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  • PHASE I ENVIRONMENTAL SITE ASSESSMENT REPORT

    SOUTHEAST ELEMENTARY SCHOOL

    134 WARRENVILLE ROAD

    MANSFIELD CENTER, CONNECTICUT

    FOR TOWN OF MANSFIELD

    C/O COLLIERS INTERNATIONAL 135 NEW ROAD

    MADISON, CONNECTICUT

  • March 22, 2019

    Town of Mansfield c/o Colliers International Mr. Scott Pellman, AIA 135 New Road Madison, CT 06443

    RE: Phase I Environmental Site Assessment Southeast Elementary School 134 Warrenville Road Mansfield Center, Connecticut Eagle Project No. 19-046.12T1

    Dear Mr. Pellman:

    Eagle Environmental, Inc. (Eagle) completed a Phase I Environmental Site Assessment for the Southeast Elementary School located at 134 Warrenville Road in Mansfield Center, Connecticut (the “Site”). The Phase I Environmental Site Assessment was performed in general accordance with American Testing and Materials (ASTM) standards E1527-13 and meets EPA’s All Appropriate Inquiry (AAI) standard. This assessment has revealed evidence of two (2) historic and one (1) recognized environmental condition (HRECs and REC) in connection with the property at the time of this report.

    Eagle recommends a Phase II environmental site investigation to assess if a release of oil and/or hazardous substances have occurred at the two (2) HRECs and one (1) REC.

    In our opinion, the Site does not appear to qualify as an “Establishment” as defined by the Connecticut Property Transfer Law.

    Please contact us directly if you have any questions related to the report.

    Sincerely, Eagle Environmental, Inc.

    Report Prepared By: Kristi Gagnon Environmental Consultant II

    Report Reviewed By: Martin Brogie, LEP

  • EXECUTIVE SUMMARY

    Eagle Environmental, Inc. (Eagle) conducted a Phase I Environmental Site Assessment (ESA) at Southeast Elementary School located at 134 Warrenville Road in Mansfield Center, Connecticut (hereinafter referred to as “the Site”). This Phase I ESA was performed in accordance with the scope and limitations of American Society for Testing and Materials (ASTM) standards E1527- 13 and meets EPA’s All Appropriate Inquiry (AAI) standard. The Phase I ESA included an environmental databases search, review of local, state, and federal regulatory agency files, and a limited reconnaissance of the Site and vicinity for potential off-site contamination sources. No sampling or other intrusive activities were conducted as part of the Phase I ESA. Additionally, an evaluation for the presence of suspected asbestos-containing material (ACM), lead-based paint (LBP), poly-chlorinated biphenyls (PCB) containing building materials or radon gas was not included in the scope of work for the ESA.

    The major findings of the Phase I ESA are as follows:

    • The Site consists of one (1) parcel of land totaling 16.1-acres;

    • The Site is improved by one (1) single-story masonry building of approximately 34,594 square feet originally constructed in 1957. Construction consists of slab-on-grade with a basement boiler room and pipe tunnels, masonry framing, pitched and flat roofing and a septic system. Two (2) additions were added to the east end of the school in the late 1960s in early 2000s. Construction consists of slab-on-grade, masonry/wood framing and flat roofing. The Site includes 41,500 square feet of asphalt paving to the north and south of the building. An approximate 600 square foot concession stand with a bathroom was constructed in 2009 northeast of the Site building. Construction consists of slab-on- grade, wood framing, pitched roofing and an independent septic system. A storage shed, greenhouse/storage shed and a masonry block well pump house also exists on-Site;

    • The school building includes twenty-three (23) classrooms, one (1) multi-purpose room (cafeteria, gymnasium & auditorium), one (1) kitchen, four (4) custodial closets throughout the building, one (1) boiler room in the basement and one (1) maintenance bay adjacent to the boiler room. Approximately 150 students, grades Pre-K through 4th grade, utilize the building with associated faculty;

    • The Site is currently occupied by Southeast Elementary School. Historically, the Site was utilized for agricultural fields with mixed raw land until the Site building was constructed in 1957;

    • The Site building utilizes an on-Site septic system, onsite water supply wells, and #2 fuel oil for heating;

    • One (1) approximate 10,000-gallon sti-P3 #2 heating oil underground storage tank (UST) exists on the north side of the school building. The UST was installed 07/01/1988 and has exceeded the thirty (30) year life expectancy of sti-P3 USTs. A former 10,000-gallon

    PHASE I ESA ES-1 MARCH 2019

  • heating oil UST was reportedly located within the same area installed in 1957 and removed from the ground 07/01/1988;

    • One (1) backup generator with a self-contained diesel tank exists north of the school within a wood enclosure. Staining on or adjacent to the generator was not observed;

    • One (1) concrete pad-mounted transformer exists north of the school within a wood enclosure. No label indicating the presence or absence of PCB containing di-electric fluid was observed;

    • The Site is listed on the CT UST, SPILLS and FINDS databases contained in an EDR environmental database report for two (2) registered USTs and a release of 2-gallons of #2 fuel oil in 2015;

    • There is low potential that a vapor encroachment condition VEC exists at the Site based upon a lack of documented releases within the area and current and historic chemical utilization/storage on and off-Site;

    • An ACM inspection was not included as part of this Phase I ESA, however, suspect ACM may exist within the pipe tunnels below the school and within inaccessible areas (above ceilings/behind walls). The Site building appeared to have been recently renovated with new floor tile; and,

    • The Site does not appear to qualify as an “Establishment” as defined by the Connecticut Transfer Act due to a lack of observed evidence that on or after November 19, 1980 the Site generated more than one hundred (100) kilograms of hazardous waste in any one month. Advice from legal counsel is suggested to confirm a final determination.

    Eagle identified one (1) significant data gap, as defined by ASTM E1527-13, during the Site reconnaissance and records review that would significantly affect the ability of Eagle to identify recognized environmental conditions in connection with the Site.

    One (1) former 10,000-gallon heating oil UST (Tank ID A1) was reportedly located within the same area as the current UST and removed from the ground June 1, 1988. No additional information was available to review. Specifically, a closure report or analytical summary of soil and/or groundwater results from the tank removal activity was not observed at the Town of Mansfield Municipal Departments or at CTDEEP at the time of this report.

    This assessment has revealed evidence of two (2) historic and one (1) recognized environmental conditions in connection with the Site at the time of this report.

    HREC No. 1: Septic System Leaching Fields Southeast Elementary School was constructed in 1957 with an on-Site septic system and leaching fields located southeast of the building. If halogenated solvents (commonly found in floor strippers and cleaners prior to 1980) or other products potentially containing contaminant compounds were previously used in the building, the constituents and residual rinse water may

    PHASE I ESA ES-2 MARCH 2019

  • have been disposed of into the septic system with potential to impact soil and/or groundwater within the vicinity of the leaching fields. HREC No. 2: Underground Storage Tank A1 One (1) former 10,000-gallon heating oil UST (Tank ID A1) was reportedly located within the same area as the current UST and removed from the ground 07/01/1988. No additional information was available to review. Specifically, a closure report or analytical summary of soil and/or groundwater results from the tank removal activity was not observed at the time of this report. Should a release of fuel oil have occurred, there is potential for an impact to soil and/or groundwater unless official documentation can prove a release had not occurred. REC No. 1: Underground Storage Tank A1R1 One (1) 10,000-gallon sti-P3 #2 fuel oil UST (Tank ID A1R1) exists on-Site north of the building. The UST was installed 07/01/1988 and has exceeded the thirty (30) year life expectancy of sti-P3 USTs. Mansfield Facilities Department provided a copy of the cathodic protection monitoring log dated June 15, 2018 indicating the UST passed testing. It is unclear however, if just the UST was cathodically tested or if the return/supply piping was included. Until the UST is removed from the ground, or abandoned in place, there is potential for a release to soil and/or groundwater within the vicinity of the UST and associated piping.

    Based on the findings and conclusions discussed herein, Eagle offers the following recommendations:

    Eagle recommends conducting a Phase II Environmental Site Investigation (ESI) to assess the presence of a release of regulated substances to soil and/or groundwater at the Site to address the two (2) HRECs and one (1) REC observed in connection with the property.

    Eagle also recommends the timely removal and replacement of the underground storage tank (UST) A1 and associated piping due to the exceedance of the thirty (30) year life expectancy. Prior to any tank removal activities, thir

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