july 31, 2018 - edl...2018/08/07 · executive environmental paramount unified school district...

July 31, 2018 Paramount Unified School District 15110 California Avenue Paramount, CA 90723 Re: EE Project # 16-Z0007-0237.1.1 Air and Tape Sampling Results Collected on December 18, 2017 Lincoln and Gaines Elementary Schools Thank you for the opportunity to assist Paramount Unified School District with its health and safety concerns. The purpose of this letter is to publicly share the data that has been held with the anticipation of joint sampling with the Los Angeles County Department of Public Health (LADPH) in accordance with the memorandaA from Leighton Consulting to the LADPH dated November 17, 2017 (Appendix A.) Initially, LACDPH had wanted to do joint sampling with the District on November 21, 2017. On November 21, 2017, LACDPH chose not to participate in this initial sampling following LACDPH’s protocol because of LACDPH’s reluctance to enter into a Memo of Understanding (MOU) between the District and LACDPH. The sampling was delayed at the LACDPH’s request to December 18, 2017, to allow LACDPH additional time to finalize a MOU. On December 15, 2017, LACDPH was still reluctant to enter into the MOU. Consequently, the District recognizing the importance of a second sampling set, chose to move ahead with the sampling on December 18, 2017. Initially, Executive Environmental (EE) recommended holding the results until joint sampling could be completed on a subsequent sampling date of April 2, 2018. LACDPH was again reluctant to enter into a MOU on March 30, 2018 resulting in canceling of the April 2, 2018 sampling as recommended by EE. At the time, EE felt that a third sampling set would provide no new information, and would reaffirm the data already collected. On December 18, 2017, EE collected a variety of samples: 24-hour air samples collected from 12 AM December 18, 2017, to 12 AM December 19, 2017 for Hexavalent Chromium and Title 22 metals excluding silver and mercury; and wipe samples for Hexavalent Chromium and Title 22 metals excluding silver and mercury. Samples were collected at the following locations:

Gaines Elementary School, Indoors, Room #1 Gaines Elementary School, Indoors, Room #23 Gaines Elementary School, Outdoors on Roof of Room #1 (misidentified on the COC as

Room #3) Lincoln Elementary School, Indoors, Room #3, Computer Room/Library Lincoln Elementary School, Indoors, Room #3, Computer Room/Library, Replicate Lincoln Elementary School, Indoors, Room #31 Lincoln Elementary School, Outdoors on Roof of Room #3, Computer Room/Library

Samples were analyzed by several laboratories:

Hexavalent Chromium air samples were analyzed by American Environmental Testing Laboratories (AETL) in Burbank. California.

A Los Angeles County Department of Public Health (LACDPH) “Technical Memorandum - Field Sampling Protocol for the Collection of Dust and Air Samples from Schools Located in the City of Paramount, California” dated November 17, 2017

Executive Environmental Paramount Unified School District Project No 16-Z0007-0237.1.1 2 July 31, 2018

Title 22 Metals (excluding silver and mercury) air samples were analyzed by SGS Galson Laboratories in Syracuse New York.

Wipe samples for both Title 22 Metals (excluding silver and mercury) and Hexavalent Chromium were submitted for analysis to EMSL Analytical in Cinnaminson, New Jersey. Although EMSL had confirmed that they could do the analysis, upon receipt they returned them indicating that the method request for hexavalent chromium was archaic and outdated. Following receipt of the return of the wipe samples, Title 22 Metal wipe samples were submitted to AETL. By the time the Hexavalent Chromium wipe samples were received, they could not be analyzed because the hold time had expired.

Sample results with respective chain of custodies (COC) are in Appendix B. Executive Environmental (EE) used the Los Angeles County Department of Public Health (LACDPH) “Technical Memorandum - Field Sampling Protocol for the Collection of Dust and Air Samples from Schools Located in the City of Paramount, California” dated November 17, 2017, as prepared for them by Leighton Consulting, Inc. All samples were analyzed in accordance with methods outlined in the aforementioned protocols. Dust samples were not collected because LACDPH was to collect the samples during the joint sampling with EE observing. Since LACDPH chose not to participate in the sampling, there was insufficient time to obtain the media and equipment to collect the samples. Sample results indicate the following: Hexavalent Chromium Air samples indicate that the levels ranged from less than the Limit

of Detection (ug/M3]) to 0.000720 ug/M3. These findings are not significantly different from the results found earlier in August 2017 using a different method.

Air samples tested for various Title 22 Metals were well below all California Division of Occupational Safety and Health (DOSH -- better known as Cal/OSHA) regulated levels. In addition, all levels were well below the American Conference of Governmental Industrial Hygienist Threshold Limit Value (TLV). Furthermore, all levels were also below the non-regulatory California Office of Environmental Health Hazard Assessment (OEHHA) Levels. Moreover, the vast majority of results were below the limit of detection for the specific metal analyzed and the analytical method used.

Dust wipe samples tested for various Title 22 Metals were well below the Total Threshold Limit Concentration (TTLC), the Soluble Threshold Limit Concentration (STLC), and the Toxicity Characteristic Leaching Procedure (TCLP). Moreover, the vast majority of results were below the limit of detection for the specific metal analyzed and the analytical method used.

All data collected to date, indicate that the children, faculty, staff and site visitors are not at an elevated exposure for the tested targets while inside the classrooms. EE will continue to hold off on a final report until the LACDPH releases their report for the residential samples collected in June of 2017. Although not necessary, the current results should be evaluated in terms of the criteria established by and published in the LACDPH residential report. Based on the sampling results to date, the classroom air sampling by EE, the results from the Village Skate Park dust samples, and the results of Village Skate Park soil sampling, there is no immediate need to collect wipe samples or bulk samples because the sampling results to date do not support that there is an accumulation of settled hexavalent chromium-containing dust. This lack of need is further supported by the standard operating procedures used by the District:

The District currently uses vacuums that are equipped with High Efficiency Particulate Air (HEPA) filters as compared with residential units that typically do not contain HEPA filters;

The District’s on-going routine maintenance of the Heating, Ventilation and Air Conditioning (HVAC) System, as compared to the infrequent maintenance of residential HVAC Systems commonly seen or the absence of residential HVAC Systems,

Executive Environmental Paramount Unified School District Project No 16-Z0007-0237.1.1 3 July 31, 2018

The District’s current filters that are used are a MERVB 10, as compared with the typical school use of a MERV 8, as compared to residential units which typically use MERV 4.

The District is not only doing all that they can to prevent a potential exposure to students, faculty and staff but have gone above and beyond with their maintenance of the HVAC System, deployment of HEPA equipped vacuums, increase in the filters’ MERV rating from an 8 to 10, and proactively collecting air samples in the representative rooms.

RECOMMENDATIONS

18-07-A. Prepare a final report for distribution once the LACDPH finalizes and publishes their report for the Residential Study completed in 2017.

1. In this final report, the District should re-evaluate the District data in terms of the criteria presented in the Residential Study Report when it is published.

18-07-B. No further sampling is recommended at this time.

1. The District should consider resampling if there are new emitters or new exposure criteria at the Federal, State, or Local Levels.

2. If additional sampling is considered, it should be done on a regular school day in which the students are present during the academic term. Sampling should not be done on the weekend or holidays that are not representative of a typical school day.

DISCLAIMER All reports and recommendations are based on conditions and practices observed and information made available to Executive Environmental Services Corporation (EESC) by the client and the designated sites/facilities on the days sampling was conducted. EESC reports do not purport to set forth all hazards or to indicate that other hazards do not exist. No responsibility is assumed by EESC for the control or correction of conditions or practices existing at the facilities, or at any other premises surveyed by EESC for and on the behalf of the client. Services provided by EESC shall be governed by the standard of practice for professional services measured at the time those services are rendered.

This letter continues on the next page with signatures. The remainder of the page is blank.

B MERV – Minimum efficiency reporting value, commonly known as MERV rating, is a measurement scale designed in 1987 by the American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE) to rate the effectiveness of air filters

Executive Environmental Paramount Unified School District Project No 16-Z0007-0237.1.1 4 July 31, 2018 It is a pleasure to assist you with making the Paramount Unified School district a safer and healthier institution. If you have any questions, or if we can be of further assistance, please contact our office at (626) 441-7050. Sincerely, Report by, Reviewed by, Daniel H. Ginsborg, MSIH, CIH, CSP Vicki M. Uchida, MBA, CIH, CSP Chief Executive Officer/Principal Industrial Hygienist Senior Industrial Hygienist

Kay Mills, MSIH, CSP Senior Industrial Hygienist

End of Document. The remainder of the page is blank.

Appendix A

Los Angeles County Department of Public Health “Technical Memorandum ‐ Field Sampling Protocol for the Collection of Dust and Air Samples from Schools Located in the City of

Paramount, California” dated November 17, 2017

November 17, 2017

Project No. 11561.004

To: Los Angeles County Department of Public Works 900 South Fremont Avenue Alhambra, California 91803-1331 Attention: Mr. Gregory Sena and Ms. Katherine Butler (Los Angeles County

Department of Public Health) Subject: Technical Memorandum - Field Sampling Protocol for the Collection of Dust

and Air Samples from Schools Located in the City of Paramount, California INTRODUCTION Leighton Consulting, Inc. (Leighton Consulting) is pleased to present this technical memorandum documenting the protocols for the collection of dust/surface particulate (referred to as “dust” throughout this memorandum) and air samples from schools located within the Paramount Unified School District (the District) in the City of Paramount, California. A Job Hazard Analysis (JHA) which discusses the potential hazards and safety protocols is included as an attachment. Leighton Consulting will collect samples at schools selected by the Los Angeles County Department of Public Health (Public Health). Schools that will be tested include Abraham Lincoln Elementary School located at 15324 California Avenue and Wesley Gaines Elementary School located at 7340 Jackson Street. The District will be informed that they should maintain their normal building configuration and that the air handling systems should be operational and programmed to replicate a typical school day with full occupancy. The District will also be informed that the classrooms should be representative of a typical cleaning schedule but that deep cleaning or any other special holiday break cleaning should not be conducted prior to sampling. The samples will include indoor surface dust collected on wipes, indoor bulk dust collected with a vacuum, and indoor and outdoor ambient air. The samples will be collected for the analysis of Title 22 metals and hexavalent chromium (CrVI).

17781 Cowan ■ Irvine, CA 92614-6009 949.250.1421 ■ Fax 949.250.1114 ■ www.leightonconsulting.com

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FIELD SAMPLING PROTOCOL

The order of sample collection will be as follows: 1) surface wipe samples, 2) bulk dust sample, and 3) outdoor and indoor air samples. The air samples will be collected for a period of 24 hours from 12 am to 12 am on November 21 to mirror the sampling period collected by South Coast Air Quality Management District as part of their on-going ambient air testing program within the City of Paramount. The bulk dust sampling will not be conducted while the air samples are being collected. The sampling locations will include two classrooms and one outdoor location from each school. The sample locations will be selected based on the orientation of the campus and the proximity to facility sources. Surface Wipe Sampling Three surface wipe sample locations will be selected from the interior of two classrooms from each school. One wipe will be collected from each location for the analysis of Title 22 metals and another adjacent or nearby wipe for the analysis of CrVI. The sampling locations will consist of randomly selected surfaces in each classroom. Potential sampling locations may include hard flooring, counter tops and/or window sills. Preference for sampling locations are west facing (from the prevailing wind direction), dusty areas (i.e. windowsill) where there could be infiltration from the outside. Only smooth, impervious surfaces, such as glass, enameled or laminated surfaces, coated surfaces, and vinyl or ceramic floors will be sampled using wipe and contact sampling protocols. Wipe sampling protocols are not applicable for surfaces with porous or non-impervious media (e.g., concrete, wood, asphalt, plasterboard). The wipes will consist of laboratory supplied pre-moistened sterile gauze pads stored in glass jars. Wipe samples will be collected over a 100 cm2 surface area using the wipes and disposable 100 cm2 templates. Duplicate samples and field blanks will be collected at a rate of 10 percent of the total number of samples collected for each analytical method. One trip blank will be submitted per each day of sampling for each analytical method. The steps to collect the samples include the following: 1. Wear a pair of clean disposable nitrile gloves.

2. Place the disposable 100 cm2 template over the surface area to be sampled, and secure the outside edges with blue painter’s-type masking tape.

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3. Remove the laboratory prepared wipe from its container and fold into fourths.

4. Wipe the horizontal surface area with firm pressure. Use an overlapping “S” wiping pattern to cover the entire surface area with five (5) back and forth strokes.

5. Fold the wipe to exposed a fresh gauze surface and wipe the same area using five (5) top to bottom “S” strokes.

6. Fold the wipe once more to reveal an unexposed gauze surface, and wipe the surface a third time as described in Item 4.

7. After sampling, fold the wipe such that the used portions of the gauze are not exposed and place the wipe sample in a clean laboratory supplied sample jar. The CrVI wipe will be placed in an amber jar or covered with aluminum foil to prevent exposure to sunlight. Seal securely. Label the sample container clearly.

8. A new, disposable template should be used for each sample location.

9. Replace the gloves for each sample location. Used gloves should be disposed of in a durable, sealable bag, such as a ZipLock bag.

Bulk Dust Sampling A composite bulk dust sample will be collected from two classrooms in each school using a Pullman Hold model 45-D HEPA vacuum sampler specified to capture 99.97% of all particles 0.3 µm and larger. The composite sample will be collected by vacuuming the floor surface throughout the classroom. In addition, other observed dusty areas in the classroom may be vacuumed including storage closets, window sills, desks, tables, book shelves, etc. The dust will be collected into DUSTREAM collectors fitted with a 40 micron nylon mesh filter. A minimum of six 1-gram DUSTSTREAM samples will be collected from each room, provided that the dust material present is sufficient. The procedure for collecting samples in the DUSTREAM collectors is as follow: 1. Wearing a pair of clean disposable nitrile gloves, insert the nylon filter into the DUSTREAM™ collector and attach the collector to the vacuum cleaner tube. 2. If the collector does not fit the vacuum cleaner tube, attach the adaptor piece to the collector. Use the size of the adaptor which fits your vacuum cleaner, it can be turned around.

11561.004

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3. Turn on the vacuum cleaner and vacuum the desired area. 4. Perform a minimum of two orthogonal passes of the surface and vacuum until there is no visible dust or particulate matter. 5. Remove the nylon filter containing the dust sample and place it in a small Ziploc bag or envelope. It can be sealed with parafilm for transportation. Place a clean nylon filter inside for repeat sampling. Multiple nylon filters will be composited for a representative dust sample. 6. Replace with a clean Dustream collector to start a new area. Additional dust may be collected in a vacuum bag to ensure that a suitable quantity is collected if considered necessary. The rubber plastic hosing and vacuum head will be replaced between each sample area. Air Sampling An indoor air sample will be collected from two classrooms at each school. One outdoor air sample will be collected from each school. Indoor air samples will be collected from one central location within the classroom, a minimum of 5 feet from a wall and within the breathing zone at an approximate height of 3 to 6 feet above the floor surface. Outdoor air samples will be collected from rooftop locations and the filters will be placed at an approximate height of 3 to 6 feet above the roof surface. The samples will be collected with an SKC Leland Legacy pump for a period of 24 hours. Title 22 metals will be collected on a laboratory-supplied 37-mm polyvinyl chloride (PVC) pre-weighed filter loaded in an SKC styrene cartridge, and the pump will be calibrated to a rate of 10 Liters per minute (L/min). CrVI will be collected on a laboratory-supplied 37-mm sodium bicarbonate treated cellulose filter loaded in an SKC styrene cartridge and the pump will be calibrated to a rate of 10 L/min. The sodium bicarbonate treated cellulose filters will be kept frozen after preparation and will be kept chilled to a temperature of approximately 4 degrees Celsius during transport. The pumps and filters will be placed a minimum of three feet apart. Duplicate samples and field blanks will be collected at a rate of 10 percent of the total number of samples collected for each analytical method. One trip blank will be submitted per each day of sampling for each analytical method. The steps to collect the samples include the following:

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1. Fully charge each pump the night before sampling.

2. Calibrate each pump with using a representative in-line sampler to the appropriate

volume per minute. Set the pump on a stable flat surface and plug into an electrical outlet. In the event of a power failure, the pump battery will provide backup power supply. Program the pump to collect a sample for a period of 24-hours.

3. Wearing a pair of clean disposable nitrile gloves, remove the protective caps from the inlet and outlet of the cartridge.

4. Connect the cartridge to the pump via flexible tubing. The side of the cartridge

marked “outlet” should be connected to the tubing and the side marked “inlet” should be facing outward. A tripod may be used to place the cartridge at an appropriate height.

5. Record the start time and flow rate.

6. After a period of 24 hours, turn off the pump and record the end time and flow rate

and calculate an average flow rate.

7. Wearing a pair of clean disposable nitrile gloves, remove the cartridge from the pump and replace the protective caps over the inlet and outlet of the cartridge. Label the cartridge with the sample ID and place the cartridge in a clean glass jar or protective bag, such as a ziplock.

8. The CrVI samples collected on the cellulose filters will be placed on blue ice and

chilled to a temperature of approximately 4 degrees Celsius during transport to the laboratory.

LABORATORY ANALYSIS The wipe samples will be submitted to Eurofins Calscience in Garden Grove, California, for analysis of Title 22 Metals (with the exception of mercury) by Environmental Protection Agency (EPA) Method 6010B and for CrVI by EPA Method 7199. The bulk dust samples will be submitted to Eurofins Calscience in Garden Grove, California. Prior to analysis, the vacuum bags will be cut open to allow the dust to air-dry for a minimum of 24-hours. The laboratory will manually remove pet and human

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hair and large particles and the samples will be sieved to fine (<125 µm) and coarse (125 µm) size fractions using a sieved shaker and stainless steel sieves. The masses of the fine and coarse dust fractions will be weighed and reported. The samples will be sent to SGS Galson Laboratories in Syracuse, New York, and the fine dust size fraction will be analyzed for Title 22 metals (with exception of mercury, silver, and vanadium) by modified SW846 3050B/6010C/OSHA 125G ICP and hexavalent chromium by in-house method IC-SOP-15; IC/UV. A minimum of 2 grams is required for the analyses, in the event that the fine fraction does not total 2 grams, the lab will be instructed to combine the fine and course fractions for analysis. The air samples collected for Title 22 metals analysis (with the exception of mercury and silver) will be submitted to SGS Galson Laboratories in Syracuse, New York, for analysis by NIOSH 0500/7300. The air samples collected for CrVI analysis will be submitted American Environmental Testing Laboratory located in Burbank, California, for analysis by CARB 039. Sample information will be recorded on a chain-of-custody and submitted to each laboratory along with the corresponding samples. Each of the samples will be analyzed within the method hold time. The analytical laboratories will be instructed to note analytes that are detected below the reporting limit but above the method detection limit (i.e. a J-Flag reported quantity). The laboratories will analyze quality control samples to measure accuracy precision, including method blanks, laboratory control samples, and matrix spike and matrix spike duplicates. The laboratory analytical reports will be provided within approximately ten business days following receipt of the samples by the laboratory.

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PLAN ACCEPTANCE FORM Instructions: This form is to be completed by all Leighton Consulting personnel and subcontractors to work on the subject project work site. Project No.: 11561.004 Client: Los Angeles County Department of Public Works I represent that I have read and understood the contents of the above plan and agree to perform my work in accordance with it. Signed Date Signed Date Signed Date Signed Date Signed Date Signed Date Signed Date Signed Date

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INTRODUCTION

This Job Hazard Analysis (JHA) identifies the steps involved in performing a specific job, the existing or potential safety and health hazards associated with each step, and the recommended action(s)/procedure(s) that will eliminate or reduce these hazards and the risk of a workplace injury or illness. This JHA has been prepared for the sampling activities that will be conducted at schools located in the City of Paramount, California. The following hazards were considered in the completion of this JHA:

Impact with a falling object.

Penetration of sharp objects.

Caught in or between a stationary/moving object (including traffic).

Falls from an elevated work platform, ladders or stairs.

Excessive lifting, twisting, pushing, pulling, reaching, or bending.

Exposure to vibrating power tools, excessive noise, cold or heat, or harmful levels of gases, vapors, liquids, fumes, or dusts.

Repetitive motion.

Electrical hazards.

Water (potential for drowning or fungal infections caused by wetness).

Animal hazards.

The site safety officer (SSO) will hold a site specific health and safety meeting prior to start of work. All Leighton Consulting personnel and its subcontractors who will work at the Site will read and agree to follow this JHA before performing any fieldwork. This will be documented by having all field personnel sign the Plan Acceptance Form in the front of the JHA.

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SCOPE OF SERVICES

School Sampling Activities

The interior and exterior grounds of select schools located the Paramount Unified School District in the City of Paramount will be accessed in order to collect an indoor vacuum dust sample, indoor wipe samples from flat surfaces, and indoor and outdoor air samples utilizing a pump connected to a filter. The samples will be analyzed for Title 22 Metals and hexavalent chromium. The scope of services is further described in the field procedures document.

JOB HAZARD ANALYSIS

The primary hazards associated with sampling activities inside of residences include:

1. Potential accidents from traffic while in route to the schools.

2. Potential falls when accessing sampling areas, such as via stairways or ladders.

3. Potential cuts, bruises and abrasions from sampling equipment and/or on-site conditions.

4. Electrical accidents when plugging in electrical equipment.

5. Potential stress or strains from lifting, twisting, pushing, pulling, reaching, or bending during use of the HEPA exhaust vacuum sampler.

JOB HAZARD CONTROL Observation of surroundings is of utmost importance in preventing falls, accidents associated with equipment/onsite conditions, and traffic accidents. If roof access is via fixed vertical ladders, they will be inspected for integrity. Equipment will be inspected for electrical integrity and those with faulty wiring or other potential issues will be replaced immediately. Compliance with OSHA and EPA safety regulations will be followed.

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EMERGENCY CONTACTS AND PROCEDURES

In the event of an emergency, call 911. In case of any situation or unexpected occurrence that requires outside assistance or support, the proper contact from the following list will be made:

Emergency Contacts

Agency Name of Contact Telephone No.

Ambulance n/a 911

Fire n/a 911

Police n/a 911

Promise Hospital of East L.A.

16453 South Colorado Avenue

Paramount, CA 90723

Kaiser Permanente Downey Medical Center, 9333 Imperial Highway, Downey, CA 90242

Emergency Room 562-531-3110

562-657-9000

Project Manager Meredith Church (949) 293-2519

Site Safety Officer Meredith Church (949) 293-2519

Poison Control Center n/a (714) 634-5988 (213) 484-5151

Leighton Consulting’s Medical Emergency Doctor

U.S. Health Works (949) 863-9103

The following page depicts the hospitals nearest to the City of Paramount capable of handling injuries.

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Promise Hospital of East Los Angeles

Kaiser Permanente Downey Medical Center

Abraham Lincoln Elementary School

Wesley Gaines Elementary School

Appendix B

Laboratory Results

Job Number Order Date Client 90624 12/20/2017 EXEENV

Number of Pages 5 Date Received 12/20/2017 Date Reported 12/27/2017

Executive Environmental Services Co310 East Foothill Blvd. Ste.200Arcadia, CA 91006-

Project ID:Project Name:

17-A0007-0237.1.117-A0007-0237.1.1

Ordered By

Attention: Daniel H GinsborgTelephone: (626)441-7050

Enclosed please find results of analyses of 10 ambient airsamples which were analyzed as specified on the attachedchain of custody. If there are any questions, please do nothesitate to call.

Site: Zip Code: 90723

2834 & 2908 North Naomi Street Burbank, CA 91504 • DOHS NO: 1541, LACSD NO: 10181Tel: (888) 288-AETL • (818) 845-8200 • Fax: (818) 845-8840 • www.aetlab.com

American Environmental Testing Laboratory Inc.

Cyrus Razmara, Ph.D.Laboratory Director

Approved By:Checked By:


Project ID: 17-A0007-0237.1.1

Date Received 12/20/2017

Date Reported 12/27/2017

Executive Environmental Services Co

310 East Foothill Blvd. Ste.200

Arcadia, CA 91006-

Ordered By


Page: 1 A

AETL received 10 samples with the following specification on 12/20/2017.

CERTIFICATE OF ANALYSISCASE NARRATIVE



Lab ID Sample ID Sample Date Matrix Quantity Of Containers90624.01 C01 12/18/2017 Gaseous 1

90624.02 C02 12/18/2017 Gaseous 1

90624.03 C03 12/18/2017 Gaseous 1

90624.04 C04 12/18/2017 Gaseous 1

90624.05 C05 12/18/2017 Gaseous 1

90624.06 C06 12/18/2017 Gaseous 1

90624.07 C07 12/18/2017 Gaseous 1

90624.08 C08 12/18/2017 Gaseous 1

90624.09 C09 12/18/2017 Gaseous 1

90624.10 C10 12/18/2017 Gaseous 1

Method ^ Submethod Priority TAT UnitsReq Date

CARB-039 ^ UG/M3 2 Normal ug/m312/27/2017

The samples were analyzed as specified on the enclosed chain of custody.No analytical non-conformances were encountered.

Results of analysis are blank subtracted.

Cyrus Razmara, Ph.D.

Laboratory Director


QC Batch No: 122617-1

90624 12/20/2017 EXEENV

AETL Job Number Submitted Client

Zip Code: 90723Executive Environmental Services Co310 East Foothill Blvd.Ste.200Arcadia, CA 91006-


17-A0007-0237.1.117-A0007-0237.1.1

2Page:

Ordered By

Attn: Daniel H Ginsborg

SiteANALYTICAL RESULTS

Telephone: (626)441-7050

Method: CARB-039, Determination of Hexavalent Chromium in Ambient Air by IC



Date Sampled 12/18/201712/18/201712/18/201712/18/2017

Dilution Factor 1 1 1 1 1Units ug/m3 ug/m3 ug/m3 ug/m3 ug/m3Matrix Gaseous Gaseous Gaseous Gaseous GaseousDate Analyzed 12/26/2017 12/26/2017 12/26/2017 12/26/2017 12/26/2017

Date Prepared 10/26/2017 10/26/2017 10/26/2017 10/26/2017 10/26/2017

C01 C04C03C02Client Sample I.D.

Analytes MDL Results Results Results Results ResultsPQL

Preparation Method CARB039 CARB039 CARB039 CARB039 CARB039

Our Lab I.D. 90624.02 90624.03 90624.0490624.01Method Blank

0.00026Chromium (VI) 0.00026 ND ND ND ND 0.000590


90624 12/20/2017 EXEENV




17-A0007-0237.1.117-A0007-0237.1.1

3Page:

Ordered By



Telephone: (626)441-7050




Date Sampled 12/18/201712/18/201712/18/201712/18/201712/18/2017

Dilution Factor 1 1 1 1 1Units ug/m3 ug/m3 ug/m3 ug/m3 ug/m3Matrix Gaseous Gaseous Gaseous Gaseous GaseousDate Analyzed 12/26/2017 12/26/2017 12/26/2017 12/26/2017 12/26/2017

Date Prepared 10/26/2017 10/26/2017 10/26/2017 10/26/2017 10/26/2017

C05 C06 C09C08C07Client Sample I.D.


Preparation Method CARB039 CARB039 CARB039 CARB039 CARB039

Our Lab I.D. 90624.07 90624.08 90624.0990624.0690624.05

0.00026Chromium (VI) 0.00026 ND 0.000720 ND ND ND


90624 12/20/2017 EXEENV




17-A0007-0237.1.117-A0007-0237.1.1

4Page:

Ordered By



Telephone: (626)441-7050




Date Sampled 12/18/2017

Dilution Factor 1Units ug/m3Matrix GaseousDate Analyzed 12/26/2017

Date Prepared 10/26/2017

C10Client Sample I.D.

Analytes MDL ResultsPQL

Preparation Method CARB039

Our Lab I.D. 90624.10

0.00026Chromium (VI) 0.00026 ND

90624 12/20/2017 EXEENV




17-A0007-0237.1.117-A0007-0237.1.1

5Page:

Ordered By


Site

Telephone: (626)441-7050




QUALITY CONTROL RESULTS

AnalytesLCS LCSLCS LCS DUP LCS DUP LCS DUP LCS RPD LCS/LCSD LCS RPD

Concen % RECRecov Concen Recov % REC % REC % Limit % Limit

QC Batch No: 122617-1; LCS: Blank; LCS Prepared: 10/26/2017; LCS Analyzed: 12/26/2017; Units: ug/m3

Chromium (VI) <20 0.0136 0.0143 105 0.0136 0.0135 99.1 5.8 75-125


Number of Pages 7 Date Received 12/27/2017 Date Reported 01/10/2018

Executive Environmental Services Co310 East Foothill Blvd. Ste.200Arcadia, CA 91006-


17-A0007-0237.1.117-A0007-0237.1.1

Ordered By


Enclosed please find results of analyses of 14 wipe sampleswhich were analyzed as specified on the attached chain ofcustody. If there are any questions, please do not hesitate tocall.



Cyrus Razmara, Ph.D.Laboratory Director



Project ID: 17-A0007-0237.1.1

Date Received 12/27/2017

Date Reported 01/11/2018

Executive Environmental Services Co

310 East Foothill Blvd. Ste.200

Arcadia, CA 91006-

Ordered By


Page: 1 A

AETL received 14 samples with the following specification on 01/05/2018.

CERTIFICATE OF ANALYSISCASE NARRATIVE



Lab ID Sample ID Sample Date Matrix Quantity Of Containers90688.01 W01 12/18/2017 Solid 1

90688.02 W02 12/18/2017 Solid 1

90688.03 W03 12/18/2017 Solid 1

90688.04 W04 12/18/2017 Solid 1

90688.05 W05 12/18/2017 Solid 1

90688.06 W06 12/18/2017 Solid 1

90688.07 W07 12/18/2017 Solid 1

90688.08 W08 12/18/2017 Solid 1

90688.09 W09 12/18/2017 Solid 1

90688.10 W10 12/18/2017 Solid 1

90688.11 W11 12/18/2017 Solid 1

90688.12 W12 12/18/2017 Solid 1

90688.13 W13 12/18/2017 Solid 1

90688.14 W14 12/18/2017 Solid 1

Method ^ Submethod Priority TAT UnitsReq Date

6010BSCAN ^ WIPE-T22 2 Normal ug/100cm201/03/2018

The samples were analyzed as specified on the enclosed chain of custody.No analytical non-conformances were encountered.

Unless otherwise noted, all results of soil and solid samples are based on wetweight.

Results of analysis have been blank subtracted.

Cyrus Razmara, Ph.D.

Laboratory Director


QC Batch No: 0108182C6

90688 12/27/2017 EXEENV


Executive Environmental Services Co310 East Foothill Blvd.Ste.200Arcadia, CA 91006-


17-A0007-0237.1.117-A0007-0237.1.1

2Page:

Ordered By


ANALYTICAL RESULTS

Telephone: (626)441-7050

Method: 6010BSCAN, Title 22 Metals by ICP



Date Sampled 12/18/201712/18/201712/18/201712/18/2017

Dilution Factor 1 1 1 1 1Units ug/100cm2 ug/100cm2 ug/100cm2 ug/100cm2 ug/100cm2Matrix Solid Solid Solid Solid SolidDate Analyzed 01/09/2018 01/09/2018 01/09/2018 01/09/2018 01/09/2018

Date Prepared 01/08/2018 01/08/2018 01/08/2018 01/08/2018 01/08/2018

W01 W04W03W02Client Sample I.D.


Preparation Method 3050B 3050B 3050B 3050B 3050B


2.00Antimony 1.00 ND ND ND ND ND

2.00Arsenic 1.00 ND ND ND ND ND

1.20Barium 0.60 ND ND 1.10J 1.85 ND

0.40Beryllium 0.20 ND ND ND ND ND

0.40Cadmium 0.20 ND ND ND ND ND

0.40Chromium 0.20 ND ND 0.325J 0.499 ND

0.40Cobalt 0.20 ND ND ND ND ND

0.40Copper 0.20 ND 1.63 2.38 2.04 1.09

2.00Lead 1.00 ND ND ND ND ND

0.40Molybdenum 0.20 ND ND ND 0.227J ND

0.40Nickel 0.20 ND ND 0.279J 0.550 ND

2.00Selenium 1.00 ND ND ND ND ND

0.40Silver 0.20 ND ND ND ND ND

2.00Thallium 1.00 ND ND ND ND ND

1.20Vanadium 0.60 ND ND ND ND ND

0.40Zinc 0.20 ND 1.76 5.00 9.53 2.34


90688 12/27/2017 EXEENV




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Ordered By


ANALYTICAL RESULTS

Telephone: (626)441-7050




Date Sampled 12/18/201712/18/201712/18/2017

Dilution Factor 1 1 1Units ug/100cm2 ug/100cm2 ug/100cm2Matrix Solid Solid SolidDate Analyzed 01/09/2018 01/09/2018 01/09/2018

Date Prepared 01/08/2018 01/08/2018 01/08/2018

W05 W06 W07Client Sample I.D.

Analytes MDL Results Results ResultsPQL

Preparation Method 3050B 3050B 3050B

Our Lab I.D. 90688.0790688.0690688.05

2.00Antimony 1.00 ND ND ND

2.00Arsenic 1.00 ND ND ND

1.20Barium 0.60 ND 1.27 3.23

0.40Beryllium 0.20 ND ND ND

0.40Cadmium 0.20 ND ND ND

0.40Chromium 0.20 ND ND 0.318J

0.40Cobalt 0.20 ND ND ND

0.40Copper 0.20 1.00 0.240J 0.760

2.00Lead 1.00 ND ND ND

0.40Molybdenum 0.20 ND ND ND

0.40Nickel 0.20 ND 0.277J 0.593

2.00Selenium 1.00 ND ND ND

0.40Silver 0.20 ND ND ND

2.00Thallium 1.00 ND ND ND

1.20Vanadium 0.60 ND ND ND

0.40Zinc 0.20 4.27 3.55 9.53


90688 12/27/2017 EXEENV




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Ordered By


ANALYTICAL RESULTS

Telephone: (626)441-7050




Date Sampled 12/18/201712/18/201712/18/201712/18/2017

Dilution Factor 1 1 1 1 1Units ug/100cm2 ug/100cm2 ug/100cm2 ug/100cm2 ug/100cm2Matrix Solid Solid Solid Solid SolidDate Analyzed 01/09/2018 01/09/2018 01/09/2018 01/09/2018 01/09/2018

Date Prepared 01/08/2018 01/08/2018 01/08/2018 01/08/2018 01/08/2018

W08 W11W10W09Client Sample I.D.


Preparation Method 3050B 3050B 3050B 3050B 3050B


2.00Antimony 1.00 ND ND ND ND ND

2.00Arsenic 1.00 ND ND ND ND ND

1.20Barium 0.60 ND ND ND ND 0.674J

0.40Beryllium 0.20 ND ND ND ND ND

0.40Cadmium 0.20 ND ND ND ND ND

0.40Chromium 0.20 ND ND ND 0.227J ND

0.40Cobalt 0.20 ND ND ND ND ND

0.40Copper 0.20 ND 2.55 1.28 0.250J 0.320J

2.00Lead 1.00 ND ND ND ND ND

0.40Molybdenum 0.20 ND ND 0.206J ND ND

0.40Nickel 0.20 ND ND ND 0.204J ND

2.00Selenium 1.00 ND ND ND ND ND

0.40Silver 0.20 ND ND ND ND ND

2.00Thallium 1.00 ND ND ND ND ND

1.20Vanadium 0.60 ND ND ND ND ND

0.40Zinc 0.20 ND 2.18 1.89 1.90 2.58


90688 12/27/2017 EXEENV




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Ordered By


ANALYTICAL RESULTS

Telephone: (626)441-7050




Date Sampled 12/18/201712/18/201712/18/2017

Dilution Factor 1 1 1Units ug/100cm2 ug/100cm2 ug/100cm2Matrix Solid Solid SolidDate Analyzed 01/09/2018 01/09/2018 01/09/2018

Date Prepared 01/08/2018 01/08/2018 01/08/2018

W12 W13 W14Client Sample I.D.

Analytes MDL Results Results ResultsPQL

Preparation Method 3050B 3050B 3050B

Our Lab I.D. 90688.1490688.1390688.12

2.00Antimony 1.00 ND ND ND

2.00Arsenic 1.00 ND ND ND

1.20Barium 0.60 4.46 ND ND

0.40Beryllium 0.20 ND ND ND

0.40Cadmium 0.20 ND ND ND

0.40Chromium 0.20 ND ND ND

0.40Cobalt 0.20 ND ND ND

0.40Copper 0.20 ND ND ND

2.00Lead 1.00 ND ND ND

0.40Molybdenum 0.20 0.219J ND ND

0.40Nickel 0.20 ND ND ND

2.00Selenium 1.00 ND ND ND

0.40Silver 0.20 ND ND ND

2.00Thallium 1.00 ND ND ND

1.20Vanadium 0.60 ND ND ND

0.40Zinc 0.20 1.98 ND ND

90688 12/27/2017 EXEENV




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Ordered By

Attn: Daniel H GinsborgTelephone: (626)441-7050







QC Batch No: 0108182C6; LCS: Blank; LCS Prepared: 01/08/2018; LCS Analyzed: 01/09/2018; Units: ug/100cm2

Antimony <15 50.0 53.0 106 50.0 52.5 105 <1 75-125

Arsenic <15 50.0 53.5 107 50.0 53.0 106 <1 75-125

Barium <15 50.0 53.5 107 50.0 53.0 106 <1 75-125

Beryllium <15 50.0 52.0 104 50.0 52.5 105 <1 75-125

Cadmium <15 50.0 53.0 106 50.0 52.5 105 <1 75-125

Chromium <15 50.0 54.5 109 50.0 54.0 108 <1 75-125

Cobalt <15 50.0 53.0 106 50.0 52.5 105 <1 75-125

Copper <15 50.0 53.5 107 50.0 52.5 105 1.9 75-125

Lead <15 50.0 51.5 103 50.0 52.0 104 <1 75-125

Molybdenum <15 50.0 52.0 104 50.0 52.0 104 <1 75-125

Nickel <15 50.0 51.5 103 50.0 51.0 102 <1 75-125

Selenium <15 50.0 53.0 106 50.0 53.5 107 <1 75-125

Silver <15 50.0 53.5 107 50.0 53.0 106 <1 75-125

Thallium <15 50.0 53.0 106 50.0 53.0 106 <1 75-125

Vanadium <15 50.0 53.0 106 50.0 52.5 105 <1 75-125

Zinc <15 50.0 53.0 106 50.0 53.0 106 <1 75-125

90688 12/27/2017 EXEENV




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Ordered By

Attn: Daniel H GinsborgTelephone: (626)441-7050







QC Batch No: 0108182C7; LCS: Blank; LCS Prepared: 01/08/2018; LCS Analyzed: 01/09/2018; Units: ug/100cm2

Antimony <15 50.0 52.5 105 50.0 53.0 106 <1 75-125

Arsenic <15 50.0 53.0 106 50.0 52.5 105 <1 75-125

Barium <15 50.0 53.5 107 50.0 53.5 107 <1 75-125

Beryllium <15 50.0 53.0 106 50.0 52.5 105 <1 75-125

Cadmium <15 50.0 53.0 106 50.0 53.5 107 <1 75-125

Chromium <15 50.0 54.5 109 50.0 54.0 108 <1 75-125

Cobalt <15 50.0 53.5 107 50.0 53.5 107 <1 75-125

Copper <15 50.0 53.5 107 50.0 54.0 108 <1 75-125

Lead <15 50.0 52.0 104 50.0 52.0 104 <1 75-125

Molybdenum <15 50.0 52.0 104 50.0 52.0 104 <1 75-125

Nickel <15 50.0 51.5 103 50.0 52.0 104 <1 75-125

Selenium <15 50.0 53.0 106 50.0 53.5 107 <1 75-125

Silver <15 50.0 54.0 108 50.0 54.0 108 <1 75-125

Thallium <15 50.0 53.5 107 50.0 53.0 106 <1 75-125

Vanadium <15 50.0 53.0 106 50.0 53.0 106 <1 75-125

Zinc <15 50.0 56.0 112 50.0 54.5 109 2.7 75-125

Mr. Daniel Ginsborg December 29, 2017Executive Environmental310 East Foothill Blvd.Suite 200Arcadia, CA 91006

DOH ELAP #11626 Account# 13730 Login# L429349AIHA-LAP #100324

Dear Mr. Ginsborg:

Enclosed are the revised analytical results for the samples received by our laboratory on December 21, 2017;all air volumes have been updated per the chain of custody. Please note that this revision cancels and supersedes L429349 (report reference:1) dated 12/29/17 issued by SGS Galson. All test results meet the quality control requirements of AIHA-LAP and NELAC unless otherwise stated in this report. All samples on the chain of custody were received in good condition unless otherwise noted.

Results in this report are based on the sampling data provided by the client and refer only to the samples as they were received at the laboratory. When possible, non-IOM samples will be retained for 14 days following the date of this report (unless an extension is specifically requested). IOM samples are retained for 7 days.

Current Scopes of Accreditation can be viewed at www.sgsgalson.com in the accreditations section of the "About" page.

Please contact Pamela Weaver at (888) 432-5227, if you would like any additional information regarding this report. Thank you for using SGS Galson Laboratories.

Sincerely,

SGS Galson Laboratories

[qcsig]

Lisa SwabLaboratory Director

Enclosure(s)

Galson Laboratories, Inc. is now a part of SGS, the world's leading inspection, verification, testing, and certification company. As part of our transition to SGS, you will begin to see some formatting changes with reports that will improve the presentation of data and allow for the transition to the new logo.

Page 1 of 16 Report Reference:2 Generated:29-DEC-17 12:50

LABORATORY ANALYSIS REPORT

Client : Executive Environmental Account No.: 13730 6601 Kirkville Road Site : NS Login No. : L429349 East Syracuse, NY 13057 Project No. : 16-A0007-0237.1.1 (315) 432-5227 Date Sampled : 18-DEC-17 Date Analyzed : 27-DEC-17 FAX: (315) 437-0571 Date Received : 21-DEC-17 Report ID : 1040111 www.galsonlabs.com

Client ID : 171218-0237.1.1-DM01 Lab ID : L429349-1 Air Volume : 14688 LDate Sampled : 12/18/17 Date Analyzed : 12/27/17

LOQ Total Conc Units Parameter ug ug

Antimony 0.90 <0.90 <0.000061 mg/m3 Arsenic 0.30 <0.30 <0.000020 mg/m3 Barium 0.15 1.5 0.000099 mg/m3 Beryllium 0.15 <0.15 <0.000010 mg/m3 Cadmium 0.15 <0.15 <0.000010 mg/m3 Chromium 7.5 <7.5 <0.00051 mg/m3 Cobalt 0.45 <0.45 <0.000031 mg/m3 Copper 0.30 0.82 0.000056 mg/m3 Lead 0.38 <0.38 <0.000026 mg/m3 Molybdenum 0.15 <0.15 <0.000010 mg/m3 Nickel 0.30 <0.30 <0.000020 mg/m3 Selenium 2.3 <2.3 <0.00015 mg/m3 Thallium 1.5 <1.5 <0.00010 mg/m3 Vanadium 0.45 <0.45 <0.000031 mg/m3 Zinc 2.3 <2.3 <0.00015 mg/m3

COMMENTS: Please see attached lab footnote report for any applicable footnotes.

Collection Media: PVC PW 37mm Submitted by: JMR Approved by: JJL/KEG Date : 29-DEC-17 NYS DOH # : 11626 Supervisor: KEG QC by: KSB

< -Less Than mg -Milligrams m3 -Cubic Meters kg -Kilograms NA -Not Applicable ND -Not Detected > -Greater Than ug -Micrograms l -Liters NS -Not Specified ppm -Parts per Million LOQ-Limit of Quantitation






Antimony 0.90 <0.90 <0.000061 mg/m3 Arsenic 0.30 <0.30 <0.000020 mg/m3 Barium 0.15 0.29 0.000020 mg/m3 Beryllium 0.15 <0.15 <0.000010 mg/m3 Cadmium 0.15 <0.15 <0.000010 mg/m3 Chromium 7.5 <7.5 <0.00051 mg/m3 Cobalt 0.45 <0.45 <0.000031 mg/m3 Copper 0.30 <0.30 <0.000020 mg/m3 Lead 0.38 <0.38 <0.000026 mg/m3 Molybdenum 0.15 <0.15 <0.000010 mg/m3 Nickel 0.30 <0.30 <0.000020 mg/m3 Selenium 2.3 <2.3 <0.00015 mg/m3 Thallium 1.5 <1.5 <0.00010 mg/m3 Vanadium 0.45 <0.45 <0.000031 mg/m3 Zinc 2.3 <2.3 <0.00015 mg/m3









Antimony 0.90 <0.90 <0.000061 mg/m3 Arsenic 0.30 <0.30 <0.000020 mg/m3 Barium 0.15 <0.15 <0.000010 mg/m3 Beryllium 0.15 <0.15 <0.000010 mg/m3 Cadmium 0.15 <0.15 <0.000010 mg/m3 Chromium 7.5 <7.5 <0.00051 mg/m3 Cobalt 0.45 <0.45 <0.000031 mg/m3 Copper 0.30 <0.30 <0.000020 mg/m3 Lead 0.38 <0.38 <0.000026 mg/m3 Molybdenum 0.15 <0.15 <0.000010 mg/m3 Nickel 0.30 <0.30 <0.000020 mg/m3 Selenium 2.3 <2.3 <0.00015 mg/m3 Thallium 1.5 <1.5 <0.00010 mg/m3 Vanadium 0.45 <0.45 <0.000031 mg/m3 Zinc 2.3 <2.3 <0.00015 mg/m3









Antimony 0.90 <0.90 <0.000061 mg/m3 Arsenic 0.30 <0.30 <0.000020 mg/m3 Barium 0.15 1.6 0.00011 mg/m3 Beryllium 0.15 <0.15 <0.000010 mg/m3 Cadmium 0.15 <0.15 <0.000010 mg/m3 Chromium 7.5 <7.5 <0.00051 mg/m3 Cobalt 0.45 <0.45 <0.000031 mg/m3 Copper 0.30 0.92 0.000063 mg/m3 Lead 0.38 <0.38 <0.000026 mg/m3 Molybdenum 0.15 <0.15 <0.000010 mg/m3 Nickel 0.30 <0.30 <0.000020 mg/m3 Selenium 2.3 <2.3 <0.00015 mg/m3 Thallium 1.5 <1.5 <0.00010 mg/m3 Vanadium 0.45 <0.45 <0.000031 mg/m3 Zinc 2.3 <2.3 <0.00015 mg/m3







Client ID : 171218-0237.1.1-DM08 Lab ID : L429349-8 Air Volume : NADate Sampled : 12/18/17 Date Analyzed : 12/27/17


Antimony 0.90 <0.90 NA mg/m3 Arsenic 0.30 <0.30 NA mg/m3 Barium 0.15 <0.15 NA mg/m3 Beryllium 0.15 <0.15 NA mg/m3 Cadmium 0.15 <0.15 NA mg/m3 Chromium 7.5 <7.5 NA mg/m3 Cobalt 0.45 <0.45 NA mg/m3 Copper 0.30 <0.30 NA mg/m3 Lead 0.38 <0.38 NA mg/m3 Molybdenum 0.15 <0.15 NA mg/m3 Nickel 0.30 <0.30 NA mg/m3 Selenium 2.3 <2.3 NA mg/m3 Thallium 1.5 <1.5 NA mg/m3 Vanadium 0.45 <0.45 NA mg/m3 Zinc 2.3 <2.3 NA mg/m3







Total Dust

Air Vol Total Conc Sample ID Lab ID liter mg mg/m3

171218-0237.1.1-DM01 L429349-1 14688 0.52 0.035 171218-0237.1.1-DM02 L429349-2 14688 0.12 0.0082 171218-0237.1.1-DM03 L429349-3 14688 0.076 0.0052 171218-0237.1.1-DM04 L429349-4 14688 0.65 0.044 171218-0237.1.1-DM05 L429349-5 14688 0.11 0.0073 171218-0237.1.1-DM06 L429349-6 14688 0.14 0.0096 171218-0237.1.1-DM07 L429349-7 14688 0.15 0.010 171218-0237.1.1-DM08 L429349-8 NA <0.050 NA 171218-0237.1.1-DM09 L429349-9 NA <0.050 NA 171218-0237.1.1-DM10 L429349-10 NA <0.050 NA


Level of quantitation: 0.050 mg Submitted by: PAH Analytical Method : mod. NIOSH 0500; Gravimetric Approved by : SPR OSHA PEL : PNOR 15 mg/m3 (TWA) Date : 29-DEC-17 NYS DOH # : 11626 Collection Media : PVC PW 37mm Supervisor: KRK QC by: KSB

< -Less Than mg -Milligrams m3 -Cubic Meters kg -Kilograms NA -Not Applicable ND -Not Detected > -Greater Than ug -Micrograms l -Liters NS -Not Specified ppm -Parts per Million


LABORATORY FOOTNOTE REPORT

Client Name : Executive Environmental Site : Project No. : 16-A0007-0237.1.1

6601 Kirkville Road East Syracuse, NY 13057 Date Sampled : 18-DEC-17 Account No.: 13730 (315) 432-5227 Date Received: 21-DEC-17 Login No. : L429349 FAX: (315) 437-0571 Date Analyzed: 26-DEC-17 - 27-DEC-17 www.galsonlabs.com

This document is issued by the Company under its General Conditions of Service accessible at http://www.sgs.com/en/Terms-and-Conditions.aspx. Attention is drawn to the limitation of liability, indemnification and jurisdiction issues defined therein.

Any holder of this document is advised that information contained herein reflects the Company’s findings at the time of its intervention only and within the limits of Client’s instructions, if any. The Company’s sole responsibility is to its Client and this document does not exonerate parties to a transaction from exercising all their rights and obligations under the transaction documents. Any unauthorized alteration, forgery or falsification of the content or appearance of this document is unlawful and offenders may be prosecuted to the fullest extent of the law.

Unless otherwise noted below, all quality control results associated with the samples were within established control limits or did not impact reported results.

Note: The findings recorded within this report were drawn from analysis of the sample(s) provided to the laboratory by the Client (or a third party acting at the Client’s direction). The laboratory does not have control over the sampling process. The findings herein constitute no warranty of the samples’ representativeness of any sampled environment and strictly relate to the samples as they were presented to the laboratory.

Unrounded results are carried through the calculations that yield the final result and the final result is rounded to the number of significant figures appropriate to the accuracy of the analytical method. Please note that results appearing in the columns preceeding the final result column may have been rounded and therefore, if carried through the calculations, may not yield an identical final result to the one reported.

The stated LOQs for each analyte represent the demonstrated LOQ concentrations prior to correction for desorption efficiency (if applicable).

Unless otherwise noted below, reported results have not been blank corrected for any field blank or method blank.

L429349 (Report ID: 1040111): Reported results reflect elemental analysis of the requested metals. Certaincompounds may not be solubilized during digestion, resulting in data that isbiased low.SOPs: MT-SOP-9(35), im-mwvfilt(29)OSHA PEL: Chromium II and III = 0.5 mg/m3; Chromium metal (as Cr) = 1 mg/m3OSHA PEL: Copper dust and mist = 1 mg/m3; Copper fume = 0.1 mg/m3OSHA PEL: Molybdenum soluble compounds, as Mo = 5 mg/m3; Molybdenum and insolublecompounds, as Mo (total dust) = 15 mg/m3.

< -Less Than mg -Milligrams m3 -Cubic Meters kg -Kilograms ppm -Parts per Million > -Greater Than ug -Micrograms l -Liters NS -Not Specified ND -Not Detected NA -Not Applicable





L429349 (Report ID: 1040111):Accuracy and mean recovery data presented below is based on a 95% confidence interval (k=2). The estimated accuracy applies to the media, technology, and SOP referenced in this report and does not account for the uncertainty associated with the sampling process. The accuracy is based solely on spike recovery data from internal quality control samples. Where N/A appears below, insufficient data is available to provide statistical accuracy and mean recovery values for the associated analyte.

Parameter Accuracy Mean Recovery

Antimony +/-10.4% 96.9% Arsenic +/-8.4% 103% Barium +/-7.3% 100% Beryllium +/-12.8% 103% Cadmium +/-8.5% 101% Chromium +/-12.5% 103% Cobalt +/-8.6% 102% Copper +/-10.5% 103% Lead +/-9.4% 99.7% Molybdenum +/-8.5% 100% Nickel +/-8.8% 100% Selenium +/-10.5% 104% Thallium +/-8.1% 98.9% Vanadium +/-7.8% 99.3% Zinc +/-8.8% 100%

Parameter Method PEL

Antimony mod. NIOSH 7300/mod. OSHA ID-125G; ICP/I 0.5 mg/m3 (TWA)Arsenic mod. NIOSH 7300/mod. OSHA ID-125G; ICP/I 0.01 mg/m3 (TWA)Barium mod. NIOSH 7300/mod. OSHA ID-125G; ICP/I 0.5 mg/m3 (Soluble) (TWA)Beryllium mod. NIOSH 7300/mod. OSHA ID-125G; ICP/I 0.0002 mg/m3 (TWA)Cadmium mod. NIOSH 7300/mod. OSHA ID-125G; ICP/I 0.005 mg/m3 (TWA)Chromium mod. NIOSH 7300/mod. OSHA ID-125G; ICP/I Varies, see footnoteCobalt mod. NIOSH 7300/mod. OSHA ID-125G; ICP/I 0.1 mg/m3 (TWA)Copper mod. NIOSH 7300/mod. OSHA ID-125G; ICP/I Varies, see footnote






L429349 (Report ID: 1040111):

Parameter Method PEL

Lead mod. NIOSH 7300/mod. OSHA ID-125G; ICP/I 0.05 mg/m3 (TWA)Molybdenum mod. NIOSH 7300/mod. OSHA ID-125G; ICP/I Varies, see footnoteNickel mod. NIOSH 7300/mod. OSHA ID-125G; ICP/I 1 mg/m3 (TWA)Selenium mod. NIOSH 7300/mod. OSHA ID-125G; ICP/I 0.2 mg/m3 (TWA)Thallium mod. NIOSH 7300/mod. OSHA ID-125G; ICP/I 0.1 mg/m3 (Soluble) (TWA)Vanadium mod. NIOSH 7300/mod. OSHA ID-125G; ICP/I NAZinc mod. NIOSH 7300/mod. OSHA ID-125G; ICP/I NA

L429349 (Report ID: 1039167): SOPs: GRAV-SOP-5(18), GRAV-SOP-6(17)Gravimetric analytical accuracy of the sampling media is 0.002 +/- 0.018 mg (average blankweight change +/- 95% confidence interval or k=2). The estimated uncertainty applies to the media, technology, andSOP(s) referenced in this report and does not account for any uncertainty associated with the sampling process.PNOR = Particulates Not Otherwise Regulated.



of 16 Report Reference:2 Generated:29-DEC-17 12:50

july 31, 2018 - edl...2018/08/07 · executive environmental paramount unified school district...

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