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Tag Archives: closure
Soil and Soil Gas Investigation, San Fernando Valley, California
When seven production wells operated by a Southern California water purveyor reported concentrations of hexavalent chromium and perchlorate above regulatory limits for drinking water, a multiagency effort was conducted to identify the sources.
Posted in All Posts, Investigation, Projects
Tagged 14-dioxane, aerospace, chrome, closure, dioxane, emerging contaminants, groundwater, hexavalent, intrusion, plan, sampling, soil, soil gas, TCE
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Soil Vapor Extraction and Air Sparge Operation, California Refinery
A global oil and gas corporation commissioned the operation and maintenance of a soil and groundwater remediation system designed an active California refinery. Continue reading
Posted in All Posts, Groundwater Remediation, Projects, Remediation, Soil Remediation
Tagged biological, closure, extraction, groundwater, plans, remedial, remediation, sampling, site, soil, SVE, treatment, water
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Closure Plans for Contaminated Sites and Regulatory Closure Negotiations
Closure plans are prepared to supplement work plans for contaminated sites when a property owner is interested in obtaining No Further Action letters from the lead regulatory agency. Closure plans provide a description of administrative and technical requirements and factors supporting closure, including cleanup goals based on indoor vapor intrusion pathways and groundwater intrusion pathways. Communicating closure strategy is effective for early regulatory approval.
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Posted in All Posts, Services
Tagged closure, extraction, intrusion, johnson-ettinger, PCE, plans, redevelopment, soil, SVE, TCE, vapor, VLEACH
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Site Closure Plan and Closure Strategy and Regulatory Support, Former Aerospace Site, Southern California
A soil vapor extraction system located at former aerospace site in Southern California had operated for a number of years. The client requested a strategy to obtain regulatory site closure. In response, a site closure plan was prepared outlining a schedule and a list of technical and administrative requirements to support site closure. The closure plan also listed methods and procedures to demonstrate that site-specific cleanup concentrations were protective of human health and groundwater.
Posted in All Posts, Projects, Remediation, Soil Remediation
Tagged closure, Contaminated, gas, Gasoline, Health, PCE, plan, retail, Risk, site, Sites, soil, Stations, Surveys, TCE, VOC, VOCs
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