Agenda packet, regular meeting — San Mateo City Council, May 18, 2026 (part 37 of 40)

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WG1542320 QUALITY CONTROL SUMMARY ONE LAB. NATIONWIDE.

Volatile Organic Compounds (MS) by Method TO-15 L1260802-01,02,03,04,05,06 Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD) (LCS) R3570123-1 09/13/20 08:27 • (LCSD) R3570123-2 09/13/20 09:11 Spike Amount LCS Result LCSD Result LCS Rec. LCSD Rec. Rec. Limits LCS Qualifier LCSD Qualifier RPD RPD Limits Analyte ppbv ppbv ppbv % % % % %
Ethylbenzene 3.75 4.09 4.13 109 110 70.0-130 0.973 25
m&p-Xylene 7.50 8.26 8.34 110 111 70.0-130 0.964 25
o-Xylene 3.75 4.01 4.02 107 107 70.0-130 0.249 25
Styrene 3.75 4.12 4.17 110 111 70.0-130 1.21 25
Bromoform 3.75 4.01 4.05 107 108 70.0-130 0.993 25
1,1,2,2-Tetrachloroethane 3.75 3.95 3.96 105 106 70.0-130 0.253 25 4-Ethyltoluene 3.75 4.15 4.15 111 111 70.0-130 0.000 25 1,3,5-Trimethylbenzene 3.75 4.14 4.20 110 112 70.0-130 1.44 25 1,2,4-Trimethylbenzene 3.75 4.19 4.21 112 112 70.0-130 0.476 25 1,3-Dichlorobenzene 3.75 4.10 4.11 109 110 70.0-130 0.244 25 1,4-Dichlorobenzene 3.75 4.20 4.23 112 113 70.0-130 0.712 25 Benzyl Chloride 3.75 4.16 4.18 111 111 70.0-152 0.480 25 1,2-Dichlorobenzene 3.75 4.03 4.07 107 109 70.0-130 0.988 25 1,2,4-Trichlorobenzene 3.75 4.02 4.05 107 108 70.0-160 0.743 25 Hexachloro-1,3-butadiene 3.75 3.97 3.99 106 106 70.0-151 0.503 25 Naphthalene 3.75 3.96 3.98 106 106 70.0-159 0.504 25
TPH (GC/MS) Low Fraction 203 249 241 123 119 70.0-130 3.27 25 Allyl Chloride 3.75 4.09 4.11 109 110 70.0-130 0.488 25 2-Chlorotoluene 3.75 4.11 4.12 110 110 70.0-130 0.243 25 Methyl Methacrylate 3.75 3.74 3.72 99.7 99.2 70.0-130 0.536 25 Tetrahydrofuran 3.75 3.93 3.92 105 105 70.0-137 0.255 25 2,2,4-Trimethylpentane 3.75 4.05 4.07 108 109 70.0-130 0.493 25 Vinyl Bromide 3.75 4.19 4.15 112 111 70.0-130 0.959 25
Isopropylbenzene 3.75 4.09 4.12 109 110 70.0-130 0.731 25 (S) 1,4-Bromofluorobenzene 101 100 60.0-140
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WG1543224 QUALITY CONTROL SUMMARY ONE LAB. NATIONWIDE.

Volatile Organic Compounds (MS) by Method TO-15 L1260802-01,02,03 Method Blank (MB)
(MB) R3570679-3 09/15/20 10:34
MB Result MB Qualifier MB MDL MB RDL
Analyte ppbv ppbv ppbv
2-Propanol U 0.264 1.25
Tetrachloroethylene U 0.0814 0.200
(S) 1,4-Bromofluorobenzene 101 60.0-140
Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD) (LCS) R3570679-1 09/15/20 09:06 • (LCSD) R3570679-2 09/15/20 09:51 Spike Amount LCS Result LCSD Result LCS Rec. LCSD Rec. Rec. Limits LCS Qualifier LCSD Qualifier RPD RPD Limits Analyte ppbv ppbv ppbv % % % % %
2-Propanol 3.75 4.49 4.47 120 119 70.0-139 0.446 25
Tetrachloroethylene 3.75 4.42 4.37 118 117 70.0-130 1.14 25 (S) 1,4-Bromofluorobenzene 101 101 60.0-140
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WG1544165 QUALITY CONTROL SUMMARY ONE LAB. NATIONWIDE.

Organic Compounds (GC) by Method ASTM 1946 L1260802-01,02,03,04,05,06 Method Blank (MB)
(MB) R3571497-3 09/17/20 09:46
MB Result MB Qualifier MB MDL MB RDL
Analyte % % %
Helium U 0.0259 0.100
Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD) (LCS) R3571497-1 09/17/20 09:31 • (LCSD) R3571497-2 09/17/20 09:36 Spike Amount LCS Result LCSD Result LCS Rec. LCSD Rec. Rec. Limits LCS Qualifier LCSD Qualifier RPD RPD Limits Analyte % % % % % % % %
Helium 2.50 2.16 2.18 86.4 87.2 70.0-130 0.922 25
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WG1541877 QUALITY CONTROL SUMMARY ONE LAB. NATIONWIDE.

Organic Compounds (GC) by Method D1946 L1260802-01,02,03,04,05,06 Method Blank (MB)
(MB) R3570254-3 09/14/20 13:27
MB Result MB Qualifier MB MDL MB RDL
Analyte % % %
Oxygen 0.676 0.225 5.00
Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD) (LCS) R3570254-1 09/14/20 13:13 • (LCSD) R3570254-2 09/14/20 13:21 Spike Amount LCS Result LCSD Result LCS Rec. LCSD Rec. Rec. Limits LCS Qualifier LCSD Qualifier RPD RPD Limits Analyte % % % % % % % %
Oxygen 20.0 22.3 21.2 112 106 70.0-130 5.06 20
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GLOSSARY OF TERMS ONE LAB. NATIONWIDE.

Guide to Reading and Understanding Your Laboratory Report The information below is designed to better explain the various terms used in your report of analytical results from the Laboratory. This is not intended as a comprehensive explanation, and if you have additional questions please contact your project representative.

Results Disclaimer - Information that may be provided by the customer, and contained within this report, include Permit Limits, Project Name, Sample ID, Sample Matrix, Sample Preservation, Field Blanks, Field Spikes, Field Duplicates, On-Site Data, Sampling Collection Dates/Times, and Sampling Location. Results relate to the accuracy of this information provided, and as the samples are received.

Abbreviations and Definitions
MDL Method Detection Limit.

ND Not detected at the Reporting Limit (or MDL where applicable).

RDL Reported Detection Limit.

Rec. Recovery.

RPD Relative Percent Difference.

SDG Sample Delivery Group.
(S)
Surrogate (Surrogate Standard) - Analytes added to every blank, sample, Laboratory Control Sample/Duplicate and Matrix Spike/Duplicate; used to evaluate analytical efficiency by measuring recovery. Surrogates are not expected to be detected in all environmental media.

U Not detected at the Reporting Limit (or MDL where applicable).

Analyte The name of the particular compound or analysis performed. Some Analyses and Methods will have multiple analytes reported.

Dilution
If the sample matrix contains an interfering material, the sample preparation volume or weight values differ from the standard, or if concentrations of analytes in the sample are higher than the highest limit of concentration that the laboratory can accurately report, the sample may be diluted for analysis. If a value different than 1 is used in this field, the result reported has already been corrected for this factor.

Limits
These are the target % recovery ranges or % difference value that the laboratory has historically determined as normal for the method and analyte being reported. Successful QC Sample analysis will target all analytes recovered or duplicated within these ranges.

Qualifier
This column provides a letter and/or number designation that corresponds to additional information concerning the result reported. If a Qualifier is present, a definition per Qualifier is provided within the Glossary and Definitions page and potentially a discussion of possible implications of the Qualifier in the Case Narrative if applicable.

Result
The actual analytical final result (corrected for any sample specific characteristics) reported for your sample. If there was no measurable result returned for a specific analyte, the result in this column may state “ND” (Not Detected) or “BDL” (Below Detectable Levels). The information in the results column should always be accompanied by either an MDL (Method Detection Limit) or RDL (Reporting Detection Limit) that defines the lowest value that the laboratory could detect or report for this analyte.

Uncertainty
(Radiochemistry) Confidence level of 2 sigma.

Case Narrative (Cn)
A brief discussion about the included sample results, including a discussion of any non-conformances to protocol observed either at sample receipt by the laboratory from the field or during the analytical process. If present, there will be a section in the Case Narrative to discuss the meaning of any data qualifiers used in the report.

Quality Control
Summary (Qc)
This section of the report includes the results of the laboratory quality control analyses required by procedure or analytical methods to assist in evaluating the validity of the results reported for your samples. These analyses are not being performed on your samples typically, but on laboratory generated material.

Sample Chain of
Custody (Sc)
This is the document created in the field when your samples were initially collected. This is used to verify the time and date of collection, the person collecting the samples, and the analyses that the laboratory is requested to perform. This chain of custody also documents all persons (excluding commercial shippers) that have had control or possession of the samples from the time of collection until delivery to the laboratory for analysis.

Sample Results (Sr)
This section of your report will provide the results of all testing performed on your samples. These results are provided by sample ID and are separated by the analyses performed on each sample. The header line of each analysis section for each sample will provide the name and method number for the analysis reported.

Sample Summary (Ss) This section of the Analytical Report defines the specific analyses performed for each sample ID, including the dates and times of preparation and/or analysis.

Qualifier Description
B The same analyte is found in the associated blank.

E
The analyte concentration exceeds the upper limit of the calibration range of the instrument established by the initial calibration (ICAL).

J The identification of the analyte is acceptable; the reported value is an estimate.

J1 Surrogate recovery limits have been exceeded; values are outside upper control limits. 1 Cp
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ONE LAB. NATIONWIDE.

Pace National is the only environmental laboratory accredited/certified to support your work nationwide from one location. One phone call, one point of contact, one laboratory. No other lab is as accessible or prepared to handle your needs throughout the country. Our capacity and capability from our single location laboratory is comparable to the collective totals of the network laboratories in our industry. The most significant benefit to our one location design is the design of our laboratory campus. The model is conducive to accelerated productivity, decreasing turn-around time, and preventing cross contamination, thus protecting sample integrity. Our focus on premium quality and prompt service allows us to be YOUR LAB OF CHOICE. * Not all certifications held by the laboratory are applicable to the results reported in the attached report. * Accreditation is only applicable to the test methods specified on each scope of accreditation held by Pace National.

State Accreditations
Alabama 40660 Nebraska NE-OS-15-05
Alaska 17-026 Nevada TN-03-2002-34
Arizona AZ0612 New Hampshire 2975
Arkansas 88-0469 New Jersey–NELAP TN002
California 2932 New Mexico ¹ n/a
Colorado TN00003 New York 11742
Connecticut PH-0197 North Carolina Env375
Florida E87487 North Carolina ¹ DW21704
Georgia NELAP North Carolina ³ 41
Georgia ¹ 923 North Dakota R-140
Idaho TN00003 Ohio–VAP CL0069
Illinois 200008 Oklahoma 9915
Indiana C-TN-01 Oregon TN200002
Iowa 364 Pennsylvania 68-02979
Kansas E-10277 Rhode Island LAO00356
Kentucky ¹ ⁶ 90010 South Carolina 84004
Kentucky ² 16 South Dakota n/a
Louisiana AI30792 Tennessee ¹ ⁴ 2006
Louisiana ¹ LA180010 Texas T104704245-18-15
Maine TN0002 Texas ⁵ LAB0152
Maryland 324 Utah TN00003
Massachusetts M-TN003 Vermont VT2006
Michigan 9958 Virginia 460132
Minnesota 047-999-395 Washington C847
Mississippi TN00003 West Virginia 233
Missouri 340 Wisconsin 9980939910
Montana CERT0086 Wyoming A2LA
Third Party Federal Accreditations
A2LA – ISO 17025 1461.01 AIHA-LAP,LLC EMLAP 100789
A2LA – ISO 17025 ⁵ 1461.02 DOD 1461.01
Canada 1461.01 USDA P330-15-00234
EPA–Crypto TN00003

ACCREDITATIONS & LOCATIONS
¹ Drinking Water ² Underground Storage Tanks ³ Aquatic Toxicity ⁴ Chemical/Microbiological ⁵ Mold ⁶ Wastewater n/a Accreditation not applicable Our Locations
Pace National has sixty-four client support centers that provide sample pickup and/or the delivery of sampling supplies. If you would like assistance from one of our support offices, please contact our main office. Pace National performs all testing at our central laboratory. 1 Cp
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ANALYTICAL REPORT
September 28, 2020
RMD Environmental - Walnut Creek, CA
Sample Delivery Group: L1264337
Samples Received: 09/09/2020
Project Number: 01-PRO-003
Description: Talbots
Report To: Doug Whichard
1371 Oakland Blvd.

Suite 200
Walnut Creek, CA 94596
Entire Report Reviewed By:

September 28, 2020
[Preliminary Report]
Jared Starkey
Project Manager
Results relate only to the items tested or calibrated and are reported as rounded values. This test report shall not be reproduced, except in full, without written approval of the laboratory. Where applicable, sampling conducted by Pace Analytical National is performed per guidance provided in laboratory standard operating procedures ENV-SOP-MTJL-0067 and ENV-SOP-MTJL-0068. Where sampling conducted by the customer, results relate to the accuracy of the information provided, and as the samples are received.
12065 Lebanon Rd Mount Juliet, TN 37122 615-758-5858 800-767-5859 www.pacenational.com 1 Cp
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Jared Starkey
Project Manager
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TABLE OF CONTENTS ONE LAB. NATIONWIDE.

Cp: Cover Page 1
Tc: Table of Contents 2
Ss: Sample Summary 3
Cn: Case Narrative 5
Ds: Detection Summary 6
Sr: Sample Results 7
SVP-04-1 L1264337-01 7
SVP-04-3 L1264337-02 8
SVP-04-5 L1264337-03 9
SVP-04-7 L1264337-04 10
SVP-05-1 L1264337-05 11
SVP-05-3 L1264337-06 12
SVP-05-5 L1264337-07 13
SVP-05-7 L1264337-08 14
SB-04-COMP L1264337-09 15
SVP-04-COMP L1264337-10 16
SVP-05-COMP L1264337-11 17
SVP-06-COMP L1264337-12 18
SVP-06-COMP L1264337-13 19
SVP-07-COMP L1264337-14 20
Qc: Quality Control Summary 21
Total Solids by Method 2540 G-2011 21
Metals (ICP) by Method 6010B 22
Gl: Glossary of Terms 25
Al: Accreditations & Locations 26
Sc: Sample Chain of Custody 27
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SAMPLE SUMMARY ONE LAB. NATIONWIDE.

Collected by Collected date/time Received date/time
SVP-04-1 L1264337-01 Solid B Angulo 09/08/20 09:00 09/09/20 09:30 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time
Total Solids by Method 2540 G-2011 WG1548490 1 09/26/20 23:06 09/26/20 23:23 KDW Mt. Juliet, TN Metals (ICP) by Method 6010B WG1547313 1 09/22/20 17:19 09/23/20 16:17 CCE Mt. Juliet, TN Collected by Collected date/time Received date/time
SVP-04-3 L1264337-02 Solid B Angulo 09/08/20 09:30 09/09/20 09:30 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time
Total Solids by Method 2540 G-2011 WG1548490 1 09/26/20 23:06 09/26/20 23:23 KDW Mt. Juliet, TN Metals (ICP) by Method 6010B WG1547313 1 09/22/20 17:19 09/23/20 16:20 CCE Mt. Juliet, TN Collected by Collected date/time Received date/time
SVP-04-5 L1264337-03 Solid B Angulo 09/08/20 09:38 09/09/20 09:30 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time
Total Solids by Method 2540 G-2011 WG1548490 1 09/26/20 23:06 09/26/20 23:23 KDW Mt. Juliet, TN Metals (ICP) by Method 6010B WG1547313 1 09/22/20 17:19 09/23/20 16:22 CCE Mt. Juliet, TN Collected by Collected date/time Received date/time
SVP-04-7 L1264337-04 Solid B Angulo 09/08/20 09:55 09/09/20 09:30 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time
Total Solids by Method 2540 G-2011 WG1548490 1 09/26/20 23:06 09/26/20 23:23 KDW Mt. Juliet, TN Metals (ICP) by Method 6010B WG1547313 1 09/22/20 17:19 09/23/20 16:25 CCE Mt. Juliet, TN Collected by Collected date/time Received date/time
SVP-05-1 L1264337-05 Solid B Angulo 09/08/20 10:22 09/09/20 09:30 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time
Total Solids by Method 2540 G-2011 WG1548490 1 09/26/20 23:06 09/26/20 23:23 KDW Mt. Juliet, TN Metals (ICP) by Method 6010B WG1547313 1 09/22/20 17:19 09/23/20 15:34 CCE Mt. Juliet, TN Collected by Collected date/time Received date/time
SVP-05-3 L1264337-06 Solid B Angulo 09/08/20 10:30 09/09/20 09:30 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time
Total Solids by Method 2540 G-2011 WG1548490 1 09/26/20 23:06 09/26/20 23:23 KDW Mt. Juliet, TN Metals (ICP) by Method 6010B WG1547313 1 09/22/20 17:19 09/23/20 16:33 CCE Mt. Juliet, TN Collected by Collected date/time Received date/time
SVP-05-5 L1264337-07 Solid B Angulo 09/08/20 10:40 09/09/20 09:30 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time
Total Solids by Method 2540 G-2011 WG1548490 1 09/26/20 23:06 09/26/20 23:23 KDW Mt. Juliet, TN Metals (ICP) by Method 6010B WG1547313 1 09/22/20 17:19 09/23/20 16:36 CCE Mt. Juliet, TN 1 Cp
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SAMPLE SUMMARY ONE LAB. NATIONWIDE.

Collected by Collected date/time Received date/time
SVP-05-7 L1264337-08 Solid B Angulo 09/08/20 00:00 09/09/20 09:30 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time
Total Solids by Method 2540 G-2011 WG1548490 1 09/26/20 23:06 09/26/20 23:23 KDW Mt. Juliet, TN Metals (ICP) by Method 6010B WG1547313 1 09/22/20 17:19 09/23/20 16:39 CCE Mt. Juliet, TN Collected by Collected date/time Received date/time
SB-04-COMP L1264337-09 GW B Angulo 09/08/20 00:00 09/09/20 09:30 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time
Preparation by Method 22CCRA2 WG1546473 1 09/21/20 08:34 09/21/20 08:34 JGB Metals (ICP) by Method 6010B WG1547881 9 09/23/20 12:36 09/24/20 10:00 CCE Mt. Juliet, TN Collected by Collected date/time Received date/time
SVP-04-COMP L1264337-10 GW B Angulo 09/08/20 00:00 09/09/20 09:30 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time
Preparation by Method 22CCRA2 WG1546473 1 09/21/20 08:34 09/21/20 08:34 JGB Metals (ICP) by Method 6010B WG1547881 9 09/23/20 12:36 09/24/20 09:39 CCE Mt. Juliet, TN Collected by Collected date/time Received date/time
SVP-05-COMP L1264337-11 GW B Angulo 09/08/20 00:00 09/09/20 09:30 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time
Preparation by Method 22CCRA2 WG1546473 1 09/21/20 08:34 09/21/20 08:34 JGB Metals (ICP) by Method 6010B WG1547881 9 09/23/20 12:36 09/24/20 09:41 CCE Mt. Juliet, TN Collected by Collected date/time Received date/time
SVP-06-COMP L1264337-12 Waste B Angulo 09/08/20 00:00 09/09/20 09:30 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time
Preparation by Method 1311 WG1547341 1 09/23/20 07:38 09/23/20 07:38 APH Mt. Juliet, TN Metals (ICP) by Method 6010B WG1548413 1 09/24/20 16:35 09/25/20 07:39 TRB Mt. Juliet, TN Collected by Collected date/time Received date/time
SVP-06-COMP L1264337-13 GW B Angulo 09/08/20 00:00 09/09/20 09:30 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time
Preparation by Method 22CCRA2 WG1546473 1 09/21/20 08:34 09/21/20 08:34 JGB Metals (ICP) by Method 6010B WG1547881 9 09/23/20 12:36 09/24/20 09:44 CCE Mt. Juliet, TN Collected by Collected date/time Received date/time
SVP-07-COMP L1264337-14 GW B Angulo 09/08/20 00:00 09/09/20 09:30 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time
Preparation by Method 22CCRA2 WG1546473 1 09/21/20 08:34 09/21/20 08:34 JGB Metals (ICP) by Method 6010B WG1547881 9 09/23/20 12:36 09/24/20 09:47 CCE Mt. Juliet, TN 1 Cp
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CASE NARRATIVE ONE LAB. NATIONWIDE.

All sample aliquots were received at the correct temperature, in the proper containers, with the appropriate preservatives, and within method specified holding times, unless qualified or notated within the report. Where applicable, all MDL (LOD) and RDL (LOQ) values reported for environmental samples have been corrected for the dilution factor used in the analysis. All Method and Batch Quality Control are within established criteria except where addressed in this case narrative, a non-conformance form or properly qualified within the sample results. By my digital signature below, I affirm to the best of my knowledge, all problems/anomalies observed by the laboratory as having the potential to affect the quality of the data have been identified by the laboratory, and no information or data have been knowingly withheld that would affect the quality of the data. [Preliminary Report]
Jared Starkey
Project Manager
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Project Manager
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DETECTION SUMMARY ONE LAB. NATIONWIDE.

Metals (ICP) by Method 6010B
Result Qualifier MDL RDL Dilution Analysis Batch
Client ID Lab Sample ID Analyte ug/l ug/l ug/l date / time SB-04-COMP L1264337-09 Chromium 186 45.0 90.0 9 09/24/2020 10:00 WG1547881 SVP-04-COMP L1264337-10 Chromium 596 45.0 90.0 9 09/24/2020 09:39 WG1547881 SVP-04-COMP L1264337-10 Lead 628 26.6 54.0 9 09/24/2020 09:39 WG1547881 SVP-05-COMP L1264337-11 Chromium 958 45.0 90.0 9 09/24/2020 09:41 WG1547881 SVP-05-COMP L1264337-11 Lead 3450 26.6 54.0 9 09/24/2020 09:41 WG1547881 SVP-06-COMP L1264337-13 Chromium 281 45.0 90.0 9 09/24/2020 09:44 WG1547881 SVP-07-COMP L1264337-14 Chromium 170 45.0 90.0 9 09/24/2020 09:47 WG1547881 Metals (ICP) by Method 6010B
Result (dry) Qualifier MDL (dry) RDL (dry) Dilutio
n
Analysis Batch
Client ID Lab Sample ID Analyte mg/kg mg/kg mg/kg date / time SVP-04-1 L1264337-01 Lead 4.67 0.269 0.647 1 09/23/2020 16:17 WG1547313 SVP-04-3 L1264337-02 Lead 145 0.237 0.570 1 09/23/2020 16:20 WG1547313 SVP-04-5 L1264337-03 Lead 19.6 0.238 0.572 1 09/23/2020 16:22 WG1547313 SVP-04-7 L1264337-04 Lead 42.7 0.232 0.557 1 09/23/2020 16:25 WG1547313 SVP-05-1 L1264337-05 Lead 20.8 O1 0.255 0.613 1 09/23/2020 15:34 WG1547313 SVP-05-3 L1264337-06 Lead 607 0.234 0.563 1 09/23/2020 16:33 WG1547313 SVP-05-5 L1264337-07 Lead 17.9 0.241 0.579 1 09/23/2020 16:36 WG1547313 SVP-05-7 L1264337-08 Lead 19.7 0.232 0.558 1 09/23/2020 16:39 WG1547313 1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:

RMD Environmental - Walnut Creek, CA 01-PRO-003 L1264337 09/28/20 10:06 6 of 30 ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:

RMD Environmental - Walnut Creek, CA 01-PRO-003 L1264337 09/28/20 13:16 6 of 30 DRAFT
10439 of 11211
SAMPLE RESULTS - 01 ONE LAB. NATIONWIDE.

L1264337
SVP-04-1
Collected date/time: 09/08/20 09:00
Total Solids by Method 2540 G-2011
Result Qualifier Dilution Analysis Batch
Analyte % date / time
Total Solids 77.3 1 09/26/2020 23:23 WG1548490
Metals (ICP) by Method 6010B
Result (dry) Qualifier MDL (dry) RDL (dry) Dilution Analysis Batch Analyte mg/kg mg/kg mg/kg date / time
Lead 4.67 0.269 0.647 1 09/23/2020 16:17 WG1547313
1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:

RMD Environmental - Walnut Creek, CA 01-PRO-003 L1264337 09/28/20 10:06 7 of 30 ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:

RMD Environmental - Walnut Creek, CA 01-PRO-003 L1264337 09/28/20 13:16 7 of 30 DRAFT
10440 of 11211
SAMPLE RESULTS - 02 ONE LAB. NATIONWIDE.

L1264337
SVP-04-3
Collected date/time: 09/08/20 09:30
Total Solids by Method 2540 G-2011
Result Qualifier Dilution Analysis Batch
Analyte % date / time
Total Solids 87.8 1 09/26/2020 23:23 WG1548490
Metals (ICP) by Method 6010B
Result (dry) Qualifier MDL (dry) RDL (dry) Dilution Analysis Batch Analyte mg/kg mg/kg mg/kg date / time
Lead 145 0.237 0.570 1 09/23/2020 16:20 WG1547313
1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:

RMD Environmental - Walnut Creek, CA 01-PRO-003 L1264337 09/28/20 10:06 8 of 30 ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:

RMD Environmental - Walnut Creek, CA 01-PRO-003 L1264337 09/28/20 13:16 8 of 30 DRAFT
10441 of 11211
SAMPLE RESULTS - 03 ONE LAB. NATIONWIDE.

L1264337
SVP-04-5
Collected date/time: 09/08/20 09:38
Total Solids by Method 2540 G-2011
Result Qualifier Dilution Analysis Batch
Analyte % date / time
Total Solids 87.4 1 09/26/2020 23:23 WG1548490
Metals (ICP) by Method 6010B
Result (dry) Qualifier MDL (dry) RDL (dry) Dilution Analysis Batch Analyte mg/kg mg/kg mg/kg date / time
Lead 19.6 0.238 0.572 1 09/23/2020 16:22 WG1547313
1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:

RMD Environmental - Walnut Creek, CA 01-PRO-003 L1264337 09/28/20 10:06 9 of 30 ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:

RMD Environmental - Walnut Creek, CA 01-PRO-003 L1264337 09/28/20 13:16 9 of 30 DRAFT
10442 of 11211
SAMPLE RESULTS - 04 ONE LAB. NATIONWIDE.

L1264337
SVP-04-7
Collected date/time: 09/08/20 09:55
Total Solids by Method 2540 G-2011
Result Qualifier Dilution Analysis Batch
Analyte % date / time
Total Solids 89.8 1 09/26/2020 23:23 WG1548490
Metals (ICP) by Method 6010B
Result (dry) Qualifier MDL (dry) RDL (dry) Dilution Analysis Batch Analyte mg/kg mg/kg mg/kg date / time
Lead 42.7 0.232 0.557 1 09/23/2020 16:25 WG1547313
1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:

RMD Environmental - Walnut Creek, CA 01-PRO-003 L1264337 09/28/20 10:06 10 of 30 ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:

RMD Environmental - Walnut Creek, CA 01-PRO-003 L1264337 09/28/20 13:16 10 of 30 DRAFT
10443 of 11211
SAMPLE RESULTS - 05 ONE LAB. NATIONWIDE.

L1264337
SVP-05-1
Collected date/time: 09/08/20 10:22
Total Solids by Method 2540 G-2011
Result Qualifier Dilution Analysis Batch
Analyte % date / time
Total Solids 81.6 1 09/26/2020 23:23 WG1548490
Metals (ICP) by Method 6010B
Result (dry) Qualifier MDL (dry) RDL (dry) Dilution Analysis Batch Analyte mg/kg mg/kg mg/kg date / time
Lead 20.8 O1 0.255 0.613 1 09/23/2020 15:34 WG1547313
1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:

RMD Environmental - Walnut Creek, CA 01-PRO-003 L1264337 09/28/20 10:06 11 of 30 ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:

RMD Environmental - Walnut Creek, CA 01-PRO-003 L1264337 09/28/20 13:16 11 of 30 DRAFT
10444 of 11211
SAMPLE RESULTS - 06 ONE LAB. NATIONWIDE.

L1264337
SVP-05-3
Collected date/time: 09/08/20 10:30
Total Solids by Method 2540 G-2011
Result Qualifier Dilution Analysis Batch
Analyte % date / time
Total Solids 88.8 1 09/26/2020 23:23 WG1548490
Metals (ICP) by Method 6010B
Result (dry) Qualifier MDL (dry) RDL (dry) Dilution Analysis Batch Analyte mg/kg mg/kg mg/kg date / time
Lead 607 0.234 0.563 1 09/23/2020 16:33 WG1547313
1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:

RMD Environmental - Walnut Creek, CA 01-PRO-003 L1264337 09/28/20 10:06 12 of 30 ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:

RMD Environmental - Walnut Creek, CA 01-PRO-003 L1264337 09/28/20 13:16 12 of 30 DRAFT
10445 of 11211
SAMPLE RESULTS - 07 ONE LAB. NATIONWIDE.

L1264337
SVP-05-5
Collected date/time: 09/08/20 10:40
Total Solids by Method 2540 G-2011
Result Qualifier Dilution Analysis Batch
Analyte % date / time
Total Solids 86.4 1 09/26/2020 23:23 WG1548490
Metals (ICP) by Method 6010B
Result (dry) Qualifier MDL (dry) RDL (dry) Dilution Analysis Batch Analyte mg/kg mg/kg mg/kg date / time
Lead 17.9 0.241 0.579 1 09/23/2020 16:36 WG1547313
1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:

RMD Environmental - Walnut Creek, CA 01-PRO-003 L1264337 09/28/20 10:06 13 of 30 ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:

RMD Environmental - Walnut Creek, CA 01-PRO-003 L1264337 09/28/20 13:16 13 of 30 DRAFT
10446 of 11211
SAMPLE RESULTS - 08 ONE LAB. NATIONWIDE.

L1264337
SVP-05-7
Collected date/time: 09/08/20 00:00
Total Solids by Method 2540 G-2011
Result Qualifier Dilution Analysis Batch
Analyte % date / time
Total Solids 89.6 1 09/26/2020 23:23 WG1548490
Metals (ICP) by Method 6010B
Result (dry) Qualifier MDL (dry) RDL (dry) Dilution Analysis Batch Analyte mg/kg mg/kg mg/kg date / time
Lead 19.7 0.232 0.558 1 09/23/2020 16:39 WG1547313
1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:

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RMD Environmental - Walnut Creek, CA 01-PRO-003 L1264337 09/28/20 13:16 14 of 30 DRAFT
10447 of 11211
SAMPLE RESULTS - 09 ONE LAB. NATIONWIDE.

L1264337
SB-04-COMP
Collected date/time: 09/08/20 00:00
Preparation by Method 1311/22CCRA2
Result Qualifier Prep Batch
Analyte date / time
STLC Extraction - 9/21/2020 8:34:25 AM WG1546473
Final pH 5.12 9/21/2020 8:34:25 AM WG1546473
Metals (ICP) by Method 6010B
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte ug/l ug/l ug/l date / time
Chromium 186 45.0 90.0 9 09/24/2020 10:00 WG1547881
1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:

RMD Environmental - Walnut Creek, CA 01-PRO-003 L1264337 09/28/20 10:06 15 of 30 ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:

RMD Environmental - Walnut Creek, CA 01-PRO-003 L1264337 09/28/20 13:16 15 of 30 DRAFT
10448 of 11211
SAMPLE RESULTS - 10 ONE LAB. NATIONWIDE.

L1264337
SVP-04-COMP
Collected date/time: 09/08/20 00:00
Preparation by Method 1311/22CCRA2
Result Qualifier Prep Batch
Analyte date / time
STLC Extraction - 9/21/2020 8:34:25 AM WG1546473
Final pH 5.34 9/21/2020 8:34:25 AM WG1546473
Metals (ICP) by Method 6010B
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte ug/l ug/l ug/l date / time
Chromium 596 45.0 90.0 9 09/24/2020 09:39 WG1547881
Lead 628 26.6 54.0 9 09/24/2020 09:39 WG1547881
1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:

RMD Environmental - Walnut Creek, CA 01-PRO-003 L1264337 09/28/20 10:06 16 of 30 ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:

RMD Environmental - Walnut Creek, CA 01-PRO-003 L1264337 09/28/20 13:16 16 of 30 DRAFT
10449 of 11211
SAMPLE RESULTS - 11 ONE LAB. NATIONWIDE.

L1264337
SVP-05-COMP
Collected date/time: 09/08/20 00:00
Preparation by Method 1311/22CCRA2
Result Qualifier Prep Batch
Analyte date / time
STLC Extraction - 9/21/2020 8:34:25 AM WG1546473
Final pH 5.58 9/21/2020 8:34:25 AM WG1546473
Metals (ICP) by Method 6010B
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte ug/l ug/l ug/l date / time
Chromium 958 45.0 90.0 9 09/24/2020 09:41 WG1547881
Lead 3450 26.6 54.0 9 09/24/2020 09:41 WG1547881
1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:

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RMD Environmental - Walnut Creek, CA 01-PRO-003 L1264337 09/28/20 13:16 17 of 30 DRAFT
10450 of 11211
SAMPLE RESULTS - 12 ONE LAB. NATIONWIDE.

L1264337
SVP-06-COMP
Collected date/time: 09/08/20 00:00
Preparation by Method 1311/22CCRA2
Result Qualifier Prep Batch
Analyte date / time
TCLP Extraction - 9/23/2020 7:38:44 AM WG1547341
Fluid 1 9/23/2020 7:38:44 AM WG1547341
Initial pH 6.81 9/23/2020 7:38:44 AM WG1547341
Final pH 4.97 9/23/2020 7:38:44 AM WG1547341
Metals (ICP) by Method 6010B
Result Qualifier RDL Limit Dilution Analysis Batch
Analyte mg/l mg/l mg/l date / time
Chromium ND 0.100 5 1 09/25/2020 07:39 WG1548413
1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:

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RMD Environmental - Walnut Creek, CA 01-PRO-003 L1264337 09/28/20 13:16 18 of 30 DRAFT
10451 of 11211
SAMPLE RESULTS - 13 ONE LAB. NATIONWIDE.

L1264337
SVP-06-COMP
Collected date/time: 09/08/20 00:00
Preparation by Method 1311/22CCRA2
Result Qualifier Prep Batch
Analyte date / time
STLC Extraction - 9/21/2020 8:34:25 AM WG1546473
Final pH 5.15 9/21/2020 8:34:25 AM WG1546473
Metals (ICP) by Method 6010B
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte ug/l ug/l ug/l date / time
Chromium 281 45.0 90.0 9 09/24/2020 09:44 WG1547881
1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:

RMD Environmental - Walnut Creek, CA 01-PRO-003 L1264337 09/28/20 10:06 19 of 30 ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:

RMD Environmental - Walnut Creek, CA 01-PRO-003 L1264337 09/28/20 13:16 19 of 30 DRAFT
10452 of 11211
SAMPLE RESULTS - 14 ONE LAB. NATIONWIDE.

L1264337
SVP-07-COMP
Collected date/time: 09/08/20 00:00
Preparation by Method 1311/22CCRA2
Result Qualifier Prep Batch
Analyte date / time
STLC Extraction - 9/21/2020 8:34:25 AM WG1546473
Final pH 5.18 9/21/2020 8:34:25 AM WG1546473
Metals (ICP) by Method 6010B
Result Qualifier MDL RDL Dilution Analysis Batch
Analyte ug/l ug/l ug/l date / time
Chromium 170 45.0 90.0 9 09/24/2020 09:47 WG1547881
1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:

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RMD Environmental - Walnut Creek, CA 01-PRO-003 L1264337 09/28/20 13:16 20 of 30 DRAFT
10453 of 11211
WG1548490 QUALITY CONTROL SUMMARY ONE LAB. NATIONWIDE.

Total Solids by Method 2540 G-2011 L1264337-01,02,03,04,05,06,07,08 Method Blank (MB)
(MB) R3575021-1 09/26/20 23:23
MB Result MB Qualifier MB MDL MB RDL
Analyte % % %
Total Solids 0.00100
L1264337-01 Original Sample (OS) • Duplicate (DUP)
(OS) L1264337-01 09/26/20 23:23 • (DUP) R3575021-3 09/26/20 23:23 Original Result DUP Result Dilution DUP RPD DUP Qualifier DUP RPD Limits
Analyte % % % %
Total Solids 77.3 77.3 1 0.0988 10
Laboratory Control Sample (LCS)
(LCS) R3575021-2 09/26/20 23:23
Spike Amount LCS Result LCS Rec. Rec. Limits LCS Qualifier Analyte % % % %
Total Solids 50.0 49.9 99.9 85.0-115
1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:

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10454 of 11211
WG1547313 QUALITY CONTROL SUMMARY ONE LAB. NATIONWIDE.

Metals (ICP) by Method 6010B L1264337-01,02,03,04,05,06,07,08 Method Blank (MB)
(MB) R3573821-1 09/23/20 15:29
MB Result MB Qualifier MB MDL MB RDL
Analyte mg/kg mg/kg mg/kg
Lead U 0.208 0.500
Laboratory Control Sample (LCS)
(LCS) R3573821-2 09/23/20 15:31
Spike Amount LCS Result LCS Rec. Rec. Limits LCS Qualifier Analyte mg/kg mg/kg % %
Lead 100 97.8 97.8 80.0-120
L1264337-05 Original Sample (OS) • Matrix Spike (MS) • Matrix Spike Duplicate (MSD) (OS) L1264337-05 09/23/20 15:34 • (MS) R3573821-5 09/23/20 15:42 • (MSD) R3573821-6 09/23/20 15:45 Spike Amount
(dry)
Original Result
(dry) MS Result (dry) MSD Result (dry) MS Rec. MSD Rec. Dilution Rec. Limits MS Qualifier MSD Qualifier RPD RPD Limits Analyte mg/kg mg/kg mg/kg mg/kg % % % % %
Lead 123 20.8 132 127 90.9 86.5 1 75.0-125 4.15 20
1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:

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10455 of 11211
WG1547881 QUALITY CONTROL SUMMARY ONE LAB. NATIONWIDE.

Metals (ICP) by Method 6010B L1264337-09,10,11,13,14
Method Blank (MB)
(MB) R3573999-1 09/24/20 09:55
MB Result MB Qualifier MB MDL MB RDL
Analyte ug/l ug/l ug/l
Chromium U 45.0 90.0
Lead U 26.6 54.0
Laboratory Control Sample (LCS)
(LCS) R3573999-2 09/24/20 09:58
Spike Amount LCS Result LCS Rec. Rec. Limits LCS Qualifier Analyte ug/l ug/l % %
Chromium 1000 1100 110 80.0-120
Lead 1000 1090 109 80.0-120
L1264337-09 Original Sample (OS) • Matrix Spike (MS) • Matrix Spike Duplicate (MSD) (OS) L1264337-09 09/24/20 10:00 • (MS) R3573999-4 09/24/20 10:06 • (MSD) R3573999-5 09/24/20 10:08 Spike Amount Original Result MS Result MSD Result MS Rec. MSD Rec. Dilution Rec. Limits MS Qualifier MSD Qualifier RPD RPD Limits Analyte ug/l ug/l ug/l ug/l % % % % %
Chromium 1000 186 10300 10200 112 111 9 75.0-125 0.968 20 Lead 1000 69.9 10200 10100 113 111 9 75.0-125 1.25 20
1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:

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RMD Environmental - Walnut Creek, CA 01-PRO-003 L1264337 09/28/20 13:16 23 of 30 DRAFT
10456 of 11211
WG1548413 QUALITY CONTROL SUMMARY ONE LAB. NATIONWIDE.

Metals (ICP) by Method 6010B L1264337-12
Method Blank (MB)
(MB) R3574486-1 09/25/20 07:02
MB Result MB Qualifier MB MDL MB RDL
Analyte mg/l mg/l mg/l
Chromium U 0.0330 0.100
Laboratory Control Sample (LCS)
(LCS) R3574486-2 09/25/20 07:04
Spike Amount LCS Result LCS Rec. Rec. Limits LCS Qualifier Analyte mg/l mg/l % %
Chromium 10.0 9.87 98.7 80.0-120
L1265193-02 Original Sample (OS) • Matrix Spike (MS) • Matrix Spike Duplicate (MSD) (OS) L1265193-02 09/25/20 07:07 • (MS) R3574486-4 09/25/20 07:13 • (MSD) R3574486-5 09/25/20 07:16 Spike Amount Original Result MS Result MSD Result MS Rec. MSD Rec. Dilution Rec. Limits MS Qualifier MSD Qualifier RPD RPD Limits Analyte mg/l mg/l mg/l mg/l % % % % %
Chromium 10.0 ND 9.74 9.74 97.4 97.4 1 75.0-125 0.0116 20 1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:

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10457 of 11211
GLOSSARY OF TERMS ONE LAB. NATIONWIDE.

Abbreviations and Definitions
(dry) Results are reported based on the dry weight of the sample. [this will only be present on a dry report basis for soils].

MDL Method Detection Limit.

MDL (dry) Method Detection Limit.

ND Not detected at the Reporting Limit (or MDL where applicable).

RDL Reported Detection Limit.

RDL (dry) Reported Detection Limit.

Rec. Recovery.

RPD Relative Percent Difference.

SDG Sample Delivery Group.

U Not detected at the Reporting Limit (or MDL where applicable).

Analyte The name of the particular compound or analysis performed. Some Analyses and Methods will have multiple analytes reported.

Original Sample The non-spiked sample in the prep batch used to determine the Relative Percent Difference (RPD) from a quality control sample. The Original Sample may not be included within the reported SDG.

Uncertainty
(Radiochemistry) Confidence level of 2 sigma.

Sample Summary (Ss) This section of the Analytical Report defines the specific analyses performed for each sample ID, including the dates and times of preparation and/or analysis.

Qualifier Description
O1 The analyte failed the method required serial dilution test and/or subsequent post-spike criteria. These failures indicate matrix interference.
1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:

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ONE LAB. NATIONWIDE.

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DRAFT
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DRAFT
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DRAFT
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DRAFT
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APPENDIX F

HISTORICAL RESOURCES
10464 of 11211
The EDR Aerial Photo Decade Package
401 - 445 S B Street 401 S B Street San Mateo, CA 94401 Inquiry Number: March 23, 2023 7287695.8 6 Armstrong Road, 4th floor
Shelton, CT 06484
Toll Free: 800.352.0050
www.edrnet.com 10465 of 11211
2020 1"=500' Flight Year: 2020 USDA/NAIP
2016 1"=500' Flight Year: 2016 USDA/NAIP
2012 1"=500' Flight Year: 2012 USDA/NAIP
2009 1"=500' Flight Year: 2009 USDA/NAIP
2005 1"=500' Flight Year: 2005 USDA/NAIP
1998 1"=500' Flight Date: August 29, 1998 USDA
1993 1"=500' Acquisition Date: July 10, 1993 USGS/DOQQ
1982 1"=500' Flight Date: July 08, 1982 USDA
1974 1"=500' Flight Date: June 26, 1974 USGS
1968 1"=500' Flight Date: June 14, 1968 USGS
1963 1"=500' Flight Date: June 24, 1963 EDR Proprietary Aerial Viewpoint 1956 1"=500' Flight Date: September 08, 1956 USGS
1946 1"=500' Flight Date: July 29, 1946 USGS
1943 1"=500' Flight Date: October 11, 1943 USDA
EDR Aerial Photo Decade Package 03/23/23 401 - 445 S B Street Site Name: Client Name: Langan 401 S B Street 135 Main Street Suite 1500 San Mateo, CA 94401 SAn Francisco, CA 94105 EDR Inquiry # 7287695.8 Contact: Dulce Rodriguez Rivera Environmental Data Resources, Inc. (EDR) Aerial Photo Decade Package is a screening tool designed to assist environmental professionals in evaluating potential liability on a target property resulting from past activities. EDR’s professional researchers provide digitally reproduced historical aerial photographs, and when available, provide one photo per decade. Search Results: Year Scale Details Source
When delivered electronically by EDR, the aerial photo images included with this report are for ONE TIME USE ONLY. Further reproduction of these aerial photo images is prohibited without permission from EDR. For more information contact your EDR Account Executive. Disclaimer - Copyright and Trademark Notice Copyright 2023 by Environmental Data Resources, Inc. All rights reserved. Reproduction in any media or format, in whole or in part, of any report or map of Environmental Data Resources, Inc., or its affiliates, is prohibited without prior written permission.

EDR and its logos (including Sanborn and Sanborn Map) are trademarks of Environmental Data Resources, LLC or its affiliates. All other trademarks used herein are the property of their respective owners. 7287695 - 8 page 2 This Report contains certain information obtained from a variety of public and other sources reasonably available to Environmental Data Resources, LLC. It cannot be concluded from this Report that coverage information for the target and surrounding properties does not exist from other sources. This Report is provided on an “AS IS”, “AS AVAILABLE” basis. NO WARRANTY EXPRESS OR IMPLIED IS MADE WHATSOEVER IN CONNECTION WITH THIS REPORT.

ENVIRONMENTAL DATA RESOURCES, LLC AND ITS SUBSIDIARIES, AFFILIATES AND THIRD PARTY SUPPLIERS DISCLAIM ALL WARRANTIES, OF ANY

KIND OR NATURE, EXPRESS OR IMPLIED, ARISING OUT OF OR RELATED TO THIS REPORT OR ANY OF THE DATA AND INFORMATION PROVIDED IN

THIS REPORT, INCLUDING WITHOUT LIMITATION, ANY WARRANTIES REGARDING ACCURACY, QUALITY, CORRECTNESS, COMPLETENESS,

COMPREHENSIVENESS, SUITABILITY, MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, TITLE, NON-INFRINGEMENT, MISAPPROPRIATION, OR OTHERWISE. ALL RISK IS ASSUMED BY THE USER. IN NO EVENT SHALL ENVIRONMENTAL DATA RESOURCES, LLC OR ITS

SUBSIDIARIES, AFFILIATES OR THIRD PARTY SUPPLIERS BE LIABLE TO ANYONE FOR ANY DIRECT, INCIDENTAL, INDIRECT, SPECIAL,

CONSEQUENTIAL OR OTHER DAMAGES OF ANY TYPE OR KIND (INCLUDING BUT NOT LIMITED TO LOSS OF PROFITS, LOSS OF USE, OR LOSS OF DATA), ARISING OUT OF OR IN ANY WAY CONNECTED WITH THIS REPORT OR ANY OF THE DATA AND INFORMATION PROVIDED IN THIS REPORT.

Any analyses, estimates, ratings, environmental risk levels, or risk codes provided in this Report are provided for illustrative purposes only, and are not intended to provide, nor should they be interpreted as providing any facts regarding, or prediction or forecast of, any environmental risk for any property. Only an assessment performed by a qualified environmental professional can provide findings, opinions or conclusions regarding the environmental risk or conditions in, on or at any property. 10466 of 11211
7287695.8 2020 = 500' 10467 of 11211
7287695.8 2016 = 500' 10468 of 11211
7287695.8 2012 = 500' 10469 of 11211
7287695.8 2009 = 500' 10470 of 11211
7287695.8 2005 = 500' 10471 of 11211
7287695.8 1998 = 500' 10472 of 11211
7287695.8 1993 = 500' 10473 of 11211
7287695.8 1982 = 500' 10474 of 11211
7287695.8 1974 = 500' 10475 of 11211
7287695.8 1968 = 500' 10476 of 11211
7287695.8 1963 = 500' 10477 of 11211
7287695.8 1956 = 500' 10478 of 11211
7287695.8 1946 = 500' 10479 of 11211
7287695.8 1943 = 500' 10480 of 11211
Certified Sanborn® Map Report
Inquiry Number:
6 Armstrong Road, 4th floor
Shelton, CT 06484
Toll Free: 800.352.0050
www.edrnet.com
401 - 445 S B Street 401 S B Street San Mateo, CA 94401 March 23, 2023 7287695.3 10481 of 11211 Certified Sanborn® Map Report
Certified Sanborn Results:

Disclaimer - Copyright and Trademark Notice
EDR and its logos (including Sanborn and Sanborn Map) are trademarks of Environmental Data Resources, LLC or its affiliates. All other trademarks used herein are the property of their respective owners.
- page
The Sanborn Library includes more than 1.2 million
fire insurance maps from Sanborn, Bromley, Perris &
Browne, Hopkins, Barlow and others which track
historical property usage in approximately 12,000
American cities and towns. Collections searched:

Library of Congress
University Publications of America
EDR Private Collection
The Sanborn Library LLC Since 1866™
Limited Permission To Make Copies
Sanborn® Library search results
EDR Inquiry # Contact:

Site Name: Client Name:

Certification #
PO #
Project
1969
1961
1956
1953
1950
1920
1908
1901
1897
1891
1888
03/23/23 401 S B Street 401 - 445 S B Street Langan 135 Main Street Suite 1500 San Mateo, CA 94401 7287695.3 SAn Francisco, CA 94105 Dulce Rodriguez Rivera The Sanborn Library has been searched by EDR and maps covering the target property location as provided by Langan were identified for the years listed below. The Sanborn Library is the largest, most complete collection of fire insurance maps. The collection includes maps from Sanborn, Bromley, Perris & Browne, Hopkins, Barlow, and others. Only Environmental Data Resources Inc. (EDR) is authorized to grant rights for commercial reproduction of maps by the Sanborn Library LLC, the copyright holder for the collection. Results can be authenticated by visiting www.edrnet.com/sanborn.

The Sanborn Library is continually enhanced with newly identified map archives. This report accesses all maps in the collection as of the day this report was generated. 17F6-40A0-B90F 770693400 Maps Provided: 401 - 445 S B Street Certification #: 17F6-40A0-B90F Langan (the client) is permitted to make up to FIVE photocopies of this Sanborn Map transmittal and each fire insurance map accompanying this report solely for the limited use of its customer. No one other than the client is authorized to make copies. Upon request made directly to an EDR Account Executive, the client may be permitted to make a limited number of additional photocopies. This permission is conditioned upon compliance by the client, its customer and their agents with EDR's copyright policy; a copy of which is available upon request.

This Report contains certain information obtained from a variety of public and other sources reasonably available to Environmental Data Resources, LLC. It cannot be concluded from this Report that coverage information for the target and surrounding properties does not exist from other sources. This Report is provided on an “AS IS”, “AS AVAILABLE” basis. NO WARRANTY EXPRESS OR IMPLIED IS MADE WHATSOEVER IN CONNECTION WITH THIS REPORT.

ENVIRONMENTAL DATA RESOURCES, LLC AND ITS SUBSIDIARIES, AFFILIATES AND THIRD PARTY SUPPLIERS DISCLAIM ALL WARRANTIES, OF ANY

KIND OR NATURE, EXPRESS OR IMPLIED, ARISING OUT OF OR RELATED TO THIS REPORT OR ANY OF THE DATA AND INFORMATION PROVIDED IN

THIS REPORT, INCLUDING WITHOUT LIMITATION, ANY WARRANTIES REGARDING ACCURACY, QUALITY, CORRECTNESS, COMPLETENESS,

SUBSIDIARIES, AFFILIATES OR THIRD PARTY SUPPLIERS BE LIABLE TO ANYONE FOR ANY DIRECT, INCIDENTAL, INDIRECT, SPECIAL,

Copyright 2023 by Environmental Data Resources, Inc. All rights reserved. Reproduction in any media or format, in whole or in part, of any report or map of Environmental Data Resources, Inc., or its affiliates, is prohibited without prior written permission. 7287695 3 2 10482 of 11211
- page
Sanborn Sheet Key
This Certified Sanborn Map Report is based upon the following Sanborn Fire Insurance map sheets.
1969 Source Sheets
1969
Volume 1, Sheet 26
1969
Volume 1, Sheet 9
1969
Volume 1, Sheet 10
1961 Source Sheets
1961
Volume 1, Sheet 10
1961
Volume 1, Sheet 9
1961
Volume 1, Sheet 26
1956 Source Sheets
1956
Volume 1, Sheet 26
1956
Volume 1, Sheet 9
1956
Volume 1, Sheet 10
1953 Source Sheets
1953
Volume 1, Sheet 9
1953
Volume 1, Sheet 10
1953
Volume 1, Sheet 26
7287695 3 3
10483 of 11211
- page
Sanborn Sheet Key
This Certified Sanborn Map Report is based upon the following Sanborn Fire Insurance map sheets.
1950 Source Sheets
1950
Volume 1, Sheet 26
1950
Volume 1, Sheet 9
1950
Volume 1, Sheet 10
1920 Source Sheets
1920
Volume 1, Sheet 10
1920
Volume 1, Sheet 9
1920
Volume 1, Sheet 26
1908 Source Sheets
1908
Volume 1, Sheet 15
1908
Volume 1, Sheet 14
1908
Volume 1, Sheet 17
1901 Source Sheets
1901
Volume 1, Sheet 11
1901
Volume 1, Sheet 10
7287695 3 4
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- page
Sanborn Sheet Key
This Certified Sanborn Map Report is based upon the following Sanborn Fire Insurance map sheets.
1897 Source Sheets
1897
Volume 1, Sheet 2
1897
Volume 1, Sheet 3
1891 Source Sheets
1891
Volume 1, Sheet 3
1891
Volume 1, Sheet 2
1888 Source Sheets
1888
Volume 1, Sheet 2
1888
Volume 1, Sheet 3
7287695 3 5
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This Certified Sanborn Map combines the following sheets.

Outlined areas indicate map sheets within the collection. 0 Feet 150 300 600 - page
Certified Sanborn® Map
17F6-40A0-B90F
17F6-40A0-B90F 1969 1969 Order Date: 03/23/2023 Certification # Site Name: Address: 401 - 445 S B Street 401 S B Street City, ST, ZIP: San Mateo, CA 94401 EDR Inquiry: 7287695.3 Client: Langan Copyright Volume 1, Sheet 10
Volume 1, Sheet 9
Volume 1, Sheet 26
7287695 3 6
10486 of 11211
This Certified Sanborn Map combines the following sheets.

Outlined areas indicate map sheets within the collection. 0 Feet 150 300 600 - page
Certified Sanborn® Map
17F6-40A0-B90F
17F6-40A0-B90F 1961 1961 Order Date: 03/23/2023 Certification # Site Name: Address: 401 - 445 S B Street 401 S B Street City, ST, ZIP: San Mateo, CA 94401 EDR Inquiry: 7287695.3 Client: Langan Copyright Volume 1, Sheet 26
Volume 1, Sheet 9
Volume 1, Sheet 10
7287695 3 7
10487 of 11211
This Certified Sanborn Map combines the following sheets.

Outlined areas indicate map sheets within the collection. 0 Feet 150 300 600 - page
Certified Sanborn® Map
17F6-40A0-B90F
17F6-40A0-B90F 1956 1956 Order Date: 03/23/2023 Certification # Site Name: Address: 401 - 445 S B Street 401 S B Street City, ST, ZIP: San Mateo, CA 94401 EDR Inquiry: 7287695.3 Client: Langan Copyright Volume 1, Sheet 10
Volume 1, Sheet 9
Volume 1, Sheet 26
7287695 3 8
10488 of 11211
This Certified Sanborn Map combines the following sheets.

Outlined areas indicate map sheets within the collection. 0 Feet 150 300 600 - page
Certified Sanborn® Map
17F6-40A0-B90F
17F6-40A0-B90F 1953 1953 Order Date: 03/23/2023 Certification # Site Name: Address: 401 - 445 S B Street 401 S B Street City, ST, ZIP: San Mateo, CA 94401 EDR Inquiry: 7287695.3 Client: Langan Copyright Volume 1, Sheet 26
Volume 1, Sheet 10
Volume 1, Sheet 9
7287695 3 9
10489 of 11211
This Certified Sanborn Map combines the following sheets.

Outlined areas indicate map sheets within the collection. 0 Feet 150 300 600 - page
Certified Sanborn® Map
17F6-40A0-B90F
17F6-40A0-B90F 1950 1950 Order Date: 03/23/2023 Certification # Site Name: Address: 401 - 445 S B Street 401 S B Street City, ST, ZIP: San Mateo, CA 94401 EDR Inquiry: 7287695.3 Client: Langan Copyright Volume 1, Sheet 10
Volume 1, Sheet 9
Volume 1, Sheet 26
7287695 3 10 10490 of 11211
This Certified Sanborn Map combines the following sheets.

Outlined areas indicate map sheets within the collection. 0 Feet 150 300 600 - page
Certified Sanborn® Map
17F6-40A0-B90F
17F6-40A0-B90F 1920 1920 Order Date: 03/23/2023 Certification # Site Name: Address: 401 - 445 S B Street 401 S B Street City, ST, ZIP: San Mateo, CA 94401 EDR Inquiry: 7287695.3 Client: Langan Copyright Volume 1, Sheet 26
Volume 1, Sheet 9
Volume 1, Sheet 10
7287695 3 11 10491 of 11211
This Certified Sanborn Map combines the following sheets.

Outlined areas indicate map sheets within the collection. 0 Feet 150 300 600 - page
Certified Sanborn® Map
17F6-40A0-B90F
17F6-40A0-B90F 1908 1908 Order Date: 03/23/2023 Certification # Site Name: Address: 401 - 445 S B Street 401 S B Street City, ST, ZIP: San Mateo, CA 94401 EDR Inquiry: 7287695.3 Client: Langan Copyright Volume 1, Sheet 17
Volume 1, Sheet 14
Volume 1, Sheet 15
7287695 3 12 10492 of 11211
This Certified Sanborn Map combines the following sheets.

Outlined areas indicate map sheets within the collection. 0 Feet 150 300 600 - page
Certified Sanborn® Map
17F6-40A0-B90F
17F6-40A0-B90F 1901 1901 Order Date: 03/23/2023 Certification # Site Name: Address: 401 - 445 S B Street 401 S B Street City, ST, ZIP: San Mateo, CA 94401 EDR Inquiry: 7287695.3 Client: Langan Copyright Volume 1, Sheet 10
Volume 1, Sheet 11
7287695 3 13 10493 of 11211
This Certified Sanborn Map combines the following sheets.

Outlined areas indicate map sheets within the collection. 0 Feet 150 300 600 - page
Certified Sanborn® Map
17F6-40A0-B90F
17F6-40A0-B90F 1897 1897 Order Date: 03/23/2023 Certification # Site Name: Address: 401 - 445 S B Street 401 S B Street City, ST, ZIP: San Mateo, CA 94401 EDR Inquiry: 7287695.3 Client: Langan Copyright Volume 1, Sheet 3
Volume 1, Sheet 2
7287695 3 14 10494 of 11211
This Certified Sanborn Map combines the following sheets.

Outlined areas indicate map sheets within the collection. 0 Feet 150 300 600 - page
Certified Sanborn® Map
17F6-40A0-B90F
17F6-40A0-B90F 1891 1891 Order Date: 03/23/2023 Certification # Site Name: Address: 401 - 445 S B Street 401 S B Street City, ST, ZIP: San Mateo, CA 94401 EDR Inquiry: 7287695.3 Client: Langan Copyright Volume 1, Sheet 2
Volume 1, Sheet 3
7287695 3 15 10495 of 11211
This Certified Sanborn Map combines the following sheets.

Outlined areas indicate map sheets within the collection. 0 Feet 150 300 600 - page
Certified Sanborn® Map
17F6-40A0-B90F
17F6-40A0-B90F 1888 1888 Order Date: 03/23/2023 Certification # Site Name: Address: 401 - 445 S B Street 401 S B Street City, ST, ZIP: San Mateo, CA 94401 EDR Inquiry: 7287695.3 Client: Langan Copyright Volume 1, Sheet 3
Volume 1, Sheet 2
7287695 3 16 10496 of 11211
EDR Historical Topo Map Report
Inquiry Number:
6 Armstrong Road, 4th floor
Shelton, CT 06484
Toll Free: 800.352.0050
www.edrnet.com
with QuadMatch™
401 - 445 S B Street 401 S B Street San Mateo, CA 94401 March 23, 2023 7287695.4 10497 of 11211 EDR Historical Topo Map Report
EDR Inquiry #
Search Results:

P.O.#
Project:

Maps Provided:

Latitude:

Longitude:

UTM Zone:

UTM X Meters:

UTM Y Meters:

Elevation:

Contact:

Site Name: Client Name:
2018
2015
2012
1997
1993
1980
1973
1968
1956
1949
1947
1939
1915
1899
1896
03/23/23 401 - 445 S B Street Langan 401 S B Street 135 Main Street Suite 1500 San Mateo, CA 94401 SAn Francisco, CA 94105 7287695.4 Dulce Rodriguez Rivera EDR Topographic Map Library has been searched by EDR and maps covering the target property location as provided by Langan were identified for the years listed below. EDR’s Historical Topo Map Report is designed to assist professionals in evaluating potential liability on a target property resulting from past activities. EDRs Historical Topo Map Report includes a search of a collection of public and private color historical topographic maps, dating back to the late 1800s. 770693400 37.564684 37° 33' 53" North 401 - 445 S B Street -122.320868 -122° 19' 15" West Zone 10 North 559977.07 4157734.31 29.00' above sea level This Report contains certain information obtained from a variety of public and other sources reasonably available to Environmental Data Resources, LLC. It cannot be concluded from this Report that coverage information for the target and surrounding properties does not exist from other sources. This Report is provided on an “AS IS”, “AS AVAILABLE” basis. NO WARRANTY EXPRESS OR IMPLIED IS MADE WHATSOEVER IN CONNECTION WITH THIS REPORT.

ENVIRONMENTAL DATA RESOURCES, LLC AND ITS SUBSIDIARIES, AFFILIATES AND THIRD PARTY SUPPLIERS DISCLAIM ALL WARRANTIES, OF ANY

KIND OR NATURE, EXPRESS OR IMPLIED, ARISING OUT OF OR RELATED TO THIS REPORT OR ANY OF THE DATA AND INFORMATION PROVIDED IN

THIS REPORT, INCLUDING WITHOUT LIMITATION, ANY WARRANTIES REGARDING ACCURACY, QUALITY, CORRECTNESS, COMPLETENESS,

SUBSIDIARIES, AFFILIATES OR THIRD PARTY SUPPLIERS BE LIABLE TO ANYONE FOR ANY DIRECT, INCIDENTAL, INDIRECT, SPECIAL,

7.5-minute, 24000
2015 Source Sheets
2015
San Mateo

7.5-minute, 24000
2012 Source Sheets
2012
San Mateo

7.5-minute, 24000
1997 Source Sheets
1997
San Mateo

7.5-minute, 24000
Aerial Photo Revised 1997
7287695 4 3
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page
Topo Sheet Key
This EDR Topo Map Report is based upon the following USGS topographic map sheets. -
1993 Source Sheets
1993
San Mateo

7.5-minute, 24000
Aerial Photo Revised 1993
1980 Source Sheets
1980
San Mateo

7.5-minute, 24000
Aerial Photo Revised 1978
1973 Source Sheets
1973
San Mateo

7.5-minute, 24000
Aerial Photo Revised 1973
1968 Source Sheets
1968
San Mateo

7.5-minute, 24000
Aerial Photo Revised 1968
7287695 4 4
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page
Topo Sheet Key
This EDR Topo Map Report is based upon the following USGS topographic map sheets. -
1956 Source Sheets
1956
San Mateo

7.5-minute, 24000
Aerial Photo Revised 1946
1949 Source Sheets
1949
San Mateo

7.5-minute, 24000
Aerial Photo Revised 1946
1947 Source Sheets
1947
San Mateo

7.5-minute, 24000
Aerial Photo Revised 1946
1939 Source Sheets
1939
San Mateo
15-minute, 62500
Aerial Photo Revised 1939
7287695 4 5
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page
Topo Sheet Key
This EDR Topo Map Report is based upon the following USGS topographic map sheets. -
1915 Source Sheets
1915
San Mateo
15-minute, 62500
1899 Source Sheets
1899
San Mateo
15-minute, 62500
1896 Source Sheets
1896
San Mateo
15-minute, 62500
7287695 4 6
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Historical Topo Map
page
SITE NAME:

ADDRESS:

CLIENT: