavation and treatment or disposal of PCS performed during tank system removal, closure, and/or upgrade activities. Conduct soil excavation activities in accordance with Excavation of petroleum -contaminated soil and tank removal sampling. If no additional investigation is necessary, email this report and required attachments to the MPCA project manager. If additional investigation is necessary, include this General excavation report worksheet as Appendix C in the Investigation report. Do not complete this report to document excavation of PCS in response to a recent release, after surface soil excavation, or as an MPCA-approved corrective action after a site investigation has been conducted where a tank system hasn't been removed or upgraded as a part of the excavation. Instead, complete the Corrective action excavation report worksheet. Note: All documents with hyperlinks in this form are available on the MPCA's Cleanup guidance website at https://www.pca.state.mn.us/waste/cleanup-quidance. MPCA Site ID: LS0021863 Date (mm/dd/yyyy): 12/19/2022 Responsible party information Individual or corporate name: Eagan BP, Inc. Mailing address: 1424 Yankee Doodle Road City: Eagan Email: Eliasco@comcast.net Alternative contact name (if any): Elias Saman, President Leak site information Name: Eagan BP Leak site address: 1424 Yankee Doodle Road City: Eagan County: Dakota Tank contractor Company name: Service West Contracting, Inc. State: MN State: MN Zip code: 55121 Phone: 612-490-7254 Phone: 612-490-7254 Phone: 612-490-7254 Zip code: 55121 Contact name: Mark Griffiths Mailing address: 1202 State Highway 65 City: Princeton State: MN Zip code: 55371 Email: service.westmn@gmail.com Phone: 612-889-7552 Underground storage tank (UST) certified contractor number: 176 UST certified supervisor number: 2464 https://www.pca.state.mn.us 651-296-6300 800-657-3864 Use your preferred relay service Available in alternative formats c-prp3-02 • 7/14/22 Page 1 of 9 Environmental professional information By signing this document, 1/we acknowledge that we are submitting this document on behalf of and as agents of the responsible person or volunteer for this leak site. 1/we acknowledge that if information in this document is inaccurate or incomplete, it will delay the completion of remediation and may harm the environment and may result in a reduction in Petrofund reimbursement. In addition, 1/we acknowledge on behalf of the responsible person or volunteer for this leak site that if this document is determined to contain a false material statement, representation, or certification, or if it omits material information, the responsible person or volunteer may be found to be in violation of Minn. Stat. § 115.075 or Minn. R. 7000.0300 (Duty of Candor), and that the responsible person or volunteer may be liable for civil penalties. By typing/signing my name below, 1 certify the above statements to be true and correct, to the best of my knowledge, and that this information can be used for the purpose of processing this form. Signatures Report author(s) Signature: Marina Cord (This document has been electronically signed.) Title: Hydrogeologist Date (mm/dd/yyyy): 12/19/2022 Signature: (This document has been electronically signed.) Title: Date (mm/dd/yyyy): Name(s) of field technician(s) Company information Marina Cord Name: Carlson McCain, Inc. Mailing address: 15650 - 36th Avenue North; Suite 110 City: Plymouth Project manager information Name: Chris Loch Phone: 952-346-3913 Report reviewer(s) Signature: Chris Loch (This document has been electronically signed.) Title: Senior Environmental Project Manager Date (mm/dd/yyyy): 12/19/2022 Signature: (This document has been electronically signed.) Title: Date (mm/dd/yyyy): State: MN Email: cloch@carlsonmccain.com Section 1: Site and release information Phone: 952-346-3900 Zip code: 55446 Double click checkboxes to select Checked and select OK. A. Date of release discovery (mm/dd/yyyy): 11/15/2022 Date release reported to the Minnesota duty officer (mm/dd/yyyy): 11/15/2022 1. Was release reported upon discovery in the field? Examples: organic vapor readings above background, visual staining, petroleum odors, free product, or petroleum sheen? ® Yes [-]No 2. Was release reported based on lab results? [-]Yes ® No a. If yes, date lab results received (mm/dd/yyyy): Not applicable (N/A) B. Type(s) of petroleum product released: ® Gasoline, unleaded ® Diesel ❑ Gasoline, leaded ❑ Fuel oil #1 & #2 ❑ Gasoline, type unknown ❑ Fuel oil #4 & #6 C. Volume of the release, if known: Unknown ❑ Motor oil ❑ Used oil ❑ Waste oil gallons ❑ E85 ❑ Kerosene ❑ Hydraulic fluid ❑ Aviation gas ❑ Jet fuel ❑ Unknown https://www.pca.state.mn.us 651-296-6300 800-657-3864 Use your preferred relay service Available in alternative formats c-prp3-02 • 7/14/22 Page 2 of 9 D. Dates site work performed. Identify when the tank(s), piping and/or dispensers were removed, closed in place, or replaced, contaminated soil was excavated and stockpiled onsite, soil borings performed, and when contaminated soil was transported to soil disposal facility. To add additional rows, press tab. Date Work performed (mm/dd/yyyy) Service West Contracting (SWC) and Carlson McCain, Inc. (Carlson McCain) were on -Site for Underground storage tank (UST) system removal and sampling activities. A total of three 12,000 gallon USTs, six dispensers, associated piping and the canopy were removed from the Site. Soil samples were collected below each end of the removed USTs and below each removed fuel dispenser for field screening purposes. Soil samples collected below the removed USTs were submitted to Eurofins Laboratory (Eurofins) for diesel range organics (DRO) and/or gasoline range organics (GRO) and petroleum volatile organic compounds (PVOCs) analysis. Based on field 11/15/2022 screening and photoionization detector (PID) readings of soil samples collected from below the former dispensers, the responsible party intended to proceed with grossly impacted soil excavation throughout the former fuel dispenser area. Samples collected beneath the removed fuel dispensers were not submitted to the laboratory at this time. Impacted soil was subsequently reported to the Minnesota Duty Officer (DO Report #209673). Laboratory analytical reports are included in Appendix B. SWC and Carlson McCain were on -Site for grossly petroleum impacted soil excavation and confirmatory sampling activities. Approximately 552 cubic yards (773.03 tons) of petroleum impacted soil was removed from below and around the former fuel dispensers and transported to Dem -Con Landfill (DemCon) for disposal. Field screening was conducted to decipher clean vs grossly impacted during soil excavation. The MPCA approved the excavation of up to 500 cubic 11/30/2022 yards of impacted soil on November 30, 2022. A total of six confirmation soil samples were collected through from the excavation basin bottom (below each former dispenser location), for potentially confirming 12/02/2022 the vertical extent(s) of soil contamination. In addition, a total of eight soil samples were collected along the excavation basin sidewalls to potentially provide horizontal soil contamination definition. Confirmatory soil samples were submitted to Eurofins for DRO, GRO and PVOC analysis. Impacted soil approval, weight totals and waste manifests are included in Appendix C. E. List the names and title of others on-site during site work, such as the fire marshal, local officials, MPCA staff. N/A Describe the site, such as current land use, occupancy of buildings, and onsite features. The Eagan BP (Site) is located at 1424 Yankee Doodle Road in Eagan, MN (Figure 1). The Site was developed as a gas station with a convenience store. All property structures associated with the former gas station have been removed from the Site, including the convenience store. The former fuel dispenser canopy and a total of six fuel dispensers were located to the west of the former Site building, which was located along the east side of the property. The former USTs were buried below a concrete surface, located to the northwest of the Site building. The former USTs, fuel dispensers, canopy and Site building are shown on Figure 2, attached. G. Describe the general land use and pertinent geographic features within 1,000 feet of the site, such as residential/industrial/ commercial property, surface water, etc. The Site is adjoined by commercial property to the east (Dunkin' Donuts), Yankee Doodle Road followed by commercial shopping centers and parking lots to the north; Washington Drive followed by commercial property (strip mall) to the west; and 811t Street followed by commercial property (Holiday Inn hotel) to the south. The nearest observed surface water feature is a retention pond located approximately 860 feet to the northwest from the former fuel dispensers. H. What is the source of the onsite drinking water supply? ® Municipal ❑ Private Well ❑ None ❑ Other If other, describe: N/A I. Is there evidence of surficial soil contamination? ❑ Yes ® No If yes, describe: N/A J. Is contamination present from previous petroleum releases on-site? ® Yes ❑ No https://www.pca.state.mn.us c-prp3-02 • 7/14/22 Closed leak -sites #LS0006964 & #LS0013812 • 651-296-6300 800-657-3864 Use your preferred relay service Available in alternative formats Page 3 of 9 If yes, list previous MPCA Site IDs: LS0006964 (Amoco Ss #7392): A petroleum release was discovered on November 8, 1993. A remedial investigation (RI) was conducted and 100 cubic yards of impacted soil was excavated. Impacts to groundwater were not documented. The MPCA closed the Leak -Site on June 7, 1995. • LS0013812 (Amoco Ss #7392): A gasoline release was discovered on December 6, 2000. Impacts to groundwater were not documented. The MPCA closed the Leak -Site on June 5, 2001. Section 2: Excavation information A. Dimensions of excavation basin(s). Include excavation boundaries in Figure 3. To add additional rows, press fab. Basin (#1, #2, etc.) Length (ft) Width (ft) Depth (ft) #1 (former UST basin) 33' 33' 13' #2 (impacted soil excavation/fuel dispenser 70' 40' Between 4.5' & 7' area) B. Tank backfill material (sand, gravel, etc.): Poorly graded sand (SP) C. Native soil type (clay, sand, etc.): Silt (ML) to clay (CL) D. Was petroleum -contaminated soil (PCS) encountered during excavation? ® Yes ❑ No 1. If yes, was all contamination removed by excavating the allowed volume of soil according to Excavation of petroleum - contaminated soil and tank removal sampling, Section A? ® Yes ❑ No • If no, and the site falls into a situation(s) outlined in Excavation of petroleum -contaminated soil and tank removal sampling Section I.B., a Limited Site Investigation (LSI) or Remedial Investigation (RI) is necessary. Refer to Soil and groundwater assessments performed during site investigations for requirements of further investigation, or justify the rationale for not completing further investigation. Based on field screening results and laboratory analysis of confirmatory soil samples, grossly contaminated soil has been removed from the Site release source area. Approval to remove up to 500 cubic yards of grossly contaminated soil was approved by the MPCA on November 30, 2022 during impacted soil excavation activities. PID readings of all confirmation bottom and sidewall samples were between 1.7 and 96.0 parts per million (ppm). Laboratory analysis of collected soil samples did not identify GRO or DRO concentrations above the MPCA threshold (100 mg/kg) for requiring additional investigation and providing evidence that the majority of petroleum impacted soil has been excavated from the Site. E. Was petroleum saturated or grossly contaminated soil encountered during the excavation? ® Yes ❑ No 1. If yes, was the petroleum saturated or grossly contaminated soil removed? ® Yes ❑ No 2. If petroleum saturated or grossly contaminated soil was not removed, why? N/A — Impacted soil with PID readings greater than or equal to 200 ppm has been removed from the Site. F. Total volume of PCS removed for treatment or disposal 552 cubic yards 1. Volume of the removed soil that was petroleum saturated or grossly contaminated: 552 cubic yards Note: Excavation of petroleum -contaminated soil and tank removal sampling details the criteria for and volume of petroleum - contaminated, petroleum saturated and grossly contaminated soil that can be excavated without prior MPCA approval. If the volume to be removed is greater than allowed, contact the MPCA for approval. If granted approval, provide the name of the MPCA staff who granted approval, the approval date, and how the approval was received. Luis Allen (MPCA Project Manager) approved up to 500 cubic yards for impacted soil excavation on November 30, 2022 via phone and email correspondence. The email approving additional soil excavation is included in Appendix C. 2. Were new tanks, piping, and/or dispensers installed? ❑ Yes ® No a. If yes, what portion of the total volume of PCS was excavated to accommodate the installation of the new tanks and/or piping? i. Volume of PCS excavated to accommodate the installation of new tanks and/or piping that was for removed for treatment or disposal: N/A cubic yards • Volume of PCS excavated to accommodate the installation of new tanks and/or piping that was petroleum saturated or grossly contaminated: N/A cubic yards https://www.pca.state.mn.us 651-296-6300 800-657-3864 Use your preferred relay service Available in alternative formats c-prp3-02 • 7/14/22 Page 4 of 9 3. If contaminated soil was excavated to accommodate new tanks and/or piping, show your calculations supporting the volume of soil removal allowed using Table 2A or 2B in Excavation of petroleum -contaminated soil and tank removal sampling. N/A — additional tank(s) and/or piping was not installed. G. Was groundwater or perched water encountered, or was there evidence of a seasonally high groundwater table, such as mottling, during excavation? ❑ Yes At what depth? N/A feet Note: Excavation of petroleum -contaminated soil and tank removal sampling requires one groundwater sample per basin be collected. Include analytical results in Section 6: Table 4 Water Sample Analytical Results. ® No What is the depth of the groundwater? Estimated 160 feet The estimated depth to groundwater is referenced from the measured static groundwater level listed on the Minnesota Department of Health (MDH) well log for the nearest identified private well with static water level information (Unique #439770). The private well is located approximately 2,120 feet (0.40 mile) southeast of the release source area (former fuel dispensers). The well log referenced for groundwater depth is included in Appendix D. H. Was bedrock encountered in the excavation basin? ❑ Yes ® No At what depth? N/A feet I. Were other unique site conditions associated with this site? Example: karst or high-water table. ❑ Yes ® No If yes, explain: N/A Section 3: Sampling information A. Describe the soil analytical sampling and handling procedures used. During UST system removal sampling conducted on November 15, 2022, soil samples B-1 through B-6 were collected from below each end of removed gasoline or diesel fuel USTs at depths of approximately 13 feet bgs. In addition, soil samples D-1 through D-6 were collected beneath removed fuel dispensers at depths of approximately 4 feet bgs. Tank excavation basin sidewall samples were collected for field screening purposes at depths of 10 feet bgs. Field screening activities, including visual and olfactory observations, identified grossly petroleum impacted soil below each removed fuel dispenser. Petroleum odors or staining was not observed throughout the former UST basin. Soil samples collected below the removed USTs were submitted to Eurofins for PVOC, DRO and/or GRO for laboratory analysis. During impacted soil excavation from below and around the former fuel dispensers, a total of eight excavation bottom, 17 sidewall samples and 19 "removed" soil samples were collected for field screening purposes and to guide the excavation. A total of six confirmation basin bottom samples were collected from below each removed fuel dispenser location at depths between 4.5 and 7 feet bgs for DRO, GRO and PVOC analysis. In addition, a total of eight sidewall samples were collected along each excavation sidewall for DRO, GRO and PVOC analysis. The excavation soil samples were collected at select locations to confirm grossly impacted soil removal and definition. Soil sampling locations are visually depicted on Figures 3a and 3b, attached. Select soil samples were submitted to Eurofins for laboratory analysis of DRO and/or GRO and PVOCs. The laboratory analytical reports are attached as Appendix C. To minimize cross contamination of samples, clean disposable gloves and sampling utensils were used while obtaining samples for analytical testing. Soil samples were collected in laboratory -supplies, test specific sample containers, then stored and shipped in ice -filled containers along with their chain -of -custody (COC) form until they were relinquished to the laboratory. B. Describe the field screening methods used to distinguish contaminated from uncontaminated soil. Soil samples collected during on -Site field screening activities were placed in polyethylene bags. The bag headspace analysis was completed with a MiniRAE PID equipped with a 10.6 eV lamp. Each bag was half filled with soil and was closed for a minimum of 10 minutes and then was shaken for 15 seconds before the probe tip was inserted into the bag. The highest meter reading by the PID within five seconds was then recorded. The PID was calibrated on -Site prior to use with compressed isobutylene gas to read parts -per -million volume/volume of benzene vapors. In addition, visual and olfactory observations were used to determine potential contaminated from uncontaminated soil. C. A post -excavation boring is required to determine the need for additional investigation at certain sites with sandy or silty sand soil and where the water table is within 25 feet of the ground surface. For more information, refer to MPCA document Excavation of petroleum -contaminated soil and tank removal sampling. Was a post -excavation boring required? ❑ Yes ® No 1. If yes, was a post -excavation boring completed? ❑ Yes Update the soil screening and analytical results in Section 6: Tables. https://www.pca.state.mn.us 651-296-6300 800-657-3864 Use your preferred relay service Available in alternative formats c-prp3-02 • 7/14/22 Page 5 of 9 Z No Explain why no post -excavation soil boring was completed. Laboratory analysis of all soil samples collected below the removed USTs did not identify petroleum constituent concentrations above laboratory reporting limits with the exception of two PVOC concentrations just above laboratory detection limits. In addition, a total of approximately 552 cubic yards (773.03 tons) of grossly contaminated soil has been removed from below and around the former fuel dispensers (release source area). Below is a summary of impacted soil excavation analysis: Basin bottom confirmation soil samples: Laboratory analysis of confirmation bottom soil samples collected throughout the impacted soil excavation basin (below each former fuel dispenser) did not identify GRO or DRO concentrations above laboratory reporting limits with the exception of a low DRO concentration (8.94 mg/kg) below former fuel dispenser D-4 (excavation soil sample B-5). The identified DRO concentration is just above the laboratory reporting limit and well below the MPCA threshold (100 mg/kg) requiring additional investigation. Low levels of residual PVOC concentrations were identified above the laboratory reporting limits below former fuel dispensers D-2, D-3, and D-4 (excavation bottom samples B-1, B-9, and B-5, respectively). North sidewall confirmation soil samples: Laboratory analysis of soil samples S-5 and S-7, collected along the northern excavation sidewall, did not identify petroleum constituent concentrations above the laboratory reporting limits. South sidewall confirmation soil samples: Laboratory analysis of soil sample S-16, collected along the southern excavation sidewall, identified low GRO and DRO concentrations of 57.7 mg/kg and 14.8 mg/kg, respectively. The GRO and DRO concentrations identified in sidewall soil sample S-16 are well below the MPCA threshold (100 mg/kg) requiring additional investigation. GRO and DRO were not identified at concentrations above the laboratory reporting limits in sidewall soil sample S-17. Low levels of residual PVOC concentrations were identified just above the laboratory reporting limits in sidewall samples S-16 and S-17. • West sidewall confirmation soil samples: Laboratory analysis of soil samples S-9 and S-15, collected along the western excavation basin sidewall, identified low GRO concentrations (15.9 mg/kg and 14.5 mg/kg, respectively) and low DRO concentrations (9.30 mg/kg and 8.35 mg/kg, respectively). Each identified GRO and DRO concentration is well below the MPCA threshold (100 mg/kg) requiring additional investigation. Low levels of residual PVOC concentrations were identified above the laboratory reporting limits in sidewall samples S-9 and S-15. • East sidewall confirmation soil samples: Laboratory analysis of soil samples S-1 and S-4, collected along the eastern excavation sidewall, did not identify petroleum constituents present at concentrations above laboratory reporting limits. Fine-grained silt (ML) to clay (CL) soil was encountered throughout the Site. A shallow groundwater unit was not encountered to a maximum depth of 13 feet bgs during UST system removal. The maximum depth of the petroleum impacted soil excavation below the former fuel dispensers was seven feet bgs. Field screening activities and laboratory analysis of soil samples collected throughout the excavation bottom and along each excavation sidewall indicates that grossly impacted soil at the Site have been removed. Remaining residual petroleum impacts are low magnitude and do not pose a significant risk to the Site. In addition, silt and clay limits residual soil contamination from impacting a potential shallow groundwater unit. 2. If groundwater was encountered or if a soil boring was conducted, was there field evidence of groundwater contamination? ❑ Yes ❑ No ® N/A a. If yes, describe evidence of contamination, such as non -aqueous phase liquid (NAPL) - specify thickness (feet), product sheen, or groundwater in contact with petroleum -contaminated soil. N/A Note: If you observe NAPL, contact the Minnesota duty officer immediately as outlined in MPCA guidance document Light non -aqueous phase liquid management strategy. https://www.pca.state.mn.us c-prp3-02 • 7/14/22 • 651-296-6300 800-657-3864 Use your preferred relay service Available in alternative formats Page 6 of 9 Section 4: Soil treatment or disposal information A. Has the removed PCS been treated or disposed of? ® Yes ❑ No ❑ N/A 1. If yes, specify method(s) of soil treatment or disposal used and treatment site/facility information: ® Landfilling ❑ Land treatment ❑ Composting ❑ Out-of-state, please describe: a. Treatment site/facility information: ❑ Thin spreading, if less than 10 cubic yards MPCA treatment or disposal Site ID for in-state facilities (e.g., SW-##, CS00#####, PRE000###): Treatment site/Facility name: Dem -Con Landfill Physical address: 3601 West 13011 Street City: Shakopee State: MN Zip: 55379 SW -555 Note: If petroleum -contaminated soil was landfilled, include disposal receipts and required information in Section 8: Appendix C. b. If soils were land treated or composted, date MPCA approved soil treatment (mm/dd/yyyy) 2. If no, provide location of the stockpile: ❑ On leak site property ❑ Off-site, provide location: Physical address: N/A City: N/A State: N/A Zip: N/A Section 5: Conclusions and recommendation Recommendation for site: ® Site closure ❑ Additional investigation N/A Note: Only excavation reports recommending closure will be reviewed as stand-alone reports. Those recommending additional work will be reviewed as part of the LSI or RI. Justify the recommendations for the site. Carlson McCain recommends leak -Site closure and no further investigation at the Site. Laboratory analysis of confirmation soil samples collected below each end of the removed USTs did not identify petroleum constituent concentrations above laboratory reporting limits with the exceptions of low 1,2,4-Trimethylbenzene and xylene concentrations just above reporting limits in soil sample B-1, collected from below the south end of the former 12,000 -gallon gasoline UST (#001). Each removed UST appeared in good to moderate condition. Some rusting was observed throughout the tank surfaces. Minimal pitting and no holes were observed. The PVOC concentrations may be associated with contamination associated with the two historical Site releases (LS#0006964 & LS#0013812). Field screening, including visual and olfactory observations, identified grossly contaminated soil below the removed fuel dispensers during UST system removal sampling activities. Subsequently, a total of approximately 552 cubic yards (773.03 tons) of petroleum impacted soil was removed from below and around the former fuel dispensers. Impacted soil was disposed of at Dem -Con Landfill in Shakopee, MN. Field screening activities and laboratory analysis of soil samples collected throughout the excavation bottom and along each excavation sidewall indicate that grossly impacted soil at the Site have been removed and remaining residual petroleum impacts have been adequately defined. Based on an evaluation of the potential risks as they relate to the remaining residual petroleum concentrations, leak -Site closure is recommended. • The potential for direct dermal contact is considered low risk. All grossly contaminated soil has been removed from the Site. Low -magnitude residual petroleum impacts are located at a depth of at least 4.5 feet bgs within the former release source area. In addition, the Site will be re -paved, significantly limiting the potential for dermal contact. • Concentrations of GRO and/or DRO were not identified above laboratory reporting limits throughout the former UST excavation basin. GRO and DRO concentrations, identified in confirmatory soil samples collected throughout the impacted soil excavation area, were below the MPCA threshold (100 mg/kg) requiring additional investigation. https://www.pca.state.mn.us 651-296-6300 800-657-3864 Use your preferred relay service Available in alternative formats c-prp3-02 • 7/14/22 Page 7 of 9 • The risk of surface water impacts from residual petroleum impacts remaining at the Site are low due to the limited magnitude to migrate a distance to impact any nearby surface water features. Additionally, a shallow groundwater unit was not identified during UST system removal and impacted soil excavation activities to a maximum depth of 13 feet bgs to facilitate horizontal migration towards a surface water feature or other potential receptors. The estimated depth to groundwater is 160 feet bgs based on the measured static groundwater level listed on the MDH well log for the nearest private well with static water level information (Unique #439770), located approximately 2,120 feet (0.40 mile) southeast of the release source area (former fuel dispensers). In addition, fine grain silt and clay observed throughout the Site, limits vertical migration of residual soil impacts to impact a potential groundwater unit. Vapor intrusion is not considered a significant risk at the Site. All Site structures have been removed. In addition, all grossly impacted soil (approximately 552 cubic yards) has been removed from the Site. The residual petroleum constituent concentrations are not considered a significant enough source to generate vapors to any Site or neighboring property buildings. https://www.pca.state.mn.us c-prp3-02 • 7/14/22 • 651-296-6300 800-657-3864 Use your preferred relay service Available in alternative formats Page 8 of 9 Tables Section 6: Tables Table 1. Tank information' Tank UST or Capacity 13' Year installed 156 Tank status date 11/15/2022 Tank # material' AST (gallons) Contents (product type) (yyyy) Tank status3 (mm/dd/yyyy) Tank condition 0.0 B-4 13' Moderate/Good — some 13' Brown poorly graded sand SP with clay, moist 0.0 B-5 13' #001 Steel UST 12,000 Gasoline 1978 Removed 11/15/2022 rusting, minimal pitting, Brown poorly graded sand SP with clay, moist 0.0 S-1 10' 11/15/2022 10' Brown to gray sandy clay (CLS), moist no holes S-2 10' 11/15/2022 10' Brown to gray sandy clay (CLS), moist 0.0 S-3 10' 11/15/2022 10' Moderate/Good — some #002 Steel UST 12,000 Gasoline 1978 Removed 11/15/2022 rusting, minimal pitting, Black silty clay (CL/ML), moist 8.4 D-2 4' 11/15/2022 4' Black silty clay (CL/ML), moist 717 D-3 4' no holes 4' Black silty clay (CL/ML), moist 848 D-4 4' 11/15/2022 4' Black silty clay (CL/ML), moist 512 Moderate/Good — some #003 Steel UST 12,000 Diesel Fuel 1978 Removed 11/15/2022 rusting, minimal pitting, no holes ' Include current and former tanks. 2 Use F for fiberglass or S for Steel. 3 Indicate: active, removed, closed -in-place, temporary closure, abandoned, or new tank installation. Notes: UST = underground storage tank; and AST = aboveground storage tank. Table 2. Results of soil headspace screening Sample ID' Sample date (mm/dd/yyyy) Sample depth (ft) Soil type PID' reading (ppm) UST System Removal — three 12,000 -gallon USTs and six fuel dispensers B-1 13' 11/15/2022 13' Brown poorly graded sand SP with clay, moist 156 B-2 13' 11/15/2022 13' Brown poorly graded sand SP with clay, moist 70.2 B-3 13' 11/15/2022 13' Brown poorly graded sand SP with clay, moist 0.0 B-4 13' 11/15/2022 13' Brown poorly graded sand SP with clay, moist 0.0 B-5 13' 11/15/2022 13' Brown poorly graded sand SP with clay, moist 0.0 B-6 13' 11/15/2022 13' Brown poorly graded sand SP with clay, moist 0.0 S-1 10' 11/15/2022 10' Brown to gray sandy clay (CLS), moist 0.0 S-2 10' 11/15/2022 10' Brown to gray sandy clay (CLS), moist 0.0 S-3 10' 11/15/2022 10' Brown to gray sandy cla CLS , moist 0.0 S-4 10' 11/15/2022 10' Brown to gray sandy clay (CLS), moist 0.0 D-1 4' 11/15/2022 4' Black silty clay (CL/ML), moist 8.4 D-2 4' 11/15/2022 4' Black silty clay (CL/ML), moist 717 D-3 4' 11/15/2022 4' Black silty clay (CL/ML), moist 848 D-4 4' 11/15/2022 4' Black silty clay (CL/ML), moist 512 https://www.pca.state.mn.us 651-296-6300 800-657-3864 c-prp3-02 • 7/14/22 Use your preferred relay service Available in alternative formats Page 9 of 9 D-5 4' D-6 (4') Impacted Soil Excavation — removed fuel dispenser area R-1 5' 11/30/2022 5' Gray to green silt ML 412 B-1 6' 11/30/2022 6' Grayish brown silt ML 24.6 S-1 6' 11/30/2022 6' Grayish brown silt ML 4.2 S-2 6' 11/30/2022 6' Grayish brown silt ML 5.1 R-2 5' 11/30/2022 5' Greenish gray silt ML with some clay 604 R-3 5' 11/30/2022 5' Greenish gray silt ML with some clay 298 R-4 5' 11/30/2022 5' Greenish gray silt ML with some clay 850 R-5 6' 11/30/2022 6' Greenish gray silt ML with some clay 800 R-6 6' 11/30/2022 6' Greenish gray silt ML with some clay 1,080 R-7 6' 11/30/2022 6' Greenish gray silt ML with some clay 780 R-8 6.5' 11/30/2022 6.5' Greenish gray silt ML with some clay 1,650 B-2 7' 11/30/2022 7' Brown silt ML 8.1 R-9 6' 11/30/2022 6' Gray silt ML with some clay 300 S-3 7' 11/30/2022 7' Brown silt ML 1.7 S-4 7' 11/30/2022 7' Grayish brown silt ML with some clay 4.5 R-10 6' 11/30/2022 6' Greenish gray silt ML with some clay 250 B-3 7' 11/30/2022 7' Gray silt ML 7.6 B-4 (7') S-5 6' 11/30/2022 11/30/2022 7' Brown silt (ML) Brown silt ML 1.9 6' 30.1 R-11 4' 11/30/2022 4' Black silt ML with some clay (organic) 441 B-5 4.5' 11/30/2022 4.5' Black silt ML with some clay (organic) 7.4 S-6 4.5' 11/30/2022 4.5' Black silt ML with some clay (organic) 11.5 R-12 4.5' 11/30/2022 4.5' Black silt ML with some clay (organic) S-7 4.5' 11/30/2022 4.5' Black silt ML with some clay (organic) 6.8 S-8 4.5' 11/30/2022 4.5' Black silt ML with some clay (organic) 20.4 S-9 5' 12/01/2022 5' Black silt ML with some clay (organic) 20.1 S-10 5' 12/01/2022 5' Black silt ML with some clay (organic) 17.7 B-6 5' 12/01/2022 5' Black silt ML with some clay (organic) 24.1 https://www.pca.state.mn.us 651-296-6300 800-657-3864 c-prp3-02 • 7/14/22 Use your preferred relay service Available in alternative formats Page 10 of 9 R-13 5' 12/01/2022 6' Light greenish gray silt ML 252 R-14 4' 12/01/2022 5' Black silt ML with some clay (organic) 812 R-15 5' 12/01/2022 5' Black silt ML with some clay (organic) 699 S-11 5' 12/01/2022 5' Black silt ML with some clay (organic) 36.0 S-12 5' 12/01/2022 5' Brown silt ML 3.1 S-13 5' 12/01/2022 5' Gray to black silt ML with some clay 2.1 R-16 5' 12/01/2022 5' Gray to black silt ML with some clay 414 B-7 5.5' 12/01/2022 5.5' Brown silt ML 5.1 S-14 5' 12/01/2022 5' Gray to black silt ML with some clay 24.8 S-15 5' 12/01/2022 5' Gray to black silt ML with some clay 50.2 R-17 5' 12/01/2022 5' Brown to black silt ML with some clay 450 R-18 5' 12/01/2022 5' Brown to black silt ML with some clay 709 S-16 5' 12/01/2022 5' Brown to black silt ML with some clay 96.0 B-8 5' 12/01/2022 5' Brown silt (ML) with some clay 13.4 B-9 5' 12/02/2022 5' Gray silt ML 19.1 R-19 5' 12/02/2022 5' Gray to black silt ML with some clay 271 S-17 5' 12/02/2022 5' Gray to black silt ML with some clay 8.2 Code the samples sequentially with the following prefixes: sidewall samples with an S, bottom samples with a B, removed soil with an R, stockpile samples with SP, line samples with an L, substance transfer locations with a T, and dispensers with a D. Sample codes should correspond to the site map. 2 PID = photoionization detector. Red text indicates removed soil for disposal. Green highlighted indicates samples submitted for laboratory analysis. https://www.pca.state.mn.us 651-296-6300 800-657-3864 c-prp3-02 • 7/14/22 Use your preferred relay service Available in alternative formats Page 11 of 9 Table 3. Analytical results of soil samples' 1,2,4- 1,3,5 - Sample Sample date Ethyl- Trimethyl- Trimethyl- Naph- Sample IDZ depth (ft) (mm/dd/yyyy) Benzene Toluene benzene Xylenes MTBE benzene benzene thalene GRO DRO Lab type2 UST Excavation Basin -three 12.000 -gallon USTs B-1 13' 13' 11/15/2022 <0.109 <0.109 <0.109 0.265 <0.109 0.286 <0.109 <0.273 <10.2 NA Fixed B-2 13' 13' 11/15/2022 <0.109 <0.109 <0.109 <0.164 <0.109 <0.109 <0.109 <0.273 <10.5 NA Fixed B-3 13' 13' 11/15/2022 <0.113 <0.113 <0.113 <0.169 <0.113 <0.113 <0.113 <0.282 NA <5.70 Fixed B-4 13' 13' 11/15/2022 <0.110 <0.110 <0.110 <0.165 <0.110 <0.110 <0.110 <0.275 NA <5.74 Fixed B-5 13' 13' 11/15/2022 <0.103 <0.103 <0.103 <0.154 <0.103 <0.103 <0.103 <0.256 <9.83 NA Fixed B-6 13' 13' 11/15/2022 <0.118 <0.118 <0.118 <0.177 <0.118 <0.118 <0.118 <0.296 <10.3 NA Fixed <0.181 McOH Blank 11/15/2022 <0.100 <0.100 <0.100 <0.150 <0.100 <0.100 <0.100 <0.250 <10.0 NA Fixed Impacted Soil Excavation - removed fuel dispenser area B-1 6' 6' 11/30/2022 <0.150 <0.150 <0.150 <0.225 <0.150 0.364 <0.150 <0.374 <17.9 <6.28 Fixed B-3 7' 7' 11/30/2022 <0.143 <0.143 <0.143 <0.214 <0.143 <0.143 <0.143 <0.356 <11.8 <6.78 Fixed B-5 4.5' 4.5' 11/30/2022 <0.162 <0.162 0.976 0.843 <0.162 1.46 <0.162 <0.405 <13.8 8.94 Fixed B-6 5' 5' 12/01/2022 <0.137 <0.137 <0.137 <0.205 <0.137 <0.137 <0.137 <0.342 <12.0 <6.73 Fixed B-8 5' 5' 12/01/2022 <0.155 <0.155 <0.155 <0.233 <0.155 <0.155 <0.155 <0.388 <12.5 <6.80 Fixed B-9 5' 5' 12/02/2022 <0.128 0.206 0.320 1.41 <0.128 1.22 0.333 <0.321 <10.8 <7.77 Fixed S-1 6' 6' 11/30/2022 <0.121 <0.121 <0.121 <0.181 <0.121 <0.121 <0.121 <0.302 <11.0 <6.67 Fixed S-4 7' 7' 11/30/2022 <0.141 <0.141 <0.141 <0.211 <0.141 <0.141 <0.141 <0.352 <13.5 <7.61 Fixed S-5 6' 6' 11/30/2022 <0.143 <0.143 <0.143 <0.215 <0.143 <0.143 <0.143 <0.358 <12.4 <7.64 Fixed S-7 4.5' 4.5' 11/30/2022 <0.206 <0.206 <0.206 <0.309 <0.206 <0.206 <0.206 <0.515 <14.7 <7.33 Fixed S-9 5' 5' 12/01/2022 0.174 <0.124 0.516 0.530 <0.124 1.30 0.147 <0.310 15.9 9.30 Fixed S-15 5' 5' 12/01/2022 <0.147 <0.147 0.509 0.522 <0.147 1.50 0.197 <0.367 14.5 8.35 Fixed S-16 5' 5' 12/01/2022 0.616 0.648 6.03 9.84 <0.132 4.84 2.38 2.29 57.7 14.8 Fixed S-17 5' 5' 12/02/2022 <0.121 <0.121 0.128 0.270 <0.121 0.153 <0.121 <0.302 <10.9 <5.82 Fixed McOH Blank 11/30/2022 <0.100 <0.100 <0.100 <0.150 <0.100 <0.100 <0.100 <0.250 <10.0 NA Fixed ' Report results in mg/kg. If results are below reporting limits, use < with the report level. 2 Code the samples sequentially with the following prefixes: sidewall samples with an S, bottom samples with a B, removed soil with an R, stockpile samples with SP, line samples with an L, substance transfer locations with a T, and dispensers with a D. Sample codes should correspond to the site map. 3 Indicate `mobile" or `fixed" in the lab type column. Notes: GRO = gasoline range organics; DRO = diesel range organics; MTBE = methyl -tent -butyl -ether; and NA = not analyzed. Bold indicates concentration above laboratory reporting limit. https://www.pca.state.mn.us 651-296-6300 800-657-3864 Use your preferred relay service Available in alternative formats c-prp3-02 • 7/14/22 Page 12 of 9 Table 4. Other contaminants detected in soil samples (petroleum or non -petroleum derived)' Sample ID depth ft mm/dd/ y N/A ' Report results in mg/kg. Use less than symbols to show the report level. 2 Indicate `mobile" or "fixed" in the lab type column. Table 5. Water sample analytical results' 1,2,4-1,3,5- Sample Sample date Ethyl- Trimethyl Trimethyl Naph- ID depth (ft) (mm/dd/vvvv) Benzene Toluene benzene Xvlenes MTBE -benzene I -benzene thalene GRO IDRO N/A I I I I I I I ' Report results in pg/L. Use less than symbols to show the report level. 2 Indicate `mobile" or "fixed" in the lab type column. 3 See the MDH Human Health -Based Water Guidance Table for a list of current Health Risk Limits (HRLs). Table 6. Other contaminants detected in water samples (petroleum or non -petroleum derived)' Lab N/A I I I ' Report results in Ng/L. Use less than symbols to show the report level. 2 Indicate `mobile" or "fixed" in the lab type column. 3 See the MDH Human Health -Based Water Guidance Table for a list of current HRLs. https://www.pca.state.mn.us 651-296-6300 800-657-3864 Use your preferred relay service Available in alternative formats c-prp3-02 • 7/14/22 Page 13 of 9 Section 7: Figures All figures must include a north arrow, scale, and legend. Approximate scales are not acceptable. Utilize aerial photographs as the basis of site figures with caution since the height of buildings and structures may skew and misrepresent the apparent location due to camera angle. Attach all required figures in the following order. Indicate figures included in this report by marking the check box. Double click checkboxes to select Checked and select OK. ® Figure 1: Site location map using a U.S. Geological Survey 7.5 minute quadrangle map a. Include adjacent city, township, county, or state roadways. ® Figure 2: Detailed site map, utilizing aerial imagery, showing: a. On-site and nearby structures, location of utilities. b. All past and present petroleum storage tanks, piping, dispensers and transfer areas. c. Any on-site water supply wells. If on-site water wells exist, provide well logs and/or construction diagrams. ® Figure 3: Detailed excavation map showing: a. Dimensions of excavation(s), including contour lines (maximum 2 -foot contour intervals) to represent the depths of the final excavation(s). b. Location of remaining surface soil contamination. c. Location of soil screening samples (e.g., R-1), soil analytical samples (e.g., S-1 or B-1), and any soil borings (e.g., SB -1). d. Location of soil stockpile, if remaining onsite. Section 8: Appendices Attach all required or applicable appendices in the following order. Indicate appendices included in this report by marking the check box. All reproduced data must be legible. Appendix A and B are required. ® Appendix A Release information worksheet ® Appendix B Laboratory reports ® Appendix C Landfill information, if applicable For soils disposed at a landfill, provide the following information on landfill letterhead, weight tickets, or on an invoice: 1. Date soil was accepted at landfill. 2. Name of petroleum -contaminated soil generator. 3. Total weight (tons) or volume (cubic yards) of petroleum -contaminated soil accepted . 4. What the landfill did with the petroleum -contaminated soil (e.g., daily cover). ® Appendix D Soil boring logs, if applicable, and other site documentation (e.g., field data sheets, photos) https://www.pca.state.mn.us 651-296-6300 800-657-3864 Use your preferred relay service Available in alternative formats c-prp3-02 • 7/12/22 Page 14 of 9 Figures FOUR -OAKS RD �0 L� M' E'ST Q V D 7 ' CENTRAS' Po 1� 8sQ Argosy Q�JAR Uriiversit -Tw n R}-�� Y Cities • YANKEE DOODLE RD CO RD 28 0 Ic NORTH �y, o UST SYSTEM REMOVAL & CAR LSO N IMPACTED SOIL EXCAVATION EAGAN BP FIGURE 1 O\N*N M C CA I k 1424 YANKEE DOODLE ROAD SITE LOCATION 15650 36th Ave N, Suite 110, Plymouth, MN 55446 ] 7 EAGA�Ni,MNT 55122 Phone : 9www.c rlson Fax : .com 6-3901 CARLSON MCCAIIV PROJECT NO.: 10390-00 www.ca rlson mcwin.com MPCA LEAK -SITE NO.: LS0021863 s a 900 0' earn Lake J o Rasmussen h Cottege-Eaga 0 50 _. 41. �r Ry --'RD 1.6 o 1:5� CRESTRIDGE LN o 850 CRY Q� SOURCE: USGS QUAD SAINT PAUL SW, MN (2022) SITE LOCATION N 0 1000 2000 IIIIIIIIIII 1 1 SCALE IN FEET UST SYSTEM REMOVAL & CAR LSO N IMPACTED SOIL EXCAVATION EAGAN BP FIGURE 1 O\N*N M C CA I k 1424 YANKEE DOODLE ROAD SITE LOCATION 15650 36th Ave N, Suite 110, Plymouth, MN 55446 ] 7 EAGA�Ni,MNT 55122 Phone : 9www.c rlson Fax : .com 6-3901 CARLSON MCCAIIV PROJECT NO.: 10390-00 www.ca rlson mcwin.com MPCA LEAK -SITE NO.: LS0021863 W" YANKEE DOODLE ROAD wr �r..rf FORMER UST EXCAVATION BASIN: #001: 12,000 -GALLON GASOLINE UST - #002:12,000 -GALLON GASOLINE UST #003: 12,000 -GALLON DIESEL FUEL UST I � I � FORMER FUEL DISPENSER t 4 I CANOPY } MER SITE NEIG Bi ASPHA # UljCG. COMMERCIAL SR PROPERTY (DUNKIN DONUTS R � i GG * CONCRETE �cP RURFACE 2 FORMER GASOLINE & air OQ DIESEL FUEL3 T IL„ ..' FORMER GASOLINE DISPENSERS ASPHALT SRURFACE *'W* --V ACCESS ROAD - low ' "fir 3r - t TOWARD YANKEE DOODLE ROAD FORMER VENT PIPES 000 r------------- -------------- -- --� S-4 (10') 1 /FORMER UST 1 f EXCAVATION I I r BASIN I I 1 —[<5.74] ( <9 83) I 1 (<10.3) I B-4 (13') B-5 (13') B 6 (13') 1 I I I I I 1 #003 S-3 (10') X 12,000 -gallon #002 12,000 gallon I 1 #001 S-1 (10') 1 Diesel Fuel UST Gasoline UST 12,000 gallon Gasoline UST [<5.70] (<10.5) (<10.2) I B-3 (13') B-2 (13') B-1 (13') I I I I 1 1 I I I I L------------- I I I --------------- S-2(10') ASPHALT SURFACE NORTH SIDE OF IMPACTED SOIL EXCAVATION i i i i i i i i X SOIL SAMPLE LOCATION FOR LAB ANALYSIS X FIELD SCREENED SOIL SAMPLE LOCATION [<5.74] SOIL DRO CONCENTRATION (mg/kg) 0 10 20 N (<10.2) SOIL GRO CONCENTRATION (mg/kg) 11111111111 1 1 mg/kg = MILLIGRAMS PER KILOGRAM SCALE IN FEET UST SYSTEM REMOVAL & CARLSON IMPACTED SOIL EXCAVATION EAGAN BP FIGURE 3a O\NN M c CA I N 1424 YANKEEDOODLEROAD UST BASIN PLAN 15650 36th Ave N, Suite 110, Plymouth, MN 55446 EAGAN, MN J 5 122 VIEW JI�`� J Phone: 9www.c rlson Fax: .com 6-3901 CARLSON MCCAIN PROJECT NO.: 10390-00 �/ �/�/ www.ca rlson mcca in.com MPCA LEAK -SITE NO.: LS0021863 o 'm s �D �> 3�N 0� a �1 ' 3 3"s r A. �z o ACD p `� co II F v O O n O Z Z A N O O n O Z z X m r �7 m Zr- 0 X 0 F cn D m r 00 r---- i �+ ;; I v a �0 u V l I I I I I (/� (n '`� ,fir--- — --- --J O G) I -uo>° X X x aioz W .17 Imm 00-4 v v q A-" 0o A CJi _ ---� `cG' ,`1 coo ` m0� (Zi) mm �'o m r (n U) 00 W ZI cn O N .�. in—Z. — �, —A� I -4� A A W I vw I v I I I N I �7 O I cn I m D y 0 z I Q I OZ Oz I F O I i m I I I-� cQ c3 D I ---------- ---------� b y cn r OD pp I ' — D Z A ' 00 I I a I"C Z I o I w I CA �o ' ? A C/1 Z r p yby7 M� Iy�y1 r s I -A -A I CJi A G) Ti �� I an D 0 m0K '_' I cn am Z a C) r fl O u, !< ZM I cn mmA I ?Am I m U)z I C° -C� I ozNm �p oONO X czo I ' CCI < DD ' I mm � I O I I b Rp o Z G) I p m Z m z m I w I I � ------+--------n----------J _------X m I I 4 I I I zD I rn AI D I 0- `a I I I I I I �oo�o N I woo W O I O O N O7 I CO' 00 W l A O G)�T cn Cl)D.101 xm0if I O G) �t 0C, > AL m� V ? I .� �.� X I j A ��,,y! tjl N V '�` O? A A W X ' Ami Ami D L------ m (7 G — — — — — - X (,$) E-2i 1 y i ^ M O Acn � I o, I X X I Z C z Z co I I oo x x N W Cn N X (.9) 9-b I I cn m I Vrnrnin V X (,9) L-b I w y_ m O co T I I X (9) 6-?J � mL---------- — ------J N O O C�� G) X Z D m S^7 07 Appendix A M MINNESOTA POLLUTION Release information worksheet CONTROL AGENCY 520 Lafayette Road North Petroleum Remediation Program 5t. Paul, MN 55155-4194 Guidance document 2-05 Doc Type: Environmental Development/Guidance Instructions: Complete this worksheet to document tank and release information as required by the public record provision of the Energy Policy Act of 2005. Submit the completed worksheet as an appendix to either the General excavation report worksheet, Investigation report, or Monitoring report. These report forms are found on the Minnesota Pollution Control Agency (MPCA) Cleanup guidance webpage at https://www.pca.state.mn.us/waste/cleanup-guidance. A. General information Site name: Eagan BP B. Tank material Check all that apply: ® Steel ❑ Fiberglass C. Piping material Check all that apply: ® Steel ❑ Fiberglass ❑ Flexible plastic ❑ Copper ❑ Other (specify): MPCA Site ID: LS0021863 D. Identify the known source(s) of the release or contamination encountered Check options that were verified. If source is unknown, check other and describe. ❑ Piping ❑ Tank ® Dispenser ❑ Submersible turbine pump ❑ Delivery problem ❑ Other (specify): E. Identify the cause of the release (tank and/or piping) Check all that apply. ❑ Overfill ❑ Mechanical or physical damage ❑ Install problem ❑ Corrosion ® Spill ❑ Unknown ❑ Other (specify): F. Identify how the release was detected Check all that apply. ® Removal ❑ Line leak detection ❑ Tank leak detection ❑ Visual/Olfactory ❑ Site assessment ❑ Other (specify): G. Has the site ever stored E85 in any former or current tank? ❑ Yes ® No ❑ Unknown H. Has the site ever stored leaded gasoline in any former or current tank? ❑ Yes ® No ❑ Unknown https://www.pca.state.mn.us 651-296-6300 800-657-3864 Use your preferred relay service Available in alternative formats c-prp3-02 • 7/12/22 Page 1 of 1 Appendix D Minnesota Unique Well Number County Dakota 439770 Quad St Paul SW Quad ID 103C MINNESOTA DEPARTMENT OF HEALTH WELL AND BORING REPORT Minnesota Statutes Chapter 1031 Entry Date 03/22/2001 Update Date 09/24/2018 Received Date Well Name Township Range Dir Section Subsection Well Depth Depth Completed Date Well Completed EAGAN MW 27 23 W 16 ACBABB 415 ft. 415 ft. 04/21/1988 Elevation 909 ft. Elev. Method 7.5 minute topographic map (+/- 5 feet) Drill Method Non-specified Rotary Drill Fluid Bentonite Address Use monitor well Status Active Contact 2795 PILOT KNOB RD EAGAN MN 55123 Well Hydrofractured? Yes ❑ No ❑ From To Casing Type Single casing Joint Threaded Drive Shoe? Yes ® No ❑ Above/Below 3 ft. Stratigraphy Information Casing Diameter Weight Hole Diameter Geological Material From To (ft.) Color Hardness SAND 0 10 BROWN SOFT 8 in. To 365 ft. 18.9 lbs./ft. 12 in. To 365 ft. GRAVELY- CLAY 10 15 VARIED MEDIUM 6 in. To 415 ft. SAND & GRAVEL 15 65 VARIED MEDIUM CLAY 65 195 BROWN MEDIUM SILTY CLAY 195 210 RED MEDIUM pen Hole From 365 ft. To 415 ft. CLAY 210 365 BLUE MEDIUM Screen? ❑ Type Make DOLOMITE 365 400 ORANGE V.HARD SANDSTONE 400 415 WHITE MEDIUM Static Water Level 160 ft. land surface Measure 05/16/1988 Pumping Level (below land surface) Wellhead Completion Pitless adapter manufacturer Model ❑ Casing Protection X 12 in. above grade ❑ At -grade (Environmental Wells and Borings ONLY) Grouting Information Well Grouted? 0 Yes ❑ No ❑ Not Specified Material Amount From To bentonite 7.5 Cubic yards 0 ft. 365 ft. Nearest Known Source of Contamination feet Direction Type Well disinfected upon completion? Yes ❑ No Pump ® Not Installed Date Installed Manufacturer's name Model Number HP Volt Length of drop pipe ft Capacity g,p, Typ Abandoned Does property have any not in use and not sealed well(s)? ❑ Yes ❑X No Variance Was a variance granted from the MDH for this well? ❑ Yes ❑ No Miscellaneous First Bedrock Prairie Du Chien Group Aquifer Prairie Du Chien - Last Strat Jordan Sandstone Depth to Bedrock 365 ft Located by Minnesota Geological Survey Locate Method Digitization (Screen) - Map (1:24,000) (15 meters or System UTM - NAD83, Zone 15, Meters X 486111 Y 4964050 Remarks COODINATES FROM MR. JOHN EATON. -93.175696,44.829718. M.G.S. NO. 2631. Unique Number Verification Info/GPS from data Input Date 10/01/2012 Angled Drill Hole Well Contractor Bergerson-Caswell 27058 HOLEMEN, G. Licensee Business Lic. or Reg. No. Name of Driller Minnesota Well Index Report 439770 Printed on 12/15/2022 HE -01205-15 UST System Removal & Impacted Soil Excavation Carlson McCain Project #10390-00 Eagan BP — Eagan, MN Photo #1— View of the former UST excavation basin. Two steel 12,000 -gallon gasoline underground storage tanks (USTs), tank #001 & #002; and one steel 12,000 -gallon diesel fuel UST 0003) were removed from the Site on November 15, 2022. The former UST excavation basin was located to the northwest of the former Site building, buried below a concrete surface. This photo was taken standing south of the former UST excavation basin, facing north. Photo #2 — Shows the location of six removed fuel dispensers. Four gasoline fuel dispensers were located beneath the former canopy, adjacent to the west side of the former Site building. Two gasoline and diesel fuel dispensers were located to west/southwest of the former canopy. A total of approximately 552 cubic yards (773.03 tons) of grossly impacted soil (>200 ppm) was removed from the former dispenser area between November 30, 2022 and December 2, 2022. Carlson McCain, Inc. Page 1 of 5 UST System Removal & Impacted Soil Excavation Carlson McCain Project #10390-00 Eagan BP — Eagan, MN Photo #3 — Depicts the former UST excavation basin bottom. Poorly graded sand (SP) backfill and native clayey silt (ML) soil were present within the former UST excavation basin. Petroleum staining or odors were not observed below each removed UST. Photo #4 — View of the removed 12,000 -gallon diesel fuel UST 0003). The UST appeared to be in good to moderate condition. Some rusting, minimal pitting and no holes were observed across the UST surface. Both 12,000 -gallon gasoline USTs (#001 & #002) were removed from the Site prior to Carlson McCain arriving at the Site, but were reported to be in similar condition by Mark Griffiths of Service West Contracting (SWC). Carlson McCain, Inc. Page 2 of 5 UST System Removal & Impacted Soil Excavation Carlson McCain Project #10390-00 Eagan BP — Eagan, MN Photo #5 — Another view of the removed 12,000 -gallon diesel fuel UST (#003). The UST appeared to be in good to moderate condition. Some rusting, minimal pitting and no holes were observed across the UST surface. Photo #6 — View of the east/northeast section of the impacted soil excavation basin (former gasoline dispensers D-1 & D-2). The final excavation depth in this area was between 6 and 7 feet bgs. Field screening and laboratory analysis of collected soil samples indicated that the majority, if not all impacted soil was removed from the Site release source area (each fuel dispenser). Carlson McCain, Inc. Page 3 of 5 UST System Removal & Impacted Soil Excavation Carlson McCain Project #10390-00 Eagan BP — Eagan, MN Photo #7 — View of the north and west/southwest section of the impacted soil excavation basin (former gasoline dispenser D-4 and former diesel fuel dispenser D- 5). The final excavation depth in this area was between 4.5 and 5 feet bgs. ppp- AW, it Photo #8 — View of the west/southwest section of the impacted soil excavation basin (step out area west/southwest between former diesel fuel dispensers D-5 & D-6). The final excavation depth in this area was 5 feet bgs. Carlson McCain, Inc. Page 4 of 5 UST System Removal & Impacted Soil Excavation Eagan BP — Eagan, MN Photo #9 — Carlson McCain Project #10390-00 vation basin (former diesel fuel dispenser D-6 and former gasoline dispenser D-3). The final excavation depth in this area was 5 feet bgs. Carlson McCain, Inc. Page 5 of 5