CITY OF RIVERSIDE
Wastewater Master Planning Services
TECHNICAL MEMORANDUM
Septage and Commercial Waste Tipping
Fees
FINAL / September 2024
TECHNICAL MEMORANDUM
SEPTEMBER 2024 / FINAL / CAROLLO
CITY OF RIVERSIDE
SEPTAGE AND COMMERCIAL WASTE TIPPING FEES i
Contents
Purpose 1
Methodology 1
Key Assumptions 1
Tipping Fees Calculations 3
Allocated RWQCP Operating Costs 3
Revenue Requirements and Unit Rates 4
Septage and Commercial Waste Receiving Costs 7
Calculated Tipping Fees 8
Smoothed Fee Implementation 9
Conclusion 9
Appendices
APPENDIX A DETAILED O&M AND REVENUE REQUIREMENTS ALLOCATION Tables
Table 1 Septage and Commercial Waste Volume and Concentrations) 2 Table 2 RWQCP City of Riverside Flow and Loads (Estimated for FY 2024/25) 2 Table 3 Operating Costs Applicable to Septage or Commercial Waste 3 Table 4 Applicable Operating Costs Functional Allocation ($1,000s) 4 Table 5 Revenue Requirements Applicable to Septage or Commercial Waste 5 Table 6 Applicable Revenue Requirements Functional Allocation ($1,000s) 5 Table 7 Treatment Unit Costs 6
Table 8 Septage Treatment Cost per 1,000 Gallons 6
Table 9 Commercial Waste Treatment Cost per 1,000 Gallons 7 Table 10 Receiving Station O&M per 1,000 Gallons 7
Table 11 Receiving Station Staff Costs per 1,000 Gallons 8 Table 12 Calculated Septage and Commercial Waste Tipping Fees, FY 2024/25 costs 8 Table 13 Projected Septage and Commercial Waste Tipping Fees 9 Table 14 Proposed Septage and Commercial Waste Tipping Fees 9
TECHNICAL MEMORANDUM
SEPTEMBER 2024 / FINAL / CAROLLO
CITY OF RIVERSIDE
SEPTAGE AND COMMERCIAL WASTE TIPPING FEES ii
Abbreviations
BOD Biochemical Oxygen Demand
Carollo Carollo Engineers
lbs pounds
mg/L milligrams per liter
mgd million gallons per day
RWQCP Regional Water Quality Control Plant
TSS total suspended solids
TECHNICAL MEMORANDUM
SEPTEMBER 2024 / FINAL / CAROLLO
CITY OF RIVERSIDE
SEPTAGE AND COMMERCIAL WASTE TIPPING FEES 1
Purpose
This technical memorandum presents the development of cost-based tipping fees for septage and commercial waste to be received and treated at the City of Riverside’s (City) Regional Water Quality Control Plant (RWQCP or plant).
Methodology
The tipping fee is calculated by determining the City’s unit costs to treat septage or commercial waste at the RWQCP per gallon of flow, per pound of Biochemical Oxygen Demand (BOD), and per pound of Total Suspended Solids (TSS). Then, those unit costs are applied to the assumed BOD and TSS concentrations for septage or commercial waste to determine a tipping fee per 1,000 gallons.
The analysis utilizes the financial model and the performance-based budget model that were developed during the recent (2019) master planning effort. The financial model has been updated to reflect the most recent fiscal year’s (FY) actual costs, budgeted revenues, inflation factors, and capital improvement plan.
The financial model is used to determine the total revenue requirements for the FY 2024/251 test year.
The performance-based budget model is used to allocate those revenue requirements to the functional constituents of Flow, BOD, and TSS. Those allocated costs are then divided by the total flows and loads to the plant to develop unit costs for each constituent. Lastly, the typical BOD and TSS concentrations are applied to the unit costs to determine the cost per volume of septage or commercial waste received.
The tipping fees also include components to recover costs for activities beyond the typical treatment process that the City performs specifically to receive and treat septage and commercial waste. These additional costs include capital and operating costs for the septage receiving stations and staff costs for the operators who will operate and maintain the receiving facilities.
Key Assumptions
The calculated tipping fees presented in this document are based on the following key assumptions and the costs, plant flows and loads, and septage or commercial waste characteristics outlined in subsequent sections of this memorandum. Should these assumptions or other conditions at the plant change, the tipping fee should be reevaluated.
The City currently receives an average of 1.06 million gallons of septage and commercial waste per month, equivalent to 12.7 million gallons per year. Table 1 summarizes the assumed septage and commercial waste volume and concentrations.
1 The fiscal years discussed in this Memorandum all begin on July 1 of the first year mentioned; for example, FY 2024/25 begins on July 1, 2024.
TECHNICAL MEMORANDUM
SEPTEMBER 2024 / FINAL / CAROLLO
CITY OF RIVERSIDE
SEPTAGE AND COMMERCIAL WASTE TIPPING FEES 2
Table 1 Septage and Commercial Waste Volume and Concentrations) Description Value
Septage and Commercial Waste Volume
Gallons per Month 1,060,000
Gallons per Day 34,850
MG per year 12.72
Septage Concentrations
BOD (mg/L)1 5,400
TSS (mg/L)1 12,000
Commercial Waste Concentrations
BOD (mg/L)2 4,000
TSS (mg/L)3 8,900
Notes:
(1) Concentration assumptions from California Revenue Program Appendix G. (2) Based on sampling data from Feb. 21, 2023 to Feb. 28, 2023, upper limit of all Chemical Oxygen Demand with a 99% confidence interval samples was 8,000 mg/L. Assumes COD to BOD ratio of 2:1. (3) Based on sampling data from Feb. 21, 2023 to Feb. 28, 2023, upper limit of TSS samples with a 99% confidence interval.
The estimated total flow and loads for the RWQCP for the FY 2024/25 test year are shown in Table 2. The annual values were estimated based on the flow and load projections developed for the 2019 Master Plan.
Revenues from the community services districts are applied as an offset to the total allocated treatment costs. Thus, the costs used to calculate the tipping fees are only those related to the City of Riverside customers and septage and commercial waste deliveries. Therefore, the flow and loads used to calculate the unit costs should only reflect those from City of Riverside customers and septage and commercial waste deliveries.
Table 2 RWQCP City of Riverside Flow and Loads (Estimated for FY 2024/25) Item Value
Riverside Customers Flow (MGD) 24.73
Annual Flow (MG) 9,026.45
Riverside Customers BOD Loading (lbs/day) 75,000
Annual BOD (lbs) 27,375,000
Riverside TSS Loading (lbs/day) 67,400
Annual TSS (lbs) 24,601,000
TECHNICAL MEMORANDUM
SEPTEMBER 2024 / FINAL / CAROLLO
CITY OF RIVERSIDE
SEPTAGE AND COMMERCIAL WASTE TIPPING FEES 3
Tipping Fees Calculations
The following sections outline the tipping fee calculations including the allocated RWQCP operating costs, allocated revenue requirements and unit costs, septage and commercial waste specific costs, and the final calculation of the tipping fees.
Allocated RWQCP Operating Costs
Operating costs applicable to the tipping fee are determined using a functional allocation that assigns each of the City’s operating costs to the constituents of Flow, BOD, and TSS. Within the functional allocation, each line-item is assigned an applicability to the septage and commercial waste fees based on whether its costs and function are needed to treat septage or commercial waste at the RWQCP. The assigned applicability assumes that septage and commercial waste are received at the headworks and therefore treated through the entirety of the plant's processes. The tipping fees also include a share of administrative expenditures, capital expenditures, and debt service based on the portion of those costs that are applicable to treatment. Because the septage or commercial waste is delivered directly to the RWQCP, costs associated with the collection system are not applicable. Table 3 shows the projected operating costs for FY 2024/25 and the applicability of each to septage or commercial waste treatment.
Table 3 Operating Costs Applicable to Septage or Commercial Waste Category
FY 2024/25
Projected Cost
($1,000s)
Applicable (%) Applicable ($) Notes
SEWER SYS-ADMIN $6,234 74.7% $4,656 Weighted average O&M allocation COLLECTION SYST MAINT $7,000 0.0% $0 Not applicable to treatment TREATMENT $17,177 100.0% $17,177 All costs applicable
ENVIRONMENTAL
COMPLIANCE $1,310 0.0% $0 Not applicable to treatment PLANT MAINTENANCE $3,867 100.0% $3,867 All costs applicable
ELECTRICAL AND
INSTRUMENTATION $1,533 100.0% $1,533 All costs applicable SEWER SCADA & SPL $827 100.0% $827 All costs applicable WAREHOUSE $201 100.0% $201 All costs applicable
LABORATORY SERVICES $1,047 100.0% $1,047 All costs applicable DEBT SERVICE ADMIN $8 76.0% $6 Based on asset list
SEWER CAPITAL
ENGINEERING SERV $554 69.9% $387 Based on asset list and CIP PLANT CONST. SUPPORT ($29) 99.8% ($29) Based on CIP
Total O&M $39,729 74.7% $29,672
Notes:
(1) Totals may not tie due to rounding.
TECHNICAL MEMORANDUM
SEPTEMBER 2024 / FINAL / CAROLLO
CITY OF RIVERSIDE
SEPTAGE AND COMMERCIAL WASTE TIPPING FEES 4
The second step in allocating operating costs is to assign the septage or commercial waste applicable costs to the functional constituents of Flow, BOD, and TSS. Table 4 shows the applicable costs allocated to functional constituents.
Table 4 Applicable Operating Costs Functional Allocation ($1,000s) Category Applicable O&M FLOW BOD TSS As Weighted
Average(1)
SEWER SYS-ADMIN $4,656 $0 $0 $0 $4,656
Weighted average
allocation
COLLECTION SYST
MAINT $0 $0 $0 $0 $0 Not applicable to septage
TREATMENT $17,177 $4,357 $7,779 $5,018 $24
Based on performance
based budget model
ENVIRONMENTAL
COMPLIANCE $0 $0 $0 $0 $0 Not applicable to septage
PLANT MAINTENANCE $3,867 $504 $967 $889 $1,507
Based on performance
based budget model
ELECTRICAL AND
INSTRUMENTATION $1,533 $291 $828 $276 $138
Based on performance
based budget model
SEWER SCADA & SPL $827 $182 $554 $91 $0
Based on performance
based budget model
WAREHOUSE $201 $0 $0 $0 $201
Weighted average
allocation
LABORATORY
SERVICES $1,047 $272 $419 $356 $0
Based on performance
based budget model
DEBT SERVICE $6 $0 $0 $0 $6 Based on asset list
SEWER CAPITAL
ENGINEERING SERV $387 $0 $0 $0 $387
Based on asset list and
CIP
PLANT CONST.
SUPPORT ($29) ($17) ($9) ($3) $0 Based on CIP
Total O&M $29,672 $5,589 $10,537 $6,628 $6,919
Reallocation of As All Other $1,700 $3,204 $2,016 ($6,919) Resulting Allocation $7,288 $13,741 $8,643 $0
Percentage Allocation 24.6% 46.3% 29.1%
Notes:
(1) Costs for general functions or those that are not easily categorized are allocated based on the weighted average allocation of all other directly allocable costs.
(2) Totals may not tie due to rounding.
Revenue Requirements and Unit Rates
The revenue requirements include all operating and maintenance (O&M), debt service, capital, and administrative costs that the City incurs each year as well as net cash flows which are necessary to provide capital funding in future years, meet the City’s debt coverage obligations, and support the Council approved reserve policy, less any offsetting revenues. To update the revenue requirements for this analysis, key inputs throughout the financial model were updated to reflect the latest financial information available to Carollo as of May 2023.
TECHNICAL MEMORANDUM
SEPTEMBER 2024 / FINAL / CAROLLO
CITY OF RIVERSIDE
SEPTAGE AND COMMERCIAL WASTE TIPPING FEES 5
Table 5 presents the calculation of revenue requirements for FY 2024/25 and the applicability of each revenue requirement element to septage or commercial waste receiving and treatment.
Table 5 Revenue Requirements Applicable to Septage or Commercial Waste ▪ FY 2024/25 Rev.
Req. ($1,000s)
Applicable
(%)
Applicable
($1,000s) Notes
Total O&M $39,729 74.7% $29,672 Weighted average of operating costs Debt Service $28,138 76.0% $21,372 Fixed assets related to treatment Net Cash Flows $5,267 69.9% $3,684 Fixed assets and capital related to treatment
Offsetting Revenues
Non-Rate Revenue ($1,825) 74.7% ($1,363) Weighted average of operating costs Connection Fees ($1,106) 69.9% ($774) Fixed assets and capital related to treatment CSD O&M Revenue ($3,369) 100.0% ($3,369) All treatment related Use of Money and Property ($970) 69.9% ($678) Fixed assets and capital related to treatment
Revenue Requirements $65,864 73.7% $48,544
Notes:
(1) Totals may not tie due to rounding.
Table 6 presents the allocation of applicable revenue requirements to each functional constituent.
Table 6 Applicable Revenue Requirements Functional Allocation ($1,000s) ▪ Applicable
Rev. Req. FLOW BOD TSS As Weighted
Average(1) Notes
Total O&M $29,672 $7,288 $13,741 $8,643 $0 [Calculated] Debt Service $21,372 $9,618 $9,190 $2,565 $0 As Fixed Assets Net Cash Flows $3,684 $1,730 $1,510 $443 $0 Fixed Assets and Capital
Offsetting Revenues
Non-Rate Revenue ($1,363) $0 $0 $0 ($1,363) As All Others Connection Fees ($774) ($363) ($317) ($93) $0 Fixed Assets and Capital CSD O&M Revenue ($3,369) ($828) ($1,560) ($981) $0 As O&M Use of Money and
Property ($678) ($319) ($278) ($82) $0 Fixed Assets and Capital
Revenue Requirements $48,544 $17,127 $22,285 $10,495 ($1,363) Reallocation of As All Others ($468) ($608) ($287) $1,363 Resulting Allocation $48,544 $16,659 $21,677 $10,208 $0 Notes:
(1) Items for general functions or those that are not easily categorized are allocated based on the weighted average allocation of all other directly allocable costs.
(2) Totals may not tie due to rounding.
TECHNICAL MEMORANDUM
SEPTEMBER 2024 / FINAL / CAROLLO
CITY OF RIVERSIDE
SEPTAGE AND COMMERCIAL WASTE TIPPING FEES 6
As shown in Table 7, unit costs for each functional constituent are calculated by dividing the total septage and commercial waste applicable costs for each constituent (from Table 6) by the corresponding units (from Table 2).
Table 7 Treatment Unit Costs
▪ FLOW BOD TSS
Allocated Rev. Req. ($1,000s) $16,659 $21,677 $10,208
Annual Units - Riverside Customers 9,026 27,375 24,601
MG klbs klbs
Unit Cost $1,846 $0.79 $0.41
per MG per lb per lb
Notes:
(1) Totals may not tie due to rounding.
The septage treatment cost reflects the unit costs from Table 7 and the assumed septage BOD and TSS concentrations from Table 1. As the septage fees are charged per 1,000 gallons received, the treatment cost is calculated by converting the unit rates per pound of BOD and TSS into costs per gallon at the assumed septage concentrations, then multiplying the cost per gallon by 1,000 resulting in a septage treatment cost of $78.81 per 1,000 gallons. This calculation is summarized in Table 8.
Table 8 Septage Treatment Cost per 1,000 Gallons
▪ FLOW BOD TSS Total
Unit Cost $1,846 $0.79 $0.41 n/a
per MG per lb per lb
Concentration (mg/L) n/a 5,400 12,000 n/a
Cost per Gallon1 $0.00185 $0.03556 $0.04141 $0.07881
Cost per 1,000 Gallons $1.85 $35.56 $41.41 $78.81
Notes:
(1) The cost per gallon for BOD and TSS is calculated as:
[Unit Cost ($/lb) x Concentration (mg/L) x 3.78 (gal./L) x 2.2 (lb/kg)] / [1,000,000 (mg/kg)] (2) Totals may not tie due to rounding.
The commercial waste treatment cost reflects the unit costs from Table 7 and the assumed commercial waste BOD and TSS concentrations from Table 1. The treatment cost is calculated by converting the unit rates per pound of BOD and TSS into costs per gallon at the assumed commercial waste concentrations, then multiplying the cost per gallon by 1,000 resulting in a commercial waste treatment cost of $58.90 per 1,000 gallons. This calculation is summarized in Table 9.
TECHNICAL MEMORANDUM
SEPTEMBER 2024 / FINAL / CAROLLO
CITY OF RIVERSIDE
SEPTAGE AND COMMERCIAL WASTE TIPPING FEES 7
Table 9 Commercial Waste Treatment Cost per 1,000 Gallons ▪ FLOW BOD TSS Total
Unit Cost $1,846 $0.79 $0.41 n/a
per MG per lb per lb
Concentration (mg/L) n/a 4,000 8,900 n/a
Cost per Gallon1 $0.00185 $0.0263 $0.0307 $0.0589
Cost per 1,000 Gallons $1.85 $26.34 $30.71 $58.90
Notes:
(1) The cost per gallon for BOD and TSS is calculated as:
[Unit Cost ($/lb) x Concentration (mg/L) x 3.78 (gal./L) x 2.2 (lb/kg)] / [1000000 (mg/kg)] (2) Totals may not tie due to rounding.
Septage and Commercial Waste Receiving Costs
Along with treatment costs, the City has and expects to incur additional costs to receive septage and commercial waste at the RWQCP.
Annual operating and maintenance (O&M) costs for the receiving stations are estimated at 2-percent of capital costs, approximately $2,475 per year. As shown in Table 10 this equates to $0.19 per 1,000 gallons of septage or commercial waste received based on the annual volume from Table 1.
Table 10 Receiving Station O&M per 1,000 Gallons
Description Value
Septage Receiving Station 1 $59,165
Septage Receiving Station Attendant Structure $64,573
Receiving Stations Project Cost $123,739
Annual O&M % of Capital Cost 2%
Annual O&M $2,475
O&M Unit Costs
Cost per gallon $0.00019
Cost per 1,000 gallons $0.19
Notes:
(1) Totals may not tie due to rounding.
Two additional staff members will be needed to operate the receiving station and unload trucks. The annual cost for each staff member is based on the City’s salary schedule as of July 5, 2024, assuming the Plant Operator 1 position at step 3. The overhead costs are estimated based on the actual overhead costs for FY 2021/22 for treatment plant staff. As shown in Table 11 the annual cost for two operators is
TECHNICAL MEMORANDUM
SEPTEMBER 2024 / FINAL / CAROLLO
CITY OF RIVERSIDE
SEPTAGE AND COMMERCIAL WASTE TIPPING FEES 8
$270,000. With an additional $10,000 in startup staffing costs, the total staff cost per 1,000 gallons of septage or commercial waste received, based on the annual volume from Table 1, is $21.97.
Table 11 Receiving Station Staff Costs per 1,000 Gallons Description Value
Operators
Annual Pay Per Operator $75,408
Annual Cost with Overhead per Operator1 $135,000
Annual Cost for 2 Operators $270,000
Startup Staffing Cost $10,000
Total Operators and Startup Costs $280,000
Operators Unit Cost
Cost per gallon $0.02197
Cost per 1,000 gallons $21.97
Notes:
(1) Based on FY 2021/22 actual costs, overhead is assumed at 79-percent of salary costs.
Calculated Tipping Fees
The calculated tipping fees are the sum of the treatment cost and the receiving station staff costs. As shown in Table 12, the calculated tipping fee, based on FY 2024/25 costs, is $101.00 per 1,000 gallons of septage or $81.10 per 1,000 gallons of commercial waste received.
Table 12 Calculated Septage and Commercial Waste Tipping Fees, FY 2024/25 costs Item
Septage
Cost per 1,000 Gallons
Commercial Waste
Cost per 1,000 Gallons
Treatment $78.81 $58.90
Receiving Station O&M $0.19 $0.19
Receiving Station Staff $21.97 $21.97
Total Cost per 1,000 Gallons $100.97 $81.06
Tipping Fee per 1,000 Gallons
(Rounded to Nearest $0.10) $101.00 $81.10
Notes:
(1) Calculated fees are rounded to the nearest $0.10.
To keep up with costs for receiving and treatment, tipping fees should be escalated each year in line with increases in costs at the RWQCP. Based on the financial model, treatment plant costs are expected to increase at 3.9-percent per year starting in FY 2025/26. Table 13 shows the projected tipping fees based on the expected inflation in treatment costs.
TECHNICAL MEMORANDUM
SEPTEMBER 2024 / FINAL / CAROLLO
CITY OF RIVERSIDE
SEPTAGE AND COMMERCIAL WASTE TIPPING FEES 9
Table 13 Projected Septage and Commercial Waste Tipping Fees Annual Escalation Residential Septage
(per 1,000 gallons)
Commercial Waste
(per 1,000 gallons)
FY 2024/25 (July 1, 2024) n/a $101.00 $81.10
FY 2025/26 (July 1, 2025) 3.9% $104.90 $84.30
Notes:
(1) Calculated fees are rounded to the nearest $0.10.
Smoothed Fee Implementation
The City plans to implement the projected tipping fees over time to smooth increases for waste haulers disposing of residential septage. As shown in Table 14, rates for residential septage will be updated to $60.00 per 1,000 gallons on January 1, 2025, then increase to the projected FY 2025/26 fee of $104.90 per 1,000 gallons on July 1, 2025. For commercial waste there is currently no charge because dumping of commercial waste is not allowed. Therefore, the fee will start at the projected FY 2024/25 fee of $81.10 per 1,000 gallons on January 1, 2025, and then increase to the projected FY 2025/26 rate of $84.30 per 1,000 gallons on July 1, 2025. After that time, the fees will be updated whenever the City’s other wastewater rates are updated.
Table 14 Proposed Septage and Commercial Waste Tipping Fees ▪ Residential Septage
(per 1,000 gallons)
Commercial Waste
(per 1,000 gallons)
Current Charge $30.00 n/a
January 1, 2025 $60.00 $81.10
July 1, 2025 $104.90 $84.30
Conclusion
Based on the analysis and assumptions outlined in this memo, the City should implement the tipping fees presented in Table 14. After that time, the fees should be updated annually, or whenever the City updates its other wastewater rates, based on the expected increase in treatment costs or another cost index such as the consumer price index, engineering news record construction cost index, or another metric identified by the City to estimate inflationary increases. Should any of the assumptions or other conditions at the plant change, the tipping fees should be reevaluated and adjusted so that they recover the full cost of septage or commercial waste receiving and treatment.
TECHNICAL MEMORANDUM
SEPTEMBER 2024 / FINAL / CAROLLO
CITY OF RIVERSIDE
SEPTAGE AND COMMERCIAL WASTE TIPPING FEES 10
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SEPTEMBER 2024 / FINAL / CAROLLO
CITY OF RIVERSIDE
SEPTAGE AND COMMERCIAL WASTE TIPPING FEES 11
APPENDIX A DETAILED O&M AND REVENUE
REQUIREMENTS ALLOCATION
TECHNICAL MEMORANDUM
SEPTEMBER 2024 / FINAL / CAROLLO
CITY OF RIVERSIDE
SEPTAGE AND COMMERCIAL WASTE TIPPING FEES 12
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RIVERSIDE WASTEWATER UTILITY
Financial and Rate Model
Tipping Fees
SEPTAGE AND COMMERCIAL WASTE RECEIVING TIPPING FEE CALCULATION Allocation Basis PUMPING FLOW BOD TSS AS ALL OTHER TOTAL Not Included
Sewer Fund Total
Applicable to
Septage/
Comm. Waste
Allocation Basis PUMPING FLOW BOD TSS AS ALL OTHER TOTAL SEWER SYS-ADMIN (4125000)
$1,833,055 74.69% As All Others $0 $0 $0 $0 $1,369,032 $1,369,032 $1,121,523 74.69% As All Others $0 $0 $0 $0 $837,619 $837,619 $158,592 74.69% As All Others $0 $0 $0 $0 $118,446 $118,446 $0 74.69% As All Others $0 $0 $0 $0 $0 $0
$3,299,686 74.69% As All Others $0 $0 $0 $0 $2,464,398 $2,464,398 ($178,406) 74.69% As All Others $0 $0 $0 $0 ($133,244) ($133,244) COLLECTION SYST MAINT (4125100)
$2,339,786 0% Not Applicable $0 $0 $0 $0 $0 $0
$1,792,021 0% Not Applicable $0 $0 $0 $0 $0 $0
$0 0% Not Applicable $0 $0 $0 $0 $0 $0
$2,302,164 0% Not Applicable $0 $0 $0 $0 $0 $0
$0 0% Not Applicable $0 $0 $0 $0 $0 $0
$660,462 0% Not Applicable $0 $0 $0 $0 $0 $0
($94,014) 0% Not Applicable $0 $0 $0 $0 $0 $0
TREATMENT (4125200)
$3,781,846 100% Operations $0 $983,280 $1,512,738 $1,285,828 $0 $3,781,846 $2,739,152 100% Power $0 $602,614 $1,835,232 $301,307 $0 $2,739,152 $4,196,153 100% Solids $0 $0 $2,098,076 $2,098,076 $0 $4,196,153 $4,102,388 100% Chemical $0 $1,969,146 $1,271,740 $861,501 $0 $4,102,388 $1,550,030 100% Treatment Ops $0 $527,010 $697,514 $310,006 $15,500 $1,550,030 $0 100% Treatment Ops $0 $0 $0 $0 $0 $0
$0 100% Treatment Ops $0 $0 $0 $0 $0 $0
$807,491 100% Treatment Ops $0 $274,547 $363,371 $161,498 $8,075 $807,491 $0 100% Treatment Ops $0 $0 $0 $0 $0 $0
Grants and Capital Projects
Special Programs
Capital Purchases
Charges from Others
Charges to Others
Personnel
Non-Personnel
Personnel
Non-Personnel
Grants and Capital Projects
Special Programs
Charges from Others
Charges to Others
Charges from Others
Personnel
Electric
Refuse/Disposal Fees
Chemical Supplies
Other Non-Personnel
Grants and Capital Projects
Capital Purchases
Charges to Others
RIVERSIDE WASTEWATER UTILITY
Financial and Rate Model
Tipping Fees
SEPTAGE AND COMMERCIAL WASTE RECEIVING TIPPING FEE CALCULATION Allocation Basis PUMPING FLOW BOD TSS AS ALL OTHER TOTAL Not Included
ENVIRONMENTAL COMPLIANCE (4125300)
$1,074,975 0% Not Applicable $0 $0 $0 $0 $0 $0
$157,305 0% Not Applicable $0 $0 $0 $0 $0 $0
$0 0% Not Applicable $0 $0 $0 $0 $0 $0
$60,677 0% Not Applicable $0 $0 $0 $0 $0 $0
$0 0% Not Applicable $0 $0 $0 $0 $0 $0
$148,126 0% Not Applicable $0 $0 $0 $0 $0 $0
($131,077) 0% Not Applicable $0 $0 $0 $0 $0 $0
PLANT MAINTENANCE (4125400)
$1,827,586 100% Mechanical $0 $237,586 $456,896 $420,345 $712,758 $1,827,586 $2,482 100% Chemical $0 $1,191 $769 $521 $0 $2,482
$1,236,693 100% Mechanical $0 $160,770 $309,173 $284,439 $482,310 $1,236,693 $0 100% Mechanical $0 $0 $0 $0 $0 $0
$444,458 100% Mechanical $0 $57,779 $111,114 $102,225 $173,338 $444,458 $396,487 100% Mechanical $0 $51,543 $99,122 $91,192 $154,630 $396,487 ($41,161) 100% Mechanical $0 ($5,351) ($10,290) ($9,467) ($16,053) ($41,161) ELECTRICAL AND INSTRUMENTATION (4125410)
$956,818 100% Electrical and Instrumentation $0 $181,795 $516,682 $172,227 $86,114 $956,818 $440,366 100% Electrical and Instrumentation $0 $83,670 $237,798 $79,266 $39,633 $440,366 $0 100% Electrical and Instrumentation $0 $0 $0 $0 $0 $0 $16,059 100% Electrical and Instrumentation $0 $3,051 $8,672 $2,891 $1,445 $16,059 $181,433 100% Electrical and Instrumentation $0 $34,472 $97,974 $32,658 $16,329 $181,433 ($61,984) 100% Electrical and Instrumentation $0 ($11,777) ($33,471) ($11,157) ($5,579) ($61,984) 100% Electrical and Instrumentation $0 $0 $0 $0 $0 $0
SEWER SCADA & SPL (4125420)
$463,560 100% SCADA $0 $101,983 $310,585 $50,992 $0 $463,560 $220,911 100% SCADA $0 $48,600 $148,010 $24,300 $0 $220,911 $46,083 100% SCADA $0 $10,138 $30,876 $5,069 $0 $46,083 $125,688 100% SCADA $0 $27,651 $84,211 $13,826 $0 $125,688 ($29,070) 100% SCADA $0 ($6,395) ($19,477) ($3,198) $0 ($29,070) Grants and Capital Projects
Charges from Others
Charges to Others
Personnel
Non-Personnel
Grants and Capital Projects
Special Programs
Capital Purchases
Chemical Supplies
Capital Purchases
Charges from Others
Charges to Others
Personnel
Non-Personnel
Grants and Capital Projects
Capital Purchases
Charges from Others
Charges to Others
Personnel
Non-Personnel
Personnel
Non-Personnel
Capital Purchases
Charges from Others
Charges to Others
RIVERSIDE WASTEWATER UTILITY
Financial and Rate Model
Tipping Fees
SEPTAGE AND COMMERCIAL WASTE RECEIVING TIPPING FEE CALCULATION Allocation Basis PUMPING FLOW BOD TSS AS ALL OTHER TOTAL Not Included
WAREHOUSE (4125430)
$144,400 100% As All Others $0 $0 $0 $0 $144,400 $144,400 $9,646 100% As All Others $0 $0 $0 $0 $9,646 $9,646
$0 100% As All Others $0 $0 $0 $0 $0 $0
$47,643 100% As All Others $0 $0 $0 $0 $47,643 $47,643
($851) 100% As All Others $0 $0 $0 $0 ($851) ($851)
LABORATORY SERVICES (4125500)
$670,863 100% Operations $0 $174,424 $268,345 $228,093 $0 $670,863 $291,112 100% Operations $0 $75,689 $116,445 $98,978 $0 $291,112 $0 100% Operations $0 $0 $0 $0 $0 $0
$84,654 100% Operations $0 $22,010 $33,862 $28,782 $0 $84,654 DEBT SERVICE (4125600)
Administrative Costs $8,443 76% As All Others $0 $0 $0 $0 $6,413 $6,413 SEWER CAPITAL ENGINEERING SERV (4125900)
$1,131,443 70% As All Others $0 $0 $0 $0 $791,375 $791,375 $62,711 70% As All Others $0 $0 $0 $0 $43,863 $43,863
$693,765 70% As All Others $0 $0 $0 $0 $485,246 $485,246 ($1,334,188) 70% As All Others $0 $0 $0 $0 ($933,183) ($933,183) PLANT CONST. SUPPORT (4125910)
$348,015 100% As Fixed Assets $0 $202,013 $113,662 $31,720 $0 $347,394 $20,919 100% As Fixed Assets $0 $12,143 $6,832 $1,907 $0 $20,882 $36,628 100% As Fixed Assets $0 $21,262 $11,963 $3,338 $0 $36,563 ($434,501) 100% As Fixed Assets $0 ($252,215) ($141,908) ($39,602) $0 ($433,726) Total O&M $39,729,048 Initial Allocation $0 $5,588,631 $10,536,515 $6,627,562 $6,919,304 $29,672,012 Reallocation of As All Others $0.00 $1,699,553 $3,204,250 $2,015,501 ($6,919,304) Resulting Allocation $0 $7,288,184 $13,740,765 $8,643,063 $0 $29,672,012 Charges from Others
Charges to Others
Personnel
Non-Personnel
Capital Purchases
Charges from Others
Personnel
Non-Personnel
Charges from Others
Charges to Others
Personnel
Non-Personnel
Charges from Others
Charges to Others
Personnel
Non-Personnel
Capital Purchases
RIVERSIDE WASTEWATER UTILITY
Financial and Rate Model
Tipping Fees
SEPTAGE AND COMMERCIAL WASTE RECEIVING TIPPING FEE CALCULATION Allocation Basis PUMPING FLOW BOD TSS AS ALL OTHER TOTAL Not Included
Revenue Requirements AllocationSewer Fund Total
Applicable to
Septage/
Comm. Waste
Allocation Basis PUMPING FLOW BOD TSS AS ALL OTHER TOTAL FY 2024/25
Total O&M 39,729,048 $ 74.7% [Calculated] $0 $7,288,184 $13,740,765 $8,643,063 $0 $29,672,012 Debt Service (2) 28,137,523 76.0% As Fixed Assets $0 $9,617,734 $9,189,728 $2,564,575 $0 $21,372,038 Rate Funded Capital - 69.9% Fixed Assets and Capital $0 $0 $0 $0 $0 $0 Capital Contributions - 0.0% As All Others $0 $0 $0 $0 $0 $0 Minimum Operating Fund Balance - 0.0% As All Others $0 $0 $0 $0 $0 $0 Adjustment for Rate Delay - 0.0% As All Others $0 $0 $0 $0 $0 $0 Equipment Replacement - 0.0% As All Others $0 $0 $0 $0 $0 $0 Net Cash Flows 5,266,799 69.9% Fixed Assets and Capital $0 $1,730,498 $1,509,910 $443,394 $0 $3,683,802 Non-Rate Revenue (3) (1,824,571) 74.7% As All Others $0 $0 $0 $0 ($1,362,698) ($1,362,698) Connection Fees (3) (1,106,189) 69.9% Fixed Assets and Capital $0 ($363,458) ($317,128) ($93,126) $0 ($773,712) CSD O&M Revenue (3) (3,369,053) 100.0% As O&M $0 ($827,523) ($1,560,170) ($981,360) $0 ($3,369,053) Use of Money and Property (3) (969,567) 69.9% Fixed Assets and Capital $0 ($318,568) ($277,960) ($81,624) $0 ($678,152) Revenue Requirements $65,863,990 73.7% $0 $17,126,868 $22,285,147 $10,494,921 ($1,362,698) $48,544,238 Reallocation of As All Other ($467,645) ($608,491) ($286,562) $1,362,698 Resulting Allocation $16,659,222 $21,676,656 $10,208,359 $48,544,238