Loading...
HomeMy WebLinkAboutDSHW-2024-004930 2410 WEST CALIFORNIA AVENUE •SALT LAKE CITY, UTAH 84104 PHONE (801) 972-8400 • FAX (801) 972-8459 Website: www.wasatch-environmental.com • e-Mail: wei@wasatch-environmental.com Mr. Doug Hansen February 28, 2024 Utah Department of Environmental Quality Project No.: 2241-001C Division of Waste Management and Radiation Control P.O. Box 144880 Salt Lake City, Utah 84114-4880 RE: Work Plan for Replacement Monitoring Well Installation The Beverly Former American Barrel 63 South 600 West Salt Lake City, Utah Mr. Hansen, Wasatch Environmental, Inc., is submitting this Draft Work Plan for Replacement Monitoring Well Installation for the above referenced facility. Please feel free to contact me with any questions, comments, or concerns you may have with respect to this project. Best regards, Rebecca Studenka Senior Project Geologist WASATCH ENVIRONMENTAL, INC. ENVIRONMENTAL SCIENCE AND ENGINEERING 2410 WEST CALIFORNIA AVENUE SALT LAKE CITY, UTAH 84104 PHONE (801) 972-8400 FAX (801) 972-8459 e-mail: wei@wasatch-environmental.com www.wasatch-environmental.com WORK PLAN FOR REPLACEMENT MONITORING WELL INSTALLATION THE BEVERLY 63 SOUTH 600 WEST SALT LAKE CITY, UTAH Project No. 2241-002C Prepared for: Mr. Matthew Beaudet C.W. Land 1222 West Legacy Boulevard, Suite 6 Centerville, Utah 84014 and Mr. Doug Hansen Utah Department of Environmental Quality Division of Waste Management and Radiation Control P.O. Box 144880 Salt Lake City, UT 84114-4880 February 28, 2024 Prepared by: Wasatch Environmental, Inc. 2410 West California Avenue Salt Lake City, UT 84104 Wasatch Environmental, Inc. Page 1 TABLE OF CONTENTS Section Page No. 1. INTRODUCTION .............................................................................................................................. 2 1.1 Facility Description .............................................................................................................. 2 1.2 Facility Background ............................................................................................................. 2 1.3 Objective ............................................................................................................................. 3 2. GROUNDWATER MONITORING WELL INSTALLATION ACTIVITIES ......................................... 3 3. WASTE CHARACTERIZATION SAMPLING AND ANALYSIS........................................................ 4 4. HEALTH AND SAFETY ................................................................................................................... 4 5. PROJECT SCHEDULE .................................................................................................................... 4 FIGURES Figure 1 – Facility Layout Map Figure 2 – Facility Vicinity Map Figure 3 – Current and Proposed Replacement Monitoring Well Location Map Wasatch Environmental, Inc. Page 2 WORK PLAN FOR REPLACEMENT MONITORING WELL INSTALLATION THE BEVERLY 63 SOUTH 600 WEST SALT LAKE CITY, UTAH 1. INTRODUCTION On behalf of C.W. Land, the owner of The Beverly (Facility), Wasatch Environmental, Inc., (Wasatch) has prepared this work plan for Replacement Monitoring Well Installation to continue evaluating the residual chlorinated solvent impacts to groundwater following remediation activities at the Facility. 1.1 Facility Description The Facility has recently been redeveloped as a residential apartment complex located at 63 South 600 West, in Salt Lake City, Utah as depicted on Figure 1. The Facility occupies a single 0.90-acre parcel (Parcel Number 15-01-105-007). The Facility is surrounded by mixed commercial and residential land use. A Facility vicinity map is presented as Figure 2. 1.2 Facility Background Under the regulatory oversight of the Utah Department of Environmental Quality, Division of Waste Management and Radiation Control (DWMRC), an environmental response project, as defined in Section 57-25-102(5) of the Utah Code Annotated, approved by the DWMRC for The Beverly, has been undertaken to address a release, prior to owner’s purchase of the real property on which The Beverly is located. Soil and shallow groundwater of chlorinated solvents and/or semi-volatile organic compounds (SVOCs) that likely originated from former occupants of the buildings were removed in 2019, which included American Barrel (at least 1970s to 1980s) and Myers Container (1990s). The Owner purchased The Beverly on July 30, 2019. During November 2019, the former buildings located on the Facility were removed. During demolition and slab removal activities, and under the direction and approval of the DWMRC, numerous soil characterization samples were collected beneath features where releases to the subsurface could have potentially occurred. These areas included oil/water separators, trench floor drains, pits, underground piping, and a former waste management area. Soil samples were analyzed for volatile organic compounds (VOCs) and SVOCs. Based on the analytical results from the investigation activities, two areas of SVOC -impacted soil at concentrations that exceeded U.S. Environmental Protection Agency (EPA) Regional Screening Levels (RSLs) for Residential Soil were identified. In January 2020, two excavations were completed in the areas of SVOC impacts. Soil confirmation samples were collected from each excavation and no VOCs or SVOCs were detected in the soil confirmation samples at concentrations exceeding their respective U.S. EPA RSLs for Residential Soil. Based on analytical results from previous subsurface investigations conducted at the Facility, it appeared that a small tetrachloroethene (PCE) plume with concentrations exceeding its U.S. EPA federal Maximum Contaminant Level (MCL) was present beneath the southern portion of the Facility. Wasatch supervised the installation of five groundwater monitoring wells MW-1 through MW-5 at the Facility in January 2021 and May 2021 (see Figure 3). The first round of groundwater monitoring activities was conducted on the Facility in May 2021. Based on the analytical results, the groundwater sample (MW-1) collected near the western property boundary exhibited concentrations of PCE at 110 micrograms per liter (µg/L) and trichloroethene (TCE) at 5.54 µg/L, both of which exceed their U.S. EPA MCL of 5 µg/L. The second round of groundwater monitoring activities was conducted in October 2021. The analytical results were consistent with those previously reported, as the groundwater sample collected from monitoring well MW-1 exhibited concentrations of PCE and TCE and 105 µg/L and 6.11 µg/L, respectively. Wasatch Environmental, Inc. Page 3 Based on the depth to groundwater measurements, the groundwater flow direction is to the west. Given the groundwater data, it appeared that the groundwater impacts originate from the southern portion of the Facility and may be migrating off-site. Based on the results of the groundwater sampling, Wasatch recommended the installation of an additional monitoring well off-site to the west to evaluate if significant chlorinated solvent impacts to groundwater are migrating off-site. In April 2022, Wasatch supervised the installation of off-site monitoring well MW-6 (see Figure 3). The analytical results indicate that TCE was detected in the groundwater sample collected from monitoring well MW-6 at a concentration of 1.4 µg/L, below its U.S. EPA MCL of 5 µg/L. PCE was detected in the groundwater sample collected from monitoring well MW-6 at a concentration of 12.2 µg/L, which slightly exceeded its U.S. EPA MCL of 5 µg/L; however, it was Wasatch’s opinion that this off-site concentration was not significant enough to warrant further off-site investigation. Additionally, these concentrations were significantly lower than previous concentrations detected in the groundwater samples collected from monitoring well MW-1 located along the western edge of the Facility. During the December 2023 sampling event, monitoring MW-1 well could not be located. According to C.W. Land personnel, a bench was inadvertently installed on top of monitoring well MW -1. Pursuant to conversation with Utah DWMRC personnel, Wasatch has prepared this work plan to install a replacement monitoring well in the area former monitoring well MW-1. 1.3 Objective The objective of the monitoring well installation is to install a replacement monitoring well at the western Facility boundary so that future groundwater monitoring events can continue to evaluate chlorinated solvent impacts to groundwater at the hydraulically downgradient Facility boundary. 2. GROUNDWATER MONITORING WELL INSTALLATION ACTIVITIES PCE has been identified at concentrations exceeding its U.S. EPA federal MCL within the groundwater beneath the Facility near the west and hydraulically downgradient boundary of the Facility. Previously installed monitoring well, MW-1, located at the western and hydraulically downgradient Facility boundary is no longer assessable due to a bench being installed over the monitoring well. Therefore, Wasatch proposes installing a replacement monitoring well (MW-1R) in the public right-of-way near the location of former monitoring well MW-1 so that long-term groundwater monitoring at the Facility can continue to be further evaluated as part of the Site Management Plan (SMP) that was approved by the Utah DWMRC. The monitoring well will be installed using direct-push techniques with a GeoProbe 7822 drill rig. Wasatch proposes installing the monitoring well as depicted on Figure 3. Prior to installation of the monitoring well, Wasatch will obtain the necessary permits and traffic control plan from the City of Salt Lake. The monitoring well will consist of 2-inch inner-diameter (I.D.) polyvinyl chloride (PVC) casing with 10- foot, 0.010-slot, pre-packed sand screen. The monitoring well surface completion will be flush mount. Based on depth-to-groundwater at the Facility, Wasatch anticipates the total depth of the monitoring well will be approximately 15 to 25 feet below ground surface. Subsequent to monitoring well installation, the monitoring well will be developed to remove fines from the well screen using a peristaltic pump. The monitoring well top-of-casing elevation will be surveyed to within 0.01-foot using an on-site benchmark (MW-3) assigned an arbitrary value of 100.00 feet above mean sea level. Once groundwater monitoring well installation activities are completed, Wasatch will deploy a HydraSleeve no-purge sampler in monitoring well MW-1R in preparation for the next sampling event. Wasatch Environmental, Inc. Page 4 3. WASTE CHARACTERIZATION SAMPLING AND ANALYSIS Wasatch anticipates generating a small quantity of groundwater waste during the groundwater monitoring well development activities. Groundwater generated during monitoring well development activities will be properly stored, labeled, characterized, transported, and disposed. 4. HEALTH AND SAFETY All groundwater monitoring well installation and monitoring activities at the Facility would be performed by Wasatch in accordance with Wasatch’s general health and safety policy. A site-specific health and safety plan has previously been prepared to address specific health and safety concerns and establish protocols for conducting work related activities in a safe manner. 5. PROJECT SCHEDULE Wasatch proposes completing the monitoring well installation activities in early to mid-2024. Ongoing monitoring well sampling activities will be completed subsequent to monitoring well installation and are scheduled for October 2024. DATE: 7/20/2021PROJECT NO.: 2241-002CEnvironmental Science and Engineering Facility Layout Map The Beverly 45-53 South 600 West Salt Lake City, Utah FIGURE 1 Scale: 1” equals approximately 40 feet Approximate Property Boundary DATE: 7/20/2021PROJECT NO.: 2241-002CEnvironmental Science and Engineering Scale: 1” equals approximately 400 feet Facility Vicinity Map The Beverly 45-53 South 600 West Salt Lake City, Utah FIGURE 2 Site Location North Temple I- 1 5 Vivint Smart Home Arena 100 South 60 0 W es t The Gateway DATE: 2/27/24PROJECT NO.: 2241-002CEnvironmental Science and Engineering The Beverly 45-53 South 600 West Salt Lake City, Utah FIGURE 3 Monitoring Well MW-4 MW-2 MW-1R MW-3 MW-6 MW-5 Scale: 1-inch equals approximately 47’ Current and Proposed Replacement Monitoring Well Location Map Proposed Replacement Monitoring Well Location DATE: 01/03/2024PROJECT NO.: 2241-002CEnvironmental Science and Engineering December 14, 2023, Piezometric Surface Map The Beverly 45-53 South 600 West Salt Lake City, Utah FIGURE 2 Monitoring Well MW-4 89.41 MW-2 88.75 MW-1 MW-3 89.07 MW-6 87.55 Groundwater Flow Direction MW-5 90.04 Scale: 1-inch equals approximately 47’ Groundwater Elevation Contour 88 87.6 88.4 88.8 89.2 89.6 90