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Home My WebLink About2023 - Ascon Landfill Site - Community Notice - Department o CLEANUP PROGRAM August 2023 C 0 MM U N2111112Y2D: C;T`; C; - ,' Department of Toxic Substances Control-Our mission is to protect,Ga nia's.people,communities, and environment from toxic substances,to enhance economic vitality by restoring contaminated land, and to compel manufacturers to make safer consumer products. Ascon Landfill Site Update on Odor Control Technologies Pilot Test Work 21641 Magnolia Street, Huntington Beach, California The Department of Toxic Substances Control (DTSC) is 1 L providing an update on the ongoing pilot test field work at Hamilton Ave I the Ascon Landfill Site located at 21641 Magnolia Street — • in Huntington Beach. This update provides information regarding a DTSC-approved addendum to the ' Engineered Misting Containment (EMC) Pilot Test • 3 workplan with an additional test area, as shown in the ASCON `° figure to the right. SITE c Site Background coal. The Site is a vacant 38-acre parcel at the southwest corner of Hamilton Avenue and Magnolia Street in Huntington Beach, California. The Site operated as an active landfill from approximately 1938 to 1984 and in its ■ early years of operation received waste from oil drilling operations, including drilling muds and wastewater brines. Additional EMC pilot test area Site cleanup began in January 2019 and was paused in II Completed EMC pilot test area June 2019 in response to community concerns about nuisance odors generated during the cleanup. Pilot • Current SVE pilot test areas testing for odor control is being conducted as part of DTSC-mandated measures to address those odor concerns before restarting full scale remediation. Update on Pilot Testing Work In coordination with DTSC and the South Coast Air Quality Management District (SCAQMD), the Ascon Responsible Parties are testing two odor mitigation technologies, Engineered Misting Containment (EMC) and Soil Vapor Extraction (SVE), to evaluate these methods for limiting odors during future excavation work. The pilot work is approximately 50 percent complete, and the results will guide odor mitigation strategies when full scale cleanup is resumed. Learn more about the two odor mitigation technologies in the DTSC Pilot Work Community Update on EnviroStor, envirostor.dtsc.ca.gov. Hearing impaired individuals may use the California Relay Service at 711 or 800-735-2929 TTYNCO/HCO to voice. e• DE 0 '454.f. Additional information on DISC sites can be found through our EnviroStor. (rev.5-2020) EMC: The Ascon team has completed EMC pilot work in the southern portion of the Site. This work occurred from July 3 through August 8 and approximately 5,000 cubic yards of potentially contaminated soil was excavated. Odorous soils were not encountered during the EMC pilot excavations completed to-date. SVE: The SVE pre-treatment system began operating in mid-August, and the planned excavation portion of that pilot work is scheduled to be completed at the end of October 2023. Concrete Crushing: In parallel with the pilot studies, Ascon conducted concrete crushing, constructed an access road in Lagoon 4 using non-odorous soils, and reinforced exposed geotextile in Lagoon 4 using the crushed concrete. Additional Pilot Test Work EMC must be tested in odorous soils to achieve the objectives of the EMC pilot test, however odorous soils were not encountered in the initial EMC testing areas. Therefore, DTSC has requested an additional excavation in more odorous soils. An area near the northern perimeter of the Site, shown on the map on page 1, has been identified to likely contain more odorous soils. Up to 4,800 cubic yards (CY) of soil will be excavated from this northern perimeter area, which will not exceed the total DTSC-approved volume of material to be excavated as part of the pilot test. Excavated odorous and Volatile Organic Compound (VOC)-contaminated soils will be placed in the SCAQMD Rule 1166 Treatment Cell. Excavated soils that are not odorous and are not VOC-contaminated may be placed as fill soils over Lagoon 4. . '' : 0114*, 4, , . .-.II, / ' irip / • .- Wt.i,..s.: , )11 N...4 ',4 Y Example of EMC work to be tested in the northern perimeter, other EMC variations may be tested, as appropriate. Hearing impaired individuals may use the California Relay Service at 711 or 800-735-2929 TTYNCO/HCO to voice. a • ' �i` Additional information on DISC sites can be found through our EnviroStor. (rev.5-2020) LI_.r- Public and Site Worker Health and Safety Measures During pilot testing, the air monitoring program has been expanded to include monitoring at additional locations. This includes on-Site monitoring upwind and downwind from the work area, and at six Site perimeter locations for odor, total VOCs, and reduced sulfur compounds during excavation. Additionally, dust concentrations will continue to be monitored at the Site perimeter and odor will be monitored by dedicated personnel in the surrounding neighborhoods . during working hours. Ascon personnel are identifiable by their blue shirts and safety vests as shown in the picture to the right. ',. • lift li V 7. ,i Perimeter air quality monitoring stations have been equipped with electronic communication systems, so that results throughout the workday will be reported on asconhb.com for the community to view within two hours of data collection. Response action thresholds have . been established in accordance with SCAQMD permit requirements and health-based screening levels for each of the monitored parameters. If those thresholds are reached, response actions • ; , would include stopping work and reevaluating next steps. Ascon community odor monitor Analytical samples will be collected from the on-site air monitoring stations and at the Site perimeter for laboratory analysis of VOCs and sulfur compounds during working hours. Additionally, metals and polycyclic aromatic hydrocarbons (PAHs) will be analyzed in dust samples collected from three Site perimeter stations (one upwind and two downwind) twice per week. DTSC will be onsite to oversee the pilot test during excavation activities and will review all air quality monitoring results. The Ascon team will continue air quality monitoring at the Site perimeter and off-Site stations for dust and VOCs 24 hours a day, 7 days a week. Air monitoring results during the pilot test have not indicated a risk to public health. Next Steps: • October/November 2023, complete on-site pilot testing. • Late 2023/early 2024, Ascon reports pilot test findings and submits Remediation Restart Workplan. • Upon DTSC approval of the Restart Workplan and a public meeting, full-scale remediation will resume and is estimated to last from 18 to 24 months. Ascon Pilot Work Resources: • DTSC Open House Poster Boards • DTSC Virtual Community Meeting Presentation • DTSC Virtual Community Meeting Recording • DTSC Community Meeting FAQs For more information, please visit: https://www.envirostor.dtsc.ca.gov/public/ (enter "Ascon" and select from drop-down menu) and find additional information on the project and pilot work at asconhb.com. Hearing impaired individuals may use the California Relay Service at 711 or 800-735-2929 TTYNCO/HCO to voice. 9 ® ..,.. '41iY' Additional information on DTSC sites can be found through our EnviroStor. (rev.5-2020) t o- If you have any questions about this project, please contact the following DTSC staff: Clayton Larkins Jessica Anderson Project Manager Public Participation Specialist (657) 777-9816 (714) 484-5354 Clayton.Larkins(o�dtsc.ca.gov Jessica.Anderson(a dtsc.ca.gov For media inquiries only: Elizabeth Leslie Gassaway, WANT MORE INFORMATION? Public Information Officer Visit asconhb.com and sign up for e-mail (916) 282-8941 notifications Elizabeth.Ieslie-gassaway c(Ddtsc.ca.gov Questions on Air Quality and Dust Monitoring: QUESTIONS OR CONCERNS? Contact South Coast Air Quality Management Please call the Ascon project hotline, District at 1-800-CUT-SMOG (288-7664) (714) 388-1825, or email info(a�asconhb.com • Hearing impaired individuals may use the California Relay Service at 711 or 800-735-2929 TTYNCO/HCO to voice. 0 xjr' Additional information on DISC sites can be found through our EnviroStor. (rev.5-2020) EL o- CLEANUP PROGRAM MAY 2023 COMMUNITY UPDATE Department of Toxic Substances Control-Our mission is to protect the people, communities,and environment of California from harmful chemicals by cleaning up contaminated sites,enforcing hazardous waste laws,and compelling the development of safer products. Ascon Landfill Site Pilot Testing of Odor Control Technologies to Restart Remediation 21641 Magnolia Street, Huntington Beach, California The Department of Toxic Substances Control (DTSC) invites you to an informational community open house and a virtual presentation to provide an update on the upcoming field pilot testing to be conducted at the Ascon Landfill Site, located at 21641 Magnolia Street in Huntington Beach. An in-person community open house will be held at the Huntington Beach Senior Center from 4:00 - 6:00 p.m. where DTSC representatives will share information one-on-one and answer your questions on the project and upcoming work. The open house will be followed by a virtual presentation from 7:00 - 8:30 p.m. via Zoom. Community Meeting Announcement Please join DTSC for an open house and a virtual presentation on upcoming pilot testing at the Ascon Landfill Site. DTSC is committed to keeping the community informed on major activities related to the Site. Date: Wednesday, May 31, 2023 Open House: The open house will be held from 4:00 to 6:00 p.m. at: Senior Center in Central Park, 18041 Goldenwest St, Huntington Beach, CA 92648 Virtual Meeting: The Virtual Presentation will be held on Zoom from 7:00 to 8:30 p.m. Where: https://dtsc-ca-gov.zoom.us/j/89510726948 Meeting Call in: +1 669 444 9171 US Webinar ID: 895 1072 6948 CI. .,,_ 0 A copyof the presentation will be available on the DTSC EnviroStor Database: . ' �..lt The virtual presentation will be recorded. If you do not have the opportunity to view this live event, it will be available to view approximately one week after the live event on our You Tube channel(DTSCGreen) • Hearing impaired individuals may use the California Relay Service at 711 or 800-735-2929 TTYNCO/HCO to voice. a 17`.;. 0 ` Y Additional information on DISC sites can be found through our EnviroStor. (rev.5-2020) 0_ r, r �.- Site Background The Site is a vacant 38-acre parcel at the southwest corner of Hamilton Avenue and Magnolia Street in Huntington Beach, California. The Site operated as an active landfill from approximately 1938 to 1984 and in its early years of operation received waste from oil drilling operations, including drilling muds and wastewater brines. From 1971 to 1984, materials deposited onsite included asphalt, concrete, metal, soil, and wood. Neighboring land uses include a community park, high school, residential areas, light industrial operations, a flood control channel, and a power generating plant. Site cleanup began in January 2019 and was paused in I L June of the same year in response to community concerns Hamilton Ave about nuisance odors generated during the cleanup. The - — pilot testing is being conducted as part of DTSC-mandated measures to address those concerns before restarting full- ' • scale remediation. 3 go Upcoming Onsite work ASCON In coordination with DTSC and the South Coast Air Quality SITE S Management District (SCAQMD), the Ascon Responsible cn Parties will test two odor mitigation technologies onsite, Engineered Misting Containment (EMC) and Soil Vapor Extraction (SVE), to evaluate these methods for limiting odors during future excavation work. The field tests will assess odor mitigation performance during small-scale •Planned SVE pilot test areas onsite excavations at the locations shown on the map to the right. The results will guide odor mitigation strategies when full- II Planned EMC pilot test area onsite scale cleanup is resumed. Engineered Misting Containment (EMC) EMC uses a non-toxic spray-on cover material, Posi-Shell®, and non-toxic spray-on odor suppressant, CupriDyne® Clean, to contain odors. Additionally, EMC uses mesh awnings and barrier walls to prevent sprayed materials from leaving the Site during application. The EMC pilot test will be conducted within the interior of the Site, where application methods and mesh wall configurations (see images below) will be evaluated under different operational conditions to assess odor and mist containment performance during excavation. Up to 10,000 cubic yards may be excavated during the EMC pilot work. EMC variations planned for pilot testing IFIIPPF-- . •-1,- ;4 '' - '' . 0 . , . Hearing impaired individuals may use the California Relay Service at 711 or 800-735-2929 TTY/VCO/HC0 to voice. ,c,b, el Er . it si* Additional information on DISC sites can be found through our EnviroStor. (rev.5-2020) o_.r,- Soil Vapor Extraction (SVE) SVE uses a vacuum to remove vapors from below the ground through wells drilled into known odorous soils. The extracted vapors are filtered through an above ground treatment system with granular activated carbon (GAC) prior to release to the outside air. The treatment system is permitted by SCAQMD and monitored to ensure proper performance. SVE performance will be assessed by monitoring and comparing odor during small excavations made before running the SVE system, immediately after running the SVE system for one month, and again one month after the SVE system is turned off. In addition to SVE treatment, Posi-Shell® and CupriDyne® Clean will also be applied during excavations to control odor. Up to 400 cubic yards may be excavated during SVE pilot work. Exhaust Vaporn iquid aaa nRelease Separator ♦ Vacuum i Sample location Pump for VCIC monitoring and UUC rncnitonng _ ♦ ♦ Vapor Extraction Well Soil Vapor Flow • Pilot Test Work Timeline The pilot test field work for EMC is expected to take approximately five weeks, and the SVE pilot field work is expected to take approximately 12 weeks, with some additional time for mobilization and demobilization of equipment and materials. The two pilot tests can be conducted at the same time, for a total duration of approximately 12 weeks of field work. The pilot testing work is anticipated to begin in June 2023. During the 12-week pilot test period, Ascon will also complete onsite concrete crushing, access road construction and Lagoon 4 reinforcement. This work was approved as part of the Remedial Action Plan and is not anticipated to generate odors. Non-odorous soils excavated during the EMC pilot test will be used to construct an access road on Lagoon 4 to place crushed concrete over currently exposed geotextile. All air monitoring measures, as discussed below, will be in place during this work, which is expected to take approximately two weeks. Public and Site Worker Health and Safety Measures On-site and off-site air monitoring for Volatile Organic Compounds (VOCs) and dust concentrations has been conducted during previous phases of active work in accordance with DTSC and SCAQMD requirements, and 24 hours a day, 7 days a week for the majority of the current remediation pause. Air monitoring results to-date have not indicated a threat to public health. During pilot testing, the air monitoring program will be expanded to include monitoring at onsite • Hearing impaired individuals may use the California Relay Service at 711 or 800-735-2929 TTYNCO/HCO to voice. 1 1 1 Dr. . 9 ` Additional information on DISC sites can be found through our EnviroStor. (rev.5-2020) O: r,. locations upwind and approximately 100 feet downwind from the work area, as well as at six Site perimeter locations for odor, total VOCs, and reduced sulfur compounds during excavation. Additionally, dust concentrations will continue to be monitored at the Site perimeter and odor will be monitored by dedicated personnel in the surrounding neighborhoods during working hours. Response action thresholds have been established in accordance with SCAQMD permit requirements and health-based screening levels for each of the monitored parameters. Response actions include stopping excavation. Analytical samples will be collected from the air monitoring stations onsite and at the Site perimeter for laboratory analysis of VOCs and sulfur compounds during working hours. Additionally, metals and polycyclic aromatic hydrocarbons (PAHs) will be analyzed in dust samples collected from three Site perimeter stations (one upwind and two downwind) twice per week. DTSC will be onsite to oversee the pilot test during excavation activities and will review all air quality monitoring results. In addition, perimeter air quality monitoring stations have been equipped with electronic communication systems so that results throughout the workday will be reported on asconhb.com for the community to view within two hours of data collection. Recent and Upcoming Project Activities and Milestones: • Established a near-real time air monitoring telemetry system for use during active onsite work, with ongoing data to be posted on the project website, asconhb.com. • Introduced AsconAlert, an opt-in notification system that can send emergency and informational notifications to the community via text or email. • Pre-pilot test public meeting scheduled for May 31, 2023. • June 2023, begin -12 weeks of odor mitigation technology pilot testing. • September 2023, complete onsite pilot testing. • November 2023, Ascon reports pilot test findings and submits Remediation Restart Workplan. • January 2024, restart of full-scale remediation (estimated to last 18 to 24 months) pending DISC approval of the Restart Workplan and a public meeting. For more information, please visit: https://www.envirostor.dtsc.ca.gov/public/ (enter "Ascon" and select from drop-down menu) If you have any questions about this project, please contact the following DTSC staff: Clayton Larkins Jessica Anderson Project Manager Public Participation Specialist (657) 777-9816 (714) 484-5354 Clayton.Larkins(c�dtsc.ca.gov Jessica.Anderson andtsc.ca.gov For media inquiries only: Elizabeth Leslie-Gassaway, WANT MORE INFORMATION? Public Information Officer Visit asconhb.com and sign up for (916) 282-8941 e-mail notifications Elizabeth.leslie-gassaway(c�dtsc.ca.gov Questions on Air Quality and Dust QUESTIONS OR CONCERNS? Monitoring: Please call the Ascon project hotline, Contact South Coast Air Quality Management (714) 388-1825, or email info asconhb.com. District at 1-800-CUT-SMOG (288-7664) • Hearing impaired individuals may use the California Relay Service at 711 or 800-735-2929 TTYNCO/HC0 to voice. a l7 E �i ` �;J' Additional information on DISC sites can be found through our EnviroStor. (rev.5-2020) I°