Agenda, first session — Lynwood City Council, May 5, 2026 (part 3 of 3)

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ANALYTICAL REPORT FOR SAMPLES
Date Received
212102001_Composite T230311-07 Soil 01/30/23 14:04 02/03/23 12:26 Joann Marroquin, Director of Operations
SunStar Laboratories, Inc. The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety.

Page 1 of 14 ends

Project:

Project Number:

Project Manager:

Reported:

Ninyo & Moore
475 Goddard, Ste. 200 212102001
Jennifer Schmidt
Lynwood Park
02/09/23 16:29Irvine CA, 92618
25712 Commercentre Drive
Lake Forest, California 92630
949.297.5020 Phone
949.297.5027 Fax

DETECTIONS SUMMARY
Laboratory ID:

Analyte Result Limit Units Method
T230311-07212102001_Composite
Notes
Reporting
Sample ID:

Barium 130 1.0 mg/kg EPA 6010b
Chromium 16 2.0 mg/kg EPA 6010b
Cobalt 11 2.0 mg/kg EPA 6010b
Copper 29 1.0 mg/kg EPA 6010b
Lead 4.1 3.0 mg/kg EPA 6010b
Nickel 12 2.0 mg/kg EPA 6010b
Vanadium 39 5.0 mg/kg EPA 6010b
Zinc 58 1.0 mg/kg EPA 6010b
Joann Marroquin, Director of Operations
SunStar Laboratories, Inc. The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety.

Page 2 of 14 ends

Project:

Project Number:

Project Manager:

Reported:

Ninyo & Moore
475 Goddard, Ste. 200 212102001
Jennifer Schmidt
Lynwood Park
02/09/23 16:29Irvine CA, 92618
25712 Commercentre Drive
Lake Forest, California 92630
949.297.5020 Phone
949.297.5027 Fax
ResultAnalyte Limit Batch
Reporting
Prepared Analyzed Method Notes DilutionUnits
212102001_Composite
T230311-07 (Soil)
SunStar Laboratories, Inc.

Extractable Petroleum Hydrocarbons by 8015B
ND EPA 8015B02/03/23 02/06/23 mg/kg 23B00691C6-C12 (GRO) 10 ND "" "" ""C13-C28 (DRO) 10
ND "" "" ""C29-C40 (MORO) 10
"" " "65-13593.9 %Surrogate: p-Terphenyl
Metals by EPA 6010B
ND EPA 6010b02/03/23 02/09/23 mg/kg 23B00571Antimony 4.0 ND "" "" ""Silver 2.0
ND "" "" ""Arsenic 5.0
"130 " " "" "Barium 1.0
ND "" 02/09/23 " ""Beryllium 1.0
ND "" 02/09/23 " ""Cadmium 2.0
"16 " " "" "Chromium 2.0
"11 " " "" "Cobalt 2.0
"29 " " "" "Copper 1.0
"4.1 " " "" "Lead 3.0
ND "" "" ""Molybdenum 5.0
"12 " " "" "Nickel 2.0
ND "" "" ""Selenium 5.0
ND "" "" ""Thallium 5.0
"39 " " "" "Vanadium 5.0
"58 " " "" "Zinc 1.0
Cold Vapor Extraction EPA 7470/7471
ND EPA 7471A
Soil
02/03/23 02/07/23 mg/kg 23B00581Mercury 0.10
Joann Marroquin, Director of Operations
SunStar Laboratories, Inc. The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety.

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Project:

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Project Manager:

Reported:

Volatile Organic Compounds by EPA Method 8260B
ND EPA 8260B02/03/23 02/04/23 ug/kg 23B00521Bromobenzene 2.5 ND "" "" ""Bromochloromethane 2.5
ND "" "" ""Bromodichloromethane 2.5
ND "" "" ""Bromoform 2.5
ND "" "" ""Bromomethane 2.5
ND "" "" ""n-Butylbenzene 2.5
ND "" "" ""sec-Butylbenzene 2.5
ND "" "" ""tert-Butylbenzene 2.5
ND "" "" ""Carbon tetrachloride 2.5
ND "" "" ""Chlorobenzene 2.5
ND "" "" ""Chloroethane 2.5
ND "" "" ""Chloroform 2.5
ND "" "" ""Chloromethane 2.5
ND "" "" ""2-Chlorotoluene 2.5
ND "" "" ""4-Chlorotoluene 2.5
ND "" "" ""Dibromochloromethane 2.5
ND "" "" ""1,2-Dibromo-3-chloropropane 5.0
ND "" "" ""1,2-Dibromoethane (EDB) 2.5
ND "" "" ""Dibromomethane 2.5
ND "" "" ""1,2-Dichlorobenzene 2.5
ND "" "" ""1,3-Dichlorobenzene 2.5
ND "" "" ""1,4-Dichlorobenzene 2.5
ND "" "" ""Dichlorodifluoromethane 2.5
ND "" "" ""1,1-Dichloroethane 2.5
ND "" "" ""1,2-Dichloroethane 2.5
ND "" "" ""1,1-Dichloroethene 2.5
ND "" "" ""cis-1,2-Dichloroethene 2.5
ND "" "" ""trans-1,2-Dichloroethene 2.5
ND "" "" ""1,2-Dichloropropane 2.5
ND "" "" ""1,3-Dichloropropane 2.5
ND "" "" ""2,2-Dichloropropane 2.5
ND "" "" ""1,1-Dichloropropene 2.5
Joann Marroquin, Director of Operations
SunStar Laboratories, Inc. The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety.

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Reported:

Volatile Organic Compounds by EPA Method 8260B
ND EPA 8260B02/03/23 02/04/23 ug/kg 23B00521cis-1,3-Dichloropropene 2.5 ND "" "" ""trans-1,3-Dichloropropene 2.5
ND "" "" ""Hexachlorobutadiene 2.5
ND "" "" ""Isopropylbenzene 2.5
ND "" "" ""p-Isopropyltoluene 2.5
ND "" "" ""Methylene chloride 10
ND "" "" ""Naphthalene 2.5
ND "" "" ""n-Propylbenzene 2.5
ND "" "" ""Styrene 2.5
ND "" "" ""1,1,2,2-Tetrachloroethane 2.5
ND "" "" ""1,1,1,2-Tetrachloroethane 2.5
ND "" "" ""Tetrachloroethene 2.5
ND "" "" ""1,2,3-Trichlorobenzene 2.5
ND "" "" ""1,2,4-Trichlorobenzene 2.5
ND "" "" ""1,1,2-Trichloroethane 2.5
ND "" "" ""1,1,1-Trichloroethane 2.5
ND "" "" ""Trichloroethene 2.5
ND "" "" ""Trichlorofluoromethane 2.5
ND "" "" ""1,2,3-Trichloropropane 2.5
ND "" "" ""1,3,5-Trimethylbenzene 2.5
ND "" "" ""1,2,4-Trimethylbenzene 2.5
ND "" "" ""Vinyl chloride 2.5
ND "" "" ""Benzene 2.5
ND "" "" ""Toluene 2.5
ND "" "" ""Ethylbenzene 2.5
ND "" "" ""m,p-Xylene 5.0
ND "" "" ""o-Xylene 2.5
ND "" "" ""Acetone 5.0
ND "" "" ""Methyl ethyl ketone 5.0
ND "" "" ""Methyl isobutyl ketone 5.0
ND "" "" ""2-Hexanone (MBK) 5.0
"" " "75.4-139124 %Surrogate: 4-Bromofluorobenzene
Joann Marroquin, Director of Operations
SunStar Laboratories, Inc. The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety.

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Reported:

Volatile Organic Compounds by EPA Method 8260B
EP A 8260B23B0052 02/03/23 02/04/23 73.1-125112 %Surrogate: Dibromofluoromethane "" " "82.6-11799.8 %Surrogate: Toluene-d8
Joann Marroquin, Director of Operations
SunStar Laboratories, Inc. The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety.

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Project:

Project Number:

Project Manager:

Reported:

Ninyo & Moore
475 Goddard, Ste. 200 212102001
Jennifer Schmidt
Lynwood Park
02/09/23 16:29Irvine CA, 92618
25712 Commercentre Drive
Lake Forest, California 92630
949.297.5020 Phone
949.297.5027 Fax
Result Limit
Reporting
Units Level
Spike
Result
Source
%REC
%REC
Limits RPD
RPD
Limit Notes Analyte
Extractable Petroleum Hydrocarbons by 8015B - Quality Control SunStar Laboratories, Inc.

Batch 23B0069 - EPA 3550B GC
Blank (23B0069-BLK1) Prepared: 02/03/23 Analyzed: 02/06/23 C6-C12 (GRO) mg/kgND 10
C13-C28 (DRO) "ND 10
C29-C40 (MORO) "ND 10
" 100 65-135Surrogate: p-Terphenyl 92.992.9
LCS (23B0069-BS1) Prepared: 02/03/23 Analyzed: 02/06/23 C13-C28 (DRO) mg/kg470 10 75-125
" 100 65-135Surrogate: p-Terphenyl 98.998.9
LCS Dup (23B0069-BSD1) Prepared: 02/03/23 Analyzed: 02/06/23 C13-C28 (DRO) mg/kg480 10 2075-125 2.38
" 100 65-135Surrogate: p-Terphenyl 106106
Joann Marroquin, Director of Operations
SunStar Laboratories, Inc. The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety.

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Project:

Project Number:

Project Manager:

Reported:

Ninyo & Moore
475 Goddard, Ste. 200 212102001
Jennifer Schmidt
Lynwood Park
02/09/23 16:29Irvine CA, 92618
25712 Commercentre Drive
Lake Forest, California 92630
949.297.5020 Phone
949.297.5027 Fax
Result Limit
Reporting
Units Level
Spike
Result
Source
%REC
%REC
Limits RPD
RPD
Limit Notes Analyte
Metals by EPA 6010B - Quality Control
SunStar Laboratories, Inc.

Batch 23B0057 - EPA 3050B
Blank (23B0057-BLK1) Prepared: 02/03/23 Analyzed: 02/09/23 Antimony mg/kgND 4.0
Silver "ND 2.0
Arsenic "ND 5.0
Barium "ND 1.0
Beryllium "ND 1.0
Cadmium "ND 2.0
Chromium "ND 2.0
Cobalt "ND 2.0
Copper "ND 1.0
Lead "ND 3.0
Molybdenum "ND 5.0
Nickel "ND 2.0
Selenium "ND 5.0
Thallium "ND 5.0
Vanadium "ND 5.0
Zinc "ND 1.0
LCS (23B0057-BS1) Prepared: 02/03/23 Analyzed: 02/09/23 Arsenic mg/kg102 5.0 100 75-125102
Barium "105 1.0 100 75-125105
Cadmium "107 2.0 100 75-125107
Chromium "108 2.0 100 75-125108
Lead "106 3.0 100 75-125106
Matrix Spike (23B0057-MS1) Prepared: 02/03/23 Analyzed: 02/09/23 Source: T230291-01 Arsenic mg/kg81.5 5.0 100 ND 75-12581.5
Barium "166 1.0 100 82.7 75-12583.6
Cadmium "77.7 2.0 100 ND 75-12577.7
Chromium "112 2.0 100 19.0 75-12592.7
Lead "95.7 3.0 100 14.5 75-12581.2
Joann Marroquin, Director of Operations
SunStar Laboratories, Inc. The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety.

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Project:

Project Number:

Project Manager:

Reported:

Ninyo & Moore
475 Goddard, Ste. 200 212102001
Jennifer Schmidt
Lynwood Park
02/09/23 16:29Irvine CA, 92618
25712 Commercentre Drive
Lake Forest, California 92630
949.297.5020 Phone
949.297.5027 Fax
Result Limit
Reporting
Units Level
Spike
Result
Source
%REC
%REC
Limits RPD
RPD
Limit Notes Analyte
Metals by EPA 6010B - Quality Control
SunStar Laboratories, Inc.

Batch 23B0057 - EPA 3050B
Matrix Spike Dup (23B0057-MSD1) Prepared: 02/03/23 Analyzed: 02/09/23 Source: T230291-01 Arsenic mg/kg86.0 5.0 100 ND 2075-12586.0 5.31
Barium "176 1.0 100 82.7 2075-12592.9 5.48
Cadmium "80.8 2.0 100 ND 2075-12580.8 3.93
Chromium "101 2.0 100 19.0 2075-12581.8 10.2
Lead "88.9 3.0 100 14.5 20 QM-0775-12574.4 7.38
Joann Marroquin, Director of Operations
SunStar Laboratories, Inc. The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety.

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Project:

Project Number:

Project Manager:

Reported:

Ninyo & Moore
475 Goddard, Ste. 200 212102001
Jennifer Schmidt
Lynwood Park
02/09/23 16:29Irvine CA, 92618
25712 Commercentre Drive
Lake Forest, California 92630
949.297.5020 Phone
949.297.5027 Fax
Result Limit
Reporting
Units Level
Spike
Result
Source
%REC
%REC
Limits RPD
RPD
Limit Notes Analyte
Cold Vapor Extraction EPA 7470/7471 - Quality Control
SunStar Laboratories, Inc.

Batch 23B0058 - EPA 7471A Soil
Blank (23B0058-BLK1) Prepared: 02/03/23 Analyzed: 02/07/23 Mercury mg/kgND 0.10
LCS (23B0058-BS1) Prepared: 02/03/23 Analyzed: 02/07/23 Mercury mg/kg0.447 0.10 0.397 80-120113
Matrix Spike (23B0058-MS1) Prepared: 02/03/23 Analyzed: 02/07/23 Source: T230291-02 Mercury mg/kg0.426 0.10 0.385 ND 75-125111
Matrix Spike Dup (23B0058-MSD1) Prepared: 02/03/23 Analyzed: 02/07/23 Source: T230291-02 Mercury mg/kg0.475 0.10 0.417 ND 2075-125114 10.7
Joann Marroquin, Director of Operations
SunStar Laboratories, Inc. The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety.

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Project:

Project Number:

Project Manager:

Reported:

Ninyo & Moore
475 Goddard, Ste. 200 212102001
Jennifer Schmidt
Lynwood Park
02/09/23 16:29Irvine CA, 92618
25712 Commercentre Drive
Lake Forest, California 92630
949.297.5020 Phone
949.297.5027 Fax
Result Limit
Reporting
Units Level
Spike
Result
Source
%REC
%REC
Limits RPD
RPD
Limit Notes Analyte
Volatile Organic Compounds by EPA Method 8260B - Quality Control SunStar Laboratories, Inc.

Batch 23B0052 - EPA 5030 GCMS
Blank (23B0052-BLK1) Prepared: 02/02/23 Analyzed: 02/03/23 Bromobenzene ug/kgND 2.5
Bromochloromethane "ND 2.5
Bromodichloromethane "ND 2.5
Bromoform "ND 2.5
Bromomethane "ND 2.5
n-Butylbenzene "ND 2.5
sec-Butylbenzene "ND 2.5
tert-Butylbenzene "ND 2.5
Carbon tetrachloride "ND 2.5
Chlorobenzene "ND 2.5
Chloroethane "ND 2.5
Chloroform "ND 2.5
Chloromethane "ND 2.5
2-Chlorotoluene "ND 2.5
4-Chlorotoluene "ND 2.5
Dibromochloromethane "ND 2.5
1,2-Dibromo-3-chloropropane "ND 5.0
1,2-Dibromoethane (EDB) "ND 2.5
Dibromomethane "ND 2.5
1,2-Dichlorobenzene "ND 2.5
1,3-Dichlorobenzene "ND 2.5
1,4-Dichlorobenzene "ND 2.5
Dichlorodifluoromethane "ND 2.5
1,1-Dichloroethane "ND 2.5
1,2-Dichloroethane "ND 2.5
1,1-Dichloroethene "ND 2.5
cis-1,2-Dichloroethene "ND 2.5
trans-1,2-Dichloroethene "ND 2.5
1,2-Dichloropropane "ND 2.5
1,3-Dichloropropane "ND 2.5
2,2-Dichloropropane "ND 2.5
1,1-Dichloropropene "ND 2.5
cis-1,3-Dichloropropene "ND 2.5
trans-1,3-Dichloropropene "ND 2.5
Hexachlorobutadiene "ND 2.5
Isopropylbenzene "ND 2.5
Joann Marroquin, Director of Operations
SunStar Laboratories, Inc. The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety.

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Project:

Project Number:

Project Manager:

Reported:

Ninyo & Moore
475 Goddard, Ste. 200 212102001
Jennifer Schmidt
Lynwood Park
02/09/23 16:29Irvine CA, 92618
25712 Commercentre Drive
Lake Forest, California 92630
949.297.5020 Phone
949.297.5027 Fax
Result Limit
Reporting
Units Level
Spike
Result
Source
%REC
%REC
Limits RPD
RPD
Limit Notes Analyte
Volatile Organic Compounds by EPA Method 8260B - Quality Control SunStar Laboratories, Inc.

Batch 23B0052 - EPA 5030 GCMS
Blank (23B0052-BLK1) Prepared: 02/02/23 Analyzed: 02/03/23 p-Isopropyltoluene ug/kgND 2.5
Methylene chloride "ND 10
Naphthalene "ND 2.5
n-Propylbenzene "ND 2.5
Styrene "ND 2.5
1,1,2,2-Tetrachloroethane "ND 2.5
1,1,1,2-Tetrachloroethane "ND 2.5
Tetrachloroethene "ND 2.5
1,2,3-Trichlorobenzene "ND 2.5
1,2,4-Trichlorobenzene "ND 2.5
1,1,2-Trichloroethane "ND 2.5
1,1,1-Trichloroethane "ND 2.5
Trichloroethene "ND 2.5
Trichlorofluoromethane "ND 2.5
1,2,3-Trichloropropane "ND 2.5
1,3,5-Trimethylbenzene "ND 2.5
1,2,4-Trimethylbenzene "ND 2.5
Vinyl chloride "ND 2.5
Benzene "ND 2.5
Toluene "ND 2.5
Ethylbenzene "ND 2.5
m,p-Xylene "ND 5.0
o-Xylene "ND 2.5
Acetone "ND 5.0
Methyl ethyl ketone "ND 5.0
Methyl isobutyl ketone "ND 5.0
2-Hexanone (MBK) "ND 5.0
" 50.0 75.4-139Surrogate: 4-Bromofluorobenzene 12261.1
" 50.0 73.1-125Surrogate: Dibromofluoromethane 10452.1
" 50.0 82.6-117Surrogate: Toluene-d8 98.449.2
Joann Marroquin, Director of Operations
SunStar Laboratories, Inc. The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety.

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Project:

Project Number:

Project Manager:

Reported:

Ninyo & Moore
475 Goddard, Ste. 200 212102001
Jennifer Schmidt
Lynwood Park
02/09/23 16:29Irvine CA, 92618
25712 Commercentre Drive
Lake Forest, California 92630
949.297.5020 Phone
949.297.5027 Fax
Result Limit
Reporting
Units Level
Spike
Result
Source
%REC
%REC
Limits RPD
RPD
Limit Notes Analyte
Volatile Organic Compounds by EPA Method 8260B - Quality Control SunStar Laboratories, Inc.

Batch 23B0052 - EPA 5030 GCMS
LCS (23B0052-BS1) Prepared: 02/02/23 Analyzed: 02/03/23 Chlorobenzene ug/kg49.6 2.5 50.0 65.2-12499.3
1,1-Dichloroethene "40.5 2.5 50.0 60.9-13180.9
Trichloroethene "41.2 2.5 50.0 62.1-12682.3
Benzene "43.7 2.5 50.0 65.3-12787.5
Toluene "41.0 2.5 50.0 64.3-12281.9
" 50.0 75.4-139Surrogate: 4-Bromofluorobenzene 12763.4
" 50.0 73.1-125Surrogate: Dibromofluoromethane 99.249.6 " 50.0 82.6-117Surrogate: Toluene-d8 97.948.9
Matrix Spike (23B0052-MS1) Prepared: 02/02/23 Analyzed: 02/03/23 Source: T230291-01 Chlorobenzene ug/kg44.4 2.5 50.0 ND 65.2-12588.8
1,1-Dichloroethene "41.2 2.5 50.0 ND 60.9-13182.4
Trichloroethene "40.0 2.5 50.0 ND 62.1-12680.0
Benzene "41.0 2.5 50.0 ND 65.3-12782.0
Toluene "38.4 2.5 50.0 ND 64.3-12576.8
" 50.0 75.4-139Surrogate: 4-Bromofluorobenzene 12964.6
" 50.0 73.1-125Surrogate: Dibromofluoromethane 10251.1
" 50.0 82.6-117Surrogate: Toluene-d8 99.149.6
Matrix Spike Dup (23B0052-MSD1) Prepared: 02/02/23 Analyzed: 02/03/23 Source: T230291-01 Chlorobenzene ug/kg37.4 2.5 50.0 ND 2065.2-12574.9 17.0 1,1-Dichloroethene "36.2 2.5 50.0 ND 2060.9-13172.3 13.0 Trichloroethene "35.0 2.5 50.0 ND 2062.1-12670.1 13.2
Benzene "36.3 2.5 50.0 ND 2065.3-12772.6 12.2
Toluene "34.2 2.5 50.0 ND 2064.3-12568.5 11.5
" 50.0 75.4-139Surrogate: 4-Bromofluorobenzene 12462.2
" 50.0 73.1-125Surrogate: Dibromofluoromethane 10050.2
" 50.0 82.6-117Surrogate: Toluene-d8 99.950.0
Joann Marroquin, Director of Operations
SunStar Laboratories, Inc. The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety.

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Project:

Project Number:

Project Manager:

Reported:

Ninyo & Moore
475 Goddard, Ste. 200 212102001
Jennifer Schmidt
Lynwood Park
02/09/23 16:29Irvine CA, 92618
25712 Commercentre Drive
Lake Forest, California 92630
949.297.5020 Phone
949.297.5027 Fax
Notes and Definitions
QM-07 The spike recovery and or RPD was outside acceptance limits for the MS and/or MSD. The batch was accepted based on acceptable LCS recovery.

Sample results reported on a dry weight basis
Relative Percent DifferenceRPD
dry
Not ReportedNR
Analyte NOT DETECTED at or above the reporting limitND
Analyte DETECTEDDET
Joann Marroquin, Director of Operations
SunStar Laboratories, Inc. The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety.

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T230311

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T230311

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WORK ORDER
T230311
Ninyo & Moore
Lynwood Ave. 212102001Project: Project Number:

Client:

Printed: 2/3/2023 3:02:24PM
Project Manager: Joann Marroquin
Report To :

Ninyo & Moore
Jennifer Schmidt
475 Goddard, Ste. 200
Irvine, CA 92618
Received By:

Logged In By:

Date Due:

Date Received:

Date Logged In:
02/10/23 17:00 (5 day TAT)
02/03/23 12:26
02/03/23 14:55
Paul Berner
Rebecca Traficanto
Samples Received at: 3.1°C
Analysis Due TAT E xpires Comments
COC/Labels Agree
Custody Seals
Containers Intact
Preservation Confirm
Yes
Yes
Yes
Yes
Received On Ice Yes
T230311-01 212102001_Drum 7+2 [Soil] Sampled 01/30/23 12:30 (GMT-08:00) Pacific Time (US &
[NO ANALYSES]
T230311-02 212102001_Drum 4 [Soil] Sampled 01/30/23 12:30 (GMT-08:00) Pacific Time (US &
[NO ANALYSES]
T230311-03 212102001_Drum 9 [Soil] Sampled 01/30/23 10:00 (GMT-08:00) Pacific Time (US &
[NO ANALYSES]
T230311-04 212102001_Drum 3,8,10,11,12 [Soil] Sampled 01/30/23 13:00 (GMT-08:00) Pacific Time (US &
[NO ANALYSES]
T230311-05 212102001_Drum 1 [Soil] Sampled 01/30/23 10:20 (GMT-08:00) Pacific Time (US &
[NO ANALYSES]
T230311-06 212102001_Drum 6+5 [Soil] Sampled 01/30/23 14:04 (GMT-08:00) Pacific Time (US &
[NO ANALYSES]

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WORK ORDER
T230311
Ninyo & Moore
Lynwood Ave. 212102001Project: Project Number:

Client:

Printed: 2/3/2023 3:02:24PM
Project Manager: Joann Marroquin
Analysis Due TAT E xpires Comments
Composite 6:1 Samples 1,2,3,4,5,6T230311-07 212102001_Composite [Soil] Sampled 01/30/23 14:04 (GMT-08:00) Pacific Time (US &
07/29/23 14:0402/10/23 15:00 5 Composite 6:1 Samples 1,2,3,4,5,66010 Title 22 02/13/23 14:0402/08/23 15:00 3 Composite 6:1 Samples 1,2,3,4,5,68015 Carbon Chain 02/13/23 14:0402/08/23 15:00 3 Composite 6:1 Samples 1,2,3,4,5,68260 Analysis groups included in this work order
6010 Title 22
subgroup 6010B T22 7470/71 Hg

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/0/1/2/3/4/1/2/5/6/2
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Ninyo & Moore | Lynwood City Park Stormwater Capture Project, Lynwood, California | 212102001 | March 17, 2023

APPENDIX F

Liquefaction Analy sis
505
LiquefyPro CivilTech Software USA www.civiltech.com CivilTech Corporation

LIQUEFACTION ANALYSIS
Lynwood City Park Stormwater Capture Project
212102001 Plate A-1
Hole No.=CPT-1 Water Depth=8 ft Magnitude=7.3
Acceleration=0.878g
(ft)0
10 20
30 40
50 60
70 Shear Stress Ratio
CRR CSR fs1
Shaded Zone has Liquefaction Potential
0 1
Factor of Safety
0 51
Settlement
Saturated
Unsaturat.

S = 4.44 in.
0 (in.) 10
fs1=1.00
506
*******************************************************************************************************

LIQUEFACTION ANALYSIS SUMMARY
Copyright by CivilTech Software
www.civiltech.com
******************************************************************************************************* Font: Courier New, Regular, Size 8 is recommended for this report.

Licensed to , 3/2/2023 2:40:55 PM
Input File Name: G:\File Share\RVC temp\Projects\212102001 Lynwood City Park Stormwater Capture\Geo Calcs\Liq\212102001 Lynwood City Park CPT-1.liq
Title: Lynwood City Park Stormwater Capture Project
Subtitle: 212102001
Surface Elev.=
Hole No.=CPT-1
Depth of Hole= 60.00 ft
Water Table during Earthquake= 8.00 ft
Water Table during In-Situ Testing= 42.40 ft
Max. Acceleration= 0.88 g
Earthquake Magnitude= 7.30
Input Data:

Surface Elev.=
Hole No.=CPT-1
Depth of Hole=60.00 ft
Water Table during Earthquake= 8.00 ft
Water Table during In-Situ Testing= 42.40 ft
Max. Acceleration=0.88 g
Earthquake Magnitude=7.30
No-Liquefiable Soils: CL, OL are Non-Liq. Soil

1. CPT Calculation Method: Modify Robertson*

2. Settlement Analysis Method: Ishihara / Yoshimine

3. Fines Correction for Liquefaction: Stark/Olson et al.*

4. Fine Correction for Settlement: During Liquefaction*

5. Settlement Calculation in: All zones*

9. User request factor of safety (apply to CSR) , User= 1 Plot one CSR curve (fs1=User)
507

10. Use Curve Smoothing: Yes*
* Recommended Options
In-Situ Test Data:

Depth qc fs Rf gamma Fines D50
ft atm atm pcf % mm
__________________________________________________

0.00 0.00 0.04 100.00 120.00 * 0.50

0.93 19.25 0.46 2.40 120.00 * 0.50

1.87 28.72 0.54 1.87 120.00 * 0.50

2.77 28.72 0.42 1.48 120.00 * 0.50

3.68 34.58 0.47 1.35 120.00 * 0.50

4.59 21.49 0.37 1.71 120.00 * 0.50

5.53 11.14 0.36 3.20 120.00 * 0.50

6.47 26.47 0.47 1.76 120.00 * 0.50

7.38 32.14 0.79 2.45 120.00 * 0.50

8.31 29.31 0.69 2.37 120.00 * 0.50

9.20 33.51 0.82 2.45 120.00 * 0.50

10.11 53.63 0.82 1.52 120.00 * 0.50

11.03 19.34 1.14 5.92 120.00 * 0.50

11.96 26.47 1.04 3.92 120.00 * 0.50

12.86 35.46 0.56 1.57 120.00 * 0.50

13.80 14.85 0.73 4.90 120.00 * 0.50

14.70 32.34 1.05 3.25 120.00 * 0.50

15.63 21.10 1.00 4.75 120.00 * 0.50

16.55 14.17 0.80 5.62 120.00 * 0.50

17.47 17.10 0.71 4.16 120.00 * 0.50

18.38 17.39 0.94 5.42 120.00 * 0.50

19.29 27.74 1.45 5.21 120.00 * 0.50

20.21 35.56 1.08 3.05 120.00 * 0.50

21.14 36.54 1.20 3.29 120.00 * 0.50

22.05 43.08 0.63 1.46 120.00 * 0.50

22.99 10.45 0.43 4.09 120.00 * 0.50

23.89 14.17 0.63 4.45 120.00 * 0.50

24.80 11.14 0.53 4.79 120.00 * 0.50

25.73 20.91 1.17 5.61 120.00 * 0.50

26.66 37.51 1.33 3.55 120.00 * 0.50

27.59 54.41 1.26 2.32 120.00 * 0.50
508

28.49 41.62 0.77 1.84 120.00 * 0.50

29.42 71.22 1.46 2.05 120.00 * 0.50

30.32 54.51 1.90 3.49 120.00 * 0.50

31.24 19.88 1.17 5.91 120.00 * 0.50

32.16 40.35 1.82 4.52 120.00 * 0.50

33.07 17.49 1.13 6.47 120.00 * 0.50

34.00 55.49 2.01 3.62 120.00 * 0.50

34.90 159.30 2.49 1.56 120.00 * 0.50

35.84 193.00 2.05 1.06 120.00 * 0.50

36.78 207.60 2.46 1.18 120.00 * 0.50

37.67 223.50 2.85 1.28 120.00 * 0.50

38.58 114.80 2.22 1.93 120.00 * 0.50

39.51 88.90 1.90 2.14 120.00 * 0.50

40.42 18.37 1.12 6.10 120.00 * 0.50

41.34 12.41 0.49 3.98 120.00 * 0.50

42.27 69.65 1.88 2.71 120.00 * 0.50

43.17 188.00 3.12 1.66 120.00 * 0.50

44.09 68.19 2.31 3.39 120.00 * 0.50

45.01 112.20 1.34 1.19 120.00 * 0.50

45.94 122.50 1.57 1.28 120.00 * 0.50

46.86 94.86 1.37 1.45 120.00 * 0.50

47.77 177.60 2.32 1.30 120.00 * 0.50

48.69 173.10 1.70 0.98 120.00 * 0.50

49.60 153.10 2.69 1.75 120.00 * 0.50

50.54 24.96 0.69 2.77 120.00 * 0.50

51.47 80.40 1.83 2.27 120.00 * 0.50

52.37 84.31 1.64 1.95 120.00 * 0.50

53.29 200.80 3.46 1.72 120.00 * 0.50

54.21 247.70 3.97 1.60 120.00 * 0.50

55.15 289.90 3.51 1.21 120.00 * 0.50

56.04 272.10 2.74 1.01 120.00 * 0.50

56.98 256.90 2.71 1.05 120.00 * 0.50

57.89 242.70 2.01 0.83 120.00 * 0.50

58.80 37.03 2.16 5.84 120.00 * 0.50

59.73 26.67 0.87 3.24 120.00 * 0.50
__________________________________________________
* Modify Robertson method generates Fines from qc/fs. Inputted Fines are not relevant. 509
Output Results:

Settlement of Saturated Sands=3.67 in.

Settlement of Unsaturated Sands=0.76 in.

Total Settlement of Saturated and Unsaturated Sands=4.44 in.

Differential Settlement=2.218 to 2.928 in.

Depth CRRm CSRfs F.S. S_sat. S_dry S_all
ft in. in. in.
_______________________________________________________

0.00 2.00 0.57 5.00 3.67 0.76 4.44

1.00 0.34 0.57 5.00 3.67 0.76 4.43

2.00 0.29 0.57 5.00 3.67 0.76 4.43

3.00 0.17 0.57 5.00 3.67 0.72 4.40

4.00 0.14 0.57 5.00 3.67 0.49 4.16

5.00 0.30 0.56 5.00 3.67 0.39 4.06

6.00 0.14 0.56 5.00 3.67 0.36 4.04

7.00 0.20 0.56 5.00 3.67 0.15 3.83

8.00 0.24 0.56 0.43* 3.67 0.00 3.67

9.00 0.67 0.59 1.13 3.59 0.00 3.59

10.00 0.18 0.62 0.29* 3.42 0.00 3.42

11.00 2.00 0.65 5.00 3.30 0.00 3.30

12.00 2.00 0.67 5.00 3.30 0.00 3.30

13.00 0.15 0.69 0.22* 3.16 0.00 3.16

14.00 2.00 0.71 5.00 3.13 0.00 3.13

15.00 0.33 0.73 0.45* 3.13 0.00 3.13

16.00 2.00 0.74 5.00 3.13 0.00 3.13

17.00 2.00 0.76 5.00 3.13 0.00 3.13

18.00 2.00 0.77 5.00 3.13 0.00 3.13

19.00 2.00 0.78 5.00 3.13 0.00 3.13

20.00 0.31 0.79 0.40* 3.09 0.00 3.09

21.00 2.00 0.80 5.00 3.09 0.00 3.09

22.00 0.16 0.81 0.19* 2.93 0.00 2.93

23.00 2.00 0.82 5.00 2.88 0.00 2.88

24.00 2.00 0.82 5.00 2.88 0.00 2.88

25.00 2.00 0.83 5.00 2.88 0.00 2.88

26.00 2.00 0.84 5.00 2.88 0.00 2.88

27.00 2.00 0.84 5.00 2.88 0.00 2.88

28.00 2.00 0.85 5.00 2.77 0.00 2.77
510

29.00 0.20 0.85 0.24* 2.71 0.00 2.71

30.00 0.29 0.86 0.34* 2.54 0.00 2.54

31.00 2.00 0.86 5.00 2.53 0.00 2.53

32.00 2.00 0.85 5.00 2.53 0.00 2.53

33.00 2.00 0.85 5.00 2.53 0.00 2.53

34.00 2.00 0.85 5.00 2.53 0.00 2.53

35.00 0.39 0.85 0.46* 2.39 0.00 2.39

36.00 0.46 0.84 0.55* 2.26 0.00 2.26

37.00 0.60 0.84 0.71* 2.18 0.00 2.18

38.00 0.27 0.84 0.33* 2.15 0.00 2.15

39.00 0.21 0.83 0.26* 1.95 0.00 1.95

40.00 2.00 0.83 5.00 1.74 0.00 1.74

41.00 2.00 0.82 5.00 1.74 0.00 1.74

42.00 2.00 0.82 5.00 1.74 0.00 1.74

43.00 0.59 0.82 0.73* 1.71 0.00 1.71

44.00 2.00 0.81 5.00 1.67 0.00 1.67

45.00 0.16 0.81 0.20* 1.48 0.00 1.48

46.00 0.19 0.80 0.23* 1.24 0.00 1.24

47.00 0.19 0.79 0.24* 0.99 0.00 0.99

48.00 0.27 0.79 0.34* 0.80 0.00 0.80

49.00 0.22 0.78 0.29* 0.59 0.00 0.59

50.00 2.00 0.78 5.00 0.48 0.00 0.48

51.00 2.00 0.77 5.00 0.48 0.00 0.48

52.00 2.00 0.77 5.00 0.42 0.00 0.42

53.00 0.28 0.76 0.37* 0.27 0.00 0.27

54.00 0.52 0.75 0.70* 0.23 0.00 0.23

55.00 0.68 0.75 0.91* 0.23 0.00 0.23

56.00 0.55 0.74 0.74* 0.23 0.00 0.23

57.00 0.49 0.73 0.67* 0.17 0.00 0.17

58.00 0.35 0.73 0.48* 0.09 0.00 0.09

59.00 2.00 0.72 5.00 0.00 0.00 0.00

60.00 2.00 0.71 5.00 0.00 0.00 0.00
_______________________________________________________ * F.S.<1, Liquefaction Potential Zone
(F.S. is limited to 5, CRR is limited to 2, CSR is limited to 2) Units: Unit: qc, fs, Stress or Pressure = atm (1.0581tsf); Unit Weight = pcf; Depth = ft; Settlement = in.
511
____________________________________________________________________________________ 1 atm (atmosphere) = 1 tsf (ton/ft2)
CRRm Cyclic resistance ratio from soils
CSRsf Cyclic stress ratio induced by a given earthquake (with user request factor of safety)
F.S. Factor of Safety against liquefaction, F.S.=CRRm/CSRsf S_sat Settlement from saturated sands
S_dry Settlement from Unsaturated Sands
S_all Total Settlement from Saturated and Unsaturated Sands NoLiq No-Liquefy Soils
512
LiquefyPro CivilTech Software USA www.civiltech.com CivilTech Corporation

LIQUEFACTION ANALYSIS
Lynwood City Park Stormwater Capture Project
212102001 Plate A-1
Hole No.=CPT-2 Water Depth=8 ft Magnitude=7.3
Acceleration=0.878g
(ft)0
10 20
30 40
50 60
70 Shear Stress Ratio
CRR CSR fs1
Shaded Zone has Liquefaction Potential
0 1
Factor of Safety
0 51
Settlement
Saturated
Unsaturat.

S = 4.30 in.
0 (in.) 10
fs1=1.00
513
*******************************************************************************************************

Licensed to , 3/2/2023 2:59:32 PM
Input File Name: G:\File Share\RVC temp\Projects\212102001 Lynwood City Park Stormwater Capture\Geo Calcs\Liq\212102001 Lynwood City Park CPT-2.liq
Title: Lynwood City Park Stormwater Capture Project
Subtitle: 212102001
Surface Elev.=
Hole No.=CPT-2
Depth of Hole= 60.00 ft
Water Table during Earthquake= 8.00 ft
Water Table during In-Situ Testing= 42.40 ft
Max. Acceleration= 0.88 g
Earthquake Magnitude= 7.30
Input Data:

Surface Elev.=
Hole No.=CPT-2
Depth of Hole=60.00 ft
Water Table during Earthquake= 8.00 ft
Water Table during In-Situ Testing= 42.40 ft
Max. Acceleration=0.88 g
Earthquake Magnitude=7.30
No-Liquefiable Soils: CL, OL are Non-Liq. Soil

1. CPT Calculation Method: Modify Robertson*

2. Settlement Analysis Method: Ishihara / Yoshimine

3. Fines Correction for Liquefaction: Stark/Olson et al.*

4. Fine Correction for Settlement: During Liquefaction*

5. Settlement Calculation in: All zones*

9. User request factor of safety (apply to CSR) , User= 1 Plot one CSR curve (fs1=User)
514

10. Use Curve Smoothing: Yes*
* Recommended Options
In-Situ Test Data:

Depth qc fs Rf gamma Fines D50
ft atm atm pcf % mm
__________________________________________________

0.00 0.10 0.11 109.00 120.00 * 0.50

1.00 17.67 0.34 1.95 120.00 * 0.50

1.99 28.12 0.51 1.82 120.00 * 0.50

2.99 24.80 0.35 1.40 120.00 * 0.50

3.94 40.23 0.42 1.04 120.00 * 0.50

4.92 71.18 0.47 0.66 120.00 * 0.50

5.91 57.32 0.72 1.25 120.00 * 0.50

6.91 17.48 0.60 3.40 120.00 * 0.50

7.89 8.59 0.70 8.10 120.00 * 0.50

8.87 14.74 0.61 4.14 120.00 * 0.50

9.86 19.33 0.63 3.26 120.00 * 0.50

10.83 11.91 0.73 6.09 120.00 * 0.50

11.82 14.26 0.63 4.45 120.00 * 0.50

12.80 35.15 0.51 1.46 120.00 * 0.50

13.78 33.69 0.93 2.75 120.00 * 0.50

14.77 9.76 0.26 2.69 120.00 * 0.50

15.75 12.01 0.66 5.49 120.00 * 0.50

16.75 29.88 0.63 2.12 120.00 * 0.50

17.72 13.28 0.80 6.05 120.00 * 0.50

18.74 11.52 0.65 5.63 120.00 * 0.50

19.72 13.47 0.63 4.65 120.00 * 0.50

20.70 15.23 1.08 7.08 120.00 * 0.50

21.66 29.20 1.34 4.58 120.00 * 0.50

22.65 42.18 1.06 2.52 120.00 * 0.50

23.62 15.82 0.97 6.14 120.00 * 0.50

24.60 10.55 0.77 7.26 120.00 * 0.50

25.60 7.32 0.48 6.61 120.00 * 0.50

26.60 6.83 0.51 7.44 120.00 * 0.50

27.59 33.88 1.54 4.54 120.00 * 0.50

28.54 150.30 2.50 1.66 120.00 * 0.50

29.53 92.76 2.26 2.44 120.00 * 0.50
515

30.51 47.26 1.65 3.48 120.00 * 0.50

31.53 62.69 1.22 1.94 120.00 * 0.50

32.51 43.94 1.95 4.44 120.00 * 0.50

33.48 13.67 0.88 6.46 120.00 * 0.50

34.45 18.26 1.15 6.29 120.00 * 0.50

35.43 21.58 0.65 3.01 120.00 * 0.50

36.42 47.55 1.54 3.23 120.00 * 0.50

37.43 144.40 1.49 1.03 120.00 * 0.50

38.40 171.90 2.40 1.40 120.00 * 0.50

39.39 218.60 2.61 1.20 120.00 * 0.50

40.37 164.80 1.95 1.18 120.00 * 0.50

41.37 104.00 1.52 1.46 120.00 * 0.50

42.33 23.24 0.81 3.47 120.00 * 0.50

43.31 87.10 1.80 2.07 120.00 * 0.50

44.29 148.20 3.09 2.09 120.00 * 0.50

45.27 158.50 2.28 1.44 120.00 * 0.50

46.26 163.50 2.39 1.46 120.00 * 0.50

47.24 111.50 1.47 1.32 120.00 * 0.50

48.24 15.62 0.54 3.48 120.00 * 0.50

49.25 114.90 1.24 1.08 120.00 * 0.50

50.20 114.60 1.93 1.69 120.00 * 0.50

51.21 88.17 2.10 2.38 120.00 * 0.50

52.16 164.70 2.47 1.50 120.00 * 0.50

53.17 202.60 3.06 1.51 120.00 * 0.50

54.15 33.69 2.59 7.68 120.00 * 0.50

55.11 174.50 2.62 1.50 120.00 * 0.50

56.10 250.90 1.46 0.58 120.00 * 0.50

57.08 367.30 3.67 1.00 120.00 * 0.50

58.07 370.40 4.36 1.18 120.00 * 0.50

59.07 412.10 2.58 0.63 120.00 * 0.50
__________________________________________________
* Modify Robertson method generates Fines from qc/fs. Inputted Fines are not relevant.

Output Results:

Settlement of Saturated Sands=3.76 in.

Settlement of Unsaturated Sands=0.54 in.

Total Settlement of Saturated and Unsaturated Sands=4.30 in.

Differential Settlement=2.152 to 2.840 in.
516
Depth CRRm CSRfs F.S. S_sat. S_dry S_all
ft in. in. in.
_______________________________________________________

0.00 2.00 0.57 5.00 3.76 0.54 4.30

1.00 0.25 0.57 5.00 3.76 0.54 4.30

2.00 0.27 0.57 5.00 3.76 0.53 4.30

3.00 0.16 0.57 5.00 3.76 0.49 4.26

4.00 0.21 0.57 5.00 3.76 0.25 4.01

5.00 0.36 0.56 5.00 3.76 0.21 3.97

6.00 0.20 0.56 5.00 3.76 0.17 3.93

7.00 2.00 0.56 5.00 3.76 0.00 3.76

8.00 2.00 0.56 5.00 3.76 0.00 3.76

9.00 2.00 0.59 5.00 3.76 0.00 3.76

10.00 0.45 0.62 0.72* 3.76 0.00 3.76

11.00 2.00 0.65 5.00 3.76 0.00 3.76

12.00 2.00 0.67 5.00 3.76 0.00 3.76

13.00 0.15 0.69 0.21* 3.66 0.00 3.66

14.00 2.00 0.71 5.00 3.51 0.00 3.51

15.00 2.00 0.73 5.00 3.51 0.00 3.51

16.00 2.00 0.74 5.00 3.51 0.00 3.51

17.00 0.16 0.76 0.21* 3.45 0.00 3.45

18.00 2.00 0.77 5.00 3.38 0.00 3.38

19.00 2.00 0.78 5.00 3.38 0.00 3.38

20.00 2.00 0.79 5.00 3.38 0.00 3.38

21.00 2.00 0.80 5.00 3.38 0.00 3.38

22.00 2.00 0.81 5.00 3.38 0.00 3.38

23.00 0.18 0.82 0.22* 3.30 0.00 3.30

24.00 2.00 0.82 5.00 3.28 0.00 3.28

25.00 2.00 0.83 5.00 3.28 0.00 3.28

26.00 2.00 0.84 5.00 3.28 0.00 3.28

27.00 2.00 0.84 5.00 3.28 0.00 3.28

28.00 0.17 0.85 0.20* 3.23 0.00 3.23

29.00 0.40 0.85 0.47* 3.10 0.00 3.10

30.00 0.13 0.86 0.15* 2.94 0.00 2.94

31.00 2.00 0.86 5.00 2.85 0.00 2.85

32.00 2.00 0.85 5.00 2.73 0.00 2.73

33.00 2.00 0.85 5.00 2.73 0.00 2.73
517

34.00 2.00 0.85 5.00 2.73 0.00 2.73

35.00 2.00 0.85 5.00 2.65 0.00 2.65

36.00 2.00 0.84 5.00 2.65 0.00 2.65

37.00 0.20 0.84 0.24* 2.55 0.00 2.55

38.00 0.27 0.84 0.33* 2.33 0.00 2.33

39.00 0.37 0.83 0.45* 2.16 0.00 2.16

40.00 0.33 0.83 0.40* 2.04 0.00 2.04

41.00 2.00 0.82 5.00 1.92 0.00 1.92

42.00 2.00 0.82 5.00 1.82 0.00 1.82

43.00 2.00 0.82 5.00 1.82 0.00 1.82

44.00 2.00 0.81 5.00 1.69 0.00 1.69

45.00 0.30 0.81 0.38* 1.60 0.00 1.60

46.00 0.24 0.80 0.30* 1.40 0.00 1.40

47.00 0.22 0.79 0.28* 1.21 0.00 1.21

48.00 2.00 0.79 5.00 1.11 0.00 1.11

49.00 0.22 0.78 0.27* 1.10 0.00 1.10

50.00 0.20 0.78 0.25* 0.86 0.00 0.86

51.00 0.20 0.77 0.26* 0.64 0.00 0.64

52.00 0.27 0.77 0.35* 0.54 0.00 0.54

53.00 0.38 0.76 0.50* 0.37 0.00 0.37

54.00 2.00 0.75 5.00 0.29 0.00 0.29

55.00 0.28 0.75 0.38* 0.20 0.00 0.20

56.00 0.42 0.74 0.57* 0.04 0.00 0.04

57.00 0.98 0.73 1.34 0.00 0.00 0.00

58.00 1.16 0.73 1.60 0.00 0.00 0.00

59.00 1.27 0.72 1.76 0.00 0.00 0.00

60.00 1.07 0.71 1.50 0.00 0.00 0.00
_______________________________________________________ * F.S.<1, Liquefaction Potential Zone
(F.S. is limited to 5, CRR is limited to 2, CSR is limited to 2) Units: Unit: qc, fs, Stress or Pressure = atm (1.0581tsf); Unit Weight = pcf; Depth = ft; Settlement = in.
____________________________________________________________________________________ 1 atm (atmosphere) = 1 tsf (ton/ft2)
CRRm Cyclic resistance ratio from soils
CSRsf Cyclic stress ratio induced by a given earthquake (with user request factor of safety)
518
F.S. Factor of Safety against liquefaction, F.S.=CRRm/CSRsf S_sat Settlement from saturated sands
S_dry Settlement from Unsaturated Sands
S_all Total Settlement from Saturated and Unsaturated Sands NoLiq No-Liquefy Soils
519

520

APPENDIX F

STORMWATER CAPTURE STUDY TECHNICAL MEMORANDUM

521

San Diego | Los Angeles
805.729.0943
craftwaterinc.com

MEMO
TO: Mir T. Fattahi, Acting City Engineer – City of Lynwood

FROM: Courtney Semlow & Yulun Wu – Craftwater Engineering, Inc.

SUBJECT: Lynwood Park Stormwater Capture Project
Stormwater Capture Study Technical Memorandum

DATE: June 9, 2023

The Lower Los Angeles River Watershed Management Program (LLAR WMP) Group has been charged with achieving reductions of pollutants in the subwatersheds of Reach 1 and Reach 2 of the Lower Los Angeles River, Compton Creek, and Rio Hondo. In accordance with the plans outlined in the LLAR WMP, a regional project has been identified at Lynwood Park in the City of Lynwood. The project is intended to intercept the dry-weather flow and a sizeable portion of the wet-weather flows from an adjacent storm drain. Stormwater will be diverted from a 72” reinforced concrete pipe (RCP; BI 0006 Unit 3 Line D) along Birch Street and an 81” reinforced concrete pipe (RCP; BI 0006 Unit 3 Line A) along Bullis Road, both managed by the Los Angeles County Flood Control District (LACFCD). Subsurface and surface best management practices (BMP) are proposed at the Lynwood Park site to capture stormwater from the diverted storm drain. Project constraints and potential options will be detailed in this memo to present an array of options that will contribute to both water quality goals and other important project considerations and desired outcomes.

522
Lynwood Park Stormwater Capture Project Stormwater Capture Study 2

1.0 OBJECTIVES
To identify the most effective stormwater capture configuration at the project site, decision support modeling has been conducted to identify the optimal BMP configuration using a balanced approach that incorporates design storm hydrologic targets as well as long-term water quality considerations. This optimal configuration addresses stormwater runoff that will be diverted to the project site from the storm drain pipes along Birch St and Bullis Rd.

BMP configuration recommendations will be made for Lynwood Park for three key design parameters: 1) diversion rates, 2) discharge rates, and 3) BMP storage size. Each parameter can take a range of feasible values based on baseline hydrology and site assessment. The long-term performance of all the feasible BMP configurations was simulated by a custom BMP model that allows robust assessment of a range of treatment options using hourly Loading Simulation Program C++ (LSPC) data in Water Years 2009-2018. The updated Watershed Management Modeling System (WMMS 2.0) developed by LACFCD and LACDPW was used to generate the LSPC data. The resulting performance statistics of these alternative configurations were then evaluated against water quality objectives and construction and O&M considerations. The optimal BMP configurations that fulfill all the requirements are recommended. Figure 1-1 is the preliminary concept schematics of the proposed BMP.

This memo explains how the recommended BMP configurations at Lynwood Park were developed. Section 2.0 introduces the existing condition of the watersheds draining to Lynwood Park. Section 3.0 explains how the BMP optimization model was set up and how BMP performance should be evaluated and compared. Section 4.0 presents the modeling results showing the water quality benefits different BMP alternatives could attain. Section

5.0 analyzes the results from Section 4.0 using the methods in Section 3.0, and recommends the BMP configurations that fulfill all the project requirements while maintaining cost-effectiveness.

523
Lynwood Park Stormwater Capture Project Stormwater Capture Study 3

Figure 1-1. Concept Schematic for the Lynwood Park BMP (may not represent final project details)

10.7 524
Lynwood Park Stormwater Capture Project Stormwater Capture Study 4

2.0 BASELINE SITE CONDITIONS
The following subsections summarize the baseline watershed, hydrologic, and on-site conditions and constraints that will be accounted for in BMP configuration and optimization analysis for the Lynwood Park site.

2.1 Watershed Characterization
For this study, the Loading Simulation Program C++ (LSPC) software was used to simulate the contaminant loading, runoff volume, and flow rate associated with a long-term, 10-year continuous time series (Water Year 2009 to Water Year 2018). LSPC was also used for 85th percentile design storm calculations. A regionally calibrated LSPC model was used as this model was used in EWMP/WMP development and is accepted by the Los Angeles Water Quality Control Board for compliance analyses. This LSPC model is a component of the updated Watershed Management Modeling System (WMMS 2.0).

The drainage area delineations for the project site (Figure 2-1) were developed using geospatial data associated with the LSPC modeling subwatersheds and verified/corrected slightly using further GIS analysis where full subwatersheds did not coincide with project locations and where subsurface storm drains overlapped. Digital stormwater pipe inventories and high-resolution Light Detection and Ranging (LiDAR) elevation data were used to accomplish subwatershed splitting. Developed drainage areas were used to model runoff and water quality baseline time series. These were then incorporated into BMP models to optimize the BMP decision variables. The overall area and impervious fraction are summarized in Table 2-1. Figure 2-2 depicts the land uses within the drainage area. The watershed’s impervious area is predominantly composed of residential areas.

Table 2-1. Summary of Watershed and Hydrologic Conditions for the Lynwood Park BMP Drainage Areas Location
Drainage
Area
(acres)
Impervious
Area
(acres, %)
85th
Percentile
Design
Storm
(inches)
Avg.

Annual
Runoff
(ac-ft)
Avg.

Annual
Zinc
Load
(lbs)
85th
Percentile
Storm
Runoff
(ac-ft)
85th
Percentile
Storm
Peak Flow
(cfs)
Birch St. 399 221 (55.42%)

0.92 165 86.7 9.2 16.6
Bullis Rd. 556 299 (53.69%) 226 107.3 12.6 24.2
Total 955 520 (54.4%) 391 194 21.8 40.8

2.2 Hydrologic Considerations
Long-term baseline flows and pollutant loads to the site are also summarized in Table 2-1. The total loadings presented in this table represent the maximum possible reductions that could be achieved by control measures at the project site. However, pragmatic diversion limitations, space constraints, and subsequent treatment mechanisms will ultimately limit how much runoff and pollutant mass can potentially be diverted into the BMP.

Peak flow rate and total runoff for the 85th percentile design storm (0.92 in., taken from isohyetal data for the centroid of the drainage areas) are found in Table 2-1. The precipitation and baseline storm drain runoff time series are plotted in Figure 2-3.

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Lynwood Park Stormwater Capture Project Stormwater Capture Study 5

Figure 2-1. Lynwood Park Project Drainage Area
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Lynwood Park Stormwater Capture Project Stormwater Capture Study 6

Figure 2-2. Lynwood Park Project Drainage Area Land Use 527
Lynwood Park Stormwater Capture Project Stormwater Capture Study 7

Figure 2-3. Precipitation and Baseline Storm Drain Runoff (top: Birch St drain, bottom: Bullis Rd drain) 528
Lynwood Park Stormwater Capture Project Stormwater Capture Study 8

3.0 STORMWATER CAPTURE OPTIMIZATION METHODS

3.1 Water Quality Optimization Strategy
The primary design goal of the Lynwood Park Project is to reduce long-term annual loading of pollutants in the LLAR Watershed using zinc as the limiting pollutant of interest in the analysis as established by the LLAR WMP. According to the latest WMP Reasonable Assurance Analysis, the City
needs to install a total BMP volume of 95.4 acre-ft by 2028 to meet the final compliance milestone. To ensure that the system will be sized to maximize load reductions in a cost- effective manner, optimization modeling was performed.

The purpose of optimization modeling is to balance design components (including BMP volume, inflow diversion rates, and outflow treatment rates) such that no one component limits the performance of the system subject to potential discharge options (see Figure 3-1 at right). Optimization supports decision making throughout the design process by guiding selection of the most cost-effective system design.

The model setup for water quality simulation and optimization is complex, involving several modeling systems and iterative feedback from design engineers. The general methodology is discussed below, and the results are presented thereafter.

3.2 BMP Performance Modeling and Optimization
The first step of the modeling was to predict BMP performance for a range of 1) potential diversion rates, 2) discharge alternatives, and 3) BMP sizes. Different combinations of these parameters will lead to different BMP performance statistics, including runoff capture and pollutant capture. These BMP model inputs and outputs are discussed in this section.

A custom BMP model was used to improve upon certain modeling limitations in EPA’s System for Urban Stormwater Treatment and Analysis Integration (SUSTAIN). This custom model is grounded in the physical BMP representations used in SUSTAIN, and it provides built-in optimization algorithms to more systematically automate the process of evaluating many different BMP configurations to select an effective solution related to project goals. The model was run using 10 years of runoff and pollutant loading time-series data generated by LSPC at an hourly time step for water years 2009-2018. For each potential BMP configuration, the hourly inflow, storage, and outflow of stormwater and pollutants were simulated. The simulated performance statistics of all the BMP configurations are then evaluated against the objectives and considerations in Section 3.3 to develop the optimal project configuration alternatives.

3.2.1 Model Input - Diversion Rates
Model runs were limited to feasible diversion ranges for the proposed diversion point based on prior project knowledge related to the drainage area and potential project storage size. Diversion rates from the Birch St diversion point and the Bullis Rd diversion point were both modeled over the range of 15 to 35 cfs, varying in 5 Figure 3-1. Conceptual illustration of
optimization modeling balancing various design
components to maximize performance.
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Lynwood Park Stormwater Capture Project Stormwater Capture Study 9

cfs increments. Gravity diversion is feasible at the site and is generally more cost effective than pump diversion especially at higher diversion rates.

3.2.2 Model Input - Discharge Alternatives
Infiltration
Falling head percolation tests performed by Ninyo & Moore in March 2023 produced adjusted percolations rates of 0.61, 0.01, 0.32, and 0.34 inches/hour using a safety factor of 4 (boring P-1, P-2, P-3 and P-4, respectively).

The 0.61 in/hr test was performed at a 3-5’ depth while the other three tests were performed at a 15-20' depth.

Because the proposed subsurface BMP footprint only covers P-3 and P-4, 0.32 inches/hour was selected as the design infiltration rate that is used in modeling.

Filtration
Several commonly available stormwater filtration devices (at 2.88 cfs, 5.76 cfs, and 7.84 cfs discharge rates) were modeled. These values were chosen to cover a range of potential outflows common to off-the-shelf proprietary filter products. If the desired outflow rate changes, rates can be revaluated in later stages of design. Water treated through filtration would be returned downstream of the diversion point through gravity flow.

Filtration and Infiltration
A combination of filtered outlet and infiltration outlet provides both water quality and water supply benefits. To allow for gravity flow, the filter outlet needs to be set at a level below the maximum water level within the BMP storage. Water will only flow through the filter when the water level is above the filter outlet. Filter outlet heights of 0.1, 0.5, 1, 3, 6, and 9 ft are modeled to explore its effect on BMP performance. The vertical configuration of the BMP is illustrated in Figure 3-2.

Figure 3-2. Filtration and Infiltration BMP Profile Illustration The ephemeral stream and pond shown in Figure 1-1 are landscape features that are not modeled as surface BMPs because of their much smaller scales compared to the subsurface BMP. They are also designed to not interfere with the performance of the subsurface BMP. This memo only models the filtration and infiltration processes within the subsurface BMP.

3.2.3 Model Input - Storage Volume
Commonly available storage depths of 5’ and 10’ are modeled. Other storage depths may be used during later stages of design. Modeling was carried out for a BMP footprint ranging from 0.1 to 2.0 acres (maximum feasible footprint due to site constraints) at 0.01-acre increments.

Storm Drain
Storm Drain
Filter
Pump
Subsurface Storage
Filter Outlet
Infiltration
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Lynwood Park Stormwater Capture Project Stormwater Capture Study 10

3.2.4 Model Output – 85th Percentile 24-hour Design Storm Performance Statistics A separate spreadsheet model was developed to verify whether a combination of diversion rate, treatment rate and storage volume can fully capture the peak flow and total runoff volume resulted from an 85th percentile 24- hour design storm.

3.2.5 Model Output – Long-term BMP performance statistics Hourly inflow and outflow of runoff and pollutant loads can be generated by the custom model for each BMP configuration. This output time series data can be summarized into the following performance statistics that are relevant to the project objectives for BMP optimization:
 Average Annual Runoff Reduction: The average amount of stormwater removed from the storm drain system due to infiltration per year.
 Average Annual Divertible Pollutant (Zinc) Load: The average mass of pollutants (Total Zinc) the diversion structure can theoretically divert to the BMP per year if the BMP has infinite storage volume.  Average Annual Pollutant (Zinc) Load Reduction: The average mass of pollutants (Total Zinc) the BMP can remove through treatment per year.
 Cost-effectiveness: Measured by the planning-level construction cost to capture one pound of Zinc per year, namely the marginal cost of Zinc reduction. This value is only used to compare the cost-effectiveness of alternatives in terms of water quality benefits.

3.3 BMP Optimization Objectives and Considerations
This section discusses how the BMP performance statistics described in Section 3.2.5 are used for BMP optimization. Multiple aspects and stages of the project are considered when optimizing the BMP, including 1) how the BMP contributes to water supply, water quality and flood control, 2) how this project integrates with the Safe Clean Water Program, and 3) whether the BMP is optimized for construction and O&M.

3.3.1 General Project Objectives
From a watershed management perspective, BMP projects should be evaluated against these objectives:
 Water Quality: The amount of stormwater pollutants the BMP can remove, and the volume of stormwater the BMP can treat. This will be the primary objective of the Lynwood Park project.  Water Supply: The volume of stormwater that can be used for water supply. As discussed in Section 3.2.2, water supply is not used as a BMP optimization objective.  Flood Control: The peak flow rate the BMP can capture and the runoff volume the BMP can store during a storm event to reduce flooding. The BMPs should be sized to capture the peak flow rate and runoff volume of at least the 85th percentile 24-hour design storm if feasible.

3.3.2 Safe Clean Water Program (SCWP) Metrics
Benefits predicted for different BMP configuration options must also be weighed against Safe Clean Water Program (SCWP) scoring criteria to determine the optimal choice for a given site to ensure a Project meets the needs of this important regional program. The following SCWP scoring categories are primarily dependent on the proposed treatment type:
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Lynwood Park Stormwater Capture Project Stormwater Capture Study 11

 Wet Weather vs. Dry Weather BMP: Does the proposed BMP capture the 85th percentile storm of the targeted drainage area? If so, it is historically defined as a wet weather project per the SCWP Scoring Committee. Otherwise, it is a dry weather BMP. Wet Weather and Dry Weather BMPs have different water quality scoring criteria, as detailed below. Both BMP types can still fulfill all other project related SCW scoring criteria (Water Supply, Community Investment, etc.)  Water Quality:
o Wet Weather BMP: Removal of 50%/80% of divertible pollutants. o Dry Weather BMP: Removal of 100% of all tributary dry weather flows  Water Supply: Utilizing captured stormwater to replenish local water supply (water reclamation and groundwater recharge).
o Scoring thresholds for SCW occur at 25, 100, 200, and 300 ac-ft of water supply benefit.  Nature Based Solutions: Implement or mimic natural processes to treat stormwater (infiltration).

3.3.3 Construction and O&M Considerations
Making the BMP size larger increases water quality benefits but also increases construction cost and maintenance efforts. A larger diversion rate requires a pre-treatment unit with a larger capacity which also increases construction and maintenance costs. Therefore, when the key objectives described in Section 3.3.1 and 3.3.2 can be fulfilled, the lowest diversion rate, the smallest BMP storage size and the smallest filtration rate are recommended to ensure the project is cost-effective. The cost-effectiveness of all BMP alternatives is reviewed in the next section.

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Lynwood Park Stormwater Capture Project Stormwater Capture Study 12

4.0 OPTIMIZATION MODELING RESULTS
The performance statistics of different BMP configurations are presented. The results in this section are then evaluated against the BMP optimization objectives and considerations in the next section to develop the optimal BMP configuration.

4.1 85th Percentile Design Storm Capture
The minimum diversion rate and the minimum storage volumes required to fully capture the 85th percentile storm is summarized in Table 4-1. The filter outlet is set at the bottom of the storage structure.

Table 4-1. BMP Diversion Rate and Volume Required to Capture the 85th Percentile Storm 85th Percentile 24-hr Storm BMP Design Alternative Birch St Diversion
Bullis Rd
Diversion Combined
Minimum Diversion Rate (cfs) All alternatives 16.6 24.2 40.8 Minimum Storage Volume
(ac-ft)

0.32 in/hr infil., 5’ storage depth 8.3 11.3 19.6

2.88 cfs filter & infil., 10’ depth 4.2 7.2 15.8

5.76 cfs filter & infil., 10’ depth 1.9 3.7 11.3

7.84 cfs filter & infil., 10’ depth 1.2 2.6 8.5

4.2 Storm Drain Diversion BMP Optimization

4.2.1 Water Quality Performance Comparison
Figure 4-1 compares the water quality performance of the BMPs with or without a filter, and the performance of different filter sizes and storage depths. The filter options in the figure have the filter outlet set at the bottom of the storage as explained in Section 3.2.2.

For smaller BMP sizes, adding a filter greatly improves the zinc reduction performance because the filter treats stormwater at a faster rate than infiltration. As BMP size becomes larger, there is a diminishing return in Zinc reduction because 1) the BMP is larger enough to treat most of the pollutants, so the additional volume brings little benefits, and 2) storage volume is no longer the design component that is limiting zinc load reduction.

A 5 ft deep BMP has twice the footprint of a 10 ft deep BMP with the same volume, and therefore has twice the infiltration flow rates (infiltration flow rate = infiltration rate (inches/hour) × footprint (ft2)). When infiltration is the only treatment mechanism, a 5 ft deep BMP removes more zinc load than 10 ft deep BMP with the same volume. However, for BMPs with both filtration and infiltration treatment, the increase in infiltrate flow rate due to a larger footprint does not have a significant impact on zinc load reduction because filtration rather than infiltration captures most of the zinc load.

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Lynwood Park Stormwater Capture Project Stormwater Capture Study 13

Figure 4-1. Lynwood Park Both Diversion - Zinc Reduction of All Alternatives

Figure 4-2 compares the water quality performance of different filter sizes and diversion rates. These diversion rates are the total diversion capacity at the Birch St and Bullis Rd diversion points.

When other conditions are the same, a larger filter significantly improves the zinc reduction of smaller BMPs.

The smaller BMPs treat stormwater primarily through filtration because they have smaller footprints and therefore lower infiltration flow rates. Larger BMPs can treat more water through infiltration but can still benefit from larger filters.

No diversion rate performs the best in all cases. When storage size is close to zero, zinc reduction is hardly affected by diversion rate because storage size is the limiting design factor. As storage size increases, lower diversion rates become more favorable because they can better utilize the storage. Higher diversion rates would fill the storage too early during a storm and bypass most of the flow that could have been partially treated if there is still space in the storage. When storage size further increases, higher diversion rates become more favorable because diversion rate is now the limiting factor. A higher diversion rate simply allows more pollutant into the storage which is big enough to treat the additional runoff being diverted.

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Lynwood Park Stormwater Capture Project Stormwater Capture Study 14

Figure 4-2. Lynwood Park Both Diversion - Zinc Reduction of Filtration & Infiltration Options

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Lynwood Park Stormwater Capture Project Stormwater Capture Study 15

4.2.2 Cost Effectiveness Comparison
The planning-level marginal cost of Zinc load reduction is compared in Figure 4-3. The 5’-deep storage options are generally less cost effective because they occupy a larger footprint to achieve the same storage volume, which increases the cost of excavation and backfill.

Alternatives with bigger filters are generally more cost effective because the increase in Zinc reduction outweighs the increase in cost (lower marginal cost = cost, slight increase / zinc reduction, bigger increase). For the same reason, higher diversion rates are more cost effective for large storage sizes. However, high diversion rates are not cost effective in 5’-deep BMPs and the smaller 10’-deep BMPs.

It should be noted that, although marginal cost (in $/(lb Zn/yr)) does not increase monotonically with storage size, diversion rate and filter size, a BMP with a larger storage size, higher diversion rate and higher filtration rate always has a higher construction cost (in $).

Figure 4-3. Lynwood Park Both Diversion – Marginal Cost of Filtration & Infiltration Options 536
Lynwood Park Stormwater Capture Project Stormwater Capture Study 16

4.2.3 Water Quality and Water Supply Performance Comparison Infiltration treatment can potentially recharge groundwater and provide water supply benefits, whereas filtration treatment returns the treated water to the storm drain. The proportion of infiltrated and filtered stormwater can be adjusted by setting the filter outlet within the subsurface storage, as explained in Section

3.2.2. Stored water under the filter outlet level is only available for infiltration, while the water above the outlet can be both infiltrated and filtered.

Figure 4-4 illustrates the trade-off between 1) the water quality benefits measured by average annual zinc load reduction and 2) the water supply benefits measured by average annual groundwater recharge volume. All plotted alternatives have a 7.84 cfs filter, a 10’-deep storage, and a total diversion rate of 45 cfs. Each rainbow- colored line represents the BMP alternatives with the same filter height (0.1 ft, 0.5 ft, …, 9 ft). The grey dotted lines are contours of BMPs with the same storage volume. The blue, red, and green lines are SCW program benchmarks.

There is a trade-off between water quality and water supply benefits. Other configurations unchanged, a higher filter outlet generally leads to more water supply benefit and less water quality benefits, because it reserves more water for infiltration (except for some of the largest BMPs in the plot). More infiltration means more water supply since filtration does not provide water supply, and less pollutant removal because infiltration is slower at removing pollutants. No optimal filter height can maximize both objectives. Therefore, a point has to be picked to balance the water quality and water supply benefits of the BMP. The next section will recommend a BMP configuration using the modeling results presented in Section 4.

Figure 4-4. Compare Water Quality and Water Supply Objectives using Various Filter Heights

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Lynwood Park Stormwater Capture Project Stormwater Capture Study 17

5.0 PROJECT ALTERNATIVES AND RECOMMENDATIONS

5.1 Lynwood Park BMP Recommendation
The recommended BMP for Lynwood Park has the following design parameters:
 Filter height: the filter outlet should be set at the bottom of the subsurface storage to prioritize water quality benefits (modeled as 0.1 ft above the bottom). This design maximizes pollutant reduction while also providing more than 25 ac-ft/yr of water supply.
 Storage depth: 10 ft storage depth is recommended because it is more cost effective than 5 ft storage depth, as explained in Section 4.2.2.
 Filter size: a 7.84 cfs filter is recommended. The large filter treats more pollutant and is more cost- effective, and it greatly reduces the storage volume required to fully capture the 85th percentile storm (Table 4-1). Water is pumped from the bottom of the subsurface storage to the filter and then discharged into the Bullis Rd storm drain.
 Diversion rate: divert 20 cfs from the Birch St storm drain and 25 cfs from the Bullis Rd storm drain.

These two values are larger than the 85th percentile peak flows (Table 4-1). Knowing the BMP will have a

7.84 cfs filter and a 10’ storage depth, the storage size must be above 8.5 ac-ft to capture the 85th percentile storm (Table 4-1). At this size, although larger diversion rates are more cost-effective in terms of zinc reduction (Figure 4-3), those BMPs also cost more to build. The recommended diversion rates can fulfill all the project requirements with the lowest construction cost.  Storage volume: a 10.7 acre-ft storage volume with a footprint of 1.07 acres is recommended. This size is selected to treat 80% of the removable zinc load while capturing the 85th percentile storm.

In conclusion, the recommended BMP has a 20 cfs gravity diversion from the Birch St storm drain, a 25 cfs gravity diversion from the Bullis Rd storm drain, a 10.7 acre-feet 10’-deep subsurface storage volume that allows infiltration at the bottom, and a 7.84 cfs filter that takes water from the bottom of the subsurface storage.

5.2 Summary of Expected Performance Statistics
The recommended BMP configurations and their expected long-term performance statistics are summarized in Table 5-1.

Table 5-1. Summary of Recommended Configurations and Performance Statistics Configuration
Diversion Rate 20 cfs gravity diversion from the Birch St storm drain 25 cfs gravity diversion from the Bullis Rd storm drain BMP Type Subsurface Storage with Infiltration
Depth 10 ft
Volume 10.7 ac-ft
Discharge 0.32 in/hr infiltration + 7.84 cfs pumped filtration Performance
Zinc Load Reduction (lb/yr) 127
% Divertible Zinc Load Reduction 80.6%
Water Supply (ac-ft/yr) 38
Capture 85th Percentile Storm Yes
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Lynwood Park Stormwater Capture Project Stormwater Capture Study 18

6.0 CONCLUSIONS
This Stormwater Capture Memo was prepared for the Lynwood Park Stormwater Capture Project to demonstrate progress towards compliance for City of Lynwood. The existing hydrology and water quality conditions were first characterized, then an optimization analysis informed data-driven selection of effective solutions. The optimization analysis aimed to identify the BMP which provides cost-effective protection to the watershed while contributing to regional goals. This analysis determined that a subsurface infiltration BMP that diverts 20 cfs from the Birch St storm drain and 25 cfs gravity diversion from the Bullis Rd storm drain through gravity, has

10.0 ft of storage depth, 10.7 ac-ft storage volume and 7.84 cfs pumped filtration discharge is the optimum BMP configuration. The proposed BMP can fully capture the 85th percentile 24-hour storm, remove at least 80% of the divertible Zinc load, and provide more than 25 ac-ft/year of groundwater recharge. 539

APPENDIX G

NOISE CALCULATIONS
540
Roadway Construction Noise Model (RCNM),Version 1.1
Report date:8/28/2024
Case Description:Lynwood Park Stormwater Capture Project Construction (Average) ---- Receptor #1 ----
Baselines (dBA)
DescriptionLand Use Daytime Evening Night
St Francis Medical CenterResidential 60 60 60
Equipment
Spec Actual Receptor Estimated
Impact Lmax Lmax Distance Shielding
Description Device Usage(%) (dBA) (dBA) (feet) (dBA)
Crane No 16 80.6 364 0
Crane No 16 80.6 364 0
Excavator No 40 80.7 364 0
Excavator No 40 80.7 364 0
Front End Loader No 40 79.1 364 0
Front End Loader No 40 79.1 364 0
Front End Loader No 40 79.1 364 0
Impact Pile Driver Yes 20 101.3 364 0
Results
Calculated (dBA) Noise Limits (dBA) Noise Limit Exceedance (dBA) Day Evening Night Day Evening Night
Equipment *Lmax Leq Lmax Leq Lmax Leq Lmax Leq Lmax Leq Lmax Leq Lmax Leq Crane 63.3 55.3 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Crane 63.3 55.3 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Excavator 63.5 59.5 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Excavator 63.5 59.5 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Front End Loader 61.9 57.9 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Front End Loader 61.9 57.9 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Front End Loader 61.9 57.9 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Impact Pile Driver 84 77 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Total 84 77.4 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A *Calculated Lmax is the Loudest value.
---- Receptor #2 ----
Baselines (dBA)
DescriptionLand Use Daytime Evening Night
Holser Middle SchoolResidential 60 60 60
Equipment
Spec Actual Receptor Estimated
Impact Lmax Lmax Distance Shielding
Description Device Usage(%) (dBA) (dBA) (feet) (dBA)
Crane No 16 80.6 250 0
Crane No 16 80.6 250 0
Excavator No 40 80.7 250 0
Excavator No 40 80.7 250 0
Front End Loader No 40 79.1 250 0
Front End Loader No 40 79.1 250 0
Front End Loader No 40 79.1 250 0
Impact Pile Driver Yes 20 101.3 250 0
Results
Calculated (dBA) Noise Limits (dBA) Noise Limit Exceedance (dBA) Day Evening Night Day Evening Night
Equipment *Lmax Leq Lmax Leq Lmax Leq Lmax Leq Lmax Leq Lmax Leq Lmax Leq Crane 66.6 58.6 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Crane 66.6 58.6 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Excavator 66.7 62.8 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Excavator 66.7 62.8 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Front End Loader 65.1 61.2 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Front End Loader 65.1 61.2 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Front End Loader 65.1 61.2 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Impact Pile Driver 87.3 80.3 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Total 87.3 80.7 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A *Calculated Lmax is the Loudest value.
---- Receptor #3 ----
Baselines (dBA)
DescriptionLand Use Daytime Evening Night
Lynwood LibraryResidential 60 60 60
Equipment
Spec Actual Receptor Estimated
Impact Lmax Lmax Distance Shielding
Description Device Usage(%) (dBA) (dBA) (feet) (dBA)
Crane No 16 80.6 790 0
Crane No 16 80.6 790 0
Excavator No 40 80.7 790 0
Excavator No 40 80.7 790 0
Front End Loader No 40 79.1 790 0
Front End Loader No 40 79.1 790 0
Front End Loader No 40 79.1 790 0
Impact Pile Driver Yes 20 101.3 790 0
Results
Calculated (dBA) Noise Limits (dBA) Noise Limit Exceedance (dBA) Day Evening Night Day Evening Night
Equipment *Lmax Leq Lmax Leq Lmax Leq Lmax Leq Lmax Leq Lmax Leq Lmax Leq Crane 56.6 48.6 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Crane 56.6 48.6 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Excavator 56.7 52.8 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Excavator 56.7 52.8 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Front End Loader 55.1 51.2 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Front End Loader 55.1 51.2 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Front End Loader 55.1 51.2 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Impact Pile Driver 77.3 70.3 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Total 77.3 70.7 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A *Calculated Lmax is the Loudest value.
---- Receptor #4 ----
Baselines (dBA)
DescriptionLand Use Daytime Evening Night
Residential w/o Birch StResidential 60 60 60
Equipment
Spec Actual Receptor Estimated
Impact Lmax Lmax Distance Shielding
Description Device Usage(%) (dBA) (dBA) (feet) (dBA)
Crane No 16 80.6 1058 0
Crane No 16 80.6 1058 0
Excavator No 40 80.7 1058 0
Excavator No 40 80.7 1058 0
Front End Loader No 40 79.1 1058 0
Front End Loader No 40 79.1 1058 0
Front End Loader No 40 79.1 1058 0
Impact Pile Driver Yes 20 101.3 1058 0
Results
Calculated (dBA) Noise Limits (dBA) Noise Limit Exceedance (dBA) Day Evening Night Day Evening Night
Equipment *Lmax Leq Lmax Leq Lmax Leq Lmax Leq Lmax Leq Lmax Leq Lmax Leq Crane 54 46.1 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Crane 54 46.1 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Excavator 54.2 50.2 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Excavator 54.2 50.2 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Front End Loader 52.6 48.6 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Front End Loader 52.6 48.6 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Front End Loader 52.6 48.6 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Impact Pile Driver 74.8 67.8 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Total 74.8 68.1 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A *Calculated Lmax is the Loudest value.
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Construction Vibration
Distance
Equipment PPVref (@ 25 ft, in/sec) PPV (in/sec) Lvref (@ 25 ft, VdB) Lv (VdB) PPVref (@ 25 ft, in/sec) PPV (in/sec) Lvref (@ 25 ft, VdB) Lv (VdB) PPVref (@ 25 ft, in/sec) PPV (in/sec) Lvref (@ 25 ft, VdB) Lv (VdB) PPVref (@ 25 ft, in/sec) PPV (in/sec) Lvref (@ 25 ft, VdB) Lv (VdB) Vibratory Roller 0.21 0.028 94 77 0.21 0.011 94 69 0.21 0.024 94 75 0.21 0.020 94 74 Hoe Ram 0.089 0.012 87 70 0.089 0.005 87 62 0.089 0.010 87 68 0.089 0.009 87 67 Large Bulldozer 0.089 0.012 87 70 0.089 0.005 87 62 0.089 0.010 87 68 0.089 0.009 87 67 Caisson Drilling 0.089 0.012 87 70 0.089 0.005 87 62 0.089 0.010 87 68 0.089 0.009 87 67 Loaded Trucks 0.076 0.010 86 69 0.076 0.004 86 61 0.076 0.009 86 67 0.076 0.007 86 66 Jackhammer 0.035 0.005 79 62 0.035 0.002 79 54 0.035 0.004 79 60 0.035 0.003 79 59 Small Bulldozer 0.003 0.000 58 41 0.003 0.000 58 33 0.003 0.000 58 39 0.003 0.000 58 38 Maximum Vibration Levels 0.028 0.011 0.024 0.020
Vibration Damage Threshold 0.30 0.30 0.30 0.30
Vibration Annoyance Threshold 0.04 0.04 0.04 0.04
Exceeds Vibration Damage Threshold? No No No No
Exceeds Vibration Annoyance Threshold? No No No No
Structure and Condition Older residential structures
Human Response Distinctly perceptible
Source: FTA 2018
Max (ft)
Receptors
West
Max (ft)
11895
South
Max (ft)
175
East
Max (ft)
105
North
542
Pile Driver Vibration
Distance
Equipment PPVref (@ 25 ft, in/sec)PPV (in/sec)Lvref (@ 25 ft, VdB)Lv (VdB) PPVref (@ 25 ft, in/sec)PPV (in/sec)Lvref (@ 25 ft, VdB)Lv (VdB) PPVref (@ 25 ft, in/sec)PPV (in/sec)Lvref (@ 25 ft, VdB)Lv (VdB) PPVref (@ 25 ft, in/sec)PPV (in/sec)Lvref (@ 25 ft, VdB)Lv (VdB) Pile Driver (impact) - Upper Range 1.518 0.317 112 98 1.518 0.082 112 87 1.518 0.049 112 82 1.518 0.008 112 66 Pile Driver (impact) - Typical 0.644 0.135 104 90 0.644 0.035 104 79 0.644 0.021 104 74 0.644 0.003 104 58 Pile Driver (sonic) - Upper Range 0.734 0.153 105 91 0.734 0.040 105 80 0.734 0.024 105 75 0.734 0.004 105 59 Pile Driver (sonic) - Typical 0.17 0.036 93 79 0.17 0.009 93 68 0.17 0.006 93 63 0.17 0.001 93 47 Maximum Vibration Levels 0.317 0.082 0.049 0.008
Vibration Damage Threshold 0.30 0.30 0.30 0.30
Vibration Annoyance Threshold 0.04 0.04 0.04 0.04
Exceeds Vibration Damage Threshold? Yes No No No
Exceeds Vibration Annoyance Threshold? Yes Yes Yes No
Structure and Condition Older residential
structures
Human Response Distinctly perceptible
Source: FTA 2018
82571 175 245
Max (ft) Max (ft) Max (ft) Max (ft)
Receptors
North South East West
543
Roadway Construction Noise Model (RCNM),Version 1.1
Report date:8/21/2024
Case Description:Lynwood Park Stormwater Capture Project Demolition (Average) ---- Receptor #1 ----
Baselines (dBA)
DescriptionLand Use Daytime Evening Night
St Francis Medical CenterResidential 60 60 60
Equipment
Spec Actual Receptor Estimated
Impact Lmax Lmax Distance Shielding
Description Device Usage(%) (dBA) (dBA) (feet) (dBA)
Excavator No 40 80.7 565 0
Front End Loader No 40 79.1 565 0
Front End Loader No 40 79.1 565 0
Dozer No 40 81.7 565 0
All Other Equipment > 5 HPNo 50 85 565 0
All Other Equipment > 5 HPNo 50 85 565 0
Results
Calculated (dBA) Noise Limits (dBA) Noise Limit Exceedance (dBA) Day Evening Night Day Evening Night
Equipment *Lmax Leq Lmax Leq Lmax Leq Lmax Leq Lmax Leq Lmax Leq Lmax Leq Excavator 59.6 55.7 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Front End Loader 58 54.1 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Front End Loader 58 54.1 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Dozer 60.6 56.6 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A All Other Equipment > 5 HP63.9 60.9 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A All Other Equipment > 5 HP63.9 60.9 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Total 63.9 65.8 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A *Calculated Lmax is the Loudest value.
---- Receptor #2 ----
Baselines (dBA)
DescriptionLand Use Daytime Evening Night
Holser Middle SchoolResidential 60 60 60
Equipment
Spec Actual Receptor Estimated
Impact Lmax Lmax Distance Shielding
Description Device Usage(%) (dBA) (dBA) (feet) (dBA)
Excavator No 40 80.7 210 0
Front End Loader No 40 79.1 210 0
Front End Loader No 40 79.1 210 0
Dozer No 40 81.7 210 0
All Other Equipment > 5 HPNo 50 85 210 0
All Other Equipment > 5 HPNo 50 85 210 0
Results
Calculated (dBA) Noise Limits (dBA) Noise Limit Exceedance (dBA) Day Evening Night Day Evening Night
Equipment *Lmax Leq Lmax Leq Lmax Leq Lmax Leq Lmax Leq Lmax Leq Lmax Leq Excavator 68.2 64.3 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Front End Loader 66.6 62.7 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Front End Loader 66.6 62.7 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Dozer 69.2 65.2 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A All Other Equipment > 5 HP72.5 69.5 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A All Other Equipment > 5 HP72.5 69.5 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Total 72.5 74.4 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A *Calculated Lmax is the Loudest value.
---- Receptor #3 ----
Baselines (dBA)
DescriptionLand Use Daytime Evening Night
Lynwood LibraryResidential 60 60 60
Equipment
Spec Actual Receptor Estimated
Impact Lmax Lmax Distance Shielding
Description Device Usage(%) (dBA) (dBA) (feet) (dBA)
Excavator No 40 80.7 78 0
Front End Loader No 40 79.1 78 0
Front End Loader No 40 79.1 78 0
Dozer No 40 81.7 78 0
All Other Equipment > 5 HPNo 50 85 78 0
All Other Equipment > 5 HPNo 50 85 78 0
Results
Calculated (dBA) Noise Limits (dBA) Noise Limit Exceedance (dBA) Day Evening Night Day Evening Night
Equipment *Lmax Leq Lmax Leq Lmax Leq Lmax Leq Lmax Leq Lmax Leq Lmax Leq Excavator 76.8 72.9 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Front End Loader 75.2 71.3 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Front End Loader 75.2 71.3 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Dozer 77.8 73.8 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A All Other Equipment > 5 HP81.1 78.1 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A All Other Equipment > 5 HP81.1 78.1 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Total 81.1 83 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A *Calculated Lmax is the Loudest value.
---- Receptor #4 ----
Baselines (dBA)
DescriptionLand Use Daytime Evening Night
Residential w/o Birch StResidential 60 60 60
Equipment
Spec Actual Receptor Estimated
Impact Lmax Lmax Distance Shielding
Description Device Usage(%) (dBA) (dBA) (feet) (dBA)
Excavator No 40 80.7 1394 0
Front End Loader No 40 79.1 1394 0
Front End Loader No 40 79.1 1394 0
Dozer No 40 81.7 1394 0
All Other Equipment > 5 HPNo 50 85 1394 0
All Other Equipment > 5 HPNo 50 85 1394 0
Results
Calculated (dBA) Noise Limits (dBA) Noise Limit Exceedance (dBA) Day Evening Night Day Evening Night
Equipment *Lmax Leq Lmax Leq Lmax Leq Lmax Leq Lmax Leq Lmax Leq Lmax Leq Excavator 51.8 47.8 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Front End Loader 50.2 46.2 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Front End Loader 50.2 46.2 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Dozer 52.8 48.8 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A All Other Equipment > 5 HP56.1 53.1 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A All Other Equipment > 5 HP56.1 53.1 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Total 56.1 58 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A *Calculated Lmax is the Loudest value.
544
Roadway Construction Noise Model (RCNM),Version 1.1
Report date:8/21/2024
Case Description:Lynwood Park Stormwater Capture Project Demolition (Average) ---- Receptor #1 ----
Baselines (dBA)
DescriptionLand Use Daytime Evening Night
St Francis Medical CenterResidential 60 60 60
Equipment
Spec Actual Receptor Estimated
Impact Lmax Lmax Distance Shielding
Description Device Usage(%) (dBA) (dBA) (feet) (dBA)
Excavator No 40 80.7 661 0
Front End Loader No 40 79.1 661 0
Front End Loader No 40 79.1 661 0
Dozer No 40 81.7 661 0
All Other Equipment > 5 HPNo 50 85 661 0
All Other Equipment > 5 HPNo 50 85 661 0
Results
Calculated (dBA) Noise Limits (dBA) Noise Limit Exceedance (dBA) Day Evening Night Day Evening Night
Equipment *Lmax Leq Lmax Leq Lmax Leq Lmax Leq Lmax Leq Lmax Leq Lmax Leq Excavator 58.3 54.3 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Front End Loader 56.7 52.7 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Front End Loader 56.7 52.7 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Dozer 59.2 55.3 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A All Other Equipment > 5 HP62.6 59.6 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A All Other Equipment > 5 HP62.6 59.6 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Total 62.6 64.5 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A *Calculated Lmax is the Loudest value.
---- Receptor #2 ----
Baselines (dBA)
DescriptionLand Use Daytime Evening Night
Holser Middle SchoolResidential 60 60 60
Equipment
Spec Actual Receptor Estimated
Impact Lmax Lmax Distance Shielding
Description Device Usage(%) (dBA) (dBA) (feet) (dBA)
Excavator No 40 80.7 353 0
Front End Loader No 40 79.1 353 0
Front End Loader No 40 79.1 353 0
Dozer No 40 81.7 353 0
All Other Equipment > 5 HPNo 50 85 353 0
All Other Equipment > 5 HPNo 50 85 353 0
Results
Calculated (dBA) Noise Limits (dBA) Noise Limit Exceedance (dBA) Day Evening Night Day Evening Night
Equipment *Lmax Leq Lmax Leq Lmax Leq Lmax Leq Lmax Leq Lmax Leq Lmax Leq Excavator 63.7 59.8 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Front End Loader 62.1 58.2 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Front End Loader 62.1 58.2 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Dozer 64.7 60.7 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A All Other Equipment > 5 HP68 65 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A All Other Equipment > 5 HP68 65 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Total 68 69.9 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A *Calculated Lmax is the Loudest value.
---- Receptor #3 ----
Baselines (dBA)
DescriptionLand Use Daytime Evening Night
Lynwood LibraryResidential 60 60 60
Equipment
Spec Actual Receptor Estimated
Impact Lmax Lmax Distance Shielding
Description Device Usage(%) (dBA) (dBA) (feet) (dBA)
Excavator No 40 80.7 340 0
Front End Loader No 40 79.1 340 0
Front End Loader No 40 79.1 340 0
Dozer No 40 81.7 340 0
All Other Equipment > 5 HPNo 50 85 340 0
All Other Equipment > 5 HPNo 50 85 340 0
Results
Calculated (dBA) Noise Limits (dBA) Noise Limit Exceedance (dBA) Day Evening Night Day Evening Night
Equipment *Lmax Leq Lmax Leq Lmax Leq Lmax Leq Lmax Leq Lmax Leq Lmax Leq Excavator 64.1 60.1 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Front End Loader 62.5 58.5 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Front End Loader 62.5 58.5 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Dozer 65 61 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A All Other Equipment > 5 HP68.3 65.3 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A All Other Equipment > 5 HP68.3 65.3 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Total 68.3 70.2 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A *Calculated Lmax is the Loudest value.
---- Receptor #4 ----
Baselines (dBA)
DescriptionLand Use Daytime Evening Night
Residential w/o Birch StResidential 60 60 60
Equipment
Spec Actual Receptor Estimated
Impact Lmax Lmax Distance Shielding
Description Device Usage(%) (dBA) (dBA) (feet) (dBA)
Excavator No 40 80.7 1487 0
Front End Loader No 40 79.1 1487 0
Front End Loader No 40 79.1 1487 0
Dozer No 40 81.7 1487 0
All Other Equipment > 5 HPNo 50 85 1487 0
All Other Equipment > 5 HPNo 50 85 1487 0
Results
Calculated (dBA) Noise Limits (dBA) Noise Limit Exceedance (dBA) Day Evening Night Day Evening Night
Equipment *Lmax Leq Lmax Leq Lmax Leq Lmax Leq Lmax Leq Lmax Leq Lmax Leq Excavator 51.2 47.3 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Front End Loader 49.6 45.7 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Front End Loader 49.6 45.7 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Dozer 52.2 48.2 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A All Other Equipment > 5 HP55.5 52.5 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A All Other Equipment > 5 HP55.5 52.5 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Total 55.5 57.4 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A *Calculated Lmax is the Loudest value.
545
Roadway Construction Noise Model (RCNM),Version 1.1
Report date:8/28/2024
Case Description:Lynwood Park Stormwater Capture Project Grading (Average) ---- Receptor #1 ----
Baselines (dBA)
DescriptionLand Use Daytime Evening Night
St Francis Medical CenterResidential 60 60 60
Equipment
Spec Actual Receptor Estimated
Impact Lmax Lmax Distance Shielding
Description Device Usage(%) (dBA) (dBA) (feet) (dBA)
Front End Loader No 40 79.1 364 0
Excavator No 40 80.7 364 0
Excavator No 40 80.7 364 0
Grader No 40 85 364 0
Grader No 40 85 364 0
Results
Calculated (dBA) Noise Limits (dBA) Noise Limit Exceedance (dBA) Day Evening Night Day Evening Night
Equipment *Lmax Leq Lmax Leq Lmax Leq Lmax Leq Lmax Leq Lmax Leq Lmax Leq Front End Loader 61.9 57.9 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Excavator 63.5 59.5 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Excavator 63.5 59.5 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Grader 67.8 63.8 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Grader 67.8 63.8 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Total 67.8 68.6 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A *Calculated Lmax is the Loudest value.
---- Receptor #2 ----
Baselines (dBA)
DescriptionLand Use Daytime Evening Night
Holser Middle SchoolResidential 60 60 60
Equipment
Spec Actual Receptor Estimated
Impact Lmax Lmax Distance Shielding
Description Device Usage(%) (dBA) (dBA) (feet) (dBA)
Front End Loader No 40 79.1 250 0
Excavator No 40 80.7 250 0
Excavator No 40 80.7 250 0
Grader No 40 85 250 0
Grader No 40 85 250 0
Results
Calculated (dBA) Noise Limits (dBA) Noise Limit Exceedance (dBA) Day Evening Night Day Evening Night
Equipment *Lmax Leq Lmax Leq Lmax Leq Lmax Leq Lmax Leq Lmax Leq Lmax Leq Front End Loader 65.1 61.2 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Excavator 66.7 62.8 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Excavator 66.7 62.8 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Grader 71 67 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Grader 71 67 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Total 71 71.8 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A *Calculated Lmax is the Loudest value.
---- Receptor #3 ----
Baselines (dBA)
DescriptionLand Use Daytime Evening Night
Lynwood LibraryResidential 60 60 60
Equipment
Spec Actual Receptor Estimated
Impact Lmax Lmax Distance Shielding
Description Device Usage(%) (dBA) (dBA) (feet) (dBA)
Front End Loader No 40 79.1 790 0
Excavator No 40 80.7 790 0
Excavator No 40 80.7 790 0
Grader No 40 85 790 0
Grader No 40 85 790 0
Results
Calculated (dBA) Noise Limits (dBA) Noise Limit Exceedance (dBA) Day Evening Night Day Evening Night
Equipment *Lmax Leq Lmax Leq Lmax Leq Lmax Leq Lmax Leq Lmax Leq Lmax Leq Front End Loader 55.1 51.2 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Excavator 56.7 52.8 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Excavator 56.7 52.8 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Grader 61 57 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Grader 61 57 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Total 61 61.8 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A *Calculated Lmax is the Loudest value.
---- Receptor #4 ----
Baselines (dBA)
DescriptionLand Use Daytime Evening Night
Residential w/o Birch StResidential 60 60 60
Equipment
Spec Actual Receptor Estimated
Impact Lmax Lmax Distance Shielding
Description Device Usage(%) (dBA) (dBA) (feet) (dBA)
Front End Loader No 40 79.1 1058 0
Excavator No 40 80.7 1058 0
Excavator No 40 80.7 1058 0
Grader No 40 85 1058 0
Grader No 40 85 1058 0
Results
Calculated (dBA) Noise Limits (dBA) Noise Limit Exceedance (dBA) Day Evening Night Day Evening Night
Equipment *Lmax Leq Lmax Leq Lmax Leq Lmax Leq Lmax Leq Lmax Leq Lmax Leq Front End Loader 52.6 48.6 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Excavator 54.2 50.2 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Excavator 54.2 50.2 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Grader 58.5 54.5 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Grader 58.5 54.5 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Total 58.5 59.3 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A *Calculated Lmax is the Loudest value.
546
Roadway Construction Noise Model (RCNM),Version 1.1
Report date:8/22/2024
Case Description:Lynwood Park Stormwater Capture Project Paving ---- Receptor #1 ----
Baselines (dBA)
DescriptionLand Use Daytime Evening Night
St Francis Medical CenterResidential 60 60 60
Equipment
Spec Actual Receptor Estimated
Impact Lmax Lmax Distance Shielding
Description Device Usage(%) (dBA) (dBA) (feet) (dBA)
Paver No 50 77.2 565 0
Roller No 20 80 565 0
Compactor (ground) No 20 83.2 565 0
Results
Calculated (dBA) Noise Limits (dBA) Noise Limit Exceedance (dBA) Day Evening Night Day Evening Night
Equipment *Lmax Leq Lmax Leq Lmax Leq Lmax Leq Lmax Leq Lmax Leq Lmax Leq Paver 56.2 53.1 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Roller 58.9 51.9 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Compactor (ground) 62.2 55.2 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Total 62.2 58.4 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A *Calculated Lmax is the Loudest value.
---- Receptor #2 ----
Baselines (dBA)
DescriptionLand Use Daytime Evening Night
Holser Middle SchoolResidential 60 60 60
Equipment
Spec Actual Receptor Estimated
Impact Lmax Lmax Distance Shielding
Description Device Usage(%) (dBA) (dBA) (feet) (dBA)
Paver No 50 77.2 210 0
Roller No 20 80 210 0
Compactor (ground) No 20 83.2 210 0
Results
Calculated (dBA) Noise Limits (dBA) Noise Limit Exceedance (dBA) Day Evening Night Day Evening Night
Equipment *Lmax Leq Lmax Leq Lmax Leq Lmax Leq Lmax Leq Lmax Leq Lmax Leq Paver 64.8 61.7 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Roller 67.5 60.5 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Compactor (ground) 70.8 63.8 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Total 70.8 67 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A *Calculated Lmax is the Loudest value.
---- Receptor #3 ----
Baselines (dBA)
DescriptionLand Use Daytime Evening Night
Lynwood LibraryResidential 60 60 60
Equipment
Spec Actual Receptor Estimated
Impact Lmax Lmax Distance Shielding
Description Device Usage(%) (dBA) (dBA) (feet) (dBA)
Paver No 50 77.2 78 0
Roller No 20 80 78 0
Compactor (ground) No 20 83.2 78 0
Results
Calculated (dBA) Noise Limits (dBA) Noise Limit Exceedance (dBA) Day Evening Night Day Evening Night
Equipment *Lmax Leq Lmax Leq Lmax Leq Lmax Leq Lmax Leq Lmax Leq Lmax Leq Paver 73.4 70.3 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Roller 76.1 69.1 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Compactor (ground) 79.4 72.4 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Total 79.4 75.6 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A *Calculated Lmax is the Loudest value.
---- Receptor #4 ----
Baselines (dBA)
DescriptionLand Use Daytime Evening Night
Residential w/o Birch StResidential 60 60 60
Equipment
Spec Actual Receptor Estimated
Impact Lmax Lmax Distance Shielding
Description Device Usage(%) (dBA) (dBA) (feet) (dBA)
Paver No 50 77.2 1394 0
Roller No 20 80 1394 0
Compactor (ground) No 20 83.2 1394 0
Results
Calculated (dBA) Noise Limits (dBA) Noise Limit Exceedance (dBA) Day Evening Night Day Evening Night
Equipment *Lmax Leq Lmax Leq Lmax Leq Lmax Leq Lmax Leq Lmax Leq Lmax Leq Paver 48.3 45.3 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Roller 51.1 44.1 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Compactor (ground) 54.3 47.3 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Total 54.3 50.6 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A *Calculated Lmax is the Loudest value.
547
Roadway Construction Noise Model (RCNM),Version 1.1
Report date:8/22/2024
Case Description:Lynwood Park Stormwater Capture Project Paving (Average) ---- Receptor #1 ----
Baselines (dBA)
DescriptionLand Use Daytime Evening Night
St Francis Medical CenterResidential 60 60 60
Equipment
Spec Actual Receptor Estimated
Impact Lmax Lmax Distance Shielding
Description Device Usage(%) (dBA) (dBA) (feet) (dBA)
Paver No 50 77.2 661 0
Roller No 20 80 661 0
Compactor (ground) No 20 83.2 661 0
Results
Calculated (dBA) Noise Limits (dBA) Noise Limit Exceedance (dBA) Day Evening Night Day Evening Night
Equipment *Lmax Leq Lmax Leq Lmax Leq Lmax Leq Lmax Leq Lmax Leq Lmax Leq Paver 54.8 51.8 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Roller 57.6 50.6 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Compactor (ground) 60.8 53.8 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Total 60.8 57 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A *Calculated Lmax is the Loudest value.
---- Receptor #2 ----
Baselines (dBA)
DescriptionLand Use Daytime Evening Night
Holser Middle SchoolResidential 60 60 60
Equipment
Spec Actual Receptor Estimated
Impact Lmax Lmax Distance Shielding
Description Device Usage(%) (dBA) (dBA) (feet) (dBA)
Paver No 50 77.2 353 0
Roller No 20 80 353 0
Compactor (ground) No 20 83.2 353 0
Results
Calculated (dBA) Noise Limits (dBA) Noise Limit Exceedance (dBA) Day Evening Night Day Evening Night
Equipment *Lmax Leq Lmax Leq Lmax Leq Lmax Leq Lmax Leq Lmax Leq Lmax Leq Paver 60.2 57.2 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Roller 63 56 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Compactor (ground) 66.3 59.3 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Total 66.3 62.5 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A *Calculated Lmax is the Loudest value.
---- Receptor #3 ----
Baselines (dBA)
DescriptionLand Use Daytime Evening Night
Lynwood LibraryResidential 60 60 60
Equipment
Spec Actual Receptor Estimated
Impact Lmax Lmax Distance Shielding
Description Device Usage(%) (dBA) (dBA) (feet) (dBA)
Paver No 50 77.2 340 0
Roller No 20 80 340 0
Compactor (ground) No 20 83.2 340 0
Results
Calculated (dBA) Noise Limits (dBA) Noise Limit Exceedance (dBA) Day Evening Night Day Evening Night
Equipment *Lmax Leq Lmax Leq Lmax Leq Lmax Leq Lmax Leq Lmax Leq Lmax Leq Paver 60.6 57.6 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Roller 63.3 56.4 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Compactor (ground) 66.6 59.6 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Total 66.6 62.8 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A *Calculated Lmax is the Loudest value.
---- Receptor #4 ----
Baselines (dBA)
DescriptionLand Use Daytime Evening Night
Residential w/o Birch StResidential 60 60 60
Equipment
Spec Actual Receptor Estimated
Impact Lmax Lmax Distance Shielding
Description Device Usage(%) (dBA) (dBA) (feet) (dBA)
Paver No 50 77.2 1487 0
Roller No 20 80 1487 0
Compactor (ground) No 20 83.2 1487 0
Results
Calculated (dBA) Noise Limits (dBA) Noise Limit Exceedance (dBA) Day Evening Night Day Evening Night
Equipment *Lmax Leq Lmax Leq Lmax Leq Lmax Leq Lmax Leq Lmax Leq Lmax Leq Paver 47.8 44.7 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Roller 50.5 43.5 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Compactor (ground) 53.8 46.8 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Total 53.8 50 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A *Calculated Lmax is the Loudest value.
548

58.3 54.3 63.7 59.8 64.1 60.1 51.2 47.3

56.7 52.7 62.1 58.2 62.5 58.5 49.6 45.7

59.2 55.3 64.7 60.7 65 61 52.2 48.2

62.6 59.6 68 65 68.3 65.3 55.5 52.5

62.6 59.6 68 65 68.3 65.3 55.5 52.5
Total 63 65 68 70 68 70 56 57

61.9 57.9 65.1 61.2 55.1 51.2 52.6 48.6

64.4 60.4 67.7 63.7 57.7 53.7 55.2 51.2

67.8 64.7 71 68 61 58 58.5 55.5
Total 68 67 71 71 61 61 59 58

61.9 57.9 65.1 61.2 55.1 51.2 52.6 48.6

63.5 59.5 66.7 62.8 56.7 52.8 54.2 50.2

67.8 63.8 71 67 61 57 58.5 54.5

67.8 63.8 71 67 61 57 58.5 54.5
84 77 87.3 80.3 77.3 70.3 74.8 67.8
Total 84 78 87 81 77 71 75 68

63.3 55.3 66.6 58.6 56.6 48.6 54 46.1

63.5 59.5 66.7 62.8 56.7 52.8 54.2 50.2

61.9 57.9 65.1 61.2 55.1 51.2 52.6 48.6

61.9 57.9 65.1 61.2 54.3 50.3 52.6 48.6
Total 64 66 67 70 57 60 54 57

54.8 51.8 60.2 57.2 60.6 57.6 47.8 44.7

57.6 50.6 63 56 63.3 56.4 50.5 43.5

60.8 53.8 66.3 59.3 66.6 59.6 53.8 46.8
Total 61 57 66 63 67 63 54 50
North South East West
65 70 70 57 6.3 13.8 6.4 1.5
67 71 61 58 9.1 14.4 -3.3 2.1
78 81 71 68 19.4 24.8 7.1 12.4
66 70 60 57 8.1 13.5 -4.3 1.2
57 63 63 50 -1.2 6.4 -1 -5.9
Highest 78 81 71 68
Lmax Leq Lmax LeqDemolition
353 ft661 ft
Lmax Leq Lmax Leq
North South East West 1,487 ft 340 ft
Equipment
Phase
Phase
Site Preparation
Equipment
North 364 ft
Lmax Leq
Excavator
Front End Loader
Front End Loader
Dozer
All Other Equipment > 5 HP
All Other Equipment > 5 HP
Leq Lmax Leq
South 250 ft East 790 ft West 1,058 ft
Front End Loader
Front End Loader
Dozer
All Other Equipment > 5 HP
Phase
Lmax Leq Lmax
West 1,058 ft
Grading Lmax Leq Lmax Leq Lmax Leq Lmax
North 364 ft South 250 ft East 790 ft
Phase North 364 ft South 250 ft
LeqEquipment
Front End Loader
Excavator
Excavator
Grader
Grader
Impact Pile Driver
East 790 ft West 1,058 ft
Front End Loader
Front End Loader
Leq Lmax LeqEquipment
Crane
Crane
Construction Lmax Leq Lmax Leq Lmax
Excavator
Excavator
Front End Loader
Lmax LeqEquipment
Paver
Roller
Compactor (ground)
340 ft West 1,487 ft
Paving Lmax Leq Lmax Leq Lmax Leq
Phase North 661 ft South 353 ft East
Construction
Paving
0 Phase
Leq
North South East West
Demolition
Site Preparation
Grading
549

59.6 55.7 68.2 64.3 76.8 72.9 51.8 47.8
58 54.1 66.6 62.7 75.2 71.3 50.2 46.2
58 54.1 66.6 62.7 75.2 71.3 50.2 46.2

60.6 56.6 69.2 65.2 77.8 73.8 52.8 48.8

63.9 60.9 72.5 69.5 81.1 78.1 56.1 53.1

63.9 60.9 72.5 69.5 81.1 78.1 56.1 53.1
Total 64 66 73 74 81 83 56 58

69.2 65.2 68.9 64.9 58.6 54.6 55 51

71.7 67.8 71.5 67.5 61.1 57.2 57.5 53.6

75.1 72.1 74.8 71.8 64.5 61.5 60.9 57.9
Total 75 75 75 74 65 64 61 60

69.2 65.2 68.9 64.9 58.6 54.6 55 51

70.8 66.8 70.5 66.5 60.2 56.2 56.6 52.6

75.1 71.1 74.8 70.8 64.5 60.5 60.9 56.9

91.3 84.3 91.1 84.1 80.7 73.8 77.1 70.1
Total 91 85 91 85 81 74 77 71

70.6 62.7 70.3 62.4 60 52.1 56.4 48.5

70.8 66.8 70.5 66.5 60.2 56.2 56.6 52.6

69.2 65.2 68.9 64.9 58.6 54.6 55 51

69.2 65.2 68.9 64.9 58.6 54.6 55 51
Total 71 74 71 73 60 63 57 59

56.2 53.1 64.8 61.7 73.4 70.3 48.3 45.3

58.9 51.9 67.5 60.5 76.1 69.1 51.1 44.1

62.2 55.2 70.8 63.8 79.4 72.4 54.3 47.3
Total 62 58 71 67 79 76 54 51
North South East West
66 74 83 58 7.6 18.3 19.2 2.1
75 74 64 60 16.4 18.2 0.2 4.5
85 85 74 71 26.7 28.5 10.5 14.8
74 73 63 59 15.4 17.3 -0.7 3.5
58 67 76 51 0.2 10.9 11.8 -5.3
Highest 85 85 83 71
78 ft West 1,394 ft
Demolition Lmax Leq Lmax Leq Lmax Leq
Phase North 565 ft South 210 ft East
Dozer
All Other Equipment > 5 HP
All Other Equipment > 5 HP
Phase North
Lmax LeqEquipment
Excavator
Front End Loader
Front End Loader
Equipment
Front End Loader
Front End Loader
Dozer
All Other Equipment > 5 HP
805 ft
Site Preparation Lmax Leq Lmax Leq Lmax Leq Lmax Leq
157 ft South 162 ft East 531 ft West
Lmax LeqEquipment
Front End Loader
Excavator
Excavator
531 ft West 805 ft
Grading Lmax Leq Lmax Leq Lmax Leq
Phase North 157 ft South 162 ft East
South 162 ft East 531 ft West 805 ft
Grader
Grader
Phase North 157 ft
Impact Pile Driver
Excavator
Excavator
Front End Loader
Front End Loader
Front End Loader
Leq Lmax LeqEquipment
Crane
Crane
Construction Lmax Leq Lmax Leq Lmax
Lmax LeqEquipment
Paver
Roller
Compactor (ground)
78 ft West 1,394 ft
Paving Lmax Leq Lmax Leq Lmax Leq
Phase North 565 ft South 210 ft East
Construction
Paving
0 Phase
Leq
North South East West
Demolition
Site Preparation
Grading
550
Roadway Construction Noise Model (RCNM),Version 1.1
Report date:8/21/2024
Case Description:Lynwood Park Stormwater Capture Project Site Preparation ---- Receptor #1 ----
Baselines (dBA)
DescriptionLand Use Daytime Evening Night
St Francis Medical CenterResidential 60 60 60
Equipment
Spec Actual Receptor Estimated
Impact Lmax Lmax Distance Shielding
Description Device Usage(%) (dBA) (dBA) (feet) (dBA)
Front End Loader No 40 79.1 157 0
Front End Loader No 40 79.1 157 0
Dozer No 40 81.7 157 0
All Other Equipment > 5 HPNo 50 85 157 0
Results
Calculated (dBA) Noise Limits (dBA) Noise Limit Exceedance (dBA) Day Evening Night Day Evening Night
Equipment *Lmax Leq Lmax Leq Lmax Leq Lmax Leq Lmax Leq Lmax Leq Lmax Leq Front End Loader 69.2 65.2 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Front End Loader 69.2 65.2 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Dozer 71.7 67.8 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A All Other Equipment > 5 HP75.1 72.1 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Total 75.1 74.6 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A *Calculated Lmax is the Loudest value.
---- Receptor #2 ----
Baselines (dBA)
DescriptionLand Use Daytime Evening Night
Holser Middle SchoolResidential 60 60 60
Equipment
Spec Actual Receptor Estimated
Impact Lmax Lmax Distance Shielding
Description Device Usage(%) (dBA) (dBA) (feet) (dBA)
Front End Loader No 40 79.1 162 0
Front End Loader No 40 79.1 162 0
Dozer No 40 81.7 162 0
All Other Equipment > 5 HPNo 50 85 162 0
Results
Calculated (dBA) Noise Limits (dBA) Noise Limit Exceedance (dBA) Day Evening Night Day Evening Night
Equipment *Lmax Leq Lmax Leq Lmax Leq Lmax Leq Lmax Leq Lmax Leq Lmax Leq Front End Loader 68.9 64.9 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Front End Loader 68.9 64.9 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Dozer 71.5 67.5 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A All Other Equipment > 5 HP74.8 71.8 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Total 74.8 74.3 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A *Calculated Lmax is the Loudest value.
---- Receptor #3 ----
Baselines (dBA)
DescriptionLand Use Daytime Evening Night
Lynwood LibraryResidential 60 60 60
Equipment
Spec Actual Receptor Estimated
Impact Lmax Lmax Distance Shielding
Description Device Usage(%) (dBA) (dBA) (feet) (dBA)
Front End Loader No 40 79.1 531 0
Front End Loader No 40 79.1 531 0
Dozer No 40 81.7 531 0
All Other Equipment > 5 HPNo 50 85 531 0
Results
Calculated (dBA) Noise Limits (dBA) Noise Limit Exceedance (dBA) Day Evening Night Day Evening Night
Equipment *Lmax Leq Lmax Leq Lmax Leq Lmax Leq Lmax Leq Lmax Leq Lmax Leq Front End Loader 58.6 54.6 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Front End Loader 58.6 54.6 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Dozer 61.1 57.2 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A All Other Equipment > 5 HP64.5 61.5 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Total 64.5 64 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A *Calculated Lmax is the Loudest value.
---- Receptor #4 ----
Baselines (dBA)
DescriptionLand Use Daytime Evening Night
Residential w/o Birch StResidential 60 60 60
Equipment
Spec Actual Receptor Estimated
Impact Lmax Lmax Distance Shielding
Description Device Usage(%) (dBA) (dBA) (feet) (dBA)
Front End Loader No 40 79.1 805 0
Front End Loader No 40 79.1 805 0
Dozer No 40 81.7 805 0
All Other Equipment > 5 HPNo 50 85 805 0
Results
Calculated (dBA) Noise Limits (dBA) Noise Limit Exceedance (dBA) Day Evening Night Day Evening Night
Equipment *Lmax Leq Lmax Leq Lmax Leq Lmax Leq Lmax Leq Lmax Leq Lmax Leq Front End Loader 55 51 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Front End Loader 55 51 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Dozer 57.5 53.6 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A All Other Equipment > 5 HP60.9 57.9 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Total 60.9 60.4 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A *Calculated Lmax is the Loudest value.
551
Roadway Construction Noise Model (RCNM),Version 1.1
Report date:8/21/2024
Case Description:Lynwood Park Stormwater Capture Project Site Preparation (Average) ---- Receptor #1 ----
Baselines (dBA)
DescriptionLand Use Daytime Evening Night
St Francis Medical CenterResidential 60 60 60
Equipment
Spec Actual Receptor Estimated
Impact Lmax Lmax Distance Shielding
Description Device Usage(%) (dBA) (dBA) (feet) (dBA)
Front End Loader No 40 79.1 364 0
Front End Loader No 40 79.1 364 0
Dozer No 40 81.7 364 0
All Other Equipment > 5 HPNo 50 85 364 0
Results
Calculated (dBA) Noise Limits (dBA) Noise Limit Exceedance (dBA) Day Evening Night Day Evening Night
Equipment *Lmax Leq Lmax Leq Lmax Leq Lmax Leq Lmax Leq Lmax Leq Lmax Leq Front End Loader 61.9 57.9 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Front End Loader 61.9 57.9 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Dozer 64.4 60.4 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A All Other Equipment > 5 HP67.8 64.7 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Total 67.8 67.3 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A *Calculated Lmax is the Loudest value.
---- Receptor #2 ----
Baselines (dBA)
DescriptionLand Use Daytime Evening Night
Holser Middle SchoolResidential 60 60 60
Equipment
Spec Actual Receptor Estimated
Impact Lmax Lmax Distance Shielding
Description Device Usage(%) (dBA) (dBA) (feet) (dBA)
Front End Loader No 40 79.1 250 0
Front End Loader No 40 79.1 250 0
Dozer No 40 81.7 250 0
All Other Equipment > 5 HPNo 50 85 250 0
Results
Calculated (dBA) Noise Limits (dBA) Noise Limit Exceedance (dBA) Day Evening Night Day Evening Night
Equipment *Lmax Leq Lmax Leq Lmax Leq Lmax Leq Lmax Leq Lmax Leq Lmax Leq Front End Loader 65.1 61.2 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Front End Loader 65.1 61.2 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Dozer 67.7 63.7 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A All Other Equipment > 5 HP71 68 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Total 71 70.5 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A *Calculated Lmax is the Loudest value.
---- Receptor #3 ----
Baselines (dBA)
DescriptionLand Use Daytime Evening Night
Lynwood LibraryResidential 60 60 60
Equipment
Spec Actual Receptor Estimated
Impact Lmax Lmax Distance Shielding
Description Device Usage(%) (dBA) (dBA) (feet) (dBA)
Front End Loader No 40 79.1 790 0
Front End Loader No 40 79.1 790 0
Dozer No 40 81.7 790 0
All Other Equipment > 5 HPNo 50 85 790 0
Results
Calculated (dBA) Noise Limits (dBA) Noise Limit Exceedance (dBA) Day Evening Night Day Evening Night
Equipment *Lmax Leq Lmax Leq Lmax Leq Lmax Leq Lmax Leq Lmax Leq Lmax Leq Front End Loader 55.1 51.2 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Front End Loader 55.1 51.2 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Dozer 57.7 53.7 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A All Other Equipment > 5 HP61 58 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Total 61 60.5 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A *Calculated Lmax is the Loudest value.
---- Receptor #4 ----
Baselines (dBA)
DescriptionLand Use Daytime Evening Night
Residential w/o Birch StResidential 60 60 60
Equipment
Spec Actual Receptor Estimated
Impact Lmax Lmax Distance Shielding
Description Device Usage(%) (dBA) (dBA) (feet) (dBA)
Front End Loader No 40 79.1 1058 0
Front End Loader No 40 79.1 1058 0
Dozer No 40 81.7 1058 0
All Other Equipment > 5 HPNo 50 85 1058 0
Results
Calculated (dBA) Noise Limits (dBA) Noise Limit Exceedance (dBA) Day Evening Night Day Evening Night
Equipment *Lmax Leq Lmax Leq Lmax Leq Lmax Leq Lmax Leq Lmax Leq Lmax Leq Front End Loader 52.6 48.6 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Front End Loader 52.6 48.6 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Dozer 55.2 51.2 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A All Other Equipment > 5 HP58.5 55.5 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Total 58.5 58 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A *Calculated Lmax is the Loudest value.
552
1 RESOLUTION NO. ____

ADOPTION OF THE INITIAL STUDY/MITIGATED NEGATIVE DECLARATION (IS/MND),

THE MITIGATION MONIT ORING AND REPORTING PROGRAM (MMRP), AND

APPROVAL OF THE LYNW OOD PARK STORMWATER CAPTURE P ROJECT (CIP PROJECT NO. 4011.68.112).

WHEREAS, the City of Lynwood (City) proposes to implement the Lynwood Park Stormwater Capture Project (Project), located at 11301 Bullis Road, Lynwood, California; and
WHEREAS, the Project consists of the construction of a regional stormwater capture, treatment, and infiltration facility within Lynwood Park, including associated park improvements; and
WHEREAS, the City is the Lead Agency for the Project pursuant to the California Environmental Quality Act (CEQA) (Public Resources Code Section 21000 et seq.) and the State CEQA Guidelines (California Code of Regulations, Title 14, Section 15000 et seq.); and
WHEREAS, an Initial Study/Mitigated Negative Declaration (IS/MND), dated June 2025 (SCH No. 2025060727), was prepared to evaluate the potential environmental impacts of the Project; and
WHEREAS, a Notice of Intent to Adopt a Mitigated Negative Declaration was circulated for a 30-day public review period from June 16, 2025, through July 16, 2025, in accordance with CEQA; and
WHEREAS, no comments were received during the public review period; and WHEREAS, a Mitigation Monitoring and Reporting Program (MMRP) has been prepared in accordance with CEQA Guidelines Section 15074(d) to ensure implementation of all mitigation measures identified in the IS/MND; and WHEREAS, the City Council has reviewed and approved the IS/MND, MMRP, and the entire administrative record for the Project.

WHEREAS, this Project has an approved FY26 budget of $344,840 and is funded through the Safe Clean Water Program (SCWP) Fund.

NOW, THEREFORE, THE CITY COUNCIL OF THE CITY OF LYNWOOD DOES HEREBY FIND, PROCLAIM, ORDER, AND RESOLVE AS FOLLOWS:

Section 1. The City Council of the City of Lynwood hereby finds that the above recitals are true and correct and incorporates them herein by this reference.

Section 2. The City Council hereby finds that the Initial Study/Mitigated Negative Declaration (IS/MND) has been prepared in co mpliance with CEQA and the State CEQA Guidelines.
553
2 Section 3. The City Council has independently reviewed and considered the IS/MND and finds that it reflects the independent judgment and analysis of the City as Lead Agency.

Section 4. Based on the whole record before the City, the City Council finds that there is no substantial evidence that the Project, as mitigated, will have a significant effect on the environment.

Section 5. The City Council hereby adopts the Mitigation Monitoring and Reporting Program (MMRP) for the Project to ensure that all mitigation measures are implemented.

Section 6. The City Council hereby approves the Lynwood Park Stormwater Capture Project.

Section 7. The Mayor is authorized to execute this Resolution for and on behalf of the City of Lynwood.

Section 8. The City Clerk shall attest and certify to the passage and adoption of this Resolution and enter it into the book of original resolutions, and it shall become effective immediately upon its approval.

Signatures on next page

554
3 PASSED, APPROVED and ADOPTED this 5th day of May 2026.

______________________________
Gabriela Camacho
Mayor
ATTEST:

___________________________
María Quiñónez
City Clerk

APPROVED AS TO FORM: APPROVED AS TO CONTENT:

Noel Tapia Suja Lowenthal
City Attorney City Manager

555
4 STATE OF CALIFORNIA )
)

COUNTY OF LOS ANGELES )

I, the undersigned, City Clerk of the City of Lynwood, do hereby certify that the foregoing Resolution was passed and adopted by the City Council of the City of Lynwood at a regular meeting held on the 5th day of May 2026, and passed by the following votes:

AYES:

NOES:

ABSTAIN:

ABSENT:

Maria Quinonez, City Clerk

STATE OF CALIFORNIA )
)

COUNTY OF LOS ANGELES )

I, the undersigned, City Clerk of the City of Lynwood, and the Clerk of the City Council of said City, do hereby certify that the above foregoing is a full, true, and correct copy of Resolution No. on file in my office and that said Resolution was adopted on the date and by the vote therein stated. Dated this 5th day of May 2026.

Maria Quinonez, City Clerk
556

AGENDA STAFF REPORT

DATE:

May
5, 2026
TO:

Honorable Mayor and Members of the City Council
APPROVED BY:

Suja Lowenthal, City Manager
PREPARED BY:

Nam Tran, PE, QSP/QSD, Associate Engineer
SUBJECT:

AWARD OF

TASK ORDER PROPOSAL FOR ONWARD ENGINEERING.

FOR CONSTRUCTION MANAGEMENT AND INSPECTION

SERVICES

FOR THE LONG BEACH BLVD WATERLINE ABANDONMENT PROJECT
(CIP PROJECT NO. 4011.68.065) AND METER RELOCATION LONG BEACH BLVD PROJECT (CIP PROJECT NO. 4011.68.099)
Agenda Item # 9.1.

Recommendation:

Staff recommends City Council adopt a resolution (Attachment 4) approving a task order proposal for Onward Engineering for Construction Management and Inspection Services for the Long Beach Boulevard Waterline Abandonment Project (CIP Project No. 4011.68.065) and Meter Relocation Long Beach Boulevard Project (CIP Project No. 4011.68.099) for a Not- to-Exceed Amount of $178,025.

Executive Summary:

The City previously awarded a construction contract to Stephen Doreck Equipment Rental, Inc. (Doreck) for the installation of new water pipelines along Long Beach Boulevard, abandonment of the existing 8-inch water main in the adjacent alley, and reconnection of water service lines and meters to the new system under CIP Project Nos. 4011.68.065 and 4011.68.099.

With construction anticipated to commence shortly, the Water Department requires support from a qualified construction management and inspection firm to ensure the contractor performs the work in accordance with contract specifications and City standards. Staff recommends awarding a task order proposal to Onward Engineering to provide these services. (PW)
City Council City Council Regular Meeting 557
Background:

City Council awarded a construction contract to Stephen Doreck Equipment Rental, Inc. (Doreck) for the Long Beach Boulevard Waterline Abandonment Project and Meter Relocation Project.

The scope of work includes:

Installation of new water mains along:

Josephine Street
Virginia Avenue
Agnes Avenue
Cedar Avenue
Magnolia Avenue
Burton Avenue
Carlin Avenue
Palm Avenue
Euclid Avenue
School Street (from Magnolia Avenue to Cedar Avenue)

Abandonment of the existing 8-inch water main located in the alley behind the commercial corridor along Long Beach Boulevard

Reconnection of water service lines and meters to the newly installed water system.

To ensure proper execution of construction activities, the City must retain qualified professionals to provide construction management and inspection services throughout the duration of the project.

Past Council Actions
Meeting Date
Description
May 2, 2023
City Council adopted a resolution entitled: “A RESOLUTION OF THE

CITY COUNCIL OF THE CITY OF LYNWOOD AWARDING A

CONTRACT TO SA ASSOCIATES FOR LONG BEACH METER
UPGRADE AND LINE ABANDONMENT DESIGN PROJECT NO.
4011.68.065, IN THE AMOUNT OF $250,000; AUTHORIZING THE

CITY MANAGER TO APPROVE AGREEMENT AMENDMENTS
RELATED TO THE PROJECT; AND AUTHORIZING THE MAYOR TO
EXECUTE THE AGREEMENT.”
City Council City Council Regular Meeting 558
March 18, 2025
City Council adopted a resolution entitled: “A RESOLUTION OF THE

CITY COUNCIL OF THE CITY OF LYNWOOD APPROVING PLANS

AND SPECIFICATIONS AND AUTHORIZATION TO SOLICIT FOR

BIDS FOR LONG BEACH BOULEVARD WATER METER UPGRADE
AND WATER MAIN ABANDONMENT PROJECT NOS. 4011.68.065 &
4011.68.099.”
June 17, 2025
City Council adopted a resolution entitled: “A RESOLUTION OF THE

CITY COUNCIL OF THE CITY OF LYNWOOD AWARDING A

CONSTRUCTION CONTRACT TO STEPHEN DORECK EQUIPMENT

RENTAL FOR LONG BEACH BLVD WATERLINE ABANDONMENT
PROJECT NO. 4011.68.065 AND METER RELOCATION LONG
BEACH BLVD PROJECT NO. 4011.68.099; APPROVING THE
TRANSFER OF FUNDS FROM: AMI METER INSTALLATION - FY24
(SMALL), (CIP NO. 4011.68.135) AND ADVANCED METERING
INFRASTRUCTURE PROJECT (LARGE), (CIP NO. 4011.68.093) TO:

LONG BEACH BOULEVARD WATER METER UPGRADE, CIP NO
4011.68.099 AND WATER MAIN ABANDONMENT PROJECT CIP NO.
4011.68.065; AUTHORIZING THE MAYOR TO EXECUTE THE

AGREEMENT AND AUTHORIZING THE CITY MANAGER TO

APPROVE AGREEMENT AMENDMENTS RELATED TO THE
PROJECT.”
Discussion and Analysis:

The City maintains a three-year on-call services contract with qualified engineering firms to provide construction management and inspection services. Onward Engineering (Onward) is included on the City’s pre-approved on-call consultant list and has demonstrated experience and familiarity with City standards and infrastructure projects.

The use of on-call consultants allows the City to efficiently deliver capital improvement projects by streamlining procurement processes and ensuring timely access to specialized technical expertise.

Staff requested a proposal from Onward Engineering to provide construction management and inspection services for this project. Onward submitted an initial proposal on June 17, 2025, in the amount of $99,965. Due to updates in the project construction schedule and additional required effort, a supplemental proposal was submitted on March 11, 2026, in the amount of $78,060, for a total not-to-exceed amount of $178,025.

The proposed scope includes construction oversight, inspection services, coordination with the contractor, documentation, and ensuring compliance with project specifications and regulatory requirements.

The total project budget, including construction, contingency, and support services, is outlined below.

City Council City Council Regular Meeting 559
Description
Amount
Construction Cost
$1,796,845.00
Contingency (10%)
$179,685.00
Construction Management / Inspection
(Onward)
$178,025.00
Labor Compliance
$9,000.00
Project Management (DMc Engineering)
$17,000.00
Total Estimated Construction Cost
$2,180,554.00

Current Budget:

The FY 2025–26 CIP budget for the Long Beach Boulevard Waterline Abandonment Project No. 4011.68.065 and Meter Relocation Long Beach Boulevard Project No. 4011.68.099 includes funding from the following:

Funding Source
Amount
WATER (Direct)
$ 1,090,500.00
LUA 2020-A Revenue Bonds (6035)
$ 1,090,500.00
Total Funding Available
$ 2,181,000.00

Description
Amount
Approved Project Budget
$2,181,000.00
Estimated Project Cost
$2,180,554.00
Remaining Balance After Project
Completion
$446.00

The total estimated project cost of $2,180,554 is within the approved budget. Costs associated with construction management and inspection services were anticipated and included in the project budget. No additional appropriation is required.

Based on Onward Engineering’s responsive proposal, prior experience with the City, and demonstrated ability to perform the required services, staff recommends approval of the Task Order Proposal.

Fiscal Impact:

The FY 2025–26 Adopted Budget includes $2,181,000 for the Long Beach Boulevard Waterline Abandonment Project (CIP No. 4011.68.065) and Meter Relocation Project (CIP No. 4011.68.099), funded through the Water Fund and 2020-A Revenue Bonds.

City Council City Council Regular Meeting 560

1. ENG ON CALL_ 010224_Onward Eng_Eng Serv_AGREEMENT_signed.pdf

2. Lynwood Change Order Request number 1 1.pdf

3. Onward Lynwood_Long Beach Meter Upgrade and Line Abandonment.pdf

4. 5-5-2026 LB Water CMCI (Resolution) V2
The total estimated project cost of $2,180,554, including construction management and inspection services, is fully funded within the approved budget. No additional appropriation is required.

Coordinated With:

City Manager’s Office
Department of Finance and Administration Services
ATTACHMENTS:

Description
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City of Lynwood – Public Works Department March 11, 2026 ATTN: Maria Borja
Subject: change Order r equeSt #1 – Sc Ope augmentatiOn & Schedule r ealignment Last week, our CM team had a meeting with DMc to go over project details and next steps. During the meeting, we went over the design files and realized that there is a lot of missing information on those contract documents. Proceeding with construction without identifying that missing data could cause major issues down the line for the City on this project. We also went over the schedule or work in the final specification document. Since the original proposal for the Long Beach Boulevard Water Line Abandonment Project was submitted over a year ago, project requirements and final specifications have evolved. To ensure the project is delivered without “disjointed” construction or field conflicts, Onward Engineering requests the following scope and fee adjustments:

1. Field Investigation to Locate Water Meters on Private Properties (New Task) A comprehensive field walk is required to mark each meter and reconcile missing data points in the field. The approved plans and specifications do not provide sufficient details and information to complete the relocation of water meters and services. This task will identify location of existing water meters and connection points for the new water services. This proactive step is critical to prevent severe field issues and ensure the contractor has accurate data for abandonment.
• CM Oversight: 40 Hours @ $185/hr = $7,400
• Field Inspection: 80 Hours @ $140/hr = $11,200
• Subtotal Task 1: $18,600

2. Enhanced Construction Management & Inspection
This adjustment accounts for both the extended project duration and a significant increase in the complexity of the CM workload. The original proposal assumed a 60-day schedule; however, final specs call for 120 calendar days.

Additionally, the current contract/budget for CM is only two hours per day. However,the level of CM involvement required for coordination, submittal review, and agency liaison work is substantially greater than initially anticipated based on the finalized project information.
• Additional CM Support: 164 Hours @ $185/hr = $30,340
• Additional Field Inspection: 208 Hours @ $140/hr = $29,120 • Subtotal Task 2: $59,460
Fee Proposal Summary
Item Description CM Hours Insp. Hours Total Cost

1.0 Field Assessment & Meter Marking 40 80 $18,600

2.0 Enhanced CM & Schedule Realignment 164 208 $59,460
TOTAL ADDITIONAL REQUESTED FEE 204 288 $78,060
Optional Design Services
Following the field assessment, Onward Engineering can provide additional design services as needed. Pricing for these design services can be provided via a separate fee schedule upon the City’s request. This scope would include:
• Plan Revisions: Drafting design details and drawings to incorporate missing elements located during the field assessment.
• Permitting Support: Preparing all necessary documentation for Right of Entry (ROE) permits to ensure project continuity.

Next Steps
We are prepared to begin the field assessment immediately to ensure no delays to the construction start date. Please provide written authorization or a revised Purchase Order to proceed.

Sincerely,
Muhammad Ataya
Vice President and Operations Manager
Onward Engineering
Onward Engineering
300 S. Harbor Blvd., Suite 814
Anaheim, CA 92805
(714) 533.3050 | www.oe-eng.com
Onward Engineering | Design Smarter. Build Better.
607
Onward Engineering | Design Smarter. Build Better.

Onward Engineering
300 S. Harbor Blvd., Suite 814
Anaheim, CA 92805
(714) 533.3050 | www.oe-eng.com
J une 17 th, 2025Misael Tolentino
Department of Public Work s
11330 Bullis Road
Lynwood, CA 90262
Subject: ProPoSa l for co n St ruction ManageMe nt and In SPe ction Service S- lo ng b each Meter uPg rade & li ne ab andon M ent Project Onward Engineering (OE) is pleased to offer our services for the Long Beach Meter Upgrade and Line Abandonment Project. We recognize the importance of this project to the City of Lynwood. It represents not just utility upgrades, but a broader investment in system reliability, public safety, and long-term infrastructure resilience. Our approach is built on thoughtful leadership, experienced field oversight, and tools that streamline communication and elevate performance.

This project consists of water main installation, system tie-ins, and abandonment of existing facilities across a series of arterial and local roadways. The primary limits span Long Beach Boulevard, from just north of Josephine Street to just south of Euclid Avenue; additional segments are located on Virginia Street, Agnes Street, Cedar Avenue, Magnolia Avenue, Burton Avenue, School Street, Carlin Avenue, and Palm Avenue. These improvements require not only technical oversight, but also careful planning and daily presence to maintain resident and traffic access, manage phasing, and monitor contractor activity.

Work items include the installation of approximately 2,000 linear feet of 8-inch and 12-inch ductile iron water main; installation and replacement of service laterals, meters, and meter boxes; installation of resilient wedge gate valves in multiple sizes; construction of fire service laterals, fire hydrants, blow-off assemblies, and air release valves; connection of new lines to the existing system; and the abandonment or removal of legacy mains and valves. Other key elements include SWPPP implementation, potholing, traffic control, concrete gutter reconstruction, and the removal and reinstallation of striping and pavement markings. Construction is anticipated to begin in July 2025, with approximately 60 working days allotted for construction and inspection services. We are prepared to provide immediate support to guide this work to a successful close, from pre-construction coordination through punch list and project documentation.

Our proposed Construction Manager is Ludy Smeets, PE. Ludy brings more than 42 years of experience in civil engineering and construction management. He has provided construction oversight for cities such as El Monte, Glendora, Costa Mesa, and Long Beach. Ludy excels in managing contractor coordination, documentation, utility tie-ins, and public-facing field issues, including schedule and claim risk. He is highly responsive, deeply technical, and focused on resolving issues before they escalate. Working in the field will be Jim Prizio, our proposed Construction Inspector. Jim has more than 30 years of inspection and supervisory experience, including recent assignments in Lakewood, Fontana, and Rialto. His work spans SWPPP verification, inspection of trenching and utility installation, traffic control review, and documentation of valves, hydrants, and pressure testing. Most recently, he completed a 103-working-day pipeline replacement program in Lakewood involving more than 11,000 feet of pipe replacement. Jim is trusted by city staff, respected by contractors, and brings consistency to every project he touches.

OE will utilize
© for construction reporting.
© is our proprietary construction tool,
which allows us to document work in real-time, and have those quantities, materials, labor, and equipment automatically update Quantity Sheets, Earned Value Charts, Cost Over Time Charts, Quantity Over Time Charts, and Percent Complete Over Time Charts. It also allows us to proactively monitor bid items that are nearing 75% complete and keep track of any overages. The
© application also allows us to generate Field Notifications, manage Punch-Lists, automatically generate Weekly Statement of Working Day reports, and manage Potential Change Orders, Unit Price Change Orders, and Contract Change Orders. Those reports can be made available to the City’s Project Manager as PDF reports in Box. This starts with preparing detailed reports and photo diaries in real-time for the City to review, alleviating any headaches by applying these services.

I would like to thank the City of Lynwood for the opportunity to submit our qualifications. I will be the firm representative and remain as the primary contact for the duration of the contract. If you have any questions, or would like any additional information, please feel free to contact me any time at: ( 714) 533-3050, or by email at: [email protected]. We look forward to a successful relationship with the City of Lynwood.

Thank you,
Muhammad Ataya, MPA
Vice President, Onward Engineering 608

RESUMES
Proposal for Construction Management and Inspection Services – Long Beach Meter Upgrade and Line Abandonment Project for the City of Lynwood 2 ludy SMeetS, Pe
construction manager
42 year S o f
ex perience
fields of expertise:

ROADWAY RESIDENTIAL PAVEMENT WATER WATER MAIN
QualIfIcatIons
pe #37221: Registered Civil Engineer • Bs: Civil Engineering, CSULB, 1979 • us army: Command & General Staff College, Ft. Leavonworth, KS, 1989 • ma: Military Science, Agricultural & Mechanics University, Texas, 1990 • apWa memBe r: American Public Works Association asce memBe r: American Society of Civil Engineers • nspe memBe r : National Society Professional Engineers • same memBe r: Society of American Military Engineers Ba c Kground
Ludy has over 42 years of civil engineering experience with focus on Project Management and Construction Management. He also has experience in the design of civil engineering projects such as street, sewer, water, and storm drain projects. Ludy has management level experience working in public works departments in cities throughout Southern California. His experience includes public agency budgeting, project implementation, project design, PS&E development, contract bidding, award administration, construction management and project closure reporting. He has selected, directed and managed consultants, architects and engineers as required in order to meet public works department goals and objectives. He has supervised and trained city staff junior engineers. His many responsibilities included providing project management for federally funded projects, and state funded projects. experIence
mauna l oa aVe. resId entIa l st reet Im proVe ments & W a ter m aIn In stallatIo n project, glendora
Ludy provided Construction Management services to the City of Glendora on the Mauna Loa Avenue Water Main Installation and Street Improvements Project. This project consisted of installing 6,400 LF of new 8-in. water main and 194,000 SF of street improvements that included pavement rehabilitation of grind and overlay, concrete sidewalk repairs, curb and gutter repairs, repairing 11 ADA non-compliant curb ramps, traffic signal loop replacement, signing, and striping for a total of 100 working days. The project was located along 3 streets off Glendora Avenue-Mauna Loa Avenue, Duell Street, and Linfield Street, as well as Minnesota Avenue. doWn to Wn pedestr Ia n Im proVe ment & Wa ter maIn lIn e relocatIo n project - t- 115 , torrance
Ludy provided Construction Management services to the City of Torrance on this Downtown Pedestrian Improvement Project. The Downtown Pedestrian Improvement Project seeks to provide a more attractive pedestrian environment along Cravens Avenue from Carson Street to Torrance Boulevard. The work encompassed construction of uniform, spacious, and ADA-compliant sidewalks, new decorative LED street lights, improved landscaping, roadway pavement rehabilitation, new curb and gutter, benches, bike racks, and pedestrian signage. The water mainline located under the sidewalk was relocated under the roadway to provide improved access for future repair work. The work also included replacement of the sidewalk, curb and gutter, and curb ramps; roadway repair; and replacement of traffic signs. local street Im proVe ment for fy 2 023-2024 & 2024-2025, gardena Ludy provided Construction Management services on the Local Streets Improvement, FY2023-24 and 2024-25, to the City of Gardena. The project locations comprised of approximately 64 predominantly residential streets consisting of work that included furnishing all labor, materials, tools, equipment, appurtenances and incidentals for the removal and disposal of existing asphalt pavement; placement of ARHM overlay; slurry seal; adjustment of access openings; 609

RESUMES

Proposal for Construction Management and Inspection Services – Long Beach Meter Upgrade and Line Abandonment Project for the City of Lynwood 3 reconstruction of curb and gutter, sidewalk and cross gutters and ADA curb ramps; removal and installation of trees; and traffic striping and signage and related work in accordance with the Plans and Specifications. The project had a duration life of 60 working days at a budget of approximately $2,998,420.00. marIna HIlls drIVe reHaBIlItatIon project, laguna nIguel Ludy provided Construction Management services to the City of Laguna Niguel on the Marina Hills Drive Rehabilitation Project. The project limits are on Marina Hills Drive and the work entailed grinding and 2” ARHM over 1” AC overlay. Additionally, traffic signal improvements to add video detection on Marina Hills Drive at the Niguel Road and Golden Lantern intersections. Concrete improvements including curb and gutter, ramps, and sidewalks as well as adjusting utilities and striping and signing were required. resIdentIal annual resurfacIng, Zones 3 & 4, pHase I & II, laguna nIguel Ludy provided Construction Management services for the City of Laguna Niguel on the Residential Annual Resurfacing Programs Zones 3 & 4 (which was split into 2 phases). This project included rehabilitating residential streets in Zones 3 and 4. Zone 3 the northeast part of the City, near the 5 freeway and the 73. Zone 4 is bound by Niguel Road to the south, Aliso Creek Road to the north, La Paz Road to the east and the City limits to the west. The work happened in two phases. Phase 1 included patching and spot repairs. Zone 3 included 114,140 square feet of patching and Oso Creek Trail added 4,800 square feet. As for Zone 4, it included 1,315 square feet of patching. Phase 2 included slurry of the streets 2,775,977 square feet of streets Zone 3 and 2,263,684 square feet in Zone 4. street I mproVements at V arIous locat Ions (cIp 186 & 190) , Hermosa BeacH Ludy provided Construction Management and inspection services for Street Improvements at Various Locations through out the City of Hermosa Beach. The purpose of the project was to restore the surface integrity of the streets, improve the ride quality and safety, as well as mitigate any potential hazards by means of pavement resurfacing. The project included 5, 135 feet of full depth street repairs, 3, 186 tons of grind and overlay rehabilitation, and 38 ADA Ramp upgrades, along with various sidewalk repairs. OE also provided the City with community coordination by means of establishing public accessable online web maps to inform and update the public on the project, as well a the distribution of public notifications. merced aVenue lInear parK project (cIp 003), el monte
Ludy provided Construction Management services to the City of El Monte on the Merced Avenue Linear Park Project, CIP 003, located on Merced Avenue between Garvey Avenue and T owneway Drive. This project features a new linear park constructed directly within a median island along a wide residential street. The 1.1-acre linear park improvements included traffic calming through lane reduction, tree planting, seating, picnic areas, naturalized play and fitness equipment, sidewalk, planting areas, protective fencing, solar lighting, trash receptacles, a Class IV bikeway with bike racks, enhanced stormwater retention areas, a beautiful walking path, and major improvements to the traffic striping and signage allowing for a safe thoroughfare for pedestrians, bike riders, as well as a place for kids to play and people in general to enjoy relaxing or exercising. A new and improved water line to replace the existing 6” and 8” water mainline along the east side of Merced Avenue was also included as part of this project. Additionally, OE provided public outreach support on the project, which substantially maintained informative and always current status during the project’s construction period. This project won the 2024 APWA Best Project of the Year: Creative and Innovative Category and was funded soley through the Clean California Grant Funds and Local Funds. 2022 eastVale resIdentIal slurry seal project, eastVale Ludy provided Construction Management services on this 2022 Residential Slurry Seal project in the City of Eastvale, which entailed slurry seal in 12 zones within the City (Areas A-L). The project construction involved a whopping 3.9 million SF of Type II Slurry, crack sealing, and various striping. local streets reHaBIlItatIon pHase I (concrete ImproVements) Zone 3, norWalK Ludy provided Construction Management services on the Local Streets Rehabilitation Program Phase I (Concrete Improvements) in Zone 3, which is bound by the Union Pacific Railroad to the Northwest, the I-5 Freeway to the Northeast, Imperial Highway to the South, and Firestone Boulevard to Southwest. The project involved removal and replacement of sidewalk (3,000 SF); curb and gutter (2,600 LF); new and replacement ADA curb ramps (93 ramps and 10 truncated domes); driveway approach repairs (500 SF); cross gutter replacements (29 locations with associated curb ramps); including incidental asphalt work, utility relocations and traffic control. 610

RESUMES

Proposal for Construction Management and Inspection Services – Long Beach Meter Upgrade and Line Abandonment Project for the City of Lynwood 4 jIM PrIZIo
construction Inspector
30 year S of
experience
fields of expertise:

ROADWAY BRIDGE SEWER PARK WATER

QualIfIcatIons
sWppp compliance • traffic control plans • superVisor: Offsite & Onsite wet & dry utilities.

BacKground
Over the past 30 years Jim has developed a swath of industry strengths and acquired knowledge in his role as a Superintendent for general contractors. In working for both Los Angeles and Orange Counties, and alongside the Inland Empire, Jim has gained a wealth of understanding for City approved plans and standards. Jim’s experience involved fulfilling public works construction requirements such as verifying SWPPP compliance, verifying traffic control plans, monitoring for safety compliance involving both the public and for the workers, and supervising the installation of offsite and onsite wet and dry utilities. Jim excelled in his role as supervisor, having worked within City Public Works departments where he developed knowledge and understanding of City codes, enforcements, and City safety-related issues. Jim further supervised projects with miscellaneous street work and utility tie-ins. Cities that have retained Jim for use of his skills include San Clemente, Santa Ana, Anaheim, Orange and Costa Mesa. experIence
fy 2024 pipeline replacement project, laKeWood
Jim served the City of Lakewood as the Construction Inspector on their FY2024 Pipeline Replacement Project. The project was located at nine residential streets within the City. The work entailed replacing approximately 11,000 feet of 8 inch PVC pipes in the neighborhood, along with replacing fire hydrants. The project lasted a total of 103 working days.
complete streets reconstruction & seWer capital impro Vements, fontana Jim provided Construction Inspection services for the City of Fontana on the Complete Streets Reconstruction and Sewer Capital Improvementsr Project. This complete street reconstruction project was located along Washington, from Redwood to Live Oak. The project called for improvements for new a new 260,000 square foot building. The sewer improvements saw the installation of a 2,000 foot sewer pipe including 480 ft of boring under the I- 10 freeway.

A Caltrans intercept storm drain and sound wall and 600 feet of RCP was also included with four complete catch basin structures. Underground conduits for three existing and two new power poles was additionally provided following the removal of 4 for existing poles and the replacement of sidewalk. Not far from the site at Live Oak and Washington involved curb and gutter and two driveway approaches, and slot patch, grind over lay on Live Oak. marina Hills driVe p aVement reHaBilitation project, laguna niguel Jim provided Construction Inspection services for the City of Laguna Niguel on the Marina Hills Drive Rehabilitation Project. The project limits were on Marina Hills Drive and the work entailed grinding and 2” ARHM over 1” AC overlay.

Additionally, traffic signal improvements to add video detection on Marina Hills Drive at the Niguel Road and Golden Lantern intersections. Concrete improvements including curb and gutter, ramps, and sidewalks as well as adjusting utilities and striping and signing were required.
611

RESUMES

Proposal for Construction Management and Inspection Services – Long Beach Meter Upgrade and Line Abandonment Project for the City of Lynwood 5 casmalia street impro Vements, rial to
Jim was the Project Supervisor for the City of Rialto on the Casmalia Street Improvements Project. The project was located at and around the cross streets of Casmalia and Linden. His supervisor duties revolved around installing new signal loops and new ADA compliant curb ramps, work on RCP pipe installations with complete catch basin and a sewer that tied into the street. There were also water pipe tie-ins for hydrants, fire services, and domestic and irrigation elements with back flow devices, along with gutter, three driveway approaches and City sidewalks. For Rule 20 work, new streetlights, including foundations and conduits, were installed. This resulted in the required repair of asphalt trenchs, slot patchs and grind and overlay.
capital improVements seWer relocation project, rial to
As the Project Supervisor on the Capital Improvements Sewer Relocation Project for the City of Rialto, Jim supervised the relocation of sewer pipe, which was required in order to accommodate a 60,000 square foot new building. The building was to be outfited with a new sewer lift station requiring a new drive approach along with slot patch and trench repair, grind and overlay, new streetlights, meter pedestals, and City irrigation time clocks. p anattoni deVelopment project, ontario
Jim was the Project Supervisor on the Panattoni Development Project in Ontario. The project involved the development of three buildings totaling 380,000 square feet, 2,600 LN feet of 12” CMLC pipeline with 3 fire services, 10 hydrants, domestic water taps, and 1,400 LN feet of RCP with complete catch basins and head wall reconfiguration at Day Creek Chanel. This also included 800 LN feet of bio swale, along with three commercial drive approaches, slot patches, grind and overlay.
p anattoni deVelopment project, irVine
As the Project Superintendent, Jim oversaw the construction of 3 drive approaches, the modification of 200 City LN feet of sidewalk, and street storm drain and sewer tie-ins on the Panattoni Development Project for the City of Irvine.

All onsite wet and dry utilities were established for 8 buildings. Jim oversaw all of the new construction.

Voit deVelopment project, tustin
Jim supervised the 2,000 LN Feet of 12” water service, 10 fire services, 12 fire hydrants and domestic water taps for the City of Tustin. The project entailed a 500 foot-long cul-de-sac street with 4 drivway approaches, City sidewalk, water services and streetlights. The project work involved a water pipe bore leading underneath a railroad track siding with a complete loop system which required the removal of Santa Ana water to property sewer tie-into the OC sanitation Redhill relive 24 inch pipeline that included a rechanneled manhole base.

Voit deVelopment project, Brea
As the Project Supervisor on this job, Jim supervised the construction of 4 drive approaches and 1,000 feet of new sidewalks. This also included slot patch grind and overlay, and landscape and irrigation at edge of the new sidewalk.
612

Proposal for Construction Management and Inspection Services – Long Beach Meter Upgrade and Line Abandonment Project for the City of Lynwood 6 FEES
fees
OE pays all Construction Inspectors prevailing wage rates in compliance with the requirements set forth by the Department of Industrial Relations (DIR) State prevailing wages under Labor Code § 1770 et seq. Labor Code §§ 1775 and 1777 .7 along with the Davis-Bacon and Related Acts (DBRA) under the standards of the Community Development Block Grant (CDBG) funding as administered by the U.S. Housing and Urban Development (HUD) Department. for c onstruction m anagement and Inspection s erVices
– long Beac H meter u pgrade and l ine aB andonment p roject

task # task name
conStruction
Manager
$185.00
hourly
conStruction
inSPector
$140.00
hourly
oe
total
hourS
oe
Sub-total
coSt
grand
total
coSt
1 PRE-CONSTRUCTION

1.1 Contructability Review 4 4 8 $1,300.00 $1,300.00

1.2 Preliminary Field Walk 4 4 8 $1,300.00 $1,300.00

1.3 Pre-construction Meeting 4 2 6 $1,020.00 $1,020.00

1.4 Repond to RFIs 8 8 $1,480.00 $1,480.00
Pre-Construction Sub- Total 20 10 30 $5,100.00 $5,100.00 2 CONSTRUCTION

2.1 Construction Management 120 120 $22,200.00 $22,200.00

2.2 Labor Compliance 16 16 $2,960.00 $2,960.00

2.3 Construction Inspection 480 480 $67,200.00 $67,200.00 Construction Sub- Total 136 480 616 $92,360.00 $92,360.00 3 POST-CONSTRUCTION

3.1 Punchlist 2 2 4 $650.00 $650.00

3.2 Final Walkthrough 2 2 4 $650.00 $650.00

3.3 Final Payment Recommendation 4 4 $740.00 $740.00

3.4 Prepare and Deliver Project Files 1 2 3 $465.00 $465.00 Post-Construction Total 9 6 15 $2,505.00 $2,505.00
grand totalS 165 496 661 $99,965.00 $99,965.00
613
RESOLUTION NO.__________

A RESOLUTION OF THE CITY COUNCIL OF THE CITY OF LYNWOOD AWARDING A TASK ORDER PROPOSAL TO ONWARD ENGINEERING. FOR CONSTRUCTION

MANAGEMENT AND INSPECTION SERVICES FOR THE LONG BEACH BLVD WATERLINE ABANDONMENT PROJECT (CIP PROJECT NO. 4011.68.065 ) AND METER RELOCATION LONG BEACH BLVD PROJECT (CIP PROJECT NO. 4011.68.099) FOR A NOT-TO-EXCEED AMOUNT OF $178,025.

WHEREAS, project was previously awarded on June 17, 2025, to Stephen Doreck Equipment Rental, Inc which was the lowest responsible bidder for $1,796,845; and WHEREAS, the scope of work for the project includes installation of new water mains on Josephine St, Virginia Ave, Agnes Ave, Cedar Ave, Magnolia Ave, Burton Ave, Carlin Ave, Palm Ave, Euclid Ave, and School St from M agnolia Ave to Cedar Ave, abandonment of the existing 8 -inch water main in the alley behind the commercial area on Long Beach Blvd, and re -connection of water service lines and water meters to the new water mains; and
WHEREAS, the Water Department needs a ssistance from a construction management and inspection firm to provide inspection services to ensure the contractor adheres to the contract and meets the City’s requirements; and WHEREAS, Staff requested a construction management and inspection services proposal from Onward Engineering. (Onward) as they are on the City’s pre-approved list of on-call consultants; and
WHEREAS, Onward submitted a proposal on June 17, 2025, with a fee of $99,965 and a second proposal on March 11, 2026, for additional work with a fee of $78,060 for a total amount of $178,025.

WHEREAS, Staff recommend the award of a Task Order to Onward for $178,025. This recommendation is based on their responsive proposal, past performance, and Onward’s ability to effectively handle the workload; and

NOW, THEREFORE, THE CITY COUNCIL OF THE CITY OF LYNWOOD DOES HEREBY FIND, PROCLAIM, ORDER, AND RESOLVE AS FOLLOWS:

Section 1. The City Council of the City of Lynwood hereby finds that the above recitals are true and correct and incorporates them herein by this reference.

Section 2. Authorize the Mayor to execute the task order proposal between the City of Lynwood and Onward Engineering in a form approved by the City Attorney in the amount of $178,025.

Section 3. Authorize the Mayor to execute the Resolution for and on behalf of the City of Lynwood.

Section 4. The City Clerk shall certify to the adoption of this Resolution and enter it into the book of original resolutions, and it shall become effective immediately upon its approval.

614
2 PASSED, APPROVED, and ADOPTED this 5th day of May 2026.

______________________________
Gabriela Camacho
Mayor
ATTEST:

___________________________
María Quiñónez
City Clerk

APPROVED AS TO FORM: APPROVED AS TO CONTENT:

Noel Tapia Suja Lowenthal
City Attorney City Manager

615
3 STATE OF CALIFORNIA )
)

COUNTY OF LOS ANGELES )

AYES:

NOES:

ABSTAIN:

ABSENT:

________________________
Maria Quiñónez, City Clerk

STATE OF CALIFORNIA )
)

COUNTY OF LOS ANGELES )

I, the undersigned, City Clerk of the City of Lynwood, and the Clerk of the City Council of said City, do her eby certify that the above foregoing is a full, true and correct copy of Resolution No. ____________ on file in my office and that said Resolution was adopted on the date and by the vote therein stated. Dated this date the 5th day of May 2026

_______________________________
Maria Quiñónez, City Clerk

616

AGENDA STAFF REPORT

DATE:

May
5, 2026
TO:

Honorable Mayor and Members of the City Council
APPROVED BY:

Suja Lowenthal, City Manager
PREPARED BY:

Cynthia Stafford, Interim Director of Human Resources & Risk Management
SUBJECT:

STAFF RECOMMENDS APPROVAL OF A RESOLUTION OF THE CITY
OF LYNWOOD CITY COUNCIL ENTITLED: "A RESOLUTION OF THE
CITY COUNCIL OF THE CITY OF LYNWOOD TO ABOLISH ONE (1)

SENIOR MANAGEMENT ANALYST POSITION, PURSUANT TO
LYNWOOD MUNICIPAL CODE 18-15.1, DUE TO A DEMONSTRATED

LACK OF SUFFICIENT WORKLOAD AND TO IMPROVE ORGANIZATION EFFICIENCY AND FISCAL RESPONSIBILITIES."
Agenda Item # 9.2.

Recommendation:

Staff recommends City Council adopt a resolution (
Attachment 1
) abolishing one Senior
Management Analyst position pursuant to Lynwood Municipal Code Section 18-15.1, amending the City’s classification and compensation plan accordingly.

Executive Summary:

As part of the City’s ongoing efforts to ensure fiscal responsibility and operational efficiency, staff conducted a review of workload distribution within the Management Analyst series. Based on this analysis, staff determined that one Senior Management Analyst position is currently underutilized, with insufficient ongoing assignments to justify maintaining the position at its current level.

Pursuant to the City’s authority under the Lynwood Municipal Code Section 18-15.1 to abolish positions when they are no longer necessary or in the interest of economy, staff recommends the deletion of this position. The proposed action would not affect service delivery, as existing City Council City Council Regular Meeting 617
staff have the capacity to absorb remaining duties.

Approval of this recommendation would result in approximately $141,485 in annual savings and supports the City’s commitment to aligning staffing levels with operational needs while maintaining high-quality services to the community. (HR) Background:

The City of Lynwood currently maintains several positions within the Management Analyst series across multiple departments. As part of ongoing operational reviews and the City’s commitment to fiscal stewardship, staff conducted an evaluation of analyst workloads, assignments, and service delivery needs.

Consistent with the City’s authority under Section 18-15.1 of the Lynwood Municipal Code, the City Council may abolish positions when they are no longer necessary or when doing so serves the interest of economy.

The analysis reviewed assigned projects and deliverables, departmental workload distribution, redundancies in duties across divisions, and alignment of positions with current organizational priorities.

Discussion and Analysis:

The Management Analyst series consists of the following classifications, which are budgeted as indicated:
1 - Assistant Administrative Analyst (Community Development) 2 - Management Analyst (Public Works and Community Development) 4 - Senior Management Analyst (2 - Public Works, 1- City Manager's Office and 1 Community Development)
The review determined that one Senior Management Analyst position is currently underutilized, with a limited volume of ongoing assignments that do not justify a full-time allocation at the senior level.

Key findings of the review are as follows:

Core analytical and administrative functions are already being effectively absorbed by existing staff.

Certain projects previously assigned to this classification have been completed or deprioritized.

Remaining duties can be redistributed without negatively impacting service. Delivery of the City Council City Council Regular Meeting 618
Resolutionâ€”Abolishment of One Position
level of work does not consistently require senior-level expertise.

Maintaining the position under current conditions would not represent an efficient use of City resources.

Organizational Impact
There would be no reduction in service levels as a result of this action. Work would be reassigned among existing staff, and departments have confirmed their ability to absorb the workload. This action aligns staffing with actual operational demand, enhances efficiency by eliminating redundancy, and supports a lean and responsive organizational structure.

Pursuant to Lynwood Municipal Code Section 18-15.1, the City Council has the authority to abolish a position when it is no longer necessary for operational needs or when doing so is in the interest of economy. As the position is currently filled, the City would comply with all applicable Personnel Rules and Regulations, Memorandum of Understanding (MOU) requirements, and meet-and-confer obligations.

Fiscal Impact:

Deletion of one Senior Management Analyst position would generate approximately $141,485 in annual savings. These savings would support reallocation of resources to higher-priority operational needs and contribute to long-term structural budget alignment.

Coordinated With:

City Manager's Office
Finance Department
City Attorney's Office
ATTACHMENTS:

Description
City Council City Council Regular Meeting 619
RESOLUTION NO. 2026-XX

RESOLUTION OF THE CITY COUNCIL OF THE CITY OF LYNWOOD TO ABOLISH ONE (1) SENIOR MANAGEMENT ANALYST POSITION, PURSUANT TO LYNWOOD MUNICIPAL CODE 18 -15.1, DUE TO A DEMONSTRATED LACK OF

SUFFICIENT WORKLOAD AND TO IMPROVE ORGANIZATION EFFICIENCY AND FISCAL RESPONSIBILITIES.

WHEREAS, the City of Lynwood is committed to maintaining efficient, effective, and fiscally responsible municipal operations; and
WHEREAS, the City has conducted a review of staffing levels and workload distribution within the Management Analyst classification series; and WHEREAS, the analysis determined that one (1) Senior Management Analyst position is currently underutilized and that the workload does not justify maintaining the position at its current level; and
WHEREAS, the City Council is authorized pursuant to §18-15 of the Lynwood Municipal Code to abolish positions when they are no longer necessary or when doing so is in the interest of economy; and
WHEREAS, the deletion of this position will not adversely impact service delivery, as duties can be reassigned among existing staff; and
WHEREAS, the deletion of the position is expected to generate annual General Fund savings and support the City’s long-term fiscal sustainability; and WHEREAS, if applicable, the City will comply with all required personnel rules, civil service provisions, and meet and confer obligations.

NOW, THEREFORE, THE CITY COUNCIL OF THE CITY OF LYNWOOD DOES HEREBY RESOLVE AS FOLLOWS:

SECTION 1. The City Council of the City of Lynwood hereby finds and declares that the foregoing recitals are true and correct, and incorporates them herein as findings and as a substantive part of this Resolution.

SECTION 2. The City Council hereby approves the abolishment of one (1) Senior Management Analyst position from the City’s authorized staffing (position control) list. 620
SECTION 3. The City Manager, or designee, is authorized to take all actions necessary to implement this Resolution, including effecting any related administrative actions and initiating lay-off proceedings.

SECTION 4. The City shall comply with all applicable laws, personnel rules, and Memoranda of Understanding, including any required notice and meet and confer obligations.

SECTION 5. The Mayor is authorized to execute this Resolution for and on behalf of the City of Lynwood.

SECTION 6. This Resolution shall take effect immediately upon its adoption.

PASSED, APPROVED and ADOPTED this 5TH day of May 2026

Gabriela Camacho
MAYOR
ATTEST:

Maria Quinonez

CITY CLERK

APPROVED AS TO FORM: APPROVED AS TO CONTENT:

Noel Tapia Cynthia Stafford
CITY ATTORNEY INTERIM DIR. OF HUMAN

RESOURCES

621

Lynwood City CouncilMay 5, 2026

Lynwood City Council
May 5, 2026