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Subsurface Investigation
- Client: Swiss Valley Cleaners, San Leandro, California
This project involved a subsurface investigation beneath the floor of the Swiss Valley Cleaners in San Leandro, California. An extremely cost-effective approach for evaluating the subsurface conditions prior to an up-coming real estate transaction was achieved by concrete coring and hand-boring at locations immediately adjacent to the existing dry cleaning machine. The results of the investigation provided the necessary documentation in order that the sale of the business could be completed.
- Client: Mare Island Naval Base, Vallejo, California
This project involved project management of a soil and groundwater study in and around the chrome plating shop at Mare Island Naval Base in Vallejo, California. The work was conducted under sub-contract to L&W Environmental Services. The project included the installation of a number of monitoring wells, collection of soil samples, and determining the influence of nearby tidal action. The study was complicated by hard-rock geology, a significant tidal influence, the occurrence of groundwater in confined gravel lenses, and the heterogeneity of soils within fill areas.
- Client: Operating Industrial Facility, Hayward, California
A principal of Hydro Analysis managed a three-phase remedial investigation of a 4,000-foot long chlorinated solvent plume. Tasks included: coordinating cone penetrometer testing at 30 locations to evaluate subsurface lithology; collecting grab groundwater samples from 4 separate aquifers using a HydroPunch sampler; developing workplans; interfacing with of regulatory agencies; negotiating access agreements; securing permits; evaluating data; and preparing reports.
- Client: Adobe Associates, Castro Valley, California
This project involved the installation and quarterly sampling of shallow groundwater monitoring wells following underground storage tank removals at the site. Based upon analysis of groundwater sampling data, conduct of a sensitive receptors survey, and completion of a Site Closure Summary, case closure was issued by Alameda County Environmental Health and the State RWQCB. The monitoring wells have subsequently been destroyed under permit by Alameda County.
- Client: Wortman Oil Company, Canoga Park, California
This project involved contaminant plume delineation and subsequent interaction with the local State RWQCB for a service station in Canoga Park, California. The project involved the installation of several groundwater monitoring wells, installation of a large-diameter extraction well, and evaluation of plume co-mingling with an up-gradient fuel leak site.
- Client: Various Financial and Real Estate Companies, Southern California
A principal of Hydro Analysis managed and conducted comprehensive environmental investigations at 10 industrial and commercial properties in the Los Angeles area. Provided technical assistance for financial institutions and private clients prior to the sale or acquisition of the properties. Estimated remedial costs for soil and groundwater cleanup.
- Client: Dryclean USA, Walnut Creek, California
This project involved the delineation of a perchloroethylene (PCE) contamination in the soil that was caused by a disgruntled employee who dumped still bottoms into a parking lot planter area. The project involved delineation of soil concentrations by soil sample collection & analysis and then proving that the shallow groundwater had not been impacted by collecting groundwater samples at several Geoprobe locations. Soil was subsequently excavated down to a depth of ten feet, then backfilled with properly-compacted fill material. The major portion of the excavated soil was disposed of at a California Class I landfill. A small portion of the soil had to be shipped out-of-state for incineration. Upon completion of the remediation activities, a letter granting regulatory closure was issued by the Contra Costa County Environmental Health Department.
- Client: El Estero Car Wash, Monterey, California
This project involved the installation and quarterly sampling of seven shallow groundwater monitoring wells, the removal of several existing underground storage tanks and the over-excavation of a significant volume of contaminated soil. Based upon the effectiveness of the remediation effort, as demonstrated by the groundwater sampling data, a Site Closure Summary was prepared and case closure was issued by State RWQCB, Central Coast Region. The monitoring wells have subsequently been destroyed under permit by Monterey County.
- Client: Former Gasoline Station, Oakland, California
A principal of Hydro Analysis characterized the vertical and lateral extent of shallow soil contaminated with lead. Lead-contaminated soil, if excavated, was considered hazardous waste in California due to the WET results. Soluble lead did not exceed federal standards. Tasks included: coordinating extensive analytical testing to demonstrate that soluble lead was not a threat to human health or the environment; and preparing a petition to DTSC for the soil to be classified as nonhazardous.
- Client: Garza Corporation, Turlock, California
This project involved the investigation and delineation of subsurface fuel oil contamination beneath the Hospital at the Owyhee Indian Reservation, approximately 100 miles north of Elko, Nevada. The project included sample collection in fractured volcanic rock using an air rotary drill capable of slant boring. Samples were analyzed in an on-site mobile laboratory. The final report to the USEPA included soil concentration contours for fuel oil beneath the hospital, as well as presentation of several remediation alternatives.
- Client: East Bay Oil Company, Hayward, California
This project involved subsurface investigation and subsequent analysis of hydrogeologic and groundwater quality data for the East Bay Oil Chemical packaging and distribution facility located in Hayward, California. The project included plume delineation by the installation and sampling of various monitoring wells and the collection of "grab" groundwater samples from a number of HydroPunch locations, both on- and off-site. The scope of work included the investigation of tidal influence on the shallow groundwater table beneath the site. Constituents of concern included Toluene, Xylenes, Methyl Ethyl Ketone, and Chlorinated Solvents (TCA, TCE, DCE, etc.).
- Client: Syntex Pharmaceutical, Freeport, Grand Bahama Island
This project involved analysis of hydrogeologic/groundwater quality data for the Syntex Pharmaceutical facility in Freeport, Grand Bahama Island. This project involved an assessment of potential solvent and VOC contaminant migration, as well as remedial action plan development. The assessment was complicated by karst geology, a strong tidal influence, and the occurrence of groundwater in a freshwater lens.
- Client: Syntex Pharmaceutical, Clarecastle, Ireland
This project involved the analysis of hydrogeologic/groundwater quality data for the Syntex Pharmaceutical production facility in Clarecastle, Ireland. This project involved the source determination and delineation of VOC contamination in the shallow groundwater due to an on-site industrial landfill situated in a peat bog.
- Client: Syntex Pharmaceutical, Cuernavaca, Mexico
This project involved the analysis of hydrogeologic/groundwater quality data for the Syntex Pharmaceutical production facility in Cuernavaca, Mexico. The site is underlain by an extensive, highly fractured, volcanic rock. Based upon rapid response between rainstorm activity and rises in the deep groundwater table elevations, proper chemical storage, handling and spill prevention became of utmost importance in the facility management plan.
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