Agenda packet — Diamond Bar City Council, October 6, 2026

________________________________________________________________________________________________________________________ City of Diamond Bar City Council
City of Diamond Bar
City Council
Agenda
Steve Tye, Mayor
Ruth M. Low, Mayor Pro Tem
Andrew Chou, Council Member
Stan Liu, Council Member
Chia Yu Teng, Council Member
City Manager Ryan McLean ● City Attorney Omar Sandoval ● City Clerk Kristina Santana Meeting Date: Tuesday, October 6, 2026
Regular Meeting 6:30 p.m.

South Coast Air Quality Management District/Main Auditorium 21865 Copley Drive, Diamond Bar, CA 91765

WELCOME TO A MEETING OF THE DIAMOND BAR CITY COUNCIL
Meetings are open to the public, and you are invited to attend and participate.

Agendas for regular City Council meetings are available 72 hours prior to the meeting and are posted in the City’s regular posting locations, on DBTV and on the City’s website. The City Council may take action on any item listed on the agenda.

HOW TO ACCESS THE MEETING REMOTELY
Television: Spectrum Cable Channel 3 and Frontier FiOS television Channel 47 Internet: City’s YouTube Channel (diamondbarca.gov/youtube) Listen-Only: Call +1 (562) 247-8422, Access Code: 630-437-718 Participate: Join Go To Webinar
(https://attendee.gotowebinar.com/register/1223127979528782425)

RESOURCES
Copies of agendas and agenda packets are on file and available for public inspection at the City Clerk's Office at 21810 Copley Drive, Diamond Bar, CA 91765 or online at www.diamondbarca.gov/agendas. For more information about agendas or rules of the City Council, please email the City Clerk's office ([email protected]) or call 909-839-7010.

AMERICANS WITH DISABILITY ACT ACCOMMODATION
In compliance with the Americans with Disabilities Act, if you need special assistance, a disabilityrelated modification or accommodation, agenda materials in an alternative format, or auxiliary aids to participate in this meeting, please email the City Clerk's office ([email protected]) or call 909-839-7010 as soon as possible. Providing at least 72 hours’ notice will help ensure that reasonable arrangements can be made.

PUBLIC INPUT
The public may provide public comment by attending the meeting in person, by sending an email, or by logging into the teleconference. Please email public comments to the City Clerk ([email protected]) by 4:00 p.m. on the day of the meeting and indicate in the Subject

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Diamond Bar City Council Agenda October 6, 2026
________________________________________________________________________________________________________________________ ________________________________________________________________________________________________________________________ City of Diamond Bar City Council
Line “FOR PUBLIC COMMENT.” Written comments will be distributed to the City Council Members, noted for the record at the meeting, and posted on the City’s official agenda webpage: www.diamondbarca.gov/agendas. Please note that the meeting will proceed at the South Coast Air Quality Management District/Main Auditorium should comments by teleconferencing become infeasible due to an internet or power outage, or due to technical problems outside the City's control. If you wish to make certain that your comments are heard, please attend the meeting in person or send an email by 4:00 p.m. on the day of the meeting/hearing.

Speakers are limited to five (5) minutes per agenda item, unless the Mayor determines otherwise. The Mayor may adjust this time limit depending on the number of people wishing to speak, the complexity of the matter, the length of the agenda, the hour and any other relevant consideration.

Speakers may address the Council only once on an agenda item, except during public hearings, when the applicant/appellant may be afforded a rebuttal. Any material to be submitted to the City Council at the meeting should be submitted through the City Clerk.

Public comments must be directed to the City Council. A person who disrupts the orderly conduct of the meeting after being warned by the Mayor or the Mayor’s designee that their behavior is disrupting the meeting may result in the person being removed from the meeting.

LIVE MEETING NOTICE
This meeting is being video recorded and by participating you are giving your permission to be televised. This meeting will be rebroadcast every Saturday and Sunday at 9:00 a.m. and alternate Tuesdays at 8:00 p.m.

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1. CALL TO ORDER: 6:30 p.m., Main Auditorium
PLEDGE OF ALLEGIANCE: Mayor Tye
INVOCATION: Tim Park, Lead Pastor, Evangelical Free Church ROLL CALL: Council Members Chou, Liu, Teng, Mayor Pro Tem Low, Mayor Tye APPROVAL OF AGENDA: Mayor Tye

2. SPECIAL PRESENTATIONS, CERTIFICATES, PROCLAMATIONS:

2.1 Certificate of Recognition to Aditi Chawla.

3. CITY MANAGER REPORTS AND RECOMMENDATIONS:

3.1 El Niño Preparedness.

4. PUBLIC COMMENTS:
“Public Comments” is the time reserved on each regular meeting agenda to provide an opportunity for members of the public to directly address the Council on Consent Calendar items or other matters of interest not on the agenda that are within the subject matter jurisdiction of the Council. Although the City Council values your comments, pursuant to the Brown Act, members of the City Council or Staff may briefly respond to public comments if necessary, but no extended discussion and no action on such matters may take place. There is a five-minute maximum time limit when addressing the City Council.

5. SCHEDULE OF FUTURE EVENTS:

5.1 National Coffee with a Cop Day - October 7, 2026, 8:30 - 10:00 a.m., Walnut/Diamond Bar Sheriff's Station, 21695 E. Valley Blvd., Walnut, CA

5.2 City Information and Resource Table - October 11, 2026, 9:00 - 11:00 a.m., Hannam Chain Market World, 21080 Golden Springs Dr.

5.3 Measure Q Informational Presentation - October 12, 2026, 6:30 - 8:30 p.m., City Hall Windmill Room, 21810 Copley Dr.

5.4 Planning Commission Meeting - October 13, 2026, 6:30 p.m., City Hall Windmill Room, 21810 Copley Dr.

5.5 Coffee with a Cop - October 13, 2026, 5:30 - 7:30 p.m., Paris Baguette, 21050 Golden Spring Dr.

5.6 City Government Explained Presentation: Role and Responsibilities of the City Council - October 14, 2026, 6:00 - 8:00 p.m., City Hall Windmill Room, 21810 Copley Drive

5.7 Traffic and Transportation Commission Meeting - October 15, 2026, 6:30 p.m., City Hall Windmill Room, 21810 Copley Dr.

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5.8 Measure Q Informational Presentation - October 17, 2026, 9:00 - 11:00 a.m., City Hall Windmill Room, 21810 Copley Dr.

5.9 Diamond Bar Restaurant Week - October 19, 2026 - October 25, 2026

5.10 City Council Meeting - October 20, 2026, 6:30 p.m., South Coast Air Quality Management District - Auditorium, 21865 Copley Dr.

6. CONSENT CALENDAR:

All items listed on the Consent Calendar are considered by the City Council to be routine and will be acted on by a single motion unless a City Council Member or member of the public request otherwise, in which case, the item will be removed for separate consideration.

6.1 City Council Minutes of the September 15, 2026 Regular Meeting.

Recommended Action:

Approve the September 15, 2026 Regular City Council Meeting Minutes.

6.2 Ratification of Check Register September 9, 2026 through September 22, 2026 totaling $782,547.57.

Recommended Action:

Ratify the Check Register.

7. PUBLIC HEARINGS:

7.1 Tentative Parcel Map No. 83773 Case No. PL2022-119.

Recommended Action:
• Open the public hearing to take testimony from the public. • Close the public hearing.
• Adopt Resolution No. 2026-32: Adopting the Mitigating Negative Declaration ("MND") prepared for the project and approving Tentative Parcel Map No. 83773 based on the findings of fact, and subject to the conditions of approval contained herein.

8. COUNCIL CONSIDERATION: None.

9. COUNCIL SUB-COMMITTEE REPORTS AND MEETING ATTENDANCE REPORTS:

10. ADJOURNMENT:

CERTIFICATION
I, Kristina Santana, MMC, City Clerk, City of Diamond Bar, hereby certify, under penalty of perjury under the laws of the State of California that the foregoing notice was posted pursuant to Government Code Section 54950 Et. Seq., not less than 72 hours prior to the meeting, at the following locations: Diamond Bar City Hall Kiosk, Diamond Bar City Hall Bulletin Board, City website: www.diamondbarca.gov, and Diamond Bar Library.

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Agenda Item #: 6.1
Meeting Date: October 6, 2026

CITY COUNCIL AGENDA REPORT
TO: Honorable Mayor and Members of the City Council
FROM: Ryan McLean, City Manager
SUBJECT: City Council Minutes of the September 15, 2026 Regular Meeting.

STRATEGIC GOAL: Open, Engaged and Responsive Government RECOMMENDATION:

Approve the September 15, 2026 Regular City Council Meeting Minutes.

FINANCIAL IMPACT:

None.

BACKGROUND:

Government Code Section 36814 mandates the City Clerk to keep an accurate records of the City Council's proceedings.

ANALYSIS:

Minutes have been prepared and are being presented for approval.

PREPARED BY:

Kristina Santana, City Clerk, City Clerk's Office
ATTACHMENTS:

1. September 15, 2026 City Council Regular Meeting Minutes

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CITY OF DIAMOND BAR

MINUTES OF THE CITY COUNCIL CLOSED SESSION AND REGULAR MEETING

SOUTH COAST AIR QUALITY MANAGEMENT DISTRICT/MAIN AUDITORIUM 21865 COPLEY DRIVE, DIAMOND BAR, CA 91765
SEPTEMBER 15, 2026

1. CLOSED SESSION: Mayor Tye opened the Closed Session at 5:30 p.m.

All Council Members were present.

CONFERENCE WITH LEGAL COUNSEL - ANTICIPATED LITIGATION
Initiation of litigation pursuant to Government Code Section 54956.9(d)(4):

One potential case.

No public comments were made.

Mayor Tye adjourned the Closed Session at 5:46 p.m.

2. CALL TO ORDER: Mayor Tye called the Regular City Council meeting to order at 6:30 p.m. in the South Coast Air Quality Management District Main Auditorium, 21865 Copley Drive, Diamond Bar, CA 91765.

PLEDGE OF ALLEGIANCE: Mayor Pro Tem Low led the Pledge of Allegiance.

INVOCATION: David Zacarias, Worship Minister, Landmark Church ROLL CALL: Council Members Andrew Chou, Stan Liu, Chia Yu Teng, Mayor Pro Tem Ruth M. Low, Mayor Steve Tye

Absent: None.

Staff present in person: Ryan McLean, City Manager; Omar Sandoval, City Attorney; Anthony Santos, Assistant to the City Manager; Amy Haug, Human Resources/Risk Management Director; Greg Gubman, Community Development Director; David Liu, Public Works Director/City Engineer; Cecilia Arellano, Community Relations Manager; Kristina Santana, City Clerk.

Others present: Jason Sotelo, Deputy, Diamond Bar/Walnut Sheriff’s Station; Stephen Tousey, Captain, Diamond Bar/Walnut Sheriff’s Station.

APPROVAL OF AGENDA: City Attorney Sandoval reported that the City Council met in Closed Session and the City Council unanimously approved initiation of a civil injunction action for property located at 2800 Watercourse Dr.

CM/McLean confirmed there were no changes made to the agenda. Mayor Tye approved the agenda as presented.

3. SPECIAL PRESENTATIONS, CERTIFICATES, PROCLAMATIONS: None.

4. CITY MANAGER REPORTS AND RECOMMENDATIONS: None.

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SEPTEMBER 15, 2026 PAGE 2 CITY COUNCIL

5. PUBLIC COMMENTS:

The following provided public comments:

Anthony Perri, resident
Amelia Teo, Allison Teo, Sinthia Salcido, Amara Beatty, Realize the Dream & Youth Save America
Brian Worthington, resident
Bruce Chitea, Rotary Club of Walnut Valley
Cynthia Yu, Diamond Bar Library Manager
CC/Santana reported that no emails were submitted and there were no callers on the teleconference line that requested to speak.

6. SCHEDULE OF FUTURE EVENTS: CM/McLean presented the Schedule of Future Events.

7. CONSENT CALENDAR: MPT/Low moved, C/Liu seconded, to approve the Consent Calendar. Motion carried 5-0 by the following Roll Call vote:

AYES: COUNCIL MEMBERS: Chou, Liu, Teng, MPT/Low, M/Tye
NOES: COUNCIL MEMBERS: None
ABSENT: COUNCIL MEMBERS: None

7.1 Approved September 1, 2026 Regular Council Meeting Minutes.

7.2 Ratified Check Register Dated August 26, 2026 through September 8, 2026 Totaling $1,207,937.70.

7.3 Approved the August 2026 Treasurer’s Statement.

7.4 Adopted the Hispanic Heritage Month Proclamation.

7.6 Adopted Resolution No. 2026-31 Approving the Biennial Update to the City’s Conflict of Interest for Designated City Personnel.

ITEMS WITHDRAWN FROM THE CONSENT CALENDAR:

7.5 Consultant Services Agreement with Prince Global Solutions, LLC.

C/Chou asked for more information about the decrease in the contract amount.

CM/McLean confirmed that the decrease was due to a decrease in travel cost as meetings will be held virtually instead.

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SEPTEMBER 15, 2026 PAGE 3 CITY COUNCIL
After further discussion, C/Chou moved, MPT/Low seconded, to not approve Item 7.5.

Motion carried 3-2 by the following Roll Call vote:

AYES: COUNCIL MEMBERS: Chou, Liu, MPT/Low
NOES: COUNCIL MEMBERS: Teng, M/Tye
ABSENT: COUNCIL MEMBERS: None

8. PUBLIC HEARINGS: None.

9. COUNCIL CONSIDERATION: None.

10. COUNCIL SUBCOMMITTEE REPORTS AND MEETING ATTENDANCE REPORTS:

The following Council Members provided a report on meetings attended at the expense of the local agency per Government Code 53232.3(d).

C/Teng made a motion to bring an item to Council to create a policy allowing public use of the Windmill Room. There was no second and the motion failed.

C/Chou reported attending the 9/11 Memorial at Rose Hills.

MPT/Low reported attending the Public Safety Committee meeting with Mayor Tye.

11. ADJOURNMENT: With no further business to conduct, M/Tye adjourned the Regular City Council Meeting at 7:56 p.m. in memory of Chuck Johnson.

Respectfully Submitted,
__________________________
Kristina Santana, City Clerk
The foregoing minutes are hereby approved this 6th day of October, 2026. __________________________
Steve Tye, Mayor

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Agenda Item #: 6.2
Meeting Date: October 6, 2026

CITY COUNCIL AGENDA REPORT
TO: Honorable Mayor and Members of the City Council
FROM: Ryan McLean, City Manager
SUBJECT: Ratification of Check Register September 9, 2026 through September 22, 2026 totaling $782,547.57.

STRATEGIC GOAL: Open, Engaged and Responsive Government RECOMMENDATION:

Ratify the Check Register.

FINANCIAL IMPACT:

Expenditure of $782,547.57.

BACKGROUND:

The City has established the policy of issuing accounts payable checks on a bi-weekly basis with City Council ratification at the next scheduled City Council Meeting. The attached check register containing checks dated September 9, 2026 through September 22, 2026 totaling $782,547.57 is being presented for ratification.

ANALYSIS:

All payments have been made in compliance with the City's purchasing policies and procedures. The attached Affidavit affirms that the check register has been audited and deemed accurate.

PREPARED BY:

Luisa Allen, Senior Accounting Technician, Finance
ATTACHMENTS:

1. Check Register Affidavit 10-6-2026

2. Check Register 10-6-2026

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Agenda Item #: 6.2
Meeting Date: October 6, 2026

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City of Diamond Bar Check Register
CHECK # CHECK DATE VENDOR NAME OTP VENDOR NAME INVOICE DESCRIPTION ORG OBJECT AMOUNT 20253 9/11/2026 PERS HEALTH HEALTH INSURANCE PREMIUM
SEPTEMBER 2026
100220 50062 $67.27
9/11/2026 PERS HEALTH HEALTH INSURANCE PREMIUM
SEPTEMBER 2026
239 21106 $106.95
9/11/2026 PERS HEALTH HEALTH INSURANCE PREMIUM
SEPTEMBER 2026
241 21106 $106.96
9/11/2026 PERS HEALTH HEALTH INSURANCE PREMIUM
SEPTEMBER 2026
204 21106 $145.29
9/11/2026 PERS HEALTH HEALTH INSURANCE PREMIUM
SEPTEMBER 2026
238 21106 $183.57
9/11/2026 PERS HEALTH HEALTH INSURANCE PREMIUM
SEPTEMBER 2026
203 21106 $254.24
9/11/2026 PERS HEALTH HEALTH INSURANCE PREMIUM
SEPTEMBER 2026
201 21106 $776.89
9/11/2026 PERS HEALTH HEALTH INSURANCE PREMIUM
SEPTEMBER 2026
105220 50048 $1,782.00
9/11/2026 PERS HEALTH HEALTH INSURANCE PREMIUM
SEPTEMBER 2026
250 21106 $1,967.37
9/11/2026 PERS HEALTH HEALTH INSURANCE PREMIUM
SEPTEMBER 2026
206 21106 $2,849.75
9/11/2026 PERS HEALTH HEALTH INSURANCE PREMIUM
SEPTEMBER 2026
207 21106 $3,236.09
9/11/2026 PERS HEALTH HEALTH INSURANCE PREMIUM
SEPTEMBER 2026
100 21106 $66,836.89
CHECK TOTAL $78,313.27
20254 9/11/2026 TASC FLEX SPENDING MEDICAL/CHILDCARE
09/11/2026
201 21118 $4.76
9/11/2026 TASC FLEX SPENDING MEDICAL/CHILDCARE
09/11/2026
238 21118 $6.54
9/11/2026 TASC FLEX SPENDING MEDICAL/CHILDCARE
09/11/2026
239 21118 $6.54
9/11/2026 TASC FLEX SPENDING MEDICAL/CHILDCARE
09/11/2026
241 21118 $6.54
9/11/2026 TASC FLEX SPENDING MEDICAL/CHILDCARE
09/11/2026
250 21118 $29.52
9/11/2026 TASC FLEX SPENDING MEDICAL/CHILDCARE
09/11/2026
207 21118 $45.03

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City of Diamond Bar Check Register
CHECK # CHECK DATE VENDOR NAME OTP VENDOR NAME INVOICE DESCRIPTION ORG OBJECT AMOUNT 9/11/2026 TASC FLEX SPENDING MEDICAL/CHILDCARE
09/11/2026
206 21118 $139.93
9/11/2026 TASC FLEX SPENDING MEDICAL/CHILDCARE
09/11/2026
100 21118 $1,932.17
CHECK TOTAL $2,171.03
20255 9/11/2026 VANTAGEPOINT TRNSFR AGNTS303248DEFERRED COMP

CONTRIBUTIONS/LOAN PYMTS
09/11/2026
204 21109 $137.75
9/11/2026 VANTAGEPOINT TRNSFR AGNTS303248DEFERRED COMP

CONTRIBUTIONS/LOAN PYMTS
09/11/2026
203 21109 $241.05
9/11/2026 VANTAGEPOINT TRNSFR AGNTS303248DEFERRED COMP

CONTRIBUTIONS/LOAN PYMTS
09/11/2026
239 21109 $422.55
9/11/2026 VANTAGEPOINT TRNSFR AGNTS303248DEFERRED COMP

CONTRIBUTIONS/LOAN PYMTS
09/11/2026
241 21109 $422.55
9/11/2026 VANTAGEPOINT TRNSFR AGNTS303248DEFERRED COMP

CONTRIBUTIONS/LOAN PYMTS
09/11/2026
201 21109 $473.38
9/11/2026 VANTAGEPOINT TRNSFR AGNTS303248DEFERRED COMP

CONTRIBUTIONS/LOAN PYMTS
09/11/2026
238 21109 $712.45
9/11/2026 VANTAGEPOINT TRNSFR AGNTS303248DEFERRED COMP

CONTRIBUTIONS/LOAN PYMTS
09/11/2026
207 21109 $1,008.77
9/11/2026 VANTAGEPOINT TRNSFR AGNTS303248DEFERRED COMP

CONTRIBUTIONS/LOAN PYMTS
09/11/2026
250 21109 $3,094.37
9/11/2026 VANTAGEPOINT TRNSFR AGNTS303248DEFERRED COMP

CONTRIBUTIONS/LOAN PYMTS
09/11/2026
206 21109 $3,139.26
9/11/2026 VANTAGEPOINT TRNSFR AGNTS303248DEFERRED COMP

CONTRIBUTIONS/LOAN PYMTS
09/11/2026
100 21109 $68,000.74
CHECK TOTAL $77,652.87
20256 9/11/2026 CALPERS PENSION CONTRIBUTION FOR PERIOD 08/22/26-09/04/26
204 21110 $96.20
9/11/2026 CALPERS PENSION CONTRIBUTION FOR PERIOD
08/22/26-09/04/26
239 21110 $161.16

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City of Diamond Bar Check Register
CHECK # CHECK DATE VENDOR NAME OTP VENDOR NAME INVOICE DESCRIPTION ORG OBJECT AMOUNT 9/11/2026 CALPERS PENSION CONTRIBUTION FOR PERIOD
08/22/26-09/04/26
241 21110 $161.16
9/11/2026 CALPERS PENSION CONTRIBUTION FOR PERIOD
08/22/26-09/04/26
203 21110 $168.34
9/11/2026 CALPERS PENSION CONTRIBUTION FOR PERIOD
08/22/26-09/04/26
238 21110 $255.17
9/11/2026 CALPERS PENSION CONTRIBUTION FOR PERIOD
08/22/26-09/04/26
201 21110 $434.46
9/11/2026 CALPERS PENSION CONTRIBUTION FOR PERIOD
08/22/26-09/04/26
207 21110 $1,444.04
9/11/2026 CALPERS PENSION CONTRIBUTION FOR PERIOD
08/22/26-09/04/26
250 21110 $1,713.42
9/11/2026 CALPERS PENSION CONTRIBUTION FOR PERIOD
08/22/26-09/04/26
206 21110 $1,842.61
9/11/2026 CALPERS PENSION CONTRIBUTION FOR PERIOD
08/22/26-09/04/26
100 21110 $46,041.03
CHECK TOTAL $52,317.59
20257 9/11/2026 AFSCME DISTRICT COUNCIL 36 UNION DUES FOR 09/11/26 AFSCME LOCAL 917
100 21119 $171.60
CHECK TOTAL $171.60
20258 9/15/2026 CALPERS FEES FOR GASB-68 REPORTS &
SCHEDULES 06/30/26
100210 54010 $350.00
CHECK TOTAL $350.00
20259 9/15/2026 SOUTHERN CALIFORNIA EDISON TRAFFIC CONTROL - 20791 GOLDEN SPRINGS - TC-1
100655 52210 $137.32
CHECK TOTAL $137.32
20260 9/15/2026 SOUTHERN CALIFORNIA EDISON TRAFFIC CONTROL - 20439 GOLDEN SPRINGS - TC-1
100655 52210 $132.84
CHECK TOTAL $132.84
20261 9/21/2026 SOUTHERN CALIFORNIA EDISON 1355 MAPLE HILL PARK (081226-091026) 100630 52210 $346.05 CHECK TOTAL $346.05
20265 9/21/2026 SOUTHERN CALIFORNIA EDISON D41/20980 E CYN RIDGE LN SPKL (081226-091026)
241641 52210 $15.68
CHECK TOTAL $15.68
20266 9/21/2026 SOUTHERN CALIFORNIA EDISON D41/20850 HIGH CNTRY PED (081226- 091026)
241641 52210 $15.68
CHECK TOTAL $15.68

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City of Diamond Bar Check Register
CHECK # CHECK DATE VENDOR NAME OTP VENDOR NAME INVOICE DESCRIPTION ORG OBJECT AMOUNT 20269 9/21/2026 SOUTHERN CALIFORNIA EDISON PARKS/21208 WASHINGTON AVE PED (081226-091026)
100630 52210 $43.52
CHECK TOTAL $43.52
20273 9/17/2026 SOUTHERN CALIFORNIA EDISON SAFETY LIGHTS - 2746 BREA CYN BPED - LS-3
100655 52210 $150.91
CHECK TOTAL $150.91
20274 9/17/2026 SOUTHERN CALIFORNIA EDISON SAFETY LIGHTS - 3564 S BREA CYN BPED - LS-3
100655 52210 $81.48
CHECK TOTAL $81.48
20275 9/17/2026 SOUTHERN CALIFORNIA EDISON TRAFFIC CONTROL - 1611 S BREA CYN - TC-1
100655 52210 $85.24
CHECK TOTAL $85.24
20276 9/17/2026 SOUTHERN CALIFORNIA EDISON GS-1 - 1215 S BREA CYN - GS-1 100655 52210 $104.57 CHECK TOTAL $104.57
20277 9/17/2026 SOUTHERN CALIFORNIA EDISON TRAFFIC CONTROL - 21250 GOLDEN SPRINGS - TC-1
100655 52210 $96.43
CHECK TOTAL $96.43
20278 9/17/2026 SOUTHERN CALIFORNIA EDISON GS-1 - 2838 S DBB PED - GS-1 100655 52210 $115.03 CHECK TOTAL $115.03
20279 9/17/2026 SOUTHERN CALIFORNIA EDISON TRAFFIC CONTROL - 717 GRAND AVE - TC-1
100655 52210 $165.50
CHECK TOTAL $165.50
20280 9/17/2026 SOUTHERN CALIFORNIA EDISON TRAFFIC CONTROL - 801 S LEMON/VARIOUS - TC-1
100655 52210 $349.71
CHECK TOTAL $349.71
20281 9/17/2026 SOUTHERN CALIFORNIA EDISON TRAFFIC CONTROL - 20781 PATHFINDER - TC-1
100655 52210 $125.61
CHECK TOTAL $125.61
20282 9/17/2026 SOUTHERN CALIFORNIA EDISON GS-1 - 23331 GOLDEN SPRINGS - GS-1 100655 52210 $95.92 CHECK TOTAL $95.92
20284 9/22/2026 AFLAC SUPP INSURANCE PREMIUM AUGUST
2026
239 21117 $0.94
9/22/2026 AFLAC SUPP INSURANCE PREMIUM AUGUST
2026
241 21117 $0.94

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City of Diamond Bar Check Register
CHECK # CHECK DATE VENDOR NAME OTP VENDOR NAME INVOICE DESCRIPTION ORG OBJECT AMOUNT 9/22/2026 AFLAC SUPP INSURANCE PREMIUM AUGUST
2026
201 21117 $8.47
9/22/2026 AFLAC SUPP INSURANCE PREMIUM AUGUST
2026
204 21117 $9.02
9/22/2026 AFLAC SUPP INSURANCE PREMIUM AUGUST
2026
203 21117 $15.80
9/22/2026 AFLAC SUPP INSURANCE PREMIUM AUGUST
2026
207 21117 $30.01
9/22/2026 AFLAC SUPP INSURANCE PREMIUM AUGUST
2026
250 21117 $108.23
9/22/2026 AFLAC SUPP INSURANCE PREMIUM AUGUST
2026
206 21117 $194.99
9/22/2026 AFLAC SUPP INSURANCE PREMIUM AUGUST
2026
100 21117 $1,383.62
CHECK TOTAL $1,752.02
20285 9/22/2026 BLUETRITON BRANDS INC WATER DELIVERY SERVICE (CITYHALL 081326-091226)
100620 51200 $428.63
CHECK TOTAL $428.63
20286 9/22/2026 CORODATA MEDIA STORAGE
INC

DAILY TAPE ROTATION & STORAGE -
AUG 2026
100230 54030 $857.78
CHECK TOTAL $857.78
20287 9/22/2026 DAPEER ROSENBLIT & LITVAK LLP SPECIAL LEGAL COUNSEL CODE ENFORC AUG 26
100120 54024 $2,180.48
9/22/2026 DAPEER ROSENBLIT & LITVAK LLP SPECIAL LEGAL COUNSEL CODE ENFORC AUG 26
100120 54024 $912.70
9/22/2026 DAPEER ROSENBLIT & LITVAK LLP SPECIAL LEGAL COUNSEL CODE ENFORC AUG 26
100120 54024 $3,168.34
9/22/2026 DAPEER ROSENBLIT & LITVAK LLP SPECIAL LEGAL COUNSEL CODE ENFORC AUG 26
100120 54024 $2,972.70
9/22/2026 DAPEER ROSENBLIT & LITVAK LLP SPECIAL LEGAL COUNSEL CODE ENFORC AUG 26
100120 54024 $5,750.00
CHECK TOTAL $14,984.22
20288 9/22/2026 DELTA DENTAL HMO DENTAL INSURANCE PREMIUM SEPTEMBER 2026
250 21105 $0.66
9/22/2026 DELTA DENTAL HMO DENTAL INSURANCE PREMIUM
SEPTEMBER 2026
206 21105 $0.96
9/22/2026 DELTA DENTAL HMO DENTAL INSURANCE PREMIUM
SEPTEMBER 2026
207 21105 $0.96

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City of Diamond Bar Check Register
CHECK # CHECK DATE VENDOR NAME OTP VENDOR NAME INVOICE DESCRIPTION ORG OBJECT AMOUNT 9/22/2026 DELTA DENTAL HMO DENTAL INSURANCE PREMIUM
SEPTEMBER 2026
201 21105 $1.61
9/22/2026 DELTA DENTAL HMO DENTAL INSURANCE PREMIUM
SEPTEMBER 2026
100 21105 $159.45
CHECK TOTAL $163.64
20289 9/22/2026 DELTA DENTAL INSURANCE

COMPANY

PPO DENTAL INSURANCE PREMIUM
SEPTEMBER 2026
204 21105 $8.23
9/22/2026 DELTA DENTAL INSURANCE

COMPANY

PPO DENTAL INSURANCE PREMIUM
SEPTEMBER 2026
203 21105 $14.40
9/22/2026 DELTA DENTAL INSURANCE

COMPANY

PPO DENTAL INSURANCE PREMIUM
SEPTEMBER 2026
239 21105 $21.30
9/22/2026 DELTA DENTAL INSURANCE

COMPANY

PPO DENTAL INSURANCE PREMIUM
SEPTEMBER 2026
241 21105 $21.30
9/22/2026 DELTA DENTAL INSURANCE

COMPANY

PPO DENTAL INSURANCE PREMIUM
SEPTEMBER 2026
238 21105 $35.92
9/22/2026 DELTA DENTAL INSURANCE

COMPANY

PPO DENTAL INSURANCE PREMIUM
SEPTEMBER 2026
201 21105 $46.88
9/22/2026 DELTA DENTAL INSURANCE

COMPANY

PPO DENTAL INSURANCE PREMIUM
SEPTEMBER 2026
250 21105 $196.73
9/22/2026 DELTA DENTAL INSURANCE

COMPANY

PPO DENTAL INSURANCE PREMIUM
SEPTEMBER 2026
207 21105 $197.55
9/22/2026 DELTA DENTAL INSURANCE

COMPANY

PPO DENTAL INSURANCE PREMIUM
SEPTEMBER 2026
206 21105 $239.47
9/22/2026 DELTA DENTAL INSURANCE

COMPANY

PPO DENTAL INSURANCE PREMIUM
SEPTEMBER 2026
100 21105 $4,499.56
CHECK TOTAL $5,281.34
20290 9/22/2026 DEPARTMENT OF JUSTICE LIVESCAN FEES - JULY 100220 52510 $160.00 9/22/2026 DEPARTMENT OF JUSTICE LIVESCAN FEES - AUGUST 100220 52510 $32.00 CHECK TOTAL $192.00
20291 9/22/2026 DIAMOND BAR STORAGE

OWNER LLC
COMM DEV DEPT STOR UNITS 092 AND
376 OCT 26
100420 52302 $1,012.00
CHECK TOTAL $1,012.00
20292 9/22/2026 FACILITY SOLUTIONS GROUP INC RETENTION CONTRACT WITHHOLDING:
26000023
301 29004 $2,914.32
CHECK TOTAL $2,914.32
20293 9/22/2026 FEDERAL EXPRESS

CORPORATION
LATE FEE FROM INVOICE #9-366-23314 100140 52170 $6.34

Page 18 of 105 ends

City of Diamond Bar Check Register
CHECK # CHECK DATE VENDOR NAME OTP VENDOR NAME INVOICE DESCRIPTION ORG OBJECT AMOUNT CHECK TOTAL $6.34
20294 9/22/2026 FRESHMOBILECA LLC FLEET VEHICLE WASHING SERVICE (090426)
502130 52312 $39.90
9/22/2026 FRESHMOBILECA LLC FLEET VEHICLE WASHING SERVICE (090426)
502430 52312 $79.80
9/22/2026 FRESHMOBILECA LLC FLEET VEHICLE WASHING SERVICE (090426)
502620 52312 $79.80
9/22/2026 FRESHMOBILECA LLC FLEET VEHICLE WASHING SERVICE (090426)
502655 52312 $79.80
9/22/2026 FRESHMOBILECA LLC FLEET VEHICLE WASHING SERVICE (090426)
502630 52312 $119.70
CHECK TOTAL $399.00
20295 9/22/2026 FRONTIER COMMUNICATIONS
CORP

SUMMARY BILL/INTERNET SERVICE - SEP
2026
100230 54030 $800.00
9/22/2026 FRONTIER COMMUNICATIONS
CORP

SUMMARY BILL/INTERNET SERVICE - AUG
2026
100230 54030 $593.18
CHECK TOTAL $1,393.18
20296 9/22/2026 GERGIS BEBAWY CDBG/AREA 6 RES ADA CURB RAMP PROJECT - FY 26-27
225610 56101 $84,342.71
CHECK TOTAL $84,342.71
20297 9/22/2026 GOGO TECHNOLOGIES INC FY 26-27 DIAMOND RIDE SR TRANS SVCS - JULY 2026
206650 55560 $38,882.99
CHECK TOTAL $38,882.99
20298 9/22/2026 GOVCONNECTION INC ANNUAL RENEWAL - ADOBE ACROBAT - FY 26-27
100230 52314 $2,658.80
CHECK TOTAL $2,658.80
20299 9/22/2026 HANSON BRIDGETT LLP AUGUST 2026 LEGAL SERVICES - SEWER

DISTRICT
100120 54022 $13,858.80
CHECK TOTAL $13,858.80
20300 9/22/2026 HELIX ENVIRONMENTAL

PLANNING INC

CANYON LOOP TRAIL RESTORATION -
AUG 2026
301630 56104 $5,999.98
CHECK TOTAL $5,999.98
20301 9/22/2026 HOME DEPOT CREDIT SERVICES OPERATING SUPPLIES (JW-091126) 100630 51300 $378.24 9/22/2026 HOME DEPOT CREDIT SERVICES RAOD MAINTENANCE SUPPLIES (JSI 090826)
100655 51250 $31.44
CHECK TOTAL $409.68

Page 19 of 105 ends

City of Diamond Bar Check Register
CHECK # CHECK DATE VENDOR NAME OTP VENDOR NAME INVOICE DESCRIPTION ORG OBJECT AMOUNT 20302 9/22/2026 HUMANE SOCIETY OF POMONA

VALLEY INC

ANIMAL CONTROL SERVICES IN AUG
2026
100340 55404 $48,677.92
CHECK TOTAL $48,677.92
20303 9/22/2026 HYDROPOINT DATA SYSTEMS INC WEATHERTRAK SERVICE - IRR CONTROLLERS @ PONY FIELD
100630 52320 $3,549.00
CHECK TOTAL $3,549.00
20304 9/22/2026 IRIS GROUP HOLDINGS LLC CITYHALL (MONITOR EXTND SVS 092926- 0102826)
100620 52320 $54.06
CHECK TOTAL $54.06
20305 9/22/2026 JORGE LARA SENIOR DANCE CATERING 100520 55310 $1,848.66 CHECK TOTAL $1,848.66
20306 9/22/2026 LANDSCAPE STRUCTURES INC LARKSTONE PARK PLAYGROUND EQUIP 100630 52320 $580.55 CHECK TOTAL $580.55
20307 9/22/2026 LEE CHEN MAO PC STIPEND JULY 2026 100410 52525 $65.00 CHECK TOTAL $65.00
20308 9/22/2026 MCE CORPORATION ROAD MAINTENANCE SERVICES (08/2026)
201655 55530 $2,065.24
9/22/2026 MCE CORPORATION ROAD MAINTENANCE SERVICES
(08/2026)
100655 55530 $9,525.71
9/22/2026 MCE CORPORATION ROAD MAINTENANCE SERVICES
(08/2026)
100655 55528 $13,024.69
CHECK TOTAL $24,615.64
20309 9/22/2026 METROPOLITAN

TRANSPORTATION COMMISSION

ANNUAL SUBSCRIPTION - STREETSAVER -
FY 26-27
100230 52314 $3,500.00
CHECK TOTAL $3,500.00
20310 9/22/2026 NOVA LANDSCAPE GROUP INC LANDSCAPE MAINTENANCE SERVICES (PARKS / JULY 2026)
201630 55505 $2,106.63
9/22/2026 NOVA LANDSCAPE GROUP INC LANDSCAPE MAINTENANCE SERVICES (PARKS / JULY 2026)
100510 52320 $5,166.92
9/22/2026 NOVA LANDSCAPE GROUP INC LANDSCAPE MAINTENANCE SERVICES (PARKS / JULY 2026)
100630 55505 $44,870.63
9/22/2026 NOVA LANDSCAPE GROUP INC LANDSCAPE MAINTENANCE SERVICES (PARKS/ AUG 2026)
100510 55505 $1,883.84
9/22/2026 NOVA LANDSCAPE GROUP INC LANDSCAPE MAINTENANCE SERVICES (PARKS/ AUG 2026)
201630 55505 $2,106.63

Page 20 of 105 ends

City of Diamond Bar Check Register
CHECK # CHECK DATE VENDOR NAME OTP VENDOR NAME INVOICE DESCRIPTION ORG OBJECT AMOUNT 9/22/2026 NOVA LANDSCAPE GROUP INC LANDSCAPE MAINTENANCE SERVICES (PARKS/ AUG 2026)
100510 52320 $3,283.08
9/22/2026 NOVA LANDSCAPE GROUP INC LANDSCAPE MAINTENANCE SERVICES (PARKS/ AUG 2026)
100630 55505 $44,870.63
CHECK TOTAL $104,288.36
20311 9/22/2026 OFFICE SOLUTIONS OFFICE SUPPLIES - AUGUST 2026 100520 51200 $349.51 9/22/2026 OFFICE SOLUTIONS OFFICE SUPPLIES - AUGUST 2026 100140 51200 $771.20 CHECK TOTAL $1,120.71
20312 9/22/2026 ONE TIME PAY VENDOR BARBARA WHITSITT RECREATION PROGRAM REFUND 100 20202 $95.00 CHECK TOTAL $95.00
20313 9/22/2026 ONE TIME PAY VENDOR EDUARDO FLORES FACILITY REFUND 100 20202 $200.00 CHECK TOTAL $200.00
20314 9/22/2026 ONE TIME PAY VENDOR ELLA CHAU FACILITY REFUND 100 20202 $200.00 CHECK TOTAL $200.00
20315 9/22/2026 ONE TIME PAY VENDOR FARWA RAZVI FACILITY REFUND 100 20202 $500.00 CHECK TOTAL $500.00
20316 9/22/2026 ONE TIME PAY VENDOR KRISTINA DIAZ FACILITY REFUND 100 20202 $1,250.00 CHECK TOTAL $1,250.00
20317 9/22/2026 ONE TIME PAY VENDOR LENNAVIKA GOODWIN FACILITY REFUND 100 20202 $100.00 CHECK TOTAL $100.00
20318 9/22/2026 ONE TIME PAY VENDOR PATRICIA DE LA ROCA RECREATION PROGRAM REFUND 100 20202 $190.00 CHECK TOTAL $190.00
20319 9/22/2026 ONE TIME PAY VENDOR SOUHA JOUHAR FACILITY REFUND 100 20202 $300.00 CHECK TOTAL $300.00
20320 9/22/2026 ONE TIME PAY VENDOR UP UP AND AWAY FACE

PAINT, LLC
GRANDPARENTS DAY VENDOR 100520 55310 $620.00
CHECK TOTAL $620.00
20321 9/22/2026 ONE TIME PAY VENDOR BECHTEL

INFRASTRUCTURE &

POWER CORP
UNCLAIMED FUNDS - EN 16-2833 100 22113 $3,268.63
CHECK TOTAL $3,268.63

Page 21 of 105 ends

City of Diamond Bar Check Register
CHECK # CHECK DATE VENDOR NAME OTP VENDOR NAME INVOICE DESCRIPTION ORG OBJECT AMOUNT 20322 9/22/2026 ONE TIME PAY VENDOR CHARTER

COMMUNICATIONS

UNCLAIMED FUNDS - VARIOUS

ACCOUNTS
100 22113 $29,660.00
CHECK TOTAL $29,660.00
20323 9/22/2026 ONE TIME PAY VENDOR HARBHAJAN MAND UNCLAIMED FUNDS-PL 2018-0045 100 22112 $1,108.95 CHECK TOTAL $1,108.95
20324 9/22/2026 ONE TIME PAY VENDOR STREETWISE CATERING, LLC
SENIOR DANCE CATERING 100520 55310 $1,644.75
CHECK TOTAL $1,644.75
20325 9/22/2026 ONE TIME PAY VENDOR - CND
REFUND
MA RAIN GUTTERS INC C&D REFUND: 852 GLENWICK AVE 100 22105 $250.00 CHECK TOTAL $250.00
20326 9/22/2026 ONE TIME PAY VENDOR - CND
REFUND

SOCAL ROOFING

SOLUTIONS
C&D REFUND: 22455 BIRDS EYE DR 100 22105 $250.00
CHECK TOTAL $250.00
20327 9/22/2026 ONE TIME PAY VENDOR - CND
REFUND

SOCAL ROOFING

SOLUTIONS
C&D REFUND: 21105 TRIGGER LN 100 22105 $250.00
CHECK TOTAL $250.00
20328 9/22/2026 PAPER RECYCLING &

SHREDDING

9.14.26 PAPER SHREDDING SERVICE -
CH 2 CONSOLES
250170 55000 $120.00
CHECK TOTAL $120.00
20329 9/22/2026 PRO1PRINT, LLC SIGNS FOR INFORMATIONAL
PRESENTATIONS 2026
100240 52110 $220.10
9/22/2026 PRO1PRINT, LLC BEERFEST TASTE OF VENDOR TABLETOP SIGNS
100240 52110 $45.99
CHECK TOTAL $266.09
20330 9/22/2026 PUBLIC STORAGE #23051 COMMUNITY RELATIONS OFFSITE

STORAGE UNIT RENTAL
100240 52302 $1,045.00
9/22/2026 PUBLIC STORAGE #23051 PARKS AND RECREATION OFF SITE

STORAGE UNITS
100520 52302 $1,262.00
9/22/2026 PUBLIC STORAGE #23051 PARKS AND RECREATION OFF SITE

STORAGE UNITS
100520 52302 $1,010.00
CHECK TOTAL $3,317.00
20331 9/22/2026 PYRO COMM SYSTEMS INC DBC FIRE ALARM TESTING (091126) 100510 52320 $585.00 CHECK TOTAL $585.00
20332 9/22/2026 QUADIENT FINANCE USA INC 7900044080815586 POSTAGE 100140 52170 $5,010.00

Page 22 of 105 ends

City of Diamond Bar Check Register
CHECK # CHECK DATE VENDOR NAME OTP VENDOR NAME INVOICE DESCRIPTION ORG OBJECT AMOUNT CHECK TOTAL $5,010.00
20333 9/22/2026 REGIONAL TAP SERVICE CENTER FOOTHILL PASSES - AUGUST 2026 206650 55610 $389.82 9/22/2026 REGIONAL TAP SERVICE CENTER FOOTHILL PASSES - AUGUST 2026 206650 55620 $1,559.28 CHECK TOTAL $1,949.10
20334 9/22/2026 REINBERGER CORPORATION BUSINESS CARDS 100140 52110 $89.79 CHECK TOTAL $89.79
20335 9/22/2026 RETAIL MARKETING SERVICES INC CART RETRIEVAL SERVICES - AUGUST 2026
250170 55000 $5.00
CHECK TOTAL $5.00
20336 9/22/2026 RICARDO MOJICA GRANDPARENTS DAY VENDOR 100520 55310 $400.00 CHECK TOTAL $400.00
20337 9/22/2026 ROTH STAFFING COMPANIES, LP TEMP STAFFING - FINANCE WK 8/9/2026 100210 54900 $1,420.80 9/22/2026 ROTH STAFFING COMPANIES, LP TEMP STAFFING - FINANCE WK 8/30/2026
100210 54900 $1,420.80
9/22/2026 ROTH STAFFING COMPANIES, LP TEMP STAFFING - FINANCE WK 9/6/2026 100210 54900 $1,420.80 CHECK TOTAL $4,262.40
20338 9/22/2026 RUBEN TORRES PC STIPEND JULY 2026 100410 52525 $65.00 CHECK TOTAL $65.00
20339 9/22/2026 SAMANTHA SHERDEL HEALTHY DB ENTERTAINMENT 100520 55300 $375.00 CHECK TOTAL $375.00
20340 9/22/2026 SAN GABRIEL CONSERVATION
CORP

8.8.26 PAPER SHRED & E-WASTE

COLLECTION - STAFF
250170 55000 $1,886.80
CHECK TOTAL $1,886.80
20341 9/22/2026 SOUTH COAST AIR QUALITY

MANAGEMENT DISTRICT

FACILITY LEASE PAYMENT FOR OCTOBER
2026
100130 52302 $2,824.69
CHECK TOTAL $2,824.69
20342 9/22/2026 STANDARD INSURANCE

COMPANY

LIFE/SUPP LIFE/LTD/STD INSURANCE
PREMIUM SEP 2026
204 21107 $1.99
9/22/2026 STANDARD INSURANCE

COMPANY

LIFE/SUPP LIFE/LTD/STD INSURANCE
PREMIUM SEP 2026
239 21107 $2.20
9/22/2026 STANDARD INSURANCE

COMPANY

LIFE/SUPP LIFE/LTD/STD INSURANCE
PREMIUM SEP 2026
241 21107 $2.20

Page 23 of 105 ends

City of Diamond Bar Check Register
CHECK # CHECK DATE VENDOR NAME OTP VENDOR NAME INVOICE DESCRIPTION ORG OBJECT AMOUNT 9/22/2026 STANDARD INSURANCE

COMPANY

LIFE/SUPP LIFE/LTD/STD INSURANCE
PREMIUM SEP 2026
238 21107 $3.32
9/22/2026 STANDARD INSURANCE

COMPANY

LIFE/SUPP LIFE/LTD/STD INSURANCE
PREMIUM SEP 2026
203 21107 $3.48
9/22/2026 STANDARD INSURANCE

COMPANY

LIFE/SUPP LIFE/LTD/STD INSURANCE
PREMIUM SEP 2026
204 21113 $7.52
9/22/2026 STANDARD INSURANCE

COMPANY

LIFE/SUPP LIFE/LTD/STD INSURANCE
PREMIUM SEP 2026
239 21113 $9.49
9/22/2026 STANDARD INSURANCE

COMPANY

LIFE/SUPP LIFE/LTD/STD INSURANCE
PREMIUM SEP 2026
241 21113 $9.49
9/22/2026 STANDARD INSURANCE

COMPANY

LIFE/SUPP LIFE/LTD/STD INSURANCE
PREMIUM SEP 2026
203 21113 $13.18
9/22/2026 STANDARD INSURANCE

COMPANY

LIFE/SUPP LIFE/LTD/STD INSURANCE
PREMIUM SEP 2026
238 21113 $14.52
9/22/2026 STANDARD INSURANCE

COMPANY

LIFE/SUPP LIFE/LTD/STD INSURANCE
PREMIUM SEP 2026
207 21107 $21.04
9/22/2026 STANDARD INSURANCE

COMPANY

LIFE/SUPP LIFE/LTD/STD INSURANCE
PREMIUM SEP 2026
201 21107 $24.51
9/22/2026 STANDARD INSURANCE

COMPANY

LIFE/SUPP LIFE/LTD/STD INSURANCE
PREMIUM SEP 2026
201 21113 $29.96
9/22/2026 STANDARD INSURANCE

COMPANY

LIFE/SUPP LIFE/LTD/STD INSURANCE
PREMIUM SEP 2026
206 21107 $47.05
9/22/2026 STANDARD INSURANCE

COMPANY

LIFE/SUPP LIFE/LTD/STD INSURANCE
PREMIUM SEP 2026
207 21113 $84.40
9/22/2026 STANDARD INSURANCE

COMPANY

LIFE/SUPP LIFE/LTD/STD INSURANCE
PREMIUM SEP 2026
250 21107 $92.04
9/22/2026 STANDARD INSURANCE

COMPANY

LIFE/SUPP LIFE/LTD/STD INSURANCE
PREMIUM SEP 2026
250 21113 $109.25
9/22/2026 STANDARD INSURANCE

COMPANY

LIFE/SUPP LIFE/LTD/STD INSURANCE
PREMIUM SEP 2026
206 21113 $118.88
9/22/2026 STANDARD INSURANCE

COMPANY

LIFE/SUPP LIFE/LTD/STD INSURANCE
PREMIUM SEP 2026
100 21107 $1,605.81
9/22/2026 STANDARD INSURANCE

COMPANY

LIFE/SUPP LIFE/LTD/STD INSURANCE
PREMIUM SEP 2026
100 21113 $2,521.35
CHECK TOTAL $4,721.68
20343 9/22/2026 STAY GREEN INC LANDSCAPE MAINTENANCE (CITY HALL/ SEPT 2026)
100630 52320 $1,250.00
9/22/2026 STAY GREEN INC AS NEEDED REPAIRS (CITYHALL 090926 -

COUPLING)
100630 52320 $1,029.00

Page 24 of 105 ends

City of Diamond Bar Check Register
CHECK # CHECK DATE VENDOR NAME OTP VENDOR NAME INVOICE DESCRIPTION ORG OBJECT AMOUNT 9/22/2026 STAY GREEN INC AS NEEDED REPAIR CITYHALL-SPKLR

CAPS/BRKN LATERAL
100630 52320 $793.00
CHECK TOTAL $3,072.00
20344 9/22/2026 SURENDRA R MEHTA PC STIPEND JULY 2026 100410 52525 $65.00 CHECK TOTAL $65.00
20345 9/22/2026 THE DOT PRINTER, INC SEPTEMBER 2026 FOUR-PAGE CITY

NEWSLETTER
100240 52110 $2,569.90
CHECK TOTAL $2,569.90
20346 9/22/2026 THE SAN GABRIEL VALLEY

NEWSPAPER GR
LEGAL AD PL2026-31 MOSAIC 100 22107 $1,117.51
9/22/2026 THE SAN GABRIEL VALLEY

NEWSPAPER GR
LEGAL AD PL2026-37 100 22107 $840.12
CHECK TOTAL $1,957.63
20347 9/22/2026 THOMAS DONINI 9.10.26 SENIOR DANCE 100520 55310 $450.00 9/22/2026 THOMAS DONINI AUGUST SENIOR DANCE 100520 55310 $450.00 CHECK TOTAL $900.00
20348 9/22/2026 TYLER TECHNOLOGIES INC ELM PROJECT MGMT HOURS - 9/2/26- 9/3/26
503230 56135 $3,600.00
CHECK TOTAL $3,600.00
20349 9/22/2026 ULINE INC SUPPLIES FOR HALLOWEEN PARTY AND

VETERANS
100520 51200 $454.04
CHECK TOTAL $454.04
20350 9/22/2026 UNDERGROUND SERVICE ALERT

OF SO CA
US DIGALERT/CA STATE FEE - SEP 2026 100610 54900 $95.46 9/22/2026 UNDERGROUND SERVICE ALERT

OF SO CA

CA DIGALERT/MONTHLY SERVICE
CHARGES - AUG 2026
100610 54900 $249.55
CHECK TOTAL $345.01
20351 9/22/2026 UNITED STATES POSTAL SERVICE BULK PERMIT 3339 RENEWAL 2026 100240 52170 $390.00 CHECK TOTAL $390.00
20352 9/22/2026 VALLEY VISTA SERVICES, INC. STREET SWEEPING SERVICES (AUGUST 2026)
100655 55510 $11,431.80
CHECK TOTAL $11,431.80
20353 9/22/2026 VISION SERVICE PLAN VISION INSURANCE PREMIUM SEPTEMBER 2026
204 21108 $3.22

Page 25 of 105 ends

City of Diamond Bar Check Register
CHECK # CHECK DATE VENDOR NAME OTP VENDOR NAME INVOICE DESCRIPTION ORG OBJECT AMOUNT 9/22/2026 VISION SERVICE PLAN VISION INSURANCE PREMIUM
SEPTEMBER 2026
203 21108 $5.63
9/22/2026 VISION SERVICE PLAN VISION INSURANCE PREMIUM
SEPTEMBER 2026
239 21108 $6.95
9/22/2026 VISION SERVICE PLAN VISION INSURANCE PREMIUM
SEPTEMBER 2026
241 21108 $6.95
9/22/2026 VISION SERVICE PLAN VISION INSURANCE PREMIUM
SEPTEMBER 2026
238 21108 $12.16
9/22/2026 VISION SERVICE PLAN VISION INSURANCE PREMIUM
SEPTEMBER 2026
201 21108 $19.06
9/22/2026 VISION SERVICE PLAN VISION INSURANCE PREMIUM
SEPTEMBER 2026
207 21108 $72.11
9/22/2026 VISION SERVICE PLAN VISION INSURANCE PREMIUM
SEPTEMBER 2026
250 21108 $73.17
9/22/2026 VISION SERVICE PLAN VISION INSURANCE PREMIUM
SEPTEMBER 2026
206 21108 $104.07
9/22/2026 VISION SERVICE PLAN VISION INSURANCE PREMIUM
SEPTEMBER 2026
100 21108 $1,822.67
CHECK TOTAL $2,125.99
20354 9/22/2026 WW GRAINGER INC MAINTENANCE SUPPLIES (CB 091426) 100620 52320 $81.00 CHECK TOTAL $81.00
20355 9/22/2026 WALNUT VALLEY UNIFIED

SCHOOL DISTRICT
ADULT VOLLEYBALL GYM RENTAL 100520 52302 $1,155.15
CHECK TOTAL $1,155.15
20356 9/22/2026 WALNUT VALLEY WATER DISTRICT CITYHALLW (080126-083126) 100620 52220 $1,366.81 9/22/2026 WALNUT VALLEY WATER DISTRICT D38W - (080126-083126) 238638 52220 $18,085.22 9/22/2026 WALNUT VALLEY WATER DISTRICT D38(R)W - (080126-083126) 238638 52220 $2,792.11 9/22/2026 WALNUT VALLEY WATER DISTRICT D39W - (080126-083126) 239639 52220 $12,762.70 9/22/2026 WALNUT VALLEY WATER DISTRICT D41W - (080126-083126) 241641 52220 $8,033.82 9/22/2026 WALNUT VALLEY WATER DISTRICT DBCW - (080126-083126) 100510 52220 $780.39 9/22/2026 WALNUT VALLEY WATER DISTRICT PARKSW - (080126-083126) 100630 52220 $49,080.74 9/22/2026 WALNUT VALLEY WATER DISTRICT PARKS(R)W - (080126-083126) 100630 52220 $2,136.12 CHECK TOTAL $95,037.91
20357 9/22/2026 WAXIE SANITARY SUPPLY JANITORIAL SUPPLIES (HERITAGE PARK) 100630 51200 $214.57

Page 26 of 105 ends

City of Diamond Bar Check Register
CHECK # CHECK DATE VENDOR NAME OTP VENDOR NAME INVOICE DESCRIPTION ORG OBJECT AMOUNT 9/22/2026 WAXIE SANITARY SUPPLY JANITORIAL SUPPLIES (DBC) 100510 51210 $330.81 9/22/2026 WAXIE SANITARY SUPPLY JANITORIAL SUPPLIES (CITYHALL) 100620 51200 $85.56 9/22/2026 WAXIE SANITARY SUPPLY JANITORIAL SUPPLIES (DBC) 100510 51210 $56.14 CHECK TOTAL $687.08
20358 9/22/2026 WEST COAST ARBORISTS INC CITYWIDE TREE MAINTENANCE (081626- 083126)
100645 55522 $2,370.00
CHECK TOTAL $2,370.00
20359 9/22/2026 WILLDAN GEOTECHNICAL BUILDING & SAFETY INTERIM AUG 26 100420 55100 $13,600.00 CHECK TOTAL $13,600.00
20360 9/22/2026 WILLIAM AUSTIN RAWLINGS PC STIPEND JULY 2026 100410 52525 $65.00 CHECK TOTAL $65.00
GRAND TOTAL $782,547.57

Page 27 of 105 ends

Agenda Item #: 7.1
Meeting Date: October 6, 2026

CITY COUNCIL AGENDA REPORT
TO: Honorable Mayor and Members of the City Council
FROM: Ryan McLean, City Manager
SUBJECT: Tentative Parcel Map No. 83773 Case No. PL2022-119.

STRATEGIC GOAL: Open, Engaged and Responsive Government RECOMMENDATION:
• Open the public hearing to take testimony from the public. • Close the public hearing.
• Adopt Resolution No. 2026-32: Adopting the Mitigating Negative Declaration ("MND") prepared for the project and approving Tentative Parcel Map No. 83773 based on the findings of fact, and subject to the conditions of approval contained herein.

FINANCIAL IMPACT:

None. All staff and consultant costs to process the Tentative Parcel Map application have been borne by the applicant.

BACKGROUND:

Summary
The applicant is requesting City approval to subdivide an existing 100,188 square-foot (2.3-acre) lot developed with an existing single-family residence into two lots for the future development of a new single-family residence on the newly created lot. Proposed Parcel 1 is 48,352 square feet (1.11 acres) and proposed Parcel 2 is 51,836 square feet (1.19 acres). The existing single-family residence will remain on proposed Parcel 1 and a new single-family residence will be proposed on proposed Parcel 2 at a future time.

Planning Commission Recommendation
On September 8, 2026, the Planning Commission conducted a duly noticed public hearing to consider the subdivision. By a 5-0 vote, the Planning Commission adopted Resolution No. 2026-11, recommending that the City Council approve the proposed Tentative Parcel Map, subject to conditions. The Planning Commission staff report is included as Attachment 4 and meeting minutes are included as Attachment 6.

Public Comments Received

Page 28 of 105 ends

Agenda Item #: 7.1
Meeting Date: October 6, 2026
No members of the public spoke at the public hearing. On August 27, 2026, prior to the Planning Commission hearing, and again on September 25, 2026, staff received correspondence from a resident stating that public records indicate the subject lot is 1.79 acres and, therefore, the subdivision does not comply with the City’s minimum lot size requirement of one acre. As noted in the Site and Project Description section, a Lot Line Adjustment was recorded for the subject property on December 13, 2019, which enlarged the property to meet the minimum lot size requirement and facilitate the proposed subdivision.

The commenter also noted that the Diamond Bar Country Estates Association (DBCEA) is the governing board for the property and that the property owner should obtain approval from the DBCEA. While true that the property owner is subject to CC&Rs of the DBCEA, it is the owner’s separate obligation to follow the DBCEA’s rules. The proposed subdivision fully conforms to the City’s Subdivision Ordinance and zoning regulations applicable to the site, and the City must base its decision solely on whether the required findings for approval of the tentative map can be made.

The comments received for the City Council hearing on September 25, 2026, were the same comments received on August 27, 2026, prior to the Planning Commission hearing.

SITE AND PROJECT DESCRIPTION:

The project site is located in the Diamond Bar Country Estates (The Country), on the north side of Ridge Line Road, west of Derringer Lane, and is currently developed with an existing single-family residence. The property is zoned Rural Residential (RR), and the underlying General Plan land use designation is also named Rural Residential. The property has six protected trees on site but no protected trees are proposed for removal with the subdivision. If trees are proposed for removal during construction of the proposed single-family residence, the City’s Tree Preservation Ordinance requires the applicant to obtain a Tree Permit with appropriate mitigation.

In 2019, a Lot Line Adjustment (LLA) was recorded to adjust the side property line between the subject property and 23819 Ridge Line (property to the west). Prior to the LLA, the subject parcel was 1.81 acres, and the neighboring parcel was 1.5 acres. After the LLA was recorded, the subject parcel increased in size to 2.3 acres, and the neighboring parcel was reduced to 1.02 acres. The LLA was processed to allow the subject property to acquire sufficient land to meet the minimum one-acre lot size requirement for a two-lot subdivision.

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Agenda Item #: 7.1
Meeting Date: October 6, 2026
The property is legally described as Lot 62 of Tract No. 30091, as adjusted, and the Assessor’s Parcel Number (APN) is 8713-004-016.

The image below highlights the subject property:

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Agenda Item #: 7.1
Meeting Date: October 6, 2026
Project Description
The proposed two-lot subdivision would facilitate the development of a single-family residence on the newlycreated parcel. The gross and net size (after the dedication of the private street easement) of each lot is provided in the table below.

Parcel 1 Parcel 2
Lot Size
(Minimum
1 acre)
48,352 SF (1.11 AC) - Gross
44,867 SF (1.03 AC) - Net
51,836 SF (1.19 AC) - Gross
43,996 SF (1.01 AC) – Net
Proposed Tentative Parcel Map
A Development Review application for the single-family home on proposed Parcel 2 will be submitted for

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Agenda Item #: 7.1
Meeting Date: October 6, 2026
processing in the future.

ANALYSIS:

TENTATIVE MAP
A tentative map approves the division of land for the purpose of sale, lease, or financing, and is governed by the Subdivision Map Act. A tentative map prescribes how the land is to be subdivided. The City of Diamond Bar’s Subdivision Ordinance establishes the minimum standards for the design of the lots, and the public improvements required to serve them. A subdivision of four or fewer parcels requires a parcel map, and a subdivision of five or more parcels requires a tract map. When a Planning Commission or City Council considers a tentative parcel or tract map, it must be reviewed pursuant to the required findings mandated by State law for approval or denial of the map.

The proposed subdivision is in conformance with the City’s General Plan and zoning, and all applicable requirements of the Subdivision Map Act. The project complies with the minimum lot area and density. No variances or exceptions are requested, and all public utilities and services are available to service the project.

After evaluating the application, staff finds that the proposed Tentative Parcel Map complies with the City’s Subdivision Ordinance and that the subdivision findings required pursuant to Diamond Bar City Code (DBCC) Section 21.20.080 can be made.

Parkland Dedication/In-Lieu Fees
State law (“Quimby Act”) and Diamond Bar’s Subdivision Ordinance require the dedication of land or payment of fees for park or recreational purposes as a condition of approval for a tentative map. The land or fees are to be used only for the purpose of developing new or rehabilitating existing park or recreational facilities to serve the subdivision, and the amount and location of land to be dedicated, or amount of fees paid, shall bear a reasonable relationship to the use of the park and recreational facilities by the future inhabitants of the subdivision. The amount of the in-lieu fee is based upon the number and type of dwelling unit expected to be developed within the proposed subdivision and the per-acre fair market value of the land as determined by City staff and approved by the City Council. To calculate the amount of the in-lieu fee, the peracre fair market value of the property is multiplied by the amount of required park acreage resulting in a parkland obligation of 0.017 acres. Staff recommends using a fair market value of $2.8 million per acre, consistent with the recent local benchmark for comparable land sales in Diamond Bar.

In-lieu fees are determined by a formula set forth under DBCC Section 21.32.40. The in-lieu fee for a new, undeveloped single-family lot is $47,600, which shall be paid prior to final map approval (see Condition of Approval #9 under Tentative Parcel Map Conditions).

ENVIRONMENTAL REVIEW:

This project has been reviewed for compliance with the California Environmental Quality Act (CEQA). Pursuant to CEQA Guidelines Section 15315, subdivisions into four or fewer parcels on land that does not have an average slope of more than 20 percent are categorically exempt from environmental review. The proposed subdivision does not qualify for this exemption because the subject property has an average slope of 32 percent. Staff therefore prepared an Initial Study and Notice of Intent to Adopt a Mitigated Negative Declaration (IS/MND), and filed these environmental documents with the Los Angeles County Clerk on August 12, 2026 (Attachment 2). The analysis and findings contained in the IS/MND concluded that, with the mitigation measures contained therein, the proposed subdivision would not have a significant impact on the environment.

Pursuant to CEQA Guidelines Section 15105, the public review period for the IS/MND began on August 12, 2026, and ended September 1, 2026. No comments from the public or outside agencies were received during the public-review period.

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Agenda Item #: 7.1
Meeting Date: October 6, 2026
NOTICE OF PUBLIC HEARING:

On September 25, 2026, public hearing notices were mailed to property owners within a 1,000-foot radius of the project site. On September 25, 2026, the notice was published in the San Gabriel Valley Tribune newspaper, the project site was posted with a public hearing notice display board; and a copy of the notice was posted at the City’s designated community posting sites.

LEGAL REVIEW:

The City Attorney has reviewed and approved the Resolution as to form.

PREPARED BY:

Mayuko Nakajima, Senior Planner, Community Development
ATTACHMENTS:

1. Resolution No. 2026-32 and Conditions of Approval

2. Notice of Mitigated Negative Declaration and Initial Study/Environmental Checklist

3. Tentative Parcel Map No. 83773

4. Planning Commission Staff Report dated September 8, 2026 (Attachments not included)

5. Planning Commission Resolution No. 2026-11

6. Minutes from the September 8, 2026 Planning Commission meeting

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RESOLUTION NO. 2026-32

A RESOLUTION OF THE CITY COUNCIL OF THE CITY OF DIAMOND

BAR, CALIFORNIA, APPROVING MITIGATED NEGATIVE
DECLARATION AND TENTATIVE PARCEL MAP NO. 83773 FOR THE
SUBDIVISION OF AN EXISTING 2.3 ACRE LOT INTO TWO LOTS FOR

THE FUTURE DEVELOPMENT OF A NEW SINGLE-FAMILY
RESIDENCE ON THE NEWLY CREATED LOT LOCATED AT 23901
RIDGE LINE ROAD, DIAMOND BAR, CALIFORNIA (APN 8713-004-016).

A. RECITALS

1. The property owner, Arun Jain, and applicant, Pete Volbeda, have filed an application for Tentative Parcel Map No. 83773 Case No. PL2022-119 to subdivide an existing lot into two separate lots for the development of a single-family residence on the newly created lot located at 23901 Ridge Line Road. Hereinafter in this resolution, the subject Tentative Parcel Map shall be collectively referred to as the “Project.”

2. The subject property is made up of one parcel totaling 100,188 gross square feet (2.3 acres). It is located in the Rural Residential (RR) zone with an underlying General Plan land use designation of Rural Residential.

3. The legal description of the subject property is Lot 62 of Tract No. 30091.

The Assessor’s Parcel Number is 8713-004-016.

4. Notification of the public hearing for this project was published in the San Gabriel Valley Tribune newspaper on September 25, 2026. Public hearing notices were mailed to property owners within a 1000-foot radius of the project site. In addition to the published and mailed notices, the project site was posted with a display board and public notices were posted at the City’s designated community posting sites.

5. On September 8, 2026, the Planning Commission of the City of Diamond Bar conducted a duly noticed public hearing, solicited testimony from all interested individuals, and concluded said hearing on that date. At that time, the Planning Commission recommended that the City Council approve the Project, subject to conditions.

6. On October 6, 2026, the City Council of the City of Diamond Bar conducted a duly noticed public hearing, solicited testimony from all interested individuals, and concluded said hearing on that date.

7. In accordance with the California Environmental Quality Act (“CEQA”), on August 12, 2026, the Community Development Department prepared and filed an Initial Study/Environmental Checklist and Notice of Intent to adopt a Mitigated Negative which analyzed the potential impacts of the Project (“NOI”). The NOI was circulated for a 20-day period ending on September 1, 2026 in accordance with CEQA Guidelines section 15105,

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Resolution No. 2026-32
2 8. A final Mitigated Negative Declaration (“MND”) has been prepared, which MND concludes that with the mitigation proposed by the MND that the Project will not have a significant effect on the environment.

9. The documents and materials constituting the administrative record of the proceedings upon which the City’s decision is based are located at the City of Diamond Bar, Community Development Department, Planning Division, 21810 Copley Drive, Diamond Bar, CA 91765, are have been available to the public and City Council for review.

B. RESOLUTION
NOW, THEREFORE, it is found, determined and resolved by the City Council of the City of Diamond Bar as follows:

1. The City Council hereby specifically finds that all of the facts set forth in the Recitals, Part A, of this Resolution are true and correct.

2. The City Council has considered the MND together with comments received during the public review process and finds on the record before it that there is no substantial evidence that the Project will have a significant effect on the environment and that the MND reflects the City's independent judgment and analysis and therefore, by this Resolution adopts the MND and directs City staff to file a notice of determination with the Clerk of Los Angeles County within five days of adoption of this Resolution.

3. The City Council approves the Project, finding it consistent with the City's Subdivision Ordinance and the Subdivision Map Act as further detailed below.

C. FINDINGS OF FACT
Based on the findings and conclusions set forth herein and as prescribed under Diamond Bar City Code (DBCC) Section 21.20, the City Council hereby makes the following findings:

1. The City Council hereby specifically finds and determines that, having considered the record as a whole including the findings set forth below, and changes and alterations which have been incorporated into and conditioned upon the proposed Project set forth in the application, there is no evidence before the City Council that the project proposed herein will have the potential of an adverse effect on wild life resources or the habitat upon which the wildlife depends. Based upon substantial evidence, the City Council hereby rebuts the presumption of adverse effects contained in Section 753.5(d) of Title 14 of the California Code of Regulations; Tentative Map Findings: Pursuant to Subdivision Code Section 21.20.080

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Resolution No. 2026-32
3 of the City’s Subdivision Ordinance, this City Council makes the following findings:
a. The proposed subdivision, together with the provisions for its design and improvement, is consistent with the general plan and any applicable specific plan;
The proposed project involves the subdivision of an existing 100,188 square-foot (2.3 gross acre) lot developed with an existing single-family residence into two lots for the future development of a new single-family residence on the newly created lot. Proposed Parcel 1 is 48,352 square feet (1.11 gross acres) and proposed Parcel 2 is 51,836 square feet (1.19 gross acres). The property is zoned Rural Residential (RR), and the underlying General Plan land use designation is also named Rural Residential. The development of a single-family residence on Parcel 2 will be processed through a Development Review application for
compliance with the City’s General Plan, City Design Guidelines and development standards. The project will provide additional homeownership opportunities of single-family housing that will be compatible with the surrounding development.

The project site is not part of any theme area, specific plan, community plan, boulevard or planned development.
b. The site is physically suitable for the type and proposed density of development;
The proposed subdivision will not interfere with the use and enjoyment of neighboring existing or future developments because the use of each lot is for a single-family home and the surrounding uses are also single-family homes. The maximum allowed density for the Rural Residential general plan land use designation and zoning district is one dwelling unit per gross acre (1 DU/Acre).

Therefore, with a 2.3-acre lot, the proposed project is in compliance with the City’s General Plan with regards to density. Also, the proposed location of the building pads and footprints are in compliance with the development standards.
c. The design of the subdivision or the proposed improvements will not cause substantial environmental damage or injure fish or wildlife or their habitat;
An initial study was prepared and it was determined that the proposed project qualifies for a Mitigated Negative Declaration.

With the proposed mitigation measures, the project will not have a significant effect on the environment. In accordance to the

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Resolution No. 2026-32
4 provisions of Section 15070 of the CEQA guidelines, the City prepared and filed a Notice of Availability and Intent to Adopt a Mitigated Negative Declaration for the project on August 12, 2026, with the Los Angeles County Clerk. Pursuant to CEQA Section 15015, the public review period for the Mitigated Negative Declaration began August 12, 2026, and ended September 1, 2026.
d. The design of the subdivision or type of improvements will not cause serious public health or safety problems;
For the future development of the new single-family residence, grading shall be constructed, operated, and maintained in accordance with the recommendations contained in a preliminary geotechnical investigation to assure that geotechnical stability is maintained or increased. Detailed drainage and hydrology studies shall be completed, including the potential for debris flows, and the proposed conditions of approval will likely prevent any significant increases in erosion and flood hazards.

Before the issuance of any City permits, the proposed project is required to comply with all conditions within the approved resolution, Building and Safety Division, Public Works Department, and Los Angeles County Fire Department requirements. Through the permit and inspection process, the referenced agencies will ensure that the proposed project is not detrimental to the public health, safety or welfare or materially injurious to the properties or improvements in the vicinity.
e. The design of the subdivision or type of improvements will not conflict with easements, acquired by the public at large for access through or use of, property within the proposed subdivision.

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Resolution No. 2026-32
5 compliance with the California Regional Water Quality Control Board.
g. A preliminary soils report or geologic hazard report does not indicate adverse soil or geologic conditions; and
For the future development of the new single-family residence, grading shall be constructed, operated, and maintained in accordance with the recommendations contained in a preliminary geotechnical investigation to ensure that geotechnical stability is maintained or increased.
h. The proposed subdivision is consistent with all applicable provisions of the City’s Subdivision Ordinance, the Development Code, and the Subdivision Map Act.

The proposed subdivision is consistent with the City’s Subdivision Ordinance, Subdivision Map Act, and applicable Development Code. In addition, the development of a new single-family residence on the newly created lot will be processed through a Development Review application for compliance with the City’s development standards.

2. Based on the findings and conclusions set forth herein, the City Council approves Tentative Parcel Map No. 72035, subject to the following conditions and the attached Standard Conditions of Approval:
a. GENERAL

1. The following Conditions of Approval, including the Standard Conditions of Approval attached hereto, shall be binding on and enforceable against, and, whenever used herein, the terms “applicant”, "owner", and/or "applicant/owner" shall mean and refer to, each of the following: the project applicant, Pete Volbeda, the owner(s), Arun Jain, and tenants(s) of the property, and each of their respective successors and assigns.

2. This approval shall not be effective for any purpose until the applicant/owner of the property involved has filed, within twentyone (21) days of approval of this Tentative Parcel Map No. 83773, Case No. PL2022-119, at the City of Diamond Bar Community Development Department, an affidavit stating that the
applicant/owner is aware of and agrees to accept all the conditions of this approval. Further, this approval shall not be effective until the applicant pays the remaining City processing fees.

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Resolution No. 2026-32
6 3. Within five days of this approval, the subdivider/applicant shall pay to the City, the Department of Fish and Wildlife fee pursuant to Section 711.4 of the Fish and Game Code.

4. The subdivision shall comply with the Conditions of Approval attached hereto and referenced herein.

5. The development of a new single-family residence on the new lot shall be submitted for review and approval of a Development Review application and shall comply with the City’s Development Code.

6. Prior to any use of the project site being commenced thereon, all conditions of approval shall be completed.

7. The project site shall be maintained and operated in full compliance with the conditions of approval and all laws, or other applicable regulations.

8. Pursuant to Government Code Section 66020, the Applicant is informed that the 90-day period in which the Applicant may protest the fees, dedications, reservation or other exaction imposed on this approval through the conditions of approval has begun.

9. Standard Conditions. The applicant shall comply with the standard development conditions attached hereto.
b. TENTATIVE PARCEL MAP CONDITIONS

1. Prior to the recordation of the final map, the development shall comply with the specific requirements of Chapter 21.30
(Subdivision Design and Improvement Requirements) and
Chapter 21.34 (Improvement Plans and Agreements) of the Diamond Bar City Code, as applicable. Final map approval will not be granted unless the map is in substantial compliance with Tentative Parcel Map No. 83773 including all conditions, and the applicant has entered into a subdivision improvement agreement to the satisfaction of the City Attorney.

2. The development shall secure compliance with the requirements of the Subdivision Ordinance and the General Plan and shall comply with the Conditions of Approval attached hereto and referenced herein.

3. This approval of Tentative Parcel Map No. 83773, Case No. PL2022-119 expires three years from the date of approval if

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Resolution No. 2026-32
7 the use has not been exercised as defined per Diamond Bar City Code Section (DBCC) 21.20.140. The applicant may request for a time extension if such request submitted to the City in writing is no less than 30 days prior to the approval’s expiration date, subject to DBCC Section 21.20.150 for City Council approval.

4. Prior to the issuance of a grading permit, the development shall comply with the Mitigation Monitoring and Reporting Program for the Mitigated Negative Declaration. All required mitigation monitoring fees shall be deposited with the City 90 days. All costs related to the ongoing monitoring shall be secured from the applicant and received by the City prior to the approval of the final map.

5. Approval of the Tentative Parcel Map is for subdivision of land only. No land use or development entitlements are expressed or implied.

6. The development shall provide parcels, easements or rights-ofway for private streets, water supply and distribution systems, sewage disposal systems, storm drainage facilities, solid waste disposal and public utilities providing electric, gas, and telecommunications services.

7. All utilities shall be installed underground in compliance with DBCC Section 21.30.110.

8. The design of the subdivision shall provide, to the extent feasible, for future passive or natural heating or cooling opportunities in the subdivisions, in compliance with Subdivision Map Act
Section 66473.1.

9. Prior to final parcel map approval, the subdivider shall pay a parkland dedication in lieu fee for park and recreational purposes in the amount of $47,600, which equals the parkland obligation derived from the formula in DBCC Section 21.32.040(C) times the average per-acre fair market value for the appropriate park planning area. For the purposes of determining the required fee, the term “fair market value” shall mean the market value of the land as determined by the City staff, and approved by the Commission or Council, prior to or at tentative map approval.

10. Approval of Tentative Parcel Map No. 83773 shall not be interpreted as repealing, abrogating, or annulling any private easement, covenant, or dual restriction imposed on the subject property.

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Resolution No. 2026-32
8 The City Council shall:
(a) Certify to the adoption of this Resolution; and
(b) Forthwith transmit a certified copy of this Resolution, by certified mail, to:

Arun Jain, 23901 Ridge Line Road, Diamond Bar, CA 91765, and Pete Volbeda, 215 N. 2nd Avenue Suite B, Upland, CA 91786.

PASSED, APPROVED, AND ADOPTED this 6th day of October, 2026.

CITY OF DIAMOND BAR
_________________________
Steve Tye, Mayor
ATTEST:

I, Kristina Santana, City Clerk of the City of Diamond Bar, do hereby certify that the foregoing Resolution was duly introduced, passed, and adopted by the City Council held on the 6th day of October 2026, by the following vote:

AYES: Council Member:

NOES: Council Member:

ABSTAIN: Council Member:

ABSENT: Council Member:
__________________________
Kristina Santana, City Clerk

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Resolution No. 2026-32

COMMUNITY DEVELOPMENT DEPARTMENT

STANDARD CONDITIONS

USE PERMITS, COMMERCIAL AND RESIDENTIAL NEW AND

REMODELED STRUCTURES
PROJECT #: Tentative Parcel Map No. 83773, Case No. PL2022-119 SUBJECT: To subdivide an existing 100,188 square-foot (2.3 gross acre) lot into two separate lots for the development of a single-family residence on the newly created lot
PROPERTY Arun Jain, 23901 Ridge Line Road, Diamond Bar, CA 91765 OWNER:

APPLICANT: Pete Volbeda, 215 N 2nd Avenue, Suite B, Upland, CA 91786 LOCATION: 23901 Ridge Line Road, Diamond Bar, CA 91765
ALL OF THE FOLLOWING CONDITIONS APPLY TO YOUR PROJECT.

APPLICANT SHALL CONTACT THE PLANNING DIVISION AT (909) 839-7030, FOR COMPLIANCE WITH THE FOLLOWING CONDITIONS:

A. GENERAL REQUIREMENTS

1. The applicant shall defend, indemnify, and hold harmless the City, and its officers, agents and employees, from any claim, action, or proceeding to attack, set-aside, void or annul the approval of the Project. In the event the City and/or its officers, agents and employees are made a party of any such action:
(a) Applicant shall provide a defense to the City defendants or at the City's option reimburse the City its costs of defense, including reasonable attorneys fees, incurred in defense of such claims.
(b) Applicant shall promptly pay any final judgment rendered against the City defendants.
(c) The City shall promptly notify the applicant of any claim, action of proceeding, and shall cooperate fully in the defense thereof.

2. Within thirty (30) days of this approval, Applicant shall execute and file with the City an affidavit indicating full understanding and concurrence with the approval

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Resolution No. 2026-32
and all conditions of approval; and pay all remaining outstanding City processing fees, school fees and fees for the review of submitted reports [DBCC Section 22.66.020].

3. Within three days of this project's approval, the subdivider/applicant shall remove the public hearing notice board.

4. The project site shall be maintained and operated in full compliance with the conditions of approval and all laws, or other applicable Federal, State, or City regulations.

5. The applicant shall comply with all applicable requirements of City Planning, Building and Safety Divisions, Public Works Department, and the Los Angeles County Fire Department.

6. City’s approval of the proposed project shall not waive the applicant’s obligation to comply with all applicable sections of the Development Code, all other applicable City Ordinances, and any applicable Specific Plan.

B. FEES/DEPOSITS

1. Prior to final parcel map approval as required by the City, applicant shall pay development fees (including but not limited to Planning, Building and Safety Divisions, and Public Works Department) at the established rates. In addition, the applicant shall pay all remaining prorated City project review and processing fees prior to final parcel map approval.

2. Prior to any plan check, all deposit accounts for the processing of this project shall have no deficits.

APPLICANT SHALL CONTACT THE PUBLIC WORKS/ENGINEERING DEPARTMENT AT (909) 839-7040, FOR COMPLIANCE WITH THE FOLLOWING CONDITIONS:

A. GENERAL

1. A title report/guarantee showing all fee owners, interest holders, and nature of interest shall be submitted for final map plan check. Prior to final map approval, applicant shall submit an updated title report/guarantee and subdivision guarantee ten (10) business days.

2. Any existing easement for open space, utilities, riding and hiking trails shall be relocated and/or grading performed, as necessary, to provide, for the portion within the project site, practical access for the intended use.

3. A permit from the Los Angeles County Public Works Department shall be required for connection to its facilities.

4. Prior to final map approval, applicant shall submit written certifications to the City that all utility services and any other service related to the site shall be available to serve the proposed project. Such letters shall be issued by the

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Resolution No. 2026-32
district, utility and cable television company, within ninety (90) days prior to final map approval.

5. All identified geologic hazards within the tentative parcel map boundaries which cannot be eliminated as approved by the City Engineer shall be indicated on the final map as “Restricted Use Area” subject to geologic hazard. The applicant shall dedicate to the City the right to prohibit the erection of buildings or other structures within such restricted use areas shown on the final map.

6. Easements and the utility companies, for public utility and public services purposes shall be offered and shown on the final map for dedication to the City.

7. After the final map recordation, applicant shall submit to the Public Works/Engineering Department, at no cost to the City, a full size of electronic copy of the recorded map. Final approval of the public or private improvements shall not be given until the copy of the recorded map is received by the Public Works/Engineering Department

8. All activities/improvements for the proposed Tentative Parcel Map shall be wholly contained within the boundaries of the map. Should any off-site activities/improvements be required, approval shall be obtained from the affected property owner and the City as required by the City Engineer.

9. Applicant shall pay the deposits required for plan check, review, and inspection to a separate engineering trust deposit where charges can be drawn by the City or its representatives for services rendered. Charges shall be on an hourly basis and shall include any City administrative costs.

10. Prior to final map approval, applicant shall submit recorded document(s) from the Diamond Bar Country Estates Association indicating the project will have proper/adequate right-of-entry to the subject site.

B. GRADING

1. No grading or any staging or construction shall be performed prior to final map approval by the City Council and map recordation.

C. UTILITIES

1. Easements for public utilities and public services purpose shall be offered and shown on the detailed site plan for affected utility company.

2. Prior to final map approval, Will Serve Letters shall be submitted to the City from all utilities such as, but not limited to, Los Angeles County Sanitation Districts, phone, gas, water, electric, and cable. Such letters shall state that adequate facilities are or will be available to serve the proposed project.

3. Underground utilities shall not be constructed within the drip line of any mature tree except as approved by a registered arborist.

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Resolution No. 2026-32

4. The sanitary sewer system serving the parcels shall be connected to the Los Angeles County maintained sewer system. Said system shall be of the size, grade and depth approved by the City Engineer, the County Sanitation District and Los Angeles County Public Works Department.

END

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O:\Tentative Maps\TPM 83773 23901 Ridge Line PL2022-119\CEQA

NOTICE OF AVAILABILITY AND

INTENT TO ADOPT

MITIGATED NEGATIVE DECLARATION
City of Diamond Bar, 21810 Copley Drive, Diamond Bar, CA 91765 (909) 839-7030 NOTICE: Pursuant to the provisions of the California Environmental Quality Act (CEQA – Public Resources Code, Section 21100 et. Seq.), the City of Diamond Bar has determined that the project referenced hereinafter will not have a significant effect on the environment. A draft Mitigated Negative Declaration has been prepared for review and approval in connection with project approvals and conditions of approval that the City proposes to impose on the project.

PROJECT TITLE: Tentative Parcel Map No. 83773 (Planning No. PL2022-119) PROJECT ADDRESS: 23901 Ridge Line Road, Diamond Bar, CA 91765 PROJECT DESCRIPTION: The applicant is requesting City approval to subdivide an existing 100,188 square-foot (2.3 gross acre) lot constructed with an existing single-family residence into two lots for the future development of a new single-family residence on the newly created lot.

Proposed Parcel 1 is 48,352 square feet (1.11 gross acres) and proposed Parcel 2 is 51,836 square feet (1.19 gross acres). The existing single-family residence will remain on proposed Parcel 1 and a new single-family residence will be proposed on proposed Parcel 2 at a future time. The property is zoned Rural Residential (RR), and the underlying General Plan land use designation is also named Rural Residential.

PROPERTY OWNER: Arun Jain, 23901 Ridge Line Road, Diamond Bar, CA 91765 APPLICANT: Pete Volbeda, 215 N 2nd Avenue Suite B, Upland, CA 91786 A copy of the Initial Study, documenting reasons to support the findings that said project would not have a significant effect which contains mitigation measures, to avoid potentially significant effects, is attached hereto for public review and available at the Planning Division. An Environmental Impact Report is not required for this project.

Environmental Determination: Pursuant to the provisions of the California Environmental Quality Act (CEQA), Section 15070, the City prepared an Initial Study and Mitigated Negative Declaration for this project. Pursuant to CEQA Section 15105, the public review period for the Mitigated Negative Declaration begins August 12, 2026 and ends September 1, 2026.

TIME OF HEARING: 6:30 p.m. (or as soon thereafter that the matter can be heard)
DATE OF PUBLIC HEARING: Tuesday, September 8, 2026
LOCATION: Diamond Bar City Hall – Windmill Community Room 21810 Copley Drive
Diamond Bar, CA 91765
CASE MATERIALS are available for review between the hours of 7:30 a.m. and 5:30 p.m.

Monday through Thursday and 7:30 a.m. to 4:30 p.m. on Friday, at the City of Diamond Bar, Community Development Department/Planning Division, 21810 Copley Dr., Diamond Bar, CA 91765.

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CITY OF DIAMOND BAR

INITIAL STUDY

ENVIRONMENTAL CHECKLIST FORM
CITY OF DIAMOND BAR ~ 21825 COPLEY DRIVE ~ DIAMOND BAR, CA 91765 ~ TEL. (909) 839-7030

1. Project File: Tentative Parcel Map No. 83773 (Planning No. PL2022-119)

2. Lead Agency Name and Address: City of Diamond Bar, 21810 Copley Drive, Diamond Bar, CA 91765

3. Contact Person and Phone Number: Mayuko Nakajima, Senior Planner (909)-839-7033

4. Project location: 23901 Ridge Line Road, Diamond Bar, CA 91765 (APN: 8713-004-016)

5. Project Sponsor's Name and Address: Arun Jain, 23901 Ridge Line Road, Diamond Bar, CA 91765

6. General Plan Designation: Rural Residential (RR)

7. Zoning: Rural Residential (RR)

8. Description of project: (Describe the whole action involved, including but not limited to later phases of the project, and any secondary, support, or off-site features necessary for its implementation. Attach additional sheets if necessary)
The applicant is requesting City approval to subdivide an existing 100,188 squarefoot (2.3 gross acre) lot constructed with an existing single-family residence into two lots for the future development of a new single-family residence on the newly created lot. Proposed Parcel 1 is 48,352 square feet (1.11 gross acres) and proposed Parcel 2 is 51,836 square feet (1.19 gross acres). The existing single-family residence will remain on proposed Parcel 1 and a new single-family residence will be proposed on proposed Parcel 2 at a future time. The property is zoned Rural Residential (RR), and the underlying General Plan land use designation is also named Rural Residential.

The average slope of the subject property is 32 percent. This project would have been categorically exempt from CEQA under Article 19, Section 15315, Class 15 (Minor Land Divisions) of the CEQA Guidelines, except for the fact that the average slope of the property is greater than 20 percent. The proposed subdivision is in conformance with the General Plan and zoning regulations, no variances or exceptions are proposed, and all public services and utilities including water supply are available to serve the project. The project site is located within The Diamond Bar Country Estates (“The Country Estates”), a gated residential community served by fully improved private streets and surrounded by residential development. There are no agricultural activities on or near the proposed project site. The subject property has six protected trees on-site but no protected trees are proposed for removal as part of the subdivision. The proposed project does not involve long-term

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changes to land use or other growth-inducing actions that could impact compliance with or implementation of the Air Quality Management Plan. The proposed project is not expected to generate potentially significant greenhouse gases in that the future construction and occupancy of a single-family residence (which would be enabled by the proposed subdivision) would not exceed greenhouse gas significance thresholds. Upon the completion of the environmental analysis, it was determined that, as conditioned, the proposed project would have less than a significant effect on the environment.

9. Surrounding land uses and setting: (Briefly describe the project's surroundings) North: Single-Family Residence in RR (Rural Residential) zone South: Single-Family Residence in RR (Rural Residential) zone West: Single-Family Residence in RR (Rural Residential) zone East: Single-Family Residence in RR (Rural Residential) zone

10. Other agencies whose approval is required (e.g., permits, financing approval, or participation agreement): None.

11. Have California Native American tribes traditionally and culturally affiliated with the project area requested consultation pursuant to Public Resources Code section 21080.3.1? If so, is there a plan for consultation that includes, for example, the determination of significance of impacts to tribal cultural resources, procedures regarding confidentiality, etc.? Yes, the Gabrieleño Band of Mission Indians – Kizh Nation requested consultation; refer to Tribal Cultural Resources section.

NOTE: Conducting consultation early in the CEQA process allows tribal governments, lead agencies, and project proponents to discuss the level of environmental review, identify and address potential adverse impacts to tribal cultural resources, and reduce the potential for delay and conflict in the environmental review process. (See Public Resources Code section 21080.3.2.) Information may also be available from the California Native American Heritage Commission’s Sacred Lands File per Public Resources Code section 5097.96 and the California Historical Resources Information System administered by the California Office of Historic Preservation. Please also note that Public Resources Code section 21082.3(c) contains provisions specific to confidentiality.

ENVIRONMENTAL FACTORS POTENTIALLY AFFECTED
The environmental factors checked below would be potentially affected by this project, involving at least one impact that is a "Potentially Significant Impact," "Potentially Significant Impact Unless Mitigation Incorporated," or "Less Than-Significant-Impact" as indicated by the checklist on the following pages.
( ) Aesthetics
( ) Biological Resources
( ) Greenhouse Gas Emissions
( ) Land Use / Planning
( ) Population / Housing
( ) Transportation
( ) Wildfire
( ) Agriculture & Forestry Resources
(X) Cultural Resources
(X) Tribal Cultural Resources
( ) Hazards & Hazardous Materials
( ) Mineral Resources
( ) Public Services
( ) Utilities & Service Systems
( ) Energy
( ) Air Quality
(X) Geology & Soils
( ) Hydrology & Water Quality
( ) Noise
( ) Recreation
( ) Mandatory Findings of
Significance

DETERMINATION

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On the basis of this initial evaluation:
( ) I find that the proposed project COULD NOT have a significant effect on the environment.

A NEGATIVE DECLARATION will be prepared.
(X) I find that although the proposed project could have a significant effect on the environment, there will not be a significant effect in this case because revisions in the project have been made by, or agreed to, by the project proponent. A MITIGATED NEGATIVE DECLARATION will be prepared.
( ) I find that the proposed project MAY have a significant effect on the environment, and an ENVIRONMENTAL IMPACT REPORT is required.
( ) I find that the proposed project MAY have a "Potentially Significant Impact" or "Potentially Significant Unless Mitigated" impact on the environment, but at least one effect 1) has been adequately analyzed in an earlier document pursuant to applicable legal standard and 2) has been addressed by mitigation measures based on the earlier analysis as described on attached sheets. An ENVIRONMENTAL IMPACT REPORT is required, but it must analyze only the effects that remain to be addressed.
( ) I find that although the proposed project could have a significant effect on the environment, because all potentially significant effects 1) have been analyzed adequately in an earlier EIR or NEGATIVE DECLARATION pursuant to applicable standards, and 2) have been avoided or mitigated pursuant to that earlier EIR or NEGATIVE DECLARATION, including revisions or mitigation measures that are imposed upon the proposed project, nothing further is required.

Prepared By: Mayuko Nakajima Date: 7/28/2026
Reviewed By: Greg Gubman Date: 7/31/2026

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EVALUATION OF ENVIRONMENTAL IMPACTS
Issues and Supporting Information Sources:

Potentially
Significant
Impact
Less Than
Significant
With
Mitigation
Incorporated
Less Than
Significant
Impact
No Impact

1. AESTHETICS. Would the project:
a) Have a substantial adverse effect on a scenic
vista?
( ) ( ) () ( )
b) Substantially damage scenic resources, including,
but not limited to, trees, rock outcroppings, and
historic buildings within a State Scenic Highway?
( ) ( ) ( ) ()
c) In nonurbanized areas, substantially degrade the
existing visual character or quality of public views
of the site and its surroundings? (Public views are
those that are experienced from publicly
accessible vantage point). If the project is in an
urbanized area, would the project conflict with
applicable zoning and other regulations governing
scenic quality?
( ) ( ) () ( )
d) Create a new source of substantial light or glare,
which would adversely affect day or nighttime
views in the area?
( ) ( ) () ( )
1a) Impact Discussion: The project site is located within an existing gated residential community, surrounded by residential development. The proposed project will have a less than significant impact on the scenic vistas that exist in The Country Estates such as city lights, foothills, and canyons. The proposed parcels are located along Ridge Line Road next to existing parcels with developed with single-family residences and will not impact the vistas of existing homes. 1b) Impact Discussion: No officially designated State scenic routes or highways occur near the project site.
1c) Impact Discussion: The project site is located within an existing gated residential community, surrounded by residential development and therefore will be compatible with the surrounding uses. The project proposes to subdivide an existing lot into two lots for the development of a single-family residence on the newly created lot, and an existing single-family residence will be preserved on the remaining lot. The development of single-family homes will be subject to the City’s Development Code standards and design guidelines, as well as the architectural standards established by the Homeowners Association. As such, the proposed project will not degrade the existing visual character or quality of the site and its surrounding. 1d) Impact Discussion: Light emitted from the future development of a new single-family residence will be consistent with the existing residential uses that surround the project site. As part of the development of the single-family residences, lighting will be included around the building and interior of the building. To reduce the impact on adjacent properties, any new exterior lighting will be directed away or shielded so that it is confined within the boundaries of the property pursuant to Development Code standards. Compliance with the Development Code will result in nonsignificant light and glare impacts.

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Issues and Supporting Information Sources:

Potentially
Significant
Impact
Less Than
Significant
With
Mitigation
Incorporated
Less Than
Significant
Impact
No Impact

2. AGRICULTURE AND FORESTRY RESOURCES.

Would the project:
a) Convert Prime Farmland, Unique Farmland, or
Farmland of Statewide Importance (Farmland), as
shown on the maps prepared pursuant to the
Farmland Mapping and Monitoring Program of the
California Resources Agency, to non-agricultural
use?
( ) ( ) ( ) ()
b) Conflict with existing zoning for agricultural use, or a Williamson Act contract?
( ) ( ) ( ) ()
c) Conflict with existing zoning for, or cause rezoning of, forest land (as defined in Public Resources Code section 12220 (g), timberland (as
defined by Public Resources Code section 4526),
or timberland zoned Timberland Production (as
defined by Government Code Section 51104 (g))?
( ) ( ) ( ) ()
d) Result in the loss of forest land or conversion of
forest land to non-forest use?
( ) ( ) ( ) ()
e) Involve other changes in the existing environment,
which, due to their location or nature, could result
in conversion of Farmland, to non-agricultural use
or conversion of forest land to non-forest use?
( ) ( ) ( ) ()
2a) Impact Discussion: The project site is not designated as Prime Farmland, Unique Farmland or Farmland of Statewide Importance. There are no agricultural activities on or near the proposed project site. Project implementation would not result in the conversion of farmland to nonagricultural use. Therefore, the proposed project would have no impacts to farmlands. 2b) Impact Discussion: Implementation of the proposed project would not conflict with existing zoning for agricultural use, or a Williamson Act contract. Therefore, no impacts would result from the future construction or operation of the proposed project. 2c) Impact Discussion: There are no forestland, timberland or timberland zoned Timberland Production uses that are occurring on-site or in the immediate vicinity. Thus, the proposed project does not involve changes in the existing environment that could conflict with existing zoning or cause of rezoning of forestland, timberland, or timberland zoned Timberland Production. 2d) Impact Discussion: The subject property is not located within forest land, and will thus have no impact in this category.
2e) Impact Discussion: There are no farmland uses that are occurring on-site or in the immediate vicinity. Thus, the proposed project does not involve changes in the existing environment that could result in conversion of Farmland to non-agricultural uses.

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Issues and Supporting Information Sources:

Potentially
Significant
Impact
Less Than
Significant
With
Mitigation
Incorporated
Less Than
Significant
Impact
No Impact

3. AIR QUALITY. Would the project:
a) Conflict with or obstruct implementation of the
applicable air quality plan?
( ) ( ) () ( )
b) Result in a cumulatively considerable net increase
of any criteria pollutant for which the project region
is non-attainment under an applicable Federal or
State ambient air quality standard?
( ) ( ) () ( )
c) Expose sensitive receptors to substantial pollutant
concentrations?
( ) ( ) () ( )
d) Result in other emissions (such as those leading
to odors) adversely affecting a substantial number
of people?
( ) ( ) () ( )
3a) Impact Discussion: The proposed project does not involve long-term changes to land use or other growth-inducing actions that could impact compliance with or implementation of the Air Quality Management Plan. The future construction of a single-family residence will not exceed thresholds for maximum daily construction emissions for pollutants and no mitigation is required.

After the completion of the construction activities, it is not anticipated that there will be an increase in emissions from operational activities of a new single-family residence. Also, a two-lot subdivision falls well below the South Coast Air Quality Management District Air Quality Handbook Threshold for criteria pollutants. Therefore, impacts from operational activities would be less than significant.
3b) Impact Discussion: See response 3a above.
3c) Impact Discussion: See response 3a above.
3d) Impact Discussion: The proposed project will result in the future development of a new singlefamily residence. The proposed project is not expected to generate objectionable odors affecting a substantial number of people. Construction activity associated with the future development of a new single-family residence may generate detectable odors from heavy-duty equipment exhaust.

However, this impact would be short-term in nature (only during construction activities) and cease upon project completion.

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Issues and Supporting Information Sources:

Potentially
Significant
Impact
Less Than
Significant
With
Mitigation
Incorporated
Less Than
Significant
Impact
No Impact

4. BIOLOGICAL RESOURCES. Would the project:
a) Have a substantial adverse effect, either directly
or through habitat modifications, on any species
identified as a candidate, sensitive, or special
status species in local or regional plans, policies,
or regulations, or by the California Department of
Fish and Game or U.S. Fish and Wildlife Service?
( ) ( ) () ()
b) Have a substantial adverse effect on riparian
habitat or other sensitive natural community
identified in local or regional plans, policies, or
regulations or by the California Department of Fish
and Game or US Fish and Wildlife Service?
( ) ( ) ( ) ()
c) Have a substantial adverse effect on State or
federally protected wetlands (including, but not
limited to, marsh, vernal pool, coastal, etc.)
through direct removal, filling, hydrological
interruption, or other means?
( ) ( ) ( ) ()
d) Interfere substantially with the movement of any
native resident or migratory fish or wildlife species
or with established native resident or migratory
wildlife corridors, or impede the use of native
wildlife nursery sites?
( ) ( ) ( ) ()
e) Conflict with any local policies or ordinances
protecting biological resources, such as a tree
preservation policy or ordinance?
( ) ( ) () ( )
f) Conflict with the provisions of an adopted Habitat
Conservation Plan, Natural Community
conservation Plan, or other approved local,
regional, or State habitat conservation plan?
( ) ( ) ( ) ()
4a) Impact Discussion: The project site is in an urbanized area, located within an existing gated residential community, surrounded by residential development. The property has six protected trees on-site but no protected trees are proposed for removal with the proposed subdivision. The subject property is already disturbed and past development activity on the subject property and along the Country’s roadway network has eradicated habitat in areas immediately adjacent to the roads. According to the Resource Conservation Element of the City’s General Plan, the project site is not identified as having species identified as a candidate, sensitive, or special status.

Therefore, the proposed project would not result in significant adverse impact to Federal or State listed or other designated species.
4b) Impact Discussion: As previously stated, the project site is located within an existing gated residential community. No riparian habitat or sensitive natural communities exist on-site.

According to the Resource Conservation Element of the City’s General Plan, the project site is not identified as having sensitive environmental resources.

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4c) Impact Discussion: No federally protected wetlands occur on-site. Therefore, implementation of the proposed project would not result in any impacts in this regard. 4d) Impact Discussion: There may be native resident or migratory wildlife species in the canyons within The Country Estates, and nesting opportunities or raptor/wildlife foraging opportunities on the project site have been largely eradicated. According to the Resource Conservation Element of the City’s General Plan, the project site is not identified as an area to serve as a wildlife movement corridor. Therefore, implementation of the proposed project would not result in any impacts in this regard.
4e) Impact Discussion: The property has six protected trees on-site but no protected trees are proposed for removal with the proposed subdivision. If trees are proposed for removal during construction of the proposed single-family residence, the City’s Tree Preservation Ordinance requires the applicant to obtain a Tree Permit with appropriate mitigation. In light of these factors, the proposed project does not conflict with any local policies or ordinances protecting biological resources.
4f) Impact Discussion: There are no adopted Habitat Conservation Plan, Natural Community Conservation Plans or other approved local, regional, or state habitat conservation plans applicable to the project area. Therefore, the proposed project would not result in impacts in this regard.

Issues and Supporting Information Sources:

Potentially
Significant
Impact
Less Than
Significant
With
Mitigation
Incorporated
Less Than
Significant
Impact
No Impact

5. CULTURAL RESOURCES. Would the project:
a) Cause a substantial adverse change in the
significance of a historical resource as defined in
§ 15064.5?
( ) ( ) ( ) ()
b) Cause a substantial adverse change in the
significance of an archaeological resource
pursuant to § 15064.5?
( ) () ( ) ( )
c) Disturb any human remains, including those
interred outside of dedicated cemeteries?
( ) () ( ) ( )
5a) Impact Discussion: The proposed project may have a significant adverse impact if it would cause a substantial adverse change in the significance of a historical resource as defined in Section 15064.5 of the CEQA Guidelines. This section of the CEQA Guidelines defines a historical resource as one listed in or eligible for listing in the California Register of Historical Places (per state law), included in a local register of historical resources (as defined by state law) or identified as significant in an historical resource survey (meeting the requirements of state law) or determined by the lead agency (City of Diamond Bar) to be historically significant or significant in the architectural, engineering, scientific, economic, agricultural, educational, social, political, military, or cultural annals of California, provided the determination is supported by substantial evidence in light of the whole record. Generally, a resource shall be considered by the lead agency to be “historically significant” if the resource meets the criteria for listing on the California Register of Historical Places. In this case, the existing site is not listed in nor eligible for listing in the California Register of Historical Places, not listed in a local register of historical resources or identified as significant in a historical resource survey, nor has it been determined to be historically significant by the City because it does not meet the criteria for listing on the California Register of

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Historical Places. Therefore, it does not meet the definition of a historical resource contained in Section 15064.5 of the CEQA Guidelines and would not result in any impacts in this regard. 5b) Impact Discussion: CEQA Guidelines Section 15064.5 and Public Resources Code Section 21083.2 provide that a project may have a significant effect on the environment if it causes a substantial adverse change in the significance of a historical resource or a unique archaeological resource and outline requirements for the treatment of archaeological resources if they are discovered during project implementation. It is not anticipated that any archaeological resources exist within the project site. However, in the event of accidental discovery of archaeological resources during ground-disturbing activities, the project would be required to comply with General Plan Resource Conservation Cultural and Historic Resources Policies, including Policy RC-P-42, Archaeological Resources, which provides procedures for the management of archaeological materials on-site during development projects. Policy RC-P-43 seeks to preserve discovered archaeological resources in place to maintain the relationship between the artifacts and their archaeological context, where feasible. Policy RC-P-44 provides that preservation can be achieved through measures such as avoidance and other protections.

Should ground disturbing activities during construction encounter archaeological resources, incorporation of Mitigation Measure CUL-1 would establish procedures for halting construction, retaining a qualified archaeologist to evaluate any unanticipated discovery, and implementing appropriate treatment (such as avoidance, data recovery, or other measures) if a find is determined to be significant under CEQA. Through compliance with the General Plan Resource Conservation policies and the implementation of Mitigation Measure CUL-1, the project would not cause a substantial adverse change in the significance of an archaeological resource pursuant to CEQA Guidelines Section 15064.5. Therefore, impacts would be less than significant with mitigation incorporated.

Mitigation Measure:

CUL-1: Should archaeological resources (sites, features, or artifacts) be exposed during construction activities, all construction work shall immediately stop until a qualified archaeologist, meeting the Secretary of the Interior’s Professional Qualification Standards, can evaluate the significance of the find and determine whether or not additional study is warranted. Depending upon the significance of the find, the archaeologist may simply record the find and allow work to continue. If the discovery proves significant under CEQA, additional work such as preparation of an archaeological treatment plan, testing, or data recovery may be warranted. 5c) Impact Discussion: It is not anticipated that human remains exist within the project site.

However, in the event of accidental discovery of unanticipated human remains during grounddisturbing activities during construction, incorporation of Mitigation Measure CUL-2, provides procedures related to the treatment of the unanticipated discovery of human remains, would ensure that the project’s potential impacts to buried remains would be reduced to less than significant levels.

Mitigation Measure:

CUL-2: In accordance with Section 7050.5 of the California Health and Safety Code, if human remains are found, the applicant or its construction contractor (through the on-site construction manager/contractor superintendent) shall notify the County Coroner within 24 hours of the discovery. No further excavation or disturbance of the site or any nearby area reasonably suspected to overlie adjacent remains shall occur until the County Coroner has determined, within

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two working days of notification of the discovery, the appropriate treatment and disposition of the human remains. If the remains are determined to be Native American, the Coroner shall notify the NAHC in Sacramento within 24 hours. In accordance with California PRC, Section 5097.98, the NAHC must immediately notify those persons it believes to be the Most Likely Descendant (MLD) from the deceased Native American. The MLD shall complete their inspection within 48 hours of being granted access to the site. The MLD would then determine, in consultation with the property owner, the disposition of the human remains.

Issues and Supporting Information Sources:

Potentially
Significant
Impact
Less Than
Significant
With
Mitigation
Incorporated
Less Than
Significant
Impact
No Impact

6. ENERGY. Would the project:
a) Result in potentially significant environmental
impact due to wasteful, inefficient, or unnecessary
consumption of energy resources, during project
construction or operation?
( ) ( ) () ( )
b) Conflict with or obstruct a state or local plan for
renewable energy or energy efficiency?
( ) ( ) () ( )
6a) Impact Discussion: Energy consumption associated with the supply and conveyance of water used for dust control as well as electricity used for powering lighting, electronic equipment, and other construction activities is assumed to be negligible for the future construction of one singlefamily residence. 6b) Impact Discussion: See response 6a above.

Issues and Supporting Information Sources:

Potentially
Significant
Impact
Less Than
Significant
With
Mitigation
Incorporated
Less Than
Significant
Impact
No Impact

7. GEOLOGY AND SOILS. Would the project:
a) Directly or indirectly cause potential substantial
adverse effects, including the risk of loss, injury, or death involving:
i) Rupture of a known earthquake fault, as
delineated on the most recent Alquist-Priolo
Earthquake Fault Zoning Map issued by the
State Geologist for the area or based on
other substantial evidence of a known fault?
Refer to Division of Mines and Geology
Special Publication 42.
( ) ( ) () ( )
ii) Strong seismic ground shaking? ( ) ( ) () ( )
iii) Seismic-related ground failure, including
liquefaction?
( ) ( ) ( ) ()
iv) Landslides? ( ) ( ) () ( )
b) Result in substantial soil erosion or the loss of
topsoil?
( ) ( ) () ( )

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c) Be located on a geologic unit or soil that is
unstable, or that would become unstable as a
result of the project, and potentially result in on- or off-site landslide, lateral spreading, subsidence,
liquefaction or collapse?
( ) ( ) () ( )
d) Be located on expansive soil, as defined in Table
18-1-B of the Uniform Building Code (1994),
creating substantial direct or indirect risks to life or property?
( ) ( ) () ( )
e) Have soils incapable of adequately supporting the
use of septic tanks or alternative waste water
disposal systems where sewers are not available
for the disposal of wastewater?
( ) ( ) ( ) ()
f) Directly or indirectly destroy a unique
paleontological resource or site or unique geologic
feature?
( ) () ( ) ( )
7a-i) Impact Discussion: No active faults are known to traverse the project site and the project site is not located within, or immediate adjacent to an Alquist-Priolo Earthquake Fault Zone.

Therefore, rupture of a known earthquake fault would not occur within the project area.

Adherence to standard engineering practices and design criteria relative to seismic and geologic hazards in accordance with the California Building Code (CBC) is required for any physical development.
7a-ii) Impact Discussion: Southern California has numerous active and potentially active faults that could produce strong ground shaking that could impact the project site. The City of Diamond Bar is in proximity to the San Andreas and Sierra Madre Fault zone. The California Building Code requires structural design and construction methods that minimize the effects of strong seismic ground shaking. The California Building Code requirements would be applied to the future construction of a single-family residence as standard conditions of project approval. 7a-iii) Impact Discussion: The project area is located within a portion of the City that is not subject to liquefaction. Therefore, project implementation is not anticipated to result in the exposure of people or structures to potential impacts related to seismic ground failure or liquefaction. 7a-iv) Impact Discussion: As required by the California Building Code, at the time of development for the construction of a single-family residence, the applicant is required to submit a detailed geotechnical investigation report that includes field exploration, laboratory testing and analyses.

This report shall determine if the project site is suitable for the development of a new single-family residence. Therefore, impacts would be less than significant. 7b) Impact Discussion: The largest source of erosion, particularly in an urban environment is uncontrolled drainage during construction. Erosion potential during construction would be managed to the maximum extent practicable with Best Management Practices (BMPs). The future construction of a single-family residence would be required to be covered under the National Pollutant Discharge Elimination System (NPDES) General Construction Permit; therefore, construction BMPs would be implemented on the project site during future demolition and construction activities to minimize erosion impacts. Implementation of the construction-related BMPs would reduce potential construction-related impacts to the maximum extent feasible. The

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operation of the project site would not cause the loss of topsoil or erosion because the site would be landscaped and paved.
7c) Impact Discussion: See response 7a(iv) above.
7d) Impact Discussion: See response 7a(iv) above.
7e) Impact Discussion: The project would be served by the sewer system, thus there is no impact on soils inadequately capable of supporting the use of septic tanks or alternative waste water disposal systems.
7f) Impact Discussion: The project site is located within an existing gated residential community.

It is not located in an area likely to have unique paleontological resource or site or unique geologic features. However, the General Plan Resource Conservation Element’s Cultural and Historic Resources policies include Policy RC-P-47, Paleontological Resources. Mitigation Measure GEO-1 implements Policy RC-P-47 by requiring work to halt, evaluation by a Qualified Paleontologist, and appropriate treatment and curation if unanticipated fossil materials are discovered during construction. Through compliance with General Plan Resource Conservation Element Policy RC-P-47 and implementation of GEO-1, the project would not directly or indirectly destroy a unique paleontological resource or unique geologic feature, and impacts would be less than significant with mitigation incorporated.

Mitigation Measure:

GEO-1: Should unanticipated fossil materials be discovered by the construction crew during the course of future development, construction activity should be halted in a 50-foot radius around the discovery. The project applicant or its construction contractor, through the on-site construction manager or contractor superintendent, shall notify a Qualified Paleontologist, who shall be retained to evaluate the discovery, determine its significance, and identify any additional mitigation or treatment that may be required. Work in the area can resume once the find is properly documented and authorization is given to continue with construction. Any scientifically significant paleontological resources found, including the initial unanticipated find (if it proves to be significant), should be prepared, identified, analyzed, and permanently curated in an approved repository (typically the Natural History Museum of Los Angeles). The cost of curation would be determined by the repository, and the costs of preparation and curation would be the responsibility of the project applicant.

Issues and Supporting Information Sources:

Potentially
Significant
Impact
Less Than
Significant
With
Mitigation
Incorporated
Less Than
Significant
Impact
No Impact

8. GREENHOUSE GAS EMISSIONS. Would the project:
a) Generate greenhouse gas emissions, either
directly or indirectly, that may have a significant
impact on the environment?
( ) ( ) () ( )
b) Conflict with an applicable plan, policy or
regulation adopted for the purpose of reducing the
emissions of greenhouse gases? ( ) ( ) () ( )
8a) Impact Discussion: The scientific consensus is that greenhouse gases (GHGs) generated by human activities contribute to climate change by increasing the Earth’s natural greenhouse effect.

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The gases concentrate in the Earth's atmosphere and trap heat by blocking some of the longwave energy the Earth normally radiates back into space. Human activities that produce GHGs are the burning of fossil fuels (coal, oil and natural gas for heating and electricity, gasoline and diesel for transportation); methane from landfill wastes and raising livestock, deforestation activities; and some agricultural practices. These activities are increasing the greenhouse gases in the Earth's atmosphere and could be accelerating global climate change. Long-term environmental consequences in California could potentially include a reduction in water supply from the Sierra Nevada snow pack, which could result in a reduction in imported water, and public health problems due to degraded air quality and more intense summer heat.

In 2005, in recognition of California’s vulnerability to the effects of climate change, then Governor Schwarzenegger established Executive Order S-3-05 which set forth the following target dates by which Statewide emission of GHGs would be progressively reduced: (1) by 2010, reduce GHG emissions to 2000 levels; (2) by 2020, reduce greenhouse gas emissions to 1990 levels; and (3) by 2050, reduce GHG emissions to 80 percent below 1990 levels. In 2006, California passed the California Global Warming Solutions Act of 2006 (Assembly Bill 32 [AB32]; Division 25.5, Sections 38500 et seq., H&SC) requiring the California Air Resources Board (CARB) to design and implement emission limits, regulations, and other measures, such that feasible and cost-effective Statewide GHG emissions are reduced to 1990 levels by 2020 (representing an approximate 25 percent reduction in emissions). In June 2007, CARB directed staff to pursue 37 early actions for reducing GHG emissions under AB 32. The broad spectrum of strategies to be developed (e.g., low-carbon fuel standard, regulations for refrigerants with high-global warming potentials, guidance and protocols for local governments to facilitate GHG reductions, and green ports) reflects that the serious threat of climate change requires action as soon as possible.

In accordance with AB 32, CARB developed the first Scoping Plan in 2008 to outline the State’s strategy to achieve 1990 level emissions by year 2020. In May 2014, the CARB released and adopted the First Update to the Climate Change Scoping Plan to identify the next steps in reaching AB 32 goals and evaluate the progress that has been made between 2000 and 2012. A newer version of the Scoping Plan was then adopted by the CARB in December 2017 (entitled California’s 2017 Climate Change Scoping Plan). Lastly, the most recent version of the Scoping Plan was adopted by the CARB in November 2022 (entitled Final 2022 Scoping Plan for Achieving Carbon Neutrality) (2022 Scoping Plan), which was designed to be consistent with the long-term GHG reduction targets embedded in AB 1279. Since adoption of the 2008 Scoping Plan and the subsequent updates in 2014, 2017, and 2022, State agencies have adopted programs identified in the plan, and the Legislature has passed additional legislation to achieve the GHG reduction targets. Statewide strategies to reduce GHG emissions include the Low Carbon Fuel Standard, California Appliance Energy Efficiency regulations, California Building Standards (e.g., CALGreen and the 2022 Building and Energy Efficiency Standards), zero carbon electricity by 2045, and changes in the corporate average fuel economy standards (e.g., Pavley I and California Advanced Clean Cars).

Global climate change is not confined to a particular project area and is generally accepted as the consequence of global industrialization over the last 200 years. A typical project, even a very large one, does not generate enough greenhouse gas (GHG) emissions on its own to influence global climate change significantly; hence the issue of global climate change is, by definition, a cumulative environmental impact. The State of California, through its governor and legislature, has established a comprehensive framework for the substantial reduction of GHG emissions over the next 40-plus years. This will occur primarily through the implementation of AB 32 and Senate Bill 375 (SB 375), which will address GHG emissions on a statewide, cumulative basis.

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The City of Diamond Bar Climate Action Plan adopted in 2019 reinforces the City’s commitments to reduce GHG emissions. The City’s Climate Action Plan introduces emissions targets for 2030 of 6.0 MTCO2e per capita and for 2040 of 4.0 MTCO2e per capita. Nevertheless, the currently proposed project is not expected to generate potentially significant greenhouse gases by subdividing an existing lot for the future construction of a new single-family residence. Therefore, no new significant impacts are anticipated and no mitigation measures are necessary at this time. 8b) Impact Discussion: See response 8a above.

Issues and Supporting Information Sources:

Potentially
Significant
Impact
Less Than
Significant
With
Mitigation
Incorporated
Less Than
Significant
Impact
No Impact

9. HAZARDS AND HAZARDOUS MATERIALS. Would the
project:
a) Create a significant hazard to the public or the
environment through the routine transport, use, or
disposal of hazardous materials?
( ) ( ) () ( )
b) Create a significant hazard to the public or the
environment through reasonably foreseeable
upset and accident conditions involving the
release of hazardous materials into the
environment?
( ) ( ) () ( )
c) Emit hazardous emissions or handle hazardous or
acutely hazardous materials, substances, or
waste within 1/4 mile of an existing or proposed
school?
( ) ( ) ( ) ()
d) Be located on a site which is included on a list of
hazardous materials sites compiled pursuant to
Government Code Section 65962.5 and, as a
result, would it create a significant hazard to the
public or the environment?
( ) ( ) ( ) ()
e) For a project located within an airport land use
plan or, where such a plan has not been adopted,
within two miles of a public airport or public use
airport, would the project result in a safety hazard
or excessive noise for people residing or working
in the project area?
( ) ( ) ( ) ()
f) Impair implementation of or physically interfere
with an adopted emergency response plan or
emergency evacuation plan?
( ) ( ) ( ) ()
g) Expose people or structures, either directly or
indirectly, to a significant risk of loss, injury or
death involving wildland fires?
( ) ( ) () ( )
9a) Impact Discussion: The proposed project would not create a significant hazard to the public or the environment from the routine transport, use, or disposal of hazardous materials. Small amounts of hazardous materials may be found in solvents and chemicals used for cleaning,

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building maintenance, and landscaping. The materials would be similar to those found in common household projects or pesticides. Hazardous materials used in construction and operation of the proposed project would be subject to City, State, and Federal regulations, reducing impacts to a less than significant level.
9b) Impact Discussion: The proposed uses are not anticipated to result in the creation of health hazards following compliance with health and safety regulations. The proposed uses would not use, generate or dispose of hazardous materials in large quantities. As stated above, hazardous materials used in construction and operation of the proposed project would be subject to City, State, and Federal regulations, reducing impacts to a less than significant level. 9c) Impact Discussion: The proposed project would not involve the transport, use, handling, or disposal of notable quantities of hazardous materials, aside from normal household chemicals and landscaping applications. Therefore, the proposed project would not pose a health risk to nearby schools, and no significant impacts to schools would result from the future construction and operation of the development of a new single-family residence. 9d) Impact Discussion: The project site is located within an existing gated residential community, surrounded by residential development. The existing uses do not use, handle, or store hazardous materials. Future development of a new single-family residence would not create a significant hazard to the public or to the environment. Therefore, no impacts would occur in this regard. 9e) Impact Discussion: The project site is not located within an airport land use plan or within two miles of an airport. The nearest airport is Brackett Field Airport, which is approximately 7.2 miles northeast of the project site. No impacts would occur in this regard. 9f) Impact Discussion: Emergency vehicles would continue to have access to project related and surrounding roadways upon completion of a new single-family residence. The future development of a new single-family residence would not impact access to emergency response. In addition, the future development of a new single-family residence would not place temporary or permanent barriers on existing roadways or reconfigure existing roadways. Therefore, no impacts would result from the construction and operation of a future development of a new single-family residence.
9g) Impact Discussion: Most homes in The Country Estates are within the Very High Fire Hazard Severity zones. The project site is not at a greater risk than other homes within The Country, and is at less risk than homes abutting wildlands. In addition, at the time of development, a fuel modification plan is required and subject to the review and approval of the County of Los Angeles, Fire Department’s Prevention Bureau - Forestry Division.

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Issues and Supporting Information Sources:

Potentially
Significant
Impact
Less Than
Significant
With
Mitigation
Incorporated
Less Than
Significant
Impact
No Impact

10. HYDROLOGY AND WATER QUALITY. Would the
project:
a) Violate any water quality standards or waste
discharge requirements or otherwise substantially
degrade surface or ground water quality?
( ) ( ) () ( )
b) Substantially decrease groundwater supplies or
interfere substantially with groundwater recharge
such that the project may impede sustainable
groundwater management of the basin?
( ) ( ) () ( )
c) Substantially alter the existing drainage pattern of the site or area, including through the alteration of
the course of a stream or river or through the
addition of impervious surfaces, in a manner which
would:
i) result in substantial erosion or siltation on- or
off-site?
( ) ( ) () ( )
ii) substantially increase the rate or amount of
surface runoff in a manner which would result
in flooding on- or offsite;
( ) ( ) () ( )
iii) create or contribute runoff water which would
exceed the capacity of existing or planned
stormwater drainage systems or provide
substantial additional sources of polluted
runoff; or
( ) ( ) () ( )
iv) Impede or redirect flood flows? ( ) ( ) () ( )
d) In flood hazard, tsunami, or seiche zones, risk
release of pollutants due to project inundation?
( ) ( ) ( ) ()
e) Conflict with or obstruct implementation of a water
quality control plan or sustainable groundwater
management plan?
( ) ( ) () ( )
10a) Impact Discussion: The proposed project will not be allowed to violate any water quality standards or waste discharge requirements. The State Water Resource Control Board (SWRCB) has adopted a National Pollutant Discharge Elimination System (NPDES) General Permit for storm water discharges associated with future construction activity. Compliance with Statewide NPDES General Permit for Storm Water Discharges associated with future construction activity which would prevent storm water pollution from impacting waters of the U.S. in the vicinity of the project area, will be required.
10b) Impact Discussion: See response 10a above.
10c-i) Impact Discussion: There are no streams or rivers nearby. The Public Works/Engineering Department has reviewed the preliminary hydrology report conducted by Civil Trans Inc., dated June 5, 2026, which includes supporting hydraulic and hydrological data. The proposed project

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will not substantially alter the existing drainage pattern of the site or area in a manner which would result in substantial erosion or siltation on- or off-site. Therefore, impacts would be less than significant.
10c-ii) Impact Discussion: The Public Works/Engineering Department has reviewed the preliminary hydrology report conducted by Civil Trans Inc., dated June 5, 2026, which includes supporting hydraulic and hydrological data. The proposed project will not substantially alter the existing drainage pattern of the site or area or substantially increase the rate of amount of surface runoff in a manner which would result in flooding on- or off-site. Therefore, impacts would be less than significant.
10c-iii) Impact Discussion: See response 10c(ii) above. 10c-iv) Impact Discussion: See response 10c(ii) above.
10d) Impact Discussion: The proposed project site is approximately 24 miles inland from the Pacific Ocean and there are no large bodies of water within the vicinity of the project site that would cause inundation by flood hazard, tsunami, seiche and risk release of pollutants.

Additionally, the City of Diamond Bar is not subject to any major flood hazards, or potential inundation due to nearby dam failures. The Federal Emergency Management Agency’s (FEMA) Flood Insurance Rate Map designated the entire City as within a Flood Zone “X”. Flood Zone “X” is identified as an area of 0.2 percent annual chance of flood. Therefore, no impacts would result from the future construction and operation of the proposed project. 10e) Impact Discussion: At the time of development, the project is required to implement an LID Plan prepared for the site, which is designed to comply with the Los Angeles County MS4 Permit, the Water Quality Control Plan for the Los Angeles Region, and the City of Diamond Bar Stormwater and Urban Runoff Pollution Control Ordinance (DBCC Section 8.12.1610). The project would not use groundwater directly, is not located in a designated groundwater recharge area, and its potable water demand would remain within the projections of the WVWD 2020 UWPM, so it would not interfere with sustainable groundwater management. Due to limited scope of ground disturbance, brief period of construction, and adherence to any Geotechnical Report recommendations and applicable existing regulations, the project would not conflict with or obstruct implementation of any water quality control or groundwater management plan. Therefore, impacts would be less than significant.

Issues and Supporting Information Sources:

Potentially
Significant
Impact
Less Than
Significant
With
Mitigation
Incorporated
Less Than
Significant
Impact
No Impact

11. LAND USE AND PLANNING. Would the project:
a) Physically divide an established community? ( ) ( ) ( ) () b) Cause a significant environmental impact due to a
conflict with any land use plan, policy, or regulation
adopted for the purpose of avoiding or mitigating
an environmental effect?
( ) ( ) () ( )
11a) Impact Discussion: The proposed project site would not disrupt or physically divide an established community. The project site is located within an existing gated residential community, surrounded by residential development.

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11b) Impact Discussion: In accordance with Title 21 of the City of Diamond Bar’s City Code, the project applicant has requested the approval of a Tentative Parcel Map to subdivide an existing lot into two lots for the future development of a single-family residence on the newly created lot.

If the subdivision is approved, the applicant shall submit a Development Review application for the approval of the project’s architectural and site design. With the approval of these entitlements, the development of the proposed project would be in compliance with all applicable City of Diamond Bar’s land use plan, policy, and regulations.

Issues and Supporting Information Sources:

Potentially
Significant
Impact
Less Than
Significant
With
Mitigation
Incorporated
Less Than
Significant
Impact
No Impact

12. MINERAL RESOURCES. Would the project:
a) Result in the loss of availability of a known mineral resource that would be of value to the region and
the residents of the State?
( ) ( ) ( ) ()
b) Result in the loss of availability of a locally
important mineral resource recovery site
delineated on a local general plan, specific plan or
other land use plan?
( ) ( ) ( ) ()
12a) Impact Discussion: The project site is not identified as a site with known mineral resources that would be of value to the region and the residents of the state. Therefore, the proposed project would have no impacts to mineral resources.
12b) Impact Discussion: The proposed project will not result in the loss of availability of a locallyimportant mineral resource recovery site delineated on a local general plan, specific plan, or other land use plan, because the site contains no known mineral resources.

Issues and Supporting Information Sources:

Potentially
Significant
Impact
Less Than
Significant
With
Mitigation
Incorporated
Less Than
Significant
Impact
No Impact

13. NOISE. Would the project result in:
a) Generation of a substantial temporary or
permanent increase in ambient noise levels in the
vicinity of the project in excess of standards
established in the local general plan or noise
ordinance, or applicable standards of other
agencies?
( ) ( ) () ( )
b) Generation of excessive groundborne vibration or
groundborne noise levels?
( ) ( ) () ( )
c) For a project located within the vicinity of a private airstrip or an airport land use plan or, where such
a plan has not been adopted, within two miles of a
public airport or public use airport, would the
project expose people residing or working in the
project area to excessive noise levels?
( ) ( ) ( ) ()
13a) Impact Discussion: There will be a temporary increase in noise levels during the future construction of the single-family residence, but it will not be substantial and shall remain within

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noise limits established by the City. The City of Diamond Bar’s City Code, Chapter 8.12 Division 3, Section 8.12.720 prohibits construction-related noise between the hours of 7:00 p.m. and 7:00 a.m. Construction activity is prohibited on Sundays and holidays. Noise from the short-term (less than ten days) operation of mobile construction equipment may not exceed a maximum of 85 dB.

Additionally, the proposed subdivision for the development of a new single-family residence is compatible with the single-family residential uses that surround the project site. The proposed use is not expected to exceed noise levels set forth in the Municipal Code for residential uses.

Therefore, impacts would be less than significant.
13b) Impact Discussion: Future construction activities have the potential to create groundborne vibration and/or groundborne noise levels. However, any impacts would be temporary and of minimal duration. Additionally, implementation of the construction hours would restrict these activities to daytime hours only. Therefore, impacts would be less than significant. 13c) Impact Discussion: Construction of the proposed project would have no impact with regard to airports. The project area is not located within two miles of any public airport or within an airport land use plan. Therefore, no impacts would occur.

Issues and Supporting Information Sources:

Potentially
Significant
Impact
Less Than
Significant
With
Mitigation
Incorporated
Less Than
Significant
Impact
No Impact

14. POPULATION AND HOUSING. Would the project:
a) Induce substantial population growth in an area,
either directly (for example, by proposing new
homes and businesses) or indirectly (for example,
through extension of roads or other
infrastructure)?
( ) ( ) () ( )
b) Displace substantial numbers of existing housing,
necessitating the construction of replacement
housing elsewhere?
( ) ( ) ( ) ()
14a) Impact Discussion: The increase of a new single-family residence is not significant in the context of the City as a whole or substantial for the area. Therefore, impacts would be less than significant.
14b) Impact Discussion: The project site is an existing lot with an existing single-family residence that is proposed to remain, therefore will not displace housing for substantial numbers of people as a result of this project.

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Issues and Supporting Information Sources:

Potentially
Significant
Impact
Less Than
Significant
With
Mitigation
Incorporated
Less Than
Significant
Impact
No Impact

15. PUBLIC SERVICES. Would the project:
a) Result in substantial adverse physical impacts
associated with the provision of new or physically
altered governmental facilities, need for new or
physically altered governmental facilities, the
construction of which could cause significant
environmental impacts, in order to maintain
acceptable service ratios, response times, or other
performance objectives for any of the public
services:
b) Fire protection? ( ) ( ) () ( )
c) Police protection? ( ) ( ) () ( )
d) Schools? ( ) ( ) () ( )
e) Parks? ( ) ( ) () ( )
f) Other public facilities? ( ) ( ) () ( )
15 a-e Impact Discussion: The marginal increase of a new residential unit from the proposed project are well within those anticipated in the City’s General Plan, and would not require the provision of new or altered governmental facilities for fire protection, police protection, schools, park, or other public facilities. However, the applicant is required to pay school fees to the Walnut Valley Unified School District (WVUSD) as part of the building permit process in order to help meet the potential funding needs created by the proposed increase in population, and the WVUSD would receive Average Daily Attendance (ADA) funding for any children attending public schools.

Additionally, the project will be conditioned to pay park fees in accordance with Diamond Bar City Code Section 21.32.040. Therefore, impacts would be less than significant.

Issues and Supporting Information Sources:

Potentially
Significant
Impact
Less Than
Significant
With
Mitigation
Incorporated
Less Than
Significant
Impact
No Impact

16. RECREATION. Would the project:
a) Increase the use of existing neighborhood and
regional parks or other recreational facilities such
that substantial physical deterioration of the facility would occur or be accelerated?
( ) ( ) () ( )
b) Does the project include recreational facilities or
require the construction or expansion of
recreational facilities, which might have an
adverse physical effect on the environment?
( ) ( ) () ( )
16a) Impact Discussion: The proposed project would not trigger the new construction or expansion of recreational facilities. Due to the marginal increase of a new residential unit from the proposed project, there may be some increased use of existing neighborhood recreational facilities, but it would not be expected to be significant or to significantly increase the physical deterioration of the facilities. In addition, the project site is located within a gated residential

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community that offers many amenities for their residents, including a swimming pool, board room, club house, community park, and tennis courts. The property owners would pay Homeowners Association dues to maintain the facilities within the Association. Additionally, the project will be conditioned to pay park fees in accordance with Diamond Bar City Code Section 21.32.040.

Therefore, impacts would be less than significant.
16b) Impact Discussion: See response 16a above.

Issues and Supporting Information Sources:

Potentially
Significant
Impact
Less Than
Significant
With
Mitigation
Incorporated
Less Than
Significant
Impact
No Impact

17. TRANSPORTATION. Would the project:
a) Conflict with a program, plan, ordinance or policy
addressing the circulation system, including
transit, roadway, bicycle and pedestrian facilities?
( ) ( ) () ( )
b) Conflict or be inconsistent with CEQA Guidelines
§ 15064.3, subdivision (b)?
( ) ( ) () ( )
c) Substantially increase hazards due to a geometric
design feature (e.g., sharp curves or dangerous
intersections) or incompatible uses (e.g., farm
equipment)?
( ) ( ) () ( )
d) Result in inadequate emergency access? ( ) ( ) () ( ) 17a) Impact Discussion: The proposed project is limited to the subdivision of one parcel into two lots. The subdivision itself would not alter the existing circulation system, change roadway configurations, or affect transit, bicycle, or pedestrian facilities. Any future development on the newly created lot would be subject to separate review for consistency with applicable City standards and regulations.

Bicycle Facilities: The General Plan identifies an existing and planned bicycle network consisting of Class I paths, Class II bike lanes, and Class III routes on selected City streets. Bicycle facilities are primarily provided along major corridors such as Diamond Bar Boulevard, Golden Springs Drive, and other arterials and collectors. Ridge Line Road is a local residential street and is not identified for dedicated bikeway facilities in the General Plan’s circulation diagram or bicycle network map. The project would not modify any striped bike lanes or designated bikeways on nearby arterials.

Pedestrian Facilities: The project site is located within an existing gated residential community, surrounded by residential development. There are no existing or planned sidewalks within The Country Estates. At the time development is proposed, the project would construct pedestrian walkways connecting the residential building, open space areas and to the Ridge Line Road frontage. The project would not remove existing sidewalks or crosswalks, would not create new barriers to pedestrian travel, and would provide new pedestrian connections that are compatible with the City’s circulation policies. As such, the project would not conflict with a program, plan, ordinance, or policy addressing transit, roadway, bicycle, or pedestrian facilities, and impacts would be less than significant.
17b) Impact Discussion: The project involves the subdivision of one parcel into two lots, allowing for the future development of one additional single-family residence consistent with the City's

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General Plan land use designation and zoning. The project is an infill residential development within an urbanized area served by existing roadways, utilities, and public services. The addition of one dwelling unit would generate a minimal number of daily vehicle trips and would not cause a substantial increase in vehicle miles traveled (VMT). Therefore, impacts related to VMT would be less than significant.
17c) Impact Discussion: The proposed project would not create any hazards due to design features or incompatible uses. Access to the project site would be required to comply with all City design standards, which would reduce potential impacts to a less than significant level. 17d) Impact Discussion: The proposed project would not significantly impact the adequacy of existing and future emergency services. The roadways and driveways are existing and will not be relocated. The proposed project would be constructed according to City of Diamond Bar and County of Los Angeles requirements for emergency access. Therefore, significant impacts would not result from the construction and operation of the proposed project.

Issues and Supporting Information Sources:

Potentially
Significant
Impact
Less Than
Significant
With
Mitigation
Incorporated
Less Than
Significant
Impact
No Impact

18. TRIBAL CULTURAL RESOURCES. Would the project:
a) Would the project cause a substantial adverse change in the significance of a tribal cultural resource,
defined in Public Resources Code § 21074 as
either a site, feature, place, cultural landscape that
is geographically defined in terms of the size and
scope of the landscape, sacred place, or object
with cultural value to a California Native American
tribe, and that is:
i) Listed or eligible for listing in the California
Register of Historical Resources, or in a
local register of historical resources as
defined in Public Resources Code section
5020.1(k), or
( ) () ( ) ( )
ii) A resource determined by the lead
agency, in its discretion and supported by
substantial evidence, to be significant
pursuant to criteria set forth in subdivision
(c) of Public Resources Code § 5024.1. In
applying the criteria set forth in subdivision
(c) of Public Resource Code § 5024.1, the
lead agency shall consider the significance
of the resource to a California Native
American tribe.
( ) () ( ) ( )
18a(i)-(ii) Impact Discussion: AB 52 requires that lead agencies evaluate a project’s potential impact on “tribal cultural resources,” which include “[s]ites, features, places, cultural landscapes, sacred places, and objects with cultural value to a California Native American tribe that are eligible for inclusion in the California Register of Historical Resources or included in a local register of historical resources.” AB 52 also gives lead agencies the discretion to determine, based on substantial evidence, whether a resource qualifies as a “tribal cultural resource.” AB 52 applies

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whenever a lead agency adopts an environmental impact report, mitigated negative declaration, or negative declaration.

AB 52 also establishes a formal consultation process for California tribes regarding tribal cultural resources. Under AB 52 the lead agencies are required to “begin consultation with a California Native American tribe that is traditionally and culturally affiliated with the geographic area of the proposed project.” Native American tribes to be included in the process are those that have requested notice of projects proposed within the jurisdiction of the lead agency. A notification list was obtained from the Native American Heritage Commission and the City sent notices to the Tribes on January 6, 2026, informing them of the opportunity to request consultation. On January 20, 2026, the Gabrieleño Band of Mission Indians – Kizh Nation requested formal consultation in writing and within the required timeframe, in accordance with AB 52. The Tribe indicated that the project area lies in an area where the ancestral territories of the Kizh (Kitc) Gabrieleño’s villages adjoined and overlapped. On February 19, 2026, the Tribe provided substantial evidence materials and requested tribal cultural resources mitigation measures for the project, including measures addressing Native American monitoring and the treatment of unanticipated discoveries.

Consultation Outcome
On February 19, 2026, consultation was completed pursuant to AB 52, and the City considered the Tribe’s information and recommendations in evaluating the project’s potential to affect tribal cultural resources. Although no tribal cultural resources are known to be present on the project site based on previous record and background research, ground-disturbing activities could expose previously unidentified tribal cultural resources because the project area is within the Tribe’s traditional and cultural territory. The Tribe provided substantial evidence materials and requested mitigation measures addressing Native American monitoring and procedures for unanticipated discoveries, and the City incorporated the Tribe’s requested mitigation measures verbatim into this IS/MND and the Mitigation Monitoring and Reporting Program.

Additionally, in the unlikely event that tribal cultural resources are found, the resources would require proper treatment in accordance with applicable laws, including Public Resources Code sections 5097.9 and 5097.98, Health and Safety Code section 7050.5, and State CEQA Guidelines Section 15064.5. In accordance with Public Resources Code section 21082.3(c) and CEQA Guidelines section 15120(d), any confidential tribal cultural resources information provided during consultation would be maintained in a confidential manner and would not be disclosed in the public IS/MND. With implementation of Mitigation Measures TCR-1 through TCR-3, the project’s potential impacts related to tribal cultural resources would be reduced to a less than significant level.

Mitigation Measures:

TCR-1: Retain a Native American Monitor Prior to Commencement of Ground-Disturbing Activities
A. The project applicant/lead agency shall retain a Native American Monitor from or approved by the Gabrieleño Band of Mission Indians – Kizh Nation. The monitor shall be retained prior to the commencement of any “ground-disturbing activity” for the subject project at all project locations (i.e., both on-site and any off-site locations that are included in the project description/definition and/or required in connection with the project, such as public improvement work). “Ground-disturbing activity” shall include, but is not limited to, demolition, pavement removal, potholing, auguring, grubbing, tree removal, boring, grading, excavation, drilling, and trenching.

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B. A copy of the executed monitoring agreement shall be submitted to the lead agency prior to the earlier of the commencement of any ground-disturbing activity, or the issuance of any permit necessary to commence a ground-disturbing activity.

C. The monitor will complete daily monitoring logs that will provide descriptions of the relevant ground-disturbing activities, the type of construction activities performed, locations of ground-disturbing activities, soil types, cultural-related materials, and any other facts, conditions, materials, or discoveries of significance to the Tribe. Monitor logs will identify and describe any discovered TCRs, including but not limited to, Native American cultural and historical artifacts, remains, places of significance, etc., (collectively, tribal cultural resources, or “TCR”), as well as any discovered Native American (ancestral) human remains and burial goods. Copies of monitor logs will be provided to the project applicant/lead agency upon written request to the Tribe.

D. On-site tribal monitoring shall conclude upon the latter of the following (1) written confirmation to the Kizh from a designated point of contact for the project applicant/lead agency that all ground-disturbing activities and phases that may involve ground-disturbing activities on the project site or in connection with the project are complete; or (2) a determination and written notification by the Kizh to the project applicant/lead agency that no future, planned construction activity and/or development/construction phase at the project site possesses the potential to impact Kizh TCRs.

TCR-2: Unanticipated Discovery of Tribal Cultural Resource Objects (Non-Funerary/NonCeremonial) A. Upon discovery of any TCRs, all construction activities in the immediate vicinity of the discovery shall cease (i.e., not less than the surrounding 50 feet) and shall not resume until the discovered TCR has been fully assessed by the Kizh monitor and/or Kizh archaeologist. The Kizh will recover and retain all discovered TCRs in the form and/or manner the Tribe deems appropriate, in the Tribe’s sole discretion, and for any purpose the Tribe deems appropriate, including for educational, cultural and/or historic purposes.

TCR-3: Unanticipated Discovery of Human Remains and Associated Funerary or Ceremonial Objects
A. Native American human remains are defined in PRC 5097.98 (d)(1) as an inhumation or cremation, and in any state of decomposition or skeletal completeness. Funerary objects, called associated grave goods in Public Resources Code Section 5097.98, are also to be treated according to this statute.

B. If Native American human remains and/or grave goods are discovered or recognized on the project site, then Public Resources Code 5097.9 as well as Health and Safety Code Section 7050.5 shall be followed.

C. Human remains and grave/burial goods shall be treated alike per California Public Resources Code section 5097.98(d)(1) and (2).

D. Preservation in place (i.e., avoidance) is the preferred manner of treatment for discovered human remains and/or burial goods.

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Initial Study for City of Diamond Bar
Tentative Parcel Map No. 83773 (Planning Case No. PL2022-119) Page 25 Rev 02/26/2026
E. Any discovery of human remains/burial goods shall be kept confidential to prevent further disturbance.

Issues and Supporting Information Sources:

Potentially
Significant
Impact
Less Than
Significant
With
Mitigation
Incorporated
Less Than
Significant
Impact
No Impact

19. UTILITIES AND SERVICE SYSTEMS. Would the
project:
a) Require or result in the relocation or construction
of new or expanded water, wastewater treatment
or storm water drainage, electric power, natural
gas, or telecommunications facilities, the
construction or relocation of which could cause
significant environmental effects?
( ) ( ) () ( )
b) Have sufficient water supplies available to serve
the project and reasonably foreseeable future
development during normal, dry and multiple dry
years?
( ) ( ) () ( )
c) Result in a determination by the waste water
treatment provider, which serves or may serve the
project that it has adequate capacity to serve the
project’s projected demand in addition to the
provider’s existing commitments?
( ) ( ) () ( )
d) Generate solid waste in excess of state or local
standards, or in excess of the capacity of local
infrastructure, or otherwise impair the attainment
of solid waste reduction goals?
( ) ( ) () ( )
e) Comply with federal, state, and local management
and reduction statutes and regulations related to
solid waste?
( ) ( ) () ( )
19a) Impact Discussion: The proposed project would not result in significant impacts and would not exceed wastewater treatment requirements of the applicable Regional Water Quality Control Board, and would have a less than significant impact on the need to construct new water or wastewater treatment facilities or expansion of existing facilities. Additionally, the following agencies reviewed the proposed project and have stated it is prepared to provide its services:
 County Sanitation Districts of Los Angeles County correspondence dated February 3, 2023  Walnut Valley Water District correspondence dated February 7, 2023  Southern California Edison correspondence dated March 13, 2023  Southern California Gas Company correspondence dated March 8, 2023 19b) Impact Discussion: See response 19a above.
19c) Impact Discussion: The County Sanitation Districts of Los Angeles County reviewed the proposed project and, in a correspondence dated February 3, 2023, states it is prepared to provide wastewater service to this project.

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Initial Study for City of Diamond Bar
Tentative Parcel Map No. 83773 (Planning Case No. PL2022-119) Page 26 Rev 02/26/2026
19d) Impact Discussion: Refuse and recycling service is provided by Valley Vista Services for single-family residential developments. The company transports collected materials to their own processing facility, the Grand Central Recycling and Transfer Station located in the City of Industry. Because the Grand Central Recycling and Transfer Station is a transfer and processing facility and not a landfill, it does not have a set expiration year or a finite volumetric capacity.

Unlike landfills, a transfer station operates as a daily transit point. Waste is brought in, sorted for recycling, consolidated, and hauled away to regional landfills within 48 hours. All solid waste materials generated at the project site would be disposed of in accordance with applicable state, federal, and local statutes and regulations.
19e) Impact Discussion: See response 19d above.

Issues and Supporting Information Sources:

Potentially
Significant
Impact
Less Than
Significant
With
Mitigation
Incorporated
Less Than
Significant
Impact
No Impact

20. WILDFIRE. Would the project:
a) Substantially impair an adopted emergency
response plan or emergency evacuation plan?
( ) ( ) ( ) ()
b) Due to slope, prevailing winds, and other factors,
exacerbate wildfire risks, and thereby expose
project occupants to pollutant concentrations from
a wildfire or the uncontrolled spread of a wildfire?
( ) ( ) () ( )
c) Require the installation or maintenance of
associated infrastructure (such as roads, fuel
breaks, emergency water sources, power lines or
other utilities) that may exacerbate fire risk or that
may result in temporary or ongoing impacts to the
environment?
( ) ( ) () ( )
d) Expose people or structures to significant risks,
including downslope or downstream flooding or
landslides, as a result of runoff, post-fire slope
instability, or drainage changes?
( ) ( ) () ( )
20a) Impact Discussion: The City of Diamond Bar does not have an adopted emergency evacuation plan; however, the City facilitates the coordination of emergency response efforts through its Emergency Operations Center (EOC), which is a central location of authority that allows for face-to-face coordination and decision making between City staff and outside organization. The project does not propose to modify and would not interfere with the EOC. Future construction activities would be located on the project site. No lane closures are expected to be required during construction activities. As a result, future construction activities would not impair or interfere with emergency response or emergency evacuation. 20b) Impact Discussion: At the time when a single-family residential development is proposed, the project will be required to prepare a Fuel Modification Plan which shall be reviewed by the Los Angeles County Fire District (LACFD) to review location of structures, type of construction, topography, slope, amount and arrangement of vegetation and overall site setting. Therefore, impacts would be less than significant.

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Initial Study for City of Diamond Bar
Tentative Parcel Map No. 83773 (Planning Case No. PL2022-119) Page 27 Rev 02/26/2026
20c) Impact Discussion: At the time a single-family residential development is proposed, the project will be required to obtain approval from the HOA and any other applicable agencies for potential impacts to their facilities. Therefore, impacts would be less than significant. 20d) Impact Discussion: At the time when a single-family residential development is proposed, the project will be required to submit a detailed geotechnical investigation report that includes field exploration, laboratory testing and analyses. Therefore, the proposed project would have less than significant impacts to expose people or structures to significant risks, including downslope or downstream flooding or landslides, as a result of runoff, post-fire slope instability, or drainage changes.

Issues and Supporting Information Sources:

Potentially
Significant
Impact
Less Than
Significant
With
Mitigation
Incorporated
Less Than
Significant
Impact
No Impact

21. MANDATORY FINDINGS OF SIGNIFICANCE
a) Does the project have the potential to substantially degrade the quality of the environment,
substantially reduce the habitat of a fish or wildlife
species, cause a fish or wildlife population to drop
below self-sustaining levels, threaten to eliminate
a plant or animal community, substantially reduce
the number or restrict the range of a rare or
endangered plant or animal or eliminate important
examples of the major periods of California history
or prehistory?
( ) ( ) () ()
b) Does the project have impacts that are individually
limited, but cumulatively considerable?
(“Cumulatively considerable” means that the
incremental effects of a project are considerable
when viewed in connection with the effects of past
projects, the effects of other current projects, and
the effects of probable future projects.
( ) ( ) () ( )
c) Does the project have environmental effects which
will cause substantial adverse effects on human
beings, either directly or indirectly?
( ) ( ) () ( )
21a) Impact Discussion: The project site does not contain the habitat of a fish or wildlife species and therefore future construction of the proposed project would not cause a fish or wildlife population to drop below self-sustaining levels, threaten to eliminate a plant or animal community, or reduce or restrict the range of a rare or endangered plant or animal. Likewise, approval of the proposed project is not anticipated to eliminate examples of major periods of California history or prehistory.
21b) Impact Discussion: The cumulatively considerable impacts of the individually limited project are not expected to be significant and are in keeping with the long-range considerations of the City’s General Plan. With the mitigation measures and conditions of project approval, the cumulative impact of the individually limited project impacts will not be considerable.

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Initial Study for City of Diamond Bar
Tentative Parcel Map No. 83773 (Planning Case No. PL2022-119) Page 28 Rev 02/26/2026
21c) Impact Discussion: With the mitigation measures and conditions of project approval, no substantial direct or indirect adverse environmental effects on human beings can be expected from this project.

SOURCES CITED IN THE EVALUATION OF ENVIRONMENTAL IMPACTS Planning No. PL2022-119

1. City of Diamond Bar 2040 General Plan and Climate Action Plan Environmental Impact Report certified December 17, 2019, Addendum No. 1 dated August 11, 2022 and Addendum No. 2 dated March 17, 2026

2. Diamond Bar City Code

3. City of Diamond Bar Transportation Study Guidelines for Vehicle Miles Traveled and Level of Service Assessment dated November 2025.

4. Tentative Parcel Map No. 83773

5. Hydrology Report prepared by Civil Trans Inc. dated June 5, 2026

6. Letter from Gabrieleño Band of Mission Indians (Kizh Nation) Tribe Dated February 19, 2026

7. All documents cited above are available for review at the City of Diamond Bar, Community Development Department, 21810 Copley Drive, Diamond Bar, CA 91765. The office hours are Monday through Thursday between 7:30 a.m. and 5:30 p.m., and Friday between 7:30 a.m. and 4:30 p.m.

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RIDGE
LINE ROAD BENCHMARK: LEGAL DESCRIPTION: VICINITY MAP BASIS OF BEARING: ABBREVIATIONS: LEGEND: UTILITIES: SUBDIVISION NOTES: TENTATIVE PARCEL MAP NO. 83773 IN THE CITY OF DIAMOND BAR PROJECT SITE SUBDIVISION AREAS RIDGE LINE ROAD SECTION A-A EASEMENT NOTES CIVIL TRANS INC ADJUSTED LOT 62 PER COC NO. LLA-18-79 DIAMOND BAR, CA. APN: 8713-004-016 TENTATIVE PARCEL MAP NO. 83773 1 Received
07/29/2026
City of Diamond Bar 06/24/2026

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RIDGE

LINE ROAD
Δ
Δ
℄
Δ
Δ
ABBREVIATIONS: LEGEND:

CIVIL TRANS INC
ADJUSTED LOT 62 PER COC NO. LLA-18-79
DIAMOND BAR, CA.

APN: 8713-004-016

PROPOSED SITE PLAN
1 EASEMENT NOTES
NOTES: PROJECT SCOPE OF WORK
AVERAGE SLOPE=ENTIRE LOT PRIOR TO SUBDIVISION

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VICINITY MAP PRELIMINARY GRADING PLAN FOR PARCEL 2 OF TENTATIVE PARCEL MAP NO. 83773 DIAMOND BAR, CALIFORNIA SHEET INDEX: GRADING GENERAL NOTES: GRADING GENERAL NOTES: (CONTINUED) EARTHWORK QUANTITIES: ABBREVIATIONS: LEGEND WORK TO BE DONE: PROJECT SITE

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RIDGE LINE ROAD Δ ℄ Δ Δ B A A B Δ Δ
CONSTRUCTION NOTES :

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SECTION A-A

SECTION B-B

SAW CUT - CONTROL JOINT
(TRANSVERSE OR LONGITUDINAL)
RIP-RAP - DETAIL NO. 4
BACK DRAINAGE DETAIL NO. 1

RETAINING WALL

MODIFIED GRAVEL BOTTOM
CATCH BASIN DETAIL NO. 3
DRIVEWAY CONCRETE PAVEMENT DETAIL NO. 2

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SECTION C-C

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PLANNING COMMISSION
RESOLUTION NO. 2026- 11

A RESOLUTION OF THE PLANNING COMMISSION OF THE CITY OF DIAMOND BAR,

CALIFORNIA, RECOMMENDING APPROVAL OF MITIGATED NEGATIVE DECLARATION AND TENTATIVE PARCEL MAP NO. 83773 FOR THE SUBDIVISION OF AN EXISTING

2.3 ACRE LOT INTO TWO LOTS FOR THE FUTURE DEVELOPMENT OF A NEW SINGLE-FAMILY RESIDENCE ON THE NEWLY CREATED LOT LOCATED AT 23901 RIDGE LINE ROAD, DIAMOND BAR, CALIFORNIA ( APN 8713- 004- 016).

A. RECITALS

1. The property owner, Arun Jain, and applicant, Pete Volbeda, have filed an application for Tentative Parcel Map No. 83773 Case No. PL2022- 119 to subdivide an existing lot into two separate lots for the development of a singlefamily residence on the newly created lot located at 23901 Ridge Line Road.

Hereinafter in this resolution, the subject Tentative Parcel Map shall be collectively referred to as the " Project."

2. The subject property is made up of one parcel totaling 100, 188 gross square feet ( 2. 3 acres). It is located in the Rural Residential ( RR) zone with an underlying General Plan land use designation of Rural Residential.

3. The legal description of the subject property is Lot 62 of Tract No. 30091. The Assessor' s Parcel Number is 8713- 004- 016.

4. Notification of the public hearing for this project was published in the San Gabriel Valley Tribune newspaper on August 28, 2026. Public hearing notices were mailed to property owners within a 1000- foot radius of the project site. In addition to the published and mailed notices, the project site was posted with a display board and public notices were posted at the City' s designated community posting sites.

6. The documents and materials constituting the administrative record of the proceedings upon which the City' s decision is based are located at the City of Diamond Bar, Community Development Department, Planning Division, 21810 Copley Drive, Diamond Bar, CA 91765.

B. RESOLUTION
NOW, THEREFORE, it is found, determined and resolved by the Planning Commission of the City of Diamond Bar as follows:

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1. The Planning Commission hereby specifically finds that all of the facts set forth in the Recitals, Part A, of this Resolution are true and correct; and

2. In accordance to the provisions of the California Environmental Quality Act CEQA), Section 15070, the City prepared and filed an Initial Study and Notice of Intent to Adopt Mitigated Negative Declaration for the project on August 12, 2026, with the Los Angeles County Clerk. Pursuant to CEQA Section 15105, the public review period for the Mitigated Negative Declaration began on August 12, 2026, and ended September 1, 2026, for a total of 20 days.

C. FINDINGS OF FACT
Based on the findings and conclusions set forth herein and as prescribed under Diamond Bar City Code ( DBCC) Section 21. 20, this Planning Commission hereby recommends that the City Council make the following findings:

1. The Planning Commission hereby specifically finds and determines that, having considered the record as a whole including the findings set forth below, and changes and alterations which have been incorporated into and conditioned upon the proposed project set forth in the application, there is no evidence before this Planning Commission that the project proposed herein will have the potential of an adverse effect on wild life resources or the habitat upon which the wildlife depends. Based upon substantial evidence, this Planning Commission hereby rebuts the presumption of adverse effects contained in Section 753. 5( d) of Title 14 of the California Code of Regulations; Tentative Map Findings: Pursuant to Subdivision Code Section 21. 20. 080 of the City' s Subdivision Ordinance, the Planning Commission recommends that the City Council make the following findings:
a. The proposed subdivision, together with the provisions for its design and improvement, is consistent with the general plan and any applicable specific plan;
The proposed project involves the subdivision of an existing 100, 188 square -foot ( 2.3 gross acre) lot developed with an existing single-family residence into two lots for the future development of a new single- family residence on the newly created lot. Proposed Parcel 1 is 48,352 square feet ( 1. 11 gross acres) and proposed Parcel 2 is 51, 836 square feet

1. 19 gross acres). The property is zoned Rural Residential ( RR), and the underlying General Plan land use designation is also named Rural Residential. The development of a single- family residence on Parcel 2 will be processed through a Development Review application for compliance with the City's General Plan, City Design Guidelines and development standards. The project will provide additional homeownership opportunities of single-family housing that will be compatible with the surrounding development.

The project site is not part of any theme area, specific plan, community plan, boulevard or planned development.
2 PC Resolution No. 2026- 11

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The site is physically suitable for the type and proposed density of development;
The proposed subdivision will not interfere with the use and enjoyment of neighboring existing or future developments because the use of each lot is for a single- family home and the surrounding uses are also singlefamily homes. The maximum allowed density for the Rural Residential general plan land use designation and zoning district is one dwelling unit per gross acre ( 1 DU/Acre). Therefore, with a 2.3- acre lot, the proposed project is in compliance with the City's General Plan with regards to density. Also, the proposed location of the building pads and footprints are in compliance with the development standards.

C. The design of the subdivision or the proposed improvements will not cause substantial environmental damage or injure fish or wildlife or their habitat;
An initial study was prepared and it was determined that the proposed project qualifies for a Mitigated Negative Declaration. With the proposed mitigation measures, the project will not have a significant effect on the environment. In accordance to the provisions of Section 15070 of the CEQA guidelines, the City prepared and filed a Notice of Availability and Intent to Adopt a Mitigated Negative Declaration for the project on August 12, 2026, with the Los Angeles County Clerk. Pursuant to CEQA Section 15015, the public review period for the Mitigated Negative Declaration began August 12, 2026, and ended September 1, 2026.

The design of the subdivision or type of improvements will not cause serious public health or safety problems;
For the future development of the new single- family residence, grading shall be constructed, operated, and maintained in accordance with the recommendations contained in a preliminary geotechnical investigation to assure that geotechnical stability is maintained or increased. Detailed drainage and hydrology studies shall be completed, including the potential for debris flows, and the proposed conditions of approval will likely prevent any significant increases in erosion and flood hazards.

PC Resolubon No. 2026- 11

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The proposed subdivision will not interfere with easements, vehicular or pedestrian movements, such as access or other functional requirements of a single-family residence because the proposed parcels will comply with the requirements for driveway widths.
f. The discharge of sewage from the proposed subdivision into the community sewer system would not result in violation of existing requirements prescribed by the California Regional Water Quality Control Board;
The proposed subdivision will not violate any requirement of the California Regional Water Quality Control Board. The project will be connecting to the existing public sewer system which is in compliance with the California Regional Water Quality Control Board. g. A preliminary soils report or geologic hazard report does not indicate adverse soil or geologic conditions; and
For the future development of the new single- family residence, grading shall be constructed, operated, and maintained in accordance with the recommendations contained in a preliminary geotechnical investigation to ensure that geotechnical stability is maintained or increased. h. The proposed subdivision is consistent with all applicable provisions of the City's Subdivision Ordinance, the Development Code, and the Subdivision Map Act.

The proposed subdivision is consistent with the City's Subdivision Ordinance, Subdivision Map Act, and applicable Development Code. In addition, the development of a new single- family residence on the newly created lot will be processed through a Development Review application for compliance with the City' s development standan: ls.

2. Based on the findings and conclusions set forth hr-rein, the Planning Commission hereby recommends that the City Council approve Tentative Parcel Map No. 83773, subject to the following conditions and the attached Standard Conditions of Approval:
a. GENERAL

1. The following Conditions of Approval, including the Standard Conditions of Approval attached hereto, shall be binding on and enforceable against, and, whenever used herein, the terms " applicant", owner", and/ or " applicant/ owner' shall mean and refer to, each of the following: the project applicant, Pete Volbeda, the owner( s), Arun Jain, and tenants( s) of the property, and each of their respective successors and assigns.
4 PC Resolution No. 2026- 11

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2. This approval shall not be effective for any purpose until the applicant/ owner of the property involved has filed, within twenty- one 21) days of approval of this Tentative Parcel Map No. 83773, Case No. PL2022- 119, at the City of Diamond Bar Community Development Department, an affidavit stating that the applicant/ owner is aware of and agrees to accept all the conditions of this approval. Further, this approval shall not be effective until the applicant pays the remaining City processing fees.

3. Within five days of this approval, the subdivider/ applicant shall pay to the City, the Department of Fish and Wildlife fee pursuant to Section 711. 4 of the Fish and Game Code.

4. The subdivision shall comply with the Conditions of Approval attached hereto and referenced herein.

5. The development of a new single-family residence on the new lot shall be submitted for review and approval of a Development Review application and shall comply with the City' s Development Code.

6. Prior to any use of the project site being commenced thereon, all conditions of approval shall be completed.

7. The project site shall be maintained and operated in full compliance with the conditions of approval and all laws, or other applicable regulations.

9. Standard Conditions. The applicant shall comply with the standard development conditions attached hereto.
b. TENTATIVE PARCEL MAP CONDITIONS

Final map approval will not be granted unless the map is in substantial compliance with Tentative Parcel Map No. 83773 including all conditions, and the applicant has entered into a subdivision improvement agreement to the satisfaction of the City Attorney. 5 PC Resolution No. 2026- 11

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3. This approval of Tentative Parcel Map No. 83773, Case No. Pl_2022- 119 expires three years from the date of approval if the use has not been exercised as defined per Diamond Bar City Code Section DBCC) 21. 20. 140. The applicant may request for a time extension if such request submitted to the City in writing is no less than 30 days prior to the approval' s expiration date, subject to DBCC Section 21. 20. 150 for City Council approval.

5. Approval of the Tentative Parcel Map is for subdivision of land only. No land use or development entitlements are expressed or implied.

6. The development shall provide parcels, easements or rights -of -way for private streets, water supply and distribution systems, sewage disposal systems, storm drainage facilities, solid waste disposal and public utilities providing electric, gas, and telecommunications services.

7. All utilities shall be installed underground in compliance with DBCC Section 21. 30.110.

9. Prior to final parcel map approval, the subdivider shall pay a parkland dedication in lieu fee for park and recreational purposes in the amount of $ 47,600, which equals the parkland obligation derived from the formula in DBCC Section 21. 32. 040( C) times the average per -acre fair market value for the appropriate park planning area. For the purposes of determining the required fee, the term " fair market value" shall mean the market value of the land as determined by the City staff, and approved by the Commission or Council, prior to or at tentative map approval.

10. Approval of Tentative Parcel Map No. 83773 shall not be interpreted as repealing, abrogating, or annulling any private easement, covenant, or dual restriction imposed on the subject property.

The Planning Commission shall:
6 PC Resolution No. 2026- 11

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a) Certify to the adoption of this Resolution; and
b) Forthwith transmit a certified copy of this Resolution, by certified mail, to: Arun Jain, 23901 Ridge Line Road, Diamond Bar, CA 91765, and Pete Volbeda, 215 N. 2nd Avenue Suite B, Upland, CA 91786.

APPROVED AND ADOPTED THIS 8TH DAY OF SEPTEMBER 2026, BY THE PLANNING COMMISSION OF THE CITY OF DIAMOND BAR.
in
Brian Worthington, Chairperson
I, Greg Gubman, Planning Commission Secretary, do hereby certify that the foregoing Resolution was duly introduced, passed, and adopted, at a regular meeting of the Planning Commission held on the 8th day of September, 2026, by the following vote:

AYES: 5 Commissioners: Rawlings, Torres, Mehta, Mao, Worthington NOES: 0 Commissioners: None
ABSENT: 0 Commissioners: None
ABSTAIN: 0 Commissioners: None
ATTEST:

Greg Gubman, Secretary
7 PC Resolution No. 2026- 11

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AW COMMUNITY DEVELOPMENT DEPARTMENT

STANDARD CONDITIONS

USE PERMITS, COMMERCIAL AND RESIDENTIAL NEW AND

REMODELED STRUCTURES
PROJECT #: Tentative Parcel Map No. 83773, Case No. PL2022- 119 SUBJECT: To subdivide an existing 100, 188 square -foot ( 2. 3 gross acre) lot into two separate lots for the development of a single- family residence on the newly created lot
PROPERTY Arun Jain, 23901 Ridge Line Road, Diamond Bar, CA 91765 OWNER:

APPLICANT: Pete Volbeda, 215 N 2nd Avenue, Suite B, Upland, CA 91786 LOCATION: 23901 Ridge Line Road, Diamond Bar, CA 91765
ALL OF THE FOLLOWING CONDITIONS APPLY TO YOUR PROJECT.

APPLICANT SHALL CONTACT THE PLANNING DIVISION AT ( 909) 839-7030, FOR COMPLIANCE WITH THE FOLLOWING CONDITIONS:

A. GENERAL REQUIREMENTS

1. The applicant shall defend, indemnify, and hold harmless the City, and its officers, agents and employees, from any claim, action, or proceeding to attack, set -aside, void or annul the approval of the Project. In the event the City and/ or its officers, agents and employees are made a party of any such action:
a) Applicant shall provide a defense to the City defendants or at the City' s option reimburse the City its costs of defense, including reasonable attorneys fees, incurred in defense of such claims.
b) Applicant shall promptly pay any final judgment rendered against the City defendants.
c) The City shall promptly notify the applicant of any claim, action of proceeding, and shall cooperate fully in the defense thereof.

2. Within thirty ( 30) days of this approval, Applicant shall execute and file with the City an affidavit indicating full understanding and concurrence with the approval 8 PC Resolution No. 2026- 11

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and all conditions of approval; and pay all remaining outstanding City processing fees, school fees and fees for the review of submitted reports DBCC Section 22. 66. 0201.

3. Within three days of this project' s approval, the subdivider/ applicant shall remove the public hearing notice board.

4. The project site shall be maintained and operated in full compliance with the conditions of approval and all laws, or other applicable Federal, State, or City regulations.

5. The applicant shall comply with all applicable requirements of City Planning, Building and Safety Divisions, Public Works Department, and the Los Angeles County Fire Department.

6. City's approval of the proposed project shall not waive the applicant's obligation to comply with all applicable sections of the Development Code, all other applicable City Ordinances, and any applicable Specific Plan.

B. FEES/ DEPOSITS

1. Prior to final parcel map approval as required by the City, applicant shall pay development fees ( including but not limited to Planning, Building and Safety Divisions, and Public Works Department) at the established rates. In addition, the applicant shall pay all remaining prorated City project review and processing fees prior to final parcel map approval.

2. Prior to any plan check, all deposit accounts for the processing of this project shall have no deficits.

APPLICANT SHALL CONTACT THE PUBLIC WORKS/ ENGINEERING DEPARTMENT AT 909) 839- 7040, FOR COMPLIANCE WITH THE FOLLOWING CONDITIONS:

A. GENERAL

1. A title report/ guarantee showing all fee owners, interest holders, and nature of interest shall be submitted for final map plan check. Prior to final map approval, applicant shall submit an updated title report/ guarantee and subdivision guarantee ten ( 10) business days.

3. A permit from the Los Angeles County Public Works Department shall be required for connection to its facilities.

4. Prior to final map approval, applicant shall submit written certifications to the City that all utility services and any other service related to the site shall be 9 PC Resolution N0. 2026- 11

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available to serve the proposed project. Such letters shall be issued by the district, utility and cable television company, within ninety ( 90) days prior to final map approval.

5. All identified geologic hazards within the tentative parcel map boundaries which cannot be eliminated as approved by the City Engineer shall be indicated on the final map as " Restricted Use Area" subject to geologic hazard. The applicant shall dedicate to the City the right to prohibit the erection of buildings or other structures within such restricted use areas shown on the final map.

6. Easements and the utility companies, for public utility and public services purposes shall be offered and shown on the final map for dedication to the City.

7. After the final map recordation, applicant shall submit to the Public Works/ Engineering Department, at no cost to the City, a full size of electronic copy of the recorded map. Final approval of the public or private improvements shall not be given until the copy of the recorded map is received by the Public Works/Engineering Department

8. All activities/ improvements for the proposed Tentative Parcel Map shall be wholly contained within the boundaries of the map. Should any off -site activities/improvements be required, approval shall be obtained from the affected property owner and the City as required by the City Engineer.

B. GRADING

1. No grading or any staging or construction shall be performed prior to final map approval by the City Council and map recordation.

C. UTILITIES

1. Easements for public utilities and public services purpose shall be offered and shown on the detailed site plan for affected utility company.

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Underground utilities shall not be constructed within the drip line of any mature tree except as approved by a registered arborist.

The sanitary sewer system serving the parcels shall be connected to the Los Angeles County maintained sewer system. Said system shall be of the size, grade and depth approved by the City Engineer, the County Sanitation District and Los Angeles County Public Works Department.
r:7RI
11 PC Resolution No. 2026- 11

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Diamond Bar City CouncilOctober 6, 2026

Diamond Bar City Council
October 6, 2026