COST FILE
Prepared for:
City of Santa Clarita Prepared by:
Larry Walker Associates, Inc
in Association with Tetra Tech
March 26, 2026
Stormwater Monitoring Program
and NPDES Permit Compliance
(ES-25-26-20)
*Response File provided in separate submittal
Introduction0 App
Larry Walker Associates | Stormwater MonitoringProgram and NPDES PermitCompliance | 1 Cost Proposal
The following provides the Larry Walker Associates’ Team (LWA Team) cost proposal in response to the Request for Proposals (RFP) for Stormwater Monitoring Program and NPDES Permit Compliance. To support the Upper Santa Clara River Group’s review of the cost proposal we have developed a series of summary and detailed tables. Table 1 presents a summary of the three-year cost proposal by task to perform the work in its entirety. Table 2, Table 3, and Table 4 present a summary of Project Years 1, 2, and 3, respectively, with the cost proposal broken out by total labor hours, labor costs, other direct costs (ODCs), and analytical costs. Table 5 presents a cost breakdown by firm. Table 6 presents the staffing hours and rates. Lastly, attached to this cost proposal, are year by year breakdowns of the cost by individual deliverable, including notes and assumptions.
The LWA Team acknowledges that the proposal is valid for a 120-day period and the proposed work will be performed at the “not-to-exceed” price designated by task for each team member. As Vice President of LWA, I am authorized to bind this cost proposal.
__________________ _______________ Signature Date
03/25/2026
Introduction0 App
Larry Walker Associates | Stormwater MonitoringProgram and NPDES PermitCompliance | 2 Cost Proposal
Table 1. Cost Breakdown by Task: Three Year Summary
Task
No. Task Description Year 1 Year 2 Year 3 Total(1)
1.0 Program Management $94,881 $94,881 $94,881 $284,643
2.0 Dry Weather Monitoring $44,871 $44,871 $44,871 $134,613
3.0 Dry Weather Monitoring - Monthly
Bacteria TMDL Monitoring $50,459 $50,459 $50,459 $151,378
4.0 Wet Weather Monitoring $66,872 $66,872 $192,481 $326,225
5.0 Source ID Additional Monitoring $13,160 $13,160 $13,160 $39,480
6.0 Reporting $226,418 $226,418 $226,418 $679,254
7.0 QAPP, Health and Safety Plan $6,660 $6,660 $6,660 $19,979
8.0 Laboratory Analysis $8,695 $8,695 $8,695 $26,085
9.0 Toxicity (Potential) $16,441 $16,441 $16,441 $49,323 Subtotal $528,457 $528,457 $654,066 $1,710,980
10.0 Potential Special Studies (Optional) To Be Determined Total Requested Services $528,457 $528,457 $654,066 $1,710,980 Potential Additional Services
New MS4 Permit Requirements
CIMP Update (Draft and Final) - - $44,160 $44,160
Additional Cost Considerations
10% Contingency(2) $52,846 $52,846 $65,407 $171,098
Total Potential Additional Services $52,846 $52,846 $109,567 $215,258 Total All Services $581,303 $581,303 $763,632 $1,926,237
1. Inclusive of subcontractor markup of 10%.
2. Contingencies could include but may not be limited to: additional toxicity testing (upstream sites or Toxicity Identification Evaluations [TIEs]), additional analysis to meet future screening requirements (e.g., similar to Table E-6, toxicity sensitive species), additional DNA/RNA analysis, and/or special studies.
Introduction0 App
Larry Walker Associates | Stormwater MonitoringProgram and NPDES PermitCompliance | 3 Cost Proposal
Table 2. Cost Breakdown by Task: Year 1
Task
No. Task Description
Total
Labor
Hours
Total
Labor
Costs
Other
Direct
Costs
Analytical
Costs Total(1)
1.0 Program Management 362 $94,881 $0 $0 $94,881
2.0 Dry Weather Monitoring 156 $31,121 $2,750 $11,000 $44,871
3.0 Dry Weather Monitoring -
Monthly Bacteria TMDL
Monitoring
214 $41,300 $6,189 $2,970 $50,459
4.0 Wet Weather Monitoring 175 $33,872 $5,500 $27,500 $66,872
5.0 Source ID Additional
Monitoring 59 $13,160 $0 $0 $13,160
6.0 Reporting 910 $226,418 $0 $0 $226,418
7.0 QAPP, Health and Safety Plan 27 $6,660 $0 $0 $6,660
8.0 Laboratory Analysis 5 $1,435 $0 $7,260 $8,695
9.0 Toxicity (Potential) 20 $4,158 $550 $11,733 $16,441 Subtotal 1,928 $453,005 $14,989 $60,463 $528,457
10.0 Potential Special Studies
(Optional) To Be Determined
Total Requested Services 1,928 $453,005 $14,989 $60,463 $528,457 Potential Additional Services
New MS4 Permit Requirements
CIMP Update (Draft and Final) 0 $0 $0 $0 $0
Additional Cost Considerations
10% Contingency(2) $52,846
Total Potential Additional Services 0 $0 $0 $0 $52,846
Total All Services 1,928 $453,005 $14,989 $60,463 $581,303
1. Inclusive of subcontractor markup of 10%.
2. Contingencies could include but may not be limited to: additional toxicity testing (upstream sites or Toxicity Identification Evaluations [TIEs]), additional analysis to meet future screening requirements (e.g., similar to Table E-6, toxicity sensitive species), additional DNA/RNA analysis, and/or special studies.
Introduction0 App
Larry Walker Associates | Stormwater MonitoringProgram and NPDES PermitCompliance | 4 Cost Proposal
Table 3. Cost Breakdown by Task: Year 2
Task
No. Task Description
Total
Labor
Hours
Total
Labor
Costs
Other
Direct
Costs
Analytical
Costs Total(1)
1.0 Program Management 362 $94,881 $0 $0 $94,881
2.0 Dry Weather Monitoring 156 $31,121 $2,750 $11,000 $44,871
3.0 Dry Weather Monitoring -
Monthly Bacteria TMDL
Monitoring
214 $41,300 $6,189 $2,970 $50,459
4.0 Wet Weather Monitoring 175 $33,872 $5,500 $27,500 $66,872
5.0 Source ID Additional
Monitoring 59 $13,160 $0 $0 $13,160
6.0 Reporting 910 $226,418 $0 $0 $226,418
7.0 QAPP, Health and Safety Plan 27 $6,660 $0 $0 $6,660
8.0 Laboratory Analysis 5 $1,435 $0 $7,260 $8,695
9.0 Toxicity (Potential) 20 $4,158 $550 $11,733 $16,441 Subtotal 1,928 $453,005 $14,989 $60,463 $528,457
10.0 Potential Special Studies
(Optional) To Be Determined
Total Requested Services 1,928 $453,005 $14,989 $60,463 $528,457 Potential Additional Services
New MS4 Permit Requirements
CIMP Update (Draft and Final) 0 $0 $0 $0 $0
Additional Cost Considerations
10% Contingency(2) $52,846
Total Potential Additional Services 0 $0 $0 $0 $52,846
Total All Services 1,928 $453,005 $14,989 $60,463 $581,303
1. Inclusive of subcontractor markup of 10%.
2. Contingencies could include but may not be limited to: additional toxicity testing (upstream sites or Toxicity Identification Evaluations [TIEs]), additional analysis to meet future screening requirements (e.g., similar to Table E-6, toxicity sensitive species), additional DNA/RNA analysis, and/or special studies.
Introduction0 App
Larry Walker Associates | Stormwater MonitoringProgram and NPDES PermitCompliance | 5 Cost Proposal
Table 4. Cost Breakdown by Task: Year 3
Task
No. Task Description
Total
Labor
Hours
Total
Labor
Costs
Other
Direct
Costs
Analytical
Costs Total(1)
1.0 Program Management 362 $94,881 $0 $0 $94,881
2.0 Dry Weather Monitoring 156 $31,121 $2,750 $11,000 $44,871
3.0 Dry Weather Monitoring -
Monthly Bacteria TMDL
Monitoring
214 $41,300 $6,189 $2,970 $50,459
4.0 Wet Weather Monitoring 761 $140,231 $13,200 $39,050 $192,481
5.0 Source ID Additional
Monitoring 59 $13,160 $0 $0 $13,160
6.0 Reporting 910 $226,418 $0 $0 $226,418
7.0 QAPP, Health and Safety Plan 27 $6,660 $0 $0 $6,660
8.0 Laboratory Analysis 5 $1,435 $0 $7,260 $8,695
9.0 Toxicity (Potential) 20 $4,158 $550 $11,733 $16,441 Subtotal 2,513 $559,363 $22,689 $72,013 $654,066
10.0 Potential Special Studies
(Optional) To Be Determined
Total Requested Services
Potential Additional Services
New MS4 Permit Requirements
CIMP Update (Draft and Final) 158 $44,160 $0 $0 $44,160 Additional Cost Considerations
10% Contingency(2) $65,407
Total Potential Additional Services 158 $44,160 $0 $0 $109,567 Total All Services 2,671 $603,523 $22,689 $72,013 $763,632
1. Inclusive of subcontractor markup of 10%.
2. Contingencies could include but may not be limited to: additional toxicity testing (upstream sites or Toxicity Identification Evaluations [TIEs]), additional analysis to meet future screening requirements (e.g., similar to Table E-6, toxicity sensitive species), additional DNA/RNA analysis, and/or special studies.
Introduction0 App
Larry Walker Associates | Stormwater MonitoringProgram and NPDES PermitCompliance | 6 Cost Proposal
Table 5. Cost Breakdown by Firm: Three Year Summary
1. Inclusive of subcontractor markup of 10%.
2. Contingencies could include but may not be limited to: additional toxicity testing (upstream sites or Toxicity Identification Evaluations [TIEs]), additional analysis to meet future screening requirements (e.g., similar to Table E-6, toxicity sensitive species), additional DNA/RNA analysis, and/or special studies.
Introduction0 App
Larry Walker Associates | Stormwater MonitoringProgram and NPDES PermitCompliance | 7 Cost Proposal
Table 6. Staffing Hours and Rates: Three Year Summary
Task No. 1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 9.0 10.0
Potential
Additional
Services
Total Task Description
PM
Monitoring
Reporting QAPP,
HSP
Lab
Analysis
Toxicity
(Potential)
Potential
Special
Studies
(Optional) Rates Title Dry
Weather
Monthly
Bacteria
Wet
Weather
Source
ID
LWA
$365 Vice President 18 0 0 0 0 62 0 0 0 0 8 88
$324 Associate I 87 0 0 0 12 255 0 0 0 0 30 384
$287 Senior I 210 6 18 9 12 418 3 15 15 0 40 746
$265 Project Level
II-A 0 0 0 0 12 256 0 0 0 0 40 308
$236 Project Level
II-B 72 0 0 0 12 211 0 0 0 0 40 335
$165 Contract Admin 72 0 0 0 0 0 0 0 0 0 0 72
Tetra Tech
$385 Principal-in-
Charge 168 12 12 12 12 96 8 0 0 0 0 320
$370 Program
Manager 36 0 0 2 0 0 6 0 0 0 0 44
$250 Program
Engineer 3 0 36 24 6 0 320 16 0 0 0 0 402
$165 Staff Engineer
2 272 276 558 949 116 574 32 0 45 0 0 2,822
$175 Project
Engineer 0 138 30 133 0 538 16 0 0 0 0 855
$155 Senior Project
Administrator 150 0 0 0 0 0 0 0 0 0 0 150
Total 1,085 468 642 1,111 176 2,730 81 15 60 0 158 6,526