The Property consists of a 2.3 acre lot that is being redeveloped as multi-family residences. Soil gas at the Site has been impacted by former dry cleaning operations (Henry Miller Cleaners, Marshall Steel Cleaners, and Payless Cleaners) that used volatile organic compounds (VOCs) including the dry cleaning solvent tetrachloroethylene (PCE or perc) in its cleaning processes. The dry cleaning businesses occupied the southern portion of the onsite building and operated between approximately 1965 and 1990. Continue reading “Fremont – PERALTA CROSSING (60002284)”→
The Mora Drive Site was formerly commercial/industrial. It includes several former DTSC sites: PLESSEY #2 (43360131), PLESSEY #3 (43360135), and SYMTRON CORP. (43360124) all of which were determined to require no further action. Lennar conducted sampling in 2015, 2016 and 2017 to confirm that the site has elevated levels of tetrachloroethylene and trichloroethylene in soil gas. Lennar plans to develop the property into residential.
Deed Restrictions: ACTIVITIES PROHIBITED WHICH DISTURB THE REMEDY AND MONITORING SYSTEMS WITHOUT APPROVAL, LAND USE COVENANT, NOTIFY DAMAGES TO REMEDY AND MONITORING SYSTEMS UPON DISCOVERY
HEWLETT-PACKARD COMPANY (SL720511210) – (Geotracker MAP) Map indicating toxic waste sites in as small square boxes. If you click on each square you will be directed to the State Geotracker page for that toxic waste site.
Groundwater Contamination Map, Toxic Plumes Map Source: The Chemical Legacy of Old Silicon Valley, NBC Bay Area, Map Editor Scott Pham 2019 The red dots represent Daycare centers from 2019. NBC Bay Area had a series of maps that indicated where the toxic waste sites were located and the extent of the damage encompassing vast areas of the community but they took it down. The pollution is in the groundwater so it covers a vast area in Pink.
Apple Computer, Kaiser Permanente Child/ado Psy and Kaiser Permanente – CDRP (Chemical dependency recovery program) are located on the EPA Superfund Tri-Site where there are toxic chemicals in the ground that emerge as toxic vapor and the deed restrictions are present to stop organizations from having hospital facilities on the site. Strange thing is Kaiser Permanente operates two facilities on the site. So I would imagine that each patient must be signing a waver when they visit the facility?
The Teledyne property is part of a two-property Superfund site along with the adjacent Spectra-Physics property.
The responsible parties (RPs) for the Teledyne/Spectra-Physics site completed a Monitored Natural Attenuation (MNA) study in the off-property area north of and downgradient of the site. The MNA study concluded that natural breakdown of the chlorinated volatile organic compounds of concern is occuring naturally and at the same rate as groundwater extraction. As a result, only a few of the off-property downgradient extraction wells were operating mainly to maintain hydraulic control of the plume. The RPs completed a pilot study to test the feasibility of enhanced reductive dechlorination (ERD) and concluded that ERD is feasible with bioaugmentation of the Shallow Zone.
Within the last five years, the RPs detected elevated source areas at the Teledyne property using high resolution technology and continuously logged and screened ERD injection well boreholes. Implementing a full-scale ERD treatability study, they have been and are currently remediating the property with groundwater-CVOC levels dropping from as much as over 80,000 ug/l to low multiples of MCLs. Several rounds of ERD injections successfully cleaned up most of the Shallow Zone at the Teledyne property and the adjacent Spring Street residential area to drinking water standards and the treatability study was even more successful in the underlying Upper and Lower Intermediate Zones.
An on-property IA VI evaluation at a SpectraPhysics property in 2004 indicated no IA-CVOC contamination above the Regional Water Board’s 2008 ESLs. More recently, the RPs also assertively evaluated potential IA VI in the off-property commercial North Bayshore and residential Spring Street areas to conclude that IA VI is not occurring in most of the commercial area and is occasionally occurring in several homes in the residential area. The RPs installed sub-slab depressurization systems in the impacted on-property commercial buildings and offered the affected residents crawl space fans to address the issue.
Nine indicator chemicals were identified from approximately 30 chemicals detected in the Study Area. The nine indicator chemicals are as follows: 1,1-dichloroethane (1,1-DCA) 1.1-dichloroethylene (1,1-DCE) 1.2-dichloroethylene (1,2-DCE) tetrachloroethylene (PCE) toluene 1,2,4-trichlorobenzene (1,2,4-TCB) 1,1,1-trichloroethane (1,1,1-TCA) trichloroethylene (TCE) vinyl chloride (VC
RECORD OF DECISION, TELEDYNE SEMICONDUCTOR AND SPECTRA-PHYSICS, INC. JOINT SUPERFUND SITES MOUNTAIN VIEW, CALIFORNIA MARCH 22, 1991 U.S. ENVIRONMENTAL PROTECTION AGENCY REGION 9 p. 26 https://semspub.epa.gov/work/09/46745.pdf