2022-03-24; Water Quality at Hope Elementary School Update Report (District 2); Gomez, Paz

To the mempers of the:

CITY COUNCIL
Date 3 /2>+ /:acA ..::L cc L
CM_::f..ACM ,_{_ DCM (3) .:L_
March 24, 2022
CMWD Board Memorandum
To: Carlsbad Municipal Water of Directors
From: Paz Gomez, Deputy City Works
Vicki Quiram, General Manager.

Via: Scott Chadwick, Executive Man ge
Re: Water Quality at Hope Elemen
Ccarlsbad
Municipal Water District
Memo ID #2022034
This memorandum provides follow-up information to the previous memorandum submitted to the Carlsbad Municipal Water District Board of Directors dated March 3, 2022, as shown in Attachment A, related to the Feb. 24, 2022, response to Hope Elementary School after a Carlsbad Unified School District, or CUSD, contractor, Erickson-Hall Construction Company, or Erickson Hall, reported a water quality issue at Hope Elementary School.

Background
On Thursday, Feb. 24, 2022, Carlsbad Municipal Water District, or CMWD, staff received a call from the Project Manager for Erickson-Hall Construction Company, the CUSD's contractor, requesting assistance with a water quality issue at Hope Elementary School. The Erickson-Hall Project Manager indicated that recent samples that were taken at Hope Elementary School showed higher levels of copper than would normally be found in potable water. CMWD staff immediately responded to Hope Elementary School and began investigating the situation.

Discussion
Since the last memorandum to the Board, Attachment A, CMWD staff completed the investigation and submitted an Incident Report to the State Water Resources Control Board, or the State Water Board, on March 16, 2022, Attachment B. While the prior memorandum stated a final report due date of March 4, 2022, the State Water Board granted the CMWD an extension to March 16, 2022, and the Incident Report was submitted in a timely manner by the March 16, 2022, deadline.

This Incident Report explains each step that was taken to correct the immediate water quality - situation at Hope Elementary School, remove the public supply of recycled water from the site, restore the public potable water supply, and allow Hope Elementary School to resume operation on Monday, Feb. 28, 2022. It also includes a description of the cross-connection that CMWD staff found behind a relocatable classroom on the west side of the campus, where Erickson-Hall is under active construction. The report also notes that the CUSD continued construction work after the city issued a Stop Work Order to the CUSD on July 30, 2020.

The CMWD's recycled water rules and regulations require that if any changes are made to a recycled water irrigation system on private property, the owner making changes must submit an Carlsbad Municipal Water District
5950 El Camino Real I Carlsbad, CA 92008 I 442-339-2722 t Board Memo - Water Quality at Hope Elementary School Update Report (District 2) March 24, 2022

Page 2 ends

Irrigation Plan for review and approval by the CMWD and the San Diego County Department of Environmental Health and Quality, or DEHQ. Neither the CUSD nor Erickson-Hall had submitted any plans to the CMWD or the County DEHQ for any work performed on Hope Elementary School's recycled water system. Despite this requirement, recycled lines were moved during construction. Recently, after the incident occurred, the CUSD contractor provided a Utilities Plan to the CMWD that had been approved by the California Division of the State Architect. The west area of the construction site, which is where the cross-connection occurred, was not included on the plans and no changes to the recycled water system were shown.

During the CMWD's investigation of this matter, staff discovered that Hope Elementary School had been receiving comments about potable water quality on campus since August 2021.

Although staff does not know the exact date when the cross-connection occurred, it appears that it happened around August 2021.

The recycled water system at Hope Elementary School continues to be disconnected. The CUSD contractor continues to work through the process that the CMWD and the DEHQ will require before Hope Elementary School will be allowed to reconnect to the recycled water system for irrigation.

Next Steps
The CMWD will continue to work with the State Water Board and the DEHQ to reinforce the CMWD's authority over recycled water regulations at school sites. In addition, CMWD staff will work with the CUSD and the DEHQ to schedule cross-connection testing of the other Carlsbad schools that have recycled water and projects under construction. This will determine whether any changes have been made to those water systems and whether the potable and recycled water being served at those other schools meet all applicable regulatory standards.

Attachments: A. CMWD Board Memorandum dated March 3, 2022 B. Incident Report submitted on March 16, 2022 (Due to the size of Attachment B, a hardcopy is on file in the Office of the City Council, as reference) cc: Geoff Patnoe, Assistant Executive Manager
Celia Brewer, General Counsel
Gary Barberio, Deputy City Manager, Community Services
Laura Rocha, Deputy City Manager, Administrative Services Robby Contreras, Assistant General Counsel
Jeff Murphy, Community Development Director
Kristina Ray, Communication & Engagement Director
Dave Padilla, District Engineer
Babaq Taj, Engineering Manager
Jason Geldert, Engineering Manager
Eric Sanders, Utilities Manager
Tim Carroll, Senior Engineer
Andrew Wilson, Utilities Supervisor
To the members of the:

Cl COUNCIL
Date �CA V CC _ll'.'.:.

CM_ACM V DCM (3).lL,
CMWD Board Memorandum
March 3, 2022
To: Carlsbad Municipal Water istri t Board of Directors From: Paz Gomez, Deputy City Man Public Works
Vicki Quiram, General Man ger
Via: Scott Chadwick, Executive an
Ccarlsbad
Municipal Water District
Memo ID #2022027
Re: Cross-Connection/Water Quality Issue at Hope Elementary School (District 2) This memorandum provides information related to the Feb. 24, 2022, discovery of a cross connection between the recycled and potable water lines at Hope Elementary School, located at 3010 Tamarack Avenue. A cross-connection is a point in a water system where the potable, or drinking, water supply is connected to a non-potable source, in this case recycled water. The cross-connection involved Carlsbad Unified School District, or CUSD, owned pipes only and appears to be associated with the CUSD's ongoing construction project at the school.

Background
On Thursday, Feb. 24, 2022, the CMWD received a call from the Project Manager for Erickson Hall Construction Company, CUSD's contractor, requesting assistance with a water quality issue at Hope Elementary School. Erickson-Hall indicated that recent samples t.hat were taken at the school showed higher levels of copper than would normally be found in potable water. CMWD staff immediately responded to the school and began investigating.

Discussion
Upon arrival at Hope Elementary School on Feb. 24, 2022, CMWD staff took a water quality sample in one of the classrooms and found the TDS1 results of the water to be 740 milligrams per liter (mg/I), which confirmed that the water coming into the school's potable water system likely included recycled water.

CMWD staff immediately shut-off the CMWD potable water supply to the campus. Once the potable water was shut-off, water was still reaching the classrooms throughout the school property. This further confirmed that the recycled water lines had been inappropriately connected to the potable water system within the school campus. The campus is under active construction.

CMWD staff notified the school principal that all water supply to the campus would be shut-off immediately. Without water service on campus, the school sent home students and staff. CMWD 1 "TDS" in this context means "total dissolved solids"
Carlsbad Municipal Water District
5950 El Camino Real I Carlsbad, CA 92008 I 442-339-2722 t

ATTACHMENT A
TY
:fei-_
Board Memo - Cross-Connection/Water Quality Issue at Hope Elementary School (District 2) March 3, 2022

Page 2 ends

staff notified the County Department of Environmental Health and Quality, or DEHQ, and the State Water Resources Control Board of the cross-connection and began to work with staff from these two agencies to ensure that all needed steps were taken and regulations met.

During the investigation of the school site and its water pipes on Feb. 24, 2022, CMWD staff found newly constructed PVC pipes with a recycled water pipe connected to the CUSD 1 s potable
water line behind one of the classrooms located at the back corner of the school property.

CMWD staff eliminated the cross-connection by disconnecting the recycled water line from the potable water system. Staff also removed the school
1 s recycled water meter.

After the school was vacated, CMWD staff began introducing chlorine into the distribution system to disinfect the potable water lines. This process involves injecting chlorine, or flushing, and follows a nationally recognized standard for disinfecting potable water mains. CMWD staff performed this process from Friday to Saturday, Feb. 25-26, 2022. CMWD staff took two sets of samples and sent them to a laboratory for testing ..

Both sets of samples showed that the potable water met water quality standards. CMWD staff then contacted the State Water Board and notified the CUSD that the school could reopen. The CUSD sent notification to the families of the students stating that the potable water meets all standards and the school would reopen on Monday, Feb. 28, 2022.

Recycled water is not connected at the school site at this time. Prior to reinstallation of the recycled water meter and restoration of recycled water service to the school site, the CMWD will require the CUSD to submit a recycled water use site plan that must receive approval from the CMWD, the DEHQ and the State Water Board.

While CMWD staff do not know how long the recycled water was in the potable water system at the school, CUSD staff told CMWD staff that there had previously been multiple complaints from food services, teachers and students starting in approximately August 2021. The CUSD also told the CMWD that its construction contractor sampled the water on the following dates:

April 2, 2021, Aug. 11, 2021, Nov. 10, 2021, Jan. 11, 2022, and Feb. 23, 2022. The contractor tested those samples for E.coli, which was not detected. The contractor continued to operate the system until Feb. 24, 2022, when the construction contractor contacted the CMWD.

Next Steps
CMWD staff will continue to address the issue by working with the CUSD and others and taking the following actions:

1. State Water Board Incident Report
CMWD staff must provide a final incident report to the State Water Board by March 16, 2022. The State Water Board may grant an extension, if necessary.

2. Communication
The CUSD published a "Hope Elementary School Water Issue Frequently Asked Questions
11 document dated Feb. 28, 2022, on its website, which is provided as Board Memo - Cross-Connection/Water Quality Issue at Hope Elementary School (District 2) March 3, 2022

Page 3 ends

Attachment A. This document answers questions and addresses concerns shared during calls to the CUSD from the school's families. CMWD staff are assisting with phone calls as needed.

Two TV news stations, channels 10 and 7, covered this issue after being notified by concerned parents.

The CMWD and other city departments including Construction Management & Inspection, Community Development, and Communication & Engagement worked together to answer the reporters' questions and explain the city's role. See attachment B for the information provided to the media.

3. CMWD Testing at Other CUSD Schools
CMWD staff will work with the CUSD and the DEHQ to schedule cross-connection testing at the other schools that have recycled water and projects under construction. This will determine whether any changes have been made to those water systems and whether the potable and recycled water being served at these other schools meet all applicable regulatory standards.

Attachments: A. Hope Elementary School Frequently Asked Questions dated Feb. 28, 2022 B. Media Response dated March 1, 2022
cc: Geoff Patnoe, Assistant Executive Manager
Celia Brewer, General Counsel
Laura Rocha, Deputy City Manager, Administrative Services Gary Barberio, Deputy City Manager, Community Services
Robby Contreras, Assistant General Counsel
Kristina Ray, Communication & Engagement Director
Jeff Murphy, Community Development Director
Dave Padilla, District Engineer
Babaq Taj, Engineering Manager
Jason Geldert, Engineering Manager
Eric Sanders, Utilities Manager
Tim Carroll, Senior Engineer
Andrew Wilson, Utilities Supervisor
Hope Elementary School Water Issue
Frequently Asked Questions
2/28/2022
Attachment A
On Thursday, February 24, the City of Carlsbad was notified following a suspicion that the domestic water lines at Hope Elementary were crossed with reclaimed water irrigation lines on campus. Due to this suspicion, all water was immediately shut off on campus, and students were sent home.

The District had been working with its contractors to investigate reported concerns with intermittent discoloration of the water at Hope Elementary. Water samples were taken throughout the campus and tested for safety. No pathogens (such as e.coli) were found in the samples, and the water was found to be within safe drinking standards. In an abundance of caution, we made bottled water available to students and staff while we looked further into the problem.

Additional testing conducted by the City confirmed the suspicion. The City of Carlsbad worked closely with the district to locate the problem and repair it immediately.

The City of Carlsbad gave the clearance to reopen on Monday, February 28, after treating the school's plumbing and conducting water quality tests, which were analyzed by a third-party laboratory for safety.

After the cross connection was removed, the City purged the plumbing system throughout the school with highly chlorinated water, and then allowed the chlorinated water to sit overnight. On Friday, City crews then flushed out the chlorinated water with potable water. The water tests were conducted after this process was completed. We are grateful for the City's assistance in helping us resolve this problem.

Additionally, we replaced all of the drinking water dispenser filters on campus.

Frequently Asked Questions
How did the cross connection occur?
We are still investigating how this occurred. It appears that this happened during the course of construction based on the timing of complaints and the location of the cross connection.

When did the complaints begin?
Shortly after the school reopened in the fall, there were sporadic reports of water discoloration in limited locations; the construction teams indicated that the issue was aesthetic and would resolve upon flushing the system.

We received additional complaints about intermittent problems with the water color, taste, and smell in November 2021. An investigation was conducted with testing results described below that did not indicate the water was unsafe.

Following additional complaints after winter break, more tests were performed and the District hired an independent consultant to look deeper into the cause of the recurring problem.

Carlsbad Unified School District, 2/28/2022 Page 1 of 3 How did the District respond?
The District notified its contractors of the problem and brought them onsite to diagnose the issue. Initially it was believed that the source was contamination that was introduced during construction or other disturbance in the infrastructure which would resolve with flushing the plumbing lines. The water testing described below was performed to rule out harmful bacteria, but testing was not ordered that would have detected the higher levels of chlorine, water hardness, and alkaline content that is found in reclaimed water.

The testing information we received concerning the safety of the water was shared with the principal, and she was relying on the same information provided to the District.

As complaints persisted, the contractors were brought out again and eventually the District hired an independent consultant to conduct additional testing to determine the problem.

Was the water tested?
Yes. Te
sting was performed by the plumbing contractor. The water was tested twice before the school reopened-once before opening the new kindergarten classroom that was being temporarily used as an administration office, and once before the entire school was reopened.

The water was tested for e.coli and other coliforms which would indicate harmful bacteria in the water.

Reclaimed water is disinfected, which is why the tests did not detect those substances.

Following school opening, tests were again conducted by the contractor while the problem was being investigated. Again, no e.coli or other coliforms were detected.

Following the test in January, the District hired an independent consultant to determine the cause of the ongoing complaints. The increased levels of chlorine, water hardness, and alkaline content indicated the cross connection.

Test results:

April 2,2021
August 13 2021
November 10
, 2021
January 11, 2022
February 24, 2022
Was the problem school wide or confined to specific locations? The plumbing system on the campus was being served by both potable water and water from the cross connection. The contaminated water mixed with the potable within the plumbing lines.

What contaminants might students have been exposed to?
Reclaimed water is highly treated and disinfected, but still contains higher levels of salts, dissolved minerals, nitrogen, and phosphorus than drinking water. The EPA has stringent guidelines to keep biological contaminants to a safe minimum.

Do students need to be tested by their doctor?
The State Water Resources Control Board advises parents to seek medical attention if your child exhibits symptoms of stomach or intestinal illness.

Carlsbad Unified School District, 2/28/2022 Page 2 of 3 What was done to restore drinking water to the school?
All water to the school was turned off while we located the cross connection on Thursday. February 24. Once the connection was found, it was removed and a new connection was made to the potable water.

City of Carlsbad crews then purged the plumbing system with heavily chlorinated water on Thursday night.

That water remained in the system overnight and was then flushed out on Friday. Following the flushing process, the City conducted its own water sampling on Friday (February 25) and Saturday (February 26). The County of San Diego reviewed the test results and gave clearance for the school to reopen on Monday (February 28).

Is this a problem at other schools that had recent construction? We have not had any reports, but will work with the City of Carlsbad to conduct cross connection testing at Kelly and Magnolia as a precaution.

Why didn't the District notify parents of the complaints? We are sincerely sorry that this was not reported earlier. We relied on the reports and information from our contractors, construction and bond program managers that the water had been tested for safety, that the issue was aesthetic, and would resolve. We did not anticipate the cause of the problem, and we regret that we did not discover the cause sooner. Once we were alerted to the cause, we took all the steps necessary to prevent further exposure; to inform our community; and to resolve the problem.

Carlsbad Unified School District, 2/28/2022 Page 3 of3
Wednesday, March 2, 2022 at 12:03:22 Pacific Standard Time Subject: Re: Hope Elementary Water Incident ATTACHMENT B Date:

From:

To:

CC:

Tuesday, March 1, 2022 at 12:24:01 PM Pacific Standard Time Kristina Ray
Feather, William (NBCUniversal), Vicki Quiram
@NBC Uni KNSD Assignment Desk, [email protected]
Attachments: image001.png, image002.png
Here you go. Please let me know if you have any other questions of the city or the water district. I've copied Rick Grove with the school district, who is their point of contact if you have questions for them.

We were provided with an FAQ that was sent to parents and was also posted to the Carlsbad Unified district website.

What was the city's involvement in the matter?
The Carlsbad Unified School District's construction contractor contacted the Carlsbad Municipal Water District last Thursday, Feb. 24, to ask for help identifying the cause of water quality concerns at Hope Elementary.

We sent staff to the school right away and confirmed that a school recycled water pipe had been connected to one if its regular water pipes.

We notified the State Water Resources Control Board and the County of San Diego Department of Environmental Health and Quality, which is the protocol when a "cross-connection" has been identified.

Water district staff has worked with the school district and its contractor to locate the affected pipes and oversee the disconnection of the recycled water cross connection. Once that was done, water district staff followed the state's protocol for flushing and disinfecting the campus water system, which included additional testing.

What was the timeline the school/district provided to the city regarding the issue? Once we were notified Feb. 24, district staff told us concerns had come up with the school's water quality since last fall, and that repeated testing conducted by the school district's contractors had not found harmful bacteria in the water.

The FAQ Sheet outlines that the district notified its contractors of the problem and brought them onsite to "diagnose the issue" and that water testing was performed, but "testing was not ordered that would have detected the higher levels of chlorine, water hardness, and alkaline content that is found in reclaimed water."
Was the city involved in this testing?
No, not until Feb. 24.

Is the city aware of why testing was not ordered that would have detected levels of chemicals and contaminants found in reclaimed water, especially if it was known that is what the issue was? No.

Additional Questions:

If construction was being done, why wasn't this cross-connection issue identified or addressed during an inspection with a City of Carlsbad inspector?

Page 1 of 3 ends

The school district didn't submit plans to work on its recycled water system. That is what would have triggered an inspection by the city.

If you have a statement you are able to share regarding the incident, that would also be greatly appreciated.

The Carlsbad Municipal Water District is working with the school district and its contractors to help prevent cross-connections during construction projects moving forward.

From: Feather, William (NBCUniversal) <[email protected]> Date: Monday, February 28, 2022 at 8:19 PM
To: Kristina Ray <[email protected]>, Vicki Quiram <[email protected]> Cc: @NBC Uni KNSD Assignment Desk <[email protected]> Subject: Hope Elementary Water Incident
Hi Kristina and Vicki,
I am reaching out regarding an incident regarding water quality at Hope Elementary School. We have been contacted by community members after the district notified families of ongoing water issues throughout this school year. My specific questions are in bullets and italicized below.

We were provided with an FAQ that was sent to parents and was also posted to the Carlsbad Unified district website.
• What was the city's involvement in the matter?
• What was the time line the school/district provided to the city regarding the issue? The FAQ Sheet outlines that the district notified its contractors of the problem and brought them onsite to "diagnose the issue" and that water testing was performed, but "testing was not ordered that would have detected the higher levels of chlorine, water hardness, and alkaline contentthat is found in reclaimed water." • Was the city involved in this testing?
• Is the city aware of why testing was not ordered that would have detected levels of chemicals and contaminants found in reclaimed water, especially if it was known that is what the issue was? Additional Questions:
• If construction was being done, why was this cross-connection issue identified or addressed during an inspection with a City of Carlsbad inspector?
If you have a statement you are able to share regarding the incident, that would also be greatly appreciated.

We are on a deadline of no later than 12p.m. tomorrow March 1, 2022.

Page 2 of 3 ends

Thanks,
NBC7.com I Telemundo20.com
.NBCUniversal Local

BILL FEATHER
Assignment Editor, KNSD I KUAN
0: 619.578.0204 I M: 619.204.2467
9680 Granite Ridge Drive
San Diego, CA 92123
CAUTION: Do not o en attachments or click on links unless ou reco nize the sender and know the content is safe.

Page 3 of 3 ends

March 16, 2022
Sean Sterchi, PE
San Diego District Engineer
State Water Resources Control Board
Division of Drinking Water
P.O. Box 100
Sacramento, CA 95812-0100-
Dear Mr. Sterchi
Ccarlsbad
Municipal Water District
EMAIL: [email protected]
The Carlsbad Municipal Water District is pleased to submit the attached Recycled Water Cross Connection Incident Report for Hope Elementary School, Carlsbad Unified School District dated March 15, 2022.

The attached report provides information related to a recycled water cross-connection discovered at Hope Elementary School located at 3010 Tamarack Avenue, Carlsbad, CA and the Carlsbad Municipal Water District's subsequent response.

Please feel free to contact me at [email protected] or call my direct line 442-339- 2307 or mobile 760-443-8879 if you have any questions.

Sincerely,
£�� f c.Cai/L�
Vicki V. Quiram
General Manager
Attachment: Recycled Water Cross-Connection Incident Report dated March 15, 2022 cc: Scott Chadwick, Executive Manager
Geoff Patnoe, Assistant Executive Manager
Celia Brewer, General Counsel
Paz Gomez, Deputy City Manager, Public Works
Carlsbad Municipal Water District
5950 El Camino Real I Carlsbad, CA 92008 I 442-339-2722 t

ATTACHMENT B

RECYCLED WATER

CROSS-CONNECTION

INCIDENT REPORT
FOR

HOPE ELEMENTARY SCHOOL,

CARLSBAD UNIFIED SCHOOL DISTRICT
March 15, 2022
Cearlsbad
Municipal Water District
Incident Report: Hope Elementary School, 3010 Tamarack Ave, Carlsbad, CA 92010 Mar. 15, 2022
TOC 1
Table of Contents

1.0 Introduction ................................................................................................................... 1

2.0 Cross-Connection Discovery ............................................................................................ 1

3.0 Enrollee’s Response to Cross-Connection (Chronologic Narrative of Actions) ................. 1

4.0 Hope School Recycled Water Use Site Certification/Site Utilities Plan ............................. 8

5.0 Recommended Actions ................................................................................................... 9 Attachments
A. Email f
rom Hope Elementary School Principal water complaint, dated February 8, 2022 B. Water quality test results requested by CUSD, Erickson-Hall Construction company C. DDW course of actions
D. Erickson-Hall drawing sheets
E. Potable Backflow prevention device test certification F. County of San Diego, DEHQ Recycled Water Test, dated February 24, 2022 G. School closure notification, dated February 25, 2022 H. Hope Elementary School map
I. E. coli sample results for February 25 and 26, 2022
J. Email notification from State DDW to reopen school, dated February 28, 2022 K. CUSD Notice to Re-open
L. CUSD FAQs February 28, 2022
M. Email from Erickson-Hall to CMWD, dated August 17, 2020 N. Email from CMWD recommending Highline, August 28, 2020 Page | 1 Incident Report – Hope Elementary School, 3010 Tamarack Ave, Carlsbad, CA 92010 Mar. 15, 2022

CROSS -CONNECTION

INCIDENT REPORT

1.0 Introduc
tion
This report provides information related to a recycled water cross-connection discovered at Hope Elementary School (Hope School), located at 3010 Tamarack Avenue, Carlsbad, CA and the Carlsbad Municipal Water District’s (CMWD) subsequent response.

2.0 Cr
oss
-Connection Discovery
On Thursday, February 24, 2022, at approximately 8:00 a.m., CMWD received a call from Tyler Ennis, Project Manager for Erickson-Hall, Carlsbad Unified School District’s (CUSD) construction contractor, requesting assistance with a water quality issue at Hope School. Mr. Ennis indicated that recent samples taken at the school showed higher levels of copper than would normally be found in potable water. CMWD immediately responded to the school and began an investigation.

At approximately 8:25 a.m., CMWD arrived on the school property. A chronology of the events that followed are summarized in the following section.

3.0 En
rol
lee’s Response to Cross-Connection (Chronologic Narrative of Actions) February 24, 2022 (unless otherwise noted)

3.1 Upon arrival at Hope School, CMWD staff met with Derrick Anderson, CUSD’s Construction Director, to discuss the reported water quality sampling done by Erickson-Hall that showed elevated levels of constituents. CMWD immediately took new baseline total dissolved solids (TDS) samples at the potable water backflow prevention device (result: 440 mg/l concentration) and the recycled irrigation system quick coupler (result: 900 mg/l concentration). Mr. Anderson then showed CMWD containers of water samples in Classroom 34 CUSD had previously collected at an unknown time. (Photos 1 and 2).

Page | 2 Incident Report – Hope Elementary School, 3010 Tamarack Ave, Carlsbad, CA 92010 Mar. 15, 2022

3.2 C
MWD tested a water sample from the classroom faucet. The water was discolored and odorous. CMWD’s test showed a TDS concentration of 740 mg/l, significantly higher than measured in the baseline potable water sample, which confirmed the school’s potable water system was likely contaminated with recycled water. CMWD shut off the potable water supply at the public meter, yet water was still reaching classrooms through the school’s private water system.

This further confirmed a cross-connection existed.

3.3 CMWD closed the public potable water supply connection at the CMWD meter and notified the San Diego County Department of Environmental Health and Quality (County DEHQ) and the State Water Resource Control Board, Division of Drinking Water (State DDW) of the CUSD plumbing system cross-connection.

CUSD closed the campus and students, teachers and other staff were sent home for the remainder of the day.

3.4 CMWD began investigating the private plumbing systems on the campus with the assistance of CUSD, Erickson-Hall, and its plumbing subcontractor. CMWD discovered a flexible hose connection at the back of Classroom 35 (Photo 3 below) which connected the irrigation line to the potable water line. Later in the day, as the investigation continued, CMWD requested that the CUSD plumbing subcontractor disconnect the hose (Photo 4 below).

Photo 2 - Water from Classroom 34 left out by school on counter at unknown time. Note green deposits in upper
right.

Photo 1 Water sample found from
Classroom 34 collected at unknown
time
Page | 3 Incident Report – Hope Elementary School, 3010 Tamarack Ave, Carlsbad, CA 92010 Mar. 15, 2022

3.5 Whi
le investigating the site, a plumbing subcontractor informed Eric Sanders, CMWD Utilities Manager, that the plumbing subcontractor had made the connection.

3.6 CMWD does not know the exact date the cross-connection occurred. However, CUSD indicated the construction contractor began painting the pipes in Photo 3 white around July 7, 2021 and the flexible hose was installed sometime after the painting.

3.7 Additionally, on February 25, 2022, Mr. Anderson told CMWD that food services staff, teachers and students began complaining about water quality in August 2021. Mr. Anderson sent an email to CMWD that includes a complaint of yellow water and residue from the principal, Ms. Rossiter. The same email chain also indicates that Erickson-Hall sampled and tested the water on April 21, 2021, August 13, 2021, September 10, 2021, and January 11, 2022 (Attachment A). - The test reports (Attachment B) provided by CUSD indicate the testing actually took place on March 31, 2021, August 11, 2021, November 9, 2021, and January 11, 2022. All four samples were tested for E. coli, which was not detected. The report from January 11, 2022 indicates that the sample was tested for other analytes normally present in recycled water and several were detected.

Photo 3 - Piping at Classroom 35 upon arrival. The
flexible plumbing pipe cross-connected potable and
recycled water systems.

Photo 4 – Piping at classroom 35 after cross-
connection removed later in the day.

Page | 4 Incident Report – Hope Elementary School, 3010 Tamarack Ave, Carlsbad, CA 92010 Mar. 15, 2022
The school continued to operate its private plumbing and irrigation systems until February 24, 2022, when CUSD contacted CMWD.

3.8 State DDW, County DEHQ and CMWD, with the cooperation of CUSD and its contractors, began working together to correct the situation. The State DDW prescribed a course of action (Attachment C), which CMWD and County DEHQ followed with cooperation from CUSD and Erickson-Hall.

3.9 CMWD reviewed the Recycled Water Use Site Plan approved for the school site when County DEHQ and CMWD approved the conversion of the school’s irrigation system to recycled water in 2017. Neither CUSD nor its construction contractor submitted plans to the City or County DEHQ for approval of modification of the school’s recycled water irrigation system as part of CUSD’s current construction activities.

3.10 On February 24, CMWD requested plans for the school’s plumbing system. On February 25, Mr. Ennis from Erickson-Hall provided five drawing sheets: A111- Overall Site Plan, A124-Enlarged Site Plan New Classroom Building, P101- Plumbing Site Plan, C005-Site Utilities Plan, C006-Site Utilities Plan, and C007- Site Utilities Plan (Attachment D), all approved in June 2020 by the Division of the State Architect for the new construction. None of the sheets show modifications to the school’s recycled water system. In addition, the back area of the school site where the cross-connection occurred is not depicted on the drawing sheets. While drawing sheet C005 shows a 2” irrigation line running under one of the new classroom buildings, Building H, CUSD did not provide plumbing plans for relocation of this irrigation line, which had been relocated.

3.11 CMWD performed an initial test of the potable water backflow prevention device to confirm proper operation of the device. The test certification for the potable water backflow prevention device was submitted by email to State DDW on February 24, 2022 (Attachment E). County DEHQ completed its report on February 27, 2022 (Attachment F).

3.12 CMWD staff installed a pressure recorder on the potable water backflow prevention device, test cock #4, with the potable water supply off and the recycled water supply remaining on, to confirm a recycled water cross- connection. A rise in pressure was observed at the recorder, verifying the cross- connection was reaching the entire school property.

Page | 5 Incident Report – Hope Elementary School, 3010 Tamarack Ave, Carlsbad, CA 92010 Mar. 15, 2022

3.13 CMWD directed CUSD to physically sever the cross-connection previously identified behind Classroom 35 and instructed the CUSD contractor mark the recycled water pipe in purple. (Photo 5).

3.14 CMWD, under the direction of State DDW, and with County DEHQ oversight, performed part one of a 2-way test, which is a 4-hour test of the school’s private water system.

3.15 As ordered by State DDW, CUSD sent an email notification of school closure for Friday, February 25, 2022 (Attachment G).

3.16 CMWD staff flushed and began introducing chlorine into the school’s potable plumbing system in accordance with standard AWWA C651. CMWD used the slug method with 100 mg/l concentration of chlorine as a disinfectant which is to remain in the pipe for at least three hours. The chlorinated water remained in the private plumbing system for ten hours and averaged at least 100 mg/l of free chlorine. The water in the private plumbing system was then thoroughly flushed and tested periodically for chlorine residual until a total chlorine residual of normal system potable water, approximately 3 mg/l, was reached.

February 25, 2022 (unless otherwise noted)

3.17 Following the disinfection procedure, CMWD returned to the school and confirmed the chlorine residual at each faucet and flushed the super-chlorinated water. After normal system water was introduced to the school’s plumbing, CMWD took the first round of samples for bacteriological testing from 11 sites throughout the school as shown on the map of the Hope School buildings and sampling locations (Attachment H). After 24 hours, and after receiving results Photo 5 - Cross-connection removed at classroom 35.

Page | 6 Incident Report – Hope Elementary School, 3010 Tamarack Ave, Carlsbad, CA 92010 Mar. 15, 2022
showing the absence of E. Coli bacteria in the first round of samples, CMWD took the second round of samples and tested them on February 26, 2022. CMWD also directed CUSD to replace the filters at all drinking fountains, which CMWD oversaw.

On Sunday, February 27, the test results for the second round of samples came back absent for E. Coli bacteria. CMWD communicated this information to State DDW, and State DDW indicated the water in the school plumbing was safe.

CMWD subsequently submitted the test results to County DEHQ and State DDW (Attachment I).

3.18 CMWD performed, under the direction of State DDW, and as part two of the 2- way test, a 24-hour test on the recycled water irrigation system. Upon completion of the test on February 26, the test report was sent to County DEHQ.

The recycled water meter was removed and the meter valve was locked off by CMWD (Photo 6). There has been no recycled water service to the school site since that time.

3.19 On Sunday, February 27, 2022, State DDW approved the corrective actions taken and deemed the water quality test results acceptable and granted approval to reopen the school (Attachment J).

3.20 CUSD reopened the school on Monday, February 28, 2022 (Attachments K) and provided information about the incident to the parents and staff (Attachment L).

Photo 6 - Recycled water meter
removed and meter valve locked off.

Page | 7 Incident Report – Hope Elementary School, 3010 Tamarack Ave, Carlsbad, CA 92010 Mar. 15, 2022
February 28 – current

3.21 CMWD staff have continued to work with CUSD and CUSD’s construction contractor to expose the school’s recycled water irrigation system and assure that all irrigation piping is separate from any other system. No additional cross- connection locations have been found.

3.22 The meter that previously served recycled water to this site has been removed and the school has no connection to the recycled water system at this time.

Hope School will not be allowed to connect back to the recycled water system until CUSD submits landscape and irrigation plans to CMWD and County DEHQ for approval. On March 10, 2022, CMWD provided CUSD and CUSD’s construction contractor the following steps that must be taken prior to reconnection of the school’s recycled water irrigation system.

3.22.1 CUSD’s construction contractor, under the direction of CUSD , must
excavate areas identified by CMWD and County DEHQ staff to verify the potable water line cross-connected with irrigation system is fully abandoned at the point of connection(s).

3.22.2 CUSD will submit current irrigation plans for the entire school site, along with an E-27 water meter permit application to the city’s Land Development and Engineering Department. These plans must include a temporary potable high line as well as any alterations to the school’s recycled water irrigation system.

3.22.3 Once routed to CMWD via the Land Development and Engineering Department, the plans will be reviewed by CMWD and County DEHQ.

3.22.4 The old potable irrigation service still on site will be utilized as the feed for the temporary potable high line to irrigation system.

3.22.5 CUSD must instruct its construction contractor to expose all piping around the current recycled meter box and the old potable irrigation meter box, including the two-inch backflow still on site.

3.22.6 The two-inch backflow on the old potable irrigation line will be tested by CUSD and witnessed by CMWD and must pass in order for a meter to be issued. If the backflow test does NOT pass, a new device must be installed.

Page | 8 Incident Report – Hope Elementary School, 3010 Tamarack Ave, Carlsbad, CA 92010 Mar. 15, 2022

3.22.7 After the backflow testing and the connection between the irrigation line and the old potable irrigation line is made and observed with CMWD cross-connection oversight, potable water can be introduced to the site utilizing this connection.

3.23 Future connection to recycled supply for irrigation:

3.23.1 After approval of new landscape and irrigation plans by County DEHQ and CMWD, CMWD, along with County DEHQ oversight, will then schedule and perform a cross-connection test for the site.

3.23.2 After successful completion of the cross-connection test, a recycled meter can be issued and installed on site, and CUSD can disconnect the temporary potable feed, with CMWD oversight, and reconnect the existing irrigation to the recycled water meter.

4.0 H ope Sch
ool Recycled Water Use Site Certification/Site Utilities Plan

4.1 On April 7, 2017, County DEHQ issued a Recycled Water Use Site Certification, LRWS 2015-359, following successful completion of cross-connection testing in accordance with State, County and CMWD regulations governing the use of recycled water. At that time, portions of the irrigation system for Hope School were converted from potable to recycled water supply.

4.2 This 2017 certification and the CMWD Rules and Regulations for Recycled Water Use, which are provided to the water user, such as CUSD, upon site certification, require the designation of a Site Supervisor. The Site Supervisor is responsible for the operation, maintenance or alteration of the on-site recycled water irrigation system, including the requirement to submit plans for review and approval by CMWD and County DEHQ before making any changes to the on-site recycled water system.

4.3 The Hope School Site Utilities Plan relating to the current construction activities at Hope School was approved by the Division of State Architect in June 2020 and construction at Hope School was underway in the summer of 2020.

4.4 The city issued a Stop Work Order to CUSD on July 30, 2020 because the city had not received an application for a grading permit for grading work being performed at Hope School. Around this same time period, CMWD reminded CUSD that any changes to the school’s recycled water irrigation system would require approval from CMWD and County DEHQ. Although CUSD sent an email Page | 9 Incident Report – Hope Elementary School, 3010 Tamarack Ave, Carlsbad, CA 92010 Mar. 15, 2022
indicating that it did not believe its construction related plumbing activities implicated the school’s recycled water system (Attachment M), CMWD recommended CUSD install a temporary potable high line for the irrigation system to avoid any potential for a cross-connection (Attachment N).

4.5 On February 24, 2022, when CMWD responded to Hope School, construction at the school was proceeding despite the Stop Work Order that had been issued by the City. CUSD or its contractor had not submitted landscape and irrigation plans to the city, which are reviewed and approved by CMWD and the County DEHQ before the installation of, or modifications to a recycled irrigation system.

4.6 As described above in Section 3.10, CUSD’s construction contractor recently provided the city with five drawing sheets. No modifications to the school’s recycled water irrigation system are shown on these drawings. While drawing sheet C005 shows a 2” irrigation line running under one of the new classroom buildings, Building H, irrigation plans have not been submitted to CMWD. The irrigation line under Building H has been relocated. The cross-connection location was not on the relocated line but in an area not shown on the drawings.

5.0 Rec
ommend
ed Actions
Additionally, CMWD will perform the following actions:

5.1 Schedule cross-connection with County DEHQ for other CUSD schools served by CMWD that have recycled water irrigation systems and have undergone recent construction work on plumbing or irrigation systems to ensure compliance with regulatory standards.

5.2 Modify CMWD Recycled Water Rules and Regulations to assign Site Supervisor status to a person in a management or executive management position of authority in the water user entity for compliance with potable and recycled water regulations.

5.3 Request assistance from the State DDW and County DEHQ to reinforce CMWD’s authority over recycled water regulations at school sites.

Incident Report – Hope Elementary School, 3010 Tamarack Ave, Carlsbad, CA 92010 Mar. 15, 2022

ATTACHMENT A
1 Jeanette Brown
Subject: FW: Water
Attachments: 21L0667 1_Report_&_COC FINAL 01 11 22 1526.pdf From: Derrick Anderson <[email protected] t>
Sent: Friday, February 25, 2022 12:12 PM
To: Eric Sanders <[email protected]>; Vicki Quiram <[email protected]> Cc: Eric Dill <[email protected]>; Jessica Kimbrell <[email protected]>; Byron <byron@ppc‐ sd.com>; Derrick Anderson <derrick@ppc‐sd.com>
Subject: Fwd: Water
Good afternoon Ms. Quiram and Mr. Sanders,
Thank you again for the collaboration at Hope ES yesterday and today. We look forward to completing the testing and inspection work necessary to resume campus operations as soon as approvals are attained.

As promised during our site meeting this morning, below please find the second round of water tes ting that was conducted by CUSD's contractor, Erickson‐Hall (EHCC), for the Hope ES modernization project. You will find the narrative prepared by EHCC, along with the site map depicting the sampling and flushing locations. Also attached is the analytical results of the water sampling/testi ng.

I will send you the first test results conducted by EHCC under separate email.

CUSD looks forward to a meeting in the near future with City of Carlsbad executive staff to continue and improve the collaborative efforts needed for us to successfully deliver CUSD projects.

Sincerely,
Derrick
‐‐‐‐‐‐‐‐‐‐ Forwarded message ‐‐‐‐
‐‐‐‐‐
From: Derrick Anderson <[email protected]> Date: Thu, Feb 24, 2022 at 2:12 PM
Subject: Fwd: Water
To: Eric Dill <[email protected]>
Cc: Jessica Kimbrell <[email protected]> Hi Eric,
Here is the most recent test
ing summary provided by Erickson‐Hall via their plumber. Please let me know if you have any questions.

Best,
Derrick
2 ‐‐‐‐‐‐‐‐‐‐ Forwarded message ‐‐‐‐‐‐‐‐‐
From: Alex Alon <[email protected]>
Date: Wed, Feb 9, 2022 at 10:34 AM
Subject: RE: Water
To: Derrick Anderson <[email protected]> Cc: Brian Litchfield <[email protected]>, John Thomas <[email protected]>, Tyler Ennis <[email protected]>
Derrick,
Please see the attached report. I reached out to Gary at Interpipe one more tim e to make sure I had the correct
information. I tried to organize the info in the best way. Here is the summary to date, findings and some recommendations:
 We performed a 4th test with results on 1/11/22. Testing history as follows.

1. 4/21 preliminary test for E.coli & Bac‐T

2. 8/13
Testing as required for turnover for E.Coli & Bac‐T

3. 9/10 Testing in response to conc erns from the school for E.Coli & Bac‐T

4. 1/11 (attached)‐ most recent test further investigating. Include s E.Coli & Bac‐t as well as Odor and Color.  The most recent test still shows the water is within standards for safe drinking water (e.coli and Bac‐t).  Prior to the final test, our team performed multi ple visual inspections and building flushing in early December at multiple locations and prior to the most recent test. Results were mixed. In certain buildings water was clear and upon return on a different day, would have faint traces of color then clear again on another day.  Our field investigations have narrowed the potential source location to the North side of the campus. Specifically the main that runs by Building A and west between buildings F & J The South side showed no visual traces of color.  The work that was performed in the area above was to an existing main pipe. Our connection points were existing copper. We assume the entire main (existing portions to remain) heading East/West was copper as well. Per plans we installed new PVC pipe to parts of the existing copper pipe to modify the main for the new buildings.  There is an existing vault somewhere by the drive that was not part of this project (I personally have not seen this vault). We believe this is the source for the domestic water. We did not check anything there.  When reviewing the most recent test results, it appears the color/odor may be coming from trace metals found in the report. This is only an observation that we are making. We recommend the report is reviewed with someone familiar with EPA regulation requirements in this regards.
 We have not seen or heard reports of ground water coming to the surface in the suspect area that could be an indication of a water break.
3  We have not seen or heard reports of a loss in water pressures that could be an indication of a water break.  Recommendations
o Find out if there are any anomalies in water usage and or after hour meters r unning to see if there could be a water main break
o Check with the city to see if the incoming water has issues. o Un
derstand what is in the exis ting vault at the drive area to see if there could be something there? o Look at replacing the old copp er mains with PVC.

I hope this information is useful. Let me know if there is anything else we can do on this.

Thanks,
Alex Alon
Project Executive
Erickson‐Hall Construction Co.

O: 760.796.7700 | F: 760.796.7750 | M: 760.670.8487
From: Derrick Anderson <[email protected]> Sent: Tuesday, February 8, 2022 11:52 AM
To: Alex Alon <[email protected]>
Cc: Brian Litchfield <[email protected]>; John Thomas <[email protected]> Subject: Fwd: Water
Good morning Alex,
It looks like a striking coincidence that this email came in just as we were talking about the water quality issue at Hope.

Looking forward to your email with the test results and full report. 4 Best regards,
Derrick
‐‐‐‐‐‐‐‐‐‐ Forwarded message ‐‐‐‐‐‐‐‐‐
From: Ashley Rossiter <[email protected]>
Date: Tue, Feb 8, 2022 at 11:37 AM
Subject: Water
To: Derrick Anderson <[email protected]> Hi Derrick,
The water from
the water bottle filling station and the drinking fountain is coming out yellow. Based on this and the cup of residue I gave you last week, I was wondering what the status of this concern is and what the next steps are. Is it possible to expedite this issue being addressed?
Ashley Rossiter
Principal
Hope Elementary School
Carlsbad Unified School District
760.331.5999
‐‐
Derrick Anderson, P.E., CCM
Director, Construction Management & Facilities
Carlsbad Unified School District
P: (760) 331‐5022
5 C: (858) 335‐5819
[email protected]
‐‐
Derrick Anderson, P.E., CCM
Bond Program Manager
Carlsbad Unif
ied School District
P: (760) 331‐5022
C: (858) 335‐5819
[email protected]
‐‐
Derrick Anderson, P.E., CCM
Bond Program Manager
Carlsbad Unif
ied School District
P: (760) 331‐5022
C: (858) 335‐5819
[email protected]
CAUTION: Do not open attachments or click on links unless you recognize the sender and know the content is safe.

Incident Report – Hope Elementary School, 3010 Tamarack Ave, Carlsbad, CA 92010 Mar. 15, 2022

ATTACHMENT B
EnviroMatrix Analytical, Inc.

Interpipe Contracting, Inc.

Hope Es.

Santee, CA 92071
10870 Hartley Road
Rolf Wachter
Enclosed are the results of analyses for samples received by the laboratory on 03/31/21 15:45. Samples were analyzed pursuant to client request utilizing EPA or other ELAP approved methodologies. I certify that this data is in compliance both technically and for completeness. 02 April 2021
Attn:

EMA Log #: 21C1151
Laboratory Director
Leland S. Pitt
CA ELA
P Certification #: 2564
Project:
9590 Chesapeake Dr. - San Diego, California 92123 - (858) 560-7717 - Fax (858) 560-7763 Analytical Chemistry Laboratory
PLEASE NOTE OUR NEW LOCATION:

Project Name:

Interpipe Contracting, Inc.Client Name: EMA Log #: 21C1151 Hope Es.

Sample ID Laboratory ID Matrix Date Sampled
ANA

LYTICAL REPORT FOR SAMPLES
Date Received
Classroom Sink 1 21C1151-01 03/31/21 13:45 03/31/21 15:45Drinking Water Classroom Sink 2 21C1151-02 03/31/21 13:45 03/31/21 15:45Drinking Water Classroom Sink 3 21C1151-03 03/31/21 13:45 03/31/21 15:45Drinking Water Classroom Sink 4 21C1151-04 03/31/21 13:45 03/31/21 15:45Drinking Water The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety.

Page 2 of 4 ends

EnviroMatrix Analytical, Inc.

Project Name:

Interpipe Contracting, Inc.Client Name: EMA Log #: 21C1151 Hope Es.

Microbiological Parameters by Standard Methods
Analyte Result MDL Limit
Reporting
Units Dilution Batch
Sample Prepared
Sample Analyzed Method Notes Analyst
Classroom Sink 1 (21C1151-01) Drinking Wate
r Sampled: 03/31/21 13:45 Received: 03/31/21 15:45 SM922303/31/21 15:02
04/01/21 15:33
None 10401311Total Coliforms Absent CC
"03/31/21 15:02
04/01/21 15:33
" ""E. Coli Absent CC
Classroom Sink 2 (21C1151-02) Drinking Water Sampled: 03/31/21 13:45 Received: 03/31/21 15:45 SM922303/31/21 15:02
04/01/21 15:33
None 10401311Total Coliforms Absent CC
"03/31/21 15:02
04/01/21 15:33
" ""E. Coli Absent CC
Classroom Sink 3 (21C1151-03) Drinking Water Sampled: 03/31/21 13:45 Received: 03/31/21 15:45 SM922303/31/21 15:02
04/01/21 15:33
None 10401311Total Coliforms Absent CC
"03/31/21 15:02
04/01/21 15:33
" ""E. Coli Absent CC
Classroom Sink 4 (21C1151-04) Drinking Water Sampled: 03/31/21 13:45 Received: 03/31/21 15:45 SM922303/31/21 15:02
04/01/21 15:33
None 10401311Total Coliforms Absent CC
"03/31/21 15:02
04/01/21 15:33
" ""E. Coli Absent CC
The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety.

Page 3 of 4 ends

EnviroMatrix Analytical, Inc.

Project Name:

Interpipe Contracting, Inc.Client Name: EMA Log #: 21C1151 Hope Es.

Notes and Definitions
A-03 Absent
Sample results reported on a dry weight basis (if indicated in units column) Relative Percent DifferenceRPD
dry
Not ReportedNR
Analyte NOT DETECTED at or above the reporting limit (or method detection limit when specified)ND MDL Method detection limit (indicated per client's request) The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety.

Page 4 of 4 ends

EnviroMatrix Analytical, Inc.
, \ C , ,-� 'J ----- , 11< ...

CHAIN-OF-CUSTODY RECORD � l \ \S \ :rs;- -EnviroMatrix 0 Analytical, Inc.

Page_of_
- .

EMALOG#:

Client: \_(\::i.,P\/ 0\ V t { ( (\ � 11 (\--.'I\ q_
Attn: "'- -
Sarnplers(s):

Address: \()ll //7) 1-\-cdl ()..., D j_ -
Phone: (1 \ ll1 � 'H., 7/�j Fax:

Email: l.r'I l:n !o,i .r,��" •();�'c , LOA
Billing Address:

Project ID:

Project#: \.+/\�{ ,- <; PO#:

Sample Sample Sample Container
ID# Client Sample ID Date Time Matrix # I Type
I r \r,,l;, H1f1t\ �: nr \ 11}1 l A� 1 I
2 ( \{A<-f;. 'l C ('\ c_; I\'( ·1 1,11 \ : ��
3 ("\ ul� 'I 'lC:cJ /'"' C... ' � �; '"1, 1/'1 l \ : 't'i 4 n °' C.,') Yr1cir � :. {\ v-; /� n,; 7/ '\ :--'t�
5 I
6 7
8 9
10 Matrix Codes: A• Air, DW • Drinking Water, GW; Gr0W1dwater, SW; Stonu Water WW - Wastewaler, s Soil,$£D Sediment, SD - Solid, T ... Tissue, 0 - Oil, L -Liquid Shipped By: □ Courier □ UPS □ FedEx □ USPS □ Client Drop Off □ Other 'Turn-Arouod, Timr: □ Same Day □ I day □ 2 day □ 3 day □ 4 day □ S day •�o (7-business days) 1Reportlng Requirements: □ PDF o Excel □ Geotra<:ker/EDF □ Hard Copy □ EDT □ CEDEN □ SDWIS 1Salllple Disposal: □ By LaboratO(}' o 'Return to Client. P/U o, Delivery cArchive - Sample Integrity
Correct Containerf.'Yes Jo NIA Containers Properly Preseved;/Ycs No NIA Custody Seals Intact:Yes No ,NIA) Temp@ Receipt: 14 r � COC/Labels Agr�: � No NIA Sampled B;t;/Client 'MA Aulosampler Project/Sample'Location/Address: L/
Project/Sample Comments:
'Additional costs may apply. Please note there is a S35 minimum charge for all clients. 'EMA reserves !he righl lo return any samples !hat do not match our wasle profile. �J�u LnesapeaKe ur. :,une J - :,anu1ego, LA �.LJ.oj - rnone \OJ�J 'l/'1-��"� u g. ..I
z f-<
z "'
Q ]
D
0 ..,. � u"' l.ll .., ,-1 "' c:0 D !:: - x f-< :t
D l.ll � -a' z
8 D
N D 0 □
.,;
g
:t "' "'
1l .; � � �
D
i5
;;
D � ::E D D
D z ,.._ .,; &
�
iQ 8 "' D
� "' f-< .s Cl u D > D "B D
� � z � N
£ u N
@
0 l.ll D ., "" a ,.._ 0
� t, � N D
-� .. � "' � - ::c u
6 0 "' ... ;z: < N N .. "' "' D D u

RELINQUISHED BY
Signature .., ! ___ - /
Prinl . \ /1.\ \ \.'I c;;,r, t\.4 'L,,
COffl>any: 'L "-tn ll O, 'iJ f
Signature
Print
Company:

Signature
Print
Company:
� 0 :::
i:5
D
C N
.."' <
] "
::E z
D .0
""
� :, u
� ...u""
,-1
u 8f-<
Reo uested Analysis
G::

C 0
� -� t: .,., 2.. E G
0 :, .s � .;<> C C " .,_ ·o '6 ..c "' l.ll l.ll c -
� � :0 D D □ _g c >,
� iZ" � u ...
�
:, 0 f-<
�
0 D D
-e .s6 u
� 0 .l!
] � D
§ ... :i 0 D
� u ;;:: -cl
ui .,;· .:! u 0
2 D
D
i!:
:, ..c D D 0 ... 0 ., "'
§
0 e ..c
t: 0 :s "' ·c:
e e §
"'
� .. Q 0 :;;; .s " f0 Q C 0 c:0 u ::c u u l.ll D D 0 0
7'.
't'-
I\
,-...·
DATFJflME _ RECEIVED BY
'3-}i·ll Signature ..X . /\..�.

Print P:;i,ici'IY, ¥ J\ ,{
�·.L\S er- Company: YV Y ./
Signature
Print
Company:

Signature
Print
Company:
j
NOTE: By relinquishing samples to EMA, [nc., client agrees to pay for the services requested on th.is COC form and any additional analyses performed on this project. Payment for services is due within 30 days from date of invoice. Samples will be disposed of 7 days after report has been finalized unless otherwise noted. All \Vork is subject to EMA's terms and conlitions. ft
II
I
I
' v
G
k 2
I
'
'
i!
I C o d
.,
I
(
I
I
I
trogen
d
e
s
- t
(,
r \. .

I
EnviroMatrix Analytical, Inc.

Interpipe Contracting, Inc.

Hope Elementary
Santee, CA 92071
10870 Hartley Road
Ken Brown
Enclosed are the results of analyses for samples received by the laboratory on 08/11/21 14:32. Samples were analyzed pursuant to client request utilizing EPA or other ELA P approved methodologies. I certify that this
data is in compliance both technically and for completeness. 13 August 2021
Attn:

EMA Log #: 21H0353
Laboratory Director
Leland S. Pitt
CA ELAP Certification #: 2564
Project:
9590 Chesapeake Dr. - San Diego, California 92123 - (858) 560-7717 - Fax (858) 560-7763 Analytical Chemistry Laboratory
PLEASE NOTE OUR NEW LOCATION:

Project Name:

Interpipe Contracting, Inc.Client Name: EMA Log #: 21H0353 Hope Elementary
Sample ID Laboratory ID Matrix Date Sampled

ANALYTICAL REPORT FOR SAMPLES
Date Received
BUILDING K FRONT BUBBLER 21H0353-01 08/11/21 13:00 08/11/21 14:32Drinking Water BUILDING K REAR BUBBLER 21H0353-02 08/11/21 13:00 08/11/21 14:32Drinking Water BUILDING K DRINK FNTN. 21H0353-03 08/11/21 13:00 08/11/21 14:32Drinking Water BUILDING G FRONT BUBBLER 21H0353-04 08/11/21 13:06 08/11/21 14:32Drinking Water BUILDING G BACK BUBBLER 21H0353-05 08/11/21 13:06 08/11/21 14:32Drinking Water BUILDING G DRNK. FNTN. 21H0353-06 08/11/21 13:06 08/11/21 14:32Drinking Water BUILDING J FRONT BUBBLER 21H0353-07 08/11/21 13:12 08/11/21 14:32Drinking Water BUILDING J BACK BUBBLER 21H0353-08 08/11/21 13:12 08/11/21 14:32Drinking Water BUILDING J DRNK FNTN 21H0353-09 08/11/21 13:12 08/11/21 14:32Drinking Water BUILDING A NURSE STATION 21H0353-10 08/11/21 13:21 08/11/21 14:32Drinking Water BUILDING C CLASSROOM SINK 21H0353-11 08/
11/21 13:30 08/11/21 14:32Drinking Water
KITCHEN BOILER 21H0353-12 08/11/21 13:35 08/11/21 14:32Drinking Water The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety.

Page 2 of 5 ends

EnviroMatrix Analytical, Inc.

Project Name:

Interpipe Contracting, Inc.Client Name: EMA Log #: 21H0353 Hope Elementary
Microbiological Parameters by Standard Methods
Analyte Result MDL Limit
Reporting
Units Dilution Batch
Sample Prepared
Sample Analyzed Method Notes Analyst
BUILDING K FRONT BUBBLER (21H0353-01) Drinking Wate
r Sampled: 08/11/21 13:00 Received: 08/11/21 14:32 SM922308/11/21 15:00
08/12/21 16:01
None 10811691Total Coliforms Absent CC
"08/11/21 15:00
08/12/21 16:01
" ""E. Coli Absent CC
BUILDING K REAR BUBBLER (21H0353-02) Drinking Water Sampled: 08/11/21 13:00 Received: 08/11/21 14:32 SM922308/11/21 15:00
08/12/21 16:01
None 10811691Total Coliforms Absent CC
"08/11/21 15:00
08/12/21 16:01
" ""E. Coli Absent CC
BUILDING K DRINK FNTN. (21H0353-03) Drinking Water Sampled: 08/11/21 13:00 Received: 08/11/21 14:32 SM922308/11/21 15:00
08/12/21 16:01
None 10811691Total Coliforms Absent CC
"08/11/21 15:00
08/12/21 16:01
" ""E. Coli Absent CC
BUILDING G FRONT BUBBLER (21H0353-04) Drinking Water Sampled: 08/11/21 13:06 Received: 08/11/21 14:32 SM922308/11/21 15:00
08/12/21 16:01
None 10811691Total Coliforms Absent CC
"08/11/21 15:00
08/12/21 16:01
" ""E. Coli Absent CC
BUILDING G BACK BUBBLER (21H0353-05) Drinking Water Sampled: 08/11/21 13:06 Received: 08/11/21 14:32 SM922308/11/21 15:00
08/12/21 16:01
None 10811691Total Coliforms Absent CC
"08/11/21 15:00
08/12/21 16:01
" ""E. Coli Absent CC
BUILDING G DRNK. FNTN. (21H0353-06) Drinking Water Sampled: 08/11/21 13:06 Received: 08/11/21 14:32 SM922308/11/21 15:00
08/12/21 16:01
None 10811691Total Coliforms Absent CC
"08/11/21 15:00
08/12/21 16:01
" ""E. Coli Absent CC
BUILDING J FRONT BUBBLER (21H0353-07) Drinking Water Sampled: 08/11/21 13:12 Received: 08/11/21 14:32 SM922308/11/21 15:00
08/12/21 16:01
None 10811691Total Coliforms Absent CC
"08/11/21 15:00
08/12/21 16:01
" ""E. Coli Absent CC
The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety.

Page 3 of 5 ends

EnviroMatrix Analytical, Inc.

Project Name:

Interpipe Contracting, Inc.Client Name: EMA Log #: 21H0353 Hope Elementary
Microbiological Parameters by Standard Methods
Analyte Result MDL Limit
Reporting
Units Dilution Batch
Sample Prepared
Sample Analyzed Method Notes Analyst
BUILDING J BACK BUBBLER (21H0353-08) Drinking Wate
r Sampled: 08/11/21 13:12 Received: 08/11/21 14:32 SM922308/11/21 15:00
08/12/21 16:01
None 10811691Total Coliforms Absent CC
"08/11/21 15:00
08/12/21 16:01
" ""E. Coli Absent CC
BUILDING J DRNK FNTN (21H0353-09) Drinking Water Sampled: 08/11/21 13:12 Received: 08/11/21 14:32 SM922308/11/21 15:00
08/12/21 16:01
None 10811691Total Coliforms Absent CC
"08/11/21 15:00
08/12/21 16:01
" ""E. Coli Absent CC
BUILDING A NURSE STATION (21H0353-10) Drinking Water Sampled: 08/11/21 13:21 Received: 08/11/21 14:32 SM922308/11/21 15:00
08/12/21 16:01
None 10811691Total Coliforms Absent CC
"08/11/21 15:00
08/12/21 16:01
" ""E. Coli Absent CC
BUILDING C CLASSROOM SINK (21H0353-11) Drinking Water Sampled: 08/11/21 13:30 Received: 08/11/21 14:32 SM922308/11/21 15:00
08/12/21 16:01
None 10811691Total Coliforms Absent CC
"08/11/21 15:00
08/12/21 16:01
" ""E. Coli Absent CC
KITCHEN BOILER (21H0353-12) Drinking Water Sampled: 08/11/21 13:35 Received: 08/11/21 14:32 SM922308/11/21 15:00
08/12/21 16:01
None 10811691Total Coliforms Absent CC
"08/11/21 15:00
08/12/21 16:01
" ""E. Coli Absent CC
The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety.

Page 4 of 5 ends

EnviroMatrix Analytical, Inc.

Project Name:

Interpipe Contracting, Inc.Client Name: EMA Log #: 21H0353 Hope Elementary
Notes and Definitions
A-03 Absent
Sample results reported on a dry weight basis (if indicated in units column) Relative Percent DifferenceRPD
dry
Not ReportedNR
Analyte NOT DETECTED at or above the reporting limit (or method detection limit when specified)ND MDL Method detection limit (indicated per client's request) The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety.

Page 5 of 5 ends

EnviroMatrix Analytical, Inc.

CHAIN-OF-CUSTODY RECORD
2\ rt 0b�3,
-EnviroMatrix 0 Analytical, Inc.

Page / of
2, - -
EMA LOG#:

Client: / ltn1;;:P.. .IJ.Ae- ('"'_n, rr-nAe_77A,I ,_
Attn:

Sarnplers(s):

Address:

Phone: Fax:

Email:

Billing Address:

Project ID: Hope t /e'(Yl�r...\-11.fJI
Project#: - PO#:
fM
Sample Sample Sample Container
ID# Client Sample ID Date Time Matrix #
I T ype
I ALA/- I< --- ,!,t.1tL/h..a �/11 I. "gr,, I - I
2 61-IJ(,,.. k •1,e"U, If?, ·" - __,. �, /.'re,-o
3 4-,.A.L_ I<. /'JL,,..,Jt' --·- • . ·i:vI I It·-,.,
4 P.,,'-,. G Ao..,,- e,IJl?d.?.s:> -�, /. oJ..
5 11.L(){.. 6,- lt..a.;,, ... ,. .. --- J?; I /;oL.
�� /,. /'J,t..µ,te l:,vTN. .!i'/,, /b(,
7 A,,1,Jv ..:]"" � wa. a- _,. �, /• I"-
8 A-£.v_ -::r- -1':t.-- .A • .A ..:I .,,,,,.�. �i /:/2. 9 �� L T r'I, .,.,,,, ,C,vn..J t/4, 1-·,2
10 &4r,. ..q ,/Vp,C.s(!'" S71t770� �, 1/.'2.I
Matrix Codes: A= Air, DW = Drinking Water, GW = Groundwater, SW= Stonn Water WW= Wastewater, S = Soil, SED = Sediment, SD= Solid, T
= Tissue, 0 = Oil, L = Liquid
Shipped By: o Courier □ UPS □ FedEx o USPS o Client Drop Off o Other 1Turo-Around-Time: □ Same Day □ l day □ 2 day o 3 day o 4 day □ 5 day )(STD (7-business days) 1Reporting Requir<meots: o PDF□ Excel□ Geotracker/EDF o Hard Copy□ EDf □ �EDEN o SDWlS 1Sample Disposal: o By Laboratory □ 2Retum to Client: P/U or Delivery □ Archive - Sample Integrity
Correct Containers: ft c/ No N/ A Containers Properly Preseved:fYeJ No NIA Custody Seals Intact:-Yes No �14 Temp (a) Receipt: Y'(:.. ,._., COC/Labels Ab'l'ec:\:Yes )',o N/A Sampled By:j'lient}EMA Autosampler Project/Sample Location/Address:

Project/Sample Comments:
1Additional costs may apply. Please note there is a $35 minimum charge for all client�. 2EMA reserves the right to return any samples that do not match our waste profile. 9590 Chesapeake Dr. Suite 5 - San Diego, CA 92123 - Phone (619) Ii ug-
Oil "d
g ,.-l
;z: f- " z
if./ .?.
;,-, □ £
.s "'
..:, � u 0 "' '1.l ,.-l □ "' Cil "' □ f-- ;:; ::c f- .?,, r□ iLl ::E ;z: ?2 C C □ N □ □ N 0
,,.; iLl ::c if./ f-
].;
� □ Oil
;;j: "' � Ci "' -< " f- ;z: ., s □ a Cil □ □ ::Ez ., □ r-- ::E z "' '3 "' "' u., G "' □ � □ ;;j: "' 0 f- ., -< ..c: 0 G ·E Q..
□ > □ S2□ 0 if./
z � " c:, � N ::,
� :2 u □ N u �
0 J.I.) � u Q.. 0 r-.
� e 0 t, "' N □ f: uN 00
� <n 00 � ::c -� u c..
;: _, 8 0 "" c.. ;z: .,:: u N N -0
'D 'D □ □ u f- u
R?LINQU],HED BY
Sip1ature 6,,£./ / ----�
Print Chrts YovnfJ
Company: -::Z: t-.fPf'Pi�
SibTflature
Print
Company:

Signature
Print
Company:

Rec uested. --J---
G:'
C
.9 f-
� t:: ::E "., 2 � s.; G " ::, B 0 'ii, " � "' C: C Q.. :a ..c: u., '1.l J.I.) c ·a c..
:e "' □ □ □ ., 0
-< i: ;,-,
�
..c
� u., ::l u g,
I�
f- 0 □ □ i§ "'6 ::E u -
B 0 <B
s � □ ., Ci .... 30 □ u C: 0 -0 "' � i,.i "' 0 u 0 "' □ ::, :.a □ ::l □ + 0 □ 6f- " e' " §-
0 ..c -0
t: .... c.. ·i: " 0 Ci 0 "' 0
,B � � 21 0 0 0 "' � 5:: 0 Cil u u C
u u J.I.) ::c □ □ □ □
x..

X
I')(.
){
'X
'(
I>
I�
DATE/TIME RJjCEIYED BY /
Signature A,r-� I/
Print �, ll !1-1 l\i:�� Clh""ivl� l-'llhJJU...1-'
Company:� ,
Signature
Print
Company:

Signature
Print
Company:

NOTE: By relinquishing samples to EMA, tnc., client agrees to pay for the services requested on this COC form and any additional analyses perfonned on this project. Payment for services is due within 30 days from date of invoice. Sarnple!i will be disposed of 7 days after report has been finalized unless othenvise noted. All work is subject to EMA's tenns and conditions. l
474-8548
.-,-· \naluc,j_"-
~ -
-: - -
" 00
- -v- -
.
·-
-~ ·-L. - -
-
-
- · -
- ·~ .... X
6 -
~ . -
.-, - - ,
'
~
~- IX
.
, - .
'
'--
2-\ \1 0 1:) S"J
CHAIN-OF-CUSTODY RECORD -EnviroMatrix ® Analytical, Inc.

Page�of �
EMA LOG#: I
Client: //f/7[9'J..P I/>€ C€),-..J I "�-./',.=,7JV6-
Attn:

Samplers(s):

Address:

Phone: Fax:

Email:

Billing Add(ess:

Project ID: Ha pe E }t:>W1�ri+11.r.J
Project#: ✓ PO#:

I' ..

Sample Sample Sample Con�iner
ID# Client Sample ID Date Time Matrix # I Type
I\ .&Jv .... C c.�_A-<;<� .... s.� "i///1 /;Jo

11. k I ,r-c,�J n..,,,,,::;, f/1, l· �r
Lt
14 ,.,
6 7
8 9
10 Matrix Codes: A= Air, OW,.. Drinking Water, GW • Groundwater, SW• Storm Water WW• Wastewater, S = Soil, SEO= Sediment, SD= Solid, T = Tissue, 0 = Oil, L = Liquid Shipped By: □ Courier □ UPS □ FedEx □ USPS □ Client Drop OIT a Other 1Turn-Around-Timc: a Same Duy a I day □ 2 day a 3 day □ 4 day □ 5 day �TD (?-business days) 'Reporting Requiremcnto: □ PDF□ Excel o Geotracker/EDF o Hard Copy □ EDT□ CEDEN □ SDWIS 'Sample Disposal: □ By Laboratory □ 'Return to Client: P/U or Delivery □ Archive Sample Integrity
Correct Containers� (Yes) No NIA Containers Properly Prescved: {r<JJ'No NIA Custody Seals Intact: Yes No� Temp@ Re<:cipt: y· l,
COC/Labels Agree: feJ No N/A Sampled By:_)1'1'ien!,);MA Autosampler Project/Sample Location/Address: -
Project/Sample Comments:
1 Additional costs may apply. Please note there is a $35 minimum charge for all clients. 2EMA reserves the right 10 retum any samples that do not match our waste profile. 9590 Chesapeake Dr. Suite 5 - San D.
"'

0. � u
z
0 ,-) l:l E-
z
r/}
>. D >< ]
� 0 {=. u ...J
� '° "' □ !:::r: E- >. □ LL1 ;:E c z Q D
"" D 0
.,; w ::i:: r/} E- "'
] � -;;; ;;;: � �
D "' " 'ii
] i:S '° D � ;:!;D
z "
0 ;i
l'"- ;;s
LL, G
r/} 0 ;:E D
:;;: ., r/}
£ 0
g
0 E-
:� <0 > □ S2 0 r/}
� " c:., _, z ""
� :2 u ""
0 w 0 " u .... ""' 0 l'"- 8 � e:, 0 t, "' N D
N 00 .,
.,J � -- !: ""' V) ::c z u ...J '<I' V) Q. < u 6 N "' SC □ 0 u f-, RELINQUISHED BY,,,.

Signature �7 /- .t'"Y?'
Print C.hr-i$ Yovl"!d
Coinpany: ;:r i'\ f,.ff'/>//>'t"
Sib,nan,re
Print
Company:

Signature
Print
Company:

CA 92123 - Ph, ( 619) 4 7 4-8548
ReQ nested Analysis
-0 "� �
'5 " G:' .!2
D 1--
fl 6 Q.>
e § " -;;; G N 0 B .,
Q.> " " ""' -0
LL, LL1 Ul ES ·;: Oil
< D □ D "' " c
[
� LL, :,
z
�
0 0
� u".s:, □ .;""' -;;; 0 0::: 0
� u 0
ui ,;- () u ::I ::I :.2 u D
t u □
8 0.
§'
i
.... � 8 Cl u <£ .... 0'3 B -0 0 " 'ii Cl)
u u u w ::c □
X
lX"

DATE/TIME
,,,., 1..1
l't·.32.
� "'� ], � 0
::I
1--
D
0 .c £ t:: 0 � .... ;i 0 □ -0
0 "' 0 ::, D ... 0 " ..c: :'5!
�
Q.
ci "'
0 :a u ""'
□ 0 □
�CE�VEDBY /')
Signature / v .......... II
Print l">'n'il
Company: bit('
Signature
Print
Company:

Sit.,'llature
Print
Company:
.. ,rne..not,� ,,.

NOTE: By relinquishing samples to EMA, Inc., client agrees to pay for the services requested on this COC form and any additional anolyscs perfonned on this project. Payment for services is due within 30 days from date of invoice. Samples will be disposed of? days after report has been finalized unless otherwise noted. All work is subject to EM A's tenns and conditions. 1ego, ~ne
'-i I -
,.,
\(
l= .,
~
□
□
.,:;
"-
--: -...,
"' -
- en
~ ~ 0
"' ·-
~
u
00 F
- . -, . I -
I
·-
.
-
-
EnviroMatrix Analytical, Inc.

Interpipe Contracting, Inc.

Hope Elementary
Santee, CA 92071
10870 Hartley Road
RJ Smith
Enclosed are the results of analyses for samples received by the laboratory on 11/09/21 1 1:20. Samples were
analyzed pursuant to client request utilizing EPA or other ELAP approved methodologies. I certify that this data is in compliance both technically and for completeness. 10 November 2021
Attn:

EMA Log #: 21K0307
Laboratory Director
Leland S. Pitt
CA ELAP Certification #: 2564
Project:
9590 Chesapeake Dr. - San Diego, California 92123 - (858) 560-7717 - Fax (858) 560-7763 Analytical Chemistry Laboratory
PLEASE NOTE OUR NEW LOCATION:

Project Name:

Interpipe Contracting, Inc.Client Name: EMA Log #: 21K0307 Hope Elementary
Sample ID Laboratory ID Matrix Date Sampled

ANALYTICAL REPORT FOR SAMPLES
Date Received
NURSES SINK 21K0307-01 11/09/21 09:15 11/09/21 11:20Drinking Water BUILDING A STAFF 21K0307-02 11/09/21 09:20 11/09/21 11:20Drinking Water BUILDING C CLASSROOM 21K0307-03 11/09/21 09:25 11/09/21 11:20Drinking Water CLASSROOM #10, BLDG. E 21K0307-04 11/09/21 09:30 11/09/21 11:20Drinking Water CLASSROOM #29, RE-LOCATABLE 21K0307-05 11/09/21 09:35 11/09/21 11:20Drinking Water BLDG. G - DRINKING FNTN 21K0307-06 11/09/21 09:35 11/09/21 11:20Drinking Water BLDG. H - DRINKING FOUNTAIN 21K0307-07 11/09/21 09:40 11/09/21 11:20Drinking Water BLDG. J - STAFF BATHROOM 21K0307-08 11/09/21 09:50 11/09/21 11:20Drinking Water BLDG. J - DRINKING FOUNTAIN 21K0307-09 11/09/21 10:00 11/09/21 11:20Drinking Water KITCHEN - PREP SINK 21K0307-10 11/09/21 10:05 11/09/21 11:20Drinking Water DOMESTIC BACKFLOW 21K0307-11 11/09/21 10:40 11/09/21
11:20Drinking Water
The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety.

Page 2 of 5 ends

EnviroMatrix Analytical, Inc.

Project Name:

Interpipe Contracting, Inc.Client Name: EMA Log #: 21K0307 Hope Elementary
Microbiological Parameters by Standard Methods
Analyte Result MDL Limit
Reporting
Units Dilution Batch
Sample Prepared
Sample Analyzed Method Notes Analyst
NURSES SINK (21K0307-01) Drinking Wate
r Sampled: 11/09/21 09:15 Received: 11/09/21 11:20 SM922311/09/21 16:00
11/10/21 16:00
None 11110331Total Coliforms Absent CC
"11/09/21 16:00
11/10/21 16:00
" ""E. Coli Absent CC
BUILDING A STAFF (21K0307-02) Drinking Water Sampled: 11/09/21 09:20 Received: 11/09/21 11:20 SM922311/09/21 16:00
11/10/21 16:00
None 11110331Total Coliforms Absent CC
"11/09/21 16:00
11/10/21 16:00
" ""E. Coli Absent CC
BUILDING C CLASSROOM (21K0307-03) Drinking Water Sampled: 11/09/21 09:25 Received: 11/09/21 11:20 SM922311/09/21 16:00
11/10/21 16:00
None 11110331Total Coliforms Absent CC
"11/09/21 16:00
11/10/21 16:00
" ""E. Coli Absent CC
CLASSROOM #10, BLDG. E (21K0307-04) Drinking Water Sampled: 11/09/21 09:30 Received: 11/09/21 11:20 SM922311/09/21 16:00
11/10/21 16:00
None 11110331Total Coliforms Absent CC
"11/09/21 16:00
11/10/21 16:00
" ""E. Coli Absent CC
CLASSROOM #29, RE-LOCATABLE (21K0307-05) Drinking Water Sampled: 11/09/21 09:35 Received: 11/09/21 11:20 SM922311/09/21 16:00
11/10/21 16:00
None 11110331Total Coliforms Absent CC
"11/09/21 16:00
11/10/21 16:00
" ""E. Coli Absent CC
BLDG. G - DRINKING FNTN (21K0307-06) Drinking Water Sampled: 11/09/21 09:35 Received: 11/09/21 11:20 SM922311/09/21 16:00
11/10/21 16:00
None 11110331Total Coliforms Absent CC
"11/09/21 16:00
11/10/21 16:00
" ""E. Coli Absent CC
BLDG. H - DRINKING FOUNTAIN (21K0307-07) Drinking Water Sampled: 11/09/21 09:40 Received: 11/09/21 11:20 SM922311/09/21 16:00
11/10/21 16:00
None 11110331Total Coliforms Absent CC
"11/09/21 16:00
11/10/21 16:00
" ""E. Coli Absent CC
The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety.

Page 3 of 5 ends

EnviroMatrix Analytical, Inc.

Project Name:

Page 4 of 5 ends

EnviroMatrix Analytical, Inc.

Project Name:

Interpipe Contracting, Inc.Client Name: EMA Log #: 21K0307 Hope Elementary
Notes and Definitions
A-03 Absent
Sample results reported on a dry weight basis (if indicated in units column) Relative Percent DifferenceRPD
dry
Not ReportedNR
Analyte NOT DETECTED at or above the reporting limit (or method detection limit when specified)ND MDL Method detection limit (indicated per client's request) The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety.

Page 5 of 5 ends

EnviroMatrix Analytical, Inc.
r·1 \\ rz �
J__ - - tCJ. )D - . �
�
I (/1
PageJ.__ of>
CHAIN-OF-CUSTODY RECORD -- \ K\. , .. , c. - Env1r0Matrix Analytical, Inc.

EMA LOG#: 11t7,!;J?..f1f'e
Y'.l'JU U1esapeake JJr. :,,u1tc) - San IJ1ego, LA YL I LJ - l'l1one (b I Y) 414-�)4X Client: ,L/o,oF .G-4: ✓..1G#'7"1AfLY / -�/) ��oJV -HA-1-L kAJLy / A--r
,
Attn:

Samplers(s): M AR_.I:::. F�E-61/\I
Address:

Phone: Fax:

Email:

Billing Address:

Project ID:

Project#: /Jb;:'6 ,&,6,·i7t.:Etl/ll•:ia_ Y PO#:

Sample Sample Sample Container
Ill# Client Sample ID Date Time Matrix # I Type
I AIU/Z...�� <1NI<. //-'1-21 9:15" \)VJ
2 fl Vlt..l>/Pir A-
A _,. rJ
?� 7-'I I l 1 I I r
3 1 -, C c;,e,�A:t, • 0/:1<
4 CL.A-St;12,,,,,..,.. -.11:w:, {3L/J(r. £ 'i':3'0
5 ,.. , ,.,_. -# 2'1 /'<t!fF -L,.., r LrilA,,: 't: �,(� 6 �LAL r... - /. P•ll�/Nt- �,µn..l 9; ?,!:,
7 11..1..JJ&. H - ,u., .. n'u, �, ;:::.,..,t-1-r,,4 ... 9.'V"' 8 IV>./- :r - 57'� r? �-·- 'I: ,,;-o
9 ALI\/'_ J - (l,. ,,JV i�,,- ,:;,,., .. T,A.,AI lln.:,....._ / 10 k.f'T'Crle./ - /J�t:.P S1,1.IV \' IJ'!J•o� \V..

Matrix Codes: A= Air, DW c;c- Drinking Water, GW = Groundwater. S\V = Storm Water WW � Wastewater. S � Soil, SED � Sediment, SD� Solid, T � Tissue, 0 � Oil, L � Liquid Shipped By: u Courier Cl UPS u FedEx re USPS n Client Drop Off CJ Other 1Turn-Around-Timc: :J Same Day � day u 2 day lJ 3 day u 4 day o 5 day u STD ( 7-busine�s days) 1Rcporting Rc(JUirements: r:J PDF ::=i Excel c:1 Geotracker/EDF cJ Hard Copy u EDT Ll CEDEN u SDWIS 1Samplc Disposal: ,- : By Laboratory r--i 2Return to Client: P/U or Delivery □ Archive Sample Integrity
Corn:ct Conlainers:�--a_i, No N/A Containers Propt:rly Prese\ed:(_ Ys} No N/A Custody Seals Intact: Yes No� Temp@ Receipt:JI/D\ ;l,,, • .I',,__ COC/Labels Ag,ree!\�No NI A Sampled By: ciis,i) EMA Autosampler Project/Sample Location/Address:

Project/Sample Comments:
1Additional co�b may apply. Please note lhcre is a $35 minimum charge for all clients. 2EMA reserves the right to return any samples that do not match our waste profile.

Requested Analysis
C
V
u C. Of)
Cl
g ...l "::J
z f--- " z [/)
]
>, D X £i 0 6 G:' .§ 'T ,s u '° WJ ...l LJ f---
'§ t::
::£ x co � \- :;;: " f--- >, z f--- E 2 n WJ ;;;: c z D � " CJ C 0 �' c:j "' D 0 LJ � u � c V
V 0.. "O � .c c<i WJ :r: Cf) f--- if, "- WJ � � v >< [J " oJJ § :;; if,
f--- 2 0 v
if,
< [7 D LJ �
f--- c >,
� i:5 co z >'. " G:' < u C. 0 v 0 D :z z f---
�
[:: 0 [J []
0 - LJ r-- ;;;: 't :l � � u G
[/) D ,Cl
:;;
if, "- [/) � D � V 0 cl
0 f--- '1)
< .D
5 0 n 8 0 () 0 0 C 0.. [] 0 > C ·5 u u 0:: 0 -0 Cf)
D 0 Cf)
z 01 � ,s w.i
if, u u 0 if, LJ " > �
c5
0 :.c 2"' u 01 � D
t
[] LJ Cl :r: � 0 WJ D V u u C. 0 ,., CJ 0.. 0 r--
g
u
g �
-0
0 V
� 0
t:. '° N D
-� i= G t:: u 0 ·c; C'S 00 0 2 0 "' 0
o?J 'fl 00 - :r:

0..
@ u \j 0 0 0 :c ;:,c u ...l V >n D,, z < u "::J 0 0 '1) co u "- u0 N N
ci3 00 '° '° D 0 u f--- u u u :r: D D [] LJ
)(
\
RELINQ__l)ISHEO By -� �--;, DATE/TIME ' RECEIVED BY
Signature�� ,;,;."/
\�\\lU
Signature� )
Prin�bl .c>.k-' ,-£
""
%>.-A l.:.U Print ( �� /\ l'f'\,IV', I\.-.._, Company: / �/'/ /" e= \ ,(_ � Company: / (i;>/g_- A ,,,- Signature Signature .r
Print Prinl
Company: Company:

Signature Signature
Print Print
Company: Company:

NOTE: By relinquishing samples to EMA, lnc., client agrees to pay for the services requested on lhis COC form and any additional analyses performed on this project. Paymem for services is due within 30 days from date of invoice. Samples wil! be <.hsposed uf 7 days after report has been finalized unless otherwise noted. All work is subject to EM A's terms and conditions. 1 '
~
'
I
I , '
'
I
'
~ I -
. ~
; ~ ll~
l .
i '
lj . I
- t .....
~
I
t
r
'
I I I 3. C
I I o1 ) e
k .. I I
I !
i
~ "
I
I
. t I Cl
I
~
I I ti I I \
I I
\ V
I (
-I I ii i l .,.

I I I le
t ( I I
i I ~--- '--
r bi I
. h ho C
If te
� \ \/- � -1_,
CHAIN-OF-CUSTODYRECORD•L \ �O)O 7 - EnviroMatrix® Analytical, Inc.

Page_2:-.of :J-
EMA LOG#: I / A.ITz;IZf 1/1 c
9590 Ch ke DL S 5 San ff CA 92123 - Pl (619) 474-8548
Client: ��G &/,Er'/@J7)4A, y / � Clt:$1NV - ,l'Y,4 "£.

Attn: r::rA..it.y / J:<.. --Y
Samplers(s): ,vlA./2.¥. Ft12.EA1·"1
Address:

Phone: Fax:

Email:

Billing Address:

Project ID: /;r-Yc ✓� _..,. --Gv"m�--- ........ ,.

Project#: PO#:

Sample Sample Sample Container
ID# Client Sample ID Date Time Matrix # I Type
" l)OM.cS77C. 13 A-4< Fe-., .J 11-<?'· ./0.HO NrJ
...,.__ .. - . -
3 4
5 6
7 8
9 10
Matrh Codes: A= Air, !JW = Drinking Water, (iW Ground½ater, SW - Storm Water WW� Wastewater. S � Soil, SED � Sediment, SD~ Solid, T � Tissue, 0 � Oil, L � Liquid Shipped lly: o Courier u UPS u FedEx u USPS u Client Drop Off u Other 1Turn-Around-Tirne: u Same Day }(l.day u 2 day CJ 3 day o 4 day c: 5 day u STD (7-business days) 'Reporting Requirements: u PDF D Excel □ lieotrncker/Ef)F □ Hard Copy " EDT□ CED EN □ SDWIS 1Sarnplc Disposal: G By Laboratory L; .:Return to Client: P/U or Delivery u Archive Sample Integrity ��
Correct Container!: \Ye) No NIA Containers Properly Presevect>·,� No N/A Custody Seals Intact: Yes No\�� Temp <r.!) Rct.:eipt:_ {) ,:-... A; A , ., COC/Labcls Agree: 'i'(e�o N/A Sampled By:( Clien) EMA l\utosampler "-"
Project/Sample Location/Address:

Project/Sample Comments:
1 Additional ..:ost� may apply. Please note there is a $35 minimum charge for all clients. 2EMA reserves the right to return any samples that do not match our waste profile.

V
u 0..
" g w u
z f- >
i (/)
] >, [] ><
0 0 u i:S '° w '- ...l [J '° O'.I C') D f-- >< f- ;.,-, :c f-[J CL] 2 c 7. z lJ t'.5 N 0 0 [J :,,'.
,-,.; [..Ll :c (/) f- Ch
] X LJ " bJ)
:::;: 0:: Cl � <t'. V f- f- V Cl0 i:S IXi 0 z 2 v 0
z i - u
� � 2
Ch G
(/) D 2 lJ
:::;: " 0 f- 2' <t'.
.c,
u G 0.. D > D ·5 1,,) LJ
�
r./l i < � � "' c:: = "' 5: � u [J
N u
V 0 w � u
0 0 D 1./
es c '° "' g � u N 00
'<l <n 00 - 0..
� z u d 0 ,,, <t'. u
6 rs N
'° '° 0 0 u f- u
RFl�S�V�
Signatur,r'Afl'� -------
Print /:1'1 ,a-<?./<, ;<;,t!Q;;_,,,,
Company: /N �'/l"'7c
Signature
Print
Company:

Signature
Print
Company·.
. .
u.. -�
� ro t � � V 0
cl E ii G = 0 ;;; u C: c V 0.. u 'o .c: u.. w u.l :c c a. j3 "'
0 LJ LJ � "' � _g c >,
[:'. G:' <t'. = u a.
f-
If<
u.. 0 [J [J 0
f- u 6 � 2 2 V 0 �
cl 0 □ " :::i 3 ::i D
� (.J 0: 0 u
� u u 0
2 LJ w = :.c 0 0 + u D 1./ f- u a. 0
g
0 2 _c: � t:: u 0 Ci �
2 0 Ch 0
c2 V � 0 0 0
C, V .c: 6 0 0 c v IXi u u u w :r: LJ 0 □ CJ
X
7 DATE/TIME '\ RECEIVED BY
\\l�
Signature�,
Print ;--;,,}<.JI iw0"-7
1, j'?S Compan:,l','\,0 J, /, I,
Signature A,,,/
Print
Company:

Signature
Print
Company:

NOTE: By relinquishing samples to EMA, Inc., client agrees to pay for the services requested on this ('OC form and any additional analyses performed on this project. Payment for scrvi..:es is due within 30 day� from date of invoice. Sample� will he:: dispo�ed of 7 days af1er report has been finalized unless otherwise noted. All work is subject to EMA's tenns and conditions. esapea u1te - ego, 1onc
Reauested Analvsis -- - - .. C -- -- -- -- -- --,-
- '-- bf)
"
5 -'T
-
"
I " -- -
-
r,
-~"''
VJ ~
·-
- VJ
-
c-
I 0.
-- tj' ·- ·- 0..
cc
-- ---- ---
+
----
--
I I I
-- ----. I
- ~ -
I -
EnviroMatrix Analytical, Inc.

Interpipe Contracting, Inc.

Hope Elementary
Santee, CA 92071
10870 Hartley Road
Gary Hiebing
Enclosed are the results of analyses for samples received by the laboratory on 12/15/21 12:05. Samples were analyzed pursuant to client request utilizing EPA or other ELAP approved methodologies. I certify that this data is in compliance both technically and for completeness. 11 January 2022
Attn:

EMA Log #: 21L0667
Laboratory Director
Leland S. Pitt
CA ELAP Certification #: 2564
Project:
9590 Chesapeake Dr. - San Diego, California 92123 - (858) 560-7717 - Fax (858) 560-7763 Analytical Chemistry Laboratory
PLEASE NOTE OUR NEW LOCATION:

Project Name:

Interpipe Contracting, Inc.Client Name: EMA Log #: 21L0667 Hope Elementary
Sample ID Laboratory ID Matrix Date Sampled

ANALYTICAL REPORT FOR SAMPLES
Date Received
Nurses Sink 21L0667-01 12/15/21 10:59 12/15/21 12:05Drinking Water
Building A Staff Womens Bathroom 21L0667-02 12/15/21 11:19 12/15/21 12:05Drinking Water Building C Custodial 21L0667-03 12/15/21 11:05 12/15/21 12:05Drinking Water Classroom #10, Bldg. E 21L0667-04 12/15/21 11:02 12/15/21 12:05Drinking Water Classroom #29, Re-Locatable 21L0667-05 12/15/21 11:09 12/15/21 12:05Drinking Water Bldg. E Bathroom 21L0667-06 12/15/21 10:56 12/15/21 12:05Drinking Water Bldg. H Bathroom 21L0667-07 12/15/21 10:50 12/15/21 12:05Drinking Water Bldg. J Staff Bathroom 21L0667-08 12/15/21 11:14 12/15/21 12:05Drinking Water Bldg. J Drinking Fountain 21L0667-09 12/15/21 11:12 12/15/21 12:05Drinking Water Kitchen Prep Sink 21L0667-10 12/15/21 11:16 12/15/21 12:05Drinking Water Building G Bathroom 21L0667-11 12/15/21 11:30 12/15/21 12:05Drinking Water The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety.

Page 2 of 15 ends

EnviroMatrix Analytical, Inc.

Project Name:

Interpipe Contracting, Inc.Client Name: EMA Log #: 21L0667 Hope Elementary
Total Metals by EPA 200 Series Methods
Analyte Result MDL Limit
Reporting
Units Dilution Batch
Sample Prepared
Sample Analyzed Method Notes Analyst
Nurses Sink (21L0667-01) Drinking Wate
r Sampled: 12/15/21 10:59 Received: 12/15/21 12:05 2010642 01/06/22 08:38
01/11/22 12:24
mg/l 1 J0.044 0.006 0.050Zinc EPA 200.8icpms
"01/06/22 08:38
01/11/22 12:24
" ""Cadmium ND 0.0010.0002 icpms
"01/06/22 08:38
01/11/22 12:24
" ""Chromium ND 0.0500.0009 icpms
" 01/06/22 08:38
01/11/22 12:24
" "0.234 0.002 0.050Copper "icpms
"01/06/22 08:38
01/11/22 12:24
" ""Lead ND 0.0100.0008 icpms
" 01/06/22 08:38
01/11/22 12:24
" " J0.025 0.001 0.050Nickel "icpms
"01/06/22 08:38
01/11/22 12:24
" ""Silver ND 0.0050.0006 icpms
Building A Staff Womens Bathroom (21L0667-02) Drinking Water Sampled: 12/15/21 11:19 Received: 12/15/21 12:05 2010642 01/06/22 08:38
01/11/22 12:49
mg/l 1 J0.020 0.006 0.050Zinc EPA 200.8icpms
"01/06/22 08:38
01/11/22 12:49
" ""Silver ND 0.0050.0006 icpms
"01/06/22 08:38
01/11/22 12:49
" ""Nickel ND 0.0500.001 icpms
"01/06/22 08:38
01/11/22 12:49
" ""Lead ND 0.0100.0008 icpms
" 01/06/22 08:38
01/11/22 12:49
" "0.171 0.002 0.050Copper "icpms
"01/06/22 08:38
01/11/22 12:49
" ""Cadmium ND 0.0010.0002 icpms
"01/06/22 08:38
01/11/22 12:49
" ""Chromium ND 0.0500.0009 icpms
Building C Custodial (21L0667-03) Drinking Water Sampled: 12/15/21 11:05 Received: 12/15/21 12:05 EPA 200.801/06/22 08:38
01/11/22 12:51
mg/l 20106421Lead ND 0.0100.0008 icpms
"01/06/22 08:38
01/11/22 12:51
" ""Nickel ND 0.0500.001 icpms
"01/06/22 08:38
01/11/22 12:51
" ""Silver ND 0.0050.0006 icpms
"01/06/22 08:38
01/11/22 12:51
" ""Chromium ND 0.0500.0009 icpms
The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety.

Page 3 of 15 ends

EnviroMatrix Analytical, Inc.

Project Name:

Interpipe Contracting, Inc.Client Name: EMA Log #: 21L0667 Hope Elementary
Total Metals by EPA 200 Series Methods
Analyte Result MDL Limit
Reporting
Units Dilution Batch
Sample Prepared
Sample Analyzed Method Notes Analyst
Building C Custodial (21L0667-03) Drinking Wate
r Sampled: 12/15/21 11:05 Received: 12/15/21 12:05 EPA 200.801/06/22 08:38
01/11/22 12:51
mg/l 20106421Cadmium ND 0.0010.0002 icpms
" 01/06/22 08:38
01/11/22 12:51
" "0.074 0.002 0.050Copper "icpms
" 01/06/22 08:38
01/11/22 12:51
" " J0.015 0.006 0.050Zinc "icpms
Classroom #10, Bldg. E (21L0667-04) Drinking Water Sampled: 12/15/21 11:02 Received: 12/15/21 12:05 2010642 01/06/22 08:38
01/11/22 13:03
mg/l 10.214 0.006 0.050Zinc EPA 200.8icpms
"01/06/22 08:38
01/11/22 13:03
" ""Cadmium ND 0.0010.0002 icpms
"01/06/22 08:38
01/11/22 13:03
" ""Chromium ND 0.0500.0009 icpms
" 01/06/22 08:38
01/11/22 13:03
" 21.94 0.005 0.100Copper "icpms
" 01/06/22 08:38
01/11/22 13:03
" 1 J0.002 0.0008 0.010Lead "icpms
" 01/06/22 08:38
01/11/22 13:03
" " J0.005 0.001 0.050Nickel "icpms
"01/06/22 08:38
01/11/22 13:03
" ""Silver ND 0.0050.0006 icpms
Classroom #29, Re-Locatable (21L0667-05) Drinking Water Sampled: 12/15/21 11:09 Received: 12/15/21 12:05 2010642 01/06/22 08:38
01/11/22 13:05
mg/l 10.109 0.006 0.050Zinc EPA 200.8icpms
"01/06/22 08:38
01/11/22 13:05
" ""Silver ND 0.0050.0006 icpms
" 01/06/22 08:38
01/11/22 13:05
" " J0.004 0.001 0.050Nickel "icpms
" 01/06/22 08:38
01/11/22 13:05
" " J0.002 0.0008 0.010Lead "icpms
" 01/06/22 08:38
01/11/22 13:05
" "0.225 0.002 0.050Copper "icpms
"01/06/22 08:38
01/11/22 13:05
" ""Cadmium ND 0.0010.0002 icpms
"01/06/22 08:38
01/11/22 13:05
" ""Chromium ND 0.0500.0009 icpms
Bldg. E Bathroom (21L0667-06) Drinking Water Sampled: 12/15/21 10:56 Received: 12/15/21 12:05 The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety.

Page 4 of 15 ends

EnviroMatrix Analytical, Inc.

Project Name:

Interpipe Contracting, Inc.Client Name: EMA Log #: 21L0667 Hope Elementary
Total Metals by EPA 200 Series Methods
Analyte Result MDL Limit
Reporting
Units Dilution Batch
Sample Prepared
Sample Analyzed Method Notes Analyst
Bldg. E Bathroom (21L0667-06) Drinking Wate
r Sampled: 12/15/21 10:56 Received: 12/15/21 12:05 2010642 01/06/22 08:38
01/11/22 13:07
mg/l 1 J0.044 0.006 0.050Zinc EPA 200.8icpms
" 01/06/22 08:38
01/11/22 13:07
" " J0.002 0.0008 0.010Lead "icpms
"01/06/22 08:38
01/11/22 13:07
" ""Cadmium ND 0.0010.0002 icpms
" 01/06/22 08:38
01/11/22 13:07
" "0.453 0.002 0.050Copper "icpms
" 01/06/22 08:38
01/11/22 13:07
" " J0.004 0.001 0.050Nickel "icpms
"01/06/22 08:38
01/11/22 13:07
" ""Silver ND 0.0050.0006 icpms
"01/06/22 08:38
01/11/22 13:07
" ""Chromium ND 0.0500.0009 icpms
Bldg. H Bathroom (21L0667-07) Drinking Water Sampled: 12/15/21 10:50 Received: 12/15/21 12:05 EPA 200.801/06/22 08:38
01/11/22 13:09
mg/l 20106421Chromium ND 0.0500.0009 icpms
"01/06/22 08:38
01/11/22 13:09
" ""Cadmium ND 0.0010.0002 icpms
" 01/06/22 08:38
01/11/22 13:09
" "0.329 0.002 0.050Copper "icpms
"01/06/22 08:38
01/11/22 13:09
" ""Lead ND 0.0100.0008 icpms
" 01/06/22 08:38
01/11/22 13:09
" " J0.001 0.001 0.050Nickel "icpms
"01/06/22 08:38
01/11/22 13:09
" ""Silver ND 0.0050.0006 icpms
" 01/06/22 08:38
01/11/22 13:09
" " J0.013 0.006 0.050Zinc "icpms
Bldg. J Staff Bathroom (21L0667-08) Drinking Water Sampled: 12/15/21 11:14 Received: 12/15/21 12:05 2010642 01/06/22 08:38
01/11/22 13:11
mg/l 1 J0.005 0.001 0.050Nickel EPA 200.8icpms
" 01/06/22 08:38
01/11/22 13:11
" " J0.016 0.006 0.050Zinc "icpms
"01/06/22 08:38
01/11/22 13:11
" ""Cadmium ND 0.0010.0002 icpms
"01/06/22 08:38
01/11/22 13:11
" ""Chromium ND 0.0500.0009 icpms
The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety.

Page 5 of 15 ends

EnviroMatrix Analytical, Inc.

Project Name:

Interpipe Contracting, Inc.Client Name: EMA Log #: 21L0667 Hope Elementary
Total Metals by EPA 200 Series Methods
Analyte Result MDL Limit
Reporting
Units Dilution Batch
Sample Prepared
Sample Analyzed Method Notes Analyst
Bldg. J Staff Bathroom (21L0667-08) Drinking Wate
r Sampled: 12/15/21 11:14 Received: 12/15/21 12:05 2010642 01/06/22 08:38
01/11/22 13:11
mg/l 10.123 0.002 0.050Copper EPA 200.8icpms
"01/06/22 08:38
01/11/22 13:11
" ""Silver ND 0.0050.0006 icpms
"01/06/22 08:38
01/11/22 13:11
" ""Lead ND 0.0100.0008 icpms
Bldg. J Drinking Fountain (21L0667-09) Drinking Water Sampled: 12/15/21 11:12 Received: 12/15/21 12:05 EPA 200.801/06/22 08:38
01/11/22 13:13
mg/l 20106421Nickel ND 0.0500.001 icpms
"01/06/22 08:38
01/11/22 13:13
" ""Lead ND 0.0100.0008 icpms
"01/06/22 08:38
01/11/22 13:13
" ""Zinc ND 0.0500.006 icpms
"01/06/22 08:38
01/11/22 13:13
" ""Chromium ND 0.0500.0009 icpms
"01/06/22 08:38
01/11/22 13:13
" ""Cadmium ND 0.0010.0002 icpms
" 01/06/22 08:38
01/11/22 13:13
" "0.296 0.002 0.050Copper "icpms
"01/06/22 08:38
01/11/22 13:13
" ""Silver ND 0.0050.0006 icpms
Kitchen Prep Sink (21L0667-10) Drinking Water Sampled: 12/15/21 11:16 Received: 12/15/21 12:05 EPA 200.801/06/22 08:38
01/11/22 13:15
mg/l 20106421Chromium ND 0.0500.0009 icpms
" 01/06/22 08:38
01/11/22 13:15
" " J0.007 0.001 0.050Nickel "icpms
"01/06/22 08:38
01/11/22 13:15
" ""Cadmium ND 0.0010.0002 icpms
" 01/06/22 08:38
01/11/22 13:15
" " J0.001 0.0008 0.010Lead "icpms
" 01/06/22 08:38
01/11/22 13:15
" "1.47 0.006 0.050Zinc "icpms
"01/06/22 08:38
01/11/22 13:15
" ""Silver ND 0.0050.0006 icpms
" 01/06/22 08:38
01/11/22 13:15
" 21.94 0.005 0.100Copper "icpms
Building G Bathroom (21L0667-11) Drinking Water Sampled: 12/15/21 11:30 Received: 12/15/21 12:05 2010642 01/06/22 08:38
01/11/22 13:17
mg/l 1 J0.004 0.001 0.050Nickel EPA 200.8icpms
The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety.

Page 6 of 15 ends

EnviroMatrix Analytical, Inc.

Project Name:

Page 7 of 15 ends

EnviroMatrix Analytical, Inc.

Project Name:

Interpipe Contracting, Inc.Client Name: EMA Log #: 21L0667 Hope Elementary
Conventional Chemistry Parameters by Standard/EPA Methods Analyte Result MDL Limit
Reporting
Units Dilution Batch
Sample Prepared
Sample Analyzed Method Notes Analyst
Nurses Sink (21L0667-01) Drinking Wate
r Sampled: 12/15/21 10:59 Received: 12/15/21 12:05 SM2120 B12/16/21 08:00
12/16/21 08:00
Color
Units
11216581Color ND 11 EC
SM2150 B12/16/21 08:00
12/16/21 08:00
T.O.N. 1121659"Threshold Odor Number ND 1.01.0 EC
Building A Staff Womens Bathroom (21L0667-02) Drinking Water Sampled: 12/15/21 11:19 Received: 12/15/21 12:05 SM2120 B12/16/21 08:00
12/16/21 08:00
Color
Units
11216581Color ND 11 EC
SM2150 B12/16/21 08:00
12/16/21 08:00
T.O.N. 1121659"Threshold Odor Number ND 1.01.0 EC
Building C Custodial (21L0667-03) Drinking Water Sampled: 12/15/21 11:05 Received: 12/15/21 12:05 SM2120 B12/16/21 08:00
12/16/21 08:00
Color
Units
11216581Color ND 11 EC
SM2150 B12/16/21 08:00
12/16/21 08:00
T.O.N. 1121659"Threshold Odor Number ND 1.01.0 EC
Classroom #10, Bldg. E (21L0667-04) Drinking Water Sampled: 12/15/21 11:02 Received: 12/15/21 12:05 1121658 12/16/21 08:00
12/16/21 08:00
Color
Units
117 1 1Color SM2120 BEC
1121659 12/16/21 08:00
12/16/21 08:00
T.O.N. "4.0 1.0 1.0Threshold Odor Number SM2150 BEC
Classroom #29, Re-Locatable (21L0667-05) Drinking Water Sampled: 12/15/21 11:09 Received: 12/15/21 12:05 1121658 12/16/21 08:00
12/16/21 08:00
Color
Units
120 1 1Color SM2120 BEC
1121659 12/16/21 08:00
12/16/21 08:00
T.O.N. "4.0 1.0 1.0Threshold Odor Number SM2150 BEC
Bldg. E Bathroom (21L0667-06) Drinking Water Sampled: 12/15/21 10:56 Received: 12/15/21 12:05 1121658 12/16/21 08:00
12/16/21 08:00
Color
Units
117 1 1Color SM2120 BEC
1121659 12/16/21 08:00
12/16/21 08:00
T.O.N. "4.0 1.0 1.0Threshold Odor Number SM2150 BEC
Bldg. H Bathroom (21L0667-07) Drinking Water Sampled: 12/15/21 10:50 Received: 12/15/21 12:05 1121658 12/16/21 08:00
12/16/21 08:00
Color
Units
13 1 1Color SM2120 BEC
1121659 12/16/21 08:00
12/16/21 08:00
T.O.N. "2.0 1.0 1.0Threshold Odor Number SM2150 BEC
The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety.

Page 8 of 15 ends

EnviroMatrix Analytical, Inc.

Project Name:

Page 9 of 15 ends

EnviroMatrix Analytical, Inc.

Project Name:

Interpipe Contracting, Inc.Client Name: EMA Log #: 21L0667 Hope Elementary
Microbiological Parameters by Standard Methods
Analyte Result MDL Limit
Reporting
Units Dilution Batch
Sample Prepared
Sample Analyzed Method Notes Analyst
Nurses Sink (21L0667-01) Drinking Wate
r Sampled: 12/15/21 10:59 Received: 12/15/21 12:05 SM922312/15/21 15:28
12/16/21 15:55
None 11216451Total Coliforms Absent CC
"12/15/21 15:28
12/16/21 15:55
" ""E. Coli Absent CC
Building A Staff Womens Bathroom (21L0667-02) Drinking Water Sampled: 12/15/21 11:19 Received: 12/15/21 12:05 SM922312/15/21 15:28
12/16/21 15:55
None 11216451Total Coliforms Absent CC
"12/15/21 15:28
12/16/21 15:55
" ""E. Coli Absent CC
Building C Custodial (21L0667-03) Drinking Water Sampled: 12/15/21 11:05 Received: 12/15/21 12:05 SM922312/15/21 15:28
12/16/21 15:55
None 11216451Total Coliforms Absent CC
"12/15/21 15:28
12/16/21 15:55
" ""E. Coli Absent CC
Classroom #10, Bldg. E (21L0667-04) Drinking Water Sampled: 12/15/21 11:02 Received: 12/15/21 12:05 SM922312/15/21 15:28
12/16/21 15:55
None 11216451Total Coliforms Absent CC
"12/15/21 15:28
12/16/21 15:55
" ""E. Coli Absent CC
Classroom #29, Re-Locatable (21L0667-05) Drinking Water Sampled: 12/15/21 11:09 Received: 12/15/21 12:05 SM922312/15/21 15:28
12/16/21 15:55
None 11216451Total Coliforms Absent CC
"12/15/21 15:28
12/16/21 15:55
" ""E. Coli Absent CC
Bldg. E Bathroom (21L0667-06) Drinking Water Sampled: 12/15/21 10:56 Received: 12/15/21 12:05 SM922312/15/21 15:28
12/16/21 15:55
None 11216451Total Coliforms Absent CC
"12/15/21 15:28
12/16/21 15:55
" ""E. Coli Absent CC
Bldg. H Bathroom (21L0667-07) Drinking Water Sampled: 12/15/21 10:50 Received: 12/15/21 12:05 SM922312/15/21 15:28
12/16/21 15:55
None 11216451Total Coliforms Absent CC
"12/15/21 15:28
12/16/21 15:55
" ""E. Coli Absent CC
The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety.

Page 10 of 15 ends

EnviroMatrix Analytical, Inc.

Project Name:

Page 11 of 15 ends

EnviroMatrix Analytical, Inc.

Project Name:

Interpipe Contracting, Inc.Client Name: EMA Log #: 21L0667 Hope Elementary
Result Limit
Reporting
Units Level
Spike
Result
Source
%REC
%REC
Limits RPD
RPD
Limit Notes Analyte
Total Metals by EPA 200 Series Methods - Quality Control MDL Analyst
Batch 2010642
Blank (2010642-BLK1) Prepared: 01/06/22 Analyzed: 01/11/22 Cadmium mg/l0.001ND 0.0002 icpms
Chromium "0.050ND 0.0009 icpms
Copper "0.050ND 0.002 icpms
Lead "0.010ND 0.0008 icpms
Nickel "0.050ND 0.001 icpms
Silver "0.005ND 0.0006 icpms
Zinc "0.050ND 0.006 icpms
LCS (2010642-BS1) Prepared: 01/06/22 Analyzed: 01/11/22 Chromium mg/l 0.100 106 85-
1150.0500.106 0.0009 icpms
Zinc " 0.100 109 85-1150.0500.109 0.006 icpms
Silver " 0.100 98 85-1150.0050.098 0.0006 icpms
Nickel " 0.100 106 85-1150.0500.106 0.001 icpms
Copper " 0.100 106 85-1150.0500.106 0.002 icpms
Cadmium " 0.100 106 85-1150.0010.106 0.0002 icpms
Lead " 0.100 101 85-1150.0100.101 0.0008 icpms
LCS Dup (2010642-BSD1) Prepared: 01/06/22 Analyzed: 01/11/22 Zinc mg/l 0.100 106 85-115 3 200.0500.106 0.006 icpms
Copper " 0.100 105 85-115 2 200.0500.105 0.002 icpms
Chromium " 0.100 104 85-115 1 200.0500.104 0.0009 icpms Lead " 0.100 100 85-115 0.8 200.0100.100 0.0008 icpms
Nickel " 0.100 104 85-115 2 200.0500.104 0.001 icpms
Silver " 0.100 98 85-115 0.3 200.0050.098 0.0006 icpms
Cadmium " 0.100 105 85-115 0.6 200.0010.105 0.0002 icpms Duplicate (2010642-DUP1) Prepared: 01/06/22 Analyzed: 01/11/22 Source: 21L0525-01 Chromium mg/l ND 200.050ND 0.0009 icpms
Copper " 0.021 6 20 J0.0500.019 0.002 icpms
Lead " ND 200.010ND 0.0008 icpms
Nickel " ND 200.050ND 0.001 icpms
Silver " ND 200.005ND 0.0006 icpms
Cadmium " 0.0003 12 20 J0.0010.0002 0.0002 icpms
Zinc " 0.007 6 20 J0.0500.008 0.006 icpms
The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety.

Page 12 of 15 ends

EnviroMatrix Analytical, Inc.

Project Name:

Interpipe Contracting, Inc.Client Name: EMA Log #: 21L0667 Hope Elementary
Result Limit
Reporting
Units Level
Spike
Result
Source
%REC
%REC
Limits RPD
RPD
Limit Notes Analyte
Total Metals by EPA 200 Series Methods - Quality Control MDL Analyst
Batch 2010642
Matrix Spike (2010642-MS1) Prepared: 01/06/22 Analyzed: 01/11/22 Source: 21L0525-01 Chromium mg/l 0.100 ND 97 70-1300.0500.097 0.0009 icpms Silver " 0.100 ND 92 70-1300.0050.092 0.0006 icpms
Nickel " 0.100 ND 94 70-1300.0500.094 0.001 icpms
Copper " 0.100 0.021
94 70-1300.0500.114 0.002 icpms
Zinc " 0.100 0.007 98 70-1300.0500.105 0.006 icpms
Cadmium " 0.100 0.0003 99 70-1300.0010.099 0.0002 icpms Lead " 0.100 ND 103 70-1300.0100.103 0.0008 icpms
Matrix Spike (2010642-MS2) Prepared: 01/06/22 Analyzed: 01/11/22 Source: 21L0667-01 Zinc mg/l 0.100 0.044 100 70-1300.0500.144 0.006 icpms
Cadmium " 0.100 ND 100 70-1300.0010.100 0.0002 icpms
Copper " 0.100 0.234 79 70-1300.0500.313 0.002 icpms
Chromium " 0.100 ND 98 70-1300.0500.098 0.0009 icpms
Lead " 0.100 ND 100 70-1300.0100.100 0.0008 icpms
Nickel " 0.100 0.025 95 70-1300.0500.119 0.001 icpms
Silver " 0.100 ND 93 70-1300.0050.093 0.0006 icpms
Matrix Spike Dup (2010642-MSD1) Prepared: 01/06/22 Analyzed: 01/11/22 Source: 21L0525-01 Silver mg/l 0.100 ND 92 70-130 0.1 200.0050.092 0.0006 icpms Nickel " 0.100 ND 93 70-130 1 200.0500.093 0.001 icpms
Lead " 0.100 ND 100 70-130 3 200.0100.100 0.0008 icpms
Copper " 0.100 0.021 93 70-130 0.6 200.0500.113 0.002 icpms Cadmium " 0.100 0.0003 99 70-130 0.3 200.0010.099 0.0002 icpms Zinc " 0.100 0.007 97 70-130 0.7 200.0500.104 0.006 icpms Chromium " 0.100 ND 96 70-130 0.3 200.0500.096 0.0009 icpms The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety.

Page 13 of 15 ends

EnviroMatrix Analytical, Inc.

Project Name:

Interpipe Contracting, Inc.Client Name: EMA Log #: 21L0667 Hope Elementary
Result Limit
Reporting
Units Level
Spike
Result
Source
%REC
%REC
Limits RPD
RPD
Limit Notes Analyte
Conventional Chemistry Parameters by Standard/EPA Methods - Quality Control MDL Analyst
Batch 1121658
Duplicate (
1121658-DUP1) Prepared & Analyzed: 12/16/21 Source: 21L0696-01 Color Color
Units
ND 201ND 1 EC
Reference (1121658-SRM1) Prepared & Analyzed: 12/16/21
Color Color
Units

50.0 98 80-120149 1 EC
Batch 1121659
Blank (1121659-BLK1) Prepared & Analyzed: 12/16/21
Threshold Odor Number T.O.N.1.0ND 1.0 EC
Duplicate (1121659-DUP1) Prepared & Analyzed: 12/16/21 Source: 21L0696-01 Threshold Odor Number T.O.N. ND 201.0ND 1.0 EC
The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety.

Page 14 of 15 ends

EnviroMatrix Analytical, Inc.

Project Name:

Interpipe Contracting, Inc.Client Name: EMA Log #: 21L0667 Hope Elementary
Notes and Definitions
J Detected but below the Reporting Limit; therefore, result is an estimated concentration (CLP J-Flag).

A-03 Absent
Sample results reported on a dry weight basis (if indicated in units column) Relative Percent DifferenceRPD
dry
Not ReportedNR
Analyte NOT DETECTED at or above the reporting limit (or method detection limit when specified)ND MDL Method detection limit (indicated per client's request) The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety.

Page 15 of 15 ends

EnviroMatrix Analytical, Inc.
'l\ L ot,6 7

CHAIN-OF-CUSTODY RECORD
EMA LOG#:

Client tiQ{>c.,_ r,d ¥ w\t'JA�'-4 / r;:_fil.,';,Cv'\ \:k.l \ Attn: l((l.f\j \�;o,,; ..,•u,
Sarnl'_l_crs(;;_) '.\t._� \�.'-I
Address: I
Phone: Fax:

Erna i I: C':!.._'\,._1 �\ 1/1.JJ\.N 11,\t��\tit'., L\- i .�rllL_tJ..\£"'- Billing Aa'dress: '
Project ID:

Project#: l<\f'JO� f \�t.>l\.\rw''-t
IIJ/1 Client Sample ID
Nv,se':i____si�\\i...

PO#:

Sample
Date
o.hs
2 _nu1r).;1,'_� A Sh"� !t'c.v4:1,1 s � �ft,j,"\
3 4
5 6
7 8
9 10
�'v\� l.c_ 'S�f .-Jf,fbi<,,_ {,Vc�«Ji'iil\
f✓$)S�M)CII"'- 1t I� �\d,�- 'E
LLlfi:i5r!lL'�.-.. �'2�, . (1...e -lou.,,+t--1:>'t-e .
l;iAo. �..r>�""''
f;\�61- H �.,.,$1:o" .. ,.m:· ft:�,111�,,:o•-&J"-Ni-�
£'\.� <) - il-..\'.J �\--"'\'!it,sV\
&\I\\ .:s - �'"""''"'·'. f---01,,>',\t-,.'v",
�\ t� � f1� �iv\.lt....

Sample
Time
\�'\
\\\'
Ho:-..
\\'{J1..
1\oq
iOS\o
lDS<)
\1"1
WJ,
111\.,
Sample
Matrix
i)IJ
•
-EnviroMatrix Analytical, Inc.
9590 Chesapeake Dr. Suite 5 San Diego, CA 92123 - Phone (619) 474-8548 Requested Analysis " u 0. OD
ro
g -l z I-
(/)
·,-, □
0 5 7
f.:'. u sC w -l sC C'.i M □ I-- ;: :r: I- � I-n w :;;: c z 7 [J C'I lJ 0 □ ::,:
"' w :r:
'-- "'
� >< V) LJ "' ;:;: I- t: Cl u "' I-□ 0 co z 2 □ □ z I'-- M ::l V) □ - .,, u.. v V)
7 C:
0 I- 8 <( ,2; u > □ :� v □ 0 V) ,.:., 1)
> � z .,,
:i: u N ro � 0 w n 1J
� 0... 0 "' u t::
sC N i= N oc
.� Container I � <r, 00 :r: v
c ;;,c </) 0. z <( N r-, # I Type O oc sC sC LI u
1P
'
.,,
B" ;;;:
□
"O " .2::
� 0
n
fi'
� 0...
<�
ci:: u u ci:: �
� u 0...
-l -V r,_, I-
:1:::.
�
::b
·i_
c::-
1-
2 B"' u..
u..

I
;;:
:s �
□
E
@
0 v
"
-
�
§
w..;
�
C
-.)
w..:
§ :2
:..,
"'
0 c5

1.£
I .:t
1,t
"'
l"f--
-,....
'I-.
'{.,
i--
-i
t 1J
2 8
cil□
u..

I
?
□
v; ::l " "
8 3
ci:l
u 0...
:c
§
0 v
2 "" 0::
-�
-§..
;co
2 2 " :r:
"'c:2
C
"'
;o.,
u
0 C u
□
,..,
0co
[]
.f'
-c
� �
[7
0 ·,:,
C
!(_
...,
' "
'\
I'£
l'i..
1 0 ..c 0.
1t: 0
[J
.,,
� ..c
� 0
t:
□
2 �
}
" � �
c5
Page_lof �2
t\fatrix Codes: A= \ir. D\V---=-- Drinking Water. C..JW - (.iroundv,,ah:r_ S\\ _cc Storm \Vati.:r W\V-"--- Wastewater, S -=-- Soil. SED '-'- Sediment, SD - Solid, T = Tissue. 0--= Oil. L = Liquid RELINQll(SHED BY DATE/TIME RE<,;f: . .LW'D B�
Shipped B�: __g Courier r I UPS J FedE,\ , J USPS . ..., Client Drop Off I Othl'r 1Turn-Around-Timc: u Same Day c_J I day 2 day u 3 <lay : ➔ day ,J 5 day 4.._STD (7-busmess days) 'Reporting Re,111irements: Jl.Plll· c Excel,, (ieotraekeriEIJF c! I lard l'opy c! Li)f/('I.IP c; ('EDEN,, SDWIS 1 Sample Disposal: �By Laboratory :Return to Client: P/L or Dclnery ,\rchive Sample Integrity
Correct Con tamers:_� No Ni A Conlaincrs Properly Pre:-icved: _ft No Ni A Custody Seals Intact: Yes No � Temp (w RcccipL ___/;.�
COC/Labcls ;\�rec: f1 No N:i\ Sampkd By: Client �) Autosampler Pro_jcct/Samplc Location/Address: ""
ProJect/Sample Comments:
:fJM1� ½i..1/11\Pl� Tt'VJte,, l __k�v.r 1 Additional co:-ih may apply. Plca�c note there is a S�.5 minimum charge for al! clients. :EMA reserves the right to return any sdmpks that do not match our waste profile.

Signature \_,,.,..j(�·
Print ,:,.::>� .. /Ja(';J,: �f'1 "(
Company: h__Vl ,4
Signature
Print
Company:

Signature
Print
Company:
n,/,sh.1
1'!0')
Print
Company: � lA,A,_
S1g:natun:

Print
Comp,my:

Signature
Print
('ompany:

S..-rle.s ) -\\'. L\l:k:,, (J)\01'6"J, c�f,r
1 e'.f;, iAo <>c\,J<:,
NOTE: By relinquishing samples to EMA. Inc., client agrees to pay for the services requested on tlrn, COC ror111 and any additional analyse� pcrfrmned on this project. Payment for sen ices is due within 30 days ti·orn dale or 1m 01cc. Sump!es \\ i!I he L11spo:-icd of 7 days after report has been finali1ed unks� otherwise noted. All work is subject to EM A's terms and conditions.

I
I
I ' '
I i " I
X -
" I c·
I
~
~ '-' - -c.. CJ

I - I ,, -
~
, ~
--
I '"""'. = ., [7
- 2
I
~
-- I u - - ,-,
--r-- [J .::: C.
;;;
.2 ~
C ~
-- 0
l'J [] ~ ~
1 I - 'I---
;
'-1. ... '■ 1 I l I• .:J
I --1-
I
L -./...

I -1.- ' ,
I ,,_ '
"'
" - ' - -.. I I I I I I I I ',
I I I I I I I I I '" I I I I I I I I I ·..t
I ..,, ' J I I I I I
•
I
I _, ISignature,:;;:;,-c"""~-----
I I - '"
,:.=ti'\ ! ~
I
,_ -- I -

CHAIN-OF-CUSTODY RECORD
'LjL·D bb 7 Page _2_ of "'t_
- EnviroMatrix Analytical, Inc.

EMA LOG#:
9590Chesapcakc Dr. Suitc5-San Diego, CA 92123-Phonc (619)474-8548 Client: -1\�e r:.\t•,M;,,\1\\{,./,'-1 l:r:r,�S\' .. "-
Attn: kr.J'-1 \.\t:,\t,,.,._
SamJ_Jl_ers(s): �\... �'"''
Address: 1
Phone:

Email:

Billing Address:
l\r�\
Fax:
tj-0 -0
□
N
,.,-,
tj
□
� CJ..)
lJ
�"
i:5
□
1-----------------------------------------t M
Cf.
"" Project llJ:

Project#:
[l)t/ Client Sample ID
_i:::,. �
=----�"VI--\ \ Q-.)
2 �J4!'� &,tl,rucvj
3 4
6 7
8 9
10 PO#:

Sample
Date
IJ.d.D..
cl1s
Sample
Time
ll�u
l\latrix Code�: A-=-- Air, DW = Dnnkmg Water. (i\\. -Ciround\\ atcr, S\V Stm111 Water \V\V ·:..._ Wastewater, S = SoiL SED = Sediment_ SD c- Solid, T = Tissue, 0 = Oil. L - Liquid Sample
Matrix
.!&:! bw
Container
# I Type
2'
,_S{l
tj-
□ G
lJ
� Cl
�
!-
'<l
0 �
Signature
Q, "" z
>. X
0 CJ..)
CD
!
;:;:

CJ..)
><!
CD
ti:
v
0 >
0 -0 N oc
� N '°
2:�
g
:c
�

1.-i
C
� �
::2 N oc
•n
N '°
"'' :c
1/.
n
VJ
0 !-
□
VJ VJ
!-
□
v
Ll.)
[J
� C,
n
V
bl!
.�
z
.8
�
□
z
;L
!
:J
4 z
□
:� z
[J
8 -
�
z
□
c.., ,_J
!V)
n
u ,_J
!
!
Cl
,r.
"
CJ
;:;:
c-
;:;:
<(
u
;::, 01
V
�
c..,
<(
c..,
R.tL.!tJQUJSHED BY
� ,/
/
Requested Analysis
-a 1J >
] 0
r;:;,
�t
""' zL.
[_J ....c 0..
-< ::;
ex::: ·�u
x
g�i
� -
p(
i==
;:;:
ci CJ " !-
!!-
6 .8
�
LI
e 2
0 u
c.;
<
,-_,
0 v
�
0 v
"
0 _;
0 v
�
K
t'.
..:c!
8 C w
LJ
u...
!
;:;:

Cf. ::, CJ u G CJ
2 B Cu.)
� :c
C ::, G
u
B "' a:
.� ..c: Q,
2 0
t
" :c
CJ
:-'3C cl >,
v
!J
0 0
v
[J
0 0 CD
□
-·---�

DATE/TIME
Shipped By: tiL_Courier . � UPS '.J FedE,\ i_; USPS Client Drop Off I Other Print � :Te"� f'enilv rzhs/7,1 l'l-'O 5,, 1Turn-Around-Time: r I Sarne Da) '._J ! day 2 day ,, > Jay u 4 day , J) day 1.A._STD ( 7-busincss days) 'Reporting Requirements: ,(PDF _j Excel_, Cirntracker:EDF Hard Cop),: EDT/CLIP,, CEDEN , SDWIS 1s�rn1ple Dispos:11: ftl By Laboratory 2Rr.::turn to Client: P/U or l)r.::livcry '._1 Archi\'c Sample integrity
Correct Containers: '(cj_ Nn Ni r\ Conlarners Properly Prescved -·�- No N-'A Cu:::.tody Seals lntact:\·t.'s No N@ remp Receipt: __ ____J;)__�_ 5'.:::_ __ COC/Lahels Agree: 'f-5} No Nu\ Sampled By: Client E@ Autosampler Project/Sample Location/Address:

Project/Sample Comments:
1 Add1tio1rnl costs may apply. l>Jcase note there i:i a $3) minimum clrnrge for all client:,. ::.EMA reserves the right to return any samples that do not match our waste pro/'ilc. ('ornpany: <f-_;,Mt4-
Signature
Print
('ompany:

Signature
Prmt
Company:
.£-0
�
�
LJ
� G -0
0 ,ii
"-
2 G
�
''f-
}Z_
B "" ..c:
�
0 � C ..c:
t'.
0 ,-,
,r.
2 s
� Q ..c: 0..
[J
B
:2
J
"
� 2
G
ru:eETVED sy"'�
Signaturs,/ - , . ., .. �v::::_.· . .,�-�
Print L l>J\_ ,N _\L,\ ,.

Comrany: ��
Sigrnlture
Print
Company:

Signature
Print
Company:

NOTE: By relinqui�hing samples to EMA, Inc., client agrees to pay for thc services requested on this COC form and any additional analy:,t.>s performed on thi:::. project. Payment ror sen1cc:::. is due vv1thin 30 days from Jate of imoicc. Samples \\'ii! he dispo:ied nf 7 days an.er report has been finalized un!e:is otherwise noted. Al! V\Ork is subject to EM A's terms and condition:::.. 1-1-,-rrr1 1 rrrrrrr-r- .-r-
- ...- ......- .-- .-- r--- ,-- r--- ...- -
u,
1--1-1- 1-1-1-1--1-1 I I I I 11 I
1-1-1-1--1-1 I I I I 11 I 1--
1-1-1-1--1-1 I I I I I I I
1-1-1-1--1-1 I I I I I I I
.-e-H-e-H-H-~: : : :: 111111 115 ,"'" ~~ :
. I L .

II
k
0 i--1-1--l--1-1--1--1--L-1,
I Ii
ilcr T I I iform"""' Ii p,, L-1 11umerat10n
ro
t(

I I I I I I I I I
l--1-1--ll--1-1--IID--- I
I I I I I I 1-1-1--1-~--------------i
I
I I I I I 1-1-f-l--1-~--------------i
I I I I I 1-1-f-l--1-~--------------i
-1-1-1-1-1-1-1--11--1--+----------------------i
-1-1-1-1-1-l-1--1-4--1----------------------i
-1-1-1-1-1-l-1--1-4--1----------------------i
-1-1-1-1-1-l-1--1-4--1----------------------i
.__ ____ ...___1_1_ 1-1-.111....-L-1 •. 1-1-1-•-•-•-•-1-.L.-1-..L-'-----------------------'

WA TER TR EA TM ENT

S E R V I C E R E P O R T
February 25, 2022 | Page 1 of 1
Jeff Modglin

YOUR CLEAR WATER TECHNOLOGIES REPRESENTATIVE
Jeff Modglin | 619.861.0900 | [email protected] 2220 Otay Lakes Road, Suite 502-107, San Diego, CA 91915

CLIENT INFO SERVICE ADDRESS SITE CONTACTS
Company: Carlsbad Unified School District
Account No.:

PO No.:

Hope Elementary School
3010 Tamarack Avenue
Carlsbad, CA 92010
system type Domestic Water
work performed Analytical Testing
Attention: Derrick Anderson
[email protected]
Copy:

INVENTORY

WATER ANALYSIS
Sample # System ID Cond pH P-ALK M-ALK CL TH PO4
1 City Water 532 8.1 0 60 60 110 0
2 Reclaimed Water 1603 7.0 0 160 180 230 5.4
3 Kitchen Prep Sink #1 562 7.9 0 70 70 140 0.3
4 Kitchen Prep Sink #2 1533 7.2 0 140 150 220 5.2
5 Boy’s Rest Room Sink 1576 7.0 0 160 160 230 5.3
6 Storage Room Sink 1537 7.1 0 140 150 230 5.2
7 Kindergarten Classroom Sink 523 8.1 0 60 60 110 0
SYSTEM STATUS | ACTIONS | RECOMMENDATIONS

1. “City Water” taken from backflow device at street.

2. “Reclaimed Water” sample taken from landscape sprinkler system. (PO4: Phosphate)

3. “Kitchen Prep Sink #1” was cold water taken immediately without running any water since yesterday afternoon.

4. “Kitchen Prep Sink #2” was cold water taken after 5-6 minutes of continuous running.

5. “Boy’s Rest Room Sink” was cold water taken after <1 minute of continuous running.

6. “Storage Room Sink” was cold water taken after <1 minute of continuous running.

7. “Kindergarten Classroom Sink” was cold water taken after 7-8 minutes of continuous running. / i CLEAR ~((WATER ~ J,.ECHNOLOGIES™
Incident Report – Hope Elementary School, 3010 Tamarack Ave, Carlsbad, CA 92010 Mar. 15, 2022

ATTACHMENT C
1 Jeanette Brown
Subject: FW: Hope Elementary - RW Cross Connection
From: Sterchi, Sean@Waterboards <[email protected]> Sent: Thursday, February 24, 2022 12:14 PM
To: Eric Sanders <[email protected]>
Cc: McCullough, Jamelle <[email protected]>; Ertas, Tuba@Waterboards <[email protected]>; [email protected] Subject: [External] Hope Elementary ‐ RW Cross Connection Eric,
Carlsbad MWD must take the following additional actions:

1. Submit plan for how students’ parents will be notified. If there have been any visitors to the school, a plan to notify them as well must be submitted. Submit copy of notification language to DDW for approval.

2. Submit test cert for RP device from 2/24/2022 test by COB today 2/24/2002.

3. Flushing, disinfection and bacteriological confirmation testing of the onsite plumbing following AWWA pipeline disinfection procedures – submit results to DEHQ and DDW

4. Submit as‐built use site plans (PW & RW properly annotated) clarif ying what plumbing changes have been made, both that resulted in the cross connection and the necessary plumbing corrections.

5. 2‐way full cross connection test must be performed (to be witnessed by DEHQ).

6. Confirm that the school will remain closed (or alternative water provided for all human consumption purposes) until DDW approves of the corrective actions taken an
d water quality results to reopen the school.

7. Incident report by March 4th, 2022. Include documentation for the initial shutdown testing performed when RW was activated for the use site.

Jamelle,
As discussed, please confirm DEHQ’s plan to do a press release.

Thanks
Sean
Incident Report – Hope Elementary School, 3010 Tamarack Ave, Carlsbad, CA 92010 Mar. 15, 2022

ATTACHMENT D
1 30
-0
1OVERALL SITE PLAN
SCALE: 1 30
-0

TAMARACK AVENUE

WILSHIRE
AVENUE
E;ISTING

BUILDING A
A 4778

A 04-10

E;ISTING

BUILDING B

KINDERGARTEN
A 4778

A 04-10

E;ISTING

BUILDING C

CLASSROOMS
A 4778

A 04-10

E;ISTING

BUILDING F

CLASSROOMS
A 4778

A 04-10

E;ISTING

BUILDING D

CLASSROOMS
A 4778
8 A 04-10

E;ISTING

BUILDING E

CLASSROOMS
A 4778

A 04-10

E;ISTING
RELO 23
A 384
E;ISTING
RELO 24
A 384
E;ISTING
RELO 2
A 143
E;ISTING
RELO 2
A 747

E;ISITNG
RELO 27
A 747

E;ISTING
RELO 28
A 747

E;ISTING
RELO 33
A 100213
E;ISTING
RELO 30
A 100213
E;ISTING TOILET BUILDING L
A 04-10

¹
¹
¹
¹
¹
¹
;
;
;
;
;
;
;
;
;
;
;
;
;
; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ;
;
; ; ;
;;;;
;;;;;;;

E
FH
FH
FH

BUILDING G

CLASSROOMS

BUILDING H

CLASSROOMS

BUILDING J

CLASSROOMS
LUNCH

SHELTER

BUILDING K

KINDERGARTEN
FH
E;ISTING
CANOPY
A 04-10

E;ISTING
SHADE

SHELTER
A 101483
SP
FDC
;
;
;
;

NO PARKING
No Overlap
No Overlap
No Overlap
12"
36"
72"
66"60"
54"
48"

-10848-72
84
ASTMB07
ASTMB07
ASTMB
8 ASTMB
8ASTMB
8 4807284108

ZZUN3249
48"
63"
78"
ZZUN9390
LUNCH

SHELTER
;
;;
;;;;
KINDER
GARDEN
SANDBO;
TWO 8
;
20 CONE;

STORAGE
BO;ES
; ; ;
;;;;;;;
;;;
; ; ; ; ; ;
;
ASTM

ASTM TOT
ASTM

ASTM TOT
ASTM
It / 274mm
ASTM It / 1830mm
ASTM
It / 274mm
ASTM It / 1830mm
ASTM

ASTM TOT

ASTM TOT
ASTM
ASTM It / 1830mm
ASTM
It / 274mm

STATIONTRANSFER

STATIONTRANSFER
72"
60"
36"
1 A124
1 A123
18 A811
20 A811
Plot Date: 4/2
/2020 11:43:38 PM Last Save B\: Mharris Login: Joshua Harris G:?ProMects?School Districts?Carlsbad USD?CBU-Hope ES - Modernization?CBU-Hope ES MOD Drawings?Architectural?CBU-HESM-A111.dwg Architect / Engineer Stamp
Date:

Scale:

Drawn B\:

ChecNed B\:
10/23/201

As Shown
JT
MR
Rev
10/23/201

DSA SUBMITTAL
DateIssue Hope Elementar\ School
3010 TamaracN Avenue
Carlsbad, CaliIornia
2010
Architect
FPL Associates
L.A. Design Associates, Inc.

Grossman and Speer, Associates, Inc.

MDC Consulting Engineers
BMA Mechanical PCE
APPL No. A 04-118734
Sheet Title
Sheet Number
Disclaimer:

SHOWN AND DESCRIBED HEREIN INCLUDING ALL TECHNICAL DRAWINGS

ARE PROPRIETARY AND CANNOT BE COPIED, DUPLICATED OR
COMMERCIALLY EXPLOITED, IN WHOLE OR IN PART. THE DRAWINGS AND

SPECIFICATIONS SHALL NOT BE USED BY THE OWNER ON OTHER

PROJECTS, FOR ADDITIONS TO THIS PROJECT, OR FOR COMPLETION OF THIS PROJECT BY OTHERS. THE OWNER AGREES TO HOLD HARMLESS,

INDEMNIFY AND DEFEND THE ARCHITECT AGAINST ALL DAMAGES, CLAIMS

AND LOSSES, INCLUDING DEFENSE COSTS, ARISING OUT OF ANY REUSE

OF PLANS AND SPECIFICATIONS WITHOUT THE WRITTEN AUTHORIZATION OF THE ARCHITECT OF RECORD.

Consultants
DSA Stamp
04/10/2020 PRE-BID
0/01/2020 DSA BACK CHECK
Overall Site Plan
A111
LEGEND

DESCRIPTION SYMBOL

NEW CONSTRUCTION
E;ISTING CONSTRUCTION
Architect / Engineer Stamp
1OVERALL SITE PLAN
SCALE: 1"=30'-0"

TAMARACK AVENUE

WILSHIRE
AVENUE

EXISTING

BUILDING A
A# 47789
A# 04-109996

EXISTING

BUILDING B

KINDERGARTEN
A# 47789
A# 04-109996

EXISTING

BUILDING C

CLASSROOMS
A# 47789
A# 04-109996

EXISTING

BUILDING F

CLASSROOMS
A# 47789
A# 04-109996

EXISTING

BUILDING D

CLASSROOMS
A# 477898
A# 04-109996

EXISTING

BUILDING E

CLASSROOMS
A# 47789
A# 04-109996

EXISTING
RELO 23
A# 53864

EXISTING
RELO 24
A# 53864

EXISTING
RELO 25
A# 61436

EXISTING
RELO 26
A# 67479

EXISITNG
RELO 27
A# 67479

EXISTING
RELO 28
A# 67479

EXISTING
RELO 33
A# 100213

EXISTING
RELO 30
A# 100213

EXISTING TOILET BUILDING L
A# 04-109996
◊
◊
◊
◊
◊
◊
X
X
X
X
X
X
X
X
X
X
X
X
X

X X X X X X X X X X X X X X X X X X X
X
X X X
XXXX

XXXXXXX
(E)FH
FH
FH

BUILDING G

CLASSROOMS

BUILDING H

CLASSROOMS

BUILDING J

CLASSROOMS
LUNCH

SHELTER

BUILDING K

KINDERGARTEN
FH

EXISTING
CANOPY
A# 04-109996

EXISTING
SHADE

SHELTER
A# 101483
SP
FDC
X
X
X
X

NO PARKING
LUNCH

SHELTER
X
XX
XXXX
KINDER
GARDEN

SANDBOX
TWO 8' X
20' CONEX

STORAGE
BOXES
X X X

XXXXXXX
XXX

X X X X X X
X
ASTM

ASTM TOT
ASTM

ASTM TOT
ASTM 9ft / 2745mm
ASTM 6ft / 1830mm
ASTM 9ft / 2745mm
ASTM 6ft / 1830mm
ASTM

ASTM TOT

ASTM TOT
ASTM
ASTM 6ft / 1830mm
ASTM 9ft / 2745mm

STATIONTRANSFER

STATIONTRANSFER
72"60"
36"
1 A124
1 A123
18 A811
20 A811
Plot Date: 6/9/2020 5:16:05 PM Last Save By: jharris Login: John Thomas G:\Projects\School Districts\Carlsbad USD\CBU-Hope ES - Modernization\CBU-Hope ES MOD Drawings\Architectural\CBU-HESM-A111.dwg Architect / Engineer Stamp
Date:

Scale:

Drawn By:

Checked By:
10/23/2019
As Shown
JT
MR
Rev
10/23/2019 DSA SUBMITTAL
DateIssue Hope Elementary School
3010 Tamarack Avenue
Carlsbad, California 92010
Architect
FPL Associates
L.A. Design Associates, Inc.

Grossman and Speer, Associates, Inc.

MDC Consulting Engineers
BMA Mechanical +PCE
APPL No. A 04-118734
Sheet Title
Sheet Number
Disclaimer:

SHOWN AND DESCRIBED HEREIN INCLUDING ALL TECHNICAL DRAWINGS

ARE PROPRIETARY AND CANNOT BE COPIED, DUPLICATED OR
COMMERCIALLY EXPLOITED, IN WHOLE OR IN PART. THE DRAWINGS AND

SPECIFICATIONS SHALL NOT BE USED BY THE OWNER ON OTHER

PROJECTS, FOR ADDITIONS TO THIS PROJECT, OR FOR COMPLETION OF THIS PROJECT BY OTHERS. THE OWNER AGREES TO HOLD HARMLESS,

INDEMNIFY AND DEFEND THE ARCHITECT AGAINST ALL DAMAGES, CLAIMS

AND LOSSES, INCLUDING DEFENSE COSTS, ARISING OUT OF ANY REUSE

OF PLANS AND SPECIFICATIONS WITHOUT THE WRITTEN AUTHORIZATION OF THE ARCHITECT OF RECORD.

Consultants
DSA Stamp
04/10/2020 PRE-BID
05/01/2020 DSA BACK CHECK
Overall Site Plan
A111
LEGEND

DESCRIPTION SYMBOL

NEW CONSTRUCTION

EXISTING CONSTRUCTION
DSA

DEPARTMENT OF GENERAL SERVICES

DIVISION OF THE STATE ARCHITECT
DSA

DIVISION OF THE STATE ARCHITECT

IDENTIFICATION STAMP
DIV. OF THE STATE ARCHITECT
APP:

INC:

REVIEWED FOR
SS
FLS
ACS
DATE:
4 4
4 04-118734
06/10/2020
RFI RFI-198
60'
2'11"
66'7"
XXX X
ING
24 3864

EXISTING
RELO 25
A# 61436

EXISTING
RELO 26
A# 67479

EXISITNG
RELO 27
A# 67479

EXISTING
RELO 28
A# 67479

EXISTING
RELO 33
A# 100213

EXISTING
RELO 30
A# 100213
X
X
XX
X

X X X X X X

XXXXXXXX

XXXXXXXXXXXXXX
X
X

BUILDING G

CLASSROOMS

BUILDING H

CLASSROOMS

BUILDING J

CLASSROOMS
LUNCH

SHELTER
FH

EXISTING
SHADE

SHELTER
A# 101483
X
XXXX

XXXXXXX
1 ENLARGED SITE PLAN NEW CLASSROOM BUILDING
SCALE: 1/16"=1'-0"
1/16" = 1'-0"
071
071
071
051
071
071
071
071
071
071
068
051
065
066
069054
070
054
054
054054
061
052
061
062
062
062
062
063
064 064
063
064
064
064
064
064
064
072
072
072
072
072
072
059
073
17 A115
5 A115
059
073
073
100100100
100
100
055
56 055
2 SK-1
225.87 FS225.87 FS225.65 FS
225.55 FS225.87 FS
225.87 FS
225.95 FS
(225.45 FS)224.90 FS
224.05 TC
223.90 FS
(224.80 FS)
225.75 TC
225.75 FS
225.77 TG103
104

EXISTING

TRASH/UTILITY

ENCLOSURE
Plot Date: 6/15/2021 3:39:51 PM Last Save By: jthomas Login: John Thomas G:\Projects\School Districts\Carlsbad USD\CBU-Hope ES - Modernization\CBU-Hope ES MOD Change Orders, RFP's, RFI's, Addenda\CCD\CCD 26A Trash Enclosure\CBU-HESM-A124.dwg
Architect / Engineer Stamp
Date:

Scale:

Drawn By:

Checked By:
10/23/2019
As Shown
JT
MR
Rev
10/23/2019 DSA SUBMITTAL
Date Issue
Hope Elementary School
3010 Tamarack Avenue
Carlsbad, California 92010
New Classroom Buildings and Modernization
Architect
FPL Associates
L.A. Design Associates, Inc.

Grossman and Speer, Associates, Inc.

MDC Consulting Engineers
BMA Mechanical +PCE
APPL No. A 04-118734
Sheet Title
Sheet Number
Disclaimer:

SHOWN AND DESCRIBED HEREIN INCLUDING ALL TECHNICAL DRAWINGS

ARE PROPRIETARY AND CANNOT BE COPIED, DUPLICATED OR
COMMERCIALLY EXPLOITED, IN WHOLE OR IN PART. THE DRAWINGS AND

SPECIFICATIONS SHALL NOT BE USED BY THE OWNER ON OTHER

PROJECTS, FOR ADDITIONS TO THIS PROJECT, OR FOR COMPLETION OF THIS PROJECT BY OTHERS. THE OWNER AGREES TO HOLD HARMLESS,

INDEMNIFY AND DEFEND THE ARCHITECT AGAINST ALL DAMAGES, CLAIMS

AND LOSSES, INCLUDING DEFENSE COSTS, ARISING OUT OF ANY REUSE

OF PLANS AND SPECIFICATIONS WITHOUT THE WRITTEN AUTHORIZATION OF THE ARCHITECT OF RECORD.

Consultants
DSA Stamp
04/10/2020 PRE-BID
05/01/2020 DSA BACK CHECK
6/1/2021 CCD -2626 CCD-
KEYNOTES:

Enlarged Site Plan
New Classroom
Building
A124
051CONCRETE PAVING, DOWEL INTO EXISTING WHERE OCCURS, SEE CIVIL DRAWINGS 052AC PAVING, SEE CIVIL DRAWINGS.
054EXISTING FENCE AND GATE WHERE OCCURS.
055CHAIN LINK FENCE, SEE DETAIL 1/A812 .
056CHAIN LINK GATE, SEE DETAIL 2/A812 .
061EXISTING CONCRETE BLOCK BALL WALL TO REMAIN. PROTECT IN PLACE. RESTRIPE. 062EXISTING PLAY COURT TO REMAIN.
063BASKETBALL COURT SEE DETAIL 10/A812
064PLAY COURT STRIPING, SEE DETAIIL 10/A812.
06530' X 40' LUNCH SHELTER. SEE PC DRAWINGS A# 02-115731. 06620' X 42' LUNCH SHELTER. SEE PC DRAWINGS A# 02-115731. 059PLAY EQUIPMENT WITH POURED IN PLACE RESILIENT SURFACING SEE SHEET A125. 068FIRE HYDRANT, SEE CIVIL DRAWINGS.
069EXTEND CMU WALL, SEE DETAIL 10/A811.
070EXISTING CMU ENCLOSURE, PROTECT IN PLACE.
071PLANTER, SEE LANDSCAPE DRAWINGS.
072EXISTING TREE TO REMAIN, PROTECT IN PLACE.
073TURF AREA, SEE LANDSCAPE DRAWINGS.
10012" WIDE X 6" DEEP CONCRETE MOW STRIP AT SAWCUT EDGE OF (E) AC PAVING. WHERE MOW 103INSTALL 20' WIDE GATE RELOCATED FROM THIS SITE PER 1/A123. INSTALL NEW FENCING ON EACH SIDE OF GATE AS NEEDED . SEE DETAIL 15/ SK-1.
104AC PAVING PER TABLE 2 ON SHEET COO4.
26 CCD-
26 CCD-
DSA

DEPARTMENT OF GENERAL SERVICES

DIVISION OF THE STATE ARCHITECT
DSA

DIVISION OF THE STATE ARCHITECT
APP:

INC:

REVIEWED FOR
SS

APPROVED
DIV. OF THE STATE ARCHITECT
DATE:
04-118734
4 FLS
ACS
4 4
06/21/2021
RFI RFI-169
RFI RFI-11
RFI RFI-11
0/01/00 DSA BAC. C+EC.

DSA

DEPARTMENT OF GENERAL SERVICES

DIVISION OF THE STATE ARCHITECT
DSA

DIVISION OF THE STATE ARCHITECT

IDENTIFICATION STAMP
DIV. OF THE STATE ARCHITECT
APP:

INC:

REVIEWED FOR
SS
FLS
ACS
DATE:
4 4
4 04-118734
06/10/2020
1" CW TO BOTTLE
FILLER. SEE DETAIL
CCD 10 SK-1.

CONNECT TO
(E) 3" CW
CAP 2" CW IN
YARD BOX.
1" CW. CONNECT TO
(E) BACKFLOW DEVICE
2" CW
0
RFI RFI-94
RFI RFI-7
RFI RFI-6

FIRE LINE
RFI RFI-91
RFI RFI-69
RFI RFI-14
RFI RFI-39
RFI RFI-39
RFI RFI-168
RFI RFI-171
RFI RFI-174
RFI RFI-10
TOP 21.12
FS 26.40
Concrete in
this area
4" Sewer
Drain
6" Fire
Drinking Water Supply
E 3" Main 30" BFS
1" Stub 15" BSG
16'-3"
2" Water
Line
2" Water Supply
2" Electrical Conduit
2" Comm Conduit
2" FA Conduit
13'-6"
16'-0"
Valve
10'
134'10"
9'6"
3836.34ft²
468.18ft²
106.18ft²

16.45ft²

73.25ft²
427.94ft²
126.07ft²
100.65ft²

96.78ft²
305.08ft²
10/28/2020 CCD -088 CCD-
18 CCD-
18 CCD-
18 CCD-
DSA

DEPARTMENT OF GENERAL SERVICES

DIVISION OF THE STATE ARCHITECT
DSA

DIVISION OF THE STATE ARCHITECT
APP:

INC:

REVIEWED FOR
SS

APPROVED
DIV. OF THE STATE ARCHITECT
DATE:
04-118734
FLS
ACS
4 11/03/2020
2" Water
Line
RFI RFI-135
RFI RFI-86
RFI RFI-26
04-118734_CCD_008_A DSA Approved.pdf
RFI RFI-13
0/01/00 DSA BAC. C+EC.

DSA

DEPARTMENT OF GENERAL SERVICES

DIVISION OF THE STATE ARCHITECT
DSA

DIVISION OF THE STATE ARCHITECT

IDENTIFICATION STAMP
DIV. OF THE STATE ARCHITECT
APP:

INC:

REVIEWED FOR
SS
FLS
ACS
DATE:
4 4
4 04-118734
06/10/2020
45 45
90 to 45
RFI RFI-193
RFI RFI-192
6"
Fire

KBA
CFJ
DEGH
Plot Date: 4/7/2020 1:35:49 PM Last Save By: davidm Login: David Mena \\bmaserver01\Data\Drawings\19\19201.00_CUSD - Hope Elementary School\plumb\19201.00_P101_SITE.dwg Architect / Engineer Stamp
Date:

Scale:

Drawn By:

Checked By:
10/23/2019
As Shown
RevDate Issue
Hope Elementary School
3010 Tamarack Avenue
Carlsbad, California 92010
Architect
APPL No. A 04-11734
Sheet Title
Sheet Number
Disclaimer:

SHOWN AND DESCRIBED HEREIN INCLUDING ALL TECHNICAL DRAWINGS

ARE PROPRIETARY AND CANNOT BE COPIED, DUPLICATED OR
COMMERCIALLY EXPLOITED, IN WHOLE OR IN PART. THE DRAWINGS AND

SPECIFICATIONS SHALL NOT BE USED BY THE OWNER ON OTHER

PROJECTS, FOR ADDITIONS TO THIS PROJECT, OR FOR COMPLETION OF THIS PROJECT BY OTHERS. THE OWNER AGREES TO HOLD HARMLESS,

INDEMNIFY AND DEFEND THE ARCHITECT AGAINST ALL DAMAGES, CLAIMS

AND LOSSES, INCLUDING DEFENSE COSTS, ARISING OUT OF ANY REUSE

OF PLANS AND SPECIFICATIONS WITHOUT THE WRITTEN AUTHORIZATION OF THE ARCHITECT OF RECORD.

Consultants
DSA Stamp
10/23/2019 DSA SUBMITTAL
M 33,682

BRANDON RODGERS

MECHANICAL
EXP 6/30/21

REGISTERED PROFESSIONAL ENGINEER

STATE OF CALIFORNIA
04/10/2020 PRE-BID
FPL Associates
L.A. Design Associates, Inc.

Grossman and Speer, Associates, Inc.

MDC Consulting Engineers
BMA Mechanical +PCE
P101

PLUMBING

SITE PLAN

GENERAL NOTES

PLUMBING SITE PLAN
SCALE: 1/32 = 1'-0"
DM
RS
0/01/2020 DSA BACK CHECK
DSA

DEPARTMENT OF GENERAL SERVICES

DIVISION OF THE STATE ARCHITECT
DSA

DIVISION OF THE STATE ARCHITECT

IDENTIFICATION STAMP
DIV. OF THE STATE ARCHITECT
APP:

INC:

REVIEWED FOR
SS
FLS
ACS
DATE:
✔
✔
✔
04-118734
06/10/2020
Incident Report – Hope Elementary School, 3010 Tamarack Ave, Carlsbad, CA 92010 Mar. 15, 2022

ATTACHMENT E

Carlsbad Municipal Water District - A Subsidi ary District of the City of Carlsbad 5950 El Camino Real - Carlsbad CA 92008
Ph. (760) 438-2722 Email [email protected]
C IT Of

CARLSBAD
Account Number: 4611900 Date of Notice: February 24, 2022 -----------
Service Address: 3010 TAMARACK AV
Location: Hope Elem.-top slope front of sc

CARLSBAD UNIFIED SCHOOL
6225 EL CAMINO REAL
CARLSBAD CA 92009
Re: BACK TEST
Date Tested: 2.., 2 t/ -2,(JZ Z.

AWWAo~ rt.No.: s- zzz1
Firm Name: (JfJ of Uzi' /4)q/
Tester Name: DM ::foHl't/5oN
Telephone No.: 7(:Q - '-f3B .- 2 7 22-
Line Valve# 2 - Tight ~ Leaked ( ) Replaced ( )
Reduced Pressure Princi ple Assembly
Double Chec k Valve Assembly
Check #1
Tight (W
Test Before
Repa irs Leaked ( )
New Mater ials
and Repairs
Made
Test After Tight ( )
Repairs
Teste,s s;gaatucec ~
Check 112
Tight ~
Leal<ed (
Tight ( )
Interval: 3
Make/Model: Wilkins 975XL2
Size: 2
Serial No.: ACB4424
Type: RP
Mtr. Size/Num.: 2 0044747269
User Code: IN
Gauge Serial No. / / / JS(;'83 /Of
PSI:

Apparent t,,, 0
Opened At "2..t', ~
) Actua l h , 0
Pass M Fail ( )
'
App arent
Opened At
Actual
Pass ( )

Incident Report – Hope Elementary School, 3010 Tamarack Ave, Carlsbad, CA 92010 Mar. 15, 2022

ATTACHMENT F

County Of San Diego
Department of Environmental Health
Land and Water Quality Division

RECYCLED WATER SHUTDOWN TEST/COVERAGE TEST

Date
02/24/2022
ACCELA Permit No.

DEH2015-LRWS-000359
Water District
Carlsbad Municipal Water District
Start
4:10 pm
End
8:10 pm
VX Code

Project Name and Address

HOPE ELEMENTARY SCHOOL
3010 TAMARAK AVENUE
CARLSBAD, CA 92010
Recycled water use
Irrigation
Staff Present
J. McCullough & Mike Espudo
Billing party if different than water district
Same
Threshold valves used?

1. No

Test gauge locations

1. #4 test cock of RP @ water meter (4:10 pm, 22 psi)

Shutdown test description:

This cross connection inspection was required following the discovery of a cross connection at Hope Elementary School. School personnel notified the Carlsbad Municipal Water District of concerns regarding the color and odor of the water. The water district and school construction team identified a single point where the recycled water system was directly connected to the potable system. The connection was separated and this cross connection inspection was conducted to determine if that point was the only cross connection between the two systems.

The last cross connection inspection was conducted on April 5, 2017 and was witnessed by DEHQ staff. During the April 2017 inspection, no cross connections were observed or detected.

Two clocks control the irrigation system. Clock A was equipped to operate 16 stations and clock B had 11 stations. In addition, 2 valve boxes were identified on the southwest side of the property that controlled irrigation on the exterior of the school fencing (southwest portion of property). Each valve was operated for 2 minutes.

At the end of the 4 hour test the following was observed:
• Gauge pressure dropped gradually decreased from 22 psi to 10 psi. • No pressure spikes observed during the test.
• The system re-pressurized to approximately 92 psi once water was restored.

The reverse pressure differential test was conducted, taking place from February 25, 2022 – Feb 26, 2022. Pressure gauges were connected to five test points on the recycled water system, and pressure was dropped to approximately 20 psi. The potable system was in operation during this time at full pressure. The gauges were left to track for approximately 22 hours which is standard with reverse testing. No spikes in pressure were observed on the test charts submitted to DEHQ.

Unpermitted modifications to the recycled and potable system have been made to this site. Hope Elementary School shall submit as built plans of the site for review and approval by DEHQ. The Carlsbad Municipal Water District has pulled the recycled water meter for DEH2015-LRWS-000359. The recycled water meter shall not be approved for connection until all plans are approved by DEHQ, site visits are performed and a final cross connection inspection occurs where DEHQ is present.

DEH Test Recommendation/Guidance
Test pass:

Accela

Link
I I
I
I
D
D
Incident Report – Hope Elementary School, 3010 Tamarack Ave, Carlsbad, CA 92010 Mar. 15, 2022

ATTACHMENT G

Date: February 24, 2022 at 6:10:41 PM PST
To: Eric Sanders <[email protected]>
Subject: Updated Message to Parents
For Hope families
Dear Hope Families,
This is a follow up to my earlier message regarding the school closure today. Hope will remain closed tomorrow, Friday, 2/25/22. We will not shift to online learning for this day.

Today, the City of Carlsbad was notified following a suspicion that the domestic water lines were crossed with reclaimed water irrigation lines on campus. Due to this suspicion, all water was immediately shut off on campus, and students were sent home.

The District had been working with its contractors to investigate reported concerns with intermittent discoloration of the water at Hope Elementary. In an abundance of caution, we made bottled water available to students and staff while we looked further into the problem.

Additional testing conducted by the City confirmed the suspicion. The City of Carlsbad is working closely with the district. We have located the problem and are repairing it immediately. Following the repair, all water lines on campus will be flushed with a high dosage of chlorinated water before restoring normal water services. The City of Carlsbad will conduct water samples and submit them to a laboratory to ensure that the water meets safe drinking standards. Multiple tests will be conducted over the weekend. We appreciate the City’s support as we work together to reopen the campus safely.

We are hopeful we will be able to resume school on Monday, 2/28/22, but need to wait until we have clearance from the City based on the laboratory tests over the weekend. I will send an additional communication no later than 7pm Sunday about the status of school on Monday.

We apologize for any inconvenience this school closure causes, however student and staff safety is always the top priority of school and district staff.

If your student experiences any stomach or intestinal illness, please consult with your physician. --
Regards,
Eric R. Dill
Assistant Superintendent, Business Services
Carlsbad Unified School District
Sent from my iPhone
Incident Report – Hope Elementary School, 3010 Tamarack Ave, Carlsbad, CA 92010 Mar. 15, 2022

ATTACHMENT H

Hope Elementa ry Sclhooi
Carlsbad Unified School District
301 O Tamarack Ave, Carlsbad, CA 9201 o
Driveway E)(it
ight turn only during arrival and dismissal TamaracUt Ave. 32 Whan
33 Driveway Entrance
One way
ATTACHMENT G .

Field
Incident Report – Hope Elementary School, 3010 Tamarack Ave, Carlsbad, CA 92010 Mar. 15, 2022

ATTACHMENT I

ENCi NA WASTEWATER AUTHORITY
A Public Agency 6200 Avenida Encinas
Carlsbad, CA 9201 1-1095
Telephone (760) 438-394 1
FAX (760) 438-386 -1 (Plant)
(760) 431-7493 (Ad min)
SAMPLE RESULTS REPORT R evor t D t 2/27/2022 a e:

REPORT TO ELAP Certification No. 1441 220226001
CMWD Ref. No. EC: 2022
5950 El Camino Real
Carlsbad, CA 92008
Attent ion: Eric Sanders
Sample ID I Sample Point I Analyte Name I Result I Units I Method
Reference
AB37849 MULTIPURPOSE KITCHEN Collected : 02/26/2022 Time: 10:10 Total Residua l Chlorine 2.9 mg/L SM4500 CLO
Total Coliform Absent Prese nt/ Absent SM9223
Temperature 17 C SM2550B
E.co li Absent Present/Absent SM9223
AB37850 CLASSROOM 27 Collected: 02/26/2022 Time : 10:21 Total Residual Chlorin e 2.8 mg/L SM4500 CLO
Total Coliform Absent Present/Absent SM9223
Temperature 17 C SM2550B
E.co li Absent Present/ Absent SM9223
AB37851 CLASSROOM 26 Collected: 02/26/2022 Time: 10:26
Total Residual Chlorine 2.8 mg/L SM4500 CLO
Total Coliform Absent Present/Absent SM9223
Temperature 17 C SM2550B
E.coli Absent Present/Absent SM9223
AB37852 CLASSROOM 36 Collected: 02/26/2022 Time: 10:32
Total Residual Chlorin e 2.8 mg/L SM4500 CLO
Total Coliform Absent Present/Absent SM9223
Temperature 17 C SM2550B
E.coli Absent Present/ Absent SM9223
AB37853 CLASSROOM 21 Collected: 02/26/2022 Time: 10:36
Total Resid ual Chlorine 2.9 mg/L SM4500 CLO
Total Coliform Absent Present/ Absent SM9223
Temperature 17 C SM2550B
E.coli Absent Present/ Absent SM9223
AB37854 CLASSROOM 34 Collected: 02/26/2022 Time: 10:41
Total Residual Chlorin e 2.8 mg/L SM4500 CLO
Total Coliform Absent Present/Absent SM9223
Temperature 17 C SM2550B
E.co li Absent Present/Abs ent SM9223
AB37855 CLASSROOM 29 Collected: 02/26/2022 Time: 10:45
Total Residual Chlorin e 2.9 mg/L SM4500 CLO
Total Coliform Absent Present/ Absent SM9223
Temperature 17 C SM2550B
~ el of2
SERVING THE CITY OF VISTA, CITY OF CARLSBAD, BUENA SANITATION DISTRICT, VALLECITOS WATER DISTR ICT, Printed on LEUCADIA WASTEWATER DISTRICT AND CITY OF ENCINITAS R ( ycl d l'3per ENCi NA WASTEWATER AUTHORITY
A Public Agency 6200 Avenid a Encinas
Carl sbad, CA 920 11-1095
Telephone (760) 438-394 1
FAX (760) 438 -386 1 (Pl ant)
(760) 431-7493 (Admi n)
SAMPLE RESULTS REPORT R epor t D t 2/27/2022 a e:

Jeff Parks, Laboratory Manager

SERVING TH E CITY OF VISTA, CITY OF CARLSBAD, BUENA SANITATION DISTRICT, VALLECITOS WATER DISTRICT,

LEUCADIA WASTEWATER DISTRICT AND CITY OF ENCINITAS
@ ge2 of2
Prin1ed on
Recycled Pa1Jer
lEYP· ~-1 q V
TKERr,1 Sitt
CHA.liN-OJF-CU§TODY
2 0 0 3 6 8 9 5 4 1Eb'udi1o1 Was·~ewc:r~err A11.qtl1oiroiiv ll.allJora11olflf 6'2001 Aveo11io1@ IE111dmlls, lCair!slbato'I, «:A 9W:il.'.il.

IEWA UMS 11.ogin Numlber: ·;:1ri0 ~)d hDu J Rev 4/2/19JP Phone (760)438 -3941
IEILAP Certificate N1J1mber 1441
Ciie01\l:: Carlsbad M11..miqllai Water ll)os\':rric\l: - IDoru{es\':k Waiter Quam:y IRel!Jlor~ Address: 5950 !El Camino !Real
Carlsbao1, CA 92008
System Nn.omlberr: 3710l0l5°1Jl[l):Il.
§21m!PJlerM: IYL t::.~ t) ;,Ji,u , · Pe+er ?c ..,,.,,,,,An S@m[i]ie Dc1\te: 7..(7..t... /zi..

Conta iner(s) ~empe rature ''Cl, Residual
'''Lal-I EWA DC mg/i Sample
§am;oie if»t(J)Dlnrlt IDlt Sample Time Metrbc it Type
1 Y\ll(A L-rl ~Ult~~ 1L,,c+/pJ 1010 /7 D Z .Gl - DW I ? 2 t l .~SS t2. ouvV\ J-7 /0 i, 170 z.. s - DW I f
f-L¥1-&SE,cDIU'l 17 ° 2,8
. -
3 2k> !b l.lo - IDW I r
4 (' Ll'1-"'i.$R.onvV\ 36 l0~2 17 ~ z..s - row l F>
5 ClJ4:c=:;_~ ~DV\I\ '2.. I /0'!,(p 11 ° 2,,GJ - DW I p 6 e,1.-Ass12. ooW\ ~c./- Io'-\-\ l 1 • z. P. - DW
' r
7 Cl~<:..Oonlll/\ ~1 \D'-\S"' I 7b 1..9 - DW I p
8 Cl-t!'.!SW.cow\ ID \051 ~ l ' l,4 - ow l p
9 CLjlj \'(O nrwl/'\ h /{) 5 ~ I 5 • 1-4'-I - DW I p
10 CL ~-SS'R.l')ov\/1 I /103 Jq 0 2.q - DW l p
11 ,..,./L.14~SQ.\::>Ow1 \L~ l \ D'\ n · 2 ,q - DW I p - 12 DW
13 DW
14 DW
15 ow
RELINQUISHED BY: RECEIVED BY:

Print Name: Signature:

Signature: Print Name:

Date & Time Date & Time
Company: Company:

RELINQUISHED BY: RECEIVED BY:

Print Name: Signature:

Signature: Print Name:

Date & Time Date 8, Time
Company: Company:
"' Analys is performed by snmpling personnel.
-"-9 Standa rd Methods fo r the Examination of Wate r and Wastewa ter, 22nd ed ition.

REQUESTED ANALYSIS
..,
i:: :::;
0 0
u u
LY
QJ ,~ ro ..... rn
E 0:: u
u .(fl
6 > 0 :E J: ~ el. Cl.
<5 0 '- ro u ,:,.J
0 ,._
iii ,._ (!)
QJ I::: ...., .:-,
0 Q) (ll
. IF- :r; ~
';(-
~t
~~
~t' i!-
,c - -
j( - -
}( - -
}(
- -
)( _,.
-
}( - -
)( - -
}( - -
}( - -
)( - -
j( - -
}(
){
)(
J(
ENCi NA WASTEWATER AUTHORITY
A Publi c Agency 6200 Avenid a Enc inas
Ca rl sbad , CA 920 11-10 95
Te leph o ne (760) 438-394 1
FAX (76 0) 438-386 1 (Pla nt)
(760) 43 1-7493 (Adrn in)
SAMPLE RESULTS REPORT R epor tD t a e: 2/26/2022
REPORT TO ELAP Certification No. 1441 220225004
CMWD Ref. No. EC: 2022
5950 El Camino Real
Carlsbad, CA 92008
Attention: Eric Sanders
Sample ID I Sample Point I Analyte Name I Result I Units I Method
Reference
AB37825 Multipurpose Kitchen Collected: 02/25/2022 Time: 09:18 Total Residual Ch lorine 2.5 mg/L SM4500 CLD
Total Co liform Absent Present/ Absent SM9223
Temperature 16 C SM2550B
E.col i Absent Present/ Absent SM9223
AB37826 Classroom 27 Collected: 02/25/2022 Time: 09:23
Total Residual Chlorine 2.4 mg/L SM4500 CLD
Tota l Co liform Absent Present/ Absent SM9223
Temperature 16 C SM2550B
E.coli Absent Presen t/ Absent SM9223
AB37827 Classroom 26 Collected: 02/25/2022 Time: 09:30
Tota l Residual Chlorine 2.7 mg/L SM4500 CLD
Total Co liform Absent Present/ Abse nt SM9223
Temperat ure 15 C SM2550B
E.coli Absent Present/ Absent SM9223
AB37828 Classroom 36 Collected: 02/25/2022 Time: 09:49
Total Residual Chlorine 2.8 mg/L SM4500 CLD
Tota l Co liform Absent Pre sent/Ab sent SM9223
Temperature 15 C SM2550B
E.coli Absent Present/ Absent SM9223
AB37829 Classroom 21 Collected: 02/25/2022 Time: 09:43
Tota l Residual Chlor ine 2.3 mg/L SM4500 CLD
Tota l Co liform Absent Pre sent/Absent SM9223
Temperature 16 C SM2550B
E.co li Absent Pre sent/ Absent SM9223
AB37830 Classroom 34 Collected: 02/25/2022 Time: 09:58
Total Residual Ch lorine 2.8 mg/L SM4500 CLD
Total Co liform A bsent Present/ Absent SM9223
Temperatu re 15 C SM2550B
E.coli A bsent Present/ Absent SM9223
AB37831 Classroom 29 Collected: 02/25/2022 Time: 10:04
Total Residual Ch lorine 2.7 mg/L SM4500 CLD
Tota l Co liform Absent Present/ Absent SM9223
Tempera ture 15 C SM2550B
@ ge 1 of2

SERVING THE CITY OF VISTA, CITY OF CARLSBAD, BUENA SANITATION DISTRICT, VALLECITOS WATER DISTRICT, LEUCADIA WASTEWATER DISTRICT AND CITY OF ENCINITAS Prin1Pd on Relycled P.i per

ENCINA WASTEWATER AUTHORITY
A Public Agency 6200 Ave nicla Encin as
Carl sbad, CA 92 011 -1095
Telephone (760) 43 8-394 1
FAX (760) 438-386 1 (Plant)
(760) 43 1-74Y3 (Aclrnin )
SAMPLE RESULTS REPORT R epor t D t 2/26/2022 a e:

REPORT TO ELAP Certification No. 1441 220225004
CMWD Ref. No. EC: 2022
5950 El Camino Real
Carlsbad, CA 92008
Attention: Eric Sanders
Sample ID I Sample Point I Analyte Name I Result I Units I Method
Reference
E.coli Absent Present/ Absent SM9223
AB37832 Classroom 10 Collected: 02/25/2022 Time: 10:08
Total Residual Chlorine 2.9 m g/L SM4500 CLO
Total Coliform Absent Present/ Absent SM9223
Temperature 15 C SM2550B
E.coli Absent Present/Absent SM9223
AB37833 Classroom 6 Collected: 02/25/2022 Time: 10:13
Total Residual Chlorine 2.9 mg/L SM4500 CLO
Total Coliform Absent Present/Absent SM9223
Temperature 16 C SM2550B
E.coli Absent Present/ Absent SM9223
AB37834 Classroom 1 Collected: 02/25/2022 Time: 10:18
Total Residual Chlorine 2.8 mg/L SM4500 CLO
Total Coliform Absent Present/Ab sent SM9223
Temperature 15 C SM2550B
E.coli Absent Present/Absent SM9223
AB37835 Classroom K3 Collected: 02/25/2022 Time: 10:25
Total Residual Chlorine 2.5 mg/L SM4500 CLO
Total Coliform Absent Present/Absent SM9223
Temperature 16 C SM2550B
E.coli Absent Present/ Absent SM9223
, /),JI/,, ,.J,, tor
Certified By:)>g/4;~ "'.!eff P,v~5 Date:

Jeff Parks, Laboratory Manager

SERVING THE CITY OF VISTA, CITY OF CARLSBAD, BUENA SANITATION DISTRICT, VALLECITOS WATER DISTRICT,

LEUCADIA WASTEWATER DISTRICT AND CITY OF ENCINITAS
(!) ge2of2
Pnn1ed o n
l<ccyc led Paper
CHA] N-OJF'-CU§TODY
IEWA UMS logi n N1.1~lber:. d~ 0 d ;)')"O O q Rev 4/2/19 JP TEMP=7. 3d~
·r HEU,t S/ N
fa1ci 11o1 Wastewater AMtho1ro1tv ll.altlf ii Mm 8 9 5 4 620()) Avenio1a IEndnais, ( o1risibla1D1, CA 9W 11
Phone P'60) 438-394:ll. ..,
IELAP Certific ate Numb er 144:ll.

Cliel'lt: Carrisbacl Mll.lll'ilDqllal Water Dostrrict - IDomes'i:iic Wai'terr Quality !Re~or\:: REQUESTED ANALYSIS Addr ess: 5950 IEI Camino Real
~
C:
::I
IC@rr!slbaci, ICA 92008 0 0
U u
(!)
uJ OJ
m Syste m Nlim lberr: 3110COS~oim ....... ro
l:: C: u
Siai mtoJler(s): 'J:?J4✓ ()11},{T{V~
u ·;;;
'= > 0 :.2 .s:: ~ !:;!.
~1~1~~
(5 0 Q.

S@ml(Oie Da'i:e: '- ro u .;-,
0 ,.,
Container(s) rn :.. (!J
~emperature (!) ;::: ';Ci2 Resicluai .,_, ,:..,1
;''6lf-l 0 (!) (!J
EWA mg/ I Sample E= ::i:: ~
!Saml}»ie l}'»(O)uO'll\t
o C -?t'
t
;~
IDit Sample Time Mat rilt ii Type ";~ ,;
1 M1A1.-r1 Pllti P~ iL./-r?J.k=-tJ 01/f It>. 2-.s DW )( 2 C l-;l-.~ l:1..1') C Vl/1 -Z7 Oft.1 I bu 2.'1 DW }(
3 r A--14?.~ \er,, ., w1 1... G 0?30 15° 2,1
. -
DW }{
4 1( -:.(...~ 'SiiZ.I\Oi1'7 -;s l-'J 01~1 i~ :i,& liJW
"
5 Clv:t-s~i2..oc,M :2-1 0443 1 t/ Z.3 DW )(
6 CL'4--SC, Yl r ,n IIV1 ?ii./ O~b~ 15~ 2 . tJ DW }(
7 t'' I " -""-SI ? - ._, .,,,., 2-1 100'{ /5"' 1. ·-, DW ){ 8 Cl-'4ss 1,1 ,..,o,-i-, I D /00& ISi> 1..i DW ){
9 Cl/45.s ~(;:, wi b, (0/~ I'=>" :l. t DW )(
10 a~s_cz.1:-..0 vl/1 I ( 0 I Y- - " J.5 / ':J DW )(
11 Ir L.o..s:-1o...r,,D,'V\ I<::~ ID 'Z-~ IL
0 z. s- DW ){
12 DW )(
13 DW ){
14 DW )(
15 DW J{
RELINQUISHED BY: RECEIVED BY:

Signature:

Print Name:

Date & Time
Company : Company:

RELINQUISHED BY: RECEIVED BY:

Print Name: Signature:

Signatur e: Print Name:

Date & Time Date & Time
Company: Company:
* Analysis performed by samplin g personn el.
~* Standard Methods fo r the Eirnmination of Wat er and Wastewater, 22nd ed ition.

Incident Report – Hope Elementary School, 3010 Tamarack Ave, Carlsbad, CA 92010 Mar. 15, 2022

ATTACHMENT J

1 Jeanette Brown
Subject: FW: Hope School
Attachments: Special 2-26-2022.pdf; Hope Elementary Potable.pdf; Hope School Recycled charts.pdf; Scan_.pdf; 3010 Tamarack Av - ACB4424 - 2-24-2022.pdf; DEH2015-LRWS-000359 02.24.22.pdf; SPECIAL 2-25-2022.pdf
From: Sterchi, Sean@Waterboards <Sean.Ster
[email protected]>
Sent: Sunday, February 27, 2022 1:26 PM
To: Eric Sanders <[email protected]>
Cc: McCarthy, Sean@Waterboards <[email protected]>; Souza, Kurt@Waterboards <[email protected]>; Polhemus, Darrin@Waterboards <[email protected]>; Robertson, Blair@Waterboards <[email protected]>; Ertas, Tuba@Waterboards <[email protected]>; McCullough, Jamelle <[email protected]>; Buonomo, Heather <[email protected]>; Kameisha Nichols ([email protected]) <[email protected]>; Ryan Johnson, DEH Food & Housing Division <[email protected]>; [email protected]; Mello, Vanessa <[email protected]>; Vicki Quiram <[email protected]> Subject: RE: 2‐26‐2022 Report CMWD
Eric,
I understand the following:

1. Carlsbad MWD and Hope Elementary have disconnected the cross connection that was discovered last week.

2. The use site’s PW meter is protected by an RP device, which was retested by the day of the cross connection discovery. Test cert is attached. The site is served by only 1 RW mete r and only 1 PW meter.

3. A 2‐way shutdown test has been performed with DEHQ oversight (reports and DEHQ test report attached).

4. The RW meter has been removed and the irrigation system served by RW is currently dry. CMWD will require Hope Elementary to submit RW use site plans and re ceive CMWD, DEHQ and DDW approval
prior to restoring RW service to the use site. In addition, if the existing RW system is to be highlined in the interim, CMWD will require the highline to be protected by an RP device and that device will be tested after installation and must receive a passing test.

5. The onsite potable water plumbing has been disinfected, flushed and tested per AWWA C651‐14.

Two sets of bacti’s were collected 2/25 and 2/26 from 11 sites, covering the majority of all buildings on the campus. Both reports and the sample siting plan are attached. The results are accepta ble.

Based on the actions taken by CMWD and acceptable bacti results, CMWD may lift the water quality advisory. Great job to you and the CMWD staff for the swift and effective response. As previously discussed, please submit
the incident report no later than 3/4/2022.

Thanks
Sean
Incident Report – Hope Elementary School, 3010 Tamarack Ave, Carlsbad, CA 92010 Mar. 15, 2022

ATTACHMENT K

From: Eric Dill <[email protected]>
Date: February 27, 2022 at 4:03:13 PM PST
To: Eric Sanders; Vicki Quiram
< Subject: Message for Hope Elementary Parents
Dear Vicky and Eric--
The message below was just sent to Hope families. I really appreciate all your help these last few days. Thank you very much. Please let me know if you need anything else.

Dear Hope Elementary Families,

District staff shared the following message with me a few minutes ago:

Hope Elementary School is cleared to reopen tomorrow, Monday morning, at its usual start time.

The City of Carlsbad has given the clearance to reopen, after treating the school’s plumbing and conducting water quality tests on Friday and Saturday which were analyzed by a third-party laboratory.

After the cross-connection was removed, the City purged the plumbing system throughout the school with highly chlorinated water, and then allowed the chlorinated water to sit overnight. On Friday, City crews then flushed out the chlorinated water with potable water. The water tests were conducted after this process was completed. We are grateful for the City’s assistance in helping us resolve this problem.

Additionally, we replaced all of the drinking water dispenser filters on campus.

While we are still investigating how this happened, it appears to us that the water lines were crossed during construction before the campus reopened in August. The water had been tested by the contractor using a standard test for safety to check for e. Coli and other bacterias before the school reopened, with negative results; but the tests did not detect the cross- connection. Subsequent tests by our contractors used the same method, with the same results.

As mentioned last week, the state water authorities recommend that if your child has any symptoms of stomach or intestinal illness, please consult with your physician.

We’re sorry that this situation occurred, and regret the concern, inconvenience, and frustration for our students, families, teachers and staff.

I look forward to welcoming our Hawks back to campus tomorrow, Monday, 2/28/22.

Sincerely,
Ashley Rossiter, Principal
--
Regards,

Eric R. Dill
Assistant Superintendent, Business Services
Carlsbad Unified School District
Incident Report – Hope Elementary School, 3010 Tamarack Ave, Carlsbad, CA 92010 Mar. 15, 2022

ATTACHMENT L

Hope Elementary School Water Issue
Frequently Asked Questions
2/28/2022
On Thursday, February 24, the City of Carlsbad was notified following a suspicion that the domestic water lines at Hope Elementary were crossed with reclaimed water irrigation lines on campus. Due to this suspicion, all water was immediately shut off on campus, and students were sent home.

Additional testing conducted by the City confirmed the suspicion. The City of Carlsbad worked closely with the district to locate the problem and repair it immediately.

The City of Carlsbad gave the clearance to reopen on Monday, February 28, after treating the school’s plumbing and conducting water quality tests, which were analyzed by a third-party laboratory for safety.

Additionally, we replaced all of the drinking water dispenser filters on campus.

Following additional complaints after winter break, more tests were performed and the District hired an independent consultant to look deeper into the cause of the recurring problem.

The testing information we received concerning the safety of the water was shared with the principal, and she was relying on the same information provided to the District.

As complaints persisted, the contractors were brought out again and eventually the District hired an independent consultant to conduct additional testing to determine the problem.

Was the water tested?
Yes. Testing was performed by the plumbing contractor. The water was tested twice before the school reopened–once before opening the new kindergarten classroom that was being temporarily used as an administration office, and once before the entire school was reopened.

The water was tested for e.coli and other coliforms which would indicate harmful bacteria in the water.

Reclaimed water is disinfected, which is why the tests did not detect those substances.

Following school opening, tests were again conducted by the contractor while the problem was being investigated. Again, no e.coli or other coliforms were detected.

Test results:

April 2,2021
August 13, 2021
November 10, 2021
January 11, 2022
February 24, 2022
Was the problem school wide or confined to specific locations? The plumbing system on the campus was being served by both potable water and water from the cross connection. The contaminated water mixed with the potable within the plumbing lines.

Do students need to be tested by their doctor?
The State Water Resources Control Board advises parents to seek medical attention if your child exhibits symptoms of stomach or intestinal illness.

City of Carlsbad crews then purged the plumbing system with heavily chlorinated water on Thursday night.

Why didn’t the District notify parents of the complaints? We are sincerely sorry that this was not reported earlier. We relied on the reports and information from our contractors, construction and bond program managers that the water had been tested for safety, that the issue was aesthetic, and would resolve. We did not anticipate the cause of the problem, and we regret that we did not discover the cause sooner. Once we were alerted to the cause, we took all the steps necessary to prevent further exposure; to inform our community; and to resolve the problem.

Carlsbad Unified School District, 2/28/2022 Page 3 of 3 Incident Report – Hope Elementary School, 3010 Tamarack Ave, Carlsbad, CA 92010 Mar. 15, 2022

ATTACHMENT M

From: Michael Espudo
To: Andrew Wilson
Subject: FW: Hope ES Drinking Fountain Water Supply
Date: Monday, February 28, 2022 1:29:22 PM
Attachments: Drinking Fontain Supply 01.jpeg
Drinking Fontain Supply 02.jpeg
C005-SITE-UTILITIES-PLAN-Rev.0 Redline.pdf
Demoed Restroom Water Supply.jpeg
From: Andy Teclaw <[email protected]>
Sent: Monday, August 17, 2020 12:17 PM
To: Michael Espudo <[email protected]>
Cc: Tyler Ennis <[email protected]>; Adam Weisberg <[email protected]> Subject: Hope ES Drinking Fountain Water Supply
Mike,
Attached are photos & plans showing work @ drinking fountain @ playground and Demoed Restroom Water Supply. This is the water supplies that have been disconnected at this time. If you review the attached plans, the domestic water lines that are to be tied into are well away from the reclaimed water supply lines.

CAUTION: Do not open attachments or click on links unless you recognize the sender and know the content is safe.

0/01/00 DSA BAC. C+EC.

DSA

DEPARTMENT OF GENERAL SERVICES

DIVISION OF THE STATE ARCHITECT
DSA

DIVISION OF THE STATE ARCHITECT

IDENTIFICATION STAMP
DIV. OF THE STATE ARCHITECT
APP:

INC:

REVIEWED FOR
SS
FLS
ACS
DATE:
✔
✔
✔
04-118734
06/10/2020
Incident Report – Hope Elementary School, 3010 Tamarack Ave, Carlsbad, CA 92010 Mar. 15, 2022

ATTACHMENT N

From: Michael Espudo
To: [email protected]
Cc: [email protected]; Eric Sanders; Andrew Wilson Subject: Hope Elementary Temporary Irrigation High-Line.

Date: Friday, August 28, 2020 10:27:08 AM
Good morning Andy,
Per my site visit on Thursday August 13, 2020, I had a conversation with you and Dereck about the recycled irrigation and my concerns with the changes being made.

I suggested to Derek, It would be in the best interest of the City of Carlsbad Municipal Water Department and CUSD that we high-line Hope Elementary off the old existing potable irrigation service temporarily until the completion of Hope Elementary's renovations, at which time we will conduct a full cross connection on entire site with DEH over-site on approved recycled irrigation plans, Derek is in agreement.

The next step would be getting your temporary water meter, which can be done by contacting Engineering and Land Development at (760) 602-2750
. There is $900 (refundable) deposit
and a $192 (non-refundable) rental charge for the meter.

Contact me if you have any questions, (760)802-7768.

Thanks,
Michael Espudo
Cross Connection Specialist
City of Carlsbad
Sent from my iPad

Carlsbad City CouncilMarch 24, 2022

Carlsbad City Council
March 24, 2022