The City of Seattle has contracted with SoundEarth to perform Phase I and Phase II ESAs for the purpose of property acquisition. To date, SoundEarth has completed 16 Phase I ESAs, seven Phase II ESAs, and a Remedial Investigation to delineate the extent of metals, polyaromatic hydrocarbons, and petroleum hydrocarbons in soil and groundwater. To date, 19 projects have been assigned under this contract. Additional services under this contract include Environmental Assessments; hazardous material evaluations (lead, asbestos, mold, etc.); NEPA/SEPA evaluations and determinations; environmental permitting (upland and in-water permitting, stormwater permitting, etc.); UST site assessments and decommissioning; environmental remediation; sediment sampling and permitting; cost recovery and litigation support; and contaminated stormwater management.
For a property on Myers Way, SoundEarth has prepared an RI, FS, and CAP for a site that covers approximately 7.8 acres of land. The RI/FS/CAP was prepared for submittal to Ecology in accordance with MTCA and associated cleanup regulations. SoundEarth conducted a Phase I ESA confirming presence of soil and groundwater impacts from fill material beneath the property as a recognized environmental condition. SoundEarth later conducted a Phase II ESA on and upgradient of the property to further assess the environmental quality of soil and groundwater. SoundEarth advanced 19 borings and 17 groundwater monitoring wells. The risk assessment determined the primary chemicals of concern are arsenic, cadmium, and lead in soil and groundwater. Upon completion of the RI and preparation of a conceptual site model, an FS was completed to develop and evaluate Remedial Action alternatives. The CAP, including the Sampling and Analysis and Quality Assurance Plan, and the Property-Specific Health and Safety Plan, was prepared based on the results of the FS and disproportionate cost analysis and presents the Remedial Design methods proposed to address the contaminated soil and groundwater beneath the Property. Performance and confirmational groundwater Monitoring would be conducted at the proposed compliance points following the placement of the CAP. Quarterly groundwater Monitoring will continue for four consecutive events to confirm concentrations of COCs in groundwater are stable or decreasing. Annual groundwater Monitoring will continue for four consecutive years following completion of quarterly Monitoring, at which time a No Further Action determination for the Site would be requested from Ecology and the wells would be decommissioned.