Fremont – PERALTA CROSSING (60002284)

Site History

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)”

Mountain View – MORA DRIVE (60002502)

Site History

2221-2291 MORA DRIVE, MOUNTAIN VIEW, CA 94040

Envirostor (State of California) page

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.

Google Map

Deed Restriction / Land Use Covenant:

Land Use Covenant and Agreement, Environmental Restriction 8/2/2019 

  • ACTIVITIES PROHIBITED WHICH DISTURB THE REMEDY AND MONITORING SYSTEMS WITHOUT APPROVAL
  • LAND USE COVENANT
  • MAINTAIN MONITORING OF GROUNDWATER
  • NO GROUNDWATER EXTRACTION AT ANY DEPTH WITHOUT APPROVAL
  • NOTIFY AFTER CHANGE OF PROPERTY OWNER
  • NOTIFY DAMAGES TO REMEDY AND MONITORING SYSTEMS UPON DISCOVERY
  • NOTIFY PRIOR TO DEVELOPMENT
  • NOTIFY PRIOR TO SUBSURFACE WORK

POTENTIAL CONTAMINANTS OF CONCERN

TETRACHLOROETHYLENE (PCE)
TRICHLOROETHYLENE (TCE)

Envirostor disclaimer

HEWLETT-PACKARD (620-640 PAGE MILL ROAD) PALO ALTO, CA

Groundwater map showing extent of pollution under neighborhoods in Palo Alto

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 2019 https://www.nbcbayarea.com/on-air/as-seen-on/toxic-plumes_-the-dark-side-of-silicon-valley_bay-area/87485/

EPA Superfund Site Link 620-640 PAGE MILL RD PALO ALTO, CA 94304-1001
Geotracker State of California website link for the site

POTENTIAL CONTAMINANTS OF CONCERN
1,1,1-TRICHLOROETHANE (TCA), ARSENIC, TETRACHLOROETHYLENE (PCE), TRICHLOROETHYLENE (TCE)

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.

Google Map Reference

Geotracker map for 5/1/2018 showing the toxic wastes sites in the area area affected and the well sites to monitor the groundwater.

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.

 

Map Source: The Chemical Legacy of Old Silicon Valley, NBC Bay Area, Map Editor Scott Pham

Cupertino – Apple Headquarters and Kaiser Pernamente on the INTERSIL (DTKM) (SL720641214) EPA Superfund Tri-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 2019 https://www.nbcbayarea.com/on-air/as-seen-on/toxic-plumes_-the-dark-side-of-silicon-valley_bay-area/87485/

EPA Superfund Site: INTERSIL INC./SIEMENS COMPONENTS CUPERTINO, CA

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?

I know Apple does not have daycare at their facility they would not be stupid enough to do such a thing. I find it strange that people are willing to work on a toxic waste site. But I guess they know what they are doing. Surely Apple would inform everyone who has access to the site, including delivery drivers as they are required by the deed restrictions? Continue reading “Cupertino – Apple Headquarters and Kaiser Pernamente on the INTERSIL (DTKM) (SL720641214) EPA Superfund Tri-Site”

Google HQ Mountain View California

A map made in 2014 by Arcadis that depicts the well locations on the site
Mountainview Voice Article on the TCE Vapor Intrusion with Map that covers the Google Site. https://www.mv-voice.com/news/2018/06/08/epa-sets-sights-on-tce-vapor-intrusion

EPA information on the site

Revision No. 1 to Proposed Groundwater Self-Monitoring Plan (SMP) for the
2018 Annual Monitoring Event for the Spectra-Physics Teledyne Semiconductor
Superfund Site (the Site) comprised of the Former Teledyne Semiconductor and
Former Spectra-Physics Lasers, Inc., Sites Located in Mountain View, California
Groundwater Contamination Map Toxic Plumes Map Source: The Chemical Legacy of Old Silicon Valley, NBC Bay Area, Map Editor Scott Pham 2019 https://www.nbcbayarea.com/on-air/as-seen-on/toxic-plumes_-the-dark-side-of-silicon-valley_bay-area/87485/

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.

Google Map Reference

Geotracker document explaining the toxic groundwater plume encompassing the Googleplex with maps describing all of the toxic waste sites in the Teledyne/Spectra-Physics site (SL721281224)
POTENTIAL CONTAMINANTS OF CONCERN
OTHER CHLORINATED HYDROCARBONS, TETRACHLOROETHYLENE (PCE), TRICHLOROETHYLENE (TCE), VINYL CHLORIDE

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

Geotracker Deed Restrictions for Teledyne/Spectra-Physics site Superfund Site Continue reading “Google HQ Mountain View California”