arcadis u.s., inc. engineering geologist - california

SP-TDY_2018_Annual_SMP_rev_1_clean

Arcadis U.S., Inc.

2300 Clayton Road

Suite 400

Concord

California 94520

Tel 925 274 1100

Fax 925 726 0121

www.arcadis.com

Page: 1/4

Roger Papler Engineering Geologist San Francisco Bay Regional Water Quality Control Board 1515 Clay Street, Suite 1400 Oakland, California, 94612

Subject:

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

Dear Mr. Papler:

Please find below the proposed Groundwater Self-Monitoring Plan for the 2018 Annual Monitoring Event (Annual SMP) for the above referenced Site. Arcadis U.S., Inc. (Arcadis) prepared this proposal on behalf of TDY Industries, LLC, regarding the former Teledyne Semiconductor Property located at 1300 Terra Bella Avenue, Mountain View, California, and Newport Corporation, successor to Spectra-Physics Lasers, Inc. and Thermo Fisher Scientific, Inc., as indemnitor to Newport regarding the former Spectra-Physics Lasers, Inc. (Spectra-Physics) Property located at 1250 West Middlefield Road, Mountain View, California. This plan consists of a groundwater well sampling program to be conducted in the Study Area (Figure 1).

Background

Groundwater monitoring activities in the Study Area commenced in 1982. The SMP has historically been revised, as needed, to evaluate performance of continuing groundwater remediation. Ongoing monitoring has been conducted in accordance with the revised SMP submitted on February 9, 1994. Revisions to the SMP were approved on April 2, 1996, September 2003, and most recently in March of 2007 as part of the Monitored Natural Attenuation (MNA) study (LFR 2007). The Regional Water Quality Control Board (RWQCB) is currently in the process of updating the Board order for the Site, which will include a revised SMP. Arcadis, on behalf of TDY Industries, LLC, Newport Corporation and

ENVIRONMENT Date:

December 6, 2018 Contact:

Ryan Mattson Phone:

925-296-7835 Email: [email protected]

Our ref:

EM001727.0096

arcadis.com SP-TDY_2018_Annual_SMP_rev_1_clean

Mr. Roger Papler December 6, 2018

Page: 2/4

Thermo Fisher Scientific, submitted a proposed SMP for inclusion the updated Board Order. The Annual SMP (detailed below) reflects this proposed SMP.

Summary of 2018 Annual SMP and Rationale

The proposed SMP was developed to accomplish the following primary objectives: 1) establish plume stability; and 2) monitor long-term volatile organic compound [VOC] concentration trends in both plume core and distal areas. Per the proposed SMP, Arcadis proposes to sample the following wells for the 2018 annual event:

1. Thirteen (13) wells located along the central axis of the VOC plume will be used to monitor VOC concentration trends in the plume core.

2. Twelve (12) wells, including one well (PZ-5S) that also serves as a plume core monitoring well, will be used to monitor source areas at the former Spectra-Physics Property and former Teledyne Semiconductor Property. These wells will be sampled for VOCs as well as additional monitored natural attenuation (MNA) parameters, including dissolved gases (methane, ethane, and ethene) and field-measured pH, dissolved oxygen, and oxidation-reduction potential (ORP). These data will be used to evaluate anaerobic biodegradation as a potential ongoing mechanism for natural attenuation in these areas. Three of the 12 wells are located at the former Teledyne Semiconductor property and will be sampled for enhanced reductive dechlorination (ERD) treatment performance by Fishbeck, Thompson, Carr & Huber (FTCH).

3. Seventeen (17) wells will be used to monitor VOC concentration trends in distal portions of the plume. One of these wells (NB-18I) is also part of the MNA study following shutdown of extraction well E-13.

4. Twenty-five (25) wells, located at the plume boundaries, will be used to assess plume stability. One of these wells (27I) is also part of the MNA study following shutdown of extraction well E-13.

In addition, the following wells will be sampled as part of shorter-term monitoring programs that are ongoing at the Site:

1. Eight additional wells will be sampled for VOCs to support the MNA trial evaluation at the former Spectra-Physics Property. Two of the eight wells will also be sampled for additional MNA parameters.

2. In addition to the three wells included in the proposed SMP, three additional wells will be sampled by FTCH for ERD performance monitoring at the former Teledyne Semiconductor Property.

Lastly, at the request of the RWQCB, three surface water samples will be collected from historical sampling locations along Permanente Creek (near Amphitheater Parkway, Charleston Road, and West Middlefield Road) and will be analyzed for VOCs. The purpose for the one-time sampling at these locations is to current concentrations with historic results.

Table 1 contains a list of all wells proposed for the 2018 Annual SMP. The impacted groundwater is divided into three discrete “Groundwater Zones”: Shallow, Upper-Intermediate, and Lower-Intermediate. The zone in which the well is screened is indicated as “Designated Groundwater Zone”. A regionally extensive, deeper artesian aquifer is not sampled as part of the SMP.

arcadis.com SP-TDY_2018_Annual_SMP_rev_1_clean

Mr. Roger Papler December 6, 2018

Page: 4/4

Enclosures:

Tables

1. Proposed List of Wells for Performance and Natural Attenuation Monitoring 2. Summary of Proposed Analytical Methods for 2018 Annual Monitoring Event

Figures

1. Site Vicinity Map and Property Locations 2. Groundwater Monitoring Network, Shallow Zone Wells - 2018 Annual Monitoring Event 3. Groundwater Monitoring Network, Upper-Intermediate Zone Wells – 2018 Annual Monitoring Event 4. Groundwater Monitoring Network, Lower-Intermediate Zone Wells – 2018 Annual Monitoring Event

Table 1Proposed List of Wells for Performance and Natural Attenuation Monitoring

WellIdentification

Designated Groundwater

Zone1

Analytical

Parameters2 Comment

S-2 S VOC Plume delineation

S-3 S VOC Distal monitoring



S-13 UI VOC Plume delineation

S-15I UI VOC Plume delineation


S-19 S VOC Core monitoring

T-6S S VOC, MNA Source area monitoring

T-11 UI VOC Plume delineation

T-14 S VOC Core monitoring

T-15 S VOC Plume delineation

T-34S S VOC Plume delineation

PZ-2S S VOC, MNA Source area monitoring

PZ-5S S VOC, MNA Source area monitoring; core monitoring

PZ-7S S VOC Plume delineation

PZI-1 UI VOC, MNA Source area monitoring

IW-1B S VOC, MNA MNA monitoring for former Spectra-Physics Property

IW-3C S VOC MNA monitoring for former Spectra-Physics Property

IW-3D S VOC, MNA Source area monitoring; MNA monitoring for former Spectra-Physics Property

IW-5B S VOC MNA monitoring for former Spectra-Physics Property

IW-6A S VOC MNA monitoring for former Spectra-Physics Property

IW-7B S VOC MNA monitoring for former Spectra-Physics Property

PMW-2S S VOC, MNA Source area monitoring; MNA monitoring for former Spectra-Physics Property

PMW-4S S VOC MNA monitoring for former Spectra-Physics Property

PMW-5S S VOC, MNA MNA monitoring for former Spectra-Physics Property

GMW-4S S VOC Supplemental MNA monitoring for former Spectra-Physics Property

MW-12UI UI VOC, MNA Source area monitoring

MW-14LI LI VOC, MNA Source area monitoring

MW-15LI LI VOC, MNA Source area monitoring

A-8S S VOC, MNA, ERD ERD performance monitoring, to be sampled by FTC&H

MW-17LI LI VOC, MNA, ERD ERD performance monitoring, to be sampled by FTC&H

MW-18UI UI VOC, MNA, ERD ERD performance monitoring, to be sampled by FTC&H

MW-19S S VOC, MNA, ERD ERD performance monitoring, to be sampled by FTC&H

MW-20LI LI VOC, MNA, ERD ERD performance monitoring, to be sampled by FTC&H

MW-23US S VOC, MNA, ERD ERD performance monitoring, to be sampled by FTC&H

NC-1S S VOC Plume delineation

NC-2I UI VOC Plume delineation

W-1 UI VOC Distal monitoring

W-2 S VOC Distal monitoring

W-2A UI VOC Plume delineation

W-3 S VOC Distal monitoring

W-4 S VOC Plume delineation


Teledyne Semiconductor / Spectra-Physics Wells

North Bayshore Area Wells

Table_1 dft_revised (2) Page 1 of 2

Table 1Proposed List of Wells for Performance and Natural Attenuation Monitoring

WellIdentification

Designated Groundwater

Zone1

Analytical

Parameters2 Comment

W-6 S VOC Plume delineation


Well 23 S VOC Distal monitoring

27I UI VOC Plume delineation; MNA monitoring downgradient of E-13

28S S VOC Plume delineation

GMW-1S S VOC Distal monitoring

GMW-1I UI VOC Core monitoring

GMW-3S S VOC Distal monitoring

NB-1I UI VOC Distal monitoring

NB-18I UI VOC Distal monitoring; MNA monitoring downgradient of E-13

NB-25 S VOC Plume delineation

NB-26I UI VOC Distal monitoring

E-1 S VOC Core monitoring


E-6 S VOC Distal monitoring

E-7 S VOC Distal monitoring


E-10 UI VOC Core monitoring


E-13 UI VOC Distal monitoring


E-15 UI VOC Plume delineation


E-19 UI VOC Distal monitoring

ES1S S VOC Distal monitoring

ES3I LI VOC Core monitoring

ES4I UI VOC Core monitoring

ES5S S VOC Core monitoring

PS3I UI VOC Distal monitoring

MS-1S S VOC Plume delineation

MS-2I UI VOC Plume delineation

MS-6I LI VOC Plume delineation

MS-9S S VOC Plume delineation

MS-10S S VOC Distal monitoring

Permanente Creek at Landfill not applicable VOC Surface water monitoring

Permanente Creek at Charleston not applicable VOC Surface water monitoring

Permanente Creek at Middlefield not applicable VOC Surface water monitoringNotes:

1 S = Shallow Zone; UI = Upper-Intermediate Zone; LI = Lower-Intermediate Zone

2 VOC = volatile organic compounds; MNA = additional monitored natural attenuation parameters; see Table 2

ERD = enhanced reductive dechlorination

FTC&H = Fishbeck, Thompson, Carr, and Huber, Inc.

MNA = monitored natural attenuation

SMP = Self-Monitoring Plan

Bold indicates wells that were added to the revised SMP list.

Italicized indicates wells to be sampled by FTC&H*.

* FTC&H will: 1) collect field measurements of dissolved oxygen, temperature, turbidity, specific conductivity, pH, and redox potential; and

2) send samples for laboratory analysis of chlorinated VOCs, total organic carbon, nitrate+nitrite, sulfate, and dissolved ethane,

ethene, and methane. The extra measurements and analytes are needed to assess the performance of remedial ERD activities, but are

also useful for characterizing MNA.

Spring Street Area Wells

Surface Water Samples

Table_1 dft_revised (2) Page 2 of 2

Table 2Summary of Proposed Analytical Methodsfor 2018 Annual Monitoring Event

Analyte Lab Test Method -Procedure

SampleContainer Data Use

dissolved oxygen (DO)field meter with DO probe or field test kit using the

Winkler titration techniqueNA

Oxygen is consumed to create an anaerobic environment. Concentrations less than 1 mg/l generally indicate anaerobic conditions. Reductive conditions are more favorable for natural attenuation.

pH, conductivity, temperature, and turbidity

field meter with appropriate probes

100 mlplastic

Monitors stabilization of parameters for sampling formation water.

oxidation-reduction potential (ORP)

field meter with ORP probe NA

Influenced by the nature of biological degradation of contaminants. Depressed ORP indicates a reductive environment.

Volatile Organic Compounds (VOCs) Analysis

VOCsEPA Method 8260 for 8010 list compounds (GC/MS)

40 ml VOA Primary analysis for assessing plume migration or changes.

Additional MNA Analyses

ethene and ethane Microseeps Method AM20Gax 40 ml VOA By-product of dehalogenation.

methane Microseeps Method AM20Gax 40 ml VOA By-product of anaerobic activity. Presence indicates

anaerobic/methanogenic environment.

Notes:EPA = United States Environmental Protection AgencyGC/MS = gas chromatograph/mass spectrometrymg/l = milligrams per literml = milliliterNA = not applicableVOA = volatile organic analysis

Field Testing Methods

Laboratory Analytical Methods

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arcadis u.s., inc. engineering geologist - california

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