CITY OF RIVERSIDE
Wastewater Master Planning Services
TECHNICAL MEMORANDUM
Septage and Commercial Waste Tipping
Fees
FINAL / October 2023
TECHNICAL MEMORANDUM
OCTOBER 2023 / 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
Recommended Tipping Fee 8
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 2023/24) 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 6 Table 10 Receiving Station Capital Cost per 1,000 Gallons 7 Table 11 Receiving Station O&M per 1,000 Gallons 8
Table 12 Receiving Station Staff Costs per 1,000 Gallons 8 Table 13 Recommended Septage and Commercial Waste Tipping Fee 9
TECHNICAL MEMORANDUM
OCTOBER 2023 / 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
OCTOBER 2023 / 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, pounds of Biochemical Oxygen Demand (BOD), and pounds 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 2023/241 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 2023/24 begins on July 1, 2023.
TECHNICAL MEMORANDUM
OCTOBER 2023 / 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 2023/24 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 2023/24) Item Value
Riverside Customers Flow (MGD) 24.51
Annual Flow (MG) 8,946.15
Riverside Customers BOD Loading (lbs/day) 74,320
Annual BOD (lbs) 27,126,800
Riverside TSS Loading (lbs/day) 66,800
Annual TSS (lbs) 24,382,000
TECHNICAL MEMORANDUM
OCTOBER 2023 / 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 is 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 2023/24 and the applicability of each to septage or commercial waste treatment.
Table 3 Operating Costs Applicable to Septage or Commercial Waste Category
FY 2023/24
Projected Cost
($1,000s)
Applicable (%) Applicable ($) Notes
SEWER SYS-ADMIN $6,003 74.7% $4,484 Weighted average O&M allocation COLLECTION SYST MAINT $6,732 0.0% $0 Not applicable to treatment TREATMENT $16,517 100.0% $16,517 All costs applicable
ENVIRONMENTAL
COMPLIANCE
$1,265 0.0% $0 Not applicable to treatment
PLANT MAINTENANCE $3,726 100.0% $3,726 All costs applicable
ELECTRICAL AND
INSTRUMENTATION
$1,478 100.0% $1,478 All costs applicable
SEWER SCADA & SPL $798 100.0% $798 All costs applicable WAREHOUSE $194 100.0% $194 All costs applicable
LABORATORY SERVICES $1,009 100.0% $1,009 All costs applicable DEBT SERVICE $8 76.0% $6 Based on asset list
SEWER CAPITAL
ENGINEERING SERV
$534 69.9% $374 Based on asset list and CIP
PLANT CONST. SUPPORT ($28) 99.8% ($28) Based on CIP
Total O&M $38,237 74.7% $28,558
TECHNICAL MEMORANDUM
OCTOBER 2023 / 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 All Other
SEWER SYS-ADMIN $4,484 $0 $0 $0 $4,484 Weighted average allocation
COLLECTION SYST
MAINT
$0 $0 $0 $0 $0 Not applicable to septage
TREATMENT $16,517 $4,202 $7,475 $4,818 $23 Based on performance based budget model
ENVIRONMENTAL
COMPLIANCE
$0 $0 $0 $0 $0 Not applicable to septage
PLANT MAINTENANCE $3,726 $485 $932 $857 $1,452 Based on performance based budget model
ELECTRICAL AND
INSTRUMENTATION
$1,478 $281 $798 $266 $133 Based on performance
based budget model
SEWER SCADA & SPL $798 $175 $534 $88 $0 Based on performance based budget model
WAREHOUSE $194 $0 $0 $0 $194 Weighted average
allocation
LABORATORY
SERVICES
$1,009 $262 $404 $343 $0 Based on performance
based budget model
DEBT SERVICE $6 $0 $0 $0 $6 Based on asset list
SEWER CAPITAL
ENGINEERING SERV
$374 $0 $0 $0 $374 Based on asset list and
CIP
PLANT CONST.
SUPPORT
($28) ($16) ($9) ($3) $0 Based on CIP
Total O&M $28,558 $5,390 $10,134 $6,369 $6,665
Reallocation of As All Other $1,641 $3,085 $1,939 ($6,665) Resulting Allocation $7,031 $13,219 $8,308 $0
Percentage Allocation 24.6% 46.3% 29.1%
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
OCTOBER 2023 / FINAL / CAROLLO
CITY OF RIVERSIDE
SEPTAGE AND COMMERCIAL WASTE TIPPING FEES 5
Table 5 presents the calculation of revenue requirements for FY 2023/24 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 2023/24 Rev.
Req. ($1,000s)
Applicable
(%)
Applicable
($1,000s) Notes
Total O&M $38,237 74.7% $28,558 Weighted average of operating costs Debt Service $28,017 76.0% $21,280 Fixed assets related to treatment Net Cash Flows $3,463 69.9% $2,422 Fixed assets and capital related to treatment
Offsetting Revenues
Non-Rate Revenue ($1,819) 74.7% ($1,358) Weighted average of operating costs Connection Fees ($1,096) 69.9% ($767) Fixed assets and capital related to treatment CSD O&M Revenue ($3,130) 100.0% ($3,130) All treatment related Use of Money and Property ($909) 69.9% ($636) Fixed assets and capital related to treatment
Revenue Requirements $62,763 73.9% $46,370
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 All Other Notes
Total O&M $28,558 $7,031 $13,219 $8,308 $0 [Calculated] Debt Service $21,280 $9,576 $9,150 $2,554 $0 As Fixed Assets Net Cash Flows $2,422 $1,138 $993 $292 $0 Fixed Assets and Capital
Offsetting Revenues
Non-Rate Revenue ($1,358) $0 $0 $0 ($1,358) As All Others Connection Fees ($767) ($360) ($314) ($92) $0 Fixed Assets and Capital CSD O&M Revenue ($3,130) ($771) ($1,449) ($910) $0 As O&M Use of Money and
Property ($636) ($299) ($261) ($77) $0
Fixed Assets and Capital
Revenue Requirements $46,370 $16,316 $21,338 $10,074 $(1,358) Reallocation of As All Others ($464) ($607) ($286) $1,358 Resulting Allocation $46,370 $15,852 $20,731 $9,787 $0 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).
TECHNICAL MEMORANDUM
OCTOBER 2023 / FINAL / CAROLLO
CITY OF RIVERSIDE
SEPTAGE AND COMMERCIAL WASTE TIPPING FEES 6
Table 7 Treatment Unit Costs
FLOW BOD TSS
Allocated Rev. Req. ($1,000s) $15,852 $20,731 $9,787
Annual Units - Riverside Customers 8,946 27,127 24,382
MG klbs klbs
Unit Cost $1,772 $0.76 $0.40
per MG per lb per lb
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 $76.15 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 $1,772 $0.76 $0.40 n/a
per MG per lb per lb
Concentration (mg/L) n/a 5,400 12,000 n/a
Cost per Gallon1 $0.00177 $0.0343 $0.0401 $0.0761
Cost per 1,000 Gallons $1.77 $34.32 $40.06 $76.15
Notes:
(1) The cost per gallon for BOD and TSS is calculated as:
[Unit Cost ($/lb) x Concentration (mg/L) x 3.78 (gal./L) x 2.2 (lb/kg)] / [1,000,000 (mg/kg)] 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 $56.90 per 1,000 gallons. This calculation is summarized in Table 9.
Table 9 Commercial Waste Treatment Cost per 1,000 Gallons FLOW BOD TSS Total
Unit Cost $1,772 $0.76 $0.40 n/a
per MG per lb per lb
Concentration (mg/L) n/a 4,000 8,900 n/a
TECHNICAL MEMORANDUM
OCTOBER 2023 / FINAL / CAROLLO
CITY OF RIVERSIDE
SEPTAGE AND COMMERCIAL WASTE TIPPING FEES 7
FLOW BOD TSS Total
Cost per Gallon1 $0.00177 $0.0254 $0.0297 $0.0569
Cost per 1,000 Gallons $1.77 $25.42 $29.71 $56.90
Notes:
(1) The cost per gallon for BOD and TSS is calculated as:
[Unit Cost ($/lb) x Concentration (mg/L) x 3.78 (gal./L) x 2.2 (lb/kg)] / [1000000 (mg/kg)] 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. These costs include the construction and operation of two septage receiving stations and staff costs for two full-time operators to unload trucks.
The City has constructed one receiving station, and another is expected to be completed this fiscal year.
The total capital costs for the receiving stations and an attendant structure will be approximately $314,000. Assuming a 10-year useful life for the assets and a 5-percent interest rate for amortization, the annualized capital cost for the receiving stations is $41,000 per year. The annual cost is divided by the expected annual volume (from Table 1) resulting in a unit cost of $3.20 per 1,000 gallons of septage or commercial waste received. This calculation is presented in Table 10.
Table 10 Receiving Station Capital Cost per 1,000 Gallons Description Value
Project Costs
Septage Receiving Station 1 $59,165
Septage Receiving Station 2 $190,577
Septage Receiving Station Attendant Structure $64,573
Receiving Station Upgrades $314,315
Amortization Assumptions
Interest Rate 5.0%
Term (Years) 10
Annualized Capital Cost $41,000
Capital Unit Costs
Cost per gallon $0.00320
Cost per 1,000 gallons $3.20
Annual operating and maintenance (O&M) costs for the receiving stations are estimated at 2-percent of capital costs, approximately $6,300 per year. As shown in Table 11 this equates to $0.49 per 1,000 gallons of septage or commercial waste received based on the annual volume from Table 1.
TECHNICAL MEMORANDUM
OCTOBER 2023 / FINAL / CAROLLO
CITY OF RIVERSIDE
SEPTAGE AND COMMERCIAL WASTE TIPPING FEES 8
Table 11 Receiving Station O&M per 1,000 Gallons
Description Value
Receiving Stations Project Cost $314,315
Annual O&M % of Capital Cost 2%
Annual O&M $6,286
O&M Unit Costs
Cost per gallon $0.00049
Cost per 1,000 gallons $0.49
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 February 2023, 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 12 the annual cost for two operators is $254,000. 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 $20.76.
Table 12 Receiving Station Staff Costs per 1,000 Gallons Description Value
Operators
Annual Pay Per Operator $71,076
Annual Cost with Overhead per Operator1 $127,000
Annual Cost for 2 Operators $254,000
Startup Staffing Cost $10,000
Total Operators and Startup Costs $264,000
Operators Unit Cost
Cost per gallon $0.02076
Cost per 1,000 gallons $20.76
Notes:
(1) Based on FY 2021/22 actual costs, overhead is assumed at 79-percent of salary costs.
Recommended Tipping Fee
The recommended tipping fees are the sum of the treatment cost, receiving station capital and O&M costs, and the receiving station staff costs. As shown in Table 13, the recommended tipping fee is $100.60 per 1,000 gallons of septage or $81.35 per 1,000 gallons of commercial waste received.
TECHNICAL MEMORANDUM
OCTOBER 2023 / FINAL / CAROLLO
CITY OF RIVERSIDE
SEPTAGE AND COMMERCIAL WASTE TIPPING FEES 9
Table 13 Recommended Septage and Commercial Waste Tipping Fee Item
Septage
Cost per 1,000 Gallons
Commercial Waste
Cost per 1,000 Gallons
Treatment $76.15 $56.90
Receiving Station Capital $3.20 $3.20
Receiving Station O&M $0.49 $0.49
Receiving Station Staff $20.76 $20.76
Tipping Fee per 1,000 Gallons $100.60 $81.35
Notes:
(1) Presented totals may not tie due to rounding.
Conclusion
Based on the analysis and assumptions outlined in this memo, the calculated tipping fee for septage received at the RWQCP is $100.60 per 1,000 gallons, and the tipping fee for commercial waste received at the RWQCP is $81.35 per 1,000 gallons. The fees should be updated annually to reflect cost inflation using 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 to ensure that they recover the full cost of septage or commercial waste receiving and treatment.
TECHNICAL MEMORANDUM
OCTOBER 2023 / DRAFT / CAROLLO
CITY OF RIVERSIDE
FOOD WASTE TIPPING FEE
APPENDIX A DETAILED O&M AND REVENUE
REQUIREMENTS ALLOCATION
TECHNICAL MEMORANDUM
OCTOBER 2023 / DRAFT / CAROLLO
CITY OF RIVERSIDE
FOOD WASTE TIPPING FEE
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)
$1,771,068 74.69% As All Others $0 $0 $0 $0 $1,322,750 $1,322,750 $1,078,388 74.69% As All Others $0 $0 $0 $0 $805,411 $805,411 $152,493 74.69% As All Others $0 $0 $0 $0 $113,892 $113,892 $0 74.69% As All Others $0 $0 $0 $0 $0 $0
$3,172,775 74.69% As All Others $0 $0 $0 $0 $2,369,637 $2,369,637 ($171,544) 74.69% As All Others $0 $0 $0 $0 ($128,120) ($128,120) COLLECTION SYST MAINT (4125100)
$2,260,662 0% Not Applicable $0 $0 $0 $0 $0 $0
$1,713,476 0% Not Applicable $0 $0 $0 $0 $0 $0
$0 0% Not Applicable $0 $0 $0 $0 $0 $0
$2,213,619 0% Not Applicable $0 $0 $0 $0 $0 $0
$0 0% Not Applicable $0 $0 $0 $0 $0 $0
$635,060 0% Not Applicable $0 $0 $0 $0 $0 $0
($90,398) 0% Not Applicable $0 $0 $0 $0 $0 $0
TREATMENT (4125200)
$3,653,958 100% Operations $0 $950,029 $1,461,583 $1,242,346 $0 $3,653,958 $2,633,800 100% Power $0 $579,436 $1,764,646 $289,718 $0 $2,633,800 $4,000,000 100% Solids $0 $0 $2,000,000 $2,000,000 $0 $4,000,000 $3,963,660 100% Chemical $0 $1,902,557 $1,228,735 $832,369 $0 $3,963,660 $1,489,370 100% Treatment Ops $0 $506,386 $670,217 $297,874 $14,894 $1,489,370 $0 100% Treatment Ops $0 $0 $0 $0 $0 $0
$0 100% Treatment Ops $0 $0 $0 $0 $0 $0
$776,433 100% Treatment Ops $0 $263,987 $349,395 $155,287 $7,764 $776,433 $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)
$1,038,623 0% Not Applicable $0 $0 $0 $0 $0 $0
$151,255 0% Not Applicable $0 $0 $0 $0 $0 $0
$0 0% Not Applicable $0 $0 $0 $0 $0 $0
$58,344 0% Not Applicable $0 $0 $0 $0 $0 $0
$0 0% Not Applicable $0 $0 $0 $0 $0 $0
$142,428 0% Not Applicable $0 $0 $0 $0 $0 $0
($126,035) 0% Not Applicable $0 $0 $0 $0 $0 $0
PLANT MAINTENANCE (4125400)
$1,765,783 100% Mechanical $0 $229,552 $441,446 $406,130 $688,655 $1,765,783 $2,387 100% Chemical $0 $1,146 $740 $501 $0 $2,387
$1,189,128 100% Mechanical $0 $154,587 $297,282 $273,499 $463,760 $1,189,128 $0 100% Mechanical $0 $0 $0 $0 $0 $0
$427,363 100% Mechanical $0 $55,557 $106,841 $98,294 $166,672 $427,363 $381,238 100% Mechanical $0 $49,561 $95,309 $87,685 $148,683 $381,238 ($39,578) 100% Mechanical $0 ($5,145) ($9,895) ($9,103) ($15,435) ($39,578) ELECTRICAL AND INSTRUMENTATION (4125410)
$924,461 100% Electrical and Instrumentation $0 $175,648 $499,209 $166,403 $83,202 $924,461 $423,429 100% Electrical and Instrumentation $0 $80,452 $228,652 $76,217 $38,109 $423,429 $0 100% Electrical and Instrumentation $0 $0 $0 $0 $0 $0 $15,441 100% Electrical and Instrumentation $0 $2,934 $8,338 $2,779 $1,390 $15,441 $174,455 100% Electrical and Instrumentation $0 $33,146 $94,206 $31,402 $15,701 $174,455 ($59,600) 100% Electrical and Instrumentation $0 ($11,324) ($32,184) ($10,728) ($5,364) ($59,600) 100% Electrical and Instrumentation $0 $0 $0 $0 $0 $0
SEWER SCADA & SPL (4125420)
$447,884 100% SCADA $0 $98,535 $300,083 $49,267 $0 $447,884 $212,414 100% SCADA $0 $46,731 $142,318 $23,366 $0 $212,414 $44,310 100% SCADA $0 $9,748 $29,688 $4,874 $0 $44,310
$120,854 100% SCADA $0 $26,588 $80,972 $13,294 $0 $120,854 ($27,952) 100% SCADA $0 ($6,149) ($18,728) ($3,075) $0 ($27,952) Grants and Capital Projects
Charges from Others
Charges to Others
Personnel
Non‐Personnel
Grants and Capital Projects
Special Programs
Capital Purchases
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
Chemical Supplies
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)
$139,517 100% As All Others $0 $0 $0 $0 $139,517 $139,517 $9,275 100% As All Others $0 $0 $0 $0 $9,275 $9,275
$0 100% As All Others $0 $0 $0 $0 $0 $0
$45,810 100% As All Others $0 $0 $0 $0 $45,810 $45,810
($818) 100% As All Others $0 $0 $0 $0 ($818) ($818)
LABORATORY SERVICES (4125500)
$648,176 100% Operations $0 $168,526 $259,271 $220,380 $0 $648,176 $279,915 100% Operations $0 $72,778 $111,966 $95,171 $0 $279,915 $0 100% Operations $0 $0 $0 $0 $0 $0
$81,398 100% Operations $0 $21,163 $32,559 $27,675 $0 $81,398 DEBT SERVICE (4125600)
Administrative Costs $8,118 76% As All Others $0 $0 $0 $0 $6,166 $6,166 SEWER CAPITAL ENGINEERING SERV (4125900)
$1,093,182 70% As All Others $0 $0 $0 $0 $764,614 $764,614 $60,299 70% As All Others $0 $0 $0 $0 $42,176 $42,176
$667,082 70% As All Others $0 $0 $0 $0 $466,583 $466,583 ($1,286,450) 70% As All Others $0 $0 $0 $0 ($899,793) ($899,793) PLANT CONST. SUPPORT (4125910)
$336,246 100% As Fixed Assets $0 $195,181 $109,818 $30,647 $0 $335,646 $20,115 100% As Fixed Assets $0 $11,676 $6,570 $1,833 $0 $20,079 $35,219 100% As Fixed Assets $0 $20,444 $11,503 $3,210 $0 $35,157 ($419,406) 100% As Fixed Assets $0 ($243,453) ($136,978) ($38,227) $0 ($418,658) Total O&M $38,237,133 Initial Allocation $0 $5,390,275 $10,133,560 $6,369,089 $6,665,128 $28,558,052 Reallocation of As All Others $0.00 $1,641,027 $3,085,082 $1,939,019 ($6,665,128) Resulting Allocation $0 $7,031,302 $13,218,642 $8,308,108 $0 $28,558,052 Charges from Others
Charges to Others
Personnel
Non‐Personnel
Capital Purchases
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
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 Allocation Sewer Fund Total
Applicable to
Septage/
Comm. Waste
Allocation Basis PUMPING FLOW BOD TSS AS ALL OTHER TOTAL FY 2023/24
Total O&M 38,237,133 $ 74.7% [Calculated] $0 $7,031,302 $13,218, 642 $8,308,108 $0 $28,558,052 Debt Service (2) 28,016,824 76.0% As Fixed Assets $0 $9,576,478 $9,150, 308 $2,553,574 $0 $21,280,360 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 3,462,900 69.9% Fixed Assets and Capital $0 $1,137,796 $992,760 $291,530 $0 $2,422,086 Non‐Rate Revenue (3) (1,818,739) 74.7% As All Others $0 $0 $0 $0 ($1,358,356) ($1,358,356) Connection Fees (3) (1,096,281) 69.9% Fixed Assets and Capital $0 ($360,202) ($314,287) ($92,292) $0 ($766,781) CSD O&M Revenue (3) (3,129,581) 100.0% As O&M $0 ($770,537) ($1,448,587) ($910,458) $0 ($3,129,581) Use of Money and Property (3) (908,768) 69.9% Fixed Assets and Capital $0 ($298,591) ($260,530) ($76,506) $0 ($635,627) Revenue Requirements $62,763,488 73.9% $0 $16,316,245 $21,338,307 $10,073, 956 ($1,358,356) $46,370,152 Reallocation of As All Other ($464,361) ($607,289) ($286,705) $1,358,356 Resulting Allocation $15,851,884 $20,731,017 $9,787,251 $46,370,152 RIVERSIDE WASTEWATER UTILITY
Financial and Rate Model
Tipping Fees
SEPTAGE AND COMMERCIAL WASTE RECEIVING TIPPING FEE CALCULATION Allocation Basis PUMPING FLOW BOD TSS AS ALL OTHER TOTAL Not Included
Total Units 8,946.15 27,126,800 24,382,000
Flow (MG) BOD (lbs) TSS (lbs)
PER UNIT COSTS 1,771.92$ 0.76$ 0.40$
Septage Characteristics
BOD Concetration (mg/L) 5,400 0.00177$ 0.0343 $ 0.0401 $ TSS Concetration (mg/L) 12,000 Per Gallon Per Gallon Per Gallon Total Charge per Gallon 0.0761 $
Total per 1,000 Gallons 76.15 $
Commerical Waste Characeristics
BOD Concetration (mg/L) 4,000 0.00177$ 0.0254 $ 0.0297 $ TSS Concetration (mg/L) 8,900 Per Gallon Per Gallon Per Gallon Total Charge per Gallon 0.0569 $
Total per 1,000 Gallons 56.90 $
Mean of all samples
CA Revenue Program
Guidelines Appendix G