Yorba Linda City Council
February 3, 2026

QC Sample Results
Client: Aptim Environmental & Infrastructure Inc Job ID: 440-265252-1 Project/Site: Young Farm UST Removal SDG: Yorba Linda, CA Method: 82608 - Volatile Organic Compounds (GC/MS) (Continued) Lab Sample ID: 440-265252-1 MSD Client Sample ID: TANK-YF-N-5' Matrix: Solid Prep Type: Total/NA
Analysis Batch: 606880
Sample Sample Spike MSO MSO %Rec. RPO
Analyte Result Qualifier Added Result Qualifier Unit 0 %Rec Limits RPO Limit 1,2-Dichloroethane ND 0.0199 0.0160 mg/Kg 81 60 - 150 --0 ~ 1,2-Dichloropropane ND 0.0199 0.0191 mg/Kg 96 65-130 2 20 1, 3, 5-T rimethylbenzene ND 0.0199 0.0203 mg/Kg 102 65-135 6 25 1,3-Dichlorobenzene ND 0.0199 0.0186 mg/Kg 94 70 - 130 4 25 1,3-Dichloropropane ND 0.0199 0.0199 mg/Kg 100 65-140 2 25 EJ 1,4-Dichlorobenzene ND 0.0199 0.0186 mg/Kg 94 70- 130 3 25 2,2-Dichloropropane ND 0.0199 0.0212 mg/Kg 106 65-150 6 25 2-Chlorotoluene ND 0.0199 0.0201 mg/Kg 101 60 - 135 5 • 25 4-Chlorotoluene ND 0.0199 0.0203 mg/Kg 102 65-135 4 25
Benzene ND 0.0199 0.0188 mg/Kg 95 65-130 9 20
Bromobenzene ND 0.0199 0.0192 mg/Kg 97 65- 140 3 25
Bromochloromethane ND 0.0199 0.0169 mg/Kg 85 65- 145 2 25 Bromodichloromethane ND 0.0199 0.0168 mg/Kg 85 65-145 0 20 Bromoform ND 0.0199 0.0169 mg/Kg 85 50 - 145 30
Bromomethane ND 0.0199 0.0160 mg/Kg 80 60- 155 10 25
Carbon tetrachloride ND 0.0199 0.0177 mg/Kg 89 60 - 145 9 25 Chlorobenzene ND 0.0199 0.0196 mg/Kg 99 70 - 130 6 25
Chloroethane ND 0.0199 0.0170 mg/Kg 86 60 - 150 8 25
Chloroform ND 0.0199 0.0174 mg/Kg 87 65- 135 5 20
Chloromethane ND 0.0199 0.0134 mg/Kg 68 40 - 145 7 25
cis-1,2-Dichloroethene ND 0.0199 0.0186 mg/Kg 94 65-135 7 25 cis-1 , 3-Dichloropropene ND 0.0199 0.0194 mg/Kg 98 70 - 135 4 25 Dibromochloromethane ND 0.0199 0.0179 mg/Kg 90 60-145 3 25 Dibromomethane ND 0.0199 0.0180 mg/Kg 90 65-140 6 25
Dichlorodifluoromethane ND 0.0199 0.0103 mg/Kg 52 30 - 160 6 35 Ethyl benzene ND 0.0199 0.0200 mg/Kg 101 70 - 135 7 25
Hexachlorobutadiene ND 0.0199 0.0159 mg/Kg 80 50 - 145 5 35 lsopropylbenzene ND 0.0199 0.0196 mg/Kg 99 70 - 145 5 25 m,p-Xylene ND 0.0199 0.0205 mg/Kg 103 70- 130 5 25
Methylene Chloride ND 0.0199 ND mg/Kg 84 55-145 5 25
Methyl-t-Butyl Ether (MTBE) ND 0.0199 0.0197 mg/Kg 92 55-155 4 35 Naphthalene ND 0.0199 0.0170 mg/Kg 86 40-150 0 40
n-Butylbenzene ND 0.0199 0.0187 mg/Kg 94 55-145 2 30
N-Propylbenzene ND 0.0199 0.0209 mg/Kg 105 65-140 5 25
o-Xylene ND 0.0199 0.0204 mg/Kg 103 65-130 5 25
sec-Butyl benzene ND 0.0199 0.0200 mg/Kg 101 60 - 135 5 25 Styrene ND 0.0199 0.0183 mg/Kg 92 70 - 140 4 25
Tert-amyl-methyl ether (TAME) ND 0.0199 0.0248 mg/Kg 125 60 - 150 2 25 tert-Butylbenzene ND 0.0199 0.0209 mg/Kg 105 60- 140 6 25 Tetrachloroethene ND 0.0199 0.0211 mg/Kg 106 65- 135 9 25 Toluene ND 0.0199 0.0204 mg/Kg 102 70- 130 9 20
trans-1 ,2-Dichloroethene ND 0.0199 0.0 175 mg/Kg 88 70- 135 6 25 trans-1 ,3-Dichloropropene ND 0.0199 0.0194 mg/Kg 98 60 - 145 4 25 Trichloroethene ND 0.0199 0.0194 mg/Kg 97 65-140 10 25
Trichlorofluoromethane ND 0.0199 0.0159 mg/Kg 80 55-155 7 25 Vinyl chloride ND 0.0199 0.0142 mg/Kg 72 55 _ 140 12 30 lsopropyl Ether (DIPE) ND 0.0199 0.0195 mg/Kg 98 60 - 150 5 25 Ethyl-t-butyl ether (ETBE) ND 0.0199 0.0212 mg/Kg 106 60 - 145 1 30 tert-Butyl alcohol (TBA) ND 0.199 0.201 mg/Kg 101 65- 145 3 30 Eurofins Calscience Irvine

Client: Aptim Environmental & Infrastructure Inc
Project/Site: Young Farm UST Removal
QC Sample Results
Method: 82608 - Volatile Organic Compounds (GC/MS) (Continued) Lab Sample ID: 440-265252-1 MSD
Matrix: Solid
Analysis Batch: 606880
Analyte
p-lsopropyltoluene
Surrogate
Toluene-dB (Surr)
4-Bromofluorobenzene (Surr)
Dibromofluoromethane (Surr)
Sample Sample
Result Qualifier
---~N=o

MSD MSD
%Recovery Qualifier
104
104
94 Spike
Added

0.0199
Limits
79-123
79-120
60- 120

MSD MSD
Result Qualifier

0.0194
Unit
mg/Kg
Method: 82608/CA_LUFTMS - Volatile Organic Compounds by GC/MS Lab Sample ID: MB 440-606887/5
Matrix: Solid
Analysis Batch: 606887
MB
Analyte Result
Volatile Fuel Hydrocarbons (C4-C12) ND
MB
Surrogate %Recovery
Dibromofluoromethane (Surr) 95
4-Bromofluorobenzene (Surr) 106
Toluene-dB (Surr) 105
MB
Qualifier
MB
Qualifier
RL

0.099
Limits
60-120
79 _ 120
79 _ 123
MDL Unit
mg/Kg
D
Job ID: 440-265252-1
SDG: Yorba Linda, CA
Client Sample ID: TANK-YF-N-5'
Prep Type: Total/NA
D %Rec
%Rec.

Limits
RPD
RPD Limit
97 ~ 6~0--~147'0C:-- ---5 ~
Client Sample ID: Method Blank
Prep Type: Total/NA
Prepared Analyzed Dil Fae
04/29/20 08:40 ---1
Prepared Analyzed Oil Fae
04129120 0B:40 ---1
04129120 0B:40 1
04129120 0BA0
Lab Sample ID: LCS 440-606887/7
Matrix: Solid
Client Sample ID: Lab Control Sample
Analysis Batch: 606887
Analyte
Volatile Fuel Hydrocarbons
(C4-C12)
Surrogate
Dibromofluoromethane (Surr)
4-Bromofluorobenzene (Surr)
Toluene-dB (Surr)
LCS
%Recovery
95 106
105
Lab Sample ID: LCSD 440-606887/8
Matrix: Solid
Analysis Batch: 606887
Analyte
Volatile Fuel Hydrocarbons
(C4-C12)
Surrogate
Dibromofluoromethane (Surr)
4-Bromof/uorobenzene (Surr)
Toluene-dB (Surr)
LCSD
%Recovery
94 104
104
LCS
Qualifier
LCSD
Qualifier
Spike
Added

0.998
Limits
60-120
79-120
79-123
Spike
Added

0.992
Limits
60- 120
79 _ 120
79-123
Prep Type: Total/NA
LCS LCS %Rec.

Result Qualifier Unit D %Rec Limits ---- 0.872 mg/Kg 87 60 - 135 Client Sample ID: Lab Control Sample Dup
Prep Type: Total/NA

LCSD LCSD
Result Qualifier

0.902
Unit
mg/Kg
D %Rec
91 %Rec. RPD
Limits RPD Limit
60- 135 --3 ~
Eurofins Calscience Irvine

El

QC Association Summary
Client: Aptim Environmental & Infrastructure Inc
ProjecVSite: Young Farm UST Removal

GC/MS VOA
Analysis Batch: 606880
Lab Sample ID Client Sample ID Prep Type
440-265252-1 TANK-YF-N-5' Total/NA
440-265252-2 TANK-YF-S-5' Total/NA
MB 440-606880/5 Method Blank Total/NA
LCS 440-606880/6 Lab Control Sample Total/NA
440-265252-1 MS TANK-YF-N-5' Total/NA
440-265252-1 MSD TANK-YF-N-5' Total/NA
Analysis Batch: 606887
Lab Sample ID Client Sample ID Prep Type
440-265252-1 TANK-YF-N-5' Total/NA
440-265252-2 TANK-YF-S-5' Total/NA
MB 440-606887/5 Method Blank Total/NA
LCS 440-606887/7 Lab Control Sample Total/NA
LCSD 440-606887/8 Lab Control Sample Dup Total/NA

Matrix
Solid
Solid
Solid
Solid
Solid
Solid
Matrix
Solid
Solid
Solid
Solid
Solid
Job ID: 440-265252-1
SDG: Yorba Linda, CA
Method Prep Batch
82608
82608
82608
82608
82608
82608
Method Prep Batch
82608/CA_LUFT
MS
82608/CA_LUFT
MS
82608/CA_LUFT
MS
82608/CA_LUFT
MS
82608/CA_LUFT
MS
Eurofins Calscience Irvine
4/30/2020
D

Client: Aptim Environmental & Infrastructure Inc
Project/Site: Young Farm UST Removal
Qualifiers

GC/MS VOA
Qualifier Qualifier Description
Definitions/Glossary
Job ID: 440-265252-1
SDG: Yorba Linda, CA
J
Glossary
Result is less than the RL but greater than or equal to the MDL and the concentration is an approximate value.

Abbreviation
D
%R
CFL
CNF
DER
Oil Fae
DL

DL, RA, RE, IN
DLC
EDL
LOO
LOQ
MDA
MDC
MDL
ML
NC
ND
PQL
QC
RER
RL
RPO
TEF
TEQ
These commonly used abbreviations may or may not be present in this report.

Listed under the "D" column to designate that the result is reported on a dry weight basis Percent Recovery
Contains Free Liquid
Contains No Free Liquid
Duplicate Error Ratio (normalized absolute difference)
Dilution Factor
Detection Limit (DoD/DOE)
Indicates a Dilution, Re-analysis, Re-extraction, or additional Initial metals/anion analysis of the sample Decision Level Concentration (Radiochemistry)
Estimated Detection Limit (Dioxin)
Limit of Detection (DoD/DOE)
Limit of Quantitation (DoD/DOE)
Minimum Detectable Activity (Radiochemistry)
Minimum Detectable Concentration (Radiochemistry)
Method Detection Limit
Minimum Level (Dioxin)
Not Calculated
Not Detected at the reporting limit (or MDL or EDL if shown) Practical Quantitation Limit
Quality Control
Relative Error Ratio (Radiochemistry)
Reporting Limit or Requested Limit (Radiochemistry)
Relative Percent Difference, a measure of the relative difference between two points Toxicity Equivalent Factor (Dioxin)
Toxicity Equivalent Quotient (Dioxin)

Eurofins Calscience Irvine
4/30/2020
IE

Accreditation/Certification Summary
Client: Aptim Environmental & Infrastructure Inc
Project/Site: Young Farm UST Removal
Laboratory: Eurofins Calscience Irvine
Unless otherwise noted, all analytes for this laboratory were covered under each accreditation/certification below.

Authority
California
Program
State
Identification Number
2706
The following analytes are included in this report, but the laboratory is not certified by the governing authority. the agency does not offer certification.

Analysis Method Prep Method Matrix Analyte
8260B Solid Dichlorodifluoromethane

Job ID: 440-265252-1
SDG: Yorba Linda, CA
Expiration Date
06-30-20
This list may include analytes for which
Eurofins Calscience Irvine
4/30/2020
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17461 Derian Avenue
Suite 100
Irvine, CA 92614-5843
phone 949.261 .1022 fax 949.260.3299
Client Contact
APTIM Environmental
420 Exchange Suite 150
Irvine. CA 92602
949-680-5467
l(XXX) xxx-xxxx FAX
Project Name: Young Farm UST Removal
Yorba Linda, CA
PO# 4"02419S-0
Sample Identification
"TAN\:-:: - \Jf-- N .. S'
TAt,i)( ... \/( - S· .S.

Chain of Custody Record
Regulatory Program: C rJW :J NPDES .7 RCRA 7 Other:

Project Manager. David Virginia
Email: dav1d [email protected] Site Contact: D. Virginia Tel/Fu: 949-981-8383 Lab ContAlct: lernt Davldkova
Analysis Turnaround Tim•
I , CALENDAR DAYS L WQRl(JNG DAYS
- TATifdifleronlfromllelow 101:l. z II
.. _J 2weeks -
Z • - g l!l
• ~1 1- >c i i :J 2days i f/1 ,¥
t; ii = ,7 1 day N :a
~ :I ID ... v .... ,. •• 0
Sample Sample I Type Ji ~ 1c-c-p, , of ::c
Date Time o-o .... , Matrix Cont it :. I!: g
4/28/20 ,;I\~ G s 1 X X
4/28/20 I~ G s 1 X X
,.
r .. tArnerica LaboratorlN, Inc. d/bla Eumflna TeatAmerlca coc No:

Date: April 21, 20:ZO of coc.

Carrier: APTIM - Seit TALSProiect#:

Samow: DMV
For Lab Uu Only:

Walk-in Client: I
lab Sampling: I
Job/ SDG No.:

SamDle Soecific Notes:
()
~
~ ~-
~
~ ,.

HIIH!l 1111111 -
-
- 440-265252 Chain of custodY
Pntnrvation Used: 1• lee, 2• HCI; 3a H2S04; 4-HN03; S-NaOH; 8• Othllt' Methanol 1 1 Ponlble Huard Identification: Sample Diapo.al ( A fH may be aaeued if aamplee ant retained longer than t month) Are any samples from a listed EPA Hazardous Wasta? Please List any EPA Waste Codes for the sample in the C<>fT1fll!ID.l:I Section if the lab is to dilloo§e of the sample. ( - Non-Hazar.l I "'•mm"""' .J Skin Irritant LJ Poison 6 u IJnkl1own U R,tum to Client c;;-~ L, "1thlve for Monchs Spec:1a1 inatructlonll/QC Requlrementll & Comments:
3,L.r/3 4 IR89'
Custody Seals Intact: 7 Yes C No Custody Seal No.: Cooler Temp. {"C): Obs'd: Corr'd: Therm ID No.:

Relinquished b~ \} I') \j \ '-6,I tJ l A Company: p.Rrl ~ ~~ime: Received by: Company: Date/Time:

JU7"t>
Relinquished by: Company: Date/Time: Received by: n Company: Date/Time:

Relinqui$hed by: Company: Date/Time: Received in Labo~~/ c~~~tRY ~,l'!Jj~ a /f,l{J - i Fonn No. CA-C-Wl--002, Rev. 4.31 , dated 3/512020

~ Ith

CHAIN OF CUSTODY
County of Orange Health Care Agency
Environmental Health Division
1241 E. Dyer Rd., Ste. 120, Santa Ana, CA 92705
CARE AGENCY Telephone: (714) 433·6000 / FAX: (714) 754-1768

1. ALL SAMPLES ARE TO BE HANDLED AS COURT EVIDENCE, AND ARE TO BE PROPERLY STORED IN A SECURE LOCATION.

2. PLEASE WRITE LEGIBLY.

3. ATTACH THIS FORM TO THE ORIGINAL REPORT OF THE ANALYTICAL RESULTS AND RETURN THEM TO THIS OFACE.

4. 6.

7. LABORATORY RESULTS RECEIVED WITHOUT PROPER CHAIN OF CUSTODY DOCUMENTATION WILL NOT BE ACCEPTED.

TO BE COMPLETED av LABORATORY ANALYST 5. TO BE COMPLETED BY SAMPLE COLLECTOR LAB NO.: SITE NAME/ADDRESS: i '7<) SJ '4:61:
1~--
DATE RECEIVED: ___________ _ l ,: ' " ~~') ¼}urbo. L1V\Ci0 SAMPLE(S) CONDITION (PLEASE CHECK): DATE OF COLLECTION: L/ )zf'/20 p
CHILLED: __ COUNTY SEAL(S) INTACT: _ _
CONTAINER IN GOOD CONDITION:

SAMPLE COLLECTOR/COMPANY: A-:ft1b?)
DATE ANALYSIS COMPLETED: _ ______ _ TELEPHONE NO.: _____ _ _ ___ _ ANALYST: _ _____________ _ HCA REPRESENTATIVE: ~0-i0 !)~( SAMPLE
NUMBER

1. 2.

3. 4.

5. 6.
#2

SIGNATURE

SIGNATURE

SAMPLE DESCRIPTION/COMMENTS

TIME OF

COLLECTION
s. ~ A.'

CHAIN OF CUSTODY
V/AGENCY W\(J_,,(
COMPANYt~GENCY
6c-1Rv

COMPANY/AGENCY

COMPANY/AGENCY

COMPANY/AGENCY

COMPANY/AGENCY
- .

TESmMES
~SrnMES
W.28 /..2 0 If~..:;
INCLUSNe 'DATESmMES
INCLUSIVE OATESmMES
INCLUSIVE DATESmMES
INCLUSIVE OATEsmMES
F272-9.1531 .1 CAWS) 12!1)

WHITE-RETURN THIS COPY TO ENVIRONMENTAL HEALTH, CANARY-LABORATORY COPY PINK-CONTRACTOR/CONS~1~~2
p01?2 fOLDENROD-OFF:CE COPY 4/30/2020

Login Sample Receipt Checklist
Client: Aptim Environmental & Infrastructure Inc
Login Number: 265252
List Number: 1
Creator: Bonta, Lucia F
Question
Radioactivity wasn't checked or is </= background as measured by a survey meter.

The cooler's custody seal, if present, is intact.

Sample custody seals, if present, are intact.

The cooler or samples do not appear to have been compromised or tampered with.

Samples were received on ice.

Cooler Temperature is acceptable.

Cooler Temperature is recorded .

COC is present.

COC is filled out in ink and legible.

COC is filled out with all pertinent information.

Is the Field Sampler's name present on COC?
There are no discrepancies between the containers received and the COC.

Samples are received within Holding Time (excluding tests with immediate HTs)
Sample containers have legible labels.

Containers are not broken or leaking.

Sample collection date/times are provided.

Appropriate sample containers are used.

Sample bottles are completely filled.

Sample Preservation Verified.

There is sufficient vol. for all requested analyses, incl. any requested MS/MSDs
Containers requiring zero headspace have no headspace or bubble is <6mm (1/4").

Multiphasic samples are not present.

Samples do not require splitting or compositing .

Residual Chlorine Checked.

Eurofins Irvine
Answer
True
N/A
NIA
True
True
True
True
True
True
True
True
True
True
True
True
True
True
True
N/A
True
True
True
True
N/A

Comment
Not present
Not Present
Job Number: 440-265252-1
SDG Number: Yorba Linda , CA
List Source: Eurofins Irvine
4/30/2020

~1 , Please print or type Form Approved 0MB No 2050-0039 UNIFORM HAZARDOUS , 1. Generator ID Number
WASTE MANIFEST C A C O 0 3 0 6 4 5 1 0
, 2. Page 1 of , 3. Emergency Response Phone
1 800-424-9300 1•· Mcr2157ug•s 5 8 JJK

5. Generators Name and Mailing Address Att: Steve Young Generator's Sile Address (if different than mailing address) You:NFarms
1908 Yorba Linda Blvd. Yorba Linda CA 92886
Generato(s Phone: Q ,t Q ,: ,:: n C: A t: '7 I
6, Transporter 1 Company Name U.S. EPA ID Number
Environmental Logistics, Inc. ICAR0001 7 2 4 6 0

7. Transporter 2 Company Name U.S. EPA ID Number
I

8. Designated Facility Name and Site Address U.S. EPA ID Number \M>rld OU Recycling
2000 N. Alamedo St.

Compton CA 90222
lcA1 0 8 0 0 1 ~ ~ " ? Facility's Phone: -~ - ~-~ _ ~~~ nl'\ 9a. 9b. U.S. DOT Description (induding Proper Shipping Name, Hazard Class, ID Number, 10. Containers 11 . Total 12. Unit 13. Waste Codes HM and Packing Groop (If any)) No. Type QuanUty WtNol.

1. ~ X UN1993, WASTE Flammable Uqulds, n.o.s.(Gasollne, Benzene) NV\1 nri1a 1-::IA 0 ~ 3.PGII I rr -"loo c:, w
z 2. w
(!) ~

3. 4.

14. Special Handling Instructions and Additional Information 1)(I,E) ERG#128 W0#406703 u~1Lfl

15. GENERATOR'S/OFFEROR'S CERTIFICATION: I hereby declare that the conlenls of this oonsignment are fully and accurately described above by the proper shipping name, ard are classified, packaged, marked and labeled/placarded, and are in au respects In proper oondition for transport acoording lo applicable international and national governmental regulations. If export shipment and I am the Pmiary Exporter, I certify lhal the oontents of this oonsignment oonform to the terms of the attached EPAAcknowtedgment of Consent.

I certify that the waste minimization statement Identified In 40 CFR 262.27(a) (ij I am a large quantity generator) or (b) OIi am a small quantily generalor) is true.

Generato(s/Offerol's Ped/Typed Name \._J \,uAa lnCL'!r.o ~ n11, r,::., "-TC-E;t;;- 1\na~~ R ( 'l l Month Day Year
0A ,,_ . _D \ _;-.e, 11h 14 I ~81 :l...~ ...I 16. lnternatiooal Shipments • Import lo U.S. D Export from U.S . Port of eotry/exJ \ ' iz Transporter signature (for exports only~ Date leaving U.S.:
~ 17. Transporter Acknowledgment of Receipt of Materials /l - ~ Transpn;;;.;;r -Y /VI qfjtl /l) q Signawr/4 // /,. Month Day Year 0 I /I A "V/"L.,f'I n ~ . ..-._ a.. a. -- ,,, I ./, -- - I 9' I l..'i-1 ~c: Cl) --- Transporter 2 Printed/Typed Name ' Signature Month Cay Year ~ I I I I
I 18. Disaepancy
, .... ~ ... ,-- PTT
• ~ I
•Residue D Partial Rejection D FuU Rejection
~~IX)~~P-ed ouantlty 0 with - -o-t-ltt- ·-::annt G,., ' ~-,~II\ YY\·!f,111 ffilStiC,~ _5_-:i!-2--~ ~ 1 Sil. Alternale Fdty (or Generator) \ U.S. EPA ID Numbec/ ::;
u
.1: Facility's Phone: I C 18c. Signature of Alternate Facility (or Generator) I Month I w Day Year z
~ I
C) 19. Hazardous Waste Report Management Method Codes (i.e., oodes for hazard01Js waste treatmen~ disposal, and recycling systems) in w

1. ~\D~G, j2' j3' r C
l ~=3;~-;-~~~:~~~-~r7JM:r··'~ .A. I ,~1d/1i~
EPA Form 8700-22 Rev. l 2-1 7) Previous editions are obsolete. DESIGNATED F ACILITY TO EPA's e-MANl~ESl' gy-STEM

•
SR0140370 7023

HEAL TH CARE AGENCY

ENVIRONMENT AL HEAL TH
1241 EAST DYER ROAD, SUITE 120
SANTA ANA, CA 92705-561 1
(714)433-6000

SERVICE REQUEST - PROGRAM RECORD REQUEST

TANK REMOVAL FORM
UST REMOVAUCLOSURE **W/0 UNIT BASE
512912020
4:30 PM
SERVICE REQUEST I( ,J;i/~
COMPLETION DATE 1 f 1
ASSIGNED TO BOYER, SARA ASSIGNED DATE 1/14/2020

CURRENT ACTIVE TANK INFORMATION

TANKID CONTENTS PRODUCT

LOP SR TANK REMOVAL -
NR

DESCRIPTION

CAPACITY TANK
STATUS

REMOVE TANK

YES DATE
v::: 1 '1\·~'U) I
Ver 1.7

oc "' CHAIN OF CUSTODY
County of Orange Health Care Agency
nealth Environmental Health Division
1241 E. Dyer Rd., Ste. 120, Santa Ana, CA 92705
CARE AGENCY Telephone: (714) 433-6000 / FAX: (714) 754-1768

1. ALL SAMPLES ARE TO BE HANDLED AS COURT EVIDENCE, AND ARE TO BE PROPERLY STORED IN A SECURE LOCATION.

2. PLEASE WRITE LEGIBLY.

3. ATTACH THIS FORM TO THE ORIGINAL REPORT OF THE ANALYTICAL RESULTS AND RETURN THEM TO THIS OFFICE.

LABORATORY RESULTS RECEIVED WITHOUT PROPER CHAIN OF CUSTODY DOCUMENTATION WILL NOT BE ACCEPTED.

4. TO BE COMPLETED BY LABORATORY ANALYST 5. TO BE COMPL~TED BY SAMPLE COLLECTOR . LAB NO.: SITE NAME/ADDRESS:

DATE RECEIVED:

SAMPLE(S) CONDITION (PLEASE CHECK): DATE OF COLLECTION:

CHILLED: _ _ COUNTY SEAL(S) INTACT: _ _ SAMPLE COLLECTOR/COMPANY:

CONTAINER IN GOOD CONDITION: 0
- -
DATE ANALYSIS COMPLETED: TELEPHONE NO.:

ANALYST: HCA REPRESENTATIVE:

6. SAMPLE DETERMINATION TIME OF

NUMBER REQUESTED SAMPLE DESCRIPTION/COMMENTS COLLECTION ' ' • ) I I ,
I 1/._ __) I t· <. ,
.. l ;
4 7. CHAIN OF CUSTODY ab

1. 1 . SIGNATURE COMPANY/AGENCY INCLUSIVE DATES/TIMES

2. ·=,- . SIGNATURE COMPANY/AGENCY 11'.!CLUSIVE DATES/TIMES

3. . •

SIGNATURE COMPANY/AGENCY INCLUSIVE DATES/TIMES

4. . SIGNATURE COMPANY/AGENCY INCLUSIVE DATES/TIMES

5. . SIGNATURE COMPANY/AGENCY INCLUSIVE DATES/TIMES

6. . SIGNATURE COMPANY/AGENCY INCLUSIVE DATES/TIMES
#2 WHITE-RETURN THIS COPY TO ENVIRONMENTAL HEALTH, CANARY-LABORATORY COPY F272-9.1531.1 (R4/05) (@) PINK-CONTRACTOR/CONSUL TANT COPY, GOLDENROD-OFF:CE COPY ~

• I
Orange County Health Care Agency
Environmental Health Division
Underground Tank Removal Form
~ ~(Ny\ Fo VJh
Fa~ ity Namli
PC#______ Tl# _____ _ LUST# ____ _ IR# ___ _
Inspector: SO\!Zc ~~ II' __ Date: if/9-1/ W Time: If&
Cross Street Site Telephone Number
/qi)(! ~ U/}~ /~/c:L
Addr
Telephone Number
Operator (if different than owner)
~l ( Ayb YY\)
Telephone Number
Consultant or Contractor Company Contact Person Telephone Number Tank #1: ;:O~ 5 <..J{;QQ O{Vd !J\LTank #4: ____________ _ Size Const. Mat. ~red Size Const. Mat. Mat. Stored
Tank #2: ______________ Tank #5: ____________ _
Size Const. Mat. Mat. Stored Size Const. Mat. Mat. Stored Tank #3: _____________ _ Tank #6: ____________ _
Size Const. Mat. Mat. Stored Size Const. Mat. Mat. Stored C--J-... 1 Depth to Groundwater: _ ._/\../_ ~ ____ _ Fate of Piping: ___________ _ Proposition 65 Required? _____ _ Prop. 65 Form Submitted on: ______ _ Fire Dept. Personnel On-site: ___./ ------------------------ Ambient Air Readings on Field Instrument: ___________________ _ Other Information: t-aril loot( --0
ti, \ ¥\,..et\,--t d- ~ -V\ILl h h\.t.

Rev:5/5/94 Page 1 of 2 FORMS/UST/1

FIELD ACTIVITY DESCRIPTION
Facility Name
PC# ____ _ Tl# ____ _ LUST# ___ _ IA# ___ _
Inspector: ___________ _ Date: ____ _ Time: ___ _
__ F_ielq Activi!~---------------'-'--------___.--............ =====--- Rev:5/5/94 Page 2of 2 FORMS/UST/1

LEGEND:
- - - Approximate Property Boundary
D Location of 500-ga llon gasoline USTwithin/beneath on site shed (steel) (not to scale)
Aerial Photo from Google Maps, Date: Jan uary 2020
s
I
u
5 T
8 Fill and Vent Piping
0 0
Drums
Misc. Storage
s:
iii' (')
U)
0 w
<O
(l)
UST Removal Plan:

1. Sawcut and remove overlying concrete. Remove
overburden soil surrounding tank. Excavated soil to be
placed within bermed, plastic lined area and covered with plastic (HOPE).

2. Remove fill cap - tank to remain vented at all times until <10% LEL is achieved and maintained

3. Drain existing piping back to tank. If necessary, purge piping using inert gas (nitrogen). Do not purge with
air.

4. Remove residual fuel from tank for legal disposal. Rinse tank until <10% LEL atmosphere is attained.

Ground equipment during purging and rinsing.

5. Inert UST by placing 30 lbs of dry ice per 1000 gallons of tank capacity. Evenly distribute dry ice along tank
bottom. Close all tank openings except for 1/8" diameter ooenino to allow for thermal exoansion.

6. Remove UST from subsurface using heavy equipment.

Triple wash and rinse tank. Legally dispose of tank and rinsate, providing copies of all disposal certificates and waste manifests demonstrating proper disposal.

7. Collect soil samples from each end of tank for analysis in accordance with OCHD requirements: analyze for TRPH,
VOCs (EPA 82608) including Oxygenates. Additional
samples as required by oversight agencies.

8. Backfill tank excavation to existing surface grade elevation with clean soil.

9. Provide client and oversight agencies with UST removal Documentation, including photographic log documenting
removal activities, original laboratory analytical report, waste manifests, and destruction certificates.

Outdoor Storage Shed

APP OVED
GE CO , 1T r HEALTH CARE AGENCY
ENVIr <' ~ F' JT \ L HEALTH DIVISION
HAZARDOUS ,1AT:..: :~ 1,'\LS MA, AGEMENT SECTION
THIS APROVAI I~ ,' i.JD FOR 12 MONTI-IS FROM
THE, t'\PPROVAL DATE
Plan revie" cl' J;,
This approval shali ut . · , ,... , •
Prevent further corr<' ,
Approvaiifan) ad,·: !• • 1,, ~1 , •~ , 1
Is addition to th1 ° Jpr ,
Building departm1·rn .111 t, ~
Underground tani • , ,
scheduled 48 hot.r ,.

A copy of these apJ rn , ·, • ll -
Pan#
, c lat.on of any law, nor does it
.1 •:•, Plans must be resubmitted for
riplicant.
, • ' bv the local fire departmoot
·· .:-t must be obtained.
dre required and must be
I 1 3-6000 for an appoinm1"u1
, .. , "· ... . 1e ~1t e al all t101 .

NI piping associated •1ith underground

UST REMOVAL PLAN
19081 Yorba Linda Blvd.

Yorba Linda, CA 92886
FIGURE 2
storage tanks snail be removed Project# 631012097
L._ _______________________________________ and .,;___,:...._ prope ;y disposed _______ ___._ __________ JA __, 1 4 2020

ENVIRONMENTAL HLTH

LEGEND:
- - - Approximate Property Boundary
D Location of 500-gallon gasoline USTwithin/beneath on site shed (steel) (not to scale)
Aerial Photo from Google Maps, Date: January 2020
s
8 Fill and Vent Piping
u
s
T
0 0
Drums
Misc. Storage
Outdoor Storage Shed
~ CJ)
("')
(f)
0 iil
(C
Cl)
UST Removal Plan:

1. Sawcut and remove overlying concrete. Remove
overburden soil surrounding tank. Excavated soil to be
placed within bermed, plastic lined area and covered with plastic (HOPE).

2. Remove fill cap - tank to remain vented at all times until <10% LEL is achieved and maintained

3. Drain existing piping back to tank. If necessary, purge piping using inert gas (nitrogen). Do not purge with
air.

4. Remove residual fuel from tank for legal disposal. Rinse tank until <10% LEL atmosphere is attained.

Ground equipment during purging and rinsing .

5. Inert UST by placing 30 lbs of dry ice per 1000 gallons of tank capacity. Evenly distribute dry ice along tank
bottom. Close all tank openings except for 1/8" diameter ooenino to allow for thermal expansion.

6. Remove UST from subsurface using heavy equipment.

Triple wash and rinse tank. Legally dispose of tank and rinsate, providing copies of all disposal certificates and waste manifests demonstrating proper disposal.

7. Collect soil samples from each end of tank for analysis in accordance with OCHD requirements: analyze for TRPH,
VOCs (EPA 82608) including Oxygenates. Additional
samples as required by oversight agencies.

8. Backfill tank excavation to existing surface grade elevation with clean soil.

9. Provide client and oversight agencies with UST removal Documentation, including photographic log documenting
removal activities, original laboratory analytical report, waste manifests, and destruction certificates.

UST REMOVAL PLAN
19081 Yorba Linda Blvd.

Yorba Linda, CA 92886
FIGURE 2
Project# 631012097

ENVIRONMENTAL HLTH

teck A License - License Detail -CSLB
Home I Online Services I Li cense Details
OContractor's License Detail for License #
927360
DISC LAI MER: A license status check provides information taken from the CSLB license database. Before relying on this information, you should be aware of the following limitations.
• CSLB complaint disclosure is restricted by law (B&P 7124.6) If this entity is subject to public complaint disclosure, a link for complaint disclosure will appear below. Click on the link or button to obtain complaint and/or legal action information. • Per B&P 7071.17, only construction related civil judgments reported to the CSLB are disclosed. • Arbitrations are not listed unless the contractor fails to comply with the terms of the arbitration. • Due to workload, there may be relevant information that has not yet been entered onto the Board's license database.

This license is current and active.

Business Information

ENVIRONMENTAL LOGISTICS INC
140 MONTE AVENUE
BLOOMINGTON, CA 92316
Business Phone Number:(909) 546-1354
Entity Corporation
ueOat 01/i.~~V
01/3~
---~1,-·ce- nse Status
All information below should be reviewed.

Classifications
• A- GENERAL ENGINEERING CONTRACTOR
• C31 - CONSTRUCTION ZONE TRAFFIC CONTROL
Certifications
• HAZ - HAZARDOUS SUBSTANCES REMOVAL
Bonding Information
p://www.cslb.ca.gov/OnlineServices/CheckLicenseII/LicenseDetail.aspx?LicNum=927360

1/21/20 Page 1214 of 2028
1eck A License - License Detail -CST "R
Bond Number: SC6369710
Bond Amount: $15,000
Effective Date: 01/01/2016
Contractor's Bond History
Bond of Qualifying Individual
Thi s license filed Bond of Qualifying Individual number SC6369711 for TRAVIS LORENZO PEREIRAS in t he amount of $12,500 with AMERICAN CONTRACTORS INDEMNITY COMPANY.

Effective Date: 03/02/2009
BQl 's Bond History
Workers' Compensation
This license has workers compensation insurance with the GREENWICH INSURANCE COMPANY Policy Number:WEC300137902
Effective Date: 10/28/2019
Expire Date: 10/28/2020
Workers' Compensation History
Other
• Personnel listed on this license (current or disassociated) are listed on other licenses.

Back to Top Conditions of Use Privacy Policy Accessibility Accessibility Certification Copyright © 2020 State of California
:p://www.cslb.ca.gov/0nlineServices/CheckLicenseI1/LicenseDetail.aspx?LicNum=927360

1/21/20

01 02
03 04
05 06
07 08
09 10
11 12
13 14
ORANGE COUNTY HEALTH -~· .E AGENCY

ENVIRONMENTAL HEALTH DIVISION

HEALTH SERVICE ORDER
403964
CEQ/HSF (Acct/Bat# $ ____ _
CEQ Plan Check/Foods (PC# $ ____ _
CEQ Plan Check/Pools (PC# $ ____ _
Food Vehicles Cat $ ____ _
Decal No(s)
CEO/Court Restitution/Judgment $ ____ _
Name
Case#
Hotels/Motels (Acct/Bat# $ ____ _
Massage Parlor (Acct/Bat# $ ____ _
Noise $ ____ _
Liquid Waste Hauler $ ____ _
Farm Labor Camp Registration $ ____ _
Aboveground Petroleum Storage Act $ ____ _
Hazardous Waste (Acct/Bat# $ ____ _
Hazardous Waste Fines $ ____ _
Hazardous Waste Restitution/Judgment $ ____ _
Name
Case#
15 Hazardous Waste Clean-up ____ _ $ ____ _
16 Medical Waste/Body Art _ ____ _ $. ____ _
17 UST/HSF (Acct/Bat# __ ......,.. ______ _
.@_ UST Plan Check (PC# J D~3 ~ ~357=-
19 UST State Surcharge $ ____ _
20 UST Restitution/Judgment $ ____ _
Name ___ ________ _
Case# ___________ _
21 Wells (Const _ _ Recon __ Destr __ ) $ ____ _
Water __ Cath __ lnit. Monit. ___ ·)
Add. Monit. #Wells ____ _
Driller _ _________ _
Consultant _________ _
22 Backffow/Cross Connection ____ _ $ ____ _
Client(s) __________ _
23 Small Water Systems $ ____ _
24 CUPA- Base Fee $ ____ _
25 CUPA - CalArp $ ____ _
26 FOG- OC Sanitation District $ ____ _
27 lierred Permitting $ ____ _
OTHER $ ____ _
OTHER $ ___ _
OTHER l-J ~ ·$ L--- OTHER
PAID BY CHECK NO: ·'-=- M_.__(,._.~,~ ·3~J""'-:..2 t
~
357 .

RECE;IVED HCA
JAN 14 2020

ENVIRONMENTAL HLTH
---
I

lECEIVED HCA
TANK INFORMATION JAN 14 2020
PROVIDE THE INFORMATION BELON FOR ALL TANKS AND PIPING SYSTEMS TO BE INSTALLED, REMOVED OR REPAIRED. ALSO INDICATE THE UPGRADE/CHANGES TO BE MADE TO EACH TANK SYSTEM.

ENVIRONMENT AL H L TH
TANKI.D. #1 #2 #3 #4

CURRENTLY
MATERIAL \ I

OR PROPOSED
MATERIAL WASTE STORED \ I
STORED PREVIOUSLY Gasoline \ I
FUEL TYPE, I.E., UNLEADED \ I

TYPE (TANK, SUMP, OTHERS)
Tank \ I

DOUBLE WALUSINGLE WALL
Single \ I
UL NUMBER \ I

YEAR INSTALLED
1962 \ I

C VAULTED/NOT VAULTED
No Vault \ I
0 MANUFACTURER \ I

N I CAPACITY (GALLONS) I
500 I

T I PRIMARY CONSTRUCTION MATERIAL
Steel \ I
A THICKNESS (UNITS) \ I
I INTERIOR LINING Tar \ I
N MANUFACTURER \ I

E I CAPACITY (GALLONS)
SECONDARY y
R I CONSTRUCTION MATERIAL /\
THICKNESS (UNITS) I \
CORROSION PROTECTION I \
TYPE OF LEAK DETECTION FOR USTs (LIQUID,
PROBE, ETC.) I \

MANUFACTURER OF LEAK DETECTOR I
LOCATION Above (UNDER/ABOVE GROUND) I \
p SUCTION/PRESSURE
Gravity GRAVITY/UNKNONN I \

I CONSTRUCTION I I
PRIMARY MATERIAL Steel \
p MANUFACTURER I \

I CONSTRUCTION
SECONDARY MATERIAL I \
N MANUFACTURER I \

G TYPE OF LEAK DETECTION FOR PIPING
(PRESSURE LOSS DEVICE, ETC.) I \
MANUFACTURER OF LEAK DETECTOR I \
OVERFILL PROTECTION (TYPE) I \
SPILL CONTAINMENT (TYPE) I \
1/08 INFO BULLETINS/UST/86 Distlibution: White - OC CUPA Pink - Data Entry F042-09.1322

STATE OF CALIFORNIA BUSINESS, TRANSPORTATION AND HOUSING AGENCY

DEPARTMENT OF MOTOR VEHICLES
MOTOR CARRIER SERVICES BRANCH MS GB75
P.O. BOX 932370 Sacramento, CA. 94232-3700
(916) 657-8153
10/08/2008

E VIRONMENT AL LOGISTICS INC
140 W MO TE AVE
BLOOMINGTON, CA 92316

RECEIVED HCA
JAN t 4 2020
• ENVIRONMENTAL HLTH
NON-EXPIRING DON17WJnO,IIOJUIWHC1£S
Ilia MOTOR CARRIER PERMIT A Public Service Agency
Combined Carrier
DEPARTMENT OF MOTOR VEHICLES Valid 12/01 /2008 I Valid IN E .. From: Through: on- xp1nng Motor Carrier Services Branch
P.O. BOX 932370 Sacramento, CA. 94232-3700 CA#: 0340844 The carrier named on this permit is subject to
the Unified Carrier Registration Act (UCRA)
of 2005, and is granted a non-expiring permit
ENVIRONMENT AL LOGISTICS INC of the following classification:
140 W MONTE AVE
BLOOMINGTON, CA 92316
Corporation
Pml Dale: N' • . ·~ Office#: 154 Not Valid fo; Intrastate Only Operations Account #: 470 132 Tech ID: #II
Sequence#; #NNN Amt Paid: No Fee
!!!IMPORTANT REMINDERS!!!
I . This non-expiring Motor Carrier Permit (MCP) will remain valid as long as you continue to conduct interstate operations. The Unified Carrier Registration Act (UCRA) of2005 exempts combined carriers (carriers who operate both intra and interstate) from MCP requirements.

2. Federal Motor Carrier Safety Administration insurance requirements must be maintained.

3. lfyou commence intrastate only operations, you must renew your MCP.

California Relay Telephone Service for the deaf or hearing impaired from TDD Phones: 1-800-735-2929; from Voice Phones: 1-800-735-2922
OMV 2200 MCP (NEW 10/2007) A Public Setvice Agency
Effective 1/1 /20 16

UNITED STATES OF AMERICA

DEPARTMENT OF TRANSPORTATION

PIPELI E AND HAZARDOUS MATERIALS SAFETY ADMI ISTRA TIONRECEIVED HCA

HAZARDOUS MATERIALS

CERTIFICATE OF REGISTRATION
JAN 14 2020
FOR REGISTRATION YEAR(S) 2019-2022 ENVIRONMENTAL HL H
Registrant: ENVIRONMENT AL LOGISTICS INC
ATTN: Wade Riddering
140 W MONTE A VENUE
BLOOMINGTON, CA 923 16
This certifies that the registrant is registered with the U.S. Department of Transportation as required by 49 CFR Part 107, Subpart G.

This certificate is issued under the authority of 49 U .S.C. 5 108. It is unlawful to alter or falsify this document.

Reg. No: 06251955024280 Effective: July 1, 2019
HM Company ID: 94991
Expires: June 30, 2022
Record Keeping Requirements for the Registration Program The following must be maintained at the principal place of business for a period of three years from the date of issuance of this Certificate of Registration:
(1) A copy of the registration statement fi led with PHMSA; and (2) This Certificate of Registration
Each person subject to the registration requirement must furnish that person's Certificate of Registration (or a copy) and all other records and information pertaining to the information contained in the registration statement to an authorized representative or special agent of the U. S. Department of Transportation upon request.

Each motor carrier (private or for-hire) and each vessel operator subject to the registration requirement must keep a copy of the current Certificate of Registration or another document bearing the registration number identified as the "U.S. DOT Hazmat Reg. No." in each truck and truck tractor or vessel (trailers and semi-trailers not included) used to transport hazardous materials subject to the registration requirement. The Certificate of Registration or document bearing the registration number must be made avai lable, upon request, to enforcement personnel.

For information, contact the Hazardous Materials Registration Manager, PHH-52, Pipeline and Hazardous Materials Safety Administration, U.S. Department of Transportation, 1200 ew Jersey Avenue, SE, Washington, DC 20590, telephone (202) 366-4109.

Effective 7/ 1/20 19

RECEIVED HCA Pa e 5
STATE OF CALIFORNIA CONT~ NIJMBER L:CENSE NUMBER
DEPARTMENT OF CALIFORNIA HIGHWAY PATR 241630 137235

HAZARDOUS MATERIALS
TRANSPORTATION ltMs@NMEN1 ;;_._ riLT

CHP CARR ER NUMBER
CA 340844

LOCATION
860
CHP 360H (REV. 1/00) OPI 062 PROPERTY OF THE CALIFORNIA HIGHWAY PATROL (CHP) Tho origf1181 valld llceftso mtr.ll be kCIX a111:w> nccmsee·• ploce al oo-.a as tndlalled on lhe lioen11C 1----------------------------------i•nd a legible copy musl be carried In ony vold<lo or comblnotlon lransportlng hazoldous ma1e,lal• and musl. l>o p,05001ed to any CHP offlc:<!r upon roquesl This licenso Is NON-TRANSFERABLE. and must bo sumindered "' \ho CHP upon domtnd 0< as required by law. A ma10t1ty ""8nge In ownorsl11p or conttol of Iha licensed actlvlly 5INIII roqulre • new llcoow. This lic:en .. may be renewed by submitting en appficallon an<I appropriate foo to the CHP. Por,ons whosa llc:enses have uplrod o, ero oth<l<Wlse no longer volld must immoolau:ty c:easo lhe ac:1Mty ,equlrfng a llc:onse. THERE IS NO GRACE PERIOD. For licensing lnformaUon contact CHP, Commercial Vehicle Section at {916) 843-3400.

LICENSEE NAME AND PHYSICAL STATION ADDRESS (if different than below)

ENVIRONMENTAL LOGISTICS INC
140 W MONTE AVE
BLOOMINGTON CA, US 92316

LICENSEE NAME AND MAILING ADDRESS
Attention: Wade Rlddering

ENVIRONMENTAL LOGISTICS INC
140 W MONTE AVE
BLOOMINGTON CA, US 92316
This carrier is on the special routing/sate stopping place maiNng lists as indicated below:
8 •
(HMX) Explosives subfe<t to Division 14, Callfornta Vehicle Code (CVC). (HMPH) Polson lnhalatlon Hazard materials In bulk packages subJect to Division

14.3, eve.
(HMRCQ) Highway Route Controlled Quantity radioactive materials subject to Division 14.5, CVC.

Any person who dumps, spins, or causes the release of hazardous materials Of hazardous waste upon any highway shall immediately notify the CHP or the agency having jurisdiction for that highway.

The minimum fine for failure to make the appropriate nolificetion is $2,000 00. (CVC Section 23112.5} •
• •
Effective 0 I /0 l /2020

RECE!Vi;;v r"ICA
JAN 14 2020

ENVIRONMENTAL HLTH
Jared Blumenfeld
Secretary for
Environmental Protection
Department of Toxic Substances Control
Meredith Williams, Ph.D.

Acting Director
1001 "I" Street
P.O. Box 806
Sacramento, California 95812-0806
***HAZARDOUS WASTE TRANSPORTER REGISTRATION***

WITH CONSOLIDATED TRANSPORTER NOTIFICATION
NAME AND ADDRESS OF REGISTERED TRANSPORTER:

ENVIRONMENTAL LOGISTICS INC
140 W. MONTE AVENUE
BLOOMINGTON, CA 92316
TRANSPORTER REGISTRATION NO: 5508
EXPIRATION DATE: DECEMBER 31 , 2020
Gavin Newsom
Governor

THIS IS TO CERTIFY THAT THE FIRM NAMED ABOVE IS DULY REGISTERED TO

TRANSPORT HAZARDOUS WASTE IN THE STATE OF CALIFORNIA IN ACCORDANCE WITH THE PROVISIONS OF CHAPTER 6.5, DIVISION 20 OF THE HEAL TH AND SAFETY CODE AND TITLE 22 OF THE CALIFORNIA CODE OF REGULATIONS, DIVISION 4.5.

THIS REGISTRATION CERTIFICATE MUST BE CARRIED WITH EACH SHIPMENT OF HAZARDOUS WASTE.

FOR REGISTRATION INFORMATION, PLEASE CALL (916) 440-7145.

December 5, 2019
(DATE)
Effective 12/05/2019

RECEIVED IPage 6.1
JAN 14 2020
Stale of Cahfornia - California Environmenlal Proleclion Agency Department of Toxic Substances Ccmircil ENVIRONMENTAi HI TH Transportation Uni!
Mo'!ttal Center Drive, Sacramento, CA 95826
Phone (916) 440-7145 Fax (916) 255-6436

CONSOLIDATED TRANSPORTER NOTIFICATION
1 Business Name (Show d.b.a. name, show name exactly as it will appear on regis1ration; same name or trademark is required on al l vehicles):

2. Transporter Registration Number
Environmental Logistics, lnc. 5 5 0 8
3 Business Address Number/Street City County/Province State/Country Zip/Postal Code 140 W. Mon ie Avenue Bloomin ton San Bernardino CA 92316

4. Mailing Address (If different) P.O. Box/Street City County/Province State/Country Zip/Postal Code -SAMESa Telephone Number
( 909) 546-1354
(Ext. Number) 6. Identification Numbers. If your company transports hazardous wastes, operates the designated facility, and intends to submit only the facility copy of the consolidated manifests pursuant to Health and Safety Code Section 25160(b)(5)(A), you must provide all the transporter and facility identification numbers (12 characters) used by your company on these manifests. If necessary, list additional identification numbers on a se arate sheet.

Sb Fax Number
909 546- 1546 CA R000 172460 CAR0002 l 75 I 3
5c E-mail Address
wridd erin @usahazmat.com
7 I intend to transport the following hazardous wastestream under the consolidated manifesting procedure, as described in Health and Safety Code, Section 25160.2. [Check all applicable box(es)):

X A. Used oil
XB
XC
Contents of an 011/water separator
Solids contaminated with used oil
X D. Brake fluid
X E. Antifreeze
X F Antifreeze sludge
x G. Parts cleaning solvents, including aqueous cleaning solvents x H. Hydroxide sludge contaminated solely with metals from a wastewa1er ireatment process
"Paint-related" wastes, including paints, thinners. filters , and sludges X J Spent photographic solutions
x K. Dry cleaning solvents (including perchloroethylene, naphtha, and silicone based solvents)
XL. Filters, lint, and sludges contaminated with dry cleaning solvent x M. Asbestos and asbestos-containing materials
X N. Inks from the printing industry
X 0 . Chemicals and laboratory packs collected from K-12 schools X P, Absorbents contaminated with other wastes hsted ,n Health and Safety Code Section 25160.2(c)
x a. Filters from dispensing pumps for diesel and gasoline fuels

8. Name and Title of Authorized Representative (print or typeJ;_ W_ a_d_e_ R_i_d_d_e_1_·i_n_g .... ~R~b_ ...e..,~ .. ~----------------- 10/26/2019 Date
Note: Keep this Consolidated Tran orter Notification, signed by DTSC, with the valid Transporter Registration Certificate in the vehicle at all times during the transportation of hazardous waste. Transportation of wastestream(s) listed above, under the consolidated manifesting procedure, without notifying DTSC is a violation of Health and Safety Code (HSC) Section 25165(a), and may be subject to significant penalties. Consolidated transporters ·are also re uired to submit uarterl re orts ursuant to HSC Section 25160.2 d .

DO NOT WRITE BELOW THIS LINE FOR DTSC USE ONLY
Received date
11 DTSC
DTSC 1299 7/09
Effective 12/05/20 I 09

• USGS - U.\. DEPAATMENT Of THE IKTIRIOlt
U.S. GCOlOOCM. SURVCY
* Site Location
- I = = =~- = - - w ~
-------- ____ ,.. ___ ,.
·------·---
-- ---- ---- -- ·-- o-- o- -
) , APTIM
UST Removal Plan
FIGURE ~~ RvHCA Project #631012097
JAN 14 2020 Page 1223 of 2028
• USGS - U.S. DEPARTMENT OF THE INTEJttOa
u.s.aot.O<i1CM.WRV£T
* Site Location
- I = - ft - - - ffl =. - -
·-·----·--· ------·---- -----·
- -- ---- ---- -- •-- o-- o--
) , APTIM
usT Rffi!~o HCA
FIGURE 1 SITE VICINITY
Project #631012097
ENVIRONMENTAi 1-11 T~

• USGS -
~ .. .,=::--~-=-_,
:=..::..-=-====- u.--0:--_ 5
- -----=- --:..:~ ~
* Site Location
= = m =-= m = = = ~
_____ ..
·-·-------~ --------·
%
·~-
=~-=-
·----
- -- ---- ---- -- •-- o-- o--
UST Removal Plan
Fl~¥~ ~~ Project #631012097
JAN 14 2020
--u~---• 1• A -l\l...,.. J\I I IJ "T'"LJ

• USGS - U.S. OEPAltTMEMT Of THE tmJtDl
u.S.CLOlO(;ICM.SUR\lt't'
~.,=::=:;:-:.,__
=l-~·--=--====- ..... --0::--_ =
- .... ~---=- - ----~ ~
* Site Location
\CAl.fl:UOOO
'T ::, = -- - .., = = :r
·------·- ----------- -----· -·
--~---- ---- -- •-- o-- o--
UST Removal Plan
FIG ¥~cl~ Project #631012097
JAN 14 2020
~ 1\1\ /Tnl"'\l\ th Ar-'!\l"T"J\ I I II Tl I

Phase II Environmental Site
Assessment
19081 Yorba Linda Boulevard
Yorba Linda, California 92886
July 7, 2022
Stantec Project Number: 185805577
Prepared for:

City Ventures
3121 Michelson Drive, Suite 150
Irvine, California 92612
Prepared by:

Stantec Consulting Services, Inc.
735 East Carnegie Drive, Suite 280
San Bernardino, California 92408

PHASE II ENVIRONMENTAL SITE ASSESSMENT

1.1 This document entitled Phase II Environmental Site Assessment was prepared by Stantec Consulting Services Inc. (“Stantec”) for the account of City Ventures (the “Client”). Any reliance on this document by any third party is strictly prohibited. The material in it reflects Stantec’s professional judgment in light of the scope, schedule and other limitations stated in the document and in the contract between Stantec and the Client. The opinions in the document are based on conditions and information existing at the time the document was published and do not take into account any subsequent changes. In preparing the document, Stantec did not verify information supplied to it by others. Any use which a third party makes of this document is the responsibility of such third party. Such third party agrees that Stantec shall not be responsible for costs or damages of any kind, if any, suffered by it or any other third party as a result of decisions made or actions taken based on this document.

Prepared by
(signature)
Alicia Jansen
Senior Scientist
Reviewed by
(signature)
Jim DeWoody
Principal Scientist
Approved by
(signature)
Kyle Emerson, CEG
Managing Principal Geologist

PHASE II ENVIRONMENTAL SITE ASSESSMENT

1.1 Table of Contents
EXECUTIVE SUMMARY .........................................................................................................1.2

1.0 INTRODUCTION..........................................................................................................1.1

1.1 PROPERTY DESCRIPTION AND LAND USE .............................................................1.1

1.2 PROPERTY GEOLOGY...............................................................................................1.1

1.3 PROPERTY HYDROGEOLOGY ..................................................................................1.2

2.0 BACKGROUND...........................................................................................................2.1

3.0 FIELD INVESTIGATION ..............................................................................................3.2

3.1 PRE-DRILLING ACTIVITIES........................................................................................3.2

3.2 INVESTIGATION..........................................................................................................3.2

3.2.1 Soil Boring and Sampling Procedures .........................................................3.3

3.2.2 Soil Vapor Probe Installation .......................................................................3.3

3.2.3 Soil Vapor Sampling....................................................................................3.4

3.2.4 Field Equipment Cleaning Procedures ........................................................3.4

3.2.5 Quality Control Sampling.............................................................................3.4

4.0 LABORATORY TESTING............................................................................................4.1

5.0 INVESTIGATION RESULTS........................................................................................5.1

5.1 FIELD OBSERVATIONS..............................................................................................5.1

5.2 ANALYTICAL RESULTS ..............................................................................................5.1

5.2.1 Soil Vapor Results.......................................................................................5.2

6.0 CONCLUSIONS AND RECOMMENDATIONS ............................................................6.3

7.0 LIMITATIONS ..............................................................................................................7.4

8.0 REFERENCES.............................................................................................................8.1

LIST OF TABLES
Table 1 – Summary of Soil Analytical Results – TPH, VOCs, Arsenic, Lead, and OCPs Table 2 – Summary of Soil Vapor Analytical Results

LIST OF FIGURES
Figure 1 – Property Location Map
Figure 2 – Boring Locations

LIST OF APPENDICES
Appendix A – Laboratory Data Sheets

PHASE II ENVIRONMENTAL SITE ASSESSMENT

1.2 Executive Summary
On behalf of City Ventures, Stantec Consulting Services Inc. (Stantec) has prepared this Phase II Environmental Site Assessment (ESA) report for the property located at 19081 Yorba Linda Boulevard, in the City of Yorba Linda, County of Orange, California 92886 (the Property; Figure 1). The investigation was performed based on the scope of work set forth in Stantec’s proposal entitled Revised Proposal for Phase II Environmental Site Assessment, dated April 12, 2022, and in accordance with the Master Services agreement between the Client and Stantec (the “MSA”). In the event of any conflict between this document and the MSA, the MSA will prevail. City Ventures (the “User”) has been designated as the User of this report.

The Subject Property consists of approximately 2.74 acres of land developed with a small orchard with orange, avocado, and dragonfruit trees and three residential structures and support buildings (i.e. garage and storage sheds). Adjoining properties, as well as the nearby area, generally include residential properties and a park. The following recognized environmental conditions (RECs) were identified during the Phase I ESA completed in April 2022, which essentially stated as follows:
• Former UST. The Subject Property formerly contained a 500-gallon gasoline UST, multiple hazardous waste containers, and contaminated soil that were removed in 2020. Shallow soil sampling was also performed at that time; contaminants were not reported above residential screening levels. However, soil vapor sampling was not conducted at the Subject Property. This represents a potential vapor encroachment condition (VEC) and is considered a REC for the Subject Property. It was recommended that a Phase II ESA be conducted to evaluate soil vapor conditions in the vicinity of the features highlighted above. • Historical Agricultural Use. The majority of the Subject Property is utilized as an orange, avocado, and dragon fruit orchard; and the Subject Property has been agricultural in use since at least the 1930s. Application of pesticides and herbicides is considered likely to have occurred during this time period, potentially resulting in the accumulation of pesticides and metals (lead and arsenic) commonly associated with herbicide application in shallow soils at the Subject Property. Therefore, the former and current agricultural activity on the Subject Property is considered a REC. Stantec recommended performing a shallow soil investigation on the Subject Property to sample and analyze soil for the presence of pesticides and the heavy metals that typically accompany herbicide application (i.e., arsenic and lead).

To investigate the RECs identified during the Phase I ESA, Stantec completed a Phase II ESA at the Subject Property on June 24 and 27, 2022, which included the following:
• A total of ten soil boring were drilled and soil samples (HA-1 through HA-10) were collected at 1.0 and

3.0 feet bgs for potential analysis of organochlorine pesticides (OCPs) by EPA Method 8081A, and heavy metals (arsenic and lead) by EPA Method 6010B. The 1-foot samples were submitted for

PHASE II ENVIRONMENTAL SITE ASSESSMENT

1.3 analysis and the deeper soil samples (3-feet bgs) collected were placed on hold pending the analytical results of the shallow soil samples.
• A total of ten soil borings were drilled and soil samples (HA-1 through HA-10) were collected throughout the historical agricultural area where smudge pots were likely utilized. Soil samples were collected at

1.0 and 3.0 feet bgs for analysis of total petroleum hydrocarbons (TPH) by EPA Method 8015 and TPH as gasoline range organics (TPH-GRO) by EPA Method 8260B. • Two soil borings (SV-1 and SV-2) were advanced to 10.5-feet bgs in the vicinity of the former 500- gallon UST. Soil vapor probes were installed at the 5-ft and 10-ft bgs intervals at each soil boring.

According to the Property Owner, three cesspools (approximately 5-feet diameter and 30-feet deep with weep lines) are located in the northern portion of the Subject Property. These cesspools were for residential sewage disposal and are not considered an environmental concern. However, these cesspools will need to be abandoned during site development activities.

Laboratory analytical test results from this assessment are attached as Appendix A. A summary of the analytical data from this assessment is provided in Table 1 and Table 2. The laboratory test results from this phase of investigation are discussed below and soil vapor results were compared to the more conservative value between the DTSC HERO Note 3 screening level for commercial sites (DTSC, 2020), and the USEPA RSLs for residential sites (USEPA, 2021), using both an AF of 0.03 and AF of 0.001. All soil boring locations and soil vapor data from this assessment is summarized on Figure 2.

Soil Results
Historical Agricultural Use
Only one of the ten soil samples (HA-9-1) had minor detections of 4,4’-DDE and 4,4’-DDT at 0.137 and

0.0384 milligrams per kilogram (mg/kg) respectively. These concentrations are well below their respective residential screening levels of 1.80 and 1.90 mg/kg, respectively. No other OCPs reported above the laboratory reporting limits in any of the other soil samples collected and submitted for analysis.

Lead was reported in all ten soil samples at concentrations ranging from 2.1 to 9.3 mg/kg. The reported lead concentrations were all below the residential screening level of 80 mg/kg (Table 1).

There were no detections of arsenic or TPH reported above the laboratory reporting detection limit (i.e., the results were “non-detect”) in any soil samples analyzed.

Therefore, the historical agricultural use of the Subject Property does not represent a REC and no further assessment or action is recommended.

Former UST
There were no detections of TPH-GRO or VOCs above their corresponding laboratory reporting limits, with the exception of two minor detections of chloroform at 80 and 40 micrograms per cubic meter (ug/m3) in

PHASE II ENVIRONMENTAL SITE ASSESSMENT

1.4 SV-1-5 and SV-2-5, respectively (Table 3). Based, on the results of the soil vapor assessment the former UST does not represent a REC or vapor intrusion concern and no further assessment or action is recommended.

Conclusions and Recommendations
Based on the results of this investigation, no impacts were identified related to the agricultural use of the Subject Property or former UST. Therefore, based on the subsurface investigation results and the Phase I ESA as it pertains to other environmental conditions at the Property, the agricultural use and the former UST do not represent a RECs to the Property, and there are no other RECs associated with the Property, and Stantec recommends no further action or investigation regarding the environmental condition of the Property.

PHASE II ENVIRONMENTAL SITE ASSESSMENT
Introduction

1.1 1.0 INTRODUCTION
On behalf of City Ventures, Stantec Consulting Services Inc. (Stantec) has prepared this Phase II Environmental Site Assessment (ESA) report for the property located at 19081 Yorba Linda Boulevard, in the City of Yorba Linda, County of Orange, California 92886 (the Property; Figure 1). The investigation was performed based on the scope of work set forth in Stantec’s proposal entitled Revised Proposal for Phase II Environmental Site Assessment, dated April 12, 2022 and in accordance with the Master Services agreement between the Client and Stantec (the “MSA”). In the event of any conflict between this document and the MSA, the MSA will prevail. City Ventures (the “User”) has been designated as the User of this report.

1.1 PROPERTY DESCRIPTION AND LAND USE
The Subject Property consists of approximately 2.74 acres of land developed with a small orchard with orange, avocado, and dragonfruit trees and three residential structures and support buildings (i.e. garage and storage sheds). Adjoining properties, as well as the nearby area, generally include residential properties and a park. A Property location map is illustrated on Figure 1. A Property map illustrating the main features of the Property is provided as Figure 2.

1.2 PROPERTY GEOLOGY
The Property is located within the Coastal Plain of Orange County groundwater basin (8-001). The basin is bound to the north by consolidated rocks of the Puente and Chino Hills, to the east by the Santa Ana Mountains, to the south by the San Joaquin Hills, and to the southwest by the Pacific Ocean. The basin underlies a coastal alluvial plain and the lower Santa Ana River watershed (Coastal Plain of Orange County Groundwater Basin (ca.gov)).

The United States Department of Agriculture – Natural Resources Conservation Service (USDA-NRCS), Web Soil Survey identifies the soils beneath the Subject Property as Yorba gravelly sandy loam with 2-9 percent slopes, consisting of well drained, very high runoff soils, with a typical soil profile comprised of gravelly sandy loam (0-11 inches), very gravelly sandy clay loam (11-40 inches), and very gravelly sandy loam (40-63 inches), and a parent material of sandy and gravelly alluvium derived from mixed material (USDA, 2022).

According to California Department of Conservation’s (DOC) Earthquake Zone Map (Department of Conservation Map Server (ca.gov), the Subject Property is not located within an Alquist-Priolo (AP) Earthquake Fault Zone boundary. The closest fault zone is located approximately two miles to the north of the Subject Property.

PHASE II ENVIRONMENTAL SITE ASSESSMENT
Introduction

1.2 1.3 PROPERTY HYDROGEOLOGY
The Property is located within the Coastal Plain of Orange County groundwater basin (8-001). The basin underlies a coastal alluvial plain and the lower Santa Ana River watershed. The basin is comprised of a deep depression containing fresh water bearing marine and continental sand, silt, and clay, with finer material increasing toward the coast. The majority of surface water recharge occurs within coarser deposits. Sediments that hold fresh water occur to approximately 2,000 feet bgs. Upper, middle, and lower aquifers are present below this level. Basin recharge occurs through Santa Ana River percolation, precipitation, and well injection. Historically, groundwater flow was toward the ocean in the southwest portion of the basin, but pumping caused water levels to fall below sea level inland from the NewportInglewood fault zone. This trough subsequently allowed for ocean water to contaminate groundwater. As a result, injection wells have been placed within the Alamitos and Talbert Gaps (erosional channels) that allow injected water to help protect the basin from seawater (Coastal Plain of Orange County Groundwater Basin (ca.gov).

Site specific groundwater investigations were not conducted during this ESA; however, according to a 2000 site closure report for a nearby site approximately 1,700 feet southwest of the Subject Property, groundwater was measured to be approximately 47-70 feet below ground surface (bgs) with a flow direction to the southwest (County of Orange, 2000).

PHASE II ENVIRONMENTAL SITE ASSESSMENT
Background

2.1 2.0 BACKGROUND
The following recognized environmental conditions (RECs) were identified during the Phase I ESA completed in April 2022, which essentially stated as follows:
• Former UST. The Subject Property formerly contained a 500-gallon gasoline UST, multiple hazardous waste containers, and contaminated soil that were removed in 2020. Shallow soil sampling was also performed at that time; contaminants were not reported above residential screening levels. However, soil vapor sampling was not conducted at the Subject Property. This represents a potential vapor encroachment condition (VEC) and is considered a REC for the Subject Property. It was recommended that a Phase II ESA be conducted to evaluate soil vapor conditions in the vicinity of the features highlighted above. • Historical Agricultural Use. The majority of the Subject Property is utilized as an orange, avocado, and dragon fruit orchard; and the Subject Property has been agricultural in use since at least the 1930s. Application of pesticides and herbicides is considered likely to have occurred during this time period, potentially resulting in the accumulation of pesticides and metals (lead and arsenic) commonly associated with herbicide application in shallow soils at the Subject Property. Therefore, the former and current agricultural activity on the Subject Property is considered a REC. Stantec recommended performing a shallow soil investigation on the Subject Property to sample and analyze soil for the presence of pesticides and the heavy metals that typically accompany herbicide application (i.e., arsenic and lead).

To investigate the RECs, Stantec completed a Phase II investigation at the Property. The results of that investigation are presented in the following sections of this report.

PHASE II ENVIRONMENTAL SITE ASSESSMENT
Field Investigation

3.2 3.0 FIELD INVESTIGATION
Prior to the commencement of fieldwork activities, Stantec made the following preparations.

3.1 PRE-DRILLING ACTIVITIES
• Stantec visited the Property to mark the proposed boring locations. Subsequent to the marking, Underground Service Alert (USA) was notified at least 72-hours prior to the commencement of drilling activities; and,
• In accordance with federal Occupational Safety and Health Administration (OSHA) regulations (29 CFR, Section 1910.120), Stantec generated a site-specific Health and Safety Plan (HASP) for the Property. All Stantec personnel and subcontractors associated with the project were required to be familiar with and comply with all provisions of the HASP.

3.2 INVESTIGATION
To address the RECs listed above, Stantec completed a Phase II ESA in June 2022. Each of the identified RECs were assessed with soil borings and soil vapor samples.

Stantec provided the services of a field geologist to supervise and direct the advancement of multiple soil, soil vapor, and groundwater borings at the Property. All work was conducted under the direct oversight of a State of California professional and included the following:
• A total of ten soil borings were drilled and soil samples (HA-1 through HA-10) were collected at 1.0 and

3.0 feet bgs for potential analysis of organochlorine pesticides (OCPs) by EPA Method 8081A, and heavy metals (arsenic and lead) by EPA Method 6010B. The 1-foot samples were submitted for analysis and the deeper soil samples (3-feet bgs) collected were placed on hold pending the analytical results of the shallow soil samples.
• A total of ten soil borings were drilled and soil samples (HA-1 through HA-10) were collected throughout the agricultural area where smudge pots were likely utilized. Soil samples were collected at 1.0 and

3.0 feet bgs for analysis of total petroleum hydrocarbons (TPH) by EPA Method 8015 and TPH as gasoline range organics (TPH-GRO) by EPA Method 8260B.
• Two soil borings (SV-1 and SV-2) were advanced to 10.5-feet bgs in the vicinity of the former 500- gallon UST. Soil vapor probes were installed at the 5-ft and 10-ft bgs intervals at each soil boring.

PHASE II ENVIRONMENTAL SITE ASSESSMENT
Field Investigation

3.3 3.2.1 Soil Boring and Sampling Procedures
Prior to mechanical hand auger was used for utility clearance purposes to a depth of five (5) feet bgs. Soil samples collected within the upper five (5) feet were collected by discharging the hand auger contents directly into pre-cleaned laboratory-provided eight-ounce glass jars with Teflon®-lined lids. Once the fivefoot depth has been reached, advancement of borings was performed using a Geoprobe direct push rig.

During advancement, sampling of subsurface soils was performed starting at a depth of approximately five (5) feet bgs. All of the direct push borings were advanced and sampled using a Geoprobe 6620DT rig equipped with 4-foot-long by 1.25-inch inner-diameter sampler with acetate sample liners to the terminal depth of the borehole.

At each sampling interval, the sampler was driven into undisturbed soil using a hydraulic ram on the Geoprobe rig. Upon advancement of the sampler through the desired sampling depth interval, the sample liner was retrieved from the boring. The drilling and sampling sequences was then repeated for the entire depth of the boring.

The soils from each of the direct push borings were visually examined by Stantec field personnel who classified the soils in accordance with the Unified Soil Classification System (USCS). A photo-ionization detector (PID) was used to monitor/field screen the soils collected. Field screening for VOCs was achieved by removing the soil from the uppermost sample sleeve and placing it in a zip-lock type baggie. A PID probe was inserted into the baggie to monitor the headspace for VOC vapors.

Following classification and VOC vapor evaluation, the soil samples were carefully packaged for chemical analysis by sealing the ends of the acetate liner with Teflon ® sheeting, covering with plastic end caps, and sealing with non-VOC containing tape. All sample containers were labeled with the appropriate identification information (boring number, sample depth, sample collection date, and sample collection time).

3.2.2 Soil Vapor Probe Installation
At the completion of drilling to target depth, five soil borings were converted to soil vapor monitoring probes.

Borings SV-1 and SV-2 were completed with soil vapor probes at the 5 and 10 feet bgs interval. Subsurface soil vapor probe installation was performed in accordance with the July 2015 DTSC “Advisory - Active Soil Gas Investigations” (DTSC Advisory).

Each sample probe was constructed with a 1-inch-long Airstone sampling screen set at the prescribed sampling intervals. Each of the sampling screens was constructed with a permeable Airstone vapor tip connected to ¼-inch outer diameter Nylaflow tubing that was lowered to the bottom of the borehole and backfilled with filter sand, until approximately 6-inches of filter pack was placed. A transition seal consisting of approximately 6-inches of dry bentonite was then placed above the filter pack, followed by an annular seal consisting of hydrated bentonite. At the surface, the exposed nylon tubing was capped with tight fitting plastic endcaps and labeled to indicate sampling depth.

PHASE II ENVIRONMENTAL SITE ASSESSMENT
Field Investigation

3.4 3.2.3 Soil Vapor Sampling
Soil vapor samples were collected on June 27, 2022, in accordance with the methods and procedures outlined by the DTSC Advisory, a minimum of 48-hours after installation in order to allow for equilibration.

Prior to sampling, a shut-in test was conducted on the sampling train to ensure all connections and fittings were airtight. The shut-in test was performed on the sampling train by applying a vacuum of 100 inches of water to the sampling train and monitoring magnehelic gauges for a pressure drop for one minute. If loss of vacuum was observed, the fittings were adjusted as needed until no vacuum loss was observed during subsequent shut-in tests.

After the sampling equipment passed the shut-in test, the probes were purged using glass syringes to remove internal air from the sample train (calculated from the internal volume of the tubing and probe tip); the void space of the sand pack around the probe tip; and the void space of the dry bentonite (in the annular space). Three internal volumes were purged from each sampling location at a rate less than 200 milliliters per minute (ml/min).

Immediately following purging the internal volumes, the soil vapor samples were collected by the laboratory technician by connecting a glass syringe to the sampling port with Teflon® or Nylaflow® tubing. A tracer compound of Isopropanol (IPA) was placed above the surface seal and along the sampling train to evaluate the integrity of the seal. No tracer compound was detected in any other soil vapor samples collected during this investigation. One soil vapor sample was collected from each soil vapor probe, and one replicate sample was collected from location SV-2 at the 5-ft bgs interval.

3.2.4 Field Equipment Cleaning Procedures
To maintain quality control during drilling operations, all drill rods and reusable soil sampling equipment was decontaminated using a triple bucket rinse. Prior to drilling at a given location or sampling interval, all equipment coming in direct contact with soil samples was scrubbed with an Alconox scrub solution followed by a clean tap water rinse and then a final distilled water rinse. The disposable acetate soil sample liners were used for one sampling interval and then discarded.

3.2.5 Quality Control Sampling
A single (1) replicate soil vapor sample was collected during this investigation. The sample was logged on a chain-of-custody form and delivered to a state certified laboratory for analysis consistent with other primary samples collected during the continued investigation.

PHASE II ENVIRONMENTAL SITE ASSESSMENT
Laboratory Testing

4.1 4.0 LABORATORY TESTING
All chemical analysis was performed at State of California Certified Laboratories. Collected soil samples were analyzed at Jones Environmental, Inc. (Jones) located in Santa Fe Springs, California. Soil gas samples were analyzed by A&R Laboratories using an on-Site mobile laboratory. All samples were managed under strict chain-of-custody. The results are discussed below and presented on Table 1 and Table 2. Complete laboratory reports, including QA/QC documentation is included in Appendix A.

PHASE II ENVIRONMENTAL SITE ASSESSMENT
Investigation Results

5.1 5.0 INVESTIGATION RESULTS

5.1 FIELD OBSERVATIONS
On June 24, 2022, Stantec personnel oversaw the advancement of 10 soil borings at the Property (HA-1 through HA-10) to 3-ft bgs and two borings (SV-1 and SV-10) to 10.5-ft bgs. Soils encountered during this round of assessment consisted of silty sand to clayey sands. No staining or odor was observed in any of the borings advanced during this assessment. All boring locations are depicted on Figure 2.

According to the Property Owner, three cesspools (approximately 5-feet diameter and 30-feet deep with weep lines) are located in the northern portion of the Subject Property.

5.2 ANALYTICAL RESULTS
Laboratory analytical test results from this assessment are attached as Appendix A. A summary of the analytical data from this assessment is provided in Table 1 and Table 2. The laboratory test results from this phase of investigation are discussed below and soil vapor results were compared to the more conservative value between the DTSC HERO Note 3 screening level for commercial sites (DTSC, 2020), and the USEPA RSLs for commercial sites (USEPA, 2021), using both an attenuation factor (AF) of 0.03 and AF of 0.001. All soil boring locations and soil vapor data from this assessment is summarized on Figure

2. Soil Results
Historical Agricultural Use
Only one of the ten soil samples (HA-9-1) had minor detections of 4,4’-DDE and 4,4’-DDT at 0.137 and

0.0384 milligrams per kilogram (mg/kg) respectively. These concentrations are well below their respective residential screening levels of 1.80 and 1.90 mg/kg, respectively. No other OCPs reported above the laboratory reporting limits in any of the other soil samples collected and submitted for analysis.

Lead was reported in all ten soil samples at concentrations ranging from 2.1 to 9.3 mg/kg. The reported lead concentrations were all below the residential screening level of 80 mg/kg (Table 1).

There were no detections of arsenic or TPH reported above the laboratory reporting detection limit (i.e., the results were “non-detect”) in any soil samples analyzed.

Therefore, the historical agricultural use of the Subject Property does not represent a REC and no further assessment or action is recommended.

PHASE II ENVIRONMENTAL SITE ASSESSMENT
Investigation Results

5.2 Former UST
There were no detections of TPH-GRO or VOCs above their corresponding laboratory reporting limits, with the exception of two minor detections of chloroform at 80 and 40 micrograms per cubic meter (ug/m3) in SV-1-5 and SV-2-5, respectively (Table 3). Based, on the results of the soil vapor assessment the former UST does not represent a REC and no further assessment or action is recommended.

5.2.1 Soil Vapor Results
There were no detections of TPH-GRO or VOCs above their corresponding laboratory reporting limits with the exception of one minor detection of toluene at 20 micrograms per cubic meter (ug/m3). This detection is well below the residential screening level of 10,333 ug/m3 when applying an attenuation factor of 0.03, which is not an official attenuation factor but which is sometimes consulted for guidance (Table 3).

5.2.1.1 Quality Control Results
The leak check compound Isopropanol was not detected in any of the soil vapor samples.

PHASE II ENVIRONMENTAL SITE ASSESSMENT
Conclusions and Recommendations

6.3 6.0 CONCLUSIONS AND RECOMMENDATIONS
Based on the results of this investigation, no impacts were identified related to the agricultural use of the Subject Property or former UST. Therefore, based on the subsurface investigation results and the Phase I ESA as it pertains to other environmental conditions at the Property, the agricultural use and the former UST do not represent a RECs to the Property, and there are no other RECs associated with the Property, and Stantec recommends no further action or investigation regarding the environmental condition of the Property.
.

PHASE II ENVIRONMENTAL SITE ASSESSMENT
Limitations

7.4 7.0 LIMITATIONS
The conclusions presented in this report are professional opinions based on data described in this report.

The opinions of this report have been arrived at in accordance with currently accepted hydrogeologic and engineering standards and practices applicable to this location and are subject to the following inherent limitations. Stantec makes no other warranty, either expressed or implied, concerning the conclusions and professional advice that is contained within the body of this report.

Inherent in most projects performed in a heterogeneous subsurface environment, continuing excavation and assessments may reveal findings that are different than those presented herein. This facet of the environmental profession should be considered when formulating professional opinions on the limited data collected on these projects.

This report has been issued with the clear understanding that it is the responsibility of the owner, or their representative, to make appropriate notifications to regulatory agencies. It is specifically not the responsibility of Stantec to conduct appropriate notifications as specified by current County and State regulations.

The information presented in this report is valid as of the date our exploration was performed. Site conditions may degrade with time; consequently, the findings presented herein are subject to change.

PHASE II ENVIRONMENTAL SITE ASSESSMENT
References

8.1 8.0 REFERENCES
Department of Toxic Substances and Control, Human and Ecological Risk Office (HERO), Human Health Risk Assessment (HHRA) Note Number: 3, DTSC-modified Screening Levels (DTSC-SLs), dated June 2020.

Stantec Consulting Services Inc., 2022, Phase I Environmental Site Assessment, dated April 20.

State Water Resource Control Board’s Geotracker, 2022, website https://geotracker.waterboards.ca.gov/ United States Geological Survey (USGS), 2012, Orange Quadrangle, 7.5 Minute Topographic Map, Scale 1 inch = 2,000 feet
United Stated Environmental Protection Agency, 2019, Regional Screening Level (RSL) Summary Table (TR=1E-06, HQ=1), dated April.

PHASE II ENVIRONMENTAL SITE ASSESSMENT
TABLES

Table 1
Summary of Soil Analytical - TPH, Arsenic and Lead, OCPs 19081 Yorba Linda Boulevard, Yorba Linda, California
Project No.: 185805577
GRO DRO ORO Arsenic Lead 4,4'-DDD 4,4'-DDE 4,4'-DDT alphaChlordane gammaChlordane
(2C)
Chlordane
(2C) Various
430 260 5,100 0.067 82 2.7 1.80 1.90 0.48 0.48 0.48 Various NE NE NE 0.41 80 1.9 23 37 NE NE NE Various
NE NE NE 0.6 - 11.0 12.4 - 97.1 NE NE NE NE NE NE Various HA-1-1 1 6/24/2022 <0.20 <10.0 <10.0 <5.0 6.3 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <various HA-2-1 1 6/24/2022 <0.20 <10.0 <10.0 <5.0 2.1 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <various HA-3-1 1 6/24/2022 <0.20 <10.0 <10.0 <5.0 2.6 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <various HA-4-1 1 6/24/2022 <0.20 <10.0 <10.0 <5.0 2.5 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <various HA-5-1 1 6/24/2022 <0.20 <10.0 <10.0 <5.0 3.9 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <various HA-6-1 1 6/24/2022 <0.20 <10.0 <10.0 <5.0 3.5 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <various HA-7-1 1 6/24/2022 <0.20 <10.0 <10.0 <5.0 3.5 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <various HA-8-1 1 6/24/2022 <0.20 <10.0 <10.0 <5.0 7.7 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <various HA-9-1 1 6/24/2022 <0.20 <10.0 <10.0 <5.0 9.3 <0.010 0.137 0.0384 <0.010 <0.010 <0.010 <various HA-10-1 1 6/24/2022 <0.20 <10.0 <10.0 <5.0 3.5 <0.010 <0.010 <0.010 <0.010 <0.010 <0.010 <various Notes:

All concentrations reported in milligrams per kilogram (mg/kg).

DRO - Diesel Range Organics ORO - Oil Range Organics
DTSC - Department of Toxic Substance Control RSL - Regional Screening Level HERO HHRA - Human and Ecological Risk Office Human Health Risk Assessment NA - Not Analyzed
NE - Not Established TPH - Total Petroleum Hydrocarbons OCPs - Organochlorine Pesticides USEPA - United States Environmental Protection Agency BOLD Denotes analyte was detected above the laboratory reporting limit < - Denotes analyte was not detected above the laboratory reporting limit Yellow shading indicates value above the residential screening level but within naturally occurring background levels.

OCPs by 8081A
Sample ID
Sample
Depth
(feet)
Sample Date
TPH by 8015 Arsenic and Lead by
6010B
SFRWQCB ESLs
(Residential) -
San Francisco Bay Regional Water Quality Control Board Environmental Screening Levels (January 2019)
SFRWQCB ESLs (Residential)
DTSC HERO Note 3 (Residential)
Naturally Occuring California
Background Levels

TABLE 2
Summary of Soil Vapor Detections
19081 Yorba Linda Boulevard, Yorba Linda, California
Project No.: 185805577
20,000 3.2 15 16 10,333 3,333 NE various
600,000 97 460 480 310,000 100,000 NE various
SV-1-5 5 3 6/27/2022 <650 <3.1 <6.5 <6.5 <6.5 <13.0 80 <various SV-1-10 10 3 6/27/2022 <650 <3.1 <6.5 <6.5 <6.5 <13.0 <6.5 <various SV-2-5 5 3 6/27/2022 <650 <3.1 <6.5 <6.5 <6.5 <13.0 40 <various SV-2-5-DUP 5 3 6/27/2022 <650 <3.1 <6.5 <6.5 <6.5 <13.0 40 <various SV-2-10 10 3 6/27/2022 <650 <3.1 <6.5 <6.5 <6.5 <13.0 <6.5 <various Notes:

All concentrations reprted in microgramper cubic meter (µg/m3) (1) - Sample analyzed by on-site lab.
(2) -
(3) -
"<" - Results reported below Laboratory Reporting Limit.

NA - Not Analyzed
CA EPA - California Environmental Protection Agency
DTSC - Department of Toxic Substance Control
EPA - United States Environmental Protection Agency
HERO - Human and Ecological Risk Office
LCC - Leak Check Compound (Isopropanol) or 1,1-difluoroethane PCE - Tetrachloroethene
VOCs - Volatile Organic Compounds
Residential Screening Level for Soil Vapor using RSL or HERO NOTE 3 and Attenuation Factor of 0.03 (2) (3)
Toluene
Former UST
PCE
Boring Location Sample ID
Sample
Depth
Below
Ground
Surface
(feet)
Sample
Volume(1)
Sample
Date
Benzene
Xylenes
Chloroform
Other VOCs

TPH-GRO
TCE
More conservative screening level between USEPA Region 9 RSL (November, 2021) and DTSC HERO Note 3 (June, 2020); San Francisco Bay Regional Water Quality Control Board ESLs (January 2019) used for TPH screening with AF of 0.03.

Most conservative screening level between USEPA Region 9 RSL (November, 2021) and DTSC HERO Note 3 (June, 2020); San Francisco Bay Regional Water Quality Control Board ESLs (January 2019) with AF of 0.001.

Residential Screening Level for Soil Vapor using RSL or HERO NOTE 3 and Attenuation Factor of 0.001 (2) (3)

PHASE II ENVIRONMENTAL SITE ASSESSMENT

FIGURES

SV-2-5/10
SV-1-5/10
HA-1 HA-2 HA-3 HA-4 HA-5 HA-6 HA-7 HA-8 HA-9 HA-10 APPROXIMATE LOCATION OF CESSPOOL BORING LOCATIONS

PHASE II ENVIRONMENTAL SITE ASSESSMENT

APPENDIX A

LABORATORY DATA SHEETS

909-781-6335
1650 S. GROVE AVE., SUITE C
ONTARIO, CA 91761
CHEMISTRY · MICROBIOLOGY · FOOD SAFETY · MOBILE LABORATORIES FOOD · COSMETICS · WATER · SOIL · SOIL VAPOR · WASTES
A & R Laboratories, Inc.
www.arlaboratories.com [email protected]

CASE NARRATIVE
Authorized Signature Name / Title (print) Ken Zheng, President Signature / Date Ken Zheng, President
06/28/2022 12:49:01 Laboratory Job No. (Certificate of Analysis No.) 2206-00212 Project Name / No. 19081 Yorba Linda Blvd., Yorba Linda, CA 92886 185805577
Dates Sampled (from/to) 06/27/22 To 06/27/22
Dates Received (from/to) 06/27/22 To 06/27/22
Dates Reported (from/to) 06/28/22 To 6/28/2022
Chains of Custody Received Yes
Comments:

Subcontracting
Organic Analyses
No analyses sub-contracted
Other Analyses
No analyses sub-contracted
Sample Condition(s)
All samples intact
The data and information on this, and other accompanying documents, represent only the sample(s) analyzed and is rendered upon condition that it is not to be reproduced, wholly or in part, for advertising or other purposes without approval from the laboratory.

USDA-EPA-NIOSH Testing Food Sanitation Consulting Chemical and Microbiological Analyses and Research Page 1252 of 2028 909-781-6335
1650 S. GROVE AVE., SUITE C
ONTARIO, CA 91761
CHEMISTRY · MICROBIOLOGY · FOOD SAFETY · MOBILE LABORATORIES FOOD · COSMETICS · WATER · SOIL · SOIL VAPOR · WASTES
A & R Laboratories, Inc.
www.arlaboratories.com [email protected]

CERTIFICATE OF ANALYSIS
Date Reported
Date Received
Invoice No.

Cust #
Permit Number
Customer P.O.
95301
1003
185805577
2206-00212
Project: 19081 Yorba Linda Blvd., Yorba Linda, CA 92886 Analysis Result Method Date
06/28/22
06/27/22
MDL RL Units Result MDL RL Units DFQual Tech
STANTEC CONSULTING SVCS., INC.

ALICIA JANSEN
735 E. CARNEGIE DR., STE. 280
SAN BERNARDINO, CA 92408
Sample: 001 SV-1-5 Date & Time Sampled: 06/27/22 9:32 @ Sample Matrix: Air
Purge Volume Sampled: 3
[TPH Gasoline by GCMS ]
C4-C12 <0.6500 0.65 1.3 µg/L 650.0 1,300 µg/m3 0.13 LUFT GCMS 06/27/22 IG [VOCs by GCMS]
Acetone <0.0650 0.065 0.13 µg/L <65.0 65.0 130 µg/m3 0.13 EPA 8260B 06/27/22 IG t-Amyl Methyl Ether (TAME) <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG Benzene <0.0031 0.00312 0.013 µg/L <3.1 3.1 13 µg/m3 0.13 EPA 8260B 06/27/22 IG Bromobenzene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG Bromochloromethane <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG Bromodichloromethane <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG Bromoform <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG Bromomethane <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG t-Butanol (TBA) <0.0650 0.065 0.13 µg/L <65.0 65.0 130 µg/m3 0.13 EPA 8260B 06/27/22 IG 2-Butanone (MEK) <0.0650 0.065 0.13 µg/L <65.0 65.0 130 µg/m3 0.13 EPA 8260B 06/27/22 IG n-Butylbenzene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG sec-Butylbenzene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG tert-Butylbenzene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG Carbon Disulfide <0.0650 0.065 0.13 µg/L <65.0 65.0 130 µg/m3 0.13 EPA 8260B 06/27/22 IG Carbon Tetrachloride <0.0033 0.00325 0.0065 µg/L <3.3 3.3 7 µg/m3 0.13 EPA 8260B 06/27/22 IG Chlorobenzene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG Chloroethane <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG Chloroform 0.080 0.0065 0.013 µg/L 80 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG Chloromethane <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG 2-Chlorotoluene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG 4-Chlorotoluene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG Dibromochloromethane <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG 1,2-Dibromoethane (EDB) <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG 1,2-Dibromo-3-Chloropropane <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG Dibromomethane <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG 1,2-Dichlorobenzene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG 1,3-Dichlorobenzene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG The data and information on this, and other accompanying documents, represent only the sample(s) analyzed and is rendered upon condition that it is not to be reproduced, wholly or in part, for advertising or other purposes without approval from the laboratory.

USDA-EPA-NIOSH Testing Food Sanitation Consulting Chemical and Microbiological Analyses and Research Page 1253 of 2028 909-781-6335
1650 S. GROVE AVE., SUITE C
ONTARIO, CA 91761
CHEMISTRY · MICROBIOLOGY · FOOD SAFETY · MOBILE LABORATORIES FOOD · COSMETICS · WATER · SOIL · SOIL VAPOR · WASTES
A & R Laboratories, Inc.
www.arlaboratories.com [email protected]

CERTIFICATE OF ANALYSIS
Date Reported
Date Received
Invoice No.

Cust #
Permit Number
Customer P.O.
95301
1003
185805577
2206-00212
Project: 19081 Yorba Linda Blvd., Yorba Linda, CA 92886 Analysis Result Method Date
06/28/22
06/27/22
MDL RL Units Result MDL RL Units DFQual Tech
STANTEC CONSULTING SVCS., INC.

ALICIA JANSEN
735 E. CARNEGIE DR., STE. 280
SAN BERNARDINO, CA 92408
Sample: 001 SV-1-5 Date & Time Sampled: 06/27/22 9:32 @ Sample Matrix: Air
Purge Volume Sampled: 3
.....continued
1,4-Dichlorobenzene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG Dichlorodifluoromethane <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG 1,1-Dichloroethane <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG 1,2-Dichloroethane <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG 1,1-Dichloroethene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG cis-1,2-Dichloroethene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG trans-1,2-Dichloroethene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG 1,2-Dichloropropane <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG 1,3-Dichloropropane <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG 2,2-Dichloropropane <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG 1,1-Dichloropropene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG cis-1,3-Dichloropropene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG trans-1,3-Dichloropropene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG Diisopropyl Ether (DiPE) <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG Ethylbenzene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG Ethyl-t-Butyl Ether (EtBE) <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG Hexachlorobutadiene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG 2-Hexanone <0.0650 0.065 0.13 µg/L <65.0 65.0 130 µg/m3 0.13 EPA 8260B 06/27/22 IG Isopropylbenzene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG 4-Isopropyltoluene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG Methylene Chloride <0.0065 0.0065 0.01 µg/L <6.5 6.5 10 µg/m3 0.13 EPA 8260B 06/27/22 IG 4-Methyl-2-Pentanone (MIBK) <0.0650 0.065 0.13 µg/L <65.0 65.0 130 µg/m3 0.13 EPA 8260B 06/27/22 IG Methyl-t-butyl Ether (MtBE) <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG Naphthalene <0.0027 0.00273 0.0065 µg/L <2.7 2.7 7 µg/m3 0.13 EPA 8260B 06/27/22 IG n-Propylbenzene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG Styrene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG 1,1,1,2-Tetrachloroethane <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG 1,1,2,2-Tetrachloroethane <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG Tetrachloroethene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG Toluene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG The data and information on this, and other accompanying documents, represent only the sample(s) analyzed and is rendered upon condition that it is not to be reproduced, wholly or in part, for advertising or other purposes without approval from the laboratory.

USDA-EPA-NIOSH Testing Food Sanitation Consulting Chemical and Microbiological Analyses and Research Page 1254 of 2028 909-781-6335
1650 S. GROVE AVE., SUITE C
ONTARIO, CA 91761
CHEMISTRY · MICROBIOLOGY · FOOD SAFETY · MOBILE LABORATORIES FOOD · COSMETICS · WATER · SOIL · SOIL VAPOR · WASTES
A & R Laboratories, Inc.
www.arlaboratories.com [email protected]

CERTIFICATE OF ANALYSIS
Date Reported
Date Received
Invoice No.

Cust #
Permit Number
Customer P.O.
95301
1003
185805577
2206-00212
Project: 19081 Yorba Linda Blvd., Yorba Linda, CA 92886 Analysis Result Method Date
06/28/22
06/27/22
MDL RL Units Result MDL RL Units DFQual Tech
STANTEC CONSULTING SVCS., INC.

ALICIA JANSEN
735 E. CARNEGIE DR., STE. 280
SAN BERNARDINO, CA 92408
Sample: 001 SV-1-5 Date & Time Sampled: 06/27/22 9:32 @ Sample Matrix: Air
Purge Volume Sampled: 3
.....continued
1,2,3-Trichlorobenzene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG 1,2,4-Trichlorobenzene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG 1,1,1-Trichloroethane <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG 1,1,2-Trichloroethane <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG Trichloroethene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG 1,2,3-Trichloropropane <0.0026 0.0026 0.013 µg/L <2.6 2.6 13 µg/m3 0.13 EPA 8260B 06/27/22 IG Trichlorofluoromethane <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG Trichlorotrifluoroethane <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG 1,2,4-Trimethylbenzene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG 1,3,5-Trimethylbenzene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG Vinyl Chloride <0.0003 0.000312 0.0065 µg/L <0.3 0.3 7 µg/m3 0.13 EPA 8260B 06/27/22 IG m,p-Xylenes <0.0130 0.013 0.026 µg/L <13.0 13.0 26 µg/m3 0.13 EPA 8260B 06/27/22 IG o-Xylene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG [VOC Vapor Sampling Tracer]
Isopropanol (IPA) <0.0650 0.065 0.13 µg/L <65.0 65.0 130 µg/m3 0.13 EPA 8260B 06/27/22 IG [VOC Surrogates]
Dibromofluoromethane 96 70-130 %REC EPA 8260B 06/27/22 IG Toluene-D8 108 70-130 %REC EPA 8260B 06/27/22 IG
Bromofluorobenzene 103 70-130 %REC EPA 8260B 06/27/22 IG Sample: 002 SV-1-10 Date & Time Sampled: 06/27/22 10:00 @ Sample Matrix: Air
Purge Volume Sampled: 3
[TPH Gasoline by GCMS ]
C4-C12 <0.6500 0.65 1.3 µg/L 650.0 1,300 µg/m3 0.13 LUFT GCMS 06/27/22 IG [VOCs by GCMS]
Acetone <0.0650 0.065 0.13 µg/L <65.0 65.0 130 µg/m3 0.13 EPA 8260B 06/27/22 IG t-Amyl Methyl Ether (TAME) <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG Benzene <0.0031 0.00312 0.013 µg/L <3.1 3.1 13 µg/m3 0.13 EPA 8260B 06/27/22 IG Bromobenzene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG The data and information on this, and other accompanying documents, represent only the sample(s) analyzed and is rendered upon condition that it is not to be reproduced, wholly or in part, for advertising or other purposes without approval from the laboratory.

USDA-EPA-NIOSH Testing Food Sanitation Consulting Chemical and Microbiological Analyses and Research Page 1255 of 2028 909-781-6335
1650 S. GROVE AVE., SUITE C
ONTARIO, CA 91761
CHEMISTRY · MICROBIOLOGY · FOOD SAFETY · MOBILE LABORATORIES FOOD · COSMETICS · WATER · SOIL · SOIL VAPOR · WASTES
A & R Laboratories, Inc.
www.arlaboratories.com [email protected]

CERTIFICATE OF ANALYSIS
Date Reported
Date Received
Invoice No.

Cust #
Permit Number
Customer P.O.
95301
1003
185805577
2206-00212
Project: 19081 Yorba Linda Blvd., Yorba Linda, CA 92886 Analysis Result Method Date
06/28/22
06/27/22
MDL RL Units Result MDL RL Units DFQual Tech
STANTEC CONSULTING SVCS., INC.

ALICIA JANSEN
735 E. CARNEGIE DR., STE. 280
SAN BERNARDINO, CA 92408
Sample: 002 SV-1-10 Date & Time Sampled: 06/27/22 10:00 @ Sample Matrix: Air
Purge Volume Sampled: 3
.....continued
Bromochloromethane <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG Bromodichloromethane <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG Bromoform <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG Bromomethane <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG t-Butanol (TBA) <0.0650 0.065 0.13 µg/L <65.0 65.0 130 µg/m3 0.13 EPA 8260B 06/27/22 IG 2-Butanone (MEK) <0.0650 0.065 0.13 µg/L <65.0 65.0 130 µg/m3 0.13 EPA 8260B 06/27/22 IG n-Butylbenzene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG sec-Butylbenzene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG tert-Butylbenzene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG Carbon Disulfide <0.0650 0.065 0.13 µg/L <65.0 65.0 130 µg/m3 0.13 EPA 8260B 06/27/22 IG Carbon Tetrachloride <0.0033 0.00325 0.0065 µg/L <3.3 3.3 7 µg/m3 0.13 EPA 8260B 06/27/22 IG Chlorobenzene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG Chloroethane <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG Chloroform <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG Chloromethane <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG 2-Chlorotoluene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG 4-Chlorotoluene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG Dibromochloromethane <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG 1,2-Dibromoethane (EDB) <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG 1,2-Dibromo-3-Chloropropane <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG Dibromomethane <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG 1,2-Dichlorobenzene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG 1,3-Dichlorobenzene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG 1,4-Dichlorobenzene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG Dichlorodifluoromethane <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG 1,1-Dichloroethane <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG 1,2-Dichloroethane <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG 1,1-Dichloroethene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG cis-1,2-Dichloroethene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG trans-1,2-Dichloroethene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG The data and information on this, and other accompanying documents, represent only the sample(s) analyzed and is rendered upon condition that it is not to be reproduced, wholly or in part, for advertising or other purposes without approval from the laboratory.

USDA-EPA-NIOSH Testing Food Sanitation Consulting Chemical and Microbiological Analyses and Research Page 1256 of 2028 909-781-6335
1650 S. GROVE AVE., SUITE C
ONTARIO, CA 91761
CHEMISTRY · MICROBIOLOGY · FOOD SAFETY · MOBILE LABORATORIES FOOD · COSMETICS · WATER · SOIL · SOIL VAPOR · WASTES
A & R Laboratories, Inc.
www.arlaboratories.com [email protected]

CERTIFICATE OF ANALYSIS
Date Reported
Date Received
Invoice No.

Cust #
Permit Number
Customer P.O.
95301
1003
185805577
2206-00212
Project: 19081 Yorba Linda Blvd., Yorba Linda, CA 92886 Analysis Result Method Date
06/28/22
06/27/22
MDL RL Units Result MDL RL Units DFQual Tech
STANTEC CONSULTING SVCS., INC.

ALICIA JANSEN
735 E. CARNEGIE DR., STE. 280
SAN BERNARDINO, CA 92408
Sample: 002 SV-1-10 Date & Time Sampled: 06/27/22 10:00 @ Sample Matrix: Air
Purge Volume Sampled: 3
.....continued
1,2-Dichloropropane <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG 1,3-Dichloropropane <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG 2,2-Dichloropropane <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG 1,1-Dichloropropene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG cis-1,3-Dichloropropene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG trans-1,3-Dichloropropene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG Diisopropyl Ether (DiPE) <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG Ethylbenzene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG Ethyl-t-Butyl Ether (EtBE) <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG Hexachlorobutadiene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG 2-Hexanone <0.0650 0.065 0.13 µg/L <65.0 65.0 130 µg/m3 0.13 EPA 8260B 06/27/22 IG Isopropylbenzene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG 4-Isopropyltoluene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG Methylene Chloride <0.0065 0.0065 0.01 µg/L <6.5 6.5 10 µg/m3 0.13 EPA 8260B 06/27/22 IG 4-Methyl-2-Pentanone (MIBK) <0.0650 0.065 0.13 µg/L <65.0 65.0 130 µg/m3 0.13 EPA 8260B 06/27/22 IG Methyl-t-butyl Ether (MtBE) <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG Naphthalene <0.0027 0.00273 0.0065 µg/L <2.7 2.7 7 µg/m3 0.13 EPA 8260B 06/27/22 IG n-Propylbenzene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG Styrene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG 1,1,1,2-Tetrachloroethane <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG 1,1,2,2-Tetrachloroethane <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG Tetrachloroethene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG Toluene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG 1,2,3-Trichlorobenzene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG 1,2,4-Trichlorobenzene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG 1,1,1-Trichloroethane <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG 1,1,2-Trichloroethane <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG Trichloroethene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG 1,2,3-Trichloropropane <0.0026 0.0026 0.013 µg/L <2.6 2.6 13 µg/m3 0.13 EPA 8260B 06/27/22 IG Trichlorofluoromethane <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG The data and information on this, and other accompanying documents, represent only the sample(s) analyzed and is rendered upon condition that it is not to be reproduced, wholly or in part, for advertising or other purposes without approval from the laboratory.

USDA-EPA-NIOSH Testing Food Sanitation Consulting Chemical and Microbiological Analyses and Research Page 1257 of 2028 909-781-6335
1650 S. GROVE AVE., SUITE C
ONTARIO, CA 91761
CHEMISTRY · MICROBIOLOGY · FOOD SAFETY · MOBILE LABORATORIES FOOD · COSMETICS · WATER · SOIL · SOIL VAPOR · WASTES
A & R Laboratories, Inc.
www.arlaboratories.com [email protected]

CERTIFICATE OF ANALYSIS
Date Reported
Date Received
Invoice No.

Cust #
Permit Number
Customer P.O.
95301
1003
185805577
2206-00212
Project: 19081 Yorba Linda Blvd., Yorba Linda, CA 92886 Analysis Result Method Date
06/28/22
06/27/22
MDL RL Units Result MDL RL Units DFQual Tech
STANTEC CONSULTING SVCS., INC.

ALICIA JANSEN
735 E. CARNEGIE DR., STE. 280
SAN BERNARDINO, CA 92408
Sample: 002 SV-1-10 Date & Time Sampled: 06/27/22 10:00 @ Sample Matrix: Air
Purge Volume Sampled: 3
.....continued
Trichlorotrifluoroethane <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG 1,2,4-Trimethylbenzene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG 1,3,5-Trimethylbenzene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG Vinyl Chloride <0.0003 0.000312 0.0065 µg/L <0.3 0.3 7 µg/m3 0.13 EPA 8260B 06/27/22 IG m,p-Xylenes <0.0130 0.013 0.026 µg/L <13.0 13.0 26 µg/m3 0.13 EPA 8260B 06/27/22 IG o-Xylene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG [VOC Vapor Sampling Tracer]
Isopropanol (IPA) <0.0650 0.065 0.13 µg/L <65.0 65.0 130 µg/m3 0.13 EPA 8260B 06/27/22 IG [VOC Surrogates]
Dibromofluoromethane 98 70-130 %REC EPA 8260B 06/27/22 IG Toluene-D8 109 70-130 %REC EPA 8260B 06/27/22 IG
Bromofluorobenzene 103 70-130 %REC EPA 8260B 06/27/22 IG Sample: 003 SV-2-5 Date & Time Sampled: 06/27/22 10:28 @ Sample Matrix: Air
Purge Volume Sampled: 3
[TPH Gasoline by GCMS ]
C4-C12 <0.6500 0.65 1.3 µg/L 650.0 1,300 µg/m3 0.13 LUFT GCMS 06/27/22 IG [VOCs by GCMS]
Acetone <0.0650 0.065 0.13 µg/L <65.0 65.0 130 µg/m3 0.13 EPA 8260B 06/27/22 IG t-Amyl Methyl Ether (TAME) <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG Benzene <0.0031 0.00312 0.013 µg/L <3.1 3.1 13 µg/m3 0.13 EPA 8260B 06/27/22 IG Bromobenzene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG Bromochloromethane <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG Bromodichloromethane <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG Bromoform <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG Bromomethane <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG t-Butanol (TBA) <0.0650 0.065 0.13 µg/L <65.0 65.0 130 µg/m3 0.13 EPA 8260B 06/27/22 IG 2-Butanone (MEK) <0.0650 0.065 0.13 µg/L <65.0 65.0 130 µg/m3 0.13 EPA 8260B 06/27/22 IG n-Butylbenzene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG The data and information on this, and other accompanying documents, represent only the sample(s) analyzed and is rendered upon condition that it is not to be reproduced, wholly or in part, for advertising or other purposes without approval from the laboratory.

USDA-EPA-NIOSH Testing Food Sanitation Consulting Chemical and Microbiological Analyses and Research Page 1258 of 2028 909-781-6335
1650 S. GROVE AVE., SUITE C
ONTARIO, CA 91761
CHEMISTRY · MICROBIOLOGY · FOOD SAFETY · MOBILE LABORATORIES FOOD · COSMETICS · WATER · SOIL · SOIL VAPOR · WASTES
A & R Laboratories, Inc.
www.arlaboratories.com [email protected]

CERTIFICATE OF ANALYSIS
Date Reported
Date Received
Invoice No.

Cust #
Permit Number
Customer P.O.
95301
1003
185805577
2206-00212
Project: 19081 Yorba Linda Blvd., Yorba Linda, CA 92886 Analysis Result Method Date
06/28/22
06/27/22
MDL RL Units Result MDL RL Units DFQual Tech
STANTEC CONSULTING SVCS., INC.

ALICIA JANSEN
735 E. CARNEGIE DR., STE. 280
SAN BERNARDINO, CA 92408
Sample: 003 SV-2-5 Date & Time Sampled: 06/27/22 10:28 @ Sample Matrix: Air
Purge Volume Sampled: 3
.....continued
sec-Butylbenzene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG tert-Butylbenzene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG Carbon Disulfide <0.0650 0.065 0.13 µg/L <65.0 65.0 130 µg/m3 0.13 EPA 8260B 06/27/22 IG Carbon Tetrachloride <0.0033 0.00325 0.0065 µg/L <3.3 3.3 7 µg/m3 0.13 EPA 8260B 06/27/22 IG Chlorobenzene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG Chloroethane <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG Chloroform 0.040 0.0065 0.013 µg/L 40 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG Chloromethane <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG 2-Chlorotoluene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG 4-Chlorotoluene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG Dibromochloromethane <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG 1,2-Dibromoethane (EDB) <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG 1,2-Dibromo-3-Chloropropane <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG Dibromomethane <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG 1,2-Dichlorobenzene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG 1,3-Dichlorobenzene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG 1,4-Dichlorobenzene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG Dichlorodifluoromethane <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG 1,1-Dichloroethane <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG 1,2-Dichloroethane <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG 1,1-Dichloroethene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG cis-1,2-Dichloroethene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG trans-1,2-Dichloroethene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG 1,2-Dichloropropane <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG 1,3-Dichloropropane <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG 2,2-Dichloropropane <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG 1,1-Dichloropropene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG cis-1,3-Dichloropropene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG trans-1,3-Dichloropropene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG Diisopropyl Ether (DiPE) <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG The data and information on this, and other accompanying documents, represent only the sample(s) analyzed and is rendered upon condition that it is not to be reproduced, wholly or in part, for advertising or other purposes without approval from the laboratory.

USDA-EPA-NIOSH Testing Food Sanitation Consulting Chemical and Microbiological Analyses and Research Page 1259 of 2028 909-781-6335
1650 S. GROVE AVE., SUITE C
ONTARIO, CA 91761
CHEMISTRY · MICROBIOLOGY · FOOD SAFETY · MOBILE LABORATORIES FOOD · COSMETICS · WATER · SOIL · SOIL VAPOR · WASTES
A & R Laboratories, Inc.
www.arlaboratories.com [email protected]

CERTIFICATE OF ANALYSIS
Date Reported
Date Received
Invoice No.

Cust #
Permit Number
Customer P.O.
95301
1003
185805577
2206-00212
Project: 19081 Yorba Linda Blvd., Yorba Linda, CA 92886 Analysis Result Method Date
06/28/22
06/27/22
MDL RL Units Result MDL RL Units DFQual Tech
STANTEC CONSULTING SVCS., INC.

ALICIA JANSEN
735 E. CARNEGIE DR., STE. 280
SAN BERNARDINO, CA 92408
Sample: 003 SV-2-5 Date & Time Sampled: 06/27/22 10:28 @ Sample Matrix: Air
Purge Volume Sampled: 3
.....continued
Ethylbenzene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG Ethyl-t-Butyl Ether (EtBE) <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG Hexachlorobutadiene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG 2-Hexanone <0.0650 0.065 0.13 µg/L <65.0 65.0 130 µg/m3 0.13 EPA 8260B 06/27/22 IG Isopropylbenzene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG 4-Isopropyltoluene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG Methylene Chloride <0.0065 0.0065 0.01 µg/L <6.5 6.5 10 µg/m3 0.13 EPA 8260B 06/27/22 IG 4-Methyl-2-Pentanone (MIBK) <0.0650 0.065 0.13 µg/L <65.0 65.0 130 µg/m3 0.13 EPA 8260B 06/27/22 IG Methyl-t-butyl Ether (MtBE) <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG Naphthalene <0.0027 0.00273 0.0065 µg/L <2.7 2.7 7 µg/m3 0.13 EPA 8260B 06/27/22 IG n-Propylbenzene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG Styrene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG 1,1,1,2-Tetrachloroethane <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG 1,1,2,2-Tetrachloroethane <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG Tetrachloroethene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG Toluene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG 1,2,3-Trichlorobenzene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG 1,2,4-Trichlorobenzene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG 1,1,1-Trichloroethane <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG 1,1,2-Trichloroethane <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG Trichloroethene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG 1,2,3-Trichloropropane <0.0026 0.0026 0.013 µg/L <2.6 2.6 13 µg/m3 0.13 EPA 8260B 06/27/22 IG Trichlorofluoromethane <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG Trichlorotrifluoroethane <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG 1,2,4-Trimethylbenzene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG 1,3,5-Trimethylbenzene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG Vinyl Chloride <0.0003 0.000312 0.0065 µg/L <0.3 0.3 7 µg/m3 0.13 EPA 8260B 06/27/22 IG m,p-Xylenes <0.0130 0.013 0.026 µg/L <13.0 13.0 26 µg/m3 0.13 EPA 8260B 06/27/22 IG o-Xylene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG [VOC Vapor Sampling Tracer]
The data and information on this, and other accompanying documents, represent only the sample(s) analyzed and is rendered upon condition that it is not to be reproduced, wholly or in part, for advertising or other purposes without approval from the laboratory.

USDA-EPA-NIOSH Testing Food Sanitation Consulting Chemical and Microbiological Analyses and Research Page 1260 of 2028 909-781-6335
1650 S. GROVE AVE., SUITE C
ONTARIO, CA 91761
CHEMISTRY · MICROBIOLOGY · FOOD SAFETY · MOBILE LABORATORIES FOOD · COSMETICS · WATER · SOIL · SOIL VAPOR · WASTES
A & R Laboratories, Inc.
www.arlaboratories.com [email protected]

CERTIFICATE OF ANALYSIS
Date Reported
Date Received
Invoice No.

Cust #
Permit Number
Customer P.O.
95301
1003
185805577
2206-00212
Project: 19081 Yorba Linda Blvd., Yorba Linda, CA 92886 Analysis Result Method Date
06/28/22
06/27/22
MDL RL Units Result MDL RL Units DFQual Tech
STANTEC CONSULTING SVCS., INC.

ALICIA JANSEN
735 E. CARNEGIE DR., STE. 280
SAN BERNARDINO, CA 92408
Sample: 003 SV-2-5 Date & Time Sampled: 06/27/22 10:28 @ Sample Matrix: Air
Purge Volume Sampled: 3
.....continued
Isopropanol (IPA) <0.0650 0.065 0.13 µg/L <65.0 65.0 130 µg/m3 0.13 EPA 8260B 06/27/22 IG [VOC Surrogates]
Dibromofluoromethane 99 70-130 %REC EPA 8260B 06/27/22 IG Toluene-D8 110 70-130 %REC EPA 8260B 06/27/22 IG
Bromofluorobenzene 101 70-130 %REC EPA 8260B 06/27/22 IG Sample: 004 SV-2-5-DUP Date & Time Sampled: 06/27/22 10:28 @ Sample Matrix: Air
Purge Volume Sampled: 3
[TPH Gasoline by GCMS ]
C4-C12 <0.6500 0.65 1.3 µg/L 650.0 1,300 µg/m3 0.13 LUFT GCMS 06/27/22 IG [VOCs by GCMS]
Acetone <0.0650 0.065 0.13 µg/L <65.0 65.0 130 µg/m3 0.13 EPA 8260B 06/27/22 IG t-Amyl Methyl Ether (TAME) <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG Benzene <0.0031 0.00312 0.013 µg/L <3.1 3.1 13 µg/m3 0.13 EPA 8260B 06/27/22 IG Bromobenzene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG Bromochloromethane <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG Bromodichloromethane <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG Bromoform <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG Bromomethane <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG t-Butanol (TBA) <0.0650 0.065 0.13 µg/L <65.0 65.0 130 µg/m3 0.13 EPA 8260B 06/27/22 IG 2-Butanone (MEK) <0.0650 0.065 0.13 µg/L <65.0 65.0 130 µg/m3 0.13 EPA 8260B 06/27/22 IG n-Butylbenzene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG sec-Butylbenzene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG tert-Butylbenzene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG Carbon Disulfide <0.0650 0.065 0.13 µg/L <65.0 65.0 130 µg/m3 0.13 EPA 8260B 06/27/22 IG Carbon Tetrachloride <0.0033 0.00325 0.0065 µg/L <3.3 3.3 7 µg/m3 0.13 EPA 8260B 06/27/22 IG Chlorobenzene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG Chloroethane <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG Chloroform 0.040 0.0065 0.013 µg/L 40 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG The data and information on this, and other accompanying documents, represent only the sample(s) analyzed and is rendered upon condition that it is not to be reproduced, wholly or in part, for advertising or other purposes without approval from the laboratory.

USDA-EPA-NIOSH Testing Food Sanitation Consulting Chemical and Microbiological Analyses and Research Page 1261 of 2028 909-781-6335
1650 S. GROVE AVE., SUITE C
ONTARIO, CA 91761
CHEMISTRY · MICROBIOLOGY · FOOD SAFETY · MOBILE LABORATORIES FOOD · COSMETICS · WATER · SOIL · SOIL VAPOR · WASTES
A & R Laboratories, Inc.
www.arlaboratories.com [email protected]

CERTIFICATE OF ANALYSIS
Date Reported
Date Received
Invoice No.

Cust #
Permit Number
Customer P.O.
95301
1003
185805577
2206-00212
Project: 19081 Yorba Linda Blvd., Yorba Linda, CA 92886 Analysis Result Method Date
06/28/22
06/27/22
MDL RL Units Result MDL RL Units DFQual Tech
STANTEC CONSULTING SVCS., INC.

ALICIA JANSEN
735 E. CARNEGIE DR., STE. 280
SAN BERNARDINO, CA 92408
Sample: 004 SV-2-5-DUP Date & Time Sampled: 06/27/22 10:28 @ Sample Matrix: Air
Purge Volume Sampled: 3
.....continued
Chloromethane <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG 2-Chlorotoluene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG 4-Chlorotoluene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG Dibromochloromethane <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG 1,2-Dibromoethane (EDB) <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG 1,2-Dibromo-3-Chloropropane <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG Dibromomethane <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG 1,2-Dichlorobenzene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG 1,3-Dichlorobenzene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG 1,4-Dichlorobenzene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG Dichlorodifluoromethane <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG 1,1-Dichloroethane <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG 1,2-Dichloroethane <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG 1,1-Dichloroethene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG cis-1,2-Dichloroethene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG trans-1,2-Dichloroethene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG 1,2-Dichloropropane <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG 1,3-Dichloropropane <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG 2,2-Dichloropropane <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG 1,1-Dichloropropene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG cis-1,3-Dichloropropene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG trans-1,3-Dichloropropene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG Diisopropyl Ether (DiPE) <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG Ethylbenzene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG Ethyl-t-Butyl Ether (EtBE) <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG Hexachlorobutadiene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG 2-Hexanone <0.0650 0.065 0.13 µg/L <65.0 65.0 130 µg/m3 0.13 EPA 8260B 06/27/22 IG Isopropylbenzene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG 4-Isopropyltoluene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG Methylene Chloride <0.0065 0.0065 0.01 µg/L <6.5 6.5 10 µg/m3 0.13 EPA 8260B 06/27/22 IG The data and information on this, and other accompanying documents, represent only the sample(s) analyzed and is rendered upon condition that it is not to be reproduced, wholly or in part, for advertising or other purposes without approval from the laboratory.

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1650 S. GROVE AVE., SUITE C
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CHEMISTRY · MICROBIOLOGY · FOOD SAFETY · MOBILE LABORATORIES FOOD · COSMETICS · WATER · SOIL · SOIL VAPOR · WASTES
A & R Laboratories, Inc.
www.arlaboratories.com [email protected]

CERTIFICATE OF ANALYSIS
Date Reported
Date Received
Invoice No.

Cust #
Permit Number
Customer P.O.
95301
1003
185805577
2206-00212
Project: 19081 Yorba Linda Blvd., Yorba Linda, CA 92886 Analysis Result Method Date
06/28/22
06/27/22
MDL RL Units Result MDL RL Units DFQual Tech
STANTEC CONSULTING SVCS., INC.

ALICIA JANSEN
735 E. CARNEGIE DR., STE. 280
SAN BERNARDINO, CA 92408
Sample: 004 SV-2-5-DUP Date & Time Sampled: 06/27/22 10:28 @ Sample Matrix: Air
Purge Volume Sampled: 3
.....continued
4-Methyl-2-Pentanone (MIBK) <0.0650 0.065 0.13 µg/L <65.0 65.0 130 µg/m3 0.13 EPA 8260B 06/27/22 IG Methyl-t-butyl Ether (MtBE) <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG Naphthalene <0.0027 0.00273 0.0065 µg/L <2.7 2.7 7 µg/m3 0.13 EPA 8260B 06/27/22 IG n-Propylbenzene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG Styrene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG 1,1,1,2-Tetrachloroethane <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG 1,1,2,2-Tetrachloroethane <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG Tetrachloroethene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG Toluene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG 1,2,3-Trichlorobenzene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG 1,2,4-Trichlorobenzene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG 1,1,1-Trichloroethane <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG 1,1,2-Trichloroethane <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG Trichloroethene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG 1,2,3-Trichloropropane <0.0026 0.0026 0.013 µg/L <2.6 2.6 13 µg/m3 0.13 EPA 8260B 06/27/22 IG Trichlorofluoromethane <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG Trichlorotrifluoroethane <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG 1,2,4-Trimethylbenzene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG 1,3,5-Trimethylbenzene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG Vinyl Chloride <0.0003 0.000312 0.0065 µg/L <0.3 0.3 7 µg/m3 0.13 EPA 8260B 06/27/22 IG m,p-Xylenes <0.0130 0.013 0.026 µg/L <13.0 13.0 26 µg/m3 0.13 EPA 8260B 06/27/22 IG o-Xylene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG [VOC Vapor Sampling Tracer]
Isopropanol (IPA) <0.0650 0.065 0.13 µg/L <65.0 65.0 130 µg/m3 0.13 EPA 8260B 06/27/22 IG [VOC Surrogates]
Dibromofluoromethane 102 70-130 %REC EPA 8260B 06/27/22 IG Toluene-D8 111 70-130 %REC EPA 8260B 06/27/22 IG
Bromofluorobenzene 103 70-130 %REC EPA 8260B 06/27/22 IG The data and information on this, and other accompanying documents, represent only the sample(s) analyzed and is rendered upon condition that it is not to be reproduced, wholly or in part, for advertising or other purposes without approval from the laboratory.

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1650 S. GROVE AVE., SUITE C
ONTARIO, CA 91761
CHEMISTRY · MICROBIOLOGY · FOOD SAFETY · MOBILE LABORATORIES FOOD · COSMETICS · WATER · SOIL · SOIL VAPOR · WASTES
A & R Laboratories, Inc.
www.arlaboratories.com [email protected]

CERTIFICATE OF ANALYSIS
Date Reported
Date Received
Invoice No.

Cust #
Permit Number
Customer P.O.
95301
1003
185805577
2206-00212
Project: 19081 Yorba Linda Blvd., Yorba Linda, CA 92886 Analysis Result Method Date
06/28/22
06/27/22
MDL RL Units Result MDL RL Units DFQual Tech
STANTEC CONSULTING SVCS., INC.

ALICIA JANSEN
735 E. CARNEGIE DR., STE. 280
SAN BERNARDINO, CA 92408
Sample: 005 SV-2-10 Date & Time Sampled: 06/27/22 11:27 @ Sample Matrix: Air
Purge Volume Sampled: 3
[TPH Gasoline by GCMS ]
C4-C12 <0.6500 0.65 1.3 µg/L 650.0 1,300 µg/m3 0.13 LUFT GCMS 06/27/22 IG [VOCs by GCMS]
Acetone <0.0650 0.065 0.13 µg/L <65.0 65.0 130 µg/m3 0.13 EPA 8260B 06/27/22 IG t-Amyl Methyl Ether (TAME) <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG Benzene <0.0031 0.00312 0.013 µg/L <3.1 3.1 13 µg/m3 0.13 EPA 8260B 06/27/22 IG Bromobenzene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG Bromochloromethane <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG Bromodichloromethane <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG Bromoform <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG Bromomethane <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG t-Butanol (TBA) <0.0650 0.065 0.13 µg/L <65.0 65.0 130 µg/m3 0.13 EPA 8260B 06/27/22 IG 2-Butanone (MEK) <0.0650 0.065 0.13 µg/L <65.0 65.0 130 µg/m3 0.13 EPA 8260B 06/27/22 IG n-Butylbenzene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG sec-Butylbenzene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG tert-Butylbenzene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG Carbon Disulfide <0.0650 0.065 0.13 µg/L <65.0 65.0 130 µg/m3 0.13 EPA 8260B 06/27/22 IG Carbon Tetrachloride <0.0033 0.00325 0.0065 µg/L <3.3 3.3 7 µg/m3 0.13 EPA 8260B 06/27/22 IG Chlorobenzene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG Chloroethane <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG Chloroform <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG Chloromethane <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG 2-Chlorotoluene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG 4-Chlorotoluene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG Dibromochloromethane <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG 1,2-Dibromoethane (EDB) <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG 1,2-Dibromo-3-Chloropropane <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG Dibromomethane <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG 1,2-Dichlorobenzene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG 1,3-Dichlorobenzene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG The data and information on this, and other accompanying documents, represent only the sample(s) analyzed and is rendered upon condition that it is not to be reproduced, wholly or in part, for advertising or other purposes without approval from the laboratory.

USDA-EPA-NIOSH Testing Food Sanitation Consulting Chemical and Microbiological Analyses and Research Page 1264 of 2028 909-781-6335
1650 S. GROVE AVE., SUITE C
ONTARIO, CA 91761
CHEMISTRY · MICROBIOLOGY · FOOD SAFETY · MOBILE LABORATORIES FOOD · COSMETICS · WATER · SOIL · SOIL VAPOR · WASTES
A & R Laboratories, Inc.
www.arlaboratories.com [email protected]

CERTIFICATE OF ANALYSIS
Date Reported
Date Received
Invoice No.

Cust #
Permit Number
Customer P.O.
95301
1003
185805577
2206-00212
Project: 19081 Yorba Linda Blvd., Yorba Linda, CA 92886 Analysis Result Method Date
06/28/22
06/27/22
MDL RL Units Result MDL RL Units DFQual Tech
STANTEC CONSULTING SVCS., INC.

ALICIA JANSEN
735 E. CARNEGIE DR., STE. 280
SAN BERNARDINO, CA 92408
Sample: 005 SV-2-10 Date & Time Sampled: 06/27/22 11:27 @ Sample Matrix: Air
Purge Volume Sampled: 3
.....continued
1,4-Dichlorobenzene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG Dichlorodifluoromethane <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG 1,1-Dichloroethane <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG 1,2-Dichloroethane <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG 1,1-Dichloroethene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG cis-1,2-Dichloroethene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG trans-1,2-Dichloroethene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG 1,2-Dichloropropane <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG 1,3-Dichloropropane <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG 2,2-Dichloropropane <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG 1,1-Dichloropropene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG cis-1,3-Dichloropropene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG trans-1,3-Dichloropropene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG Diisopropyl Ether (DiPE) <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG Ethylbenzene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG Ethyl-t-Butyl Ether (EtBE) <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG Hexachlorobutadiene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG 2-Hexanone <0.0650 0.065 0.13 µg/L <65.0 65.0 130 µg/m3 0.13 EPA 8260B 06/27/22 IG Isopropylbenzene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG 4-Isopropyltoluene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG Methylene Chloride <0.0065 0.0065 0.01 µg/L <6.5 6.5 10 µg/m3 0.13 EPA 8260B 06/27/22 IG 4-Methyl-2-Pentanone (MIBK) <0.0650 0.065 0.13 µg/L <65.0 65.0 130 µg/m3 0.13 EPA 8260B 06/27/22 IG Methyl-t-butyl Ether (MtBE) <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG Naphthalene <0.0027 0.00273 0.0065 µg/L <2.7 2.7 7 µg/m3 0.13 EPA 8260B 06/27/22 IG n-Propylbenzene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG Styrene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG 1,1,1,2-Tetrachloroethane <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG 1,1,2,2-Tetrachloroethane <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG Tetrachloroethene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG Toluene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG The data and information on this, and other accompanying documents, represent only the sample(s) analyzed and is rendered upon condition that it is not to be reproduced, wholly or in part, for advertising or other purposes without approval from the laboratory.

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1650 S. GROVE AVE., SUITE C
ONTARIO, CA 91761
CHEMISTRY · MICROBIOLOGY · FOOD SAFETY · MOBILE LABORATORIES FOOD · COSMETICS · WATER · SOIL · SOIL VAPOR · WASTES
A & R Laboratories, Inc.
www.arlaboratories.com [email protected]

CERTIFICATE OF ANALYSIS
Date Reported
Date Received
Invoice No.

Cust #
Permit Number
Customer P.O.
95301
1003
185805577
2206-00212
Project: 19081 Yorba Linda Blvd., Yorba Linda, CA 92886 Analysis Result Method Date
06/28/22
06/27/22
MDL RL Units Result MDL RL Units DFQual Tech
STANTEC CONSULTING SVCS., INC.

ALICIA JANSEN
735 E. CARNEGIE DR., STE. 280
SAN BERNARDINO, CA 92408
Sample: 005 SV-2-10 Date & Time Sampled: 06/27/22 11:27 @ Sample Matrix: Air
Purge Volume Sampled: 3
.....continued
1,2,3-Trichlorobenzene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG 1,2,4-Trichlorobenzene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG 1,1,1-Trichloroethane <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG 1,1,2-Trichloroethane <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG Trichloroethene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG 1,2,3-Trichloropropane <0.0026 0.0026 0.013 µg/L <2.6 2.6 13 µg/m3 0.13 EPA 8260B 06/27/22 IG Trichlorofluoromethane <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG Trichlorotrifluoroethane <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG 1,2,4-Trimethylbenzene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG 1,3,5-Trimethylbenzene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG Vinyl Chloride <0.0003 0.000312 0.0065 µg/L <0.3 0.3 7 µg/m3 0.13 EPA 8260B 06/27/22 IG m,p-Xylenes <0.0130 0.013 0.026 µg/L <13.0 13.0 26 µg/m3 0.13 EPA 8260B 06/27/22 IG o-Xylene <0.0065 0.0065 0.013 µg/L <6.5 6.5 13 µg/m3 0.13 EPA 8260B 06/27/22 IG [VOC Vapor Sampling Tracer]
Isopropanol (IPA) <0.0650 0.065 0.13 µg/L <65.0 65.0 130 µg/m3 0.13 EPA 8260B 06/27/22 IG [VOC Surrogates]
Dibromofluoromethane 99 70-130 %REC EPA 8260B 06/27/22 IG Toluene-D8 110 70-130 %REC EPA 8260B 06/27/22 IG
Bromofluorobenzene 103 70-130 %REC EPA 8260B 06/27/22 IG Respectfully Submitted: Ken Zheng - President
The data and information on this, and other accompanying documents, represent only the sample(s) analyzed and is rendered upon condition that it is not to be reproduced, wholly or in part, for advertising or other purposes without approval from the laboratory.

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1650 S. GROVE AVE., SUITE C
ONTARIO, CA 91761
CHEMISTRY · MICROBIOLOGY · FOOD SAFETY · MOBILE LABORATORIES FOOD · COSMETICS · WATER · SOIL · SOIL VAPOR · WASTES
A & R Laboratories, Inc.
www.arlaboratories.com [email protected]

QUALIFIERS
B = Detected in the associated Method Blank at a concentration above the routine RL B1= BOD blank is over specifications . The reported result may be biased high.

D = Surrogate recoveries are not calculated due to sample dilution E = Estimated value
H = Analyte was prepared and/or analyzed outside of the analytical method holding time I = Matrix Interference
J = Analyte concentration detected between RL and MDL

ABBREVIATIONS
DF = Dilution Factor
RL = Reporting Limit
MDL = Method Detection Limit
Qual = Qualifier
Tech = Technician
The data and information on this, and other accompanying documents, represent only the sample(s) analyzed and is rendered upon condition that it is not to be reproduced, wholly or in part, for advertising or other purposes without approval from the laboratory.

USDA-EPA-NIOSH Testing Food Sanitation Consulting Chemical and Microbiological Analyses and Research Page 1267 of 2028 CHEMISTRY · MICROBIOLOGY · FOOD SAFETY · MOBILE LABORATORIES FOOD · COSMETICS · WATER · SOIL · SOIL VAPOR · WASTES
909-781-6335
1650 S. GROVE AVE., SUITE C
ONTAIRO, CA 91761
A & R Laboratories, Inc.
www.arlaboratories.com [email protected]

QUALITY CONTROL DATA REPORT

STANTEC CONSULTING SVCS., INC.

ALICIA JANSEN
735 E. CARNEGIE DR., STE. 280
SAN BERNARDINO, CA 92408
Date Reported
Date Received
Invoice No.

Customer #
Date Sampled
95301
1003
06/27/2022
Customer P.O.
2206-00212
Project: 19081 Yorba Linda Blvd., Yorba Linda, CA 92886 06/28/2022
06/27/2022
185805577
Method # EPA 8260B QC Reference # 103701 Date Analyzed: 6/27/2022 Technician: IG Samples 001 002 003 004 005 Results LCS %REC LCS %DUP LCS %RPD BLKSRR%
REC
1,1-Dichloroethene 71 75 5.5 Benzene 80 74 7.8 Bromofluorobenzene 107 Chlorobenzene 94 106 11.8 Dibromofluoromethan 97 Toluene 88 101 13.7 Toluene-D8 107 Trichloroethene 85 98 14.3 Control Ranges
LCS %REC LCS %RPD BLKSRR%REC
70 - 130 0 - 25
70 - 130 0 - 25
50 - 150
70 - 130 0 - 25
50 - 150
70 - 130 0 - 25
50 - 150
70 - 130 0 - 25 Method # LUFT GCMS QC Reference # 103702 Date Analyzed: 6/27/2022 Technician: IG Samples 001 002 003 004 005 Results LCS %REC LCS %DUP LCS %RPD
C4-C12 90 102 13.3 Control Ranges
LCS %REC LCS %RPD
70 - 130 0 - 25

CHEMISTRY · MICROBIOLOGY · FOOD SAFETY · MOBILE LABORATORIES FOOD · COSMETICS · WATER · SOIL · SOIL VAPOR · WASTES
909-781-6335
1650 S. GROVE AVE., SUITE C
ONTAIRO, CA 91761
A & R Laboratories, Inc.
www.arlaboratories.com [email protected]

QUALITY CONTROL DATA REPORT

STANTEC CONSULTING SVCS., INC.

ALICIA JANSEN
Date Reported
Date Received
Date Sampled 06/27/2022
2206-00212
Project: 19081 Yorba Linda Blvd., Yorba Linda, CA 92886 06/28/2022
06/27/2022
Method blank results
Ref Test Name Result Qualif Units MDL Ref Test Name Result Qualif Units MDL 103701 Acetone <0.0650 µg/L 0.0650
t-Amyl Methyl Ether (TAME) <0.0065 µg/L 0.0065 Benzene <0.0031 µg/L 0.0031 Bromobenzene <0.0065 µg/L 0.0065 Bromochloromethane <0.0065 µg/L 0.0065 Bromodichloromethane <0.0065 µg/L 0.0065 Bromoform <0.0065 µg/L 0.0065 Bromomethane <0.0065 µg/L 0.0065 t-Butanol (TBA) <0.0650 µg/L 0.0650
2-Butanone (MEK) <0.0650 µg/L 0.0650 n-Butylbenzene <0.0065 µg/L 0.0065 sec-Butylbenzene <0.0065 µg/L 0.0065
tert-Butylbenzene <0.0065 µg/L 0.0065 Carbon Disulfide <0.0650 µg/L 0.0650 Carbon Tetrachloride <0.0033 µg/L 0.0033 Chlorobenzene <0.0065 µg/L 0.0065 Chloroethane <0.0065 µg/L 0.0065 Chloroform <0.0065 µg/L 0.0065 Chloromethane <0.0065 µg/L 0.0065 2-Chlorotoluene <0.0065 µg/L 0.0065
4-Chlorotoluene <0.0065 µg/L 0.0065 Dibromochloromethane <0.0065 µg/L 0.0065 1,2-Dibromoethane (EDB) <0.0065 µg/L 0.0065
1,2-Dibromo-3-Chloropropane <0.0065 µg/L 0.0065 Dibromomethane <0.0065 µg/L 0.0065 1,2-Dichlorobenzene <0.0065 µg/L 0.0065
1,3-Dichlorobenzene <0.0065 µg/L 0.0065
1,4-Dichlorobenzene <0.0065 µg/L 0.0065 Dichlorodifluoromethane <0.0065 µg/L 0.0065 1,1-Dichloroethane <0.0065 µg/L 0.0065
1,2-Dichloroethane <0.0065 µg/L 0.0065
1,1-Dichloroethene <0.0065 µg/L 0.0065
cis-1,2-Dichloroethene <0.0065 µg/L 0.0065
trans-1,2-Dichloroethene <0.0065 µg/L 0.0065
1,2-Dichloropropane <0.0065 µg/L 0.0065
1,3-Dichloropropane <0.0065 µg/L 0.0065
2,2-Dichloropropane <0.0065 µg/L 0.0065
1,1-Dichloropropene <0.0065 µg/L 0.0065
cis-1,3-Dichloropropene <0.0065 µg/L 0.0065
trans-1,3-Dichloropropene <0.0065 µg/L 0.0065 Diisopropyl Ether (DiPE) <0.0065 µg/L 0.0065 Ethylbenzene <0.0065 µg/L 0.0065 Ethyl-t-Butyl Ether (EtBE) <0.0065 µg/L 0.0065 Hexachlorobutadiene <0.0065 µg/L 0.0065 2-Hexanone <0.0650 µg/L 0.0650
Isopropylbenzene <0.0065 µg/L 0.0065
4-Isopropyltoluene <0.0065 µg/L 0.0065 Methylene Chloride <0.0065 µg/L 0.0065 4-Methyl-2-Pentanone (MIBK) <0.0650 µg/L 0.0650 Methyl-t-butyl Ether (MtBE) <0.0065 µg/L 0.0065 Naphthalene <0.0027 µg/L 0.0027 n-Propylbenzene <0.0065 µg/L 0.0065 Styrene <0.0065 µg/L 0.0065 1,1,1,2-Tetrachloroethane <0.0065 µg/L 0.0065
1,1,2,2-Tetrachloroethane <0.0065 µg/L 0.0065 Tetrachloroethene <0.0065 µg/L 0.0065 Toluene <0.0065 µg/L 0.0065 1,2,3-Trichlorobenzene <0.0065 µg/L 0.0065
1,2,4-Trichlorobenzene <0.0065 µg/L 0.0065
1,1,1-Trichloroethane <0.0065 µg/L 0.0065
1,1,2-Trichloroethane <0.0065 µg/L 0.0065 Trichloroethene <0.0065 µg/L 0.0065 1,2,3-Trichloropropane <0.0026 µg/L 0.0026 Trichlorofluoromethane <0.0065 µg/L 0.0065 Trichlorotrifluoroethane <0.0065 µg/L 0.0065 1,2,4-Trimethylbenzene <0.0065 µg/L 0.0065
1,3,5-Trimethylbenzene <0.0065 µg/L 0.0065 Vinyl Chloride <0.0003 µg/L 0.0003 m,p-Xylenes <0.0130 µg/L 0.0130 o-Xylene <0.0065 µg/L 0.0065
Isopropanol (IPA) <0.0650 µg/L 0.0650
103702 C4-C12 <0.6500 µg/L 0.6500

CHEMISTRY · MICROBIOLOGY · FOOD SAFETY · MOBILE LABORATORIES FOOD · COSMETICS · WATER · SOIL · SOIL VAPOR · WASTES
909-781-6335
1650 S. GROVE AVE., SUITE C
ONTAIRO, CA 91761
A & R Laboratories, Inc.
www.arlaboratories.com [email protected]

QUALITY CONTROL DATA REPORT

STANTEC CONSULTING SVCS., INC.

ALICIA JANSEN
Date Reported
Date Received
Date Sampled 06/27/2022
2206-00212
Project: 19081 Yorba Linda Blvd., Yorba Linda, CA 92886 06/28/2022
06/27/2022
Respectfully Submitted: Ken Zheng - President

ANALYSES REQUESTED
Soil:

1. EPA 8015M – Semivolatile Hydrocarbons as Diesel & Oil

2. EPA 8260B by 5035 – Gasoline Range Organics

3. EPA 6010B by 3050B – Arsenic & Lead

4. EPA 8081A by 3546 – Chlorinated Pesticides by GC/ECD

JONES ENVIRONMENTAL

LABORATORY RESULTS
Client: Stantec Consulting Services, Inc. Report date: 7/1/2022 Client Address: 735 E. Carnegie Drive, Suite 280 Jones Ref. No.: ST-20085 San Bernardino, CA Client Ref. No.: 185805577
Attn: Alicia Jansen Date Sampled: 6/24/2022
Date Received: 6/27/2022
Project: CV-Yorba Linda Date Analyzed: 6/29/2022
Physical State: Soil
Approval
Colby Wakeman
Lab Director

Client: Report date: 7/1/2022
Client Address: Jones Ref. No.: ST-20085
Client Ref. No.: 185805577
Attn: Date Sampled: 6/24/2022
Date Received: 6/27/2022
Project: Date Analyzed: 6/27/2022
Physical State: Soil
Sample ID: HA-1-1 HA-2-1 HA-3-1 HA-4-1 HA-5-1
Jones ID: ST-20085-01 ST-20085-03 ST-20085-05 ST-20085-07 ST-20085-09 Reporting Limit Units Carbon Chain Range
C13 - C22 ND ND ND ND ND 10.0 mg/kg
C23 - C40 ND ND ND ND ND 10.0 mg/kg
Dilution Factor 1 1 1 1 1
Surrogate Recovery:

Hexacosane 138% 139% 140% 139% 139%
Batch: FID7_
062722_01
FID7_
062722_01
FID7_
062722_01
FID7_
062722_01
FID7_
062722_01
ND = Value less than reporting limit

JONES ENVIRONMENTAL
Alicia Jansen
Stantec Consulting Services, Inc.

LABORATORY RESULTS
735 E. Carnegie Drive, Suite 280
San Bernardino, CA
CV-Yorba Linda
EPA 8015M - Extended Range Hydrocarbons
QC Limits
50 - 140

Client: Report date: 7/1/2022
Client Address: Jones Ref. No.: ST-20085
Client Ref. No.: 185805577
Attn: Date Sampled: 6/24/2022
Date Received: 6/27/2022
Project: Date Analyzed: 6/27/2022
Physical State: Soil
Sample ID: HA-6-1 HA-7-1 HA-8-1 HA-9-1 HA-10-1
Jones ID: ST-20085-11 ST-20085-13 ST-20085-15 ST-20085-17 ST-20085-19 Reporting Limit Units Carbon Chain Range
C13 - C22 ND ND ND ND ND 10.0 mg/kg
C23 - C40 ND ND ND ND ND 10.0 mg/kg
Dilution Factor 1 1 1 1 1
Surrogate Recovery:

Hexacosane 139% 133% 139% 140% 122%
Batch: FID7_
062722_01
FID7_
062722_01
FID7_
062722_01
FID7_
062722_01
FID7_
062722_01
ND = Value less than reporting limit
EPA 8015M - Extended Range Hydrocarbons
CV-Yorba Linda
Alicia Jansen

JONES ENVIRONMENTAL

LABORATORY RESULTS
Stantec Consulting Services, Inc.
735 E. Carnegie Drive, Suite 280
San Bernardino, CA
QC Limits
50 - 140

Client: Report date: 7/1/2022
Client Address: Jones Ref. No.: ST-20085
Client Ref. No.: 185805577
Attn: Date Sampled: 6/24/2022
Date Received: 6/27/2022
Project: Date Analyzed: 6/27/2022
Physical State: Soil
Sample ID: METHOD
BLANK #1
Jones ID: MB1-
062722FID7
Carbon Chain Range
C13 - C22 ND 10.0 mg/kg
C23 - C40 ND 10.0 mg/kg
Dilution Factor 1
Surrogate Recovery:

Hexacosane 140%
Batch: FID7_
062722_01
ND = Value less than reporting limit
QC Limits
50 - 140

JONES ENVIRONMENTAL QUALITY CONTROL INFORMATION
Stantec Consulting Services, Inc.
735 E. Carnegie Drive, Suite 280
San Bernardino, CA
Units
Alicia Jansen
CV-Yorba Linda
Reporting Limit
EPA 8015M - Extended Range Hydrocarbons

Client: Report date: 7/1/2022
Client Address: Jones Ref. No.: ST-20085
Client Ref. No.: 185805577
Attn: Date Sampled: 6/24/2022
Date Received: 6/27/2022
Project: Date Analyzed: 6/27/2022
Physical State: Soil
BATCH: Prepared: 6/27/2022 Analyzed: 6/27/2022
Result Spike Level % Recovery % RPD % Recovery
Limits Units
LCS: LCS1-062722FID7 SAMPLE SPIKED: CLEAN SOIL
Analyte:

Diesel (C10 - C28) 561 500 112% 60 - 140 mg/kg
Surrogate Recovery:

Hexacosane 136% 50 - 140
LCSD: LCSD1-062722FID7 SAMPLE SPIKED: CLEAN SOIL
Analyte:

Diesel (C10 - C28) 554 500 111% 1.3% 60 - 140 mg/kg
Hexacosane 139% 50 - 140
CCV: CCV1-062722FID7
Analyte:

Diesel (C10 - C28) 1190 1000 119% 80 - 120 mg/kg
LCS = Laboratory Control Sample
LCSD= Laboratory Control Sample Duplicate
CCV = Continuing Calibration Verification
RPD = Relative Percent Difference
Surrogate Recoveries:

EPA 8015M - Extended Range Hydrocarbons

JONES ENVIRONMENTAL QUALITY CONTROL INFORMATION
Stantec Consulting Services, Inc.
735 E. Carnegie Drive, Suite 280
San Bernardino, CA
FID7_ 062722_01
Alicia Jansen
CV-Yorba Linda

Client: Report date: 7/1/2022
Client Address: Jones Ref. No.: ST-20085
Client Ref. No.: 185805577
Attn: Date Sampled: 6/24/2022
Date Received: 6/27/2022
Project: Date Analyzed: 6/29/2022
Physical State: Soil
Sample ID: HA-1-1 HA-2-1 HA-3-1 HA-4-1 HA-5-1
Jones ID: ST-20085-01 ST-20085-03 ST-20085-05 ST-20085-07 ST-20085-09 Reporting Limit Units Analytes:

Gasoline Range Organics (C4-C12) ND ND ND ND ND 0.20 mg/kg Dilution Factor 1 1 1 1 1
Surrogate Recoveries:

Dibromofluoromethane 101% 99% 97% 99% 97%
Toluene-d₈ 106% 104% 104% 102% 101%
4-Bromofluorobenzene 98% 96% 93% 94% 91%
Batch: VOC5-062922-
01 VOC5-062922-
01 VOC5-062922-
01 VOC5-062922-
01 VOC5-062922-
01 ND = Value less than reporting limit

JONES ENVIRONMENTAL LABORATORY RESULTS
Alicia Jansen
Stantec Consulting Services, Inc.
735 E. Carnegie Drive, Suite 280
San Bernardino, CA
CV-Yorba Linda
EPA 8260B by 5035 – Volatile Organics by GC/MS + Oxygenates/Gasoline Range Organics 60 - 140
60 - 140
60 - 140
QC Limits

Client: Report date: 7/1/2022
Client Address: Jones Ref. No.: ST-20085
Client Ref. No.: 185805577
Attn: Date Sampled: 6/24/2022
Date Received: 6/27/2022
Project: Date Analyzed: 6/29/2022
Physical State: Soil
Sample ID: HA-6-1 HA-7-1 HA-8-1 HA-9-1 HA-10-1
Jones ID: ST-20085-11 ST-20085-13 ST-20085-15 ST-20085-17 ST-20085-19 Reporting Limit Units Analytes:

Gasoline Range Organics (C4-C12) ND ND ND ND ND 0.20 mg/kg Dilution Factor 1 1 1 1 1
Surrogate Recoveries:

Dibromofluoromethane 100% 96% 97% 99% 100%
Toluene-d₈ 104% 100% 102% 102% 105%
4-Bromofluorobenzene 94% 90% 93% 92% 93%
Batch: VOC5-062922-
01 VOC5-062922-
01 VOC5-062922-
01 VOC5-062922-
01 VOC5-062922-
01 ND = Value less than reporting limit
EPA 8260B by 5035 – Volatile Organics by GC/MS + Oxygenates/Gasoline Range Organics CV-Yorba Linda
Alicia Jansen

JONES ENVIRONMENTAL LABORATORY RESULTS
Stantec Consulting Services, Inc.
735 E. Carnegie Drive, Suite 280
San Bernardino, CA
60 - 140
60 - 140
60 - 140
QC Limits

Client: Report date: 7/1/2022
Client Address: Jones Ref. No.: ST-20085
Client Ref. No.: 185805577
Attn: Date Sampled: 6/24/2022
Date Received: 6/27/2022
Project: Date Analyzed: 6/29/2022
Physical State: Soil
Sample ID: METHOD
BLANK #1
METHOD
BLANK #2
METHOD
BLANK #3
METHOD
BLANK #4
METHOD
BLANK #5
Jones ID: 062922-
V5MB1
DD2-
II2MBBB2
DD3-
II3MBBB3
DD4-
II4MBBB4
DD5-
II5MBBB5
Analytes:

Gasoline Range Organics (C4-C12) ND ND ND ND ND 0.20 mg/kg Surrogate Recoveries:

Dibromofluoromethane 102%
Toluene-d₈ 103%
4-Bromofluorobenzene 99%
Batch: VOC5-062922-
01 II2-DD2-0BB2 II3-DD3-0BB3 II4-DD4-0BB4 II5-DD5-0BB5
ND = Value less than reporting limit
735 E. Carnegie Drive, Suite 280
San Bernardino, CA
Alicia Jansen
CV-Yorba Linda
EPA 8260B by 5035 – Volatile Organics by GC/MS + Oxygenates/Gasoline Range Organics

JONES ENVIRONMENTAL LABORATORY RESULTS
Stantec Consulting Services, Inc.
60 - 140
60 - 140
60 - 140
Reporting Limit Units
QC Limits

Client: 7/1/2022
Client Address: ST-20085
185805577
Attn: 6/24/2022
6/27/2022
Project: 6/29/2022
Soil
GC#:

Jones ID: 062922-V5LCS1 062922-V5LCSD1 062922-V5CCV1
Parameter
LCS
Recovery (%)
LCSD
Recovery (%) RPD
Acceptability
Range (%) CCV
Acceptability
Range (%)
Vinyl chloride 129% 130% 0.5% 60 - 140 115% 80 - 120
1,1-Dichloroethene 109% 108% 1.1% 60 - 140 105% 80 - 120 Cis-1,2-Dichloroethene 92% 91% 1.0% 70 - 130 105% 80 - 120 1,1,1-Trichloroethane 100% 97% 3.2% 70 - 130 110% 80 - 120 Benzene 104% 104% 0.9% 70 - 130 111% 80 - 120
Trichloroethene 99% 97% 2.1% 70 - 130 107% 80 - 120
Toluene 106% 106% 0.0% 70 - 130 105% 80 - 120
Tetrachloroethene 93% 92% 0.5% 70 - 130 103% 80 - 120
Chlorobenzene 96% 97% 1.2% 70 - 130 106% 80 - 120
Ethylbenzene 94% 92% 2.3% 70 - 130 100% 80 - 120
1,2,4 Trimethylbenzene 93% 95% 2.0% 70 - 130 94% 80 - 120 Gasoline Range Organics (C4-C12) 99% 99% 0.3% 70 - 130
Surrogate Recovery:

Dibromofluoromethane 102% 100% 60 - 140 115% 60 - 140
Toluene-d₈ 105% 103% 60 - 140 110% 60 - 140
4-Bromofluorobenzene 102% 100% 60 - 140 109% 60 - 140
CCV = Continuing Calibration Verification
Report date:

Jones Ref. No.:

Client Ref. No.:

Date Sampled:

Date Received:

Date Analyzed:

Physical State:

JONES ENVIRONMENTAL QUALITY CONTROL INFORMATION
Alicia Jansen
735 E. Carnegie Drive, Suite 280
Stantec Consulting Services, Inc.

San Bernardino, CA
RPD = Relative Percent Difference; Acceptability range for RPD is ≤ 20% VOC5-062922-01
EPA 8260B by 5035 – Volatile Organics by GC/MS + Oxygenates/Gasoline Range Organics CV-Yorba Linda
LCS = Laboratory Control Sample
LCSD = Laboratory Control Sample Duplicate

Client: Report date: 7/1/2022
Client Address: Jones Ref. No.: ST-20085
Client Ref. No.: 185805577
Attn: Date Sampled: 6/24/2022
Date Received: 6/27/2022
Project: Date Analyzed: 6/27/2022
Project Address: Physical State: Soil
Sample ID: HA-1-1 HA-2-1 HA-3-1 HA-4-1 HA-5-1
Jones ID: ST-20085-01 ST-20085-03 ST-20085-05 ST-20085-07 ST-20085-09 Reporting Limit Units Analytes:

Arsenic, As ND ND ND ND ND 5.0 mg/kg
Lead, Pb 6.3 2.1 2.6 2.5 3.9 0.5 mg/kg
Dilution Factor 1 1 1 1 1
Batch: I22062701 I22062701 I22062701 I22062701 I22062701 ND = Value less than reporting limit
CV - Yorba Linda
Yorba Linda, CA
EPA 6010B by 3051 - by ICP-OES

JONES ENVIRONMENTAL
Alicia Jansen
Stantec Consulting Services, Inc.

LABORATORY RESULTS
735 E. Carnegie Dr., Suite 280
San Bernandino, CA 92408

Client: Report date: 7/1/2022
Client Address: Jones Ref. No.: ST-20085
Client Ref. No.: 185805577
Attn: Date Sampled: 6/24/2022
Date Received: 6/27/2022
Project: Date Analyzed: 6/27/2022
Project Address: Physical State: Soil
Sample ID: HA-6-1 HA-7-1 HA-8-1 HA-9-1 HA-10-1
Jones ID: ST-20085-11 ST-20085-13 ST-20085-15 ST-20085-17 ST-20085-19 Reporting Limit Units Analytes:

Arsenic, As ND ND ND ND ND 5.0 mg/kg
Lead, Pb 3.5 3.5 7.7 9.3 3.5 0.5 mg/kg
Dilution Factor 1 1 1 1 1
Batch: I22062701 I22062701 I22062701 I22062701 I22062701 ND = Value less than reporting limit
San Bernandino, CA 92408
Alicia Jansen
EPA 6010B by 3051 - by ICP-OES

JONES ENVIRONMENTAL

LABORATORY RESULTS
Stantec Consulting Services, Inc.
735 E. Carnegie Dr., Suite 280
CV - Yorba Linda
Yorba Linda, CA

Client: Report date: 7/1/2022
Client Address: Jones Ref. No.: ST-20085
Client Ref. No.: 185805577
Attn: Date Sampled: 6/24/2022
Date Received: 6/27/2022
Project: Date Analyzed: 6/27/2022
Project Address: Physical State: Soil
BATCH: Prepared: 6/27/2022 Analyzed: 6/27/2022
Analytes:

Method Blank:

Arsenic, As ND 5.0 mg/kg
Lead, Pb ND 0.5 mg/kg
LCS:

Arsenic, As 179 200 90% 80 - 120 mg/kg
Lead, Pb 48.6 50.0 97% 80 - 120 mg/kg
LCSD:

Arsenic, As 168 200 84% 6.3% 80 - 120 mg/kg
Lead, Pb 45.2 50.0 90% 7.2% 80 - 120 mg/kg
CCV:

Arsenic, As 0.99 1.00 99% 90-110 mg/L
Lead, Pb 1.01 1.00 101% 90-110 mg/L
ND= Not Detected
LCS = Laboratory Control Sample
LCSD= Laboratory Control Sample Duplicate
CCV = Continuing Calibration Verification
RPD = Relative Percent Difference
RPD = Relative Percent Difference; Acceptability range for RPD is ≤ 15% I220627-MB1
I220627-LCS1
I220627-LCSD1
I220627-CCV1
EPA 6010B by 3051 - by ICP-OES
Result Spike Level % REC % RPD % REC Limits Reporting Limit Units

JONES ENVIRONMENTAL QUALITY CONTROL INFORMATION
Stantec Consulting Services, Inc.
735 E. Carnegie Dr., Suite 280
San Bernandino, CA 92408
I22062701
Alicia Jansen
CV - Yorba Linda
Yorba Linda, CA

Client: Report date: 7/1/2022
Client Address: Jones Ref. No.: ST-20085
Client Ref. No.: 185805577
Attn: Date Sampled: 6/24/2022
Date Received: 6/27/2022
Project: Date Analyzed: 6/28, 6/29/2022
Physical State: Soil
Sample ID: HA-1-1 HA-2-1 HA-3-1 HA-4-1 HA-5-1
Jones ID: ST-20085-01 ST-20085-03 ST-20085-05 ST-20085-07 ST-20085-09 Reporting Limit Units Analytes:
α-BHC ND ND ND ND ND 10 ug/kg
γ-BHC (Lindane) ND ND ND ND ND 10 ug/kg
β-BHC ND ND ND ND ND 10 ug/kg
Heptachlor ND ND ND ND ND 10 ug/kg
δ-BHC ND ND ND ND ND 10 ug/kg
Aldrin ND ND ND ND ND 10 ug/kg
Heptachlor Epoxide ND ND ND ND ND 10 ug/kg
γ-Chlordane ND ND ND ND ND 10 ug/kg
α-Chlordane ND ND ND ND ND 10 ug/kg
Endosulfan I ND ND ND ND ND 10 ug/kg
4,4'-DDE ND ND ND ND ND 10 ug/kg
Dieldrin ND ND ND ND ND 10 ug/kg
Endrin ND ND ND ND ND 10 ug/kg
4,4'-DDD ND ND ND ND ND 10 ug/kg
Endosulfan II ND ND ND ND ND 10 ug/kg
4,4'-DDT ND ND ND ND ND 10 ug/kg
Endrin Aldehyde ND ND ND ND ND 10 ug/kg
Endosulfan Sulfate ND ND ND ND ND 10 ug/kg
Methoxychlor ND ND ND ND ND 20 ug/kg
Endrin Ketone ND ND ND ND ND 10 ug/kg
Toxaphene ND ND ND ND ND 20 ug/kg
Dilution Factor 1 1 1 1 1
Surrogate Recovery:

TCMX 89% 112% 98% 88% 90%
Decachlorobiphenyl 90% 120% 111% 108% 97%
Batch: ECD4_
062822_01
ECD4_
062822_01
ECD4_
062822_01
ECD4_
062822_01
ECD4_
062822_01
ND = Value less than reporting limit

JONES ENVIRONMENTAL
Alicia Jansen
Stantec Consulting Services, Inc.

LABORATORY RESULTS
735 E. Carnegie Drive, Suite 280
San Bernardino, CA
CV-Yorba Linda
QC Limits
30 - 120
EPA 8081A – Chlorinated Pesticides by GC/ECD
30 - 120

Client: Report date: 7/1/2022
Client Address: Jones Ref. No.: ST-20085
Client Ref. No.: 185805577
Attn: Date Sampled: 6/24/2022
Date Received: 6/27/2022
Project: Date Analyzed: 6/28, 6/29/2022
Project Address: Physical State: Soil
Sample ID: HA-6-1 HA-7-1 HA-8-1 HA-9-1 HA-10-1
Jones ID: ST-20085-11 ST-20085-13 ST-20085-15 ST-20085-17 ST-20085-19 Reporting Limit Units Analytes:
α-BHC ND ND ND ND ND 10 ug/kg
γ-BHC (Lindane) ND ND ND ND ND 10 ug/kg
β-BHC ND ND ND ND ND 10 ug/kg
Heptachlor ND ND ND ND ND 10 ug/kg
δ-BHC ND ND ND ND ND 10 ug/kg
Aldrin ND ND ND ND ND 10 ug/kg
Heptachlor Epoxide ND ND ND ND ND 10 ug/kg
γ-Chlordane ND ND ND ND ND 10 ug/kg
α-Chlordane ND ND ND ND ND 10 ug/kg
Endosulfan I ND ND ND ND ND 10 ug/kg
4,4'-DDE ND ND ND 137* ND 10 ug/kg
Dieldrin ND ND ND ND ND 10 ug/kg
Endrin ND ND ND ND ND 10 ug/kg
4,4'-DDD ND ND ND ND ND 10 ug/kg
Endosulfan II ND ND ND ND ND 10 ug/kg
4,4'-DDT ND ND ND 38.4 ND 10 ug/kg
Endrin Aldehyde ND ND ND ND ND 10 ug/kg
Endosulfan Sulfate ND ND ND ND ND 10 ug/kg
Methoxychlor ND ND ND ND ND 20 ug/kg
Endrin Ketone ND ND ND ND ND 10 ug/kg
Toxaphene ND ND ND ND ND 20 ug/kg
Dilution Factor 1 1 1 1/2* 1
Surrogate Recovery:

TCMX 82% 85% 86% 54% 78%
Decachlorobiphenyl 97% 95% 97% 60% 73%
Batch: ECD4_
062822_01
ECD4_
062822_01
ECD4_
062822_01
ECD4_
062822_01/
ECD4_
062922 01*
ECD4_
062822_01
* = Dilutions for these compound(s); first number for all others ND = Value less than reporting limit
Alicia Jansen

JONES ENVIRONMENTAL

LABORATORY RESULTS
Stantec Consulting Services, Inc.
735 E. Carnegie Drive, Suite 280
San Bernardino, CA
CV-Yorba Linda
EPA 8081A – Chlorinated Pesticides by GC/ECD
QC Limits
30 - 120
30 - 120

Client: Report date: 7/1/2022
Client Address: Jones Ref. No.: ST-20085
Client Ref. No.: 185805577
Attn: Date Sampled: 6/24/2022
Date Received: 6/27/2022
Project: Date Analyzed: 6/28, 6/29/2022
Physical State: Soil
Sample ID: METHOD
BLANK #1
METHOD
BLANK #2
Jones ID: MB1-
062822ECD4
MB1-
062922ECD4 Reporting Limit Units
Analytes:
α-BHC ND ND 10 ug/kg
γ-BHC (Lindane) ND ND 10 ug/kg
β-BHC ND ND 10 ug/kg
Heptachlor ND ND 10 ug/kg
δ-BHC ND ND 10 ug/kg
Aldrin ND ND 10 ug/kg
Heptachlor Epoxide ND ND 10 ug/kg
γ-Chlordane ND ND 10 ug/kg
α-Chlordane ND ND 10 ug/kg
Endosulfan I ND ND 10 ug/kg
4,4'-DDE ND ND 10 ug/kg
Dieldrin ND ND 10 ug/kg
Endrin ND ND 10 ug/kg
4,4'-DDD ND ND 10 ug/kg
Endosulfan II ND ND 10 ug/kg
4,4'-DDT ND ND 10 ug/kg
Endrin Aldehyde ND ND 10 ug/kg
Endosulfan Sulfate ND ND 10 ug/kg
Methoxychlor ND ND 20 ug/kg
Endrin Ketone ND ND 10 ug/kg
Toxaphene ND ND 20 ug/kg
Dilution Factor 1 1
Surrogate Recovery:

TCMX 119% 120%
Decachlorobiphenyl 119% 111%
Batch: ECD4_
062822_01
ECD4_
062922_01
ND = Value less than reporting limit
EPA 8081A – Chlorinated Pesticides by GC/ECD
30 - 120
Alicia Jansen
CV-Yorba Linda
QC Limits
30 - 120

JONES ENVIRONMENTAL

LABORATORY RESULTS
Stantec Consulting Services, Inc.
735 E. Carnegie Drive, Suite 280
San Bernardino, CA

Client: Report date: 7/1/2022
Client Address: Jones Ref. No.: ST-20085
Client Ref. No.: 185805577
Attn: Date Sampled: 6/24/2022
Date Received: 6/27/2022
Project: Date Analyzed: 6/28, 6/29/2022
Physical State: Soil
BATCH: Prepared: 6/28/2022 Analyzed: 6/28/2022
LCS LCSD % RPD Spike Level % Recovery
Limits Units
LCS1-062822ECD4 LCSD1-062822ECD4
Analytes:
α-BHC 133 132 1% 100 60 - 140 ppb
Heptachlor 132 129 2% 100 60 - 140 ppb
Aldrin 127 123 3% 100 60 - 140 ppb
Heptachlor Epoxide 125 120 4% 100 60 - 140 ppb
γ-Chlordane 126 119 6% 100 60 - 140 ppb
Endosulfan I 122 116 5% 100 60 - 140 ppb
4,4'-DDE 127 120 6% 100 60 - 140 ppb
Dieldrin 130 122 6% 100 60 - 140 ppb
Endrin 127 119 7% 100 60 - 140 ppb
4,4'-DDD 128 118 8% 100 60 - 140 ppb
Endosulfan II 139 126 10% 100 60 - 140 ppb
4,4'-DDT 134 122 9% 100 60 - 140 ppb
Endrin Ketone 137 126 8% 100 60 - 140 ppb
Surrogate Recoveries:

TCMX 118% 113% 30 - 120
Decachlorobiphenyl 119% 120% 30 - 120

JONES ENVIRONMENTAL QUALITY CONTROL INFORMATION
Stantec Consulting Services, Inc.
735 E. Carnegie Drive, Suite 280
San Bernardino, CA
Alicia Jansen
CV-Yorba Linda
ECD4_ 062822_01
EPA 8081A – Chlorinated Pesticides by GC/ECD
LCSD= Laboratory Control Sample Duplicate
RPD = Relative Percent Difference
LCS= Laboratory Control Sample

Client: Report date: 7/1/2022
Client Address: Jones Ref. No.: ST-20085
Client Ref. No.: ############################################################################################################################################################################################################################################################### Attn: Date Sampled: 6/24/2022
Date Received: 6/27/2022
Project: Date Analyzed: 6/28, 6/29/2022
Physical State: Soil
BATCH: Prepared: 6/28/2022 Analyzed: 6/28/2022
Result Spike Level % Recovery % Recovery
Limits Units
CCV:

Analytes:
α-BHC 52.3 50 105% 80-120 ppb
Heptachlor 55.5 50 111% 80-120 ppb
Aldrin 52.0 50 104% 80-120 ppb
Heptachlor Epoxide 52.9 50 106% 80-120 ppb
γ-Chlordane 51.0 50 102% 80-120 ppb
Endosulfan I 52.5 50 105% 80-120 ppb
4,4'-DDE 105 100 105% 80-120 ppb
Dieldrin 104 100 104% 80-120 ppb
Endrin 103 100 103% 80-120 ppb
4,4'-DDD 99.8 100 100% 80-120 ppb
Endosulfan II 104 100 104% 80-120 ppb
4,4'-DDT 106 100 106% 80-120 ppb
Endrin Ketone 102 100 102% 80-120 ppb
Surrogate Recovery:

TCMX 109% 80-120
Decachlorobiphenyl 97% 80-120

JONES ENVIRONMENTAL QUALITY CONTROL INFORMATION
Stantec Consulting Services, Inc.
735 E. Carnegie Drive, Suite 280
San Bernardino, CA
Alicia Jansen
CV-Yorba Linda
ECD4_ 062822_01
EPA 8081A – Chlorinated Pesticides by GC/ECD
CCV= Continuing Calibration Verification
CCV1-062822ECD4

Client: Report date: 7/1/2022
Client Address: Jones Ref. No.: ST-20085
Client Ref. No.: 185805577
Attn: Date Sampled: 6/24/2022
Date Received: 6/27/2022
Project: Date Analyzed: 6/28, 6/29/2022
Physical State: Soil
BATCH: Prepared: 6/29/2022 Analyzed: 6/29/2022
LCS LCSD % RPD Spike Level % Recovery
Limits Units
LCS1-062922ECD4 LCSD1-062922ECD4
Analytes:
α-BHC 118 119 1% 100 60 - 140 ppb
Heptachlor 117 117 0% 100 60 - 140 ppb
Aldrin 116 117 1% 100 60 - 140 ppb
Heptachlor Epoxide 112 115 3% 100 60 - 140 ppb
γ-Chlordane 114 117 3% 100 60 - 140 ppb
Endosulfan I 112 114 2% 100 60 - 140 ppb
4,4'-DDE 116 120 3% 100 60 - 140 ppb
Dieldrin 117 120 3% 100 60 - 140 ppb
Endrin 105 108 3% 100 60 - 140 ppb
4,4'-DDD 115 122 6% 100 60 - 140 ppb
Endosulfan II 121 127 5% 100 60 - 140 ppb
4,4'-DDT 106 112 6% 100 60 - 140 ppb
Endrin Ketone 126 131 4% 100 60 - 140 ppb
Surrogate Recoveries:

TCMX 111% 113% 30 - 120
Decachlorobiphenyl 107% 118% 30 - 120

JONES ENVIRONMENTAL QUALITY CONTROL INFORMATION
Stantec Consulting Services, Inc.
735 E. Carnegie Drive, Suite 280
San Bernardino, CA
Alicia Jansen
CV-Yorba Linda
ECD4_ 062922_01
EPA 8081A – Chlorinated Pesticides by GC/ECD
LCS= Laboratory Control Sample
LCSD= Laboratory Control Sample Duplicate
RPD = Relative Percent Difference

Client: Report date: 7/1/2022
Client Address: Jones Ref. No.: ST-20085
Client Ref. No.: ############################################################################################################################################################################################################################################################### Attn: Date Sampled: 6/24/2022
Date Received: 6/27/2022
Project: Date Analyzed: 6/28, 6/29/2022
Physical State: Soil
BATCH: Prepared: 6/29/2022 Analyzed: 6/29/2022
Result Spike Level % Recovery % Recovery
Limits Units
CCV:

Analytes:
α-BHC 53.8 50 108% 80-120 ppb
Heptachlor 58.1 50 116% 80-120 ppb
Aldrin 54.8 50 110% 80-120 ppb
Heptachlor Epoxide 55.8 50 112% 80-120 ppb
γ-Chlordane 54.4 50 109% 80-120 ppb
Endosulfan I 55.1 50 110% 80-120 ppb
4,4'-DDE 111 100 111% 80-120 ppb
Dieldrin 108 100 108% 80-120 ppb
Endrin 94.4 100 94% 80-120 ppb
4,4'-DDD 106 100 106% 80-120 ppb
Endosulfan II 110 100 110% 80-120 ppb
4,4'-DDT 111 100 111% 80-120 ppb
Endrin Ketone 114 100 114% 80-120 ppb
Surrogate Recovery:

TCMX 112% 80-120
Decachlorobiphenyl 106% 80-120

JONES ENVIRONMENTAL QUALITY CONTROL INFORMATION
Stantec Consulting Services, Inc.
735 E. Carnegie Drive, Suite 280
San Bernardino, CA
Alicia Jansen
CV-Yorba Linda
ECD4_ 062922_01
EPA 8081A – Chlorinated Pesticides by GC/ECD
CCV1-062922ECD4
CCV= Continuing Calibration Verification

PRELIMINARY HYDROLOGY STUDY
Tentative Tract Map No. 19389
19081 Yorba Linda Blvd
City of Yorba Linda, County of Orange
Project Address:
19081 Yorba Linda Boulevard
City of Yorba Linda, CA 92886
Prepared For:

City Ventures Homebuilding
3121 Michelson Drive, Suite 150
Irvine, Ca 92612
Contact: Patrick Chien, Manager
Prepared By:

C&V Consulting, Inc.
9830 Irvine Center Drive
Irvine, CA 92618
Contact: Dane P. McDougall, P.E., President
Prepared: March 2025

Preliminary Hydrology Study
For
TTM 19389
19081 Yorba Linda Blvd.

Acknowledgement and Signature Page
This Preliminary Hydrology Study was prepared by C&V Consulting, Inc. under the supervision of Dane P. McDougall, P.E.
___________________________________________ _________________ Dane P. McDougall, P.E. 80705 Date
C&V Consulting, Inc.

TABLE OF CONTENTS
I. PURPOSE ............................................................................................................................... 1 II. SITE DESCRIPTION ............................................................................................................. 1 III. EXISTING CONDITIONS ..................................................................................................... 1 IV. PROPOSED CONDITIONS ................................................................................................... 3 V. METHODOLOGY ................................................................................................................. 4 VI. DESIGN ASSUMPTION ....................................................................................................... 5 VII. HYDROLOGY ANALYSIS .................................................................................................. 6 Hydrology Summary ........................................................................................................... 6 VIII.HYDRAULIC ANALYSIS .................................................................................................... 8 Catch Basin Inlet Sizing...................................................................................................... 8 Pipe Sizing .......................................................................................................................... 8 100-Year Water Surface Elevation (WSE) ......................................................................... 8 IX. CONCLUSION ....................................................................................................................... 9 X. REFERENCES ....................................................................................................................... 9

APPENDICES

APPENDIX A MAPS AND EXHIBITS
Existing Conditions Hydrology Map
Proposed Conditions Hydrology Map
FEMA Flood Map
Soil Map

APPENDIX B HYDROLOGY ANALYSIS
Existing Conditions – Rational Method
Proposed Conditions – Rational Method

APPENDIX C HYDROGRAPH ANALYSIS
Small Area Unit Hydrograph

APPENDIX D HYDRAULIC ANALYSIS

APPENDIX E REFERENCE MATERIALS

Preliminary Hydrology Study
City of Yorba Linda, County of Orange
1 | P a g e
I. Purpose
The purpose of this report is to provide quantitative information to verify storm drain infrastructure and hydrologic compliance of the project site and analyze potential impacts on existing downstream infrastructure. The values and statements within this report confirm the subject site is designed and planned in accordance with the latest Orange County Hydrology Manual (OCHM) as mandated by the Orange County Flood Division. The goal of the agency is to provide 100-year return frequency flood protection for all habitable structures and other nonflood proof structures. Consequently, all drainage plans must demonstrate compliance with this 100-year flood protection criterion. This study will also determine whether detention or other peak flow mitigation methods are required by comparing the proposed and existing condition peak flow rates for the 50- and 100- year storm events. The values and statements within this report confirm the subject site is designed and planned in accordance with the Orange County Hydrology Manual and the City of Yorba Linda drainage requirements.

II. Site Description
The site is located at 19081 Yorba Linda Blvd (APN: 323-081-35) in the city of Yorba Linda, County of Orange. It encompasses one (1) parcel consisting of approximately 2.647 acres. The site is bounded by a pre-school and church to the west, single family homes and a park to the east, a single family home to the north, and Yorba Linda Blvd to the south.

According to the Natural Resources Conservation Service (NRCS) the project site consists of Yorba gravelly sandy loam, with 2 to 9 percent slopes. The Hydrologic Soil Group of the site is determined to be Type C soils.

According to the federal Emergency Management Agency (FEMA) FIRM rate map number 06059C0068J, effective date December 3, 2009, the site is located within flood Zone X, area of minimal flood hazard.

A separate Water Quality Management Plan is prepared to address the County storm water quality requirements.

Refer to Appendix A for additional information on site location.

III. Existing Conditions
The site is currently occupied by two single family homes with detached garages and a shared driveway. The majority of the site is undeveloped and is covered in soil, trees and shrubs with a few sheds scattered throughout. Based on aerial topography, the site appears to be a garden/ planting nursery. The site is surrounded by chain link fence and vinyl fencing along with a short 1-foot to 2-foot low block wall on the northern portion of the site. There is a 10’ wide equestrian trail north of the property line with a block wall for the single-family home. There is one existing concrete driveway entrance along Yorba Linda Blvd. providing primary access to the existing single-family homes. There is an existing 5’ wide curb-adjacent sidewalk with a chain link fence with shrubs growing on it along Yorba Linda Blvd. fronting the project site. The elevation of the site ranges from 439 to 455 feet above sea level.

Preliminary Hydrology Study
City of Yorba Linda, County of Orange
2 | P a g e
Stormwater runoff generally sheet flows overland in the southwesterly direction until it enters the right-of-way at Yorba Linda Blvd via the driveway. Once runoff enters Yorba Linda Blvd, it is conveyed via curb and gutter west to a catch basin at the intersection of Yorba Linda Blvd and Ohio Street.

The site experiences offsite runon along the northern property line. There is an equestrian trail that runs along the northern property line that drains to the site’s northwest corner. The residential lots north of the equestrian trail and a portion of Lynn Lane drains to the northwest corner of the site as well.

Per the City of Yorba Linda Zoning Map, the site is identified as being within the Residential Estate (RS) zone. According to the city’s General Plan Land Use Map, the site is identified as Residential – Medium Low. The site is also surrounded by Residential Medium Low with a portion of Open Space – General on the east.

Refer to the Preliminary Existing Conditions Hydrology Maps located within Appendix A.

Preliminary Hydrology Study
City of Yorba Linda, County of Orange
3 | P a g e
IV. Proposed Conditions
The project proposes the construction of sixty-two (62) multi‐family condominium units within twelve (12) buildings with open space areas that will incorporate landscaping to the maximum extent feasible. The project proposes onsite private drive aisles, parking areas, hardscaping, and landscaping, which can be accessed from the main entrance from the public right-of-way of Yorba Linda Blvd. Drive aisles and parking areas will be asphalt concrete pavement, and sidewalk areas will be Portland concrete cement (PCC). Landscaping, including vegetation and trees, will be incorporated into open space areas. Open space areas and landscape areas will be maintained by an appointed property management company. Long-term maintenance will be managed by an appointed Homeowner’s Association selected by City Ventures Homebuilding, LLC.

The proposed residential development will be divided into two (2) Drainage Areas which will be graded to match the existing drainage condition. The storm water will be collected and conveyed by a series of area drains and street surface flow, towards curb opening biofiltration devices and grated inlets. Runoff that enters the grated inlets will be routed to the biofiltration devices for water quality treatment. The biofiltration devices are equipped with an internal bypass so that when the water quality treatment flow rate is exceeded, runoff will bypass treatment and be routed into the proposed underground storm drain system and detention pipe. The detention pipe will feed runoff into the proposed storm water sump pump that will discharge at pre-development flow rates into a parkway drain and into the public right-of-way of Yorba Linda Blvd. When the detention pipe is at capacity or in the event that the storm drain system becomes inoperable, runoff will overflow within the catch basin at the project entrance and will enter the right-of-way of Yorba Linda Blvd over the proposed driveway apron.

Offsite runoff will be conveyed through wall knockouts into a proposed U-Channel along the western property line. These flows will be kept separate from onsite flows generated from the proposed development. Runoff will continue in the U-Channel until it reaches the southern property line where it will be discharged into the public right-of-way of Yorba Linda Blvd via a parkway drain.

During Final Engineering WSPG will be utilized to determine hydraulic adequacy of the proposed private storm drain system using the 25-year peak flow rates. To be conservative, the peak flow rates tributary to each storm drain line or lateral will be utilized instead of the hydrologic confluence peak flow rates calculated by Civil Design. WSPG is used as an industry standard hydraulic analysis program in Orange County, in which the program computes and plots uniform and non-uniform steady flow water surface profiles and pressure gradients in both open channels and pressurized closed structures. Using Bernoulli’s equation for the total energy at each section and Manning’s formula for the friction loss between sections in a system, a hydraulic grade line is computationally produced. As directed by the county flood control district, the program analyzes the model using the standard step method for open channel flow and the pressure plus momentum theory for confluences and closed structures under pressure. Using these hydraulic principals, the program determines such data as: cross sectional area, wetted perimeter, normal depth, critical depth, pressure, and momentum which was then used to verify the on-site storm drain design.

Refer to the Preliminary Proposed Conditions Hydrology Maps located within Appendix A.

Preliminary Hydrology Study
City of Yorba Linda, County of Orange
4 | P a g e
V. Methodology
All drainage areas were analyzed using the County of Orange Local Drainage and Hydrology Manual and nomographs. The site is small and is comprised of two sub-areas to satisfy the Orange County Hydrology Manual. The sub-areas were analyzed for acreage, land-use, volume, and time of concentration according to the Rational Method. The percentage of pervious area was calculated for the pre- and post-construction conditions and the development type with the percentage pervious closest to the percentage calculated was used over matching development type in the hydrology calculations. In accordance with the Orange County Hydrology Manual all habitable structures have a finished floor elevation to allow one foot of freeboard during the 100-year storm event, the onsite conveyance pipes have been sized to convey runoff from the 25-year storm event.

The onsite catch basins and parkway culvert have been sized to convey runoff from the 100-year storm event. Calculations supporting these sizes are located in Appendix D of this report.

The existing and proposed drainage areas were analyzed by utilizing the latest Orange County Hydrology Manual, Civil Design Software, and Hydraflow Express Extension for Autodesk AutoCAD Civil 3D.

The existing and proposed drainage areas were delineated per the Existing and Proposed Conditions Hydrology Maps, located within Appendix A. Each area was then analyzed for acreage, impervious cover, and Time of Concentration (Tc) per the Rational Method to determine the associated peak flow rates. The peak flow rates, expressed in cubic feet per second (cfs), were confluence at main junction nodes and have been labeled within the Hydrology Maps. This information will be used in conjunction with WSPG and Autodesk software to validate the hydraulic grade line and other hydraulic flow characteristics of the proposed storm drain system.

Pipe sizing calculations and other supporting hydraulic calculations will be provided during final engineering.

Preliminary Hydrology Study
City of Yorba Linda, County of Orange
5 | P a g e
VI. Design Parameters

1. The onsite drainage area was analyzed for the 25- and 100-year storm events using Rational Method Analysis per the County of Orange Hydrology Manual (OCHM). The design of the onsite private storm drain pipes and catch basins will be designed for 25-year storm event, per OCHM (1986) section A.2 which states that major street travel way and sump catch basin to be designed to a 25-year storm event.

2. According to page C-10 of the Orange County Hydrology Manual, the following Antecedent Moisture Conditions (AMC) were used:
i. 25-year storm- AMC II
ii. 100-year storm- AMC III

3. The drainage area is located in Soil Group C according to NRCS Web Soil Survey Map as shown within Appendix D.

4. The rainfall intensity for all storm events varies according to Figure B-3 (page B-7) of the Hydrology Manual.

5. The existing condition utilized commercial, and the proposed condition utilized condominium land uses within the Civil Design for the hydrologic calculations.

6. The impervious area has been calculated to be approximately 16% (0.43 acres) in the existing condition.

7. The impervious area has been estimated to be approximately 85% (2.25 acres) for the proposed condition based on a conversative multi-family residential coverage.

8. Existing and Proposed Conditions Hydrology Maps have been made a part of this report based on the hydrologic calculation and are located within Appendix A.

9. The proposed development’s surface runoff has been designed based on the historical drainage pathways of the existing condition.

10. The proposed development’s roof runoff will be collected via a series of downspouts. These downspouts will connect to the proposed area drain system and provide an air gap for emergency overflow. The area drain system will be designed as part of the separately prepared Precise Grading Plan during final engineering.

11. Curb inlet catch basins sizing have been designed based on the 25-year peak flow rates.

AutoCAD Civil 3D Hydraflow Express, 2025 was utilized to develop the catch basin calculations. Refer to the Appendix C, Hydraulic Calculations for catch basin sizing.

12. 100-year water surface elevations at primary low-points throughout the site will be analyzed during final engineering to verify that finish floor elevations have been set at least 1’ above the depth of flow for the 100-year storm event.

13. Pipe Sizing will be analyzed using WSPG software to verify hydraulic grade line (HGL) based on the 100-year storm event peak flow rates and will be provided during final engineering for proposed onsite conveyance pipe.

Preliminary Hydrology Study
City of Yorba Linda, County of Orange
6 | P a g e
VII. Hydrology Analysis
A summary of the project site’s existing and proposed conditions peak runoff values generated from the project site has been provided below.

Hydrology Summary
Existing conditions generated runoff peak flowrate summary:

Pre-Development
Conditions Area (ac) Q25 (cfs) Q100 (cfs) Tc (min)
DMA X1 0.79 2.205 2.865 9.513
DMA X2 1.85 3.966 5.256 12.45
Total 2.64 6.172 8.122 12.45
Offsite Condition Generated runoff peak flowrate summary:

Offsite Condition Area (ac) Q25 (cfs) Q100 (cfs) Tc (min) DMA X3 (Offsite) 0.79 2.443 3.152 8.44
Proposed conditions generated runoff peak flowrate summary:

Post Development
Conditions Area (ac) Q25 (cfs) Q100 (cfs) Tc (min)
DMA P1 0.20 0.083 0.107 5.231
DMA P2 2.44 7.734 10.086 8.14
Total 2.64 7.817 10.192 8.14
The post development condition generates a higher peak flow rate because of the change in land use and increase in impervious coverage.

Hydrograph Flood Volume Routing
The hydrograph method per the Orange County Hydrology Manual 1986 was utilized to determine

Preliminary Hydrology Study
City of Yorba Linda, County of Orange
7 | P a g e
the required detention volume to preserve existing peak flow mitigation. Hydrographs were developed based on the existing and preliminary proposed conditions land use and time of concentrations (Tc) for design storm events peak flow rates and flood volumes. Proposed conditions hydrograph was utilized as input in routing analysis to determine the required detention volume and pump control mitigation.

Detention Routing Mitigated Runoff Drainage Summary
Q (cfs)
Existing conditions 25-year,
24 hour storm event peak flow 5.20
Existing conditions 100-year,
24 hour storm event peak flow 6.93
Proposed conditions 100-year,
24 hour storm event peak flow 6.99
Proposed conditions 100-year,
24 hour storm event detention
routing peak flow

2.00 Refer to Appendix B of this report for additional information.

Preliminary Hydrology Study
City of Yorba Linda, County of Orange
8 | P a g e
VIII. Hydraulic Analysis
Catch Basin/ Inlet Sizing
Catch basin Sizing will be analyzed for the 100-year storm event peak flow rates per Orange County Local Drainage Manual and will be provided during final engineering.

Pipe Sizing
Pipe Sizing will be analyzed using WSPG software to verify hydraulic grade line (HGL) based on the 100-year storm event peak flow rates and will be provided during final engineering for proposed onsite conveyance pipe.
100-Year Water Surface Elevation (WSE)
Water surface elevations for the 100-year storm event peak flow rates will verify that the proposed finish floor elevations are set at least 1’ above the water surface elevation and will be calculated and provided during final engineering.

Parkway Drain Sizing
Parkway Drain Sizing will be analyzed for the 100-year storm event peak flow rates per Orange County Local Drainage Manual and will be provided during final engineering.

Offsite Runon Channel Sizing
The offsite run-on channel has been analyzed for the 100-year storm event peak flow rates per Orange County Local Drainage Manual and is shown in Appendix C.

Preliminary Hydrology Study
City of Yorba Linda, County of Orange
9 | P a g e
IX. Conclusion
The results from this hydrology study demonstrate that the overall proposed development condition will generate a higher peak runoff flowrate; therefore, detention will be required per hydrology requirements.

In cases of storm events exceeding storm drain design parameters or emergency overflow, runoff will overflow via site lowest inlet near the frontage of the site and continue downstream following existing conditions.

X. References

1. Orange County Hydrology Manual, October 1986.

2. Exhibit 7.III. Technical Guidance Document (TGD) for the Preparation of Conceptual/Preliminary and/or Project Water Quality Management Plans (WQMPs). Santa Ana Regional Water Quality Control Board. December 20, 2013.

3. Federal Emergency Management Agency (FEMA) Flood Map. FEMA.

4. United States Department of Agriculture (USDA) Natural Resources Conservation Service, Soil Map.

5. AutoCAD Civil 3D Hydraflow Express Extension. Version 2022 Autodesk, Inc. Used for preliminary pipe sizing.

6. Tentative Tract Map No. 19389 prepared by C&V Consulting, Inc. dated March 2025

7. OCFCD Base Map of Drainage Facilities

Preliminary Hydrology Study
City of Yorba Linda, County of Orange

APPENDIX A
Maps and Exhibits

Preliminary Hydrology Study
City of Yorba Linda, County of Orange
Existing Conditions Hydrology Map

AHEADAHEADAHEAD

SIGNALSIGNALSIGNAL

Preliminary Hydrology Study
City of Yorba Linda, County of Orange
Proposed Conditions Hydrology Map

AHEADAHEADAHEAD

SIGNALSIGNALSIGNAL

Preliminary Hydrology Study
City of Yorba Linda, County of Orange
FEMA Flood Map

National Flood Hazard Layer FIRMette
0 250 500 1,000 1,500 2,000
Feet
Ü

SEE FIS REPORT FOR DETAILED LEGEND AND INDEX MAP FOR FIRM PANEL LAYOUT

SPECIAL FLOOD

HAZARD AREAS
Without Base Flood Elevation (BFE)
Zone A, V, A99
With BFE or DepthZone AE, AO, AH, VE, AR
Regulatory Floodway

0.2% Annual Chance Flood Hazard, Areas
of 1% annual chance flood with average
depth less than one foot or with drainage
areas of less than one square mileZone X
Future Conditions 1% Annual
Chance Flood HazardZone X
Area with Reduced Flood Risk due to
Levee. See Notes.Zone X
Area with Flood Risk due to LeveeZone D
NO SCREENArea of Minimal Flood Hazard Zone X
Area of Undetermined Flood HazardZone D
Channel, Culvert, or Storm Sewer
Levee, Dike, or Floodwall
Cross Sections with 1% Annual Chance

17.5 Water Surface Elevation
Coastal Transect
Coastal Transect Baseline
Profile Baseline
Hydrographic Feature
Base Flood Elevation Line (BFE)
Effective LOMRs
Limit of Study
Jurisdiction Boundary
Digital Data Available
No Digital Data Available
Unmapped
This map complies with FEMA's standards for the use of
digital flood maps if it is not void as described below.

The basemap shown complies with FEMA's basemap
accuracy standards
The flood hazard information is derived directly from the authoritative NFHL web services provided by FEMA. This map was exported on 4/25/2022 at 5:48 PM and does not
reflect changes or amendments subsequent to this date and time. The NFHL and effective information may change or
become superseded by new data over time.

This map image is void if the one or more of the following map elements do not appear: basemap imagery, flood zone labels, legend, scale bar, map creation date, community identifiers, FIRM panel number, and FIRM effective date. Map images for unmapped and unmodernized areas cannot be used for
regulatory purposes.

Legend

OTHER AREAS OF

FLOOD HAZARD

OTHER AREAS

GENERAL

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MAP PANELS
8 B

20.2 The pin displayed on the map is an approximate
point selected by the user and does not represent
an authoritative property location.
1:6,000
117°48'22"W 33°53'38"N
117°47'45"W 33°53'8"N
Basemap: USGS National Map: Orthoimagery: Data refreshed October, 2020

Preliminary Hydrology Study
City of Yorba Linda, County of Orange
Soil Map

Soil Map—Orange County and Part of Riverside County, California Natural Resources
Conservation Service
Web Soil Survey
National Cooperative Soil Survey
3/3/2025

3750100 3750120 3750140 3750160 3750180 3750200 3750220 3750240 3750260 3750280 3750300 3750320 3750100 3750120 3750140 3750160 3750180 3750200 3750220 3750240 3750260 3750280 3750300 3750320 425860 425880 425900 425920 425940 425960 425980 426000 426020 425860 425880 425900 425920 425940 425960 425980 426000 426020 33° 53' 26'' N
117° 48' 6'' W
33° 53' 26'' N
117° 47' 59'' W
33° 53' 18'' N
117° 48' 6'' W
33° 53' 18'' N
117° 47' 59'' W
N
Map projection: Web Mercator Corner coordinates: WGS84 Edge tics: UTM Zone 11N WGS84 0 50 100 200 300
Feet
0 15 30 60 90
Meters
Map Scale: 1:1,140 if printed on A portrait (8.5" x 11") sheet.

Soil Map may not be valid at this scale.

MAP LEGEND MAP INFORMATION
Area of Interest (AOI)
Area of Interest (AOI)
Soils
Soil Map Unit Polygons
Soil Map Unit Lines
Soil Map Unit Points
Special Point Features
Blowout
Borrow Pit
Clay Spot
Closed Depression
Gravel Pit
Gravelly Spot
Landfill
Lava Flow
Marsh or swamp
Mine or Quarry
Miscellaneous Water
Perennial Water
Rock Outcrop
Saline Spot
Sandy Spot
Severely Eroded Spot
Sinkhole
Slide or Slip
Sodic Spot
Spoil Area
Stony Spot
Very Stony Spot
Wet Spot
Other
Special Line Features
Water Features
Streams and Canals
Transportation
Rails
Interstate Highways
US Routes
Major Roads
Local Roads
Background
Aerial Photography
The soil surveys that comprise your AOI were mapped at
1:24,000.

Warning: Soil Map may not be valid at this scale.

Enlargement of maps beyond the scale of mapping can cause misunderstanding of the detail of mapping and accuracy of soil line placement. The maps do not show the small areas of contrasting soils that could have been shown at a more detailed scale.

Please rely on the bar scale on each map sheet for map
measurements.

Source of Map: Natural Resources Conservation Service
Web Soil Survey URL:

Coordinate System: Web Mercator (EPSG:3857)
Maps from the Web Soil Survey are based on the Web Mercator projection, which preserves direction and shape but distorts distance and area. A projection that preserves area, such as the Albers equal-area conic projection, should be used if more accurate calculations of distance or area are required.

This product is generated from the USDA-NRCS certified data as of the version date(s) listed below.

Soil Survey Area: Orange County and Part of Riverside County, California
Survey Area Data: Version 18, Aug 30, 2024
Soil map units are labeled (as space allows) for map scales 1:50,000 or larger.

Date(s) aerial images were photographed: Mar 14, 2022—Mar 17, 2022
The orthophoto or other base map on which the soil lines were compiled and digitized probably differs from the background imagery displayed on these maps. As a result, some minor shifting of map unit boundaries may be evident.

Soil Map—Orange County and Part of Riverside County, California Natural Resources
Conservation Service
Web Soil Survey
National Cooperative Soil Survey
3/3/2025

Map Unit Legend
Map Unit Symbol Map Unit Name Acres in AOI Percent of AOI 221 Yorba gravelly sandy loam, 2
to 9 percent slopes

2.7 100.0%
Totals for Area of Interest 2.7 100.0%
Soil Map—Orange County and Part of Riverside County, California Natural Resources
Conservation Service
Web Soil Survey
National Cooperative Soil Survey
3/3/2025

Orange County and Part of Riverside County,
California
221—Yorba gravelly sandy loam, 2 to 9 percent slopes
Map Unit Setting
National map unit symbol: hcq4
Elevation: 100 to 2,500 feet
Mean annual precipitation: 12 to 20 inches
Mean annual air temperature: 61 to 63 degrees F
Frost-free period: 300 to 350 days
Farmland classification: Not prime farmland
Map Unit Composition
Yorba and similar soils: 85 percent
Minor components: 15 percent
Estimates are based on observations, descriptions, and transects of the mapunit.

Description of Yorba
Setting
Landform: Terraces
Landform position (two-dimensional): Backslope
Landform position (three-dimensional): Riser
Down-slope shape: Concave
Across-slope shape: Convex
Parent material: Sandy and gravelly alluvium derived from mixed Typical profile
H1 - 0 to 11 inches: gravelly sandy loam
H2 - 11 to 40 inches: very gravelly sandy clay loam
H3 - 40 to 63 inches: very gravelly sandy loam
Properties and qualities
Slope: 2 to 9 percent
Depth to restrictive feature: More than 80 inches
Drainage class: Well drained
Runoff class: Very high
Capacity of the most limiting layer to transmit water
(Ksat): Moderately low to moderately high (0.06 to 0.20 in/hr) Depth to water table: More than 80 inches
Frequency of flooding: None
Frequency of ponding: None
Available water supply, 0 to 60 inches: Low (about 4.7 inches) Interpretive groups
Land capability classification (irrigated): 4e
Land capability classification (nonirrigated): 4e
Hydrologic Soil Group: C
Ecological site: R019XD061CA - CLAYPAN
Hydric soil rating: No
Map Unit Description: Yorba gravelly sandy loam, 2 to 9 percent slopes---Orange County and Part of Riverside County, California
Natural Resources
Conservation Service
Web Soil Survey
National Cooperative Soil Survey
3/3/2025

Minor Components
Myford, sandy loam
Percent of map unit: 5 percent
Hydric soil rating: No
Gabino, gravelly clay loam
Percent of map unit: 5 percent
Hydric soil rating: No
Soper, gravelly clay loam
Percent of map unit: 3 percent
Hydric soil rating: No
Modjeska, gravelly sandy loam
Percent of map unit: 2 percent
Hydric soil rating: No
Data Source Information
Soil Survey Area: Orange County and Part of Riverside County, California Survey Area Data: Version 18, Aug 30, 2024
Map Unit Description: Yorba gravelly sandy loam, 2 to 9 percent slopes---Orange County and Part of Riverside County, California
Natural Resources
Conservation Service
Web Soil Survey
National Cooperative Soil Survey
3/3/2025

Preliminary Hydrology Study
City of Yorba Linda, County of Orange

APPENDIX B
Hydrology Analysis

Preliminary Hydrology Study
City of Yorba Linda, County of Orange
Existing Conditions – Rational Method

Orange County Rational Hydrology Program
(Hydrology Manual Date(s) October 1986 & November 1996) CIVILCADD/CIVILDESIGN Engineering Software, (c) 1989-2018 Version 9.0 Rational Hydrology Study, Date: 03/04/25 File Name: CVN164X25.roc ------------------------------------------------------------------------ TTM 19389

YORBA LINDA
EXISTING Q25

PRELIMINARY
------------------------------------------------------------------------ Program License Serial Number 6677
------------------------------------------------------------------------ ********* Hydrology Study Control Information ********** ------------------------------------------------------------------------ Rational hydrology study storm event year is 25.0
Decimal fraction of study above 2000 ft., 600M = 0.0000 English Units Used for input data

++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Process from Point/Station 100.000 to Point/Station 101.000 **** INITIAL AREA EVALUATION ****
______________________________________________________________________ UNDEVELOPED (poor cover) subarea
Decimal fraction soil group A = 0.000
Decimal fraction soil group B = 0.000
Decimal fraction soil group C = 1.000
Decimal fraction soil group D = 0.000
SCS curve number for soil(AMC 2) = 86.00
Pervious ratio(Ap) = 1.0000 Max loss rate(Fp)= 0.250(In/Hr) Max Catchment Loss (Fm) = 0.250(In/Hr)
Initial subarea data:

Initial area flow distance = 266.600(Ft.)
Top (of initial area) elevation = 455.500(Ft.)
Bottom (of initial area) elevation = 445.800(Ft.)
Difference in elevation = 9.700(Ft.)
Slope = 0.03638 s(%)= 3.64
TC = k(0.525)*[(length^3)/(elevation change)]^0.2
Initial area time of concentration = 9.513 min.

Rainfall intensity = 3.352(In/Hr) for a 25.0 year storm

Effective runoff coefficient used for area (Q=KCIA) is C = 0.833 Subarea runoff = 2.205(CFS)
Total initial stream area = 0.790(Ac.)

++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Process from Point/Station 101.000 to Point/Station 102.000 **** IMPROVED CHANNEL TRAVEL TIME ****
______________________________________________________________________ Upstream point elevation = 445.800(Ft.)
Downstream point elevation = 437.700(Ft.)
Channel length thru subarea = 467.700(Ft.)
Channel base width = 10.000(Ft.)
Slope or 'Z' of left channel bank = 50.000
Slope or 'Z' of right channel bank = 50.000
Estimated mean flow rate at midpoint of channel = 4.230(CFS) Manning's 'N' = 0.015
Maximum depth of channel = 0.500(Ft.)
Flow(q) thru subarea = 4.230(CFS)
Depth of flow = 0.111(Ft.), Average velocity = 2.455(Ft/s) Channel flow top width = 21.086(Ft.)
Flow Velocity = 2.45(Ft/s)
Travel time = 3.18 min.

Time of concentration = 12.69 min.

Critical depth = 0.140(Ft.)
Adding area flow to channel
UNDEVELOPED (average cover) subarea
Decimal fraction soil group A = 0.000
Decimal fraction soil group B = 0.000
Decimal fraction soil group C = 1.000
Decimal fraction soil group D = 0.000
SCS curve number for soil(AMC 2) = 79.00
Pervious ratio(Ap) = 1.0000 Max loss rate(Fp)= 0.250(In/Hr) Max Catchment Loss (Fm) = 0.250(In/Hr)
Rainfall intensity = 2.848(In/Hr) for a 25.0 year storm Effective runoff coefficient used for area,(total area with modified rational method)(Q=KCIA) is C = 0.821
Subarea runoff = 3.966(CFS) for 1.850(Ac.)
Total runoff = 6.172(CFS) Total area = 2.64(Ac.)
Area averaged Fm value = 0.250(In/Hr)
Depth of flow = 0.135(Ft.), Average velocity = 2.735(Ft/s) Critical depth = 0.172(Ft.)
End of computations, total study area = 2.64 (Ac.)
The following figures may
be used for a unit hydrograph study of the same area.

Note: These figures do not consider reduced effective area effects caused by confluences in the rational equation.

Area averaged pervious area fraction(Ap) = 1.000

Area averaged SCS curve number (AMC 2) = 81.1

Orange County Rational Hydrology Program
(Hydrology Manual Date(s) October 1986 & November 1996) CIVILCADD/CIVILDESIGN Engineering Software, (c) 1989-2018 Version 9.0 Rational Hydrology Study, Date: 03/04/25 File Name: CVN164X100.roc ------------------------------------------------------------------------ TTM 19389

YORBA LINDA
EXISTING Q100

PRELIMINARY
------------------------------------------------------------------------ Program License Serial Number 6677
------------------------------------------------------------------------ ********* Hydrology Study Control Information ********** ------------------------------------------------------------------------ Rational hydrology study storm event year is 100.0
Decimal fraction of study above 2000 ft., 600M = 0.0000 English Units Used for input data

++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Process from Point/Station 100.000 to Point/Station 101.000 **** INITIAL AREA EVALUATION ****
______________________________________________________________________ UNDEVELOPED (poor cover) subarea
Decimal fraction soil group A = 0.000
Decimal fraction soil group B = 0.000
Decimal fraction soil group C = 1.000
Decimal fraction soil group D = 0.000
SCS curve number for soil(AMC 2) = 86.00
Pervious ratio(Ap) = 1.0000 Max loss rate(Fp)= 0.250(In/Hr) Max Catchment Loss (Fm) = 0.250(In/Hr)
Initial subarea data:

Initial area flow distance = 266.600(Ft.)
Top (of initial area) elevation = 455.500(Ft.)
Bottom (of initial area) elevation = 445.800(Ft.)
Difference in elevation = 9.700(Ft.)
Slope = 0.03638 s(%)= 3.64
TC = k(0.525)*[(length^3)/(elevation change)]^0.2
Initial area time of concentration = 9.513 min.

Rainfall intensity = 4.280(In/Hr) for a 100.0 year storm

Effective runoff coefficient used for area (Q=KCIA) is C = 0.847 Subarea runoff = 2.865(CFS)
Total initial stream area = 0.790(Ac.)

++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Process from Point/Station 101.000 to Point/Station 102.000 **** IMPROVED CHANNEL TRAVEL TIME ****
______________________________________________________________________ Upstream point elevation = 445.800(Ft.)
Downstream point elevation = 437.700(Ft.)
Channel length thru subarea = 467.700(Ft.)
Channel base width = 10.000(Ft.)
Slope or 'Z' of left channel bank = 50.000
Slope or 'Z' of right channel bank = 50.000
Estimated mean flow rate at midpoint of channel = 5.543(CFS) Manning's 'N' = 0.015
Maximum depth of channel = 0.500(Ft.)
Flow(q) thru subarea = 5.543(CFS)
Depth of flow = 0.128(Ft.), Average velocity = 2.653(Ft/s) Channel flow top width = 22.757(Ft.)
Flow Velocity = 2.65(Ft/s)
Travel time = 2.94 min.

Time of concentration = 12.45 min.

Critical depth = 0.162(Ft.)
Adding area flow to channel
UNDEVELOPED (average cover) subarea
Decimal fraction soil group A = 0.000
Decimal fraction soil group B = 0.000
Decimal fraction soil group C = 1.000
Decimal fraction soil group D = 0.000
SCS curve number for soil(AMC 2) = 79.00
Pervious ratio(Ap) = 1.0000 Max loss rate(Fp)= 0.250(In/Hr) Max Catchment Loss (Fm) = 0.250(In/Hr)
Rainfall intensity = 3.668(In/Hr) for a 100.0 year storm Effective runoff coefficient used for area,(total area with modified rational method)(Q=KCIA) is C = 0.839
Subarea runoff = 5.256(CFS) for 1.850(Ac.)
Total runoff = 8.122(CFS) Total area = 2.64(Ac.)
Area averaged Fm value = 0.250(In/Hr)
Depth of flow = 0.155(Ft.), Average velocity = 2.954(Ft/s) Critical depth = 0.197(Ft.)
End of computations, total study area = 2.64 (Ac.)
The following figures may
be used for a unit hydrograph study of the same area.

Note: These figures do not consider reduced effective area effects caused by confluences in the rational equation.

Area averaged pervious area fraction(Ap) = 1.000

Area averaged SCS curve number (AMC 2) = 81.1

Orange County Rational Hydrology Program
(Hydrology Manual Date(s) October 1986 & November 1996) CIVILCADD/CIVILDESIGN Engineering Software, (c) 1989-2018 Version 9.0 Rational Hydrology Study, Date: 03/04/25 File Name: CVN164X25.roc ------------------------------------------------------------------------ TTM 19389

YORBA LINDA
OFFSITE EXISTING Q25

PRELIMINARY
------------------------------------------------------------------------ Program License Serial Number 6677
------------------------------------------------------------------------ ********* Hydrology Study Control Information ********** ------------------------------------------------------------------------ Rational hydrology study storm event year is 25.0
Decimal fraction of study above 2000 ft., 600M = 0.0000 English Units Used for input data

++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Process from Point/Station 200.000 to Point/Station 201.000 **** INITIAL AREA EVALUATION ****
______________________________________________________________________ RESIDENTIAL(3 - 4 dwl/acre)
Decimal fraction soil group A = 0.000
Decimal fraction soil group B = 0.000
Decimal fraction soil group C = 1.000
Decimal fraction soil group D = 0.000
SCS curve number for soil(AMC 2) = 69.00
Pervious ratio(Ap) = 0.6000 Max loss rate(Fp)= 0.250(In/Hr) Max Catchment Loss (Fm) = 0.150(In/Hr)
Initial subarea data:

Initial area flow distance = 349.400(Ft.)
Top (of initial area) elevation = 463.000(Ft.)
Bottom (of initial area) elevation = 451.200(Ft.)
Difference in elevation = 11.800(Ft.)
Slope = 0.03377 s(%)= 3.38
TC = k(0.412)*[(length^3)/(elevation change)]^0.2
Initial area time of concentration = 8.443 min.

NOTE: Distance EXCEEDS recommended maximum value of 328.084(Ft.)

for this Development Type
Rainfall intensity = 3.586(In/Hr) for a 25.0 year storm Effective runoff coefficient used for area (Q=KCIA) is C = 0.862 Subarea runoff = 2.443(CFS)
Total initial stream area = 0.790(Ac.)

++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Process from Point/Station 201.000 to Point/Station 202.000 **** IMPROVED CHANNEL TRAVEL TIME ****
______________________________________________________________________ Upstream point elevation = 451.200(Ft.)
Downstream point elevation = 437.700(Ft.)
Channel length thru subarea = 611.320(Ft.)
Channel base width = 2.000(Ft.)
Slope or 'Z' of left channel bank = 50.000
Slope or 'Z' of right channel bank = 50.000
Manning's 'N' = 0.015
Maximum depth of channel = 0.500(Ft.)
Flow(q) thru subarea = 2.443(CFS)
Depth of flow = 0.122(Ft.), Average velocity = 2.486(Ft/s) Channel flow top width = 14.162(Ft.)
Flow Velocity = 2.49(Ft/s)
Travel time = 4.10 min.

Time of concentration = 12.54 min.

Critical depth = 0.152(Ft.)
End of computations, total study area = 0.79 (Ac.)
The following figures may
be used for a unit hydrograph study of the same area.

Note: These figures do not consider reduced effective area effects caused by confluences in the rational equation.

Area averaged pervious area fraction(Ap) = 0.600
Area averaged SCS curve number (AMC 2) = 69.0

Orange County Rational Hydrology Program
(Hydrology Manual Date(s) October 1986 & November 1996) CIVILCADD/CIVILDESIGN Engineering Software, (c) 1989-2018 Version 9.0 Rational Hydrology Study, Date: 03/04/25 File Name: CVN164X100.roc ------------------------------------------------------------------------ TTM 19389

YORBA LINDA
OFFSITE EXISTING Q100

PRELIMINARY
------------------------------------------------------------------------ Program License Serial Number 6677
------------------------------------------------------------------------ ********* Hydrology Study Control Information ********** ------------------------------------------------------------------------ Rational hydrology study storm event year is 100.0
Decimal fraction of study above 2000 ft., 600M = 0.0000 English Units Used for input data

++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Process from Point/Station 200.000 to Point/Station 201.000 **** INITIAL AREA EVALUATION ****
______________________________________________________________________ SCS curve number for soil(AMC 2) = 69.00
Pervious ratio(Ap) = 0.6000 Max loss rate(Fp)= 0.250(In/Hr) Max Catchment Loss (Fm) = 0.150(In/Hr)
Initial subarea data:

Initial area flow distance = 349.400(Ft.)
Top (of initial area) elevation = 463.000(Ft.)
Bottom (of initial area) elevation = 451.200(Ft.)
Difference in elevation = 11.800(Ft.)
Slope = 0.03377 s(%)= 3.38
TC = k(0.412)*[(length^3)/(elevation change)]^0.2
Initial area time of concentration = 8.443 min.

NOTE: Distance EXCEEDS recommended maximum value of 328.084(Ft.) for this Development Type
Rainfall intensity = 4.583(In/Hr) for a 100.0 year storm Effective runoff coefficient used for area (Q=KCIA) is C = 0.871 Subarea runoff = 3.152(CFS)
Total initial stream area = 0.790(Ac.)

++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Process from Point/Station 201.000 to Point/Station 202.000 **** IMPROVED CHANNEL TRAVEL TIME ****
______________________________________________________________________ Upstream point elevation = 451.200(Ft.)
Downstream point elevation = 437.700(Ft.)
Channel length thru subarea = 611.320(Ft.)
Channel base width = 2.000(Ft.)
Slope or 'Z' of left channel bank = 50.000
Slope or 'Z' of right channel bank = 50.000
Manning's 'N' = 0.015
Maximum depth of channel = 0.500(Ft.)
Flow(q) thru subarea = 3.152(CFS)
Depth of flow = 0.135(Ft.), Average velocity = 2.651(Ft/s) Channel flow top width = 15.548(Ft.)
Flow Velocity = 2.65(Ft/s)
Travel time = 3.84 min.

Time of concentration = 12.29 min.

Critical depth = 0.172(Ft.)
End of computations, total study area = 0.79 (Ac.)
The following figures may
be used for a unit hydrograph study of the same area.

Note: These figures do not consider reduced effective area effects caused by confluences in the rational equation.

Area averaged pervious area fraction(Ap) = 0.600
Area averaged SCS curve number (AMC 2) = 69.0

Preliminary Hydrology Study
City of Yorba Linda, County of Orange
Proposed Conditions – Rational Method

Orange County Rational Hydrology Program
(Hydrology Manual Date(s) October 1986 & November 1996) CIVILCADD/CIVILDESIGN Engineering Software, (c) 1989-2018 Version 9.0 Rational Hydrology Study, Date: 03/04/25 File Name: CVN164P25.roc ------------------------------------------------------------------------ TTM 19389

YORBA LINDA
PROPOSED Q25

PRELIMINARY
------------------------------------------------------------------------ Program License Serial Number 6677
------------------------------------------------------------------------ ********* Hydrology Study Control Information ********** ------------------------------------------------------------------------ Rational hydrology study storm event year is 25.0
Decimal fraction of study above 2000 ft., 600M = 0.0000 English Units Used for input data

++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Process from Point/Station 100.000 to Point/Station 101.000 **** INITIAL AREA EVALUATION ****
______________________________________________________________________ CONDOMINIUM subarea type
Decimal fraction soil group A = 0.000
Decimal fraction soil group B = 0.000
Decimal fraction soil group C = 1.000
Decimal fraction soil group D = 0.000
SCS curve number for soil(AMC 2) = 69.00
Pervious ratio(Ap) = 0.3500 Max loss rate(Fp)= 0.250(In/Hr) Max Catchment Loss (Fm) = 0.087(In/Hr)
Initial subarea data:

Initial area flow distance = 83.550(Ft.)
Top (of initial area) elevation = 449.600(Ft.)
Bottom (of initial area) elevation = 448.700(Ft.)
Difference in elevation = 0.900(Ft.)
Slope = 0.01077 s(%)= 1.08
TC = k(0.360)*[(length^3)/(elevation change)]^0.2
Initial area time of concentration = 5.231 min.

Rainfall intensity = 4.702(In/Hr) for a 25.0 year storm

Effective runoff coefficient used for area (Q=KCIA) is C = 0.883 Subarea runoff = 0.083(CFS)
Total initial stream area = 0.020(Ac.)

++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Process from Point/Station 101.000 to Point/Station 102.000 **** STREET FLOW TRAVEL TIME + SUBAREA FLOW ADDITION **** ______________________________________________________________________ Top of street segment elevation = 448.700(Ft.)
End of street segment elevation = 438.400(Ft.)
Length of street segment = 508.700(Ft.)
Height of curb above gutter flowline = 6.0(In.)
Width of half street (curb to crown) = 24.000(Ft.)
Distance from crown to crossfall grade break = 22.500(Ft.) Slope from gutter to grade break (v/hz) = 0.020
Slope from grade break to crown (v/hz) = 0.020
Street flow is on [2] side(s) of the street
Distance from curb to property line = 5.000(Ft.)
Slope from curb to property line (v/hz) = 0.025
Gutter width = 1.500(Ft.)
Gutter hike from flowline = 0.125(In.)
Manning's N in gutter = 0.0130
Manning's N from gutter to grade break = 0.0150
Manning's N from grade break to crown = 0.0150
Estimated mean flow rate at midpoint of street = 3.860(CFS) Depth of flow = 0.151(Ft.), Average velocity = 2.723(Ft/s) Streetflow hydraulics at midpoint of street travel:

Halfstreet flow width = 8.505(Ft.)
Flow velocity = 2.72(Ft/s)
Travel time = 3.11 min. TC = 8.34 min.

Adding area flow to street
CONDOMINIUM subarea type
Decimal fraction soil group A = 0.000
Decimal fraction soil group B = 0.000
Decimal fraction soil group C = 1.000
Decimal fraction soil group D = 0.000
SCS curve number for soil(AMC 2) = 69.00
Pervious ratio(Ap) = 0.3500 Max loss rate(Fp)= 0.250(In/Hr) Max Catchment Loss (Fm) = 0.087(In/Hr)
Rainfall intensity = 3.610(In/Hr) for a 25.0 year storm Effective runoff coefficient used for area,(total area with modified rational method)(Q=KCIA) is C = 0.878
Subarea runoff = 7.734(CFS) for 2.446(Ac.)
Total runoff = 7.817(CFS) Total area = 2.47(Ac.)
Area averaged Fm value = 0.087(In/Hr)
Street flow at end of street = 7.817(CFS)
Half street flow at end of street = 3.909(CFS)
Depth of flow = 0.201(Ft.), Average velocity = 3.242(Ft/s)

Flow width (from curb towards crown)= 11.047(Ft.)
End of computations, total study area = 2.47 (Ac.)
The following figures may
be used for a unit hydrograph study of the same area.

Note: These figures do not consider reduced effective area effects caused by confluences in the rational equation.

Area averaged pervious area fraction(Ap) = 0.350
Area averaged SCS curve number (AMC 2) = 69.0

Orange County Rational Hydrology Program
(Hydrology Manual Date(s) October 1986 & November 1996) CIVILCADD/CIVILDESIGN Engineering Software, (c) 1989-2018 Version 9.0 Rational Hydrology Study, Date: 03/04/25 File Name: CVN164P100.roc ------------------------------------------------------------------------ TTM 19389

YORBA LINDA
PROPOSEDQ100

PRELIMINARY
------------------------------------------------------------------------ Program License Serial Number 6677
------------------------------------------------------------------------ ********* Hydrology Study Control Information ********** ------------------------------------------------------------------------ Rational hydrology study storm event year is 100.0
Decimal fraction of study above 2000 ft., 600M = 0.0000 English Units Used for input data

++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Process from Point/Station 100.000 to Point/Station 101.000 **** INITIAL AREA EVALUATION ****
______________________________________________________________________ CONDOMINIUM subarea type
Decimal fraction soil group A = 0.000
Decimal fraction soil group B = 0.000
Decimal fraction soil group C = 1.000
Decimal fraction soil group D = 0.000
SCS curve number for soil(AMC 2) = 69.00
Pervious ratio(Ap) = 0.3500 Max loss rate(Fp)= 0.250(In/Hr) Max Catchment Loss (Fm) = 0.087(In/Hr)
Initial subarea data:

Initial area flow distance = 83.550(Ft.)
Top (of initial area) elevation = 449.600(Ft.)
Bottom (of initial area) elevation = 448.700(Ft.)
Difference in elevation = 0.900(Ft.)
Slope = 0.01077 s(%)= 1.08
TC = k(0.360)*[(length^3)/(elevation change)]^0.2
Initial area time of concentration = 5.231 min.

Rainfall intensity = 6.029(In/Hr) for a 100.0 year storm

Effective runoff coefficient used for area (Q=KCIA) is C = 0.887 Subarea runoff = 0.107(CFS)
Total initial stream area = 0.020(Ac.)

++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Process from Point/Station 101.000 to Point/Station 102.000 **** STREET FLOW TRAVEL TIME + SUBAREA FLOW ADDITION **** ______________________________________________________________________ Top of street segment elevation = 448.700(Ft.)
End of street segment elevation = 438.400(Ft.)
Length of street segment = 508.700(Ft.)
Height of curb above gutter flowline = 6.0(In.)
Width of half street (curb to crown) = 24.000(Ft.)
Distance from crown to crossfall grade break = 22.500(Ft.) Slope from gutter to grade break (v/hz) = 0.020
Slope from grade break to crown (v/hz) = 0.020
Street flow is on [2] side(s) of the street
Distance from curb to property line = 5.000(Ft.)
Slope from curb to property line (v/hz) = 0.025
Gutter width = 1.500(Ft.)
Gutter hike from flowline = 0.125(In.)
Manning's N in gutter = 0.0130
Manning's N from gutter to grade break = 0.0150
Manning's N from grade break to crown = 0.0150
Estimated mean flow rate at midpoint of street = 5.089(CFS) Depth of flow = 0.169(Ft.), Average velocity = 2.916(Ft/s) Streetflow hydraulics at midpoint of street travel:

Halfstreet flow width = 9.420(Ft.)
Flow velocity = 2.92(Ft/s)
Travel time = 2.91 min. TC = 8.14 min.

Adding area flow to street
CONDOMINIUM subarea type
Decimal fraction soil group A = 0.000
Decimal fraction soil group B = 0.000
Decimal fraction soil group C = 1.000
Decimal fraction soil group D = 0.000
SCS curve number for soil(AMC 2) = 69.00
Pervious ratio(Ap) = 0.3500 Max loss rate(Fp)= 0.250(In/Hr) Max Catchment Loss (Fm) = 0.087(In/Hr)
Rainfall intensity = 4.680(In/Hr) for a 100.0 year storm Effective runoff coefficient used for area,(total area with modified rational method)(Q=KCIA) is C = 0.883
Subarea runoff = 10.086(CFS) for 2.446(Ac.)
Total runoff = 10.192(CFS) Total area = 2.47(Ac.)
Area averaged Fm value = 0.087(In/Hr)
Street flow at end of street = 10.192(CFS)
Half street flow at end of street = 5.096(CFS)
Depth of flow = 0.224(Ft.), Average velocity = 3.462(Ft/s)

Flow width (from curb towards crown)= 12.194(Ft.)
End of computations, total study area = 2.47 (Ac.)
The following figures may
be used for a unit hydrograph study of the same area.

Note: These figures do not consider reduced effective area effects caused by confluences in the rational equation.

Area averaged pervious area fraction(Ap) = 0.350
Area averaged SCS curve number (AMC 2) = 69.0

Preliminary Hydrology Study
City of Yorba Linda, County of Orange

APPENDIX C
Hydrograph Analysis

U n i t H y d r o g r a p h A n a l y s i s
Copyright (c) CIVILCADD/CIVILDESIGN, 1989-2018, Version 9.0 Study date 03/11/25 File Name cv164x25.out
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ ------------------------------------------------------------------------ Orange County Unit Hydrograph Hydrology Method
Manual Date(s) - October 1986, November 1996
Program License Serial Number 6677
--------------------------------------------------------------------- TTM 19389

YORBA LINDA
EXISTING Q25

PRELIMINARY
-------------------------------------------------------------------- Storm Event Year = 25
Antecedent Moisture Condition = 2
English (in-lb) Input Units Used
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ ******** Area-averaged max loss rate, Fm ********
SCS curve Area Area Soil Fp Ap Fm
No.(AMCII) (Ac.) Fraction Group (In/Hr) (dec.) (In/Hr)

86.0 2.6 1.00 C 0.250 0.150 0.037
Area-averaged adjusted loss rate Fm (In/Hr) = 0.037
********* Area-Averaged low loss rate fraction, Yb ********** Area Area SCS CN SCS CN S Pervious
(Ac.) Fract (AMC2) (AMC2) Yield Fr

0.40 0.150 86.0 86.0 1.63 0.692

2.24 0.850 98.0 98.0 0.20 0.952
Area-averaged catchment yield fraction, Y = 0.913
Area-averaged low loss fraction, Yb = 0.087
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

User entry of time of concentration = 0.212 (hours)
Watershed area = 2.64(Ac.)
Catchment Lag time = 0.169 hours
Unit interval = 5.000 minutes
Unit interval percentage of lag time = 49.2514
Hydrograph baseflow = 0.00(CFS)
Average maximum watershed loss rate(Fm) = 0.250(In/Hr)
Average low loss rate fraction (Yb) = 0.087 (decimal)
Note: user entry of the Fm value
VALLEY DEVELOPED S-Graph Selected
Computed peak 5-minute rainfall = 0.307(In)
Computed peak 30-minute rainfall = 0.730(In)
Specified peak 1-hour rainfall = 1.030(In)
Computed peak 3-hour rainfall = 1.790(In)
Specified peak 6-hour rainfall = 2.560(In)
Specified peak 24-hour rainfall = 4.980(In)
Note: user specified rainfall values used.

Rainfall depth area reduction factors:

Using a total area of 2.64(Ac.) (Ref: fig. E-4)
5-minute factor = 1.000 Adjusted rainfall = 0.307(In)
30-minute factor = 1.000 Adjusted rainfall = 0.730(In)
1-hour factor = 1.000 Adjusted rainfall = 1.030(In)
3-hour factor = 1.000 Adjusted rainfall = 1.790(In)
6-hour factor = 1.000 Adjusted rainfall = 2.560(In)
24-hour factor = 1.000 Adjusted rainfall = 4.980(In)
--------------------------------------------------------------------- U n i t H y d r o g r a p h
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Interval 'S' Graph Unit Hydrograph
Number Mean values ((CFS))
--------------------------------------------------------------------- (K = 31.93 (CFS))
1 4.448 1.420
2 28.958 7.825
3 67.606 12.339
4 89.284 6.921
5 96.769 2.390
6 98.676 0.609
7 99.559 0.282
8 100.000 0.141
--------------------------------------------------------------------- Peak Unit Adjusted mass rainfall Unit rainfall
Number (In) (In)
1 0.3070 0.3070
2 0.4292 0.1222

3 0.5221 0.0929
4 0.6000 0.0779
5 0.6683 0.0683
6 0.7299 0.0616
7 0.7880 0.0581
8 0.8420 0.0540
9 0.8927 0.0507
10 0.9407 0.0480
11 0.9863 0.0456
12 1.0299 0.0436
13 1.0722 0.0423
14 1.1129 0.0407
15 1.1522 0.0393
16 1.1903 0.0380
17 1.2271 0.0369
18 1.2629 0.0358
19 1.2978 0.0348
20 1.3317 0.0339
21 1.3648 0.0331
22 1.3971 0.0323
23 1.4287 0.0316
24 1.4596 0.0309
25 1.4899 0.0303
26 1.5196 0.0297
27 1.5488 0.0291
28 1.5774 0.0286
29 1.6055 0.0281
30 1.6331 0.0276
31 1.6602 0.0272
32 1.6870 0.0267
33 1.7133 0.0263
34 1.7392 0.0259
35 1.7648 0.0256
36 1.7900 0.0252
37 1.8155 0.0255
38 1.8406 0.0252
39 1.8655 0.0248
40 1.8900 0.0245
41 1.9143 0.0242
42 1.9382 0.0240
43 1.9619 0.0237
44 1.9853 0.0234
45 2.0085 0.0232
46 2.0314 0.0229
47 2.0541 0.0227
48 2.0765 0.0224
49 2.0988 0.0222
50 2.1208 0.0220
51 2.1425 0.0218
52 2.1641 0.0216

53 2.1855 0.0214
54 2.2067 0.0212
55 2.2277 0.0210
56 2.2485 0.0208
57 2.2692 0.0206
58 2.2896 0.0205
59 2.3099 0.0203
60 2.3300 0.0201
61 2.3500 0.0200
62 2.3698 0.0198
63 2.3895 0.0197
64 2.4090 0.0195
65 2.4283 0.0194
66 2.4475 0.0192
67 2.4666 0.0191
68 2.4856 0.0189
69 2.5044 0.0188
70 2.5230 0.0187
71 2.5416 0.0185
72 2.5600 0.0184
73 2.5770 0.0170
74 2.5939 0.0169
75 2.6106 0.0168
76 2.6273 0.0167
77 2.6438 0.0165
78 2.6602 0.0164
79 2.6766 0.0163
80 2.6928 0.0162
81 2.7089 0.0161
82 2.7249 0.0160
83 2.7408 0.0159
84 2.7566 0.0158
85 2.7723 0.0157
86 2.7879 0.0156
87 2.8034 0.0155
88 2.8188 0.0154
89 2.8342 0.0153
90 2.8494 0.0152
91 2.8646 0.0152
92 2.8796 0.0151
93 2.8946 0.0150
94 2.9095 0.0149
95 2.9243 0.0148
96 2.9391 0.0147
97 2.9537 0.0147
98 2.9683 0.0146
99 2.9828 0.0145
100 2.9972 0.0144
101 3.0116 0.0143
102 3.0258 0.0143

103 3.0400 0.0142
104 3.0542 0.0141
105 3.0682 0.0141
106 3.0822 0.0140
107 3.0961 0.0139
108 3.1100 0.0139
109 3.1238 0.0138
110 3.1375 0.0137
111 3.1512 0.0137
112 3.1648 0.0136
113 3.1783 0.0135
114 3.1918 0.0135
115 3.2052 0.0134
116 3.2185 0.0133
117 3.2318 0.0133
118 3.2450 0.0132
119 3.2582 0.0132
120 3.2713 0.0131
121 3.2844 0.0131
122 3.2974 0.0130
123 3.3103 0.0129
124 3.3232 0.0129
125 3.3361 0.0128
126 3.3489 0.0128
127 3.3616 0.0127
128 3.3743 0.0127
129 3.3869 0.0126
130 3.3995 0.0126
131 3.4120 0.0125
132 3.4245 0.0125
133 3.4369 0.0124
134 3.4493 0.0124
135 3.4616 0.0123
136 3.4739 0.0123
137 3.4861 0.0122
138 3.4983 0.0122
139 3.5105 0.0121
140 3.5226 0.0121
141 3.5346 0.0121
142 3.5466 0.0120
143 3.5586 0.0120
144 3.5705 0.0119
145 3.5824 0.0119
146 3.5942 0.0118
147 3.6060 0.0118
148 3.6178 0.0118
149 3.6295 0.0117
150 3.6412 0.0117
151 3.6528 0.0116
152 3.6644 0.0116

153 3.6760 0.0116
154 3.6875 0.0115
155 3.6989 0.0115
156 3.7104 0.0114
157 3.7218 0.0114
158 3.7331 0.0114
159 3.7445 0.0113
160 3.7557 0.0113
161 3.7670 0.0112
162 3.7782 0.0112
163 3.7894 0.0112
164 3.8005 0.0111
165 3.8116 0.0111
166 3.8227 0.0111
167 3.8337 0.0110
168 3.8447 0.0110
169 3.8557 0.0110
170 3.8666 0.0109
171 3.8775 0.0109
172 3.8884 0.0109
173 3.8992 0.0108
174 3.9100 0.0108
175 3.9208 0.0108
176 3.9316 0.0107
177 3.9423 0.0107
178 3.9529 0.0107
179 3.9636 0.0106
180 3.9742 0.0106
181 3.9848 0.0106
182 3.9953 0.0106
183 4.0059 0.0105
184 4.0163 0.0105
185 4.0268 0.0105
186 4.0372 0.0104
187 4.0476 0.0104
188 4.0580 0.0104
189 4.0684 0.0103
190 4.0787 0.0103
191 4.0890 0.0103
192 4.0992 0.0103
193 4.1095 0.0102
194 4.1197 0.0102
195 4.1299 0.0102
196 4.1400 0.0102
197 4.1501 0.0101
198 4.1602 0.0101
199 4.1703 0.0101
200 4.1804 0.0100
201 4.1904 0.0100
202 4.2004 0.0100

203 4.2103 0.0100
204 4.2203 0.0099
205 4.2302 0.0099
206 4.2401 0.0099
207 4.2500 0.0099
208 4.2598 0.0098
209 4.2696 0.0098
210 4.2794 0.0098
211 4.2892 0.0098
212 4.2989 0.0097
213 4.3086 0.0097
214 4.3183 0.0097
215 4.3280 0.0097
216 4.3377 0.0097
217 4.3473 0.0096
218 4.3569 0.0096
219 4.3665 0.0096
220 4.3760 0.0096
221 4.3856 0.0095
222 4.3951 0.0095
223 4.4046 0.0095
224 4.4141 0.0095
225 4.4235 0.0094
226 4.4329 0.0094
227 4.4423 0.0094
228 4.4517 0.0094
229 4.4611 0.0094
230 4.4704 0.0093
231 4.4797 0.0093
232 4.4890 0.0093
233 4.4983 0.0093
234 4.5076 0.0093
235 4.5168 0.0092
236 4.5260 0.0092
237 4.5352 0.0092
238 4.5444 0.0092
239 4.5536 0.0092
240 4.5627 0.0091
241 4.5718 0.0091
242 4.5809 0.0091
243 4.5900 0.0091
244 4.5990 0.0091
245 4.6081 0.0090
246 4.6171 0.0090
247 4.6261 0.0090
248 4.6351 0.0090
249 4.6440 0.0090
250 4.6530 0.0089
251 4.6619 0.0089
252 4.6708 0.0089

253 4.6797 0.0089
254 4.6886 0.0089
255 4.6974 0.0089
256 4.7062 0.0088
257 4.7151 0.0088
258 4.7239 0.0088
259 4.7326 0.0088
260 4.7414 0.0088
261 4.7501 0.0087
262 4.7589 0.0087
263 4.7676 0.0087
264 4.7763 0.0087
265 4.7849 0.0087
266 4.7936 0.0087
267 4.8023 0.0086
268 4.8109 0.0086
269 4.8195 0.0086
270 4.8281 0.0086
271 4.8366 0.0086
272 4.8452 0.0086
273 4.8538 0.0085
274 4.8623 0.0085
275 4.8708 0.0085
276 4.8793 0.0085
277 4.8878 0.0085
278 4.8962 0.0085
279 4.9047 0.0084
280 4.9131 0.0084
281 4.9215 0.0084
282 4.9299 0.0084
283 4.9383 0.0084
284 4.9467 0.0084
285 4.9550 0.0084
286 4.9634 0.0083
287 4.9717 0.0083
288 4.9800 0.0083
--------------------------------------------------------------------- Unit Unit Unit Effective
Period Rainfall Soil-Loss Rainfall
(number) (In) (In) (In)
--------------------------------------------------------------------- 1 0.0083 0.0007 0.0076
2 0.0083 0.0007 0.0076
3 0.0084 0.0007 0.0076
4 0.0084 0.0007 0.0076
5 0.0084 0.0007 0.0077
6 0.0084 0.0007 0.0077
7 0.0084 0.0007 0.0077
8 0.0085 0.0007 0.0077
9 0.0085 0.0007 0.0078

10 0.0085 0.0007 0.0078
11 0.0085 0.0007 0.0078
12 0.0086 0.0007 0.0078
13 0.0086 0.0007 0.0078
14 0.0086 0.0007 0.0079
15 0.0086 0.0007 0.0079
16 0.0087 0.0007 0.0079
17 0.0087 0.0008 0.0079
18 0.0087 0.0008 0.0080
19 0.0087 0.0008 0.0080
20 0.0088 0.0008 0.0080
21 0.0088 0.0008 0.0080
22 0.0088 0.0008 0.0081
23 0.0089 0.0008 0.0081
24 0.0089 0.0008 0.0081
25 0.0089 0.0008 0.0081
26 0.0089 0.0008 0.0082
27 0.0090 0.0008 0.0082
28 0.0090 0.0008 0.0082
29 0.0090 0.0008 0.0082
30 0.0090 0.0008 0.0083
31 0.0091 0.0008 0.0083
32 0.0091 0.0008 0.0083
33 0.0091 0.0008 0.0083
34 0.0092 0.0008 0.0084
35 0.0092 0.0008 0.0084
36 0.0092 0.0008 0.0084
37 0.0093 0.0008 0.0085
38 0.0093 0.0008 0.0085
39 0.0093 0.0008 0.0085
40 0.0093 0.0008 0.0085
41 0.0094 0.0008 0.0086
42 0.0094 0.0008 0.0086
43 0.0094 0.0008 0.0086
44 0.0095 0.0008 0.0087
45 0.0095 0.0008 0.0087
46 0.0095 0.0008 0.0087
47 0.0096 0.0008 0.0088
48 0.0096 0.0008 0.0088
49 0.0097 0.0008 0.0088
50 0.0097 0.0008 0.0088
51 0.0097 0.0008 0.0089
52 0.0097 0.0008 0.0089
53 0.0098 0.0008 0.0089
54 0.0098 0.0008 0.0090
55 0.0099 0.0009 0.0090
56 0.0099 0.0009 0.0090
57 0.0099 0.0009 0.0091
58 0.0100 0.0009 0.0091
59 0.0100 0.0009 0.0092

60 0.0100 0.0009 0.0092
61 0.0101 0.0009 0.0092
62 0.0101 0.0009 0.0092
63 0.0102 0.0009 0.0093
64 0.0102 0.0009 0.0093
65 0.0103 0.0009 0.0094
66 0.0103 0.0009 0.0094
67 0.0103 0.0009 0.0095
68 0.0104 0.0009 0.0095
69 0.0104 0.0009 0.0095
70 0.0105 0.0009 0.0096
71 0.0105 0.0009 0.0096
72 0.0106 0.0009 0.0096
73 0.0106 0.0009 0.0097
74 0.0106 0.0009 0.0097
75 0.0107 0.0009 0.0098
76 0.0107 0.0009 0.0098
77 0.0108 0.0009 0.0099
78 0.0108 0.0009 0.0099
79 0.0109 0.0009 0.0100
80 0.0109 0.0009 0.0100
81 0.0110 0.0010 0.0100
82 0.0110 0.0010 0.0101
83 0.0111 0.0010 0.0101
84 0.0111 0.0010 0.0102
85 0.0112 0.0010 0.0102
86 0.0112 0.0010 0.0103
87 0.0113 0.0010 0.0103
88 0.0114 0.0010 0.0104
89 0.0114 0.0010 0.0104
90 0.0115 0.0010 0.0105
91 0.0116 0.0010 0.0106
92 0.0116 0.0010 0.0106
93 0.0117 0.0010 0.0107
94 0.0117 0.0010 0.0107
95 0.0118 0.0010 0.0108
96 0.0118 0.0010 0.0108
97 0.0119 0.0010 0.0109
98 0.0120 0.0010 0.0109
99 0.0121 0.0010 0.0110
100 0.0121 0.0010 0.0111
101 0.0122 0.0011 0.0111
102 0.0122 0.0011 0.0112
103 0.0123 0.0011 0.0113
104 0.0124 0.0011 0.0113
105 0.0125 0.0011 0.0114
106 0.0125 0.0011 0.0114
107 0.0126 0.0011 0.0115
108 0.0127 0.0011 0.0116
109 0.0128 0.0011 0.0117

110 0.0128 0.0011 0.0117
111 0.0129 0.0011 0.0118
112 0.0130 0.0011 0.0119
113 0.0131 0.0011 0.0120
114 0.0132 0.0011 0.0120
115 0.0133 0.0012 0.0121
116 0.0133 0.0012 0.0122
117 0.0135 0.0012 0.0123
118 0.0135 0.0012 0.0124
119 0.0137 0.0012 0.0125
120 0.0137 0.0012 0.0125
121 0.0139 0.0012 0.0127
122 0.0139 0.0012 0.0127
123 0.0141 0.0012 0.0128
124 0.0141 0.0012 0.0129
125 0.0143 0.0012 0.0130
126 0.0143 0.0012 0.0131
127 0.0145 0.0013 0.0132
128 0.0146 0.0013 0.0133
129 0.0147 0.0013 0.0135
130 0.0148 0.0013 0.0135
131 0.0150 0.0013 0.0137
132 0.0151 0.0013 0.0138
133 0.0152 0.0013 0.0139
134 0.0153 0.0013 0.0140
135 0.0155 0.0013 0.0142
136 0.0156 0.0014 0.0143
137 0.0158 0.0014 0.0144
138 0.0159 0.0014 0.0145
139 0.0161 0.0014 0.0147
140 0.0162 0.0014 0.0148
141 0.0164 0.0014 0.0150
142 0.0165 0.0014 0.0151
143 0.0168 0.0015 0.0153
144 0.0169 0.0015 0.0154
145 0.0184 0.0016 0.0168
146 0.0185 0.0016 0.0169
147 0.0188 0.0016 0.0172
148 0.0189 0.0016 0.0173
149 0.0192 0.0017 0.0176
150 0.0194 0.0017 0.0177
151 0.0197 0.0017 0.0180
152 0.0198 0.0017 0.0181
153 0.0201 0.0017 0.0184
154 0.0203 0.0018 0.0185
155 0.0206 0.0018 0.0189
156 0.0208 0.0018 0.0190
157 0.0212 0.0018 0.0194
158 0.0214 0.0019 0.0195
159 0.0218 0.0019 0.0199

160 0.0220 0.0019 0.0201
161 0.0224 0.0019 0.0205
162 0.0227 0.0020 0.0207
163 0.0232 0.0020 0.0212
164 0.0234 0.0020 0.0214
165 0.0240 0.0021 0.0219
166 0.0242 0.0021 0.0221
167 0.0248 0.0022 0.0227
168 0.0252 0.0022 0.0230
169 0.0252 0.0022 0.0230
170 0.0256 0.0022 0.0233
171 0.0263 0.0023 0.0240
172 0.0267 0.0023 0.0244
173 0.0276 0.0024 0.0252
174 0.0281 0.0024 0.0257
175 0.0291 0.0025 0.0266
176 0.0297 0.0026 0.0271
177 0.0309 0.0027 0.0282
178 0.0316 0.0027 0.0289
179 0.0331 0.0029 0.0302
180 0.0339 0.0029 0.0310
181 0.0358 0.0031 0.0327
182 0.0369 0.0032 0.0337
183 0.0393 0.0034 0.0359
184 0.0407 0.0035 0.0372
185 0.0436 0.0038 0.0398
186 0.0456 0.0039 0.0417
187 0.0507 0.0044 0.0463
188 0.0540 0.0047 0.0494
189 0.0616 0.0053 0.0563
190 0.0683 0.0059 0.0624
191 0.0929 0.0080 0.0849
192 0.1222 0.0106 0.1116
193 0.3070 0.0208 0.2861
194 0.0779 0.0067 0.0712
195 0.0581 0.0050 0.0531
196 0.0480 0.0042 0.0438
197 0.0423 0.0037 0.0387
198 0.0380 0.0033 0.0347
199 0.0348 0.0030 0.0318
200 0.0323 0.0028 0.0295
201 0.0303 0.0026 0.0277
202 0.0286 0.0025 0.0261
203 0.0272 0.0024 0.0248
204 0.0259 0.0022 0.0237
205 0.0255 0.0022 0.0233
206 0.0245 0.0021 0.0224
207 0.0237 0.0021 0.0216
208 0.0229 0.0020 0.0209
209 0.0222 0.0019 0.0203

210 0.0216 0.0019 0.0197
211 0.0210 0.0018 0.0192
212 0.0205 0.0018 0.0187
213 0.0200 0.0017 0.0182
214 0.0195 0.0017 0.0178
215 0.0191 0.0017 0.0174
216 0.0187 0.0016 0.0171
217 0.0170 0.0015 0.0155
218 0.0167 0.0014 0.0152
219 0.0163 0.0014 0.0149
220 0.0160 0.0014 0.0146
221 0.0157 0.0014 0.0143
222 0.0154 0.0013 0.0141
223 0.0152 0.0013 0.0138
224 0.0149 0.0013 0.0136
225 0.0147 0.0013 0.0134
226 0.0144 0.0012 0.0132
227 0.0142 0.0012 0.0130
228 0.0140 0.0012 0.0128
229 0.0138 0.0012 0.0126
230 0.0136 0.0012 0.0124
231 0.0134 0.0012 0.0122
232 0.0132 0.0011 0.0121
233 0.0131 0.0011 0.0119
234 0.0129 0.0011 0.0118
235 0.0127 0.0011 0.0116
236 0.0126 0.0011 0.0115
237 0.0124 0.0011 0.0114
238 0.0123 0.0011 0.0112
239 0.0121 0.0011 0.0111
240 0.0120 0.0010 0.0110
241 0.0119 0.0010 0.0109
242 0.0118 0.0010 0.0107
243 0.0116 0.0010 0.0106
244 0.0115 0.0010 0.0105
245 0.0114 0.0010 0.0104
246 0.0113 0.0010 0.0103
247 0.0112 0.0010 0.0102
248 0.0111 0.0010 0.0101
249 0.0110 0.0009 0.0100
250 0.0109 0.0009 0.0099
251 0.0108 0.0009 0.0098
252 0.0107 0.0009 0.0098
253 0.0106 0.0009 0.0097
254 0.0105 0.0009 0.0096
255 0.0104 0.0009 0.0095
256 0.0103 0.0009 0.0094
257 0.0102 0.0009 0.0093
258 0.0102 0.0009 0.0093
259 0.0101 0.0009 0.0092

260 0.0100 0.0009 0.0091
261 0.0099 0.0009 0.0091
262 0.0098 0.0009 0.0090
263 0.0098 0.0008 0.0089
264 0.0097 0.0008 0.0089
265 0.0096 0.0008 0.0088
266 0.0096 0.0008 0.0087
267 0.0095 0.0008 0.0087
268 0.0094 0.0008 0.0086
269 0.0094 0.0008 0.0086
270 0.0093 0.0008 0.0085
271 0.0092 0.0008 0.0084
272 0.0092 0.0008 0.0084
273 0.0091 0.0008 0.0083
274 0.0091 0.0008 0.0083
275 0.0090 0.0008 0.0082
276 0.0089 0.0008 0.0082
277 0.0089 0.0008 0.0081
278 0.0088 0.0008 0.0081
279 0.0088 0.0008 0.0080
280 0.0087 0.0008 0.0080
281 0.0087 0.0008 0.0079
282 0.0086 0.0007 0.0079
283 0.0086 0.0007 0.0078
284 0.0085 0.0007 0.0078
285 0.0085 0.0007 0.0077
286 0.0084 0.0007 0.0077
287 0.0084 0.0007 0.0077
288 0.0083 0.0007 0.0076
-------------------------------------------------------------------- -------------------------------------------------------------------- Total soil rain loss = 0.43(In)
Total effective rainfall = 4.55(In)
Peak flow rate in flood hydrograph = 5.20(CFS)
--------------------------------------------------------------------- ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 24 - H O U R S T O R M
R u n o f f H y d r o g r a p h
-------------------------------------------------------------------- Hydrograph in 5 Minute intervals ((CFS))
-------------------------------------------------------------------- Time(h+m) Volume Ac.Ft Q(CFS) 0 2.5 5.0 7.5 10.0
----------------------------------------------------------------------- 0+ 5 0.0001 0.01 Q | | | |
0+10 0.0006 0.07 Q | | | |
0+15 0.0017 0.16 Q | | | |
0+20 0.0032 0.22 Q | | | |
0+25 0.0048 0.24 Q | | | |
0+30 0.0065 0.24 Q | | | |

0+35 0.0081 0.24 Q | | | |
0+40 0.0098 0.25 Q | | | |
0+45 0.0115 0.25 Q | | | |
0+50 0.0132 0.25 Q | | | |
0+55 0.0149 0.25 Q | | | |
1+ 0 0.0166 0.25 Q | | | |
1+ 5 0.0184 0.25 Q | | | |
1+10 0.0201 0.25 Q | | | |
1+15 0.0218 0.25 VQ | | | |
1+20 0.0235 0.25 VQ | | | |
1+25 0.0253 0.25 |Q | | | |
1+30 0.0270 0.25 |Q | | | |
1+35 0.0287 0.25 |Q | | | |
1+40 0.0305 0.25 |Q | | | |
1+45 0.0322 0.25 |Q | | | |
1+50 0.0340 0.26 |Q | | | |
1+55 0.0358 0.26 |Q | | | |
2+ 0 0.0375 0.26 |Q | | | |
2+ 5 0.0393 0.26 |Q | | | |
2+10 0.0411 0.26 |Q | | | |
2+15 0.0429 0.26 |Q | | | |
2+20 0.0447 0.26 |Q | | | |
2+25 0.0465 0.26 |Q | | | |
2+30 0.0483 0.26 |Q | | | |
2+35 0.0501 0.26 |QV | | | |
2+40 0.0519 0.26 |QV | | | |
2+45 0.0537 0.26 |QV | | | |
2+50 0.0556 0.27 |QV | | | |
2+55 0.0574 0.27 |QV | | | |
3+ 0 0.0592 0.27 |QV | | | |
3+ 5 0.0611 0.27 |QV | | | |
3+10 0.0629 0.27 |QV | | | |
3+15 0.0648 0.27 |QV | | | |
3+20 0.0666 0.27 |QV | | | |
3+25 0.0685 0.27 |QV | | | |
3+30 0.0704 0.27 |QV | | | |
3+35 0.0723 0.27 |QV | | | |
3+40 0.0742 0.27 |QV | | | |
3+45 0.0761 0.28 |Q V | | | |
3+50 0.0780 0.28 |Q V | | | |
3+55 0.0799 0.28 |Q V | | | |
4+ 0 0.0818 0.28 |Q V | | | |
4+ 5 0.0837 0.28 |Q V | | | |
4+10 0.0856 0.28 |Q V | | | |
4+15 0.0876 0.28 |Q V | | | |
4+20 0.0895 0.28 |Q V | | | |
4+25 0.0915 0.28 |Q V | | | |
4+30 0.0934 0.28 |Q V | | | |
4+35 0.0954 0.29 |Q V | | | |
4+40 0.0974 0.29 |Q V | | | |

4+45 0.0993 0.29 |Q V | | | |
4+50 0.1013 0.29 |Q V | | | |
4+55 0.1033 0.29 |Q V | | | |
5+ 0 0.1053 0.29 |Q V | | | |
5+ 5 0.1073 0.29 |Q V | | | |
5+10 0.1094 0.29 |Q V | | | |
5+15 0.1114 0.29 |Q V | | | |
5+20 0.1134 0.30 |Q V | | | |
5+25 0.1155 0.30 |Q V | | | |
5+30 0.1175 0.30 |Q V | | | |
5+35 0.1196 0.30 |Q V | | | |
5+40 0.1216 0.30 |Q V | | | |
5+45 0.1237 0.30 |Q V | | | |
5+50 0.1258 0.30 |Q V | | | |
5+55 0.1279 0.30 |Q V | | | |
6+ 0 0.1300 0.31 |Q V | | | |
6+ 5 0.1321 0.31 |Q V | | | |
6+10 0.1342 0.31 |Q V | | | |
6+15 0.1363 0.31 |Q V | | | |
6+20 0.1385 0.31 |Q V | | | |
6+25 0.1406 0.31 |Q V | | | |
6+30 0.1428 0.31 |Q V | | | |
6+35 0.1450 0.31 |Q V | | | |
6+40 0.1471 0.32 |Q V | | | |
6+45 0.1493 0.32 |Q V | | | |
6+50 0.1515 0.32 |Q V | | | |
6+55 0.1537 0.32 |Q V | | | |
7+ 0 0.1559 0.32 |Q V | | | |
7+ 5 0.1582 0.32 |Q V | | | |
7+10 0.1604 0.32 |Q V | | | |
7+15 0.1627 0.33 |Q V | | | |
7+20 0.1649 0.33 |Q V | | | |
7+25 0.1672 0.33 |Q V | | | |
7+30 0.1695 0.33 |Q V | | | |
7+35 0.1718 0.33 |Q V | | | |
7+40 0.1741 0.33 |Q V | | | |
7+45 0.1764 0.34 |Q V | | | |
7+50 0.1787 0.34 |Q V | | | |
7+55 0.1811 0.34 |Q V | | | |
8+ 0 0.1834 0.34 |Q V | | | |
8+ 5 0.1858 0.34 |Q V | | | |
8+10 0.1881 0.35 |Q V | | | |
8+15 0.1905 0.35 |Q V | | | |
8+20 0.1929 0.35 |Q V | | | |
8+25 0.1954 0.35 |Q V | | | |
8+30 0.1978 0.35 |Q V | | | |
8+35 0.2002 0.35 |Q V | | | |
8+40 0.2027 0.36 |Q V | | | |
8+45 0.2052 0.36 |Q V | | | |
8+50 0.2077 0.36 |Q V | | | |

8+55 0.2102 0.36 |Q V | | | |
9+ 0 0.2127 0.37 |Q V | | | |
9+ 5 0.2152 0.37 |Q V | | | |
9+10 0.2178 0.37 |Q V | | | |
9+15 0.2203 0.37 |Q V | | | |
9+20 0.2229 0.37 |Q V | | | |
9+25 0.2255 0.38 |Q V| | | |
9+30 0.2281 0.38 |Q V| | | |
9+35 0.2307 0.38 |Q V| | | |
9+40 0.2334 0.38 |Q V| | | |
9+45 0.2360 0.39 |Q V| | | |
9+50 0.2387 0.39 |Q V| | | |
9+55 0.2414 0.39 |Q V| | | |
10+ 0 0.2441 0.39 |Q V| | | |
10+ 5 0.2469 0.40 |Q V| | | |
10+10 0.2496 0.40 |Q V| | | |
10+15 0.2524 0.40 |Q V | | |
10+20 0.2552 0.41 |Q V | | |
10+25 0.2580 0.41 |Q V | | |
10+30 0.2609 0.41 |Q V | | |
10+35 0.2637 0.42 |Q V | | |
10+40 0.2666 0.42 |Q V | | |
10+45 0.2695 0.42 |Q V | | |
10+50 0.2724 0.43 |Q V | | |
10+55 0.2754 0.43 |Q V | | |
11+ 0 0.2784 0.43 |Q |V | | |
11+ 5 0.2814 0.44 |Q |V | | |
11+10 0.2844 0.44 |Q |V | | |
11+15 0.2875 0.44 |Q |V | | |
11+20 0.2905 0.45 |Q |V | | |
11+25 0.2936 0.45 |Q |V | | |
11+30 0.2968 0.46 |Q |V | | |
11+35 0.2999 0.46 |Q |V | | |
11+40 0.3031 0.46 |Q | V | | |
11+45 0.3064 0.47 |Q | V | | |
11+50 0.3096 0.47 |Q | V | | |
11+55 0.3129 0.48 |Q | V | | |
12+ 0 0.3162 0.48 |Q | V | | |
12+ 5 0.3196 0.49 |Q | V | | |
12+10 0.3231 0.50 | Q | V | | |
12+15 0.3267 0.52 | Q | V | | |
12+20 0.3304 0.54 | Q | V | | |
12+25 0.3341 0.55 | Q | V | | |
12+30 0.3379 0.55 | Q | V | | |
12+35 0.3418 0.56 | Q | V | | |
12+40 0.3457 0.56 | Q | V | | |
12+45 0.3496 0.57 | Q | V | | |
12+50 0.3536 0.58 | Q | V | | |
12+55 0.3576 0.58 | Q | V | | |
13+ 0 0.3617 0.59 | Q | V | | |

13+ 5 0.3658 0.60 | Q | V | | |
13+10 0.3700 0.61 | Q | V | | |
13+15 0.3742 0.62 | Q | V | | |
13+20 0.3785 0.62 | Q | V | | |
13+25 0.3829 0.63 | Q | V | | |
13+30 0.3873 0.64 | Q | V | | |
13+35 0.3918 0.65 | Q | V | | |
13+40 0.3964 0.66 | Q | V | | |
13+45 0.4010 0.67 | Q | V | | |
13+50 0.4057 0.68 | Q | V | | |
13+55 0.4105 0.70 | Q | V | | |
14+ 0 0.4154 0.71 | Q | V | | |
14+ 5 0.4203 0.72 | Q | V | | |
14+10 0.4254 0.73 | Q | V | | |
14+15 0.4304 0.74 | Q | V | | |
14+20 0.4356 0.75 | Q | V | | |
14+25 0.4408 0.76 | Q | V | | |
14+30 0.4462 0.78 | Q | V | | |
14+35 0.4517 0.80 | Q | V | | |
14+40 0.4574 0.82 | Q | V | | |
14+45 0.4632 0.84 | Q | V | | |
14+50 0.4692 0.87 | Q | V | | |
14+55 0.4753 0.89 | Q | V | | |
15+ 0 0.4817 0.92 | Q | V| | |
15+ 5 0.4883 0.96 | Q | V| | |
15+10 0.4951 0.99 | Q | V| | |
15+15 0.5022 1.03 | Q | V | |
15+20 0.5097 1.08 | Q | V | |
15+25 0.5175 1.13 | Q | V | |
15+30 0.5257 1.19 | Q | V | |
15+35 0.5344 1.26 | Q | |V | |
15+40 0.5437 1.35 | Q | |V | |
15+45 0.5537 1.46 | Q | | V | |
15+50 0.5647 1.60 | Q | | V | |
15+55 0.5771 1.80 | Q | | V | |
16+ 0 0.5919 2.15 | Q | | V | |
16+ 5 0.6121 2.94 | |Q | V | |
16+10 0.6432 4.51 | | Q | V | |
16+15 0.6790 5.20 | | Q V | |
16+20 0.7043 3.68 | | Q | V | |
16+25 0.7204 2.33 | Q| | V | |
16+30 0.7317 1.65 | Q | | V| |
16+35 0.7411 1.36 | Q | | V| |
16+40 0.7493 1.18 | Q | | V| |
16+45 0.7565 1.05 | Q | | V |
16+50 0.7631 0.96 | Q | | V |
16+55 0.7693 0.90 | Q | | V |
17+ 0 0.7752 0.85 | Q | | V |
17+ 5 0.7807 0.80 | Q | | |V |
17+10 0.7860 0.77 | Q | | |V |

17+15 0.7911 0.74 | Q | | |V |
17+20 0.7961 0.72 | Q | | |V |
17+25 0.8009 0.70 | Q | | |V |
17+30 0.8055 0.67 | Q | | | V |
17+35 0.8100 0.65 | Q | | | V |
17+40 0.8144 0.63 | Q | | | V |
17+45 0.8186 0.62 | Q | | | V |
17+50 0.8227 0.60 | Q | | | V |
17+55 0.8268 0.59 | Q | | | V |
18+ 0 0.8307 0.57 | Q | | | V |
18+ 5 0.8345 0.56 | Q | | | V |
18+10 0.8382 0.54 | Q | | | V |
18+15 0.8417 0.51 | Q | | | V |
18+20 0.8451 0.49 |Q | | | V |
18+25 0.8484 0.48 |Q | | | V |
18+30 0.8516 0.47 |Q | | | V |
18+35 0.8548 0.46 |Q | | | V |
18+40 0.8579 0.45 |Q | | | V |
18+45 0.8610 0.44 |Q | | | V |
18+50 0.8640 0.44 |Q | | | V |
18+55 0.8669 0.43 |Q | | | V |
19+ 0 0.8698 0.42 |Q | | | V |
19+ 5 0.8727 0.42 |Q | | | V |
19+10 0.8755 0.41 |Q | | | V |
19+15 0.8783 0.40 |Q | | | V |
19+20 0.8810 0.40 |Q | | | V |
19+25 0.8837 0.39 |Q | | | V |
19+30 0.8864 0.39 |Q | | | V |
19+35 0.8890 0.38 |Q | | | V |
19+40 0.8916 0.38 |Q | | | V |
19+45 0.8942 0.37 |Q | | | V |
19+50 0.8967 0.37 |Q | | | V |
19+55 0.8992 0.36 |Q | | | V |
20+ 0 0.9017 0.36 |Q | | | V |
20+ 5 0.9041 0.35 |Q | | | V |
20+10 0.9065 0.35 |Q | | | V |
20+15 0.9089 0.35 |Q | | | V |
20+20 0.9113 0.34 |Q | | | V |
20+25 0.9136 0.34 |Q | | | V |
20+30 0.9159 0.34 |Q | | | V |
20+35 0.9182 0.33 |Q | | | V |
20+40 0.9205 0.33 |Q | | | V |
20+45 0.9228 0.33 |Q | | | V |
20+50 0.9250 0.32 |Q | | | V |
20+55 0.9272 0.32 |Q | | | V |
21+ 0 0.9294 0.32 |Q | | | V |
21+ 5 0.9315 0.31 |Q | | | V |
21+10 0.9337 0.31 |Q | | | V |
21+15 0.9358 0.31 |Q | | | V |
21+20 0.9379 0.31 |Q | | | V |

21+25 0.9400 0.30 |Q | | | V |
21+30 0.9421 0.30 |Q | | | V |
21+35 0.9442 0.30 |Q | | | V |
21+40 0.9462 0.30 |Q | | | V |
21+45 0.9482 0.29 |Q | | | V |
21+50 0.9502 0.29 |Q | | | V |
21+55 0.9522 0.29 |Q | | | V |
22+ 0 0.9542 0.29 |Q | | | V |
22+ 5 0.9562 0.29 |Q | | | V |
22+10 0.9581 0.28 |Q | | | V |
22+15 0.9601 0.28 |Q | | | V |
22+20 0.9620 0.28 |Q | | | V |
22+25 0.9639 0.28 |Q | | | V |
22+30 0.9658 0.28 |Q | | | V |
22+35 0.9677 0.27 |Q | | | V |
22+40 0.9695 0.27 |Q | | | V |
22+45 0.9714 0.27 |Q | | | V |
22+50 0.9732 0.27 |Q | | | V |
22+55 0.9751 0.27 |Q | | | V |
23+ 0 0.9769 0.26 |Q | | | V|
23+ 5 0.9787 0.26 |Q | | | V|
23+10 0.9805 0.26 |Q | | | V|
23+15 0.9823 0.26 |Q | | | V|
23+20 0.9841 0.26 |Q | | | V|
23+25 0.9858 0.26 |Q | | | V|
23+30 0.9876 0.25 |Q | | | V|
23+35 0.9893 0.25 |Q | | | V|
23+40 0.9911 0.25 |Q | | | V|
23+45 0.9928 0.25 |Q | | | V|
23+50 0.9945 0.25 Q | | | V|
23+55 0.9962 0.25 Q | | | V|
24+ 0 0.9979 0.25 Q | | | V|
-----------------------------------------------------------------------

U n i t H y d r o g r a p h A n a l y s i s
Copyright (c) CIVILCADD/CIVILDESIGN, 1989-2018, Version 9.0 Study date 03/11/25 File Name CV164X100.out
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ ------------------------------------------------------------------------ Orange County Unit Hydrograph Hydrology Method
Manual Date(s) - October 1986, November 1996
Program License Serial Number 6677
--------------------------------------------------------------------- TTM 19389

YORBA LINDA
EXISTING Q100

PRELIMINARY
-------------------------------------------------------------------- Storm Event Year = 100
Antecedent Moisture Condition = 3
English (in-lb) Input Units Used
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ ******** Area-averaged max loss rate, Fm ********
SCS curve Area Area Soil Fp Ap Fm
No.(AMCII) (Ac.) Fraction Group (In/Hr) (dec.) (In/Hr)

86.0 2.6 1.00 C 0.250 0.150 0.037
Area-averaged adjusted loss rate Fm (In/Hr) = 0.037
********* Area-Averaged low loss rate fraction, Yb ********** Area Area SCS CN SCS CN S Pervious
(Ac.) Fract (AMC2) (AMC3) Yield Fr

0.40 0.150 86.0 97.2 0.29 0.948

2.24 0.850 98.0 98.0 0.20 0.963
Area-averaged catchment yield fraction, Y = 0.960
Area-averaged low loss fraction, Yb = 0.040
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

User entry of time of concentration = 0.207 (hours)
Watershed area = 2.64(Ac.)
Catchment Lag time = 0.166 hours
Unit interval = 5.000 minutes
Unit interval percentage of lag time = 50.2008
Hydrograph baseflow = 0.00(CFS)
Average maximum watershed loss rate(Fm) = 0.250(In/Hr)
Average low loss rate fraction (Yb) = 0.040 (decimal)
Note: user entry of the Fm value
VALLEY DEVELOPED S-Graph Selected
Computed peak 5-minute rainfall = 0.393(In)
Computed peak 30-minute rainfall = 0.934(In)
Specified peak 1-hour rainfall = 1.320(In)
Computed peak 3-hour rainfall = 2.220(In)
Specified peak 6-hour rainfall = 3.150(In)
Specified peak 24-hour rainfall = 6.370(In)
Note: user specified rainfall values used.

Rainfall depth area reduction factors:

Using a total area of 2.64(Ac.) (Ref: fig. E-4)
5-minute factor = 1.000 Adjusted rainfall = 0.393(In)
30-minute factor = 1.000 Adjusted rainfall = 0.934(In)
1-hour factor = 1.000 Adjusted rainfall = 1.320(In)
3-hour factor = 1.000 Adjusted rainfall = 2.220(In)
6-hour factor = 1.000 Adjusted rainfall = 3.150(In)
24-hour factor = 1.000 Adjusted rainfall = 6.370(In)
--------------------------------------------------------------------- U n i t H y d r o g r a p h
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Interval 'S' Graph Unit Hydrograph
Number Mean values ((CFS))
--------------------------------------------------------------------- (K = 31.93 (CFS))
1 4.612 1.473
2 30.030 8.115
3 69.112 12.478
4 90.098 6.700
5 97.075 2.228
6 98.770 0.541
7 100.000 0.393
--------------------------------------------------------------------- Peak Unit Adjusted mass rainfall Unit rainfall
Number (In) (In)
1 0.3930 0.3930
2 0.5493 0.1563
3 0.6681 0.1189

4 0.7677 0.0996
5 0.8551 0.0874
6 0.9339 0.0787
7 1.0086 0.0747
8 1.0781 0.0695
9 1.1433 0.0653
10 1.2051 0.0617
11 1.2638 0.0587
12 1.3198 0.0561
13 1.3708 0.0510
14 1.4197 0.0489
15 1.4669 0.0471
16 1.5124 0.0455
17 1.5564 0.0440
18 1.5991 0.0427
19 1.6405 0.0414
20 1.6808 0.0403
21 1.7201 0.0393
22 1.7584 0.0383
23 1.7958 0.0374
24 1.8323 0.0365
25 1.8681 0.0357
26 1.9031 0.0350
27 1.9374 0.0343
28 1.9710 0.0336
29 2.0040 0.0330
30 2.0364 0.0324
31 2.0683 0.0319
32 2.0996 0.0313
33 2.1304 0.0308
34 2.1607 0.0303
35 2.1906 0.0298
36 2.2200 0.0294
37 2.2509 0.0309
38 2.2814 0.0305
39 2.3115 0.0301
40 2.3412 0.0297
41 2.3706 0.0294
42 2.3996 0.0290
43 2.4283 0.0287
44 2.4566 0.0283
45 2.4847 0.0280
46 2.5124 0.0277
47 2.5398 0.0274
48 2.5669 0.0271
49 2.5938 0.0269
50 2.6204 0.0266
51 2.6467 0.0263
52 2.6728 0.0261
53 2.6986 0.0258

54 2.7242 0.0256
55 2.7495 0.0254
56 2.7747 0.0251
57 2.7996 0.0249
58 2.8243 0.0247
59 2.8487 0.0245
60 2.8730 0.0243
61 2.8971 0.0241
62 2.9210 0.0239
63 2.9446 0.0237
64 2.9681 0.0235
65 2.9915 0.0233
66 3.0146 0.0231
67 3.0376 0.0230
68 3.0604 0.0228
69 3.0830 0.0226
70 3.1055 0.0225
71 3.1278 0.0223
72 3.1500 0.0222
73 3.1721 0.0221
74 3.1941 0.0220
75 3.2160 0.0219
76 3.2377 0.0217
77 3.2593 0.0216
78 3.2807 0.0214
79 3.3020 0.0213
80 3.3232 0.0212
81 3.3442 0.0210
82 3.3651 0.0209
83 3.3859 0.0208
84 3.4065 0.0207
85 3.4271 0.0205
86 3.4475 0.0204
87 3.4678 0.0203
88 3.4880 0.0202
89 3.5081 0.0201
90 3.5281 0.0200
91 3.5479 0.0199
92 3.5677 0.0198
93 3.5873 0.0196
94 3.6068 0.0195
95 3.6263 0.0194
96 3.6456 0.0193
97 3.6649 0.0192
98 3.6840 0.0191
99 3.7031 0.0190
100 3.7220 0.0190
101 3.7409 0.0189
102 3.7596 0.0188
103 3.7783 0.0187

104 3.7969 0.0186
105 3.8154 0.0185
106 3.8338 0.0184
107 3.8522 0.0183
108 3.8704 0.0182
109 3.8886 0.0182
110 3.9067 0.0181
111 3.9247 0.0180
112 3.9426 0.0179
113 3.9604 0.0178
114 3.9782 0.0178
115 3.9959 0.0177
116 4.0135 0.0176
117 4.0310 0.0175
118 4.0485 0.0175
119 4.0659 0.0174
120 4.0832 0.0173
121 4.1004 0.0172
122 4.1176 0.0172
123 4.1347 0.0171
124 4.1518 0.0170
125 4.1688 0.0170
126 4.1857 0.0169
127 4.2025 0.0168
128 4.2193 0.0168
129 4.2360 0.0167
130 4.2526 0.0166
131 4.2692 0.0166
132 4.2858 0.0165
133 4.3022 0.0165
134 4.3186 0.0164
135 4.3350 0.0163
136 4.3512 0.0163
137 4.3675 0.0162
138 4.3836 0.0162
139 4.3997 0.0161
140 4.4158 0.0161
141 4.4318 0.0160
142 4.4477 0.0159
143 4.4636 0.0159
144 4.4794 0.0158
145 4.4952 0.0158
146 4.5109 0.0157
147 4.5266 0.0157
148 4.5422 0.0156
149 4.5578 0.0156
150 4.5733 0.0155
151 4.5887 0.0155
152 4.6042 0.0154
153 4.6195 0.0154

154 4.6348 0.0153
155 4.6501 0.0153
156 4.6653 0.0152
157 4.6805 0.0152
158 4.6956 0.0151
159 4.7107 0.0151
160 4.7257 0.0150
161 4.7407 0.0150
162 4.7556 0.0149
163 4.7705 0.0149
164 4.7853 0.0148
165 4.8001 0.0148
166 4.8149 0.0148
167 4.8296 0.0147
168 4.8443 0.0147
169 4.8589 0.0146
170 4.8735 0.0146
171 4.8880 0.0145
172 4.9025 0.0145
173 4.9170 0.0145
174 4.9314 0.0144
175 4.9458 0.0144
176 4.9601 0.0143
177 4.9744 0.0143
178 4.9887 0.0143
179 5.0029 0.0142
180 5.0171 0.0142
181 5.0312 0.0141
182 5.0453 0.0141
183 5.0594 0.0141
184 5.0734 0.0140
185 5.0874 0.0140
186 5.1013 0.0140
187 5.1153 0.0139
188 5.1291 0.0139
189 5.1430 0.0138
190 5.1568 0.0138
191 5.1705 0.0138
192 5.1843 0.0137
193 5.1980 0.0137
194 5.2116 0.0137
195 5.2253 0.0136
196 5.2389 0.0136
197 5.2524 0.0136
198 5.2659 0.0135
199 5.2794 0.0135
200 5.2929 0.0135
201 5.3063 0.0134
202 5.3197 0.0134
203 5.3331 0.0134

204 5.3464 0.0133
205 5.3597 0.0133
206 5.3730 0.0133
207 5.3862 0.0132
208 5.3994 0.0132
209 5.4126 0.0132
210 5.4257 0.0131
211 5.4388 0.0131
212 5.4519 0.0131
213 5.4650 0.0130
214 5.4780 0.0130
215 5.4910 0.0130
216 5.5039 0.0130
217 5.5169 0.0129
218 5.5298 0.0129
219 5.5426 0.0129
220 5.5555 0.0128
221 5.5683 0.0128
222 5.5811 0.0128
223 5.5938 0.0128
224 5.6065 0.0127
225 5.6192 0.0127
226 5.6319 0.0127
227 5.6446 0.0126
228 5.6572 0.0126
229 5.6698 0.0126
230 5.6823 0.0126
231 5.6949 0.0125
232 5.7074 0.0125
233 5.7199 0.0125
234 5.7323 0.0125
235 5.7448 0.0124
236 5.7572 0.0124
237 5.7695 0.0124
238 5.7819 0.0124
239 5.7942 0.0123
240 5.8065 0.0123
241 5.8188 0.0123
242 5.8310 0.0123
243 5.8433 0.0122
244 5.8555 0.0122
245 5.8677 0.0122
246 5.8798 0.0122
247 5.8919 0.0121
248 5.9040 0.0121
249 5.9161 0.0121
250 5.9282 0.0121
251 5.9402 0.0120
252 5.9522 0.0120
253 5.9642 0.0120

254 5.9762 0.0120
255 5.9881 0.0119
256 6.0000 0.0119
257 6.0119 0.0119
258 6.0238 0.0119
259 6.0357 0.0118
260 6.0475 0.0118
261 6.0593 0.0118
262 6.0711 0.0118
263 6.0828 0.0118
264 6.0946 0.0117
265 6.1063 0.0117
266 6.1180 0.0117
267 6.1296 0.0117
268 6.1413 0.0117
269 6.1529 0.0116
270 6.1645 0.0116
271 6.1761 0.0116
272 6.1877 0.0116
273 6.1992 0.0115
274 6.2108 0.0115
275 6.2223 0.0115
276 6.2337 0.0115
277 6.2452 0.0115
278 6.2566 0.0114
279 6.2681 0.0114
280 6.2795 0.0114
281 6.2909 0.0114
282 6.3022 0.0114
283 6.3136 0.0113
284 6.3249 0.0113
285 6.3362 0.0113
286 6.3475 0.0113
287 6.3587 0.0113
288 6.3700 0.0112
--------------------------------------------------------------------- Unit Unit Unit Effective
Period Rainfall Soil-Loss Rainfall
(number) (In) (In) (In)
--------------------------------------------------------------------- 1 0.0112 0.0004 0.0108
2 0.0113 0.0004 0.0108
3 0.0113 0.0004 0.0109
4 0.0113 0.0004 0.0109
5 0.0114 0.0005 0.0109
6 0.0114 0.0005 0.0109
7 0.0114 0.0005 0.0110
8 0.0114 0.0005 0.0110
9 0.0115 0.0005 0.0110
10 0.0115 0.0005 0.0110

11 0.0115 0.0005 0.0111
12 0.0116 0.0005 0.0111
13 0.0116 0.0005 0.0111
14 0.0116 0.0005 0.0112
15 0.0117 0.0005 0.0112
16 0.0117 0.0005 0.0112
17 0.0117 0.0005 0.0113
18 0.0118 0.0005 0.0113
19 0.0118 0.0005 0.0113
20 0.0118 0.0005 0.0114
21 0.0119 0.0005 0.0114
22 0.0119 0.0005 0.0114
23 0.0119 0.0005 0.0115
24 0.0120 0.0005 0.0115
25 0.0120 0.0005 0.0115
26 0.0120 0.0005 0.0116
27 0.0121 0.0005 0.0116
28 0.0121 0.0005 0.0116
29 0.0122 0.0005 0.0117
30 0.0122 0.0005 0.0117
31 0.0122 0.0005 0.0117
32 0.0123 0.0005 0.0118
33 0.0123 0.0005 0.0118
34 0.0123 0.0005 0.0118
35 0.0124 0.0005 0.0119
36 0.0124 0.0005 0.0119
37 0.0125 0.0005 0.0120
38 0.0125 0.0005 0.0120
39 0.0125 0.0005 0.0120
40 0.0126 0.0005 0.0121
41 0.0126 0.0005 0.0121
42 0.0126 0.0005 0.0121
43 0.0127 0.0005 0.0122
44 0.0127 0.0005 0.0122
45 0.0128 0.0005 0.0123
46 0.0128 0.0005 0.0123
47 0.0129 0.0005 0.0124
48 0.0129 0.0005 0.0124
49 0.0130 0.0005 0.0124
50 0.0130 0.0005 0.0125
51 0.0130 0.0005 0.0125
52 0.0131 0.0005 0.0126
53 0.0131 0.0005 0.0126
54 0.0132 0.0005 0.0126
55 0.0132 0.0005 0.0127
56 0.0133 0.0005 0.0127
57 0.0133 0.0005 0.0128
58 0.0134 0.0005 0.0128
59 0.0134 0.0005 0.0129
60 0.0135 0.0005 0.0129

61 0.0135 0.0005 0.0130
62 0.0136 0.0005 0.0130
63 0.0136 0.0005 0.0131
64 0.0137 0.0005 0.0131
65 0.0137 0.0005 0.0132
66 0.0138 0.0005 0.0132
67 0.0138 0.0005 0.0133
68 0.0139 0.0006 0.0133
69 0.0140 0.0006 0.0134
70 0.0140 0.0006 0.0134
71 0.0141 0.0006 0.0135
72 0.0141 0.0006 0.0135
73 0.0142 0.0006 0.0136
74 0.0142 0.0006 0.0137
75 0.0143 0.0006 0.0137
76 0.0143 0.0006 0.0138
77 0.0144 0.0006 0.0138
78 0.0145 0.0006 0.0139
79 0.0145 0.0006 0.0140
80 0.0146 0.0006 0.0140
81 0.0147 0.0006 0.0141
82 0.0147 0.0006 0.0141
83 0.0148 0.0006 0.0142
84 0.0148 0.0006 0.0143
85 0.0149 0.0006 0.0143
86 0.0150 0.0006 0.0144
87 0.0151 0.0006 0.0145
88 0.0151 0.0006 0.0145
89 0.0152 0.0006 0.0146
90 0.0153 0.0006 0.0147
91 0.0154 0.0006 0.0148
92 0.0154 0.0006 0.0148
93 0.0155 0.0006 0.0149
94 0.0156 0.0006 0.0149
95 0.0157 0.0006 0.0150
96 0.0157 0.0006 0.0151
97 0.0158 0.0006 0.0152
98 0.0159 0.0006 0.0153
99 0.0160 0.0006 0.0154
100 0.0161 0.0006 0.0154
101 0.0162 0.0006 0.0155
102 0.0162 0.0006 0.0156
103 0.0163 0.0006 0.0157
104 0.0164 0.0007 0.0158
105 0.0165 0.0007 0.0159
106 0.0166 0.0007 0.0159
107 0.0167 0.0007 0.0160
108 0.0168 0.0007 0.0161
109 0.0169 0.0007 0.0162
110 0.0170 0.0007 0.0163

111 0.0171 0.0007 0.0164
112 0.0172 0.0007 0.0165
113 0.0173 0.0007 0.0166
114 0.0174 0.0007 0.0167
115 0.0175 0.0007 0.0168
116 0.0176 0.0007 0.0169
117 0.0178 0.0007 0.0171
118 0.0178 0.0007 0.0171
119 0.0180 0.0007 0.0173
120 0.0181 0.0007 0.0174
121 0.0182 0.0007 0.0175
122 0.0183 0.0007 0.0176
123 0.0185 0.0007 0.0178
124 0.0186 0.0007 0.0179
125 0.0188 0.0007 0.0180
126 0.0189 0.0007 0.0181
127 0.0190 0.0008 0.0183
128 0.0191 0.0008 0.0184
129 0.0193 0.0008 0.0186
130 0.0194 0.0008 0.0187
131 0.0196 0.0008 0.0189
132 0.0198 0.0008 0.0190
133 0.0200 0.0008 0.0192
134 0.0201 0.0008 0.0193
135 0.0203 0.0008 0.0195
136 0.0204 0.0008 0.0196
137 0.0207 0.0008 0.0198
138 0.0208 0.0008 0.0200
139 0.0210 0.0008 0.0202
140 0.0212 0.0008 0.0203
141 0.0214 0.0009 0.0206
142 0.0216 0.0009 0.0207
143 0.0219 0.0009 0.0210
144 0.0220 0.0009 0.0211
145 0.0222 0.0009 0.0213
146 0.0223 0.0009 0.0214
147 0.0226 0.0009 0.0217
148 0.0228 0.0009 0.0219
149 0.0231 0.0009 0.0222
150 0.0233 0.0009 0.0224
151 0.0237 0.0009 0.0227
152 0.0239 0.0009 0.0229
153 0.0243 0.0010 0.0233
154 0.0245 0.0010 0.0235
155 0.0249 0.0010 0.0239
156 0.0251 0.0010 0.0241
157 0.0256 0.0010 0.0246
158 0.0258 0.0010 0.0248
159 0.0263 0.0010 0.0253
160 0.0266 0.0011 0.0255

161 0.0271 0.0011 0.0261
162 0.0274 0.0011 0.0263
163 0.0280 0.0011 0.0269
164 0.0283 0.0011 0.0272
165 0.0290 0.0012 0.0279
166 0.0294 0.0012 0.0282
167 0.0301 0.0012 0.0289
168 0.0305 0.0012 0.0293
169 0.0294 0.0012 0.0282
170 0.0298 0.0012 0.0287
171 0.0308 0.0012 0.0296
172 0.0313 0.0012 0.0301
173 0.0324 0.0013 0.0311
174 0.0330 0.0013 0.0317
175 0.0343 0.0014 0.0329
176 0.0350 0.0014 0.0336
177 0.0365 0.0014 0.0351
178 0.0374 0.0015 0.0359
179 0.0393 0.0016 0.0377
180 0.0403 0.0016 0.0387
181 0.0427 0.0017 0.0410
182 0.0440 0.0017 0.0423
183 0.0471 0.0019 0.0453
184 0.0489 0.0019 0.0470
185 0.0561 0.0022 0.0539
186 0.0587 0.0023 0.0564
187 0.0653 0.0026 0.0627
188 0.0695 0.0028 0.0667
189 0.0787 0.0031 0.0756
190 0.0874 0.0035 0.0839
191 0.1189 0.0047 0.1141
192 0.1563 0.0062 0.1501
193 0.3930 0.0156 0.3774
194 0.0996 0.0040 0.0957
195 0.0747 0.0030 0.0717
196 0.0617 0.0024 0.0593
197 0.0510 0.0020 0.0489
198 0.0455 0.0018 0.0437
199 0.0414 0.0016 0.0398
200 0.0383 0.0015 0.0368
201 0.0357 0.0014 0.0343
202 0.0336 0.0013 0.0323
203 0.0319 0.0013 0.0306
204 0.0303 0.0012 0.0291
205 0.0309 0.0012 0.0297
206 0.0297 0.0012 0.0286
207 0.0287 0.0011 0.0275
208 0.0277 0.0011 0.0266
209 0.0269 0.0011 0.0258
210 0.0261 0.0010 0.0250

211 0.0254 0.0010 0.0243
212 0.0247 0.0010 0.0237
213 0.0241 0.0010 0.0231
214 0.0235 0.0009 0.0226
215 0.0230 0.0009 0.0221
216 0.0225 0.0009 0.0216
217 0.0221 0.0009 0.0213
218 0.0217 0.0009 0.0208
219 0.0213 0.0008 0.0205
220 0.0209 0.0008 0.0201
221 0.0205 0.0008 0.0197
222 0.0202 0.0008 0.0194
223 0.0199 0.0008 0.0191
224 0.0195 0.0008 0.0188
225 0.0192 0.0008 0.0185
226 0.0190 0.0008 0.0182
227 0.0187 0.0007 0.0179
228 0.0184 0.0007 0.0177
229 0.0182 0.0007 0.0174
230 0.0179 0.0007 0.0172
231 0.0177 0.0007 0.0170
232 0.0175 0.0007 0.0168
233 0.0172 0.0007 0.0166
234 0.0170 0.0007 0.0164
235 0.0168 0.0007 0.0162
236 0.0166 0.0007 0.0160
237 0.0165 0.0007 0.0158
238 0.0163 0.0006 0.0156
239 0.0161 0.0006 0.0155
240 0.0159 0.0006 0.0153
241 0.0158 0.0006 0.0151
242 0.0156 0.0006 0.0150
243 0.0155 0.0006 0.0148
244 0.0153 0.0006 0.0147
245 0.0152 0.0006 0.0146
246 0.0150 0.0006 0.0144
247 0.0149 0.0006 0.0143
248 0.0148 0.0006 0.0142
249 0.0146 0.0006 0.0140
250 0.0145 0.0006 0.0139
251 0.0144 0.0006 0.0138
252 0.0143 0.0006 0.0137
253 0.0141 0.0006 0.0136
254 0.0140 0.0006 0.0135
255 0.0139 0.0006 0.0134
256 0.0138 0.0005 0.0133
257 0.0137 0.0005 0.0132
258 0.0136 0.0005 0.0131
259 0.0135 0.0005 0.0130
260 0.0134 0.0005 0.0129

261 0.0133 0.0005 0.0128
262 0.0132 0.0005 0.0127
263 0.0131 0.0005 0.0126
264 0.0130 0.0005 0.0125
265 0.0129 0.0005 0.0124
266 0.0128 0.0005 0.0123
267 0.0128 0.0005 0.0123
268 0.0127 0.0005 0.0122
269 0.0126 0.0005 0.0121
270 0.0125 0.0005 0.0120
271 0.0124 0.0005 0.0119
272 0.0124 0.0005 0.0119
273 0.0123 0.0005 0.0118
274 0.0122 0.0005 0.0117
275 0.0121 0.0005 0.0116
276 0.0121 0.0005 0.0116
277 0.0120 0.0005 0.0115
278 0.0119 0.0005 0.0114
279 0.0118 0.0005 0.0114
280 0.0118 0.0005 0.0113
281 0.0117 0.0005 0.0113
282 0.0117 0.0005 0.0112
283 0.0116 0.0005 0.0111
284 0.0115 0.0005 0.0111
285 0.0115 0.0005 0.0110
286 0.0114 0.0005 0.0109
287 0.0113 0.0004 0.0109
288 0.0113 0.0004 0.0108
-------------------------------------------------------------------- -------------------------------------------------------------------- Total soil rain loss = 0.25(In)
Total effective rainfall = 6.12(In)
Peak flow rate in flood hydrograph = 6.93(CFS)
--------------------------------------------------------------------- ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 24 - H O U R S T O R M
R u n o f f H y d r o g r a p h
-------------------------------------------------------------------- Hydrograph in 5 Minute intervals ((CFS))
-------------------------------------------------------------------- Time(h+m) Volume Ac.Ft Q(CFS) 0 2.5 5.0 7.5 10.0
----------------------------------------------------------------------- 0+ 5 0.0001 0.02 Q | | | |
0+10 0.0008 0.10 Q | | | |
0+15 0.0025 0.24 Q | | | |
0+20 0.0046 0.31 VQ | | | |
0+25 0.0069 0.34 VQ | | | |
0+30 0.0093 0.34 VQ | | | |
0+35 0.0117 0.35 VQ | | | |

0+40 0.0141 0.35 VQ | | | |
0+45 0.0165 0.35 VQ | | | |
0+50 0.0189 0.35 VQ | | | |
0+55 0.0213 0.35 VQ | | | |
1+ 0 0.0238 0.35 VQ | | | |
1+ 5 0.0262 0.35 VQ | | | |
1+10 0.0286 0.35 VQ | | | |
1+15 0.0311 0.36 VQ | | | |
1+20 0.0336 0.36 VQ | | | |
1+25 0.0360 0.36 |Q | | | |
1+30 0.0385 0.36 |Q | | | |
1+35 0.0410 0.36 |Q | | | |
1+40 0.0434 0.36 |Q | | | |
1+45 0.0459 0.36 |Q | | | |
1+50 0.0484 0.36 |Q | | | |
1+55 0.0509 0.36 |Q | | | |
2+ 0 0.0535 0.36 |Q | | | |
2+ 5 0.0560 0.37 |Q | | | |
2+10 0.0585 0.37 |Q | | | |
2+15 0.0610 0.37 |Q | | | |
2+20 0.0636 0.37 |Q | | | |
2+25 0.0661 0.37 |Q | | | |
2+30 0.0687 0.37 |QV | | | |
2+35 0.0712 0.37 |QV | | | |
2+40 0.0738 0.37 |QV | | | |
2+45 0.0764 0.37 |QV | | | |
2+50 0.0790 0.38 |QV | | | |
2+55 0.0816 0.38 |QV | | | |
3+ 0 0.0842 0.38 |QV | | | |
3+ 5 0.0868 0.38 |QV | | | |
3+10 0.0894 0.38 |QV | | | |
3+15 0.0920 0.38 |QV | | | |
3+20 0.0947 0.38 |QV | | | |
3+25 0.0973 0.38 |QV | | | |
3+30 0.1000 0.39 |QV | | | |
3+35 0.1026 0.39 |Q V | | | |
3+40 0.1053 0.39 |Q V | | | |
3+45 0.1080 0.39 |Q V | | | |
3+50 0.1107 0.39 |Q V | | | |
3+55 0.1134 0.39 |Q V | | | |
4+ 0 0.1161 0.39 |Q V | | | |
4+ 5 0.1188 0.39 |Q V | | | |
4+10 0.1215 0.40 |Q V | | | |
4+15 0.1243 0.40 |Q V | | | |
4+20 0.1270 0.40 |Q V | | | |
4+25 0.1298 0.40 |Q V | | | |
4+30 0.1325 0.40 |Q V | | | |
4+35 0.1353 0.40 |Q V | | | |
4+40 0.1381 0.40 |Q V | | | |
4+45 0.1409 0.41 |Q V | | | |

4+50 0.1437 0.41 |Q V | | | |
4+55 0.1465 0.41 |Q V | | | |
5+ 0 0.1493 0.41 |Q V | | | |
5+ 5 0.1521 0.41 |Q V | | | |
5+10 0.1550 0.41 |Q V | | | |
5+15 0.1578 0.41 |Q V | | | |
5+20 0.1607 0.42 |Q V | | | |
5+25 0.1636 0.42 |Q V | | | |
5+30 0.1665 0.42 |Q V | | | |
5+35 0.1694 0.42 |Q V | | | |
5+40 0.1723 0.42 |Q V | | | |
5+45 0.1752 0.42 |Q V | | | |
5+50 0.1781 0.43 |Q V | | | |
5+55 0.1811 0.43 |Q V | | | |
6+ 0 0.1840 0.43 |Q V | | | |
6+ 5 0.1870 0.43 |Q V | | | |
6+10 0.1900 0.43 |Q V | | | |
6+15 0.1929 0.43 |Q V | | | |
6+20 0.1959 0.44 |Q V | | | |
6+25 0.1990 0.44 |Q V | | | |
6+30 0.2020 0.44 |Q V | | | |
6+35 0.2050 0.44 |Q V | | | |
6+40 0.2081 0.44 |Q V | | | |
6+45 0.2112 0.45 |Q V | | | |
6+50 0.2142 0.45 |Q V | | | |
6+55 0.2173 0.45 |Q V | | | |
7+ 0 0.2204 0.45 |Q V | | | |
7+ 5 0.2236 0.45 |Q V | | | |
7+10 0.2267 0.46 |Q V | | | |
7+15 0.2298 0.46 |Q V | | | |
7+20 0.2330 0.46 |Q V | | | |
7+25 0.2362 0.46 |Q V | | | |
7+30 0.2394 0.46 |Q V | | | |
7+35 0.2426 0.47 |Q V | | | |
7+40 0.2458 0.47 |Q V | | | |
7+45 0.2491 0.47 |Q V | | | |
7+50 0.2523 0.47 |Q V | | | |
7+55 0.2556 0.48 |Q V | | | |
8+ 0 0.2589 0.48 |Q V | | | |
8+ 5 0.2622 0.48 |Q V | | | |
8+10 0.2655 0.48 |Q V | | | |
8+15 0.2688 0.48 |Q V | | | |
8+20 0.2722 0.49 |Q V | | | |
8+25 0.2756 0.49 |Q V | | | |
8+30 0.2789 0.49 |Q V | | | |
8+35 0.2824 0.49 |Q V | | | |
8+40 0.2858 0.50 |Q V | | | |
8+45 0.2892 0.50 | Q V | | | |
8+50 0.2927 0.50 | Q V | | | |
8+55 0.2962 0.51 | Q V | | | |

9+ 0 0.2997 0.51 | Q V | | | |
9+ 5 0.3032 0.51 | Q V| | | |
9+10 0.3067 0.51 | Q V| | | |
9+15 0.3103 0.52 | Q V| | | |
9+20 0.3139 0.52 | Q V| | | |
9+25 0.3175 0.52 | Q V| | | |
9+30 0.3211 0.53 | Q V| | | |
9+35 0.3248 0.53 | Q V| | | |
9+40 0.3285 0.53 | Q V| | | |
9+45 0.3322 0.54 | Q V| | | |
9+50 0.3359 0.54 | Q V| | | |
9+55 0.3396 0.54 | Q V | | |
10+ 0 0.3434 0.55 | Q V | | |
10+ 5 0.3472 0.55 | Q V | | |
10+10 0.3510 0.55 | Q V | | |
10+15 0.3549 0.56 | Q V | | |
10+20 0.3587 0.56 | Q V | | |
10+25 0.3626 0.57 | Q V | | |
10+30 0.3666 0.57 | Q V | | |
10+35 0.3705 0.57 | Q |V | | |
10+40 0.3745 0.58 | Q |V | | |
10+45 0.3785 0.58 | Q |V | | |
10+50 0.3826 0.59 | Q |V | | |
10+55 0.3866 0.59 | Q |V | | |
11+ 0 0.3907 0.60 | Q |V | | |
11+ 5 0.3949 0.60 | Q |V | | |
11+10 0.3991 0.61 | Q |V | | |
11+15 0.4033 0.61 | Q |V | | |
11+20 0.4075 0.62 | Q | V | | |
11+25 0.4118 0.62 | Q | V | | |
11+30 0.4161 0.63 | Q | V | | |
11+35 0.4205 0.63 | Q | V | | |
11+40 0.4248 0.64 | Q | V | | |
11+45 0.4293 0.64 | Q | V | | |
11+50 0.4337 0.65 | Q | V | | |
11+55 0.4383 0.66 | Q | V | | |
12+ 0 0.4428 0.66 | Q | V | | |
12+ 5 0.4474 0.67 | Q | V | | |
12+10 0.4521 0.67 | Q | V | | |
12+15 0.4567 0.68 | Q | V | | |
12+20 0.4615 0.69 | Q | V | | |
12+25 0.4662 0.69 | Q | V | | |
12+30 0.4710 0.70 | Q | V | | |
12+35 0.4759 0.71 | Q | V | | |
12+40 0.4809 0.72 | Q | V | | |
12+45 0.4858 0.72 | Q | V | | |
12+50 0.4909 0.73 | Q | V | | |
12+55 0.4960 0.74 | Q | V | | |
13+ 0 0.5012 0.75 | Q | V | | |
13+ 5 0.5064 0.76 | Q | V | | |

13+10 0.5117 0.77 | Q | V | | |
13+15 0.5171 0.78 | Q | V | | |
13+20 0.5226 0.79 | Q | V | | |
13+25 0.5281 0.80 | Q | V | | |
13+30 0.5337 0.82 | Q | V | | |
13+35 0.5394 0.83 | Q | V | | |
13+40 0.5452 0.84 | Q | V | | |
13+45 0.5511 0.86 | Q | V | | |
13+50 0.5571 0.87 | Q | V | | |
13+55 0.5632 0.89 | Q | V | | |
14+ 0 0.5694 0.90 | Q | V | | |
14+ 5 0.5758 0.92 | Q | V | | |
14+10 0.5821 0.92 | Q | V | | |
14+15 0.5884 0.92 | Q | V | | |
14+20 0.5947 0.92 | Q | V | | |
14+25 0.6012 0.94 | Q | V | | |
14+30 0.6079 0.96 | Q | V | | |
14+35 0.6147 0.99 | Q | V | | |
14+40 0.6217 1.02 | Q | V | | |
14+45 0.6289 1.05 | Q | V | | |
14+50 0.6363 1.08 | Q | V | | |
14+55 0.6439 1.11 | Q | V| | |
15+ 0 0.6519 1.15 | Q | V| | |
15+ 5 0.6601 1.19 | Q | V| | |
15+10 0.6687 1.24 | Q | V| | |
15+15 0.6776 1.30 | Q | V | |
15+20 0.6870 1.36 | Q | V | |
15+25 0.6968 1.44 | Q | V | |
15+30 0.7075 1.54 | Q | |V | |
15+35 0.7190 1.68 | Q | |V | |
15+40 0.7315 1.82 | Q | |V | |
15+45 0.7451 1.98 | Q | | V | |
15+50 0.7600 2.16 | Q | | V | |
15+55 0.7768 2.43 | Q| | V | |
16+ 0 0.7968 2.91 | |Q | V | |
16+ 5 0.8243 3.99 | | Q | V | |
16+10 0.8662 6.10 | | | QV | |
16+15 0.9139 6.93 | | | Q | |
16+20 0.9471 4.82 | | Q| V | |
16+25 0.9682 3.06 | | Q | V | |
16+30 0.9830 2.16 | Q | | V| |
16+35 0.9953 1.78 | Q | | V| |
16+40 1.0054 1.46 | Q | | V| |
16+45 1.0144 1.31 | Q | | V |
16+50 1.0226 1.20 | Q | | V |
16+55 1.0303 1.11 | Q | | V |
17+ 0 1.0375 1.04 | Q | | V |
17+ 5 1.0443 0.99 | Q | | |V |
17+10 1.0509 0.96 | Q | | |V |
17+15 1.0573 0.94 | Q | | |V |

17+20 1.0636 0.91 | Q | | |V |
17+25 1.0697 0.88 | Q | | |V |
17+30 1.0756 0.85 | Q | | |V |
17+35 1.0813 0.83 | Q | | | V |
17+40 1.0868 0.80 | Q | | | V |
17+45 1.0922 0.78 | Q | | | V |
17+50 1.0974 0.76 | Q | | | V |
17+55 1.1025 0.74 | Q | | | V |
18+ 0 1.1075 0.72 | Q | | | V |
18+ 5 1.1124 0.71 | Q | | | V |
18+10 1.1171 0.69 | Q | | | V |
18+15 1.1218 0.68 | Q | | | V |
18+20 1.1264 0.67 | Q | | | V |
18+25 1.1309 0.65 | Q | | | V |
18+30 1.1354 0.64 | Q | | | V |
18+35 1.1397 0.63 | Q | | | V |
18+40 1.1440 0.62 | Q | | | V |
18+45 1.1482 0.61 | Q | | | V |
18+50 1.1523 0.60 | Q | | | V |
18+55 1.1564 0.59 | Q | | | V |
19+ 0 1.1604 0.58 | Q | | | V |
19+ 5 1.1643 0.57 | Q | | | V |
19+10 1.1682 0.57 | Q | | | V |
19+15 1.1721 0.56 | Q | | | V |
19+20 1.1759 0.55 | Q | | | V |
19+25 1.1796 0.54 | Q | | | V |
19+30 1.1833 0.54 | Q | | | V |
19+35 1.1870 0.53 | Q | | | V |
19+40 1.1906 0.52 | Q | | | V |
19+45 1.1941 0.52 | Q | | | V |
19+50 1.1976 0.51 | Q | | | V |
19+55 1.2011 0.51 | Q | | | V |
20+ 0 1.2046 0.50 |Q | | | V |
20+ 5 1.2080 0.49 |Q | | | V |
20+10 1.2113 0.49 |Q | | | V |
20+15 1.2147 0.48 |Q | | | V |
20+20 1.2180 0.48 |Q | | | V |
20+25 1.2212 0.47 |Q | | | V |
20+30 1.2245 0.47 |Q | | | V |
20+35 1.2277 0.47 |Q | | | V |
20+40 1.2309 0.46 |Q | | | V |
20+45 1.2340 0.46 |Q | | | V |
20+50 1.2371 0.45 |Q | | | V |
20+55 1.2402 0.45 |Q | | | V |
21+ 0 1.2433 0.45 |Q | | | V |
21+ 5 1.2463 0.44 |Q | | | V |
21+10 1.2493 0.44 |Q | | | V |
21+15 1.2523 0.43 |Q | | | V |
21+20 1.2553 0.43 |Q | | | V |
21+25 1.2582 0.43 |Q | | | V |

21+30 1.2612 0.42 |Q | | | V |
21+35 1.2641 0.42 |Q | | | V |
21+40 1.2669 0.42 |Q | | | V |
21+45 1.2698 0.41 |Q | | | V |
21+50 1.2726 0.41 |Q | | | V |
21+55 1.2754 0.41 |Q | | | V |
22+ 0 1.2782 0.41 |Q | | | V |
22+ 5 1.2810 0.40 |Q | | | V |
22+10 1.2837 0.40 |Q | | | V |
22+15 1.2865 0.40 |Q | | | V |
22+20 1.2892 0.39 |Q | | | V |
22+25 1.2919 0.39 |Q | | | V |
22+30 1.2945 0.39 |Q | | | V |
22+35 1.2972 0.39 |Q | | | V |
22+40 1.2999 0.38 |Q | | | V |
22+45 1.3025 0.38 |Q | | | V |
22+50 1.3051 0.38 |Q | | | V |
22+55 1.3077 0.38 |Q | | | V |
23+ 0 1.3103 0.37 |Q | | | V |
23+ 5 1.3128 0.37 |Q | | | V|
23+10 1.3154 0.37 |Q | | | V|
23+15 1.3179 0.37 |Q | | | V|
23+20 1.3204 0.37 |Q | | | V|
23+25 1.3229 0.36 |Q | | | V|
23+30 1.3254 0.36 |Q | | | V|
23+35 1.3279 0.36 |Q | | | V|
23+40 1.3304 0.36 |Q | | | V|
23+45 1.3328 0.36 |Q | | | V|
23+50 1.3352 0.35 |Q | | | V|
23+55 1.3377 0.35 |Q | | | V|
24+ 0 1.3401 0.35 |Q | | | V|
-----------------------------------------------------------------------

U n i t H y d r o g r a p h A n a l y s i s
Copyright (c) CIVILCADD/CIVILDESIGN, 1989-2018, Version 9.0 Study date 03/11/25 File Name CV164P100.out
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ ------------------------------------------------------------------------ Orange County Unit Hydrograph Hydrology Method
Manual Date(s) - October 1986, November 1996
Program License Serial Number 6677
--------------------------------------------------------------------- TTM 19389

YORBA LINDA
PROPOSED Q100

PRELIMINARY
-------------------------------------------------------------------- Storm Event Year = 100
Antecedent Moisture Condition = 3
English (in-lb) Input Units Used
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ ******** Area-averaged max loss rate, Fm ********
SCS curve Area Area Soil Fp Ap Fm
No.(AMCII) (Ac.) Fraction Group (In/Hr) (dec.) (In/Hr)

69.0 2.6 1.00 C 0.250 0.150 0.037
Area-averaged adjusted loss rate Fm (In/Hr) = 0.037
********* Area-Averaged low loss rate fraction, Yb ********** Area Area SCS CN SCS CN S Pervious
(Ac.) Fract (AMC2) (AMC3) Yield Fr

0.40 0.150 69.0 86.2 1.60 0.751

2.24 0.850 98.0 98.0 0.20 0.963
Area-averaged catchment yield fraction, Y = 0.931
Area-averaged low loss fraction, Yb = 0.069
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

User entry of time of concentration = 0.207 (hours)
Watershed area = 2.64(Ac.)
Catchment Lag time = 0.166 hours
Unit interval = 5.000 minutes
Unit interval percentage of lag time = 50.2008
Hydrograph baseflow = 0.00(CFS)
Average maximum watershed loss rate(Fm) = 0.087(In/Hr)
Average low loss rate fraction (Yb) = 0.069 (decimal)
Note: user entry of the Fm value
VALLEY DEVELOPED S-Graph Selected
Computed peak 5-minute rainfall = 0.393(In)
Computed peak 30-minute rainfall = 0.934(In)
Specified peak 1-hour rainfall = 1.320(In)
Computed peak 3-hour rainfall = 2.220(In)
Specified peak 6-hour rainfall = 3.150(In)
Specified peak 24-hour rainfall = 6.370(In)
Note: user specified rainfall values used.

Rainfall depth area reduction factors:

Using a total area of 2.64(Ac.) (Ref: fig. E-4)
5-minute factor = 1.000 Adjusted rainfall = 0.393(In)
30-minute factor = 1.000 Adjusted rainfall = 0.934(In)
1-hour factor = 1.000 Adjusted rainfall = 1.320(In)
3-hour factor = 1.000 Adjusted rainfall = 2.220(In)
6-hour factor = 1.000 Adjusted rainfall = 3.150(In)
24-hour factor = 1.000 Adjusted rainfall = 6.370(In)
--------------------------------------------------------------------- U n i t H y d r o g r a p h
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Interval 'S' Graph Unit Hydrograph
Number Mean values ((CFS))
--------------------------------------------------------------------- (K = 31.93 (CFS))
1 4.612 1.473
2 30.030 8.115
3 69.112 12.478
4 90.098 6.700
5 97.075 2.228
6 98.770 0.541
7 100.000 0.393
--------------------------------------------------------------------- Peak Unit Adjusted mass rainfall Unit rainfall
Number (In) (In)
1 0.3930 0.3930
2 0.5493 0.1563
3 0.6681 0.1189

4 0.7677 0.0996
5 0.8551 0.0874
6 0.9339 0.0787
7 1.0086 0.0747
8 1.0781 0.0695
9 1.1433 0.0653
10 1.2051 0.0617
11 1.2638 0.0587
12 1.3198 0.0561
13 1.3708 0.0510
14 1.4197 0.0489
15 1.4669 0.0471
16 1.5124 0.0455
17 1.5564 0.0440
18 1.5991 0.0427
19 1.6405 0.0414
20 1.6808 0.0403
21 1.7201 0.0393
22 1.7584 0.0383
23 1.7958 0.0374
24 1.8323 0.0365
25 1.8681 0.0357
26 1.9031 0.0350
27 1.9374 0.0343
28 1.9710 0.0336
29 2.0040 0.0330
30 2.0364 0.0324
31 2.0683 0.0319
32 2.0996 0.0313
33 2.1304 0.0308
34 2.1607 0.0303
35 2.1906 0.0298
36 2.2200 0.0294
37 2.2509 0.0309
38 2.2814 0.0305
39 2.3115 0.0301
40 2.3412 0.0297
41 2.3706 0.0294
42 2.3996 0.0290
43 2.4283 0.0287
44 2.4566 0.0283
45 2.4847 0.0280
46 2.5124 0.0277
47 2.5398 0.0274
48 2.5669 0.0271
49 2.5938 0.0269
50 2.6204 0.0266
51 2.6467 0.0263
52 2.6728 0.0261
53 2.6986 0.0258

54 2.7242 0.0256
55 2.7495 0.0254
56 2.7747 0.0251
57 2.7996 0.0249
58 2.8243 0.0247
59 2.8487 0.0245
60 2.8730 0.0243
61 2.8971 0.0241
62 2.9210 0.0239
63 2.9446 0.0237
64 2.9681 0.0235
65 2.9915 0.0233
66 3.0146 0.0231
67 3.0376 0.0230
68 3.0604 0.0228
69 3.0830 0.0226
70 3.1055 0.0225
71 3.1278 0.0223
72 3.1500 0.0222
73 3.1721 0.0221
74 3.1941 0.0220
75 3.2160 0.0219
76 3.2377 0.0217
77 3.2593 0.0216
78 3.2807 0.0214
79 3.3020 0.0213
80 3.3232 0.0212
81 3.3442 0.0210
82 3.3651 0.0209
83 3.3859 0.0208
84 3.4065 0.0207
85 3.4271 0.0205
86 3.4475 0.0204
87 3.4678 0.0203
88 3.4880 0.0202
89 3.5081 0.0201
90 3.5281 0.0200
91 3.5479 0.0199
92 3.5677 0.0198
93 3.5873 0.0196
94 3.6068 0.0195
95 3.6263 0.0194
96 3.6456 0.0193
97 3.6649 0.0192
98 3.6840 0.0191
99 3.7031 0.0190
100 3.7220 0.0190
101 3.7409 0.0189
102 3.7596 0.0188
103 3.7783 0.0187

104 3.7969 0.0186
105 3.8154 0.0185
106 3.8338 0.0184
107 3.8522 0.0183
108 3.8704 0.0182
109 3.8886 0.0182
110 3.9067 0.0181
111 3.9247 0.0180
112 3.9426 0.0179
113 3.9604 0.0178
114 3.9782 0.0178
115 3.9959 0.0177
116 4.0135 0.0176
117 4.0310 0.0175
118 4.0485 0.0175
119 4.0659 0.0174
120 4.0832 0.0173
121 4.1004 0.0172
122 4.1176 0.0172
123 4.1347 0.0171
124 4.1518 0.0170
125 4.1688 0.0170
126 4.1857 0.0169
127 4.2025 0.0168
128 4.2193 0.0168
129 4.2360 0.0167
130 4.2526 0.0166
131 4.2692 0.0166
132 4.2858 0.0165
133 4.3022 0.0165
134 4.3186 0.0164
135 4.3350 0.0163
136 4.3512 0.0163
137 4.3675 0.0162
138 4.3836 0.0162
139 4.3997 0.0161
140 4.4158 0.0161
141 4.4318 0.0160
142 4.4477 0.0159
143 4.4636 0.0159
144 4.4794 0.0158
145 4.4952 0.0158
146 4.5109 0.0157
147 4.5266 0.0157
148 4.5422 0.0156
149 4.5578 0.0156
150 4.5733 0.0155
151 4.5887 0.0155
152 4.6042 0.0154
153 4.6195 0.0154