Agreement
Between
RUBIDOUX COMMUNITY SERVICES DISTRICT
and
CITY OF RIVERSIDE
Regarding
Management of Total Dissolved Solids
This Agreement is by and between Rubidoux Community Services District ("District"), a California special district, and the City of Riverside ("Riverside"), a California charter city and municipal corporation, regarding the District's management of total dissolved solids ("TDS") in sewage delivered to Riverside for treatment and disposal. District and Riverside can be collectively referred to herein as "Parties" or individually as "Party".
Recitals
A. Riverside owns and operates a 46.0 MGD rated regional wastewater treatment plant ("Riverside WWf P") and must comply with Order No. R8-2013-0016 NP DES Permit No. CA0105350, issued by the State of California Regional Water Quality Control Board Santa Ana Region. Current flows to the Riverside wwrp are approximately 28 MGD.
B. The Riverside wwrP has and continues to operate in compliance with the NP DES Permit.
C. Through contracts dating back to 1978 the District has acquired 3.055 MGD of treatment and disposal rights in the Riverside wwrP. Current sewage flow from the District to the Riverside wwrP average approximately 1.7 MGD.
D. In addition to sewage flow from Riverside and the District, the Riverside wwrP receives sewage for treatment and disposal from Jurupa Community Services District and Edgemont Community Services District.
E. The District is reliant on local groundwater for its potable water supply. Historically and currently the local groundwater has a total dissolved solids ("TDS") concentration averaging approximately 491 mg/L. When you factor in a use increment added by residential and non-residential customers, the resulting 1 sewage collected from within the District's service area has a TDS concentration averaging approximately 790 mg/L.
F. The current NPDES Permit issued to Riverside has a TDS effluent concentration limit of 650 mg/L for tertiary treated water discharged to the Santa Ana River.
Currently, the TDS effluent concentration of treated water discharged from the Riverside wwrP to the Santa Ana River is approximately 600 mg/L based on a twelve-month weighted running average. This TDS concentration is based on the aggregate of the sewage treated at the Riverside wwrP.
G. The Rio Vista Specific Plan (the "Rio Vista Project") is a significant project currently being developed by Richland Communities within the City of Jurupa Valley. The Rio Vista Project seeks annexation into the District's service area. Spanning 917 acres, the Rio Vista Project will feature 1,697 residential homes, approximately 1.2 million square feet of light industrial and 1.4 million square feet of business park space, 510.8 acres dedicated to open space, 14.3 acres of park and recreational amenities, and 13.4 acres for public school sites. Additionally, the Rio Vista Specific Plan aims to generate approximately 3,000 permanent jobs, significantly contributing to the local economy and infrastructure of the City of Jurupa Valley.
H. The Rio Vista Project is expected to have a substantial financial impact on the District upon full buildout. The District stands to collect approximately $22 million in one-time capacity fees, along with an estimated $3.2 million in annual recurring charges for water, wastewater, and solid waste services. In addition, the District is projected to receive approximately $1.2 million annually in property tax revenue.
I. Riverside has submitted letters to the Riverside County Local Agency Formation Commission ("LAFCO") objecting to the District's annexation of the Rio Vista Project due to concerns about the District's elevated TDS concentrations. The City opposes the Rio Vista Project service area being annexed to the District for sewer service until the District develops a TDS Management Plan that can be implemented by the District to manage the TDS concentration in untreated sewage the District sends to the Riverside wwrP.
2 J. To address concerns regarding the District's TDS concentrations, the District has:
a. Removed a high-volume industrial discharger from the District's sewage collection system to the Inland Empire Brine Line. This effort cost the District over $2.3 million and was completed in November 2019. b. Executed agreements to have access to low TDS concentration potable water to blend with local groundwater supply to enable delivering current and buildout sewage flows to the Riverside WWTP from the District at or below 650 mg/L TDS. Access agreements were completed in June 2024. c. Completed a TDS Management Plan, attached hereto for reference, detailing specific actions the District will implement at certain "triggers" to avoid Riverside becoming at risk of non-compliance with its NPDES Permit TDS concentration limits due to sewage flows from the District.
Concurrence with the TDS Management Plan between the Parties to this Agreement occurred in April 2025.
K. Riverside requires the Parties to enter into an Agreement to memorialize understandings related to the TDS Management Plan and obligations each of the Parties have related thereto. This Agreement is a stand-alone agreement and does not alter or amend any prior agreements or contracts between the Parties, and creates no new duties or obligations on the Parties beyond those expressly stated.
NOW THEREFORE the parties mutually agree as follows:
1. The Riverside WWTP is a facility providing sewage treatment and disposal services to Riverside and the following contract public agencies - District, Jurupa Community Services District and Edgemont Community Services District.
Riverside as owner and operator of the Riverside WWTP requires all dischargers to deliver sewage Riverside can treat and dispose of in compliance with NPDES Permit No. CA0105350.
2. TDS concentration of tertiary treated water discharged to the Santa Ana River from the Riverside WWTP fluctuates over time with variables such as seasonal snow 3 melt and precipitation, potable water supply, long-term drought periods, and quality of sewage from dischargers.
3. The Parties agree as of the execution of this Agreement the Riverside WVVTP rolling 12-month TDS concentration weighted average for effluent is approximately 600 mg/L.
4. The District's TDS Management Plan, through its service area buildout, is intended to manage the TDS concentration in its sewage delivered to the Riverside WVVTP to a level at or below 650 mg/L.
5. District shall:
a. Include a condition in the Plan of Service and Environmental Impact Report for the for the Rio Vista Project requiring that a physical potable water supply intertie with West Valley Water District capable of moving up to 2,000 AFY of low TDS concentration water be built.
b. In the event that 750 equivalent dwelling units ("EDU"), defined as ¾ inch water meter connection, are connected for sewer service within the District's current or expanded service area prior to the Rio Vista Project building the physical intertie with West Valley Water District, the District will cause to build the physical intertie itself within 12 months of connection of the 750th EDU. The count on the future 750 EDUs will start on the date the last Party executes this Agreement.
c. Purchase low TDS potable water through the intertie with West Valley Water District to blend with the District's groundwater supply in sufficient volumes to enable the District's TDS concentration in sewage delivered to the Riverside WWTP to be 650 mg/Lor less in the event the TDS concentration in tertiary treated water discharged from the Riverside WVVTP reaches the following Triggering TDS Concentrations:
4 Period TDSmg
12 Month Average 620
5 Year Average 626
10 Year Average 627
15 Year Average 624
20 Year Average 618
d. These Triggering TDS Concentrations have been determined based on the current NPDES permit TDS compliance calculation and anticipated compliance calculation of a forthcoming NPDES permit. The Triggering TDS Concentrations may be adjusted to reflect future controlling NPDES permits that may use a compliance calculation different from the current and anticipated compliance calculation utilized herein.
e. In the event of any changes in TDS conditions in sewage delivered to the Riverside WWTP, the District may request that Riverside reevaluate and/or amend the Triggering TDS Concentrations, which may include discontinuing the purchase of water through the intertie. Any reevaluation and/or amendment of the Triggering TDS Concentrations requested by the District, including the discontinuation of water purchases, shall be at the sole discretion of Riverside.
f. If the District successfully implements groundwater treatment solutions, such as a Reverse Osmosis plant, that eliminates the need for imported water and enables independent compliance with the NPDES permit, it may discontinue purchasing water through the intertie.
6. Riverside shall:
a. Notify LAFCO within thirty (30) calendar days of the date of the execution of this Agreement that Riverside has approved the District's TDS Management Plan and no longer objects to annexations of the new service areas currently proposed, including the Rio Vista Project, into the District for sewer service.
5 b. Provide the District with prompt written notice if and/or when the Riverside WWTP discharge reaches the Triggering TDS Concentration as set forth in Section 5c above.
7. Enforcement - If either Party substantially fails to perform or materially breaches the Agreement, the non-performing or breaching Party shall substantially perform and cure such breach within forty-five (45) days of written notice thereof. In the event non-performance or breach continues thereafter, the Parties agree to meet within ten (10) days to resolve the issue. Should the issue not be resolved by meeting of the Parties an action may be brought. In the event either party hereto shall bring suit to enforce any term of this Agreement or to recover any damages for and on account of the breach or any term or condition of this Agreement, it is mutually agreed that each party will bear their own attorney's fees and costs.
8. Integrated Agreement - In the event of any conflict, inconsistency, incongruity, or interpretational dispute between the terms of this Agreement and the provisions of any other agreement between the District and Riverside, the provisions of this Agreement shall govern and control regarding TDS Management in sewage delivered by the District to Riverside. This Agreement constitutes the entire Agreement between the parties pertaining to the subject matter hereof, and there are no warranties, representations, or other agreements between the parties on the subjects herein contained except as expressly provided in this Agreement. No supplementation, modification, waiver, or termination of this Agreement shall be binding unless executed by the party to be bound thereby.
9. Notices - Any notices to the Parties shall be delivered by US mail and email to the following:
Rubidoux Community Services District
Attn: Brian Laddusaw
3590 Rubidoux Blvd.
Jurupa Valley, CA 92509
[email protected]
6 City of Riverside
Attn: Edward Filadelfia
5950 Acorn Street
Riverside, CA 92504
[email protected]
10. Digital and Counterpart Signatures. Each party to this Agreement intends and agrees to the use of digital signatures that meet the requirements of the California Uniform Electronic Transactions Act (Civil Code §§ 1633.1, et seq.), California Government Code § 16.5, and California Code of Regulations Title 2 Division 7 Chapter 10, to execute this Agreement. The parties further agree that the digital signatures of the parties included in this Agreement are intended to authenticate this writing and to have the same force and effect as manual signatures for purposes of validity, enforceability, and admissibility. For purposes of this section, a "digital signature" is defined in subdivision (d) of Section 16.5 of the Government Code and is a type of "electronic signature" as defined in subdivision (h) of Section 1633.2 of the Civil Code. This Agreement may be executed in any number of counterparts, each of which will be an original, but all of which together will constitute one instrument. Each certified or authenticated electronic copy of an encrypted digital signature shall be deemed a duplicate original, constituting one and the same instrument and shall be binding on the parties hereto. [SIGNATURES ON FOLLOWING PAGE.]
7 IN WITNESS WHEREOF , the Parties have executed this Agreement as of the last date indicated below.
City of Riverside Rubidoux Community Services District
Its: -----------
Date: ----------
Attest:
City Clerk
Approved as to form:
~~/~
Tarren A. Torres
Deputy City Attorney
308175 TAT 1/15/26
8 EXHIBIT "A"
TDS MANAGEMENT PLAN
RUBIDOUX COMMUNITY SERVICES DISTRICT
TOTAL DISSOLVED SOLIDS MANAGEMENT PLAN
April 2025
Introduction
Rubidoux Community Services District tRubidoux") Is a community services district formed In December 1952 predominantly serving the easterly portion of the City of Jurupa Valley (incorporated July 1, 2011) ln western Riverside County, California, with approximately 120 acres in San Bernardino County, Rubidoux is located approximately 50 miles east of Los Angeles, and is bounded by San Bernadina County on the north, the Jurupa· Mountains and Pedley HIiis on the northwest, unincorporated areas of Jurupa on the west1 the Santa Ana River on the south, and the City of Riverside on the east. Rubldoux's current boundaries encompass an area of approximately 8 square miles of service territory. Ground surface elevations within Rubidoux 1 s
service area range from approximately 760 feet to 1,250 feet above sea level.
Rubidoux currently provides the following services: water supply, wastewater collection and disposal, trash collection, fire protection, weed abatement and street lighting. Within Its service territory Includes a population of approximately 40,000, with 6,687 water customers and 6,216 wastewater customers. Rubidoux's service area consists mainly of slngle~family residential customers, but also includes an Industrial/manufacturing sector (located mostly In the northerly portion of the service area), along with commercial/institutional and landscape connections.
Potable water delivered by Rubidoux to Its customers Is 100% from local groundwater, which is currently pumped from six (6) active wells. In addition, there is an interagency intertie with Jurupa Community Services District ("JCSD"} where potable water can be moved between the two districts. This lntertie located on Jewel Street has predominantly been used to move Rubidoux -water to JCSD as - 1) Rubidoux has continuously had surplus raw groundwater ·-- ••• -• ···prodm::tion·and·treatment capireity, -and 2)·1csD's'carrenra1str1butio1'f sVstem • HnJnable to·move •• Chino Desalter water In sufficient quantities to improve Rubldoux's total dissolved solids ("TDS"} concentration. Rubidoux's wastewater collection system consists of approximately 68 miles of gravity sewers ranging in size from 6 Inches to 27 Inches in diameter, and six sewage lift stations.
Wastewater is collected and transmitted to the City of Riverside's Regional Water Quality Control Plant for treatment and discharge to the Santa Ana River. 1 Active Rubidoux wells pump water from the Riverside South Groundwater Basin and all the pumped raw groundwater requires some level of treatment to meet current State Water Board Division of Drinking Water permit requirements for delivery of potable water within Rubldoux's jurisdiction. Below rs a table showing treatment processes Included for each Rubidoux Well:
Well Max Flow Avg Flow
··-········· • ··iiiiimf'"·· • fgpm) · Contaminants·············-·······················-Treatment Processes··········-···-· .. Treatment location 1A 1500 1500
•• •••n-••••""'""''" • ............. PFAs ........ ··-····· ...... -· .... ········•-······-·10n .. exchange ········-···········-····-····Thompson ...... . ........ Managanese ........................................... oxlclatlon .& flltrntion .. ............... ....... . .. -······· ....................... . . . ....
2 800 400 .. Nitrate &.Perchlorate ............. Blending.with effluent from Thompson.Plant ............ ~.Y.~l◊-n ....... . .............. PFAS.& 1,2,3'TCP._ ........................................... GAC ................................................ ·····-···· .. . 8 1500 ........ ·······-·-··-· ...... 1260 .... ... . PY~.s ............................................... Ion.Exchange .................................. Thompson ....... . 18 1500 1300 PFAS
Managanese
P,F~/'.\ ..
oxidation & filtration
Thomps.o~ ..
..... ····-·
4 l.200
6 2200 ··-··-··--•·•-··· --··•······
1200 Nitrate ........................ ---··
PFAS
.. 2200 ..... ······--···············--Nitrate
PFAS
Ion ~xchange
GAC
Smith
Ion ~xchange···--····--·--·····- -··-··•··Smith_•···-· GAC
With its active wells and treatment processes at 60% run time Rubidoux can produce approximately 8,300 acre-feet/year ("AFY''} of potable water. Current potable demand is approximately 4,500 AFY. Rubidoux'.s estimated ultimate potable water demand is 10,800 AFY (per 2022 Rubidoux Water Master Plan).
From a water supply standpoint, Rubidoux is positioned well. There is sufficient groundwater production and treatment capacity to meet current potable water demands with redundancy, If •••• • pofa tiie·water rJema.n"i-is.iiicre"a"se over"t1m·e; Rufi·, doux"wff1 neea·1:o·eva1u"ate-va rfous sti°pp1y·option·s • •••• • ranging from addition of new production wells with treatment, purchase of available groundwater with low TDS concentrations from other local agencies, or buying imported supply from Metropolitan Water District.
2 Beyond the above listed contaminants being treated from the produced raw groundwater, the raw groundwater has an ambient TDS concentration which is relatively high. Below is a table showing TDS concentration data from Rubidoux's Consumer Confidence Reports for years 2019 - 2022:
Year Range Average
(mg/I) (mg/I)
2019 460 530 498
2020 470 510 478
2021 480 550 496
2022 470 510 492
Average 491
After use of the delivered potable water, Rubidoux customer wastewater discharge has a 12- month rolling average TDS concentration of approximately 787 milligrams/liter ("mg/I") through October 2023. The graphic below shows a 10-year TDS concentration history (2013-2023) of Rubidoux's wastewater delivered to Riverside's treatment plant. 1200
1000
-:::, 800
E° !~~
200
0 Rubidoux TDS - WWTP Influent
Date
Over the above captioned timeframe, Riverside's treatment plant has met its effluent limits for TDS under the current NPDES permit (2013).
3 Wastewater Treatment Relationship Between Riverside and District The City of Riverside ("Riverside") owns a 46 million gallons/day ("MGD") wastewater treatment plant. Through contracts, Rlverside provides primary, secondary> and tertiary wastewater treatment and disposal services to Rubidoux, JCSD, and Edgemont Community Services District ("Edgemont'1). Rubidoux owns 3,055 MGD of capacity rights in Riverside's wastewater treatment plant. Currently Rubidoux delivers approximately 1. 7 MGD of wastewater to Riverside's plant or 620 MG annually.
Riverside and the agencies who contract with it for wastewater treatment and disposal are part of the Regional Advisory Committee ("RAC"). The RAC is comprised of Riverside, JCSD, Edgemont, Rubidoux, and Western Municipal Water District {"Western"), The RAC Is the forum where the Involved contracting agencies meet and vote on a variety of Issues related to the operation of Riverside's wastewater treatment plant. Issues Include: treatment and surcharge rates, capital contributions for plant upgrades, regulatory compliance issues (including TDS management), and long~term planning. Western does not send wastewater to Riverside for treatment but ls Involved in the RAC as it assisted Riverside, Rubidoux, and JCSD (all agencies within Western's General District area) in the late 1970's in the planning for and acquisition of state and federal funding to expand Rlverslde
1 s standalone wastewatertreatment plant Into a reglonal treatment facility for multiple agencies. This effort was memorialized in part by two agreements, one dated in 1976, the second In 1978. The agreement entitled "Agreement For Regional Primary and Secondary Treatment" dated May 4, 1978 ("1978 Agreement") established, among other things, water quality requirements for regional plant and responsibilities of each of the dischargers, Only Riverside, JCSD, and Rubidoux have voting rights in RAC and Western serves as the tie-breaking vote. Edgemont does not have a vote.
Pursuant to Section 10 of the 1978 Agreement, attached Exhibit B1 executed between Riverside, Rubidoux, Western, and JCSD, language is included which states - "Notwithstanding any other provisions of this Agreement, Riverside, Jurupa and Rubidoux shall each have the responsibility 4 of delivering to the regional primary and secondary treatment facilities a quality of water which independently complies with all lawful requirements of any regulatory authority of competent jurisdiction. This responsibility shall include measures, If necessary, to improve the respective water supply of any party if the poor quality of its supply causes or threatens violations of any regulatory authority requirements."
Riverside operates its wastewater treatment plant pursuant to NPDES Permit No. CA0105350 ("Permit") issued by the California Regional Water Quality Control Board, Santa Ana Region. The Permit establishes requirements Riverside must meet for discharge of recycled water to the Santa Ana River. One of the requirements is a maximum TDS concentration of 650 mg/I in recycled water discharged to the Santa Ana River (Page 14 of the Permit - Section IV. A. 1c.), attached Exhibit A. According to Information provided by Riverside at the November 2023 Technical Advisory Committee meeting of the RAC, the Riverside's regional plants rolling 12-month average TDS concentration is 590 mg/I, which is 9.2% below the 650 mg/I limit.
Although in the aggregate the TDS concentration of the recycled water effluent discharged by Riverside to the Santa Ana River has been and ~ontinues to be below 650 mg/I, Riverside as the Permit holder has raised concerns about Rubidoux's TDS concentration in the wastewater it delivers to the plant for treatment.
The Permit Riverside operates under in Section IV. A. le. provides requirements for TDS compliance. In this section the Regional Board for TDS management purposes established a 650 mg/I TDS limit for effluent discharges based on an expectation of a use Increment of 250 mg/I TDS additive to the source water TDS concentration. This section of the Permit further clarifies "the 12-month flow weighted running average total dissolved solids concentration shall not exceed the 12"month flow weighted running average total dissolved solids concentration in the water supply by more than 250 mg/I, unless the Discharger demonstrates to the satisfaction of the Regional Board's Executive Officer that TDS discharge In excess of the 250 mg/I mineral increment are due solely to chemical additions in the treatment process needed to meet waste 5 discharge requirements, and the Discharger has taken all reasonable steps to optimize chemical additions so as to minimize the TDS Increase."
The Permit in Section IV. A. le. further provides if the excess TDS is due to the quality of water supply utilized ln the Discharger's service area, the Discharger Is to "take all reasonable steps ..... to ensure that the best quality supplies are obtained and utlllzed. 11 The Intent of the TDS
Management Plan Is to demonstrate how Rubidoux has and can take reasonable steps to lower TDS concentration in the wastewater delivered to Riverside. 6 Past TDS Management Efforts by Rubidoux
Below are actions taken by Rubidoux to lower the TDS concentration In wastewater dellvered to Riverside:
Ar,amark Uniform Services Discharge Removed
Aramark Uniform Services ("Aramark") is an Industrial laundry service business located within Rubidoux's service area. The sewer discharged from Aramark ls high In TDS concentration ranging from 1,700 to 2,000 mg/I, with a flow of approximately 230,000 gpd, This flow rate accounted for roughly 10% of Rubldoux's total sewer discharged to Riverside. Due to Its volume of flow and high TDS concentration, Aramark is considered an industrial Discharger and was allowed to discharge into Rubidoux's collection system through Issuance of an Industrial Discharge Permit issued by Rubidoux. However, with Riverside lowering its maximum local TDS concentration limit to 1,210 mg/I, Rubidoux in 2017 began working with A,ramark on a Compliance Plan to meet the lowered TDS concentration limit included in its Industrial Discharge Permit. The original Compliance Plan was to be met by January 15, 2019. Due to a variety of reasons, the compliance schedule was extended to November 1, 2019.
Aramark elected to meet the lowered TDS concentration limit by removing its Industrial strength discharge from Rubidoux's collection system. Near-the Aramark facility is the Inland Empire Brine Line (uBrine Line") owned by the Santa Ana Watershed Authority ("SAWPA"). The Brine Line Is a gravity pipeline that delivers nd-n-reclaimable and salty wastewater from the Santa Ana River watershed upstream of Orange County, CA to a treatment plant in Orange County owned and operated by Orange County Sanitation District, Aramark negotiated for approximately one year with Dairy Farmers of America ("DFA") to purchase DFA's Brine Line capacity It no longer used.
Aramark purchased the DFA Brine Line capacity for approximately $3 million. To facilitate use of the Brine Line capacity, Rubidoux at Its sole cost extended a sewer pipe and converted an existing sewer pipeline to convey the TDS laden industrial sewer flow from Aramark to the Brine Line.
Rubidoux also built a pipeline to convey domestic sewer flow (bathrooms and breakroom 7 facilities) from Aramark to Rubidoux's sewer collection system. The design, bidding and construction of these pipelines cost Rubidoux approximately $425,000, In addition, Rubidoux refunded Aramark approximately $1.9 million in sewer capacity fees representing sewer capacity A~amark it had previously paid to Rubidoux with Its industrial wastewater now diverted to the Brine Line. In all Rubidoux expended $2.35 mllllon to remove this high TDS discharger from Rubldoux's sewer collection system. This was completed In November 2019.
Completion of TDS Study
On April 18, 2019, Rubidoux's Board of Directors authorized an expenditure of $34,000 to hire l<rieger and Stewart to prepare a TDS Study. This study included sampling of distinct areas within Rubidoux to verify concentration of TDS based on area development type. Along with findings, the report Included but was not limited to the following recommendations - 1) Completing the removal of Aramark's industrial waste from Rubidoux's sewer collection system, 2) Potential addition of unused non-potable water into the sewer system which will increase hydraulic loading (more flow) with no increase In TDS from a customer use increment, 3) Investigating water softener use restrictions, 4) Investigating the cost of adding TDS removal treatment on the District's potable water supply, 5) Investigating alternative low TDS water supplies to purchase to blend down the ambient TDS concentration of Rubidoux produced groundwater. A copy of the final report was provided to Riverside. The report was·completed in October 2019 and is attached as Exhibit C.
Plan of Service language for Agua Mansa Commerce Center Rubidoux coordinated with Riverside on additional language In the Plan of Service for the Agua Mansa Commerce Center ("Project") placing a requirement on the Developer of the Project to not discharge sewer in excess of 650 mg/I TDS. This language placed a responslblllty for the Developer to install small treatment facll!ties to remove salt from all potable water to each building. Salts removed from the source water during the reverse osmosis treatment process would be captured in a brine storage tank and truck hauled by the users and discharged to the Brine Line. Due to low potable demand of each building (large box logistics warehousing), the 8 implementation of this language was considered feasible. Riverside removed Its objection to the annexation of the Project into Rubidoux. Subsequent to the Project's annexation Into Rubidoux, Rubidoux and Riverside staff met and Riverside agreed to allow the Project to be bullt without installation of the treatment facilities as proposed in the Plan of Service due to the Project's negliglble contribution to the overall TDS concentration issue. This was addressed in a letter from Rubidoux to Riverside dated December 28, 2020, attached as Exhibit D, and agreed upon by Riverside In January 2021.
Alternative Water Surmlv:
Rubidoux
1 s Board of Directors on March 19, 2020 approved a Memorandum of Understanding ("MOU") between Rubidoux and JCSD. This MOU outlines a cooperative effort between Rubidoux and JCSD to increase water supply in the two service areas. Both agencies discharge sewer to Riverside and have a common Interest in increasing the volume of high quality, low TDS potable water. Currently the two agencies share a physical interagency connection to move water in both directions (Jewel Street lntertie). Goals outlined In the MOU include financially participating in ways to Increase water supply. Possible options to be investigated included:
1. Build a reverse osmosis treatment facility to remove salt and discharge brine to the Brine Line.
2. Move low TDS water from Western to JCSD, and JCSD wheels the water to Rubidoux.
Water
11 wheeling
11 refers to the practice of conveying water from one agency to another agency through a third (intermediary) agency.
3. Evaluate connections to Metropolitan Water District of Southern California 1 s (
11 MWD
11 )
Lower Feeder or Etiwanda Feeder to import low TDS water into Rubidoux.
4. Connection to Rlverside
1 s water distribution system when the Mission Blvd. or Market Street Bridge(s} are rebuilt. Under this option Rubidoux would purchase MIiis Treatment 9 Plant water (low TDS State Water Project) from Western and dellver it to Riverside, and Riverside would deliver like volume of water to Rubidoux. Actual molecules of water would be a composite of Riverside water supplies.
5. Purchase of Chino Desalter Water and deliver through JCSD's distribution system to Rubidoux through the Jewel Street lnterlie (differs from item 11 2
11 above as this desalter
water would be from JCSD's allocation of supply from the Chino Desalter, rather than Western's allocation).
6. Purchase groundwater with low TDS from other local area agencies who are currently not utilizing all of their available water rights.
Update of District Water and Sewer Masterplans
Rubidoux hired Webb and Associates to update its 2015 District Water and Sewer Master Plans.
Rubidoux adopted updated Water and Wastewater Master Plans in October 2022. With the updates, costs were included for water supply/water quality Improvements. The water supply/water quality improvement costs Include costs for the addition of reverse osmosis treatment to remove TDS and contaminants. The updated Master Plans serve as nexus reports for potential Increases in system capacity chc;irges to support nece~sary water supply/wc1ter quality Improvements. A five-year (5) rate plan was adopted by Rubidoux's Board of Directors on . ' December 15, 2022. The rate plan was based on a comprehensive cost of services study which Included a five-year budget outlook and incorporated the purchase of 1,000 AFY of imported low TDS concentration water to use as diluent water with Rubidoux's groundwater.
Summary of Current and Past TDS Management Efforts
The removal of Aramark's high TDS wastewater flow to the Brine Line in November 2019 lowered average TDS concentration from around approximately 1,100 mg/I to 790 mg/I, a 320 mg/I decrease (approximate 30% drop), Rubidoux helped to facilitate this action with a monetary 10 contribution of $2.35 million. This action puts Rubidoux within 140 mg/I of the 650 mg/I TDS limit in its wastewater discharge. To put into terms of pounds of TDS, using an average day discharge of 1.7 MGD wastewater to Riverside, Rubidoux Is approximately 2,000 lbs/dayTDS over the limit.
The updated Rubidoux Water Master Plan has estimated $12 million in capital costs to construct a reverse osmosis treatment plant ('
1 RO") to treat groundwater. Additional costs would be
needed for purchasing Brine Line discharge rights {treatment and disposal, and pipeline), lateral construction from the RO treatment facility to the Brine Line, and a finished water plpellne to connect the desalted water to Rubidoux
1 s distribution system. The RO plant Is anticipated to have a design capacity of 3,100 gpm sufficient to remove enough TDS to bring the TDS levels in the wastewater discharge below 650 mg/I at Rubidoux's currentlyforecasted water demand. The $12 mlllion cost was Included as part of the overall capital costs used to determine the Rubldoux's current water connection fee which is currently set at $6,800 per EDU (1 EDU = ¾ 11 meter
capacity). The water connection fee is updated periodically to match funding requirements proposed in the water master plan as it is updated.
As part of its current plans for future mitigation, Rubidoux conducted thorough analyses of alternative water supplies and the following was determined:
1. Purchase Mills Water Treatment Plant water from Western Municipal Water District. This option has Rubidoux purchasing up to 2,000 AFY of low TDS State Water Project water ("'330 mg/I TDS) and wheeling it through Riverside's distribution system to Rubidoux. The point of entry would be at the west side of either the Market Street or Mission Blvd. •••"• •••••• ••• N•O• ,.,,., •• •• •>O • • ••••••• ••••rn •••• ••• •••• • •••• • •• • ••• •••••' ••••• uo • rn •••• ••- bridge. Preliminary capital costs are In the $8 to $10 million range due to the necessity of building a significant length of pipeline to get from Riverside's transmission mains to Rubldoux's connection point. The option also relies on Riverside agreeing the TDS benefit to Rubidoux would come as a credit. Since the actual molecules of low TDS water purchased would not reach Rubidoux, Riverside would receive the TDS benefit from the 11 purchased water paid for by Rubidoux in lower TDS concentration in Riverside's customer wastewater. The cost of the water would include MWD's Tier 1 Treated plus Western's administrative charges and Riverside's wheeling charges.
2. Purchase of water from Western via JCSD. This option would have Western delivering low TDS water to JCSD from the Mills Water Treatment Plant and/or Arlington and Chino Desalters. This water would have a TDS concentration of around 330 mg/I. JCSD would commingle this water with local groundwater it produces and wheel it to Rubidoux through their distribution system to the Jewel Street lntertie. However, with its existing distribution system, JCSD cannot deliver water to Rubidoux during higher demand periods. Thus, under current conditions JCSD would have limited delivery periods, and the water quality benefit would be degraded as the purchased low TDS water would be blended with local JCSD groundwater which has a higher ambient TDS concentration.
JCSD is constructing in phases a project called the Granite Hill Pipeline. This pipeline is intended to lower pumping costs, increa.se system reliability/redundancy, and enable JCSD to move more Chino Desalter water (low TDS water) into the easterly portion of its service area. Once all phases of the Granite Hill Pipeline are completed, Rubidoux could build approximately a half mile of pipeline to connect the Granite Hill Pipeline to the Jewel Street lntertie. The timing for the completion of all phases of the Granite Hill Pipeline is 8 to 10 yea rs. Once this option is viable the cost of water will be Western's "wholesale water rate", plus JCSD's wheeling charge. Other cost considerations would include amortization of the capital costs to build a pipeline from the end of the Granite Hill Pipeline to the Jewel Street lntertie.
3. Purchase of MWD Water Wheeled through West Valley Water District ("West Valley").
West Valley shares a service area boundary with Rubidoux along Wilson Street near Fleetwood Drive. Both agencies have existing potable water pipelines in Wilson Street, separated by approximately 100 feet. West Valley water is low TDS (330 mg/I) and at a slightly higher pressure.
12 It is estimated Rubidoux would need 21000 AFY of low TDS (330 mg/I) water to create a rolling 12-month TDS average of 650 mg/I in its wastewater deliveries to Riverside at build out condition. Under current customer demands, Rubidoux would only need approximately 900 AFY.
In 2020 Rubidoux staff-Initiated discussions with West Valley staff to explore the possibility of constructing an intertie at the intersection of Wilson and Fleetwood to move water from West Valley to Rubidoux. It was determined the physical lntertie would be relatively inexpensive ($5001000 to $800,000) but the required institutional agreements to memorialize the imported water supply complicated the matter.
West Valley is a retail agency of San Bernardino Valley Municipal Water District ("Valley District
11 ), and Rubidoux is a retail agency of Western. Western is a member agency of MWD. Both MWD and Valley District are "contract agencles 11 to the State of California
Department of Water Resources ("State") for access to State Water Project water. Within the contracts with the State, contracting agencies have a non-compete clause disallowing contract agencies to sell water in each other's service areas. Thus, since Valley District and MWD are both state water contract agencies, to move low TDS imported water (State Water Project Water) It was necessary to negotiate a five-party agreement to enable up to 2,000 AFY of Imported water to be delivered to Rubidoux through West Valley's system.
All parties approved the five-party agreement with MWD ("Five-Party Agreement") being the last to approve It ln spring 2023. The agreement terms Include:
a. Up to 2,000 AFY of MWD water delivered to Rubidoux;
b. Deliveries to Rubidoux will be allocated against Western's MWD supply allocations;
c. The term of the agreement will run concurrent with existing State contracts; 13 d. Rubidoux pays Western for water delivered, Including all associated costs of the water which Western pays on behalf of the District; e. Western pays MWD; and
f. Rubidoux will pay West Valley wheeling charges.
The agreement was fully executed in June 2024.
Rubidoux had their engineering consultant l<rleger and Stewart complete the construction plans and specifications for the physical lntertie to be located at the intersection of Wilson and Fleetwood. Project is "shovel ready
11 and has been reviewed by MWD and West
Valley.
Last, Rubidoux entered into an Operational Agreement with West Valley that was fully executed In October 2024. This Operational Agreement provides day"to"day terms and conditions for the wheeling of water through West Valley. Terms also Include meter access, wheeling costs, and scheduling of delivery requirements.
This option for alternative water supply ls preferred over others analyzed due to:
a. Capital costs: Has lowest capital costs to implement, less than $1,000,000. b. Supply costs: Similar costs for supply to others since supply ls through MWD. Cost will be MWD full service treated plus Western administrative costs and a West Valley wheeling charge. The West Valley wheeling charge is expected to be Indexed as a percentage of the MWD treatment surcharge cost.
c. Readiness: Plans are done and ready to bid, and institutional agreements in place. d. Operational costs: Llttle operational costs except administrative costs to read meter and pay invoices.
e. Low maintenance and replacement costs: Expected costs for meter callbratlon and pressure reducing valve maintenance.
14 f. Ability to implement project as required: The construction of the physical intertie and purchase of water can be based on various triggers as agreed upon by involved agencies. For example, the construction of the lntertie could be conditioned to a future project being annexed to Rubidoux, and water purchases made as Riverside's aggregate TDS concentration in recycle water discharges to the Santa Ana River is in danger of exceeding 650 mg/I.
g, With the intertie in place, there will be flexibility to move either low TDS water acquired from MWD through the Five-Party Agreement, or low TDS groundwater from other local agencies with surplus water rights.
Since 2019 Rubidoux has made significant progress in actual reduction In Its wastewater TDS concentration by moving Aramark TDS laden flow to the Brine Line. It has updated Its master plan to address Improvements In water quality resulting in the inclusion of $12 million for future RO treatment being incorporated into the overall capital budget used to determine the current water connection fee Rubidoux collects for each new EDU. Last, multiple alternative low TDS water supplles have been reviewed and a preferred option selected with agreements and plans in place to implement.
15 Proposed TDS Management Plan
The Issue, TDS management, arises out of concerns voiced by the City of Riverside that at some point In the future, It may not be able to maintain Its current compliance with Riverside's NPDES Permit requirement of recycled water discharge to the Santa Ana River having a TDS concentration at or below 650 mg/I. Currently the TDS concentration of the recycled water discharged to the Santa Ana River is 590 mg/I and is reflective of the aggregate of wastewater flows received by all contracting agencies, Including Rubidoux. Per data provided by Riverside in November 2023, total plant flow Is 26.7 MGD, with Rubidoux contributing 1.7 MGD, or 6.37% of the flow. The total plant TDS discharge Is 131,380 lbs/day based on a total flow of 26.7 MGD with a rolling 12-month TDS concentration of 590 mg/I. Rubidoux with 1.7 MGD of flow at 787 rng/1 TDS, contributes 11,158 lbs/day of TDS, or 8.49% of the plant total. If Rubidoux contributed the same flow of 1.7 MGD with a TDS concentration of 650 mg/I, Rubidoux's TDS contribution would be 9,216 lbs/day. Under current conditions If Rubidoux was to lower its TDS contribution to 650 mg/I (9,216 lbs/day), the overall plant TDS concentration would be lowered to 581 mg/I, a 9 mg/I Improvement from the current discharge average of 590 mg/I {1.5%).
Riverside as the Permit holder has raised concerns about Rubidoux's TDS concentration in the wastewater It delivers to the plant for treatment. Riverside has taken a position where each agency delivering wastewater flow must, on an Individual basis, deliver wastewater with a TDS concentration at or below 650 mg/I.
Rubidoux has made further efforts at its sole expense to reduce Its wastewater TDS concentration from 787 mg/I to be at or below 650 mg/I by Investigating various alternatives to purchase imported low TDS water to blend with its local groundwater supply. The result is a preferred TDS management option of building a physical intertie with West Valley to move either imported MWD water or low TDS groundwater acquired from local agencies. To move this option forward, Rubidoux worked to secure an approved Five-Party Agreement (Exhibit E - Agreement No. A0- 5314: Agreement to Provide Water to Rubidoux Community Services District) to enable access to 16 the MWD supply and has finalized the plans and specifications to build the physical lntertle to West Valley's distribution system. last, Rubidoux executed an Operational Agreement with West Valley to establish day-to-day operational details - meter access, scheduling of deliveries, and payment terms. Ongoing efforts will continue to develop agreements with other local agencies to acquire low TDS groundwater as an option to MWD supply purchases.
Rubidoux proposes the following TDS Management Plan to reduce Its TDS concentration in the wastewater it sends to Riverside's treatment plant -
1. Include a condition in the Plan of Service and Environmental Impact Report for the Rio Vista Project requiring that a physical potable water supply lntertie with West Valley Water District capable of moving up to 2,000 AFY of low TDS concentration water be built.
2. In the event that 750 equivalent dwelling units ("EDU"), defined as¾ inch water meter connection, are connected for sewer service within Rubldoux's current or expanded service area prior to the Rlo Vista Project building the physical lnterlie with West Valley Water District, Rubidoux will cause to build the physical lntertie itself within 12 months of connection of the 750th EDU. The count on the future 750 EDUs will start on the date the • last Party executes this Agreement. See Exhibit F for the analysis and Impact of 750 additional EDUs to Rubidoux's sewage flow to Riverside.
3. Purchase low TDS potable water through the lntertie with West Valley Water District to blend with Rubidoux's groundwater supply in sufficient volumes to enable Rubidoux's TDS concentration In sewage delivered to the Riverside WWTP to be 650 mg/L or less in the event the TDS concentration in tertiary treated water discharged from the Riverside WWTP reaches the following Triggering TDS Concentrations:
I Period
12 Month Average
17 5 Year Average 626
10 Year Average 627
15 Year Average 624
20 Year Average 618
4. These Triggering TDS Concentrations have been determined based on the current NP DES permit TDS compliance calculation and anticipated compliance calculation- of a forthcoming NP DES permit. The Triggering TDS Concentrations may be adjusted to reflect future controlling NP DES permits that may use a compliance calculation different from the current and anticipated compliance calculation utilized herein.
5. In the event of any changes in TDS conditions In sewage delivered to the Riverside WWTP, Rubidoux may request that Riverside reevaluate and/or amend the Triggering TDS Concentrations, which may include discontinuing the purchase of water thro~gh the intertie. Any reevaluation and/or amendment of the Triggering TDS Concentrations requested by Rubidoux, including the discontinuation of water purchases, shall be at the sole discretion of Riverside.
6. If Rubidoux successfully implements groundwater treatment solutions, such as a Reverse Osmosis plant, that eliminates the need for imported water and enables Independent compliance with the NPDES permit, it may discontinue purchasing water through the intertie.
18 EXHIBIT A
California Regional Water Quality Control Board
Santa Ana Region
Order No. RS-2013-0016
NPDES No. CA0105350
Section IV. A. le. (Page 14}
City of Riverside, Department of Public Works
Riverside Regional Water Quality Control Plant
1c . T,otal Oiss0l:i1,ed Solitjs:
·1) Tne 12-month flow weighted run111 ing a v.erage total dissol~ed s01ids constituent conee mtration shall r,iot exceed 6ffiQ mg/I, unless the discharger, ,aemomstrates to the satisfaetion of the R'e@i@mal B0ard's l::xeeuti~e Officer tfiat:
ii, rges in ex - • its are due to the guali~ .ofr water s0urces w rger's service ariea, amd thlat all
nable ste y: E:xeel!Jtive Offiieeli, lilav ra
to ensuri ies afe • di utili• ~==~
Diseliiar£1
ii. Discharges in excess of the TDS limits are due to chemical additions in the treatment process needed to meet waste discharge requirements, and the Discharger has taken all reasonable steps to optimize chemical additions so as to minimize the increases; and
iii. ariger im 'iements a fi!lan with tliie a utive
:ges in e~eess of limit.
2) The 12-month flow weighted running average total dissolved solids concentration shall not exceed the 12-month flow weighted running average total dissolved solids concentration in the water su .ply: by: m(i)r,e than 250 mgfl, unless the Discharger demonstrates to the satisfaction of the Regional Board's Executive Officer that TDS discharge in excess of 250 mg/I mineral increment are due solely to chemical additions in the treatment process needed to meet waste discharge requirements, and the discharger has taken all reasonable steps to optimize chemical additions so as to minimize the TDS increases.
d. Total Inorganic Nitrogen (TIN):
The 12-month flow weighted running average TIN concentration shall not exceed 10 mg/I. unless the Discharger implements a plan, with the approval of the Executive Officer, to offset TIN discharges in excess of the TIN limits. 14 EXHIBIT B
Agreement for Regional Primary and Secondary Wastewater Treatment May 4, 1978
Section 10.2 (Pages 17-18)
... •
9. 2 phanges i~'-"~11t~tx,, S~aadar~~. Th~ E.eg:l.onaJ.
Adviso~y Commtttae may: from t~e to time, amend or o~de~ changes .im. tha • Que.nt::i:t:y S·t:an9a:i:ds set for.tl'.\ in :.&~b:Lbit 11:a,U to the. em:tent neoessaJ:y anci sufficient to p:r:ot:eat the . . . re.g.iot1a1 systern1 and t() oom.1,:ily ·with the requirements of any fGOVe,;nmei1ta:t, e.~enoy having. j urd.aclio.ti<n.1. ov1;1;i: d:tsohatg~s , '
fX"om the r.egional syst·e1;rq provided,, however., th~t: no suoh '
a.,m<:¼t~&iin ti.~ ··•,91l1 •i.r~llat).~~.$ .. w.a;r ... -:tni:m i.4~ /;\\ .. ,o'*' .. A~~;;~_a,JJi!il..,,.tl111l1a.:""~~oci-~ci:-tt·:l:lfo c:a.,·~&tto/ t;t:-g:Jxtt,s ·Qf ... th~,;;J?,(i!;ttite,ts. unleslll the •p.a:rtias ~hall ag:-cee othe.~1.se.,
. t,<P QUM~:;,~¼,, ,SW~A~?,, l~o:a W,Aj!~y1,41J! ... ;t?~Ll;?li;~J?.,?;9. ·, i- , 1111 JN t) ', f..·' I
~q;q~~. :1?,tl;~Mf~l &£1:r? -~lJlPONn~il. WAS,'..t;~WA'£~~- ~.I. 0✓< 'J ,.Ji'W3 I? ~M~TME.~~~ R:4glL+t;e1:~~..... ff. wn'j ,~ .J u ✓ ·-}"
• (>rtJv.tl't,e.
10. l Q~i:i:t'al. _gµgi.~~:S:¥.. ~~~ttda;r;~§ ~ T.ha quality of! wast.ewa:te~ de:tive:i;-.ad by Rive-rside~ _Jurupa and R.ub:td~u:~ i.t~to t:hi;li :c~gional -p:r;:tm~ry a'Q.d. $<ilQo:n:da:ry wastewate,: tra~tmant £aoi,litiel:l $hall. mee.t; .r.eqµ:t:i:emen:ts 'Wi'l\:'h respeot:. to quality, ~hare.ctl;;\l.::L$tics) and p:r:ohih:t;ted, L'lub..stan(H;>S: e:onta:t-m..ed in Exliibit 11 B:. 11
10. 2 ,GAgnga,,s· ~n. 9,1:,t'a.~~t.X S::t;_~l,14!(1.+':~!• The '.Regional • • Advi-i::1ei:ey Cottttriitee~nnay; ft:om· etnte· to ·.tmij; • ·amend :o·t • otder eha:nge.s ~ th~ Quality .Ste.nda1:ds set fo~th in E:8:!lib:!.t :•le, n ·so long a.a thej• are neoessa:x:y and S'l,'.l.fficient: to. pi:o:tect the. '
r.eg:t.ona.l• e.geho.y :havi:ng jud.sdietion over discharges :fxom .... '
• :~-~-\
_;_::,_·
the regional system, or the regional advanced wastewater treatment plant.
Notwithstanding any other provision of this Agreement,
Riverside, Jurupa and Rubidoux sha.11 eac_h have the responsi bility of delivering to the regional pdmacy and secondary t;reatme i;i t facilit i es a q:uahty of wast ~wa.t er which independently cnmplies with all lawful requirements of any regulatory authority of competent jurisdiction. This responsibility shall include measures, if necessary, to improve the respective water supply of any party if the poor quality of its supply causes or threatens violations of any regulatory authority requirement.
11 . ORDINANCES ESTABLISHING RULES AND REGULATIONS
FOR DISCHARGE OF SEWAGE AND INDUSTRIAL WASTES.
11.1 Enactment of Sewer Use Ordinances. Each
party to this Agreement agrees to enact, maintain and enforce a sewer use ordinance which shall prohibit discharge into the regional system of substances which may be hazardous to or may impair t he structures, equi.p·ment, functions or processes thereof, or which would preverit compliance with all lawful requirements affecting the discharge of effluent therefrom. Such ordinances shall also require control of the quantity, rate of flow, and concentration of comp_atible pollutants, of incompatible pollutants, and of toxic substances; and for the issuance of permits to ind us trial users within -18-
EXHIBIT C
Rubidoux Community Services District
Total Dissolved Solids Study
October 2019
RUBIDOUX COMMUNITY SERVICES DISTRICT
3590 RUBIDOUX BLVD., JURUPA VALLEY, CA 92509
(951) 684"7580
RUBIDOUX COMMUNITY SERVICES DISTRICT
TOTAL DISSOLVED SOLIDS STUDY
OCTOBER 2019
Prepared by
KRIEGER & STEWART, INCORPORATED
ENGINEERING CONSULTANTS
3602 UNIVERSITY AVENUE
RIVERSIDE, CALIFORNIA 92501
(951) 684-6900
587•3P19
DFS/ur
587-3Pl9-TDS STUDY
TABLE OF CONTENTS
TABLE OF CONTENTS
Section Page
I. INTRODUCTION ................................................................................................................ ...... 1-1 II. SYSTEM DESCRIPTION ........................................................................................................ 11-1 A. RCSD Service Area ............................................ ............................................................ fl- I B. RCSD Sewer Collection System ............................................ ............................. ... ......... II-I C. City Requirements .................... ................ ........................................................... ........... II- I D. Local Pretreatment Limit ..................... ......... ........... ................... .................................... Il-2 III. SAMPLING PROGRAM ........................................................................................................ 111-1 A. Sampling Locations ............................................ ...................... ................................ ..... Ill- I B. Sample Scheduling ................................................. ....................................................... lll-2 C. Sample Collection , Transportation , and Analysis ....................... ......... ............ .......... .... IIl-3 Table Ill-I Sewer Collection System Sampling Locations
IV. SAMPLING RESULTS ........................................................................................................... IV-1 A. Sewer Collection System Sampling Results ............................................................... ... IV-l B. Potable Water Distribution Sampling Results ................. ............................................ .. TV-I C. Industrial User Sampling Results ......... ........ ..................... ................ ....... ...................... IV-2 D. Lift Station and Outfall Sampling Results ........................................... .......................... IV-3 Table IV-1
Table IV-2
Table JV-3
Sewer System Sampling Results
Water System Sampling Results
Water Supply Sampling Results
V. DISCUSSION ................................................. ............................. ............................................... V-1 A. Potable Water System TDS . ............. ........................... ................................................... V-1 B. Residential Sewer System TDS ................. ............................. ........... ............... .............. V- l C. Residential Areas with Potential for Domestic Stationary Water Softeners ................... V-2 D. Industrial Areas .................................................... .................................... ....................... V-2 E. Results at Regional Lift Station Versus Results at RCSD Outfall .................................. V-2 F. Anticipated Effect of Removal of Aramark's Discharge ................................................ V-3 G. Correlation ofTDS and Specific Conductance .......... ............... ........ ......... .............. ....... V-4 Figure 1
Figure 2
Sewer System Samples - TDS Versus Specific Conductance
Water System Samples - TDS Versus Specific Conductance
VI. CONCLUSIONS AND RECOMMENDATIONS ................................................................. VI-1 A. Conclusions ......... .. ................ ............... ............ ...................... ........................ ........... ..... VI-I B. Recotnmendations ........................................ .................................. ... .................... ........ VI-I
APPENDIX A - MAP OF SEWER SAMPLING LOCATIONS
APPENDIX B - INDUSTRIAL USER SAMPLING RESULTS
APPENDIX C-LIFT STATION AND OUTFALL SAMPLING RESULTS
APPENDIXD-RCSD ORDINANCE N0.105 WATER SOFTENING RESTRICTIONS l .~ KRIEGER&STEWAR T ~ Eng:i11ceri11g Consu1rant s
Table of Contents - i
SECTION I
INTRODUCTION
1 'T'DSStuay
SECTION I
INTRODUCTION
Section '1 - 'lntroduction
The Rubidoux Community Services District (RCSD) is a community services district (CSD), predominantly serving the easterly portion of the City of Jurupa Valley (incorporated July I, 2011) in Riverside County , California, with approximately 120 acres in San Bernardino County . RCSD is located approximately 50 miles east of Los Angeles , and is bounded by San Bernardino County on the north, the Jurupa Mountains and Pedley Hills on the northwest , unincorporated areas of Jurupa on the west , the Santa Ana River on the south , and the City of Riverside (City) on the east. RCS D's current boundaries , which are shown on Figure A-1 in Appendix A, encompass an area of approximately 7.7 square miles.
Ground surface elevations within RCSD's service area range from approximately 760 feet to 1,250 feet above sea level.
Climate in RCSD's service area is characterized by hot, dry summers and short , mild winters , with temperatures commonly exceeding 100 degrees Fahrenheit (°F) during summer months , and decreasing to an average temperature of approximately 49°F during the winter. The area normally receives an average aimual precipitation of approximately 10 inches, most of which occurs during December through March .
RCSD owns and operates a sewer collection system within its service area. Wastewater is collected and transmitted to the City's Regional Water Quality Control Plant (RWQCP) for treatment and discharge to the Santa Ana River.
RCSD's sewer collection system serves approximately 32,900 residents and consists of appro ximately 68 miles of gravity sewers ranging in size from 6 inches to 27 inches in diameter , and six sewage lift stations .
RCSD's service area consists mainly of single family residential customers, but also includes an industrial/manufacturing sector (located mostly in the nottherly portion of the service area), along with commercial/industrial/institutional and landscape connections.
Potable water delivered by RCSD to its customers comes from groundwater, which is cmTently pumped from four active drinking water wells (Wells 2, 6, 8, and 18). All of RCSD's wells are located within the RCSD boundaries and draw from the Riverside South Groundwater Basin. According to its 2018 l ~· C' KRIEGER&S T EWART ~ En g in e erin g Co n s ult.1111s Page I-1
'T1JS Stw£y Section '1 - 'lntroauction
Consumer Conjldence Report, the average total dissolved solids (TDS) of potable water delivered to RCSD's customers is 520 milligrams per liter (mg/L) .
This TDS Study (Study) was prepared to provide a foundation for development of a comprehensive TDS Management Plan that will identify practical methods for managing, and reducing , where possible, discharges ofTDS into the RCSD sewer collection system.
Specifically, the Study sets forth a sampling program that identifies representative sampling locations, adequate sampling and monitoring frequencies and durations, and appropriate sampling procedures ; and provides the results of said program with discussion, conclusions, and recommendations. l ~~ 41" KRIEGER&STEWART 1W Enginccrin:,: Con ~ ultant s
SECTION II
SYSTEM DESCRIPTION
'T'DS Study
A. RCSD SERVICE AREA
SECTION II
SYSTEM DESCRIPTION
Section '1'1 - System 'Descriytion
RCSD's current service area boundaries , which are shown on Figure A-1 in Appendix A, encompass an area of approximately 7.7 square miles.
B. RCSD SEWER COLLECTION SYSTEM
RCSD's sewer collection system serves approximately 32,900 residents and consists of appro ximately 68 miles of gravity sewers ranging in size from 6 inches to 27 inches in diameter, and six sewage lift stations (Fleetwood , Belltown , Exmoor , Jurupa Hills , Juan Diaz, and Regional ). The system serves approximately 5,593 residential service connections and approximately 245 commercial/industrial connections. Sewage is collected and conveyed to the City's RWQCP via the 8.0 million gallons per day (MOD) capacity Regional Lift Station which conveys wastewater to the City via parallel 14" and I 8" diameter force mains. Due to the location of the Regional Lift Station , a supplemental lift station , the 0.6 MGD capacity Juan Diaz Lift Station, collects wastewater from the Jurupa Hills area and pumps it into the 14" and 18" diameter force mains. RCSD contributes approximately 7% of the total wastewater influent flow to the City's RWQCP .
C. CITY REQUIREMENTS
Discharges from the City's RWQCP to the Santa Ana River are regulated by the National Pollutant Discharge Elimination System Permit No. CA0105350 , Order No. R8-2013-0016 (NPDES Permit), issued by the California Regional Water Quality Control Board , Santa Ana Region (Regional Board) . The NPDES Permi t includes two limitations on discharges of TDS ; one fixed and one incremental based on an increase over the TDS of the background water supply . The more stringent of the two limits applies . The fixed limit is 650 mg/L, and the incremental limit is 250 mg/L above the average TDS concentration in the water supply (incremental limit). Both limits are implemented as 12 month nnming averages. In 2016, the City's background domestic water supply TDS concentration was detennined to be 366 mg/L, resulting in a maximum incremental TDS limit of 616 mg/L (366 mg/L + 250 mg/L = 616 mg/L ).
Page l/-1
I 'T''DS Stiufy Section '1'1 - System 'Descriytion
D. LOCAL PRETREATMENT LIMIT
At its City Council meeting on March 20, 2018, the City revised the maximum local wastewater concentration limit (local limit) for TDS in industrial wastewater discharges within the City from 2,500 mg/L to 1,210 mg/L.
Because wastewater discharges to RCS D's POTW are treated at the City's R WQCP, RCSD has historically adopted the same local limits as the City to meet the requirements of the City's NPDES Permit. Therefore , at its Board of Directors meeting on June 7, 2018 , RCSD revised its maximum local wastewater concentration limit for TDS from 2,500 mg/L to 1,210 mg/L to correspond with that of the City , effective as of June 7, 2018.
SECTION III
SAMPLING PROGRAM
T'IJS Stuay
A. SAMPLING LOCATIONS
SECTION III
SAMPLING PROGRAM
Sectwn '1'1'1 - Sam_pfint3 Pro8ram
This sampling program identifies representative sampling locations to effectively characterize domestic and industrial wastewater sources to detennine the allowable TDS loading at the Regional Lift Station.
Sampling locations throughout RCSD's service area have been selected to generally characterize the TDS sources and to identify any areas of concern requiring further attention. Locations were selected based on the existing residential , commercial, and industrial areas within the RCSD service area, in an effort to fully characterize the TDS distribution within the sewer collection system.
1. Sewer Collection System
The sewer collection system sampling locations are identified by address and manhole number or lift station name in Table 111-1 at the end of this section. In addition to TDS , samples collected from these manholes were analyzed for Total Hardness, Calcium, Magnesium, Sodium, and Specific Conductance (an estimate of TDS that can be measured electronically in the field with a hand-held device or continuously using a fixed electronic sensor). A11alyses for Total Hardness , Calcium , Magnesium , and Sodium were included to help identify potential sources ofTDS discharges (e.g., water softeners).
2. Potable Water Distribution System
Although the average TDS of potable water delivered to RCSD's customers is 520 mg/L (according to the 2018 Consumer Confidence Report) , the TDS can vary between pressure zones within the RCSD service area due to differences in water quality provided by the various RCSD groundwater wells . To establish baseline TDS values in the potable water contributing to the TDS in the local sewage flows for comparison to the sewer collection system samples , samples were collected from selected distribution system sample taps located in the vicinity of the sewer sampling locations (see Table IB-1). In l ~. :a.!' KR.IEGER&STEWAR.T ~ E nginecrin i; Cousult:lnt s Page lll-1
Section '1'1'1 - Samyfirl(J ProBram
addition to TDS , these samples were analyzed for Total Hardness, Calcium , Magnesium , Sodium , and Specific Conductance.
To establish baseline TDS values in the potable water supply for major pressure zones within RCSD's service area (except the small Ridgeline/Skyloft Pressure Zone), samples were also collected at four of RCSD's domestic water storage reservoirs (Tom Watson, Atkinson, Perrone, and Hunter #2) at the Anita B. Smith Wellhead Treatment Facility , and analyzed for TDS and Specific Conductance.
3. Significant Industrial Users
Routine wastewater monitoring at Aramark Uniform Supply and Sierra Aluminum includes monitoring for TDS.
B. SAMPLE SCHEDULING
Sampling was scheduled to accommodate RCSD staff working hours and schedules as well as to minimize overall costs, while still obtaining sufficient representative data to obtain meaningful conclusions .
Sewer Collection System manholes specified in Table 111-1 were divided into three groups and sampled on three successive days , Wednesday , Thursday , and Friday. Sampling was repeated approximately two weeks later to account for sho11-term variability in sewage TDS.
Potable water system sampling locations specified in Table ill-1 were sampled once on three successive days: Tuesday, Wednesday and Thursday .
Samples were not collected on weekends because a review of continuous Specific Conductance monitoring records from the Juan Diaz and Regional Lift Stations did not indicate any significant difference between weekday and weekend results.
l .. ~ KRIEGER & STEWART 1W' Enginccrintt Consultant s
Page III-2
I 'T'DS Stwfy Section '1'1'1 - SamyCine Pro8ram
C. SAMPLE COLLECTION, TRANSPORTATION, AND ANALYSIS
All samples collected from sewer collection system manholes were 24-hour composite samples.
Each sample was collected by E.S. Babcock & Sons Laboratory (ESB) staff and transported to the laboratory in laboratory-provided sample containers cooled to S 4°C. ESB is a state-certified analytical laboratory . Samples were analyzed in accordance with standard protocols .
All samples collected from potable water distribution system sampling locations were grab samples collected by RCSD personnel and transported to the ESB laboratory in laboratory-provided sample containers cooled to S 4°C.
l ~ C' KR.IEGER&STEWART ~ Enginccri11g Co n s ultant s
Page ll/-3
TABLE 111-1
SEWER COLLECTION SYSTEM SAMPLING LOCATIONS
~ - --
Selllo'er System Samplinci Water System Sampling
Sampling Sample Selllo'er Atlas Manhole No./ Sample
Group Point Manhole/LS. Location Page No. Deve lopment/Area L.S. Name Sample Type Site No. Site Location Type Residential Areas
1 6307 Cross River M2 Jurupa Hills 0052-006 24-Hour Composite 21 7480 Cascade Grab 2 5971 Ave. Juan Bautista L3 Jurupa Hills 0100-026 24-Hour Composite 2 5956 Ave. Juan Bautista Grab 1 3 5622 Via Escalante J2 Hunter 0108-146 24-Hour Composite 12 5580 Via Escalante Grab 4 6464Asa 13 Van Daele 0254-086 24-Hour Composite 4 6536Asa Grab 5 6541 Raven G3 Van Daele 1050-024 24-Hour Composite 17 6728 Raven Grab 6 3347 LaRue G5 Paramount 1302-004 24-Hour Composite 18 3176 Ruthann Grab 7 5679 Newton F6 North Rubidoux 1252-074 24-Hour Composite 19 5617 Bella Grab 2 8 5774 De La Vista 15 Central Rubidoux 0650-004 24-Hour Composite 3 5779 De La Vista Grab 9 4016 Twining 16 Central Rubidoux 1450-004 24-Hour Composite 15 4051 Twining Grab 10 4305 Exmoor K6 Lorinq 0202-004 24-Hour Composite 7 4440 Palamina Grab Commercial Areas
11 1690 Rubidoux Blvd. D7 Crestmore 2300-022 24-Hour Composite - Tom Watson ReseNoir 11> Grab 3 12 Via Cerro . iust cast Market F8 Butler Industrial Park 2150-008 24-Hour Compos ite 30 2245 Via Cerro Grab 13 2993 Rubidoux Blvd. G6 Riverside Business Park 1252-096 24-Hour Compos ite 19 5617 Bella Grab 14 3865 Rubidoux Blvd. 15 Mission Business District 0000-298 24-Hour Comoosite 26 3969 Leioh Grab Lift Stations
- Juruoa Hills Countrv Club L3 - Juan Diaz L.S. Continuous EC - - - - Rio Road L4 - Regional L.S. Continuous EC - - -
(1) Total water supply for Sample Site 11 is provided by West Valley Water District.
SECTION IV
SAMPLING RESULTS
@ 'PJJs study Section '1V - Samylirtt3 'Resufrs
SECTION IV
SAMPLING RESULTS
A. SEWER COLLECTION SYSTEM SAMPLING RESULTS
Results of the sewer collection system sampling are set fotth in Table IV-1 at the end of this section.
B. POT ABLE WATER DISTRIBUTION SYSTEM SAMPLING RESULTS
Results of the water system sampling are set forth in Table IV-2 at the end of this section . The average of the potable water system TDS samples , including the reservoir sampling , was 521 .7 mg/L.
Samples were also collected at each of RCSD's domestic water storage reservoirs , with results as follows:
Reser\'oirs
Sam()lcd May 23, 2019
TDS EC TDS/
Reservoir Pressure Zone (mg/L) (uS/cm) EC Ratio
Watson Atkinson North of CA-60 560 810 0.691
Atkinson Atkinson South ofCA-60 500 800 0.625
Perrone Hunter North of Ave. de Palma 500 810 0.617
Hunter #2 Hunter South of Ave. de Palma 510 800 0.638
Samples were also collected at the Anita B Smith Water Treatment Facility and at Wells 2 and 8, with results as follows (including results for Well 18 collected in 2018-Well 18 has not yet been sampled in 20 I 9):
Anita B. Smith Wellhead Treatment Facility
Sampled May 22, 2019
I TDS EC TDS/
Location (mg/L) (uS/cm) EC Ratio
Well 6 470 770 0.610
Blended Effluent 510 790 0.646
Page IV-1
Section 'JV - Sam_plifl(J 'R.esufrs
The average TDS of the source samples was 495 mg/L. For the Anita B. Smith results, the blended effluent is the water that is discharged into the system; water from Well 6 is subjected to ion exchange treatment for nitrate removal prior to discharge. Therefore, the Well 6 results were not included in the data analysis.
C. INDUSTRIAL USER SAMPLING RESULTS
Routine sampling is conducted at the effluent sampling points of two industrial users in RCSD's service area: Aramark Uniform Services (Aramark, an industrial laundry located at 1135 Hall Ave. in the Agua Mansa Corridor) and Sierra Aluminum (an aluminum fonning company located at 2345 Fleetwood Dr. in the Butler Industrial Park). Aramark and RCSD both sample Aramark's effluent on a weekly basis. Results of Aramark sampling for May through July 2019 are shown in Table B-1 in Appendix B. Sierra Aluminum samples its effluent twice mmually and RCSD samples it roughly every other week. Results of Sierra Aluminum sampling for May through July 2019 are shown in Table B-2 in Appendix B.
For the sampling period , Aramark's flow-weighted average TDS was 1,591 mg/L, and its average discharge flow was 311 ,619 gallons per day (gpd) . For the sampling period, Aramark discharged an average of approximately 4,137 pounds/day of TDS to the RCSD collection system. Aramark is located in an area where potable water is supplied by West Valley Water District (WVWD).
According to WVWD's 2018 Consumer Confidence Report, the TDS of the potable water service supplying Aramark was approximately 231 mg/L. Aramark added a TDS increment of approximately 1,360 mg/L of TDS to the water; equivalent to approximately 3,536 pounds/day of TDS .
For the sampling period, Sierra Aluminum's flow-weighted average TDS was 1,042 mg/L, and its average discharge flow was 22,538 gpd. For the sampling period, Sierra Aluminum discharged an average of approximately 196 pounds/day of TDS to the RCSD collection system. For the sampling period, the TDS of the potable water service supplying Sierra Aluminum (collected at the tap) was 582 mg/L, which is 61 mg/L higher than the average potable water TDS measured during the sampling period. Sierra Aluminum added a TDS increment of approximately 460 mg/L ofTDS to the water; equivalent to approximately 86 pounds/day ofTDS.
Page JV-2
Section 'lV - Sam_pfine 'Resufrs
D. LIFT STATION AND OUTFALL SAMPLING RESULTS
TDS sampling results for the Regional and Juan Diaz Lift Stations from January through July 2019 are shown in Appendix C. For the sampling period , average outfall flow at the Regional Lift Station was 1.892 MGD, and flow-weighted average TDS was 1,132 mg/L , equivalent to approximately 17,872 pounds/day of TDS. Average outfall flow at the Juan Diaz Lift Station was 0. 134 MGD, and flow-weighted average TDS was 709 mg/L equivalent to appro ximately 793 pounds/day ofTDS.
The City monitors flow , TDS , and conductivity of the wastewater from RCSD's 14" and 18" diameter force mains (RCSD outfall) as they enter the RWQCP's headworks. Sampling results for the RCSD outfall from January through July 2019 are shown in Table C-3 in Appendix C.
For the sampling period , average outfall flow was 2.0 MGD , and flow-weighted average TDS was 903 mg/L , equivalent to approximately 15,071 pounds/day of TDS .
PagelV-3
TABLE IV-1
SEWER SYSTEM SAMPLING RESULTS
ROUND 1
San'!'I• Sewar Atlas Dovolopmont S•n'!'I• Hardnoss Calcium Magnoslum Sodium SC TDS Point Manholo No. Location Paae No. OevoloDmant/Araa Two D.1to 1-/LI l=/Ll Imo/LI l=/LI lurmos/cml tma/Ll 1 0052-006 6307 Cross River M2 Juruoa Hills Residential 06/26/19 270 85 14 92 1,200 710 2 0100-026 5971 Ave. Juan Bautista L3 Juruoa Hills Residential 06/26/19 210 67 11 98 1,300 750 3 0108-146 5622 Via Escalante J2 Hunter Residential 06/27/19 280 87 15 110 1,300 800 4 0254-086 6464 Asa 13 Van Daele Residential 06/26/19 270 85 14 83 1,200 730 5 1050-024 6541 Raven G3 Van Daele Residential 06/27/19 300 94 16 110 1,iOO 850 8 1302-004 3347 LaRue GS Paramount Resldential 06/27/19 320 100 17 100 1,400 800 7 1252-074 5679 Newton F6 North Rubidoux Residential 06/27/19 320 100 17 68 1,300 710 8 0650-004 5TT4 De La Vista 15 Central Rubidoux Residential 06/28/19 280 90 14 78 1,100 650 9 1450-004 4016 Twinlno i; Canlral Rubidoux Residential 06/28/19 320 100 17 100 1,500 800 10 0202-004 4305 Exmoor KS Lorina Residenlial 06/28/19 360 110 18 110 1,600 770 11 2300-022 1690 Rubidoux Blvd. D7 Cres1more Industrial 07/03/19 230 72 11 25 540 350 12 2150-008 Via Cerro, lust oast Markel F8 Butler ,idustrial Park Industrial 06/28/19 590 180 32 110 1,700 1,200 13 1252-096 2993 Rubidoux Blvd. GS Riverside Business Park Industrial 06128/19 450 140 24 73 1,500 780 14 0000-298 3865 Rubidoux Blvd. 15 Mssion Business Dislrict Commercial 06/28/19 340 110 17 120 1,600 800 TABLEIV•1
SEWER SYSTEM SAMPLING RESULTS
ROUND 2
San'!'I• Sewer Atlas Oevolopmont San'!'la Hardness Calcium Magno slum Sodium SC TDS Point Manhole No. Location Paae No. Oevoloament/Area Two Dato Ima/LI lma/L) lma/L\ lma/L\ turmos/cml /ma/LI 1 0052-006 6307 Cross River M2 Juruoa Hils Residenlial 07/10/19 280 88 14 84 1,300 660 2 0100-026 5971 Ave. Juan Bautista L3 Juruoa Hals Residential 07/10/19 380 120 20 190 2,200 1,200 3 0108-146 5622 Via Escalante J2 Hunter Residential 07/10/19 380 120 21 190 1,900 1,100 4 0254-086 6464 Asa 13 Van Daele Residenllal 07/10/19 280 86 15 78 1.100 730 5 1050-024 6541 Raven G3 Van Daele Residential 07/10/19 370 120 0 91 1,500 830 6 1302-004 3347 LaRue G5 Paramount ResidenUal 07/11/19 340 110 18 72 1.300 750 7 1252-074 5679 Newton F6 North Rubidoux Residential 07/11/19 320 97 18 66 1.200 670 8 0650-004 5774 De La ViSla 15 Cenlral Rubidoux Residential 07112/19 260 81 14 100 1,600 910 9 1450-004 4016 Tv.inina IS Central Rubidoux Resldenllal 07/11/19 330 100 17 98 1,600 630 10 0202-004 4305 Exmoor K6 Lorino Residential 07/11/19 270 86 14 120 1.400 760 11 2300-022 1690 Rubidoux Blvd. D7 Crestmore Industrial 07/12/19 200 64 10 19 500 350 12 2150-008 Via Cerro, lust past Markel F8 Buller ,iduslrial Park Industrial 07/12/19 480 150 27 120 1,600 1,300 13 1252-096 2994 Rubidoux Blvd. G6 Riverside Business Park Industrial 07/12/19 410 130 22 86 1,600 1,100 14 0000-298 3865 Rubidoux Blvd. 15 Mssion Business District Commercial 07/12/19 300 94 16 110 1,500 830 Pu;.:e I V-I
Cit T.DSStuay
TJ\BLE IV-2
WATER SYSTEM SAMPLING RESULTS
Salll>le Se'M r Pllas Development Salll>I• Hardness Calcium Magnesium Sodium SC TDS Point Location Paae No. Oevelooment/Area Reserv oir T•- Date lmn/L) lmn n I lmn/LI lmn/LI furmo s/cml tmn/Ll 1 7480 Cascade L2 Jun.ma Hills Atkinson Residential 06/25/19 280 89 13 61 800 510 2 5956 Ave. Juan Bautista L3 Jun.no HIils Atklnson Residential 06/25/19 280 90 13 58 790 510 3 5580 Via Escalante J2 Hunter Hunter Residential 06/25/19 280 89 13 57 810 520 4 6536 Asa 13 Van Daele Atkinson Residential 06/25/19 280 89 13 60 810 51 0 5 6728 Raven G3 Van Oaele Perrone Residen lial 06125/19 270 89 13 59 800 510 6 3176 Rulhann GS Paramount Atkinson Resldentlal 06/26119 310 97 15 so 820 520 7 5617 Bella F6 North Rubidoux Watson Residential 06/26/19 330 110 17 39 800 550 8 Sn9 De La Vista 15 Central Rubidoux Atkinson Residential 06/26119 280 89 13 62 800 500 9 4051 Twlnina 16 Central Rubidoux Atkinson Residential 06/26119 280 88 13 62 800 500 10 4440 Palamina KS Lorinq Atkinson Residential 06/26/19 280 91 13 60 800 500 11 Tom Watson Reservoir D7 Crestmore Watson Industrial 06127/19 330 100 17 39 840 540 12 2245 Via Cerro FB Butler Industrial Park Watson Industrial 06/27/ 19 330 100 17 39 850 580 13 5617 Bella FS Riverside Business Park Watson Industrial 06127/19 320 100 16 43 840 550 14 3969 Leioh 15 Mssion Business District Atkinson Commercial 06/27/ 19 2 80 88 14 62 810 520 R1 Alkinson Reservoir GS/GS - - 05/23/19 - - - - 800 500 R2 Watson Reservoir D7 - - 05/23/19 - - - - 810 560
R3 Perrone Reservoir H3 - - 05/23/ 19 - - - - 81 0 500
R4 Hunter Reservoir J2 - - 05/23/19 - - - - BOO 510
T.ABLE IV-3
WATER SUPPLY SAMPLING RESULTS
SoYR:r Aalas Salll' le Hardness Calcium Magnesium Sodium SC TDS Source Identification Paoa No. Reservoir Date fmn/L ) fmn/LJ lmn/LI '-'LI lurmos/cml •-IL\ Well2 H6 AWnson 08107/19 280 94 12 47 n o 500
Well8A 17 Atkinson 08/07/19 250 80 13 67 810 480
W ell18 H7 Atkinson 08116/18 240 75 12 73 800 490
Nitrate Plant - Well 6 E9 Watson 05122/19 - - - - no 470 Nilrate Plant- Blended Water E9 Watson 05122/19 - - 790 510 11'11t'.- KRI EGER&STEWART 1W' E11 ;:i11ci.,rin1,: C 1111<•11l1:i 111 ~
SECTIONV
DISCUSSION
'T'DS Study
SECTION V
DISCUSSION
A. POT ABLE WATER SYSTEM TDS
Section V - 'Discussion
The average of the potable water system TDS samples, including the reservoirs, was 521. 7 mg/L.
The average of the water source TDS samples (wells and Anita B. Smith facility) was 495 mg/L.
The average of the two TDS samples collected from the Watson Reservoir was 550 mg/L, 50 mg/L higher than samples collected from the Atkinson and Perrone Reservoirs, and 40 mg/L higher than the sample collected from the Hunter #2 Reservoir. Samples from sample points served by the Watson Reservoir (Sample points 7, l2, and 13) were, on average, approximately 39 mg/L higher than the average; and were the only sites with TDS levels that exceeded the 521.7 mg/L average by more than 5 mg/L.
The Butler Industrial Park had unusually high TDS in its potable water supply; higher than the sample collected from the Watson Reservoir (560 mg/L) . Sampling of the blended effluent at the Anita B. Smith Plant (located adjacent to the Butler Industrial Park) on May 22 indicated a TDS of 5 l 0 mg/L; but the potable water sampled at 2245 Via Cerro on June 27 had a TDS of 580 mg/L, and the potable water supply sampled at Sierra Aluminum had an average TDS of 582 mg/L (over the period May through July 2019).
The average TDS of the water source samples was 495 mg/L, considerably lower than the TDS of the water in the Watson Reservoir.
The source of the high TDS in the potable water in the Watson Reservoir and c01mections in the northerly Atkinson Zone should be investigated further.
B. RESIDENTIAL SEWER SYSTEM TDS
The average residential TDS for all wastewater samples was 801.5 mg/L. The average residential TDS increment added to potable water TDS for all wastewater samples was 288.5 mg/L. l~ ...! KRIEGER&STEWART ~ Engineering Con s 11lta111s
Page V-1
'T'lJS Stuay Section V - 'Discussion
C. RESIDENTIAL AREAS WITH POTENTIAL FOR DOMESTIC STATIONARY WATER
SOFTENERS
The residential sample stations where wastewater and potable sample results indicated a TDS increment greater than the average of288.5 mg/L were Stations 2, 3, 5, (both rounds of sampling) , 8, and 9. These sample stations are located in the Jurupa Hills, Hunter Zone, Van Daele Development , and Central Rubidoux areas. There is increased potential for domestic stationary water softeners in these areas.
RCSD's Ordinance No . I 05 limits the use of stationary water softeners by all users of the RCSD wastewater collection system (See Appendix D). The use of residential domestic stationary water softeners is allowed, but is conditioned by a number of special requirements.
D. INDUSTRIAL AREAS
Butler Industrial Park had the largest added TDS increment (620 mg/L for first round of sampling , 720 mg/L for second round of sampling). The area includes Sierra Aluminum and other businesses that have cooling towers , which increase TDS tlu-ough evaporation.
The samples from Sample Station 11 (in an industrial area) had much lower TDS values than other RCSD wastewater samples . This station is in an area where potable water is supplied by WVWD . According to its 2018 Consumer Confidence Report, the average TDS , Hardness, and Sodium for water produced by WVWD wells was 231 mg/L, 177 mg/L, and 16 mg/L, respectively; all significantly lower than the values for the same constituents in the water produced by RCSD's wells .
E. RESULTS AT REGIONAL LIFT STATION VERSUS RESULTS AT RCSD OUTFALL The data set fcJlth in Appendix C indicate a substantial variance in the TDS of samples collected by RCSD at the Regional Lift Station and by the City at the RCSD outfall. According to RCSD staff, RCSD's composite sampling performed at the Regional Lift Station's wet well have also resulted in BOD and TSS values at significant variance from those provided by the City based on sampling at the RCSD outfall. RCSD has obtained split samples from the City, and the split l .. ~ KRIEGER & STEWART iw, E n g in ee rin g Co ns ultant s Page V-2
Section V - 'Discussion
samples correlate well with the City's results. RCSD has recently ceased collecting samples at the Regional Lift Station.
F. ANTICIPATED EFFECT OF REMOVAL OF ARA MARK'S DISCHARGE The average TDS of Aramark's wastewater discharge constitutes upwards of 27% of the total TDS delivered by RCSD to the RWQCP in pounds/day. Due to its inability to comply with RCSD's lndustrial Wastewater Pretreatment Local Limit for TDS, Aramark has been required to terminate its discharge to RCS D's sewer collection system by November 1, 2019 ( contingent upon timely approval of the final discharge pennit by Orange County Sanitation District) .
The anticipated effect of the removal of Aramark's wastewater discharge from RCSD's collection system on outfall TDS was estimated two different ways, as follows:
I. Based on the sampling data and methodology set forth in Table B-3 of Appendix B for May through July 2019 (samples collected on the same date only), the theoretical effect ofremoving Aramark's discharge from the collection system on TDS at the RCSD outfall is a reduction of approximately 117 mg/L (about 13%) from 906 mg/L to 789 mg/L.
2. Based on the overall mass discharge of TDS in pounds/day for the entire sampling period, the TDS at the Outfall of 15,071 pounds/day would be reduced by 4,137 pounds/day to 10,934 pounds/day , and the flow would be reduced from 2.0 MGD by 0.31 MGD to 1.69 MGD. This would yield an outfall TDS concentration of 775 mg/L.
The above results represent substantial reductions, but would not be sufficient to reduce RCSD's discharge to the City's RWQCP to levels that match the City's NPDES discharge limits. The calculated discharge TDS concentrations with Aramark removed from the system would still exceed the City's 650 mg/L TDS NPDES discharge limit by 125 to 139 mg/L, and the City's incremental NPDES TDS discharge limit by approximately l 59 to 173 mg/L.
Note: Due to questions that have arisen regarding the TDS values in samples collected to date at the Regional Lift Station, the effect of removing Aramark's discharge from the collection system on TDS at the Regional Lift Station is not considered herein. l ~ KRIEGER&STEWART ~~ Engineering Cunsul1~tn, s
Page V-3
'T'lJS Study Section V - 'Discussion
G. CORRELATION OF TDS AND SPECIFIC CONDUCTANCE
Plots of TDS versus Specific Conductance for potable water samples and sewage samples are presented in Figures 1 and 2 at the end of this section, along with linear trend lines and their equations. These plots can be used in the field to estimate TDS from Specific Conductance readings.
l ~ KRIEGER&STEWART ~ En~i_11cc ri111,; Co11sult:111t s Page V-4
@ 'T'DS sru,{y Section V - 'Discussion
Figure 1
Sewer System Samples
TDS Versus Specific Conductance
1400
y = 0.5353x + 61.943 9
1200
...,j 1000
-
bl)
E 800
v'l'
0 I- 600
400
200
0 500 1000 1500 2000 2500
Specific Conductance, umhos/cm
Figure 2
Water System Samples
TDS Versus Specific Conductance
600
y = 0.964x- 261.84 ♦
550
...,j
-
bl)
E 500 -+---<O -
(I)'
0 ♦
I-
450
400
760 780 800 820 840 860
Specific Conductance, umhos/cm
l ~ ia!' KRIEGER&STEWART ~ Engineering- Co1 1s11 l1 :u1 t s:
Page V-5
SECTIONVI
CONCLUSIONS AND
RECOMMENDATIONS .
Section V'J - Conc{usions and 'Recommendations
SECTION VI
CONCLUSIONS AND RECOMMEND A TIO NS
A. CONCLUSIONS
• The TDS of potable water in the Watson Reservoir is significantly higher than the water in the other RCSD reservoirs , and is higher than the TDS in supply water samples from RCSD wells and the Anita B. Smith Water Treatment Facility would justify. • There is significant potential for the existence of domestic stationary water softeners in certain residential areas of RCSD, pa1ticularly the Jurupa Hills, Hunter Zone, Van Daele Development , and Central Rubidoux areas.
• The average TDS concentration in RCSD's potable water system is approximately 520 mg/L , which increases RCSD's TDS discharge to the City's RWQCP. • The contribution of Aramark's wastewater discharge to the TDS of RCSD's wastewater outflow is significant , but removal of Aramark's discharge to the RCSD collection system is not likely to be sufficient to bring RCSD's TDS discharge into full compliance with the City's NPDES TDS discharge requirements.
B. RECOMMENDATIONS
The following recommendations may form the basis of a TDS mitigation strategy , which should be developed as a separate document.
• Perform additional monitoring in trunk sewers, the Regional Lift Station, and the RCSD outfall after Aramark's discharge has been removed from the collection system. • Investigate the source of high TDS water in the Watson Reservoir. • Investigate current implementation of the provisions of RCSD Ordinance No. I 05 regarding stationary water softeners (see Appendix D), and additional methods such as educational programs , to control water softener installation and use.
KRIEGER &STEWART
Engineerin g Cuu :; ultant s
Page VI-1
I 'T1JS Study Section V1 - Condusions and 'Recommenaations • Work with Aramark to facilitate discontinuation of their wastewater discharge to the RCSD sewer collection system according to schedule.
• Review industrial user cooling tower discharges and operational settings 111 upcoming pretreatment program inspections.
• RCSD has a permanent emergency intertie with Jurupa Community Services District (JCSD) , which has water with relatively low TDS concentrations. Investigate purchasing additional water from JCSD for blending with RCSD's existing water sources. • Investigate establishing a permanent intertie with WVWD , which has water with relatively low TDS concentrations , for purchasing water from WVWD for blending with RCSD's existing water sources.
• JCSD obtains a portion of its domestic supply from the Chino Desalter Authority (CDA).
Investigate the possibility of purchasing CDA water ; perhaps via the JCSD intertie. • Investigate alternative technologies and operational strategies for reducing source water TDS concentrations.
• Investigate reducing wastewater TDS by discharging approximately 0.58 MGD of nonpotable water from Well 14 (46th Street) into RCSD's trunk sewer , at a TDS of roughly 495 mg/L.
Assuming TDS at the Outfall of I 0,934 pounds/day (after the Aramark discharge has been removed from the collection system) , adding this nonpotable discharge would increase the TDS at the Outfall to about 13,330 pounds/day , and the flow from 1.69 MGD to 2.27 MGD .
This would reduce the outfall TDS concentration by about 71 mg/L to about 704 mg/L. Note that this tactic would become less workable over time, as the unused sewer capacity necessary to implement this tactic will be gradually reduced to accommodate increasing sewer discharges from new development.
l ~ ~ KRIEGER&STEWAR T ~ En g ine e rin g Con s ultant s Page V/-2
APPENDIX A
MAP OF SEWER SAMPLING LOCATIONS
RUBIDOUX COMMUNITY SERVICES DISTRICT
Grid Index
A1 A2 A3 A4 A5 r---A6 A7
I
I
B1 B2 B3 B4 sy -i - ser
I I-- - --i - •
/ c5 I
C1 C2 C3 C61
Sample Point 7 1
0 1 0 2 03 I
Sample Point 6
E1 E2 I E3
F1 F2
I
11 J 1
K1
Sample Polnl 2
M4 M5
N3 N4 N5 N6 N7
AB A10
B1 0
C10
010
9 9 E10
t...:::.-,,,IF- ---, Sierra Aluminum
H8
F10
Sample Point 12
G10
H9 H10
Sample Point 13
18 19 110
JS Jg J10
KB K9 K10
LB L9 L10
MB M9 M10
NB N9 N10
Legend
mJ LiFtStalion
Collector
ForceMai ns
lnvertedSiph on
S.A.RJ. Pipeline
Trunk
L-:J District Boundary (Current)
L-_-J District Bound ary (Future)
D Grid Boundary
SHEETS
N
il
~ [!
REVISIONS
SEWER ATI.AS BOOK CREATED
COVER SHEET. GRID INDEX SHEET. 09 ,
C9. E9. FJ, G.:. GG, HJ, HS. H6. 15, 16, JJ .
K2, K4-A. LJ, LJ. ~13
COVERSHEET , GRID INDE.'C SHEET, BO ,
BY. C7 , C9, 06, 07. 09. EG. E7, E9, FS. F6.
G5, GU, H7, 13, 15. IT, JJ, JS, KJ, K~
September 2015
DATE
OG-2009
10-2012
9--2015
FIGURE A-1
Map of Sewe r Sampling Locations
APPENDIXB
INDUSTRIAL USER SAMPLING RESULTS
TABLE B-1
ARAMARK SAMPLING RESULTS
Wastewater
Sample TDS Discharge Flow
Date (mg/L) (gal/day)
5/1/2019 1,300 * 314,855
5/8/2019 1,600 * 312,231
5/15/2019 1,400 * 309,347
5/21/2019 1,400 • 308,531
5/29/2019 1,700 * 323,191
6/4/2019 1,100 325,482
6/12/2019 1,300 * 315,441
6/20/2019 1,800 * 294,090
6/27/2019 1,800 • 311,612
7/10/2019 2,000 • 325,983
7/16/2019 1,600 * 279,731
7/23/2019 1,900 * 297,283
7/30/2019 1,800 * 333,270
Avg 1,591 •• 311,619
• Exceeds the local daily maximum wastewater concentration limit of 1,21 O mg/L.
•• Flow-Weighted Average
587-3P19-TDS&Condctvty .xlsxTbl B-1 -Aramark
(11/1/2019) Page 1 of 1
TABLE 8-2
SIERRA ALUMINUM SAMPLING RESULTS
TDS Wastewater Specific Conductance
Sample Wastewate r Tap Water Discharge Flow Wastewater
Date (mg/L) (mg/L) (gal/day) (µmhos/cm)
5/7/2019 1,208 -- 24,000 --
5/8/2019 1,200 530 24,000 1,600
5/21/2019 1,100 500 16,140 1,400
. 6/6/2019 1,300 600 24,000 1,500
.
6/20/2019 1,300 680 21 ,690 1,500
* 7/10/2019 1,300 610 21 ,370 1,500
7/12/2019 1,204 -- 24,810 1,760
7/25/2019 1,000 570 24,290 1,300
Avg 1,042 ** 582 22,538 1,509
* Exceeds the local daily maximum wastewater concentration limit of 1,21 O mg/L. ** Flow-Weighted Average
587-3P19-TDS&Condctvty .xlsxTbl B-2 - Sierra Aluminum
(11/1/2019) 1 of 1
Tap Water
(µmhos/cm)
--
810
800
820
840
790
--
760
803
TABLE B-3
ESTIMATION OF RCSD DISCHARGE TDS WITHOUT ARAMARK CONTRIBUTION I
Wastewater : Wastewater Wastewater
Sample TDS Discharge Flow TDS Discharge Flow TDS Discharge Flow Date (mg/L) (gal/day) (mg/L) (MGD) (mg/L) (MGD)
5/1/2019 1,300 0.31 970 2.00 890 1.96
5/8/2019 1,600 0.31 890 1.96 960 1.81
5/15/2019 1,400 0.31 1,000 1.96 900 1.86
5/21/2019 1,400 0.31 860 1.96 870 1.83
5/29/2019 1,700 0.32 820 1.97 950 1.87
6/4/2019 1,100 0.33 810 1.97 980 1.82
6/12/2019 1,300 0.32 990 1.97 1,000 2.08
7/10/2019 2,000 0.33 980 1.97 1,200 1.84
7/16/2019 1,600 0.28 850 1.96 2,800 1.84
7/30/2019 1,800 0.33 890 2.03 3,700 1.89
Total - 3.15 - 19.75 -- 18.80
(Flow Wtd) Avg 1,522 0.31 906 1.98 1,422 1.88
TDS without Aramark Discharge 789 1,402
Difference 117 20
Note: Only samples collected on the same date were counted. Samples for Aramark were not counted if samples for both the outfall and Regional Interceptor were not collected on the same date.
587-3P19-TDS&Condctvty .xlsxTbl B-3 - Aramar k Deletion (11/1 /2019) Page 1 of 1
APPENDIXC
LIFT STATION AND OUTFALL SAMPLING RESULTS
TABLE C-1
REGIONAL WATER QUALITY CONTROL PLANT (RWQCP)
II
11 l Sample
Date
1/1/2019
1/2/2019
1/8/2019
1/9/2019
1/15/2019
1/16/2019
1/22/2019
1/23/2019
1/29/2019
1/30/2019
2/5/2019
2/6/2019
2/12/2019
2/13/2019
2/19/2019
2/20/2019
2/26/2019
2/27/2019
3/5/2019
3/6/2019
3/12/2019
3/13/2019
3/19/2019
3/20/2019
3/26/2019
3/27/20
19 4/2/2019
4/3/2019
4/9/2019
4/10/2019
4/16/2019
4/17/2019
4/23/2019
4/24/2019
4/30/2019
5/1/2019
5/7/2019
5/8/2019
5/14/2019
5/15/2019
5/21/2019
5/22/2019
587-3P19-TDS&Condclvty .xlsxTbl C-1 - RWOCP
(11/1/2019)
SAMPLING RES UL TS
Wastewater
Flow to
Riverside TDS
(MGD) (mg/L)
1.61 770
1.93 780
2.04 980
2.06 950
2.15 830
2.21 810
1.99 950
2.02 890
2.01 930
2.10 980
2.18 800
2.07 810
2.10 860
2.08 850
2.12 850
2.01 900
2.13 890
2.02 910
2.01 900
2.11 830
2.06 870
2.13 900
2.00 880
1.99 930
2.01 930
1.99 910
2.02 930
2.01 930
1.96 940
1.96 990
1.97 920
1.98 920
2.01 870
2.02 900
1.97 900
2.00 970
1.95 900
1.96 890
1.96 850
1.96 1,000
1.96 860
1.95 950
1 of 2
ii
Specific
Conductance
(µmhos/cm)
..
..
..
..
..
..
..
..
-·
..
..
·-
..
..
-
-
-
-
-
..
..
..
..
..
..
..
·-
..
·-
--
--
..
..
--
--
--
--
·-
--
-
--
..
TABLE C-1
REGIONAL WATER QUALITY CONTROL PLANT (RWQCP)
SAMPLING RESULTS
Wastewater
Flow to
Sample
I Riverside
Date (MGD)
5/28/2019 1.92
5/29/2019 1.97
6/4/2019 1.97
6/5/2019 1.97
6/11/2019 1.93
6/12/2019 1.97
6/18/2019 1.91
6/19/2019 1.98
6/25/2019 1.95
6/26/2019 1.96
7/2/2019 1.90
7/3/2019 1.93
7/9/2019 1.96
7/10/2019 1.97
7/16/2019 1.96
7/17/2019 2.01
7/23/2019 1.95
7/24/2019 1.95
7/30/2019 2.03
7/31/2019 2.01
Avg 2.00
* Flow-Weighted Average
587-3P19-TDS&CondcM y.xlsxTbl C-1 - RWQCP
(11/1/2019)
TDS
(mg/L)
780
820
810
930
930
990
890
930
910
990
920
940
1,000
980
850
990
900
950
890
960
903 *
2 of 2
I
Specific
Conductance
(µmhos/cm)
--
-
1,500
1,500
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
Sample
Date
1/16/2019
1/17/2019
1/18/2019
1/22/2019
1/23/2019
1/24/2019
1/25/2019
1/28/2019
1/29/2019
1/30/2019
1/31/2019
2/1/2019
2/4/2019
2/5/2019
2/6/2019
2/7/2019
2/8/2019
2/13/2019
2/14/2019
2/15/2019
2/19/2019
2/20/2019
2/21/2019
2/22/2019
2/25/2019
2/26/2019
2/27/2019
2/28/2019
3/1/2019
3/4/2019
3/5/2019
3/6/2019
3/7/2019
3/8/2019
3/11/2019
3/12/2019
3/13/2019
3/14/2019
3/15/2019
3/18/2019
3/19/2019
3/20/2019
587-3P19-TDS&CondcMy .xlsxTbl C-2 - Regional LS
(11/1/2019)
TABLE C-2
REGIONAL LIFT STATION
SAMPLING RES UL TS
Regional LS 1,
Flow TDS
(MGD) (ma/Ll
2.131 4,900
2.198 2,200
1.953 860
1.842 920
1.927 910
1.918 900
1.812 980
1.887 870
1.941 930
2.014 950
1.930 920
1.888 900
1.848 800
2.071 850
1.903 890
2.005 840
1.817 870
1.923 890
3.047 760
1.903 890
1.992 900
1.928 920
1.880 910
1.893 960
1.976 870
2.033 970
1.959 1,100
1.941 1,000
1.873 950
1.912 910
1.894 930
1.990 930
2.038 880
1.839 900
1.702 790
1.~45 1,000
2.009 1,000
1.904 1,000
1.966 860
1.850 910
1.858 980
1.874 940
1 of 3
Specific
Conductance
(µmhos/cm)
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
I
Sample
Date
3/21/2019
3/22/2019
3/26/2019
3/27/2019
3/28/2019
3/29/2019
4/2/2019
4/3/2019
4/4/2019
4/5/2019
4/8/2019
4/9/2019
4/10/2019
4/11/2019
4/12/2019
4/15/2019
4/16/2019
4/17/2019
4/18/2019
4/19/2019
4/23/2019
4/24/2019
4/25/2019
4/26/2019
4/29/2019
4/30/2019
5/1/2019
5/2/2019
5/3/2019
5/6/2019
517/2019
5/8/2019
5/9/2019
5/10/2019
5/13/2019
5/14/2019
5/15/2019
5/16/2019
5/17/2019
5/20/2019
5/21/2019
5/22/2019
587-3P19-TDS&Condctvty .xlsxTbl C-2 - Regional LS
(11/1/2019)
TABLEC-2
REGIONAL LIFT STATION
SAMPLING RESULTS
Regional LS
Flow TDS
(MGD) (mg/L)
1.937 940
1.822 890
1.868 960
1.894 980
1.864 1,100
1.875 1,100
1.887 1,100
1.900 1,100
1.847 1,000
1.879 1,000
1.866 920
1.839 1,000
1.898 1,100
1.883 910
1.745 980
1.777 980
1.901 1,000
1.869 940
1.857 930
1.816 790
-- --
1.956 920
1.995 840
1.773 840
1.835 750
1.959 850
1.959 890
1.920 910
2.078 950
1.548 910
1.882 940
1.808 960
1.857 960
1.892 930
1.882 910
1.906 860
1.864 900
1.817 940
1.829 1,000
1.755 790
1.833 870
1.906 1,000
2 of 3
Specific
Conductance
(µmhos/cm)
-
-
-
-
--
-
-
-
-
-
--
--
--
--
-
--
--
--
-
--
-
--
--
--
--
--
--
--
--
--
--
--
--
--
--
-
-
--
--
--
--
-
TABLE C-2
REGIONAL LIFT STATION
SAMPLING RESULTS
Regional LS
Sample Flow
1,
TDS
Date (MGD) (mg/L)
5/23/2019 1.945 970
5/24/2019 1.855 880
5/28/2019 1.829 780
5/29/2019 1.874 950
5/30/2019 1.866 1,100
5/31/2019 1.826 910
6/3/2019 1.808 780
6/4/2019 1.818 980
6/5/2019 1.872 1,000
6/6/2019 1.877 1,200
6/7/2019 1.808 990
6/10/2019 1.794 1,000
6/11/2019 1.877 1,100
6/12/2019 2.077 1,000
6/14/2019 1.757 970
6/17/2019 1.779 880
6/18/2019 1.790 1,000
6/19/2019 1.970 2,800
6/20/2019 1.795 960
6/21/2019 1.806 1,100
6/24/2019 1.853 910
6/25/2019 1.835 1,000
6/26/2019 1.859 1,100
6/27/2019 1.870 930
6/28/2019 1.759 940
7/1/2019 1.600 870
7/2/2019 1.865 890
7/3/2019 1.797 1,000
7/8/2019 1.798 970
7/9/2019 1.908 1,000
7/10/2019 1.843 1,200
7/11/2019 1.886 920
7/12/2019 1.936 1,200
7/15/2019 1.834 4,400
7/16/2019 1.839 2,800
7/17/2019 1.981 3,600
7/24/2019 1.910 5,200
7/30/2019 1.887 3,700
Avg 1.892 1,132 •
• Flow-Weighted Average
587-3P19-TDS&Condctvty. xlsxTbl C-2. Regional LS
(11/1/2019) 3 of 3
Specific
Conductance
(µmhos/cm)
--
--
--
--
--
-
-
1,700
1,700
--
--
--
--
--
--
--
--
--
-
-
1,600
--
--
--
--
--
--
--
--
--
--
--
-
--
--
-
--
-
I<
Sample
Date
1/16/2019
1/17/2019
1/18/2019
1/22/2019
1/23/2019
1/24/2019
1/25/2019
1/28/2019
1/29/2019
1/30/2019
1/31/2019
2/1/2019
2/4/2019
2/5/2019
2/6/2019
2/7/2019
2/8/2019
2/13/2019
2/14/2019
2/15/2019
2/19/2019
2/20/2019
2/21/2019
2/22/2019
2/25/2019
2/26/2019
2/27/2019
2/28/2019
3/1/2019
3/4/2019
3/5/2019
3/6/2019
3n/2019
3/8/2019
3/11/2019
3/12/2019
3/13/2019
3/14/2019
3/15/2019
3/18/2019
3/19/2019
3/20/2019
587-3P19-TDS&Condctvty .xlsxTbl C-3 - Juan Diaz LS
(11/1/2019)
TABLE C-3
JUAN DIAZ LIFT STATION
SAMPLING RESULTS
Juan Diaz LS
Flow I TDS
(MGD) (mg/L)
- --
-- -
- -
-- -
-- -
-- --
-- --
-- --
-- --
- --
-- --
-- -
-- --
-- --
0.131 680
0.126 680
0.125 670
0.169 670
0.128 660
0.141 590
0.127 670
0.123 690
- --
0.136 690
0.128 630
-- --
- -
-- -
0.119 690
0.134 760
0.132 740
0.131 680
0.130 670
0.130 670
0.127 730
0.126 780
0.122 740
0.136 690
0.119 700
0.127 810
0.126 730
0.127 680
1 of 3
Specific
Conductance
(µmhos/cm)
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
-
--
--
-
--
--
--
-
Sample
Date
3/21/2019
3/22/2019
3/26/2019
3/27/2019
3/28/2019
3/29/2019
4/2/2019
4/3/2019
4/4/2019
4/5/2019
4/8/2019
4/9/2019
4/10/2019
4/11/2019
4/12/2019
4/15/2019
4/16/2019
4/17/2019
4/18/2019
4/19/2019
4/23/2019
4/24/2019
4/25/2019
4/26/2019
4/29/2019
4/30/2019
5/1/2019
5/2/2019
5/3/2019
5/6/2019
5/7/2019
5/8/2019
5/9/2019
5/10/2019
5/13/2019
5/14/2019
5/15/2019
5/16/2019
5/17/2019
5/20/2019
5/21/2019
5/22/2019
587-3P19-TDS&CondctvtyxlsxTbl C-3-Juan Diaz LS
(11/1/2019)
TABLE C-3
JUAN DIAZ LIFT STATION
SAMPLING RESULTS
Juan Diaz LS
Flow II TDS
(MGD) (mQ/L)
0.126 730
0.127 700
0.127 700
0.125 670
0.118 720
0.119 680
0.126 700
0.124 690
0.120 640
0.120 720
0.124 690
0.130 790
0.127 750
0.124 710
0.114 640
0.129 710
0.120 690
0.125 670
0.123 650
0.1 19 650
0.1 23 730
0.124 700
0.125 680
0.119 700
0.120 740
0.127 720
0.121 710
0.122 710
0.117 720
0.126 740
0.127 730
0.1 28 770
0.121 680
0.115 680
0.124 700
0.121 710
0.124 680
0.123 670
0.119 840
0.124 670
0.120 650
0.126 710
2 of 3
Specific
Conductance
(µmhos/cm)
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
-
-
-
TABLE C-3
JUAN DIAZ LIFT STATION
SAMPLING RESULTS
Juan Diaz LS
Sample Flow II TDS
Date (MGD) (mg/L)
5/23/2019 0.121 710
5/24/2019 0.116 750
5/28/2019 0.114 740
5/29/2019 0.123 710
5/30/2019 0.119 760
5/31/2019 0.121 810
6/3/2019 0,126 620
6/4/2019 0.124 590
6/5/2019 1.220 710
6/6/2019 0.121 710
6/7/2019 0.111 730
6/10/2019 0.126 760
6/11/2019 0.102 750
6/12/2019 0.115 760
6/14/2019 0.121 770
6/17/2019 0.124 740
6/18/2019 0.123 750
6/19/2019 0.121 730
6/20/2019 0.120 710
6/21/2019 0.096 710
6/24/2019 0.122 710
6/25/2019 0.120 740
6/26/2019 0.125 710
6/27/2019 0.119 660
6/28/2019 0.119 700
7/1/2019 0.123 720
7/2/2019 0.125 720
7/3/2019 0.119 760
7/8/2019 0.118 760
7/9/2019 0.123 730
7/10/2019 0.115 730
7/11/2019 0.121 690
7/12/2019 0.121 700
7/15/2019 "" ""
7/16/2019 -- --
7/17/2019 - -
7/24/2019 0.128 850
7/30/2019 0.124 690
Avg 0.134 709 *
* Flow-Weighted Average
587-3P19-TDS&Condctvty .xlsxTbl C-3 - Juan Diaz LS
(11/1/2019) 3 of 3
Specific
Conductance
(µmhos/cm)
--
--
--
--
""
--
""
1,300
1,500
--
--
--
""
""
""
""
""
""
""
--
1,400
""
""
--
""
--
-
""
""
""
-
--
--
""
""
""
""
""
APPENDIXD
RCSD ORDINANCE NO. 105
WATER SOFTENING RESTRICTIONS
'T'DS Stuay
APPENDIXD
RCSD ORDINANCE NO. 105
WATER SOFTENING RESTRJCTIONS
'Ayyemfix 'D
(A) No user shall install, replace, enlarge, or use any apparatus for softening all or any part of the water supply to an premises when such apparatus is an ion-exchange softener or demineralizer of the type that is regenerated on the site of the use with the regeneration wastes being discharged to the ground, storm drain or the District's collection system or POTW unless the apparatus is in compliance with the following conditions:
(1) The apparatus is a self-generating water softener;
(3) The brine solutions generated during the backwash cycles of the water softener shall be segregated from the fresh water rinses for disposal to a legal brine disposal site; (4) The industrial user shall maintain the electrical conductivity controlled discharge valve in proper operating conditions at all times . The industrial user shall notify the Manager immediately in the event of a valve failure and immediately cease the discharge of all wastewater associated with the backwashing of the regenerating water softener. (B) Pursuant to California Health and Safety Code Sections 116775-116795 and amendments thereto, no residential water softening or conditioning appliance shall be installed except in either of the following circumstances:
(1) The regeneration of the appliance is performed at a nonresidential facility separate from the location of the residence where such appliance is used; or (2) The regeneration of the appliance discharges to the waste disposal system of the residence where such app liance is used and the following conditions are satisfied:
(a) The appliance activates regeneration by demand control; (b) An appliance installed on or after January I, 2000 shall be certified by a third party rating organization using industry standards to have a salt efficiency rating of no less than 3350 grains of hardness removed per pound of salt used in generation. An appliance installed on or after January 1, 2002 shall be certified by a third party rating organization using industry standards to have a salt efficiency rating of no less than 4000 grains of hardness removed per pound of salt used in generation .
( c) The installation of the appliance is accompanied by the simultaneous installation of the following softened or conditioned water conservation devices on all fixtures using softened or conditioned water, unless such devices are already in place or are prohibited by local and state plumbing and building standards or unless such devices will adversely restrict the normal operation of such fixtures:
(i)
(ii)
l .. C' KRIEGER&STEWART ~ Enginccrin~ Consulr :int s
Faucet flow restrictors
Shower head restrictors
PageD-1
'T'DS Stuay
(iii)
(iv)
'Ayyencfix 'D
Toilet reservoir dams
A piping system installed so that untreated (unsoftened or unconditioned) supply water is carried to hose bibs and sill cocks which serve water to the outside of the house , except that bypass valves may be installed on homes with slab foundations constructed prior to the date of installation ; or condominiums constructed prior to the date of installation; or otherwise where a piping system is physically inhibited. (C) The certification required under subsection B of this Section shall be provided by the new user of the appliance and shall be completed by a contractor having a valid Class C-55 water conditioning contractor's license or Class C-36 plumbing contractor's license and filed with the City's Building Division. The certification form shall contain all of the following information :
(I) Name and address of homeowner;
(2) Manufachirer of the water softening or conditioning appliance , model number of the appliance , pounds of salt used per regeneration , and salt efficiency rating at the time of certification.
(3) Manufacturer of the water-saving devices installed, model number , and number installed; and
(4) Name , address , and the specialty contractor's license number of the C-55 and C-36 licensee making the certification.
(D) Any person installing or operating a water conditioning apparatus of any kind shall make such apparatus accessible to the Manager for inspection at reasonable times . (E) Notwithstanding subdivision 2 of subsection B of this Section , the District may limit the availability, or prohibit the installation , of residential water softening or conditioning appliances that discharge to the POTW if Manager makes all of the following findings:
(I) The POTW is not in compliance with the discharge or water reclamation requirements in its NPDES permit;
(2) Limiting the availability , or prohibiting the installation , of the appliances is the only available means of achieving compliance with waste discharge requirements issued by the Regional Board; and
(3) All nonresidential sources are limited to the volumes and concentrations of saline discharges to the POTW to the extent technologically and economically feasible . (F) Notwithstanding subdivision 2 of subsection B of this Section, the District may limit the availability , or prohibit the installation, of residential water softening or conditioning appliances that discharge to the POTW if Manager makes all of the following findings:
(I) The POTW is not in compliance with the discharge or water reclamation requirements , or a master reclamation pennit , issued by the California Regional Water Quality Control PageD-2
'T'lJS Study 'A_p_penaix '1J
Board pursuant to A1ticle 4 (commencing with Section 13520) of Chapter 7, Division 7 of the Water Code;
(2) Limiting the availability, or prohibiting the installation, of the appliances is the only available means of achieving compliance with the water reclamation requirements or the master reclamation permit issued by the Regional Board; and (3) All nonresidential sources are limited to the volumes and concentrations of saline discharges to the POTW to the extent technologically and economically feasible. (G) Subsections E and F of this Section are prospective in nature and do not require the removal of residential water softening or conditioning appliances that are installed before the effective date of the subsections E and F.
This Section shall not apply to an apparatus of the type which is regenerated off-site by a water conditioning company.
A person installing or operating a legal water conditioning apparatus of any kind shall make such apparatus accessible to the Manager for inspection at all times. The person shall submit reports relative to the operation of such apparatus to the Manager as the Manager may require. l ~· «I' KRIEGER&STEWART ~ En~i11ccri11g: Con s ultant s Page D-3
EXHIBIT D
Letter from Jeff Sims (General Manager-RCSD) to Ed Filadelfla (Deputy Director Public Works, Wastewater Systems-City of Riverside)
December 28, 2020
Re: Agua Mansa Commerce Center - RCSD TDS Planning
Rubidoux Community Services District
Board of Directors
John Skerbelis
Hank Trueba Jr.
Armando Muniz
Bernard Murphy
F. Forest Trowbridge
General Manager
Jeffrey D. Sims
Water Resource Management
December 28, 2020
Ed Filadelfia
City of Riverside
Public Works Department
5950 Acorn Street
Riverside, CA 92504
Refuse Collection
Subject: Agua Mansa Commerce Center
Street Lights
Rubidoux Community Services District TDS Planning
Dear Mr. Filadelfia,
Fire / Emergency Services Weed Abatement
The Agua Mansa Commerce Center ("Project") is a proposed industrial park on approximately 300 acres located within Rubidoux Community Services District's ("District") service area. The Developer of the Project processed an annexation of the Project area through LAFCO to move the Project area into the District. The LAFCO process involved the District preparing a Plan of Service document describing how the District would provide water and sewer services.
This Plan of Service dated October 30, 2019 (revised July 14, 2020), attached, was reviewed by various agencies including the City of Riverside ("Riverside").
The District owns 3.05 MGD of sewer treatment capacity rights in Riverside's treatment plant through a series of agreements dating back to 1978. Through these capacity rights, the District operates a sewer collection system to collect sewage from customers within its service area and delivers approximately 1.7 MGD of sewage to Riverside for treatment and disposal services. The District pays Riverside variable rates for flows delivered (flow, TSS and BOD surcharges) based on rates established by the Regional Advisory Committee. Subject to current litigation are certain capital expenditures for Riverside's upgrade and expansion of its treatment plant. Decision on that litigation is anticipated in spring 2021, leading hopefully to a satisfactory settlement agreement resolving disputed costs, and establishing agreed upon future relationship expectations.
Riverside owns and operates the wastewater treatment plant ("Plant") and is subject to a NPDES Permit issued by the State Water Resources Control Board. Amongst other permit compliance requirements, discharge of recycled water 3590 Rubidoux Blvd. Jurupa Valley, CA 92509 P.O. Box 3098 Jurupa Valley, CA 92519 951-684-7580 Fax: 951-369-4061 www.rcsd.org
W~ter Resource Management Refuse Collectlan Street Lights Fire/ Emergency $~1'Vl~e~ Weed A'gatement fr<>m the Pl,mt to the Santa Ana River is limited to .a rolllng t::Hnonth average forTDS of65.0 mg/I. Rivers)de contlnue.s to achieve this compliance requirement. • •• •
Entitles such cJS the District who dischargeto Riverside's .Plant are expected to (lellver sewaEle With 650 mg/I TDS, or less. currently the District ls µnab le to meet tf,1Js Umit due..to natur<:\HY ~><fating TPS in the grounqwater thatfs pumped, treated, ahd delivered ~s potable water. The District is' solely dep.endent on groundwater. Pumped groundwater by the tHsttlces six wells hM a concentrc1t\on of cJPPr<>x.Jmately 540 mg/I TDS. With a use incre:ment by District c:ustomer:s, s1;1wag~ deUv13ri:!d to: ~iverside ~as an-approx,tmat~ con!Sentrajlon of 750 rng/l Tl)$. To state the qbvlous, th.Isl~ above the limit promptit'i_g Ri.verslde Indicating: ltHoncern at the LAFCO proceedings considering annexation .of the Project to the District. Rlverslde<obJectecl tothe ~dditlort of new at¢a$ lhto the District :absent the Dfstrict pr(:jvidln,g aTDS Mitigation Pl,mto address TDS m i~S s¢Wage alJovethe 6$0. !Y\g/l lHnit.
Dis~rlct staff cqmrnut:1.lcat¢(.f Wlth RiV.er$ide st~ff regarding the Pl'arrof senticefor th:eProJect specifically on the· TDS· ma:tter; Th¢ Plan O:f.?~tvke for-th er ProJe~t was m~dlfle:d tP in:dude ~ cortditlon requiring the Developer ~o .ln&tall rever$e qsmosls treatment in eaoh bulldlngto treat enough dfthe Incoming potabiewaiet from th~>P.istrict tqremove suffltlemtTD$ $9 the s.e1Nage discharged from e~cih building would: be at or'below :650 mg/l'TDS; W!tli addltltin oHhls lntQ the Pia rt QfSerylcei HJv<:!r$l~e (in:ippea:h~ pbJet:tiPt:l and 11\FCP a()proved· the Pr0Ject1s t_ttinexatlon. into the DlstrJtt. ihe District undef$-tands RiversJde-wantln& the DJstrlet to provide a ros Mlti~alion Plahoutuhlng an Implementable serles Qf a_cflpns tQ redµc~-QV¢raRrotco.ntribQtiqli. vJ!thin Pistrkt sewageJo b¢ aitor below ~so rntll,, Dlstrlct:Md Riverside stiff concur this is a'fundamental watE!r supply pro!:>li;m .and ~rs part0oHhe pi:;trlgt's growth tow~r~,s tilfimat¢ buUtj,out the s.oi1:1tip,n W.111 by necessiW;. b:Eil funded In part tlirough ·growth. G'rowth provr~~s n~w capital and customer ~ase to ll!)ptem~rtt fps M!tlg~tion-~9Ju:tlons. • - -
Altho.ugh thfTDS problem has h'>:the ftjlly resol\i¢d, b(.llow are efforts· t~e Dtstrl'ct has tal~en and plamilng:
Compleled Efforts
1, Removal .of Aramark Uniform servfoes, lnd1:1strial Discharge to Ojstrlct,s C«>llectton ,svstem The Dl$trlct t,1.1¢tessfuliy ·cooNUnated remb.v~I of approxitn'Ately.o.zs MGD of hlgh TDS s.ew'1gefrom its-sewer c.ollectlon system. Tnls w<1.s ~on~ by assisting, Aramark With s¢curJn.g, li;~L discharg¢ rJghts from Dairy F~rmets ofAroer,!ca; acql,lirlh~ a dis<:natW~'J>ermit from SAWPA, District fumlins of a new pipeline tQ mov¢ htgh TDS s~wagf:! flow to tltelEB:L, andrefunciin« Ararn;irk. $¢Wer ~apacttyfees paid to:the DJstri.clto defray costsAratnil:rklncurred to p'\Jrchiise IE Bl ~IS~h?lt'g~ rightirfrom DFA. The District'-'? l,lpr-t1¢lPation :ofpve:r $3. tnlUloti re,st,ited in perrn11nently 'lowering r.es coAcentration approximately 200 mg/I. • .- • •
2, 'Initiated .seektM consu!t1ngsenjices for.Anatvzing-Addltion;gfoistrict,ownecl RO, Treatment late fall :2019, Pi strict received a proposal from Haien & Sawyer consulting Engineers for prelimlnarfMglneJ!rlrtg to:
a, Qevelop a.n ~1n~et~tin(tfng' of c~rre,ht Mf:1 ultimatevplumes Qf k>w TD$wc1ter ri¢eged to ~lend with existing RCSD potable dellverles to .enable sewage to be di$cha rged at1:;,r below .650 mg/i TD$. b. Siting of M RO Ttea.tm~iit Plant
c. Baww~te.r piping to delly¢r water to the RO treatment Plandrom 'District wells and treatment plants d. Plplnglo deliver brine to the IEBL
e. Planning, design, permitting; and c0nstruct1on estimates f. Qperatfonal expenses
2 g. Analysl$ -of wh~toth'!!r Cl.'.)ntc:1mtna,nts wquJd be TemQY!;!ci tg u!')derstan~ impacts pn o,ther (;)Xisting District Tre.atm.ent Factl!tk~$
The District stall.et.I on prq.ceeding with thl~ effo:rt. due to state Watt¼r Re1.;~urce CQntro.i: ~qa rd: b1Vlslon ilf'Drfhklng Water's (''ODW") lowei'lng of PFAS contaminant Notlfk:atlon and F\esp.onse Limits. With the lower Um Its; all District VJ(llls.~r~.Just QVetth~ R1:t.&P.onse; l.lmlt.f~.r PFOA. Aithtiugh not. vetJii1 IVICL,. DOW ls.su.ed the-DlstrlGtati Order r:rrnnq~tlng qua11111rhtsqrnplfog for PM$•\';Q.r,tt1;1trl'inants and r~pprt.lns. ·th,i:1• 1;1v~r~se·Qf thEJ•fo.1;.1r quart.er s.anrples'ln ih~ fll'utth (luarter of2021, To have .the Olstrict'.s annual ave:r~ge of quarter.lysamples b.el'o.wthe· Ftesponse Llrr:flt1 the Distrfot in[ti~t~d-efforts to Mfctfon excMnge trlil.!:'ltrit~ht for Wells 1A1 -8, and '18; and Gll.\C :tr.eatment for-Wells 4 and G.
W~'.11.Z: a·tre~dy h~d GAG tr<,atment f~r· 11~)~,:rcp, makh1,e it eawt..cr simply ch~ngt) oµtWl l'r\EidiaWJth m~dl'A th:at suG.cessfully remo.11es both PM'S and 1;.i;s-rcP. Althouah RO treatm~nt: woul~ h~v,fb~-'<J!n th'# pr~ferr!?,d treatr\'lent as r~ wewl~-rem.PVfl rn..Ultlpla cqnt:a:miniin.ts, lbcl.u~rns TDS,. th1?1r.(itwa$-l11sitffi.clen,t time t:o ln1plement:aihd 1~:d'ifeve.a ,b~low R~,~pqns$ limJtf. pr p·FoA bY 4111 b;uartert<J.:?J. Th~fDlstrlct wlifspend ~ppr.ox.liMat~iy $4.s rnlilipn by,Augu$~ ;zoit on add:resslhlf Pr.AS that otherwfa~ .could hav-~ $Prr!lf tow~r.tjs ~q. frlila,meo(o,r :s~ro:ur.!t1g IPW TO$-importe~. watedor blendl'q~; As:·-a, notej, .Rl.vtrrslde :W!H tecelve,some atrdlllary benefit With addrtlor. o.f rFM:trE1atmerit b.Y tile otstrlctas the.re ;$.h~Old :'be Ih,tJ¢ to ~q, ltMs::in bi'~tri~ts,ijVJ~llit~ ~eiiY!:lrJt1s·1 The'Dlstrfot-and wvwo·haveppt~b{e WJ1t~r,plne.lhw~,w!,.nln:j,l ftW f~,~tpf~~~t)Q.t)Jer.nearWU~o.n Eind.:Fle~two.1:i-ci lh.
Jutupa v:a.ll_eiy;,_qA, oi:strliit.~taff dlsquiis~'~,wlth·-vyvw~. t\tlah.l':lg~rmai'lt -~~:9ut,~'1ttl~gJn 1:1r1 lnterl;)aen\\y:l'nterttttfto..mov.e low,ro.s: WYWI)., wat~H.nto thf;i-Dls~rrct. Tljo-sll! ·dl~cu~sl:ons ,1ea:cl. tti D.q1.1g Hei!~r.lcl~; ·GM ~.t$ai1Bernard.1t:rQ valley ,MW:~ (slh.ce-retired),, l,Ja frldlca:b~d that. ~µ1rtb $sVM.W.o·be.Jng t1,$t;;j\~_,-Wa,t~.r-prpJect (l!.SWP-'1}: Cqntta.Qtqr ;;in~ WV"!iilq :~\t!lrts Wlthln..S13VM\NO,WVW:D: aat\fiat sell $WP w:aterw.t:thlh'Jl~bthi!r'.SWP Contrat:tor'S::a:rea, Th~' m~trlctis pa.,rt of Wettarrn M1;1.h\¢1pal-W:at~r Ol$trIPt:Who 'I$:•~-rnembe(1;1g(;}ncy 01 1 M¢tropoiltan \r1/ater'bh.1trk;tr an:other SW.P Contr~ctot, Appar~ritly, there 'ar~ aritl~coinpedtlan ru·1es .disiiffowlng. sWP wa.ter'transfer$ ~~~Wl1!.~n ,$WP·-tqntrn_c.tqr$, ·thi.~ pvt'~ll !:\Md.to' t:hl$!~·1tetn~ttve.
4. ,D.evtili!e;J;!mdm!.andfng·.otV1>l1;1m~ o.f Low-TOS:Wab:ir;'(,<400 mstltl~~eedeij Th~. rfist_riqt r.!:lqU.~$tii/d.·!<rl.eger ~rid St,e.W.!:lrt CcmsµJthJg ,En~li:f~e,rs ti:, ~~(¢,Wl'~te .~pprQ,X_lmillt.<i\,VOlutn.~ioflow TD$ wat~.r ( <40.0 ma/I} necessary to .enable the .. DJstrtcHcnneet-a ·ijSO mg/110$: fn s.ew.agt;! d.~IIV<;1re:d tt.l Rlv~r$Td¢·at ,qurr~ntand ultlm~te· bulld~aut.i;terrY~md_s, These e~Jc.µla~lb.ns reflect:
Condition
Cur..rent
$:µllc{¢,ut
kCSl)-:and.JCSb floard :of bfre9t9rs. apprqv~~"' M!;!r,nc;,r~!J,dµm .9f vn,ger~tani;Jl~g :(/IMO.UV) J;:,:utnnfrui pr\ndple& 9f ecicip.e:ratiQ·n on prctJii1ct$ lncludfng dexteltipmehf ot::water.suppnes. 'Jhe-MO'U was stenect Match 24, 2.020. wa,s,tar.n Murtlc,i.lpal Water P.lstr!<:t by so~sfJqli~ht :arn¢n~tne.nt w:~~ -Eldcl¢_1Ja:S -~ parti/ tolhe, MOU. Throug~ 'this MOW It .is antltilpated' Imported wat~r-~.l/PPIY-effortlwlll b~ lnVEJ.$~ig~ted .l;!,nd ·1mpl~m~n.tl;l~, • Stl·.e.et Ughts Fire / Bnre1~gency Servlr.es , Weed Abatement Efforts Underway
a. ,UQ~ates; to Dlitrlct's 2015 Water ,and' Sewer Master l?lall!l Th!% Oistrl~t h,as r~c;e,ive.d p.r1;>po~~Js, frql'fl fput c~nst.iltJng firms to UP,ct.i:l,tlif the Dlstrlc.t 1 s to1s Water and $.~we.r Master
Plims. SE¼l.ectfon·of a. consultant.-~nd t1pprov~I. ~Y· the p1~,rl¢t"~ 6Qafq pf Oirept<mi l~ $Ch<;id.ul~.d fo.r)anuary .2.9Z~, .As part of thi':! Upda.te, ros Mil:/gatloh wm be:Jneluded, The water Supply, ca1ri'ponent o:fthe-Water Mast.er Plalii Will consider th~ following alternative$:
$, RCSD owned RO rre.atrne.nt.
b. PU:rchirse pf low TD$ water for blend.hig dQw.n tos co,r1centrat1on. Op.tiqn$:
1, W:ai:ei' dellverEid by Riverside a:twet;t..emlo.f. pro.posed pipeline in Misslon-Brid_gerepl'acement z. 'W~t~r rJ.i\illVM§d .vfo.JCS.J). to the.JCSO/RCS.D Jiitertle at Jew.el Stre.et. a. W~te:r fr9r:n .J¢$OJhrQ.ugh •f;I -n~.rtti~m ~9P!1!il¢.dori ltso.. wo,1,11~: mf}ke thri;iush partn11Jr.ship-wlth Cllcanru~q~aValleyWatetllistrlot, ·rhis water would trav~l through a proposed:~rra:tilte.-Stree:t P.lp'elltt1e: O.htheh:Qrth $lqe :ofthe.'60 fre!:i'\NtWand ¢Q'i'ltiectlnto t.he·JCSD/RCSD Jewel Streijt ln!ter~l.e: • .
4·, W~·ter d.ellvere.tt·by l'\iverslde, tit proposed pl_pelJne,foVan 'Buren 'Brtcls.fl·wheeled to HCS.O vi.a JQS:l)fs :$y~t~r,n to the JCSDJRCSD.J~Wral $tre.f;lt iht(!lrtJI':}', With 'thls i:lnii!IY.sl$ l\ufillementatt,;m CQ.sts1 schedules-, :and oP.e.ratlomtl i:!osts· will be lhcl,ud'ed for e1;"1ch option, Ther-ewnr . be·a rif~ ,cy.c1¢ cost co~!larls(th, imd ·prot~nd coh$, ltJs ~ntJolpat~Wthe :mas.terrtJl~rt U.~d~te·s Will ta'i<,e upw.~:r.ds qf9. rnqnths ~q Pt$.P-~t!il al'd; a:ppt9v~ ... Qrwr§\ a,p.ptov,~:~. ar,fa ro,$. Miti$.~t!ciri:o~tro:n. is se:1e~t'et1:,:th~ t11strl¢t• Vlllll$~1ei;t-.~ c.ol'lsiiltantto gehet:ate-.a co.tnpreheh~hi/:iCbst•of-S.ervic.e..St:udy, tthfa·.Studywlll pro.vide-thenexus analysis supporUna allot~t1011 ijf'.<iiilt$. t>~twii!et, w~tet.a:nct sewer ent~tpd~:e:s, .est~bUsh 'es.socl:ated c~pac:ltffea$~ al'id. rat¢' pr?Jei::tlons:.
With :r~q!Jlff:l:d:. P,llbl,l.o h~~;r\'ng$ <1s$0.i::J,at~d Wl'th settlng:fe.es; an~· rate$;: an :~d#ltJqnal Yt~r llke.ly,.wUlpl:!$.$ ·flf~er .\::Qmpl~tlon ofthe master pla.n UJ>dat~s to g~t ao.ard c1pprove.d rates and feesJn place to s11pport the. se.lected TDS' MltJgtitlon/W.~t,et$..~pply 011>tlot1. • • •
7, Zll:15 l)\lll'l\ilP U'pdate
,AWrA Retnifrjrt,t~nt$'--EIUHl VJ.tltl~ta~fllfy Mte~smel'lt ,dperatlan:~I ;stra~eSM
'fb•e Olsti.1,~t wln ~e a.w~tdl'ti@l tbese·t.hre.e -~ffort$ tQ the tQMU!~an·i S.!3le/Jt~d forth, .Wat~r ,~nd.,S.e.wer mMtar pla» ,l\p~a.tli.!s, .C>f ilg~iflo.an:t lh:lpltirtan~eJs·the,QperatlQ'n?J.Str,1:1t~gyef;fo.rt, With f.ld,dltion of thEi ,treatm,ntsystemsfor PF.As. remova.1,th:e Dlstrlct. wants a str.a:te,gyto-avoid wate.r quality, problems wlthln the media .. th~:·OperationalStrateey will prcMde s.r.ilcian,ce for OJ$ttlot o:p~r.a.t.ortorl' nm tl1rtes·al1d frequency, Further teflA:e.m.e:nt Will include. el¢.ctrical rates anq.qJle~it(\I qpns1;1mptkm..
a.. ,[email protected] .. ;s1:rategl~!
Other strategies have been discussed -
4 a. .Sun;ruu;g~ al112roach: ln t~·!io.ry :an agency exce.e~Jng the 1i'D.S ll;rt\ftwlth !ts q)s9harge I~ reducln'!.~ tl'\(il ova.rall surp1t:1~ cte!;lted by agencles:discharglng below theTDSLim.lt, A s1;1rcharge strategy would ch~rS,1t the a:s~ndes exoe~olng th!;¼ TDS Limit~ With gehe.rated ~urcharge reve.nue sh1;1red am·on,istthe 'ag~n•cfo·$ er¢atlng,the ~urpltrs t~P'1city. Alt.ho\1sh th!$ str~tegy from utrlqt ~qliltY st~mdp~tnt may have merits? ltwould. make lffli:1andaUy more dJfflc1.Ht for the exceed!n:g:agendes to Implement ,bs l\ilJtlgatJrin•pptlolis to reduce: a.c:tu~I TL?S io.aq., Thitstr.at~gy trnay-M apprd.prlate to· encour~se cqmpllanpe Jf M ~ffort ls ~eing m~dEi, or if the recycJ$d watf;lrqtsch.arge o.f the Pi~nt ln whpl~ I~ at risk ,of not being compliantwlth..the NPt:lES TDS·Umtt.
Salt credlt.abproatll~ Un:clrJ.t ~- ~on<;ept Qf ttthe. sum 0.f thp1 p.i'.i.rts e_qua Is th~ whole\ in theory If Pr.W dlscharged to:the. Santa Ana River from th~ Pl:an~ r~rn~1n$ b~low. iil~q:mg/lTbS, woeve th~ ,a~t_u~I TO$ come.$,from pecorne.s lil"l'I ·a.ceo'untrn1:rtune:t1on. For agE!hol13s with.dl~.charge helow es:o mgll there ociuld be· stjlt qe~ !ts f'lceo.urited·f<;)r In p.o.cintjs .an~:p.~_teJ1ti~liysok1 :o:r. tr~~e.4: TO. l)lu~tr!l,b~,.J.G.SO ~-¢w~g!ll di~~harg1ft1;r0!\iv_1:ir.~ld(:(h~~ t1)q~9lrt~Wlt.b "his:~ than GSQ'.h'.l.gfl..rO.S.an<:t ij_,qe;-t~ln,q1;1i;1tl:tity qf TQS_p.ounds cotild b~ c~!eulated, RCSt;>·ex<:eedsros: by ·a: ,~ertaln qua'n"~lty· of'p<;>uncts·wm, it$ $ewa.M aisch~'r:ga to Riverside:, Jc.so: ri~~~-s ~vM.titl.~S.◊-fpo,t~:hle wate.r tQ s.~ppi~rfl'ehtt~elr supply'. :RCSD .. ha:11.s)<~'~ss POt~l,;},IJi!W~t~r-~JIP,l)ly; ltt'11ilre Wa!} an ~gr.!:!~l;l:-va.Jµ~ Pl.1 PQIJIJQ~ qf:$a,Jt1 ] 1eu 1~$~(ftt~~jt~l\-P-~~:e,Oti~Jly. ·volumes of w.a.tefe.6.ulct b,e::tradlird fb.r iialt.i:;h;idlts betW:e.en::Jcso::a nc1 RC:sci. Th is strategy-wt.mid be tt;1:mporary.VntO perm~.lll:IJ\tTDS" Mlt.iij~tkm. is ih: pl;t1'1;:$:.at'idWCiOld. ne.~ifafl.pt(lva1 by RIV~r~ltf~:ibd pg~~otl~l.lv.th~:S.W:~~.a:. •
_Partial. Hold p.p Us~;of Ojstrfot:0\/lined ·Treatmetlt; Csipacltta 1he:Ols:trlot (.)l#ns; 3'~PS -'MwP 6f1ir~atroent :i:apae_l\y·~nd .cyrr,cin\lV .t;1~e$:~p·pto~lhi~t~1y "[.~ 7)\1:ctp;. '~a:~etj. qn-tj:Jtr¢ri~. Dl~t.rlqt-ffpW -PIIJ~ P.hiJe,~t-f:Iow, to.ta.I fl_OWWhUl~ ~-~ ~~p~0k_!mat·e1y "1.713:4:J\ir:GO.i~.h'ci With ~µ(rent1'0S ,COti-:;1:mtratlo.n,. the b!strlot w.ould co.ntr.lb.l:l~ ~ppr9I<lrt\~~1;1l\{-.l,40P 1~.s/~~y ll.:!S.~~PV,~ the, t:)so;rn'~fl'Urrllt, The: e~ceii's 10$.etjqate:sJtf approximately 0.26" MG[), ·of c,p\:lcity:if'confrlb~t,e~ ~-i. 5$0 wi.a/:!:, ~po~~l.p,l~w,iw ,o e.M~~.r~,se,,ti;;~ coro:plla1tc!\Hs the'Dtstrict e!il.uld ~Sr(i\e-'to. ~t,t (f hold .on tise ·o.r.o:2'6 MG0:,th1trebytellluct1tif c'a'pacltY ~v~llabif.i,tQ. Ql~ft9 :t;1$:J\iiGJl(~;;Q5 MC4b. :....o,i6..'M.Gt5;),. t,hij tilstrktwoulcl contiti.0¢. t(t.pay tfilild.~nd capl.tal coritdbutlcmsJiased-.on ,owned 3.05".MGO, 'fhl~wat~gy.Qp.es 1-1ot:t\q~re~s OV!'¾.tage·~-1.il.T:b.$ ~tffJ "to c.o.n.centra.tlon b:ut would present a Way-to oa:p overall p.oUods,, .StrategJ':ls,·8a thro.ugh '8.C. ~re-pres.ant~~ for .co.Oi\pl~tlilnf:f~~-'911lY'• '.(~¢ lll"strl:¢~Pr~.f~ts ,s;i wp.rk.wlth Rlv~rsJ~~:-on \t'i'tplem•eiitlniw s,.trate.-rd\\lS!ihaf:reduces,TCi$'c:◊hce.ntr:~tloh, • Thi~ wlll.l,le.ni:/flt :the :tlA'.lt:able W.ater cus.tom~r-While t$dutln~ TQ$. p·q.Qn(;!t dls1.harged to th:e S.~ntri1 Anti"River~:s:ulthnijtirbu'li,c:1'. out flows are exp~dence.d-, lt'ls an.tfdpat(;lcl P"r>tkms wh~rg low TOS htiportwaterfram W~stfmt l§ ()~lh,~r~d-W~h~; t'.listrl¢fttwlll"JrivolV~-'R!v~r-s:ld,.,for W:heelingi th,itTb$· lViltlg_<JtkmJ,Jitfot'fs ~n~JY.'4~·q.w.lt.h th.a P.1.$trlct Mast¢r Plan ·Updates wll.i hi:ive. di.fferent lmpte_mentatlo.r\ s~hedules. Ukely· It. will takl;l ·,~ +:y~~r$ JQ ·lmPl!i¥fl'.ie1:1t rev.er.s~r9$tnQ{!I~. • :1roppr.t~_q_:w.~teNplt1tlpn~ c.pul4. pqt~n.t.i1:1.~1y be aoo11er-d¢pendrris on 'Whi.ch option ls-ti'tfplemented, The. mstrlctwlll share with .RlVe.rslde tn.e·drafi: Master .Rian U.p:dat~.& f.tw·inrut cJt!'<l r~vlE;W.i
The Pc.iv.eloper_ of .the ProJ._ect.Js·.stattlnftd~.si_ttn.an tiiial Wata·r an~ se:Wetr,foi'.l"s aild ·now .coming to g,rlps With t~e lmpllca.!tlolis of tl')e c0.ndition :in the Pla:f:i ·of:servtce r~qttl.rt.ns a.tldltlon of r.we-r$¢ (;)sl:)1:0Sl:s tFe~ttn.ent'fore~¢,h ,o:f th·e buU~lhsli, ih:e PrQJ\:lC.t-.p~op·oses·v:,r:y, lii1:rge·'b4llqlngs wit~ log)std:c:,$ I,!~~ rt1sul.th)t(lnvi;;i:v low w~ter: de.m~n~ ,ar:rq s:~w~ge dlscha~ge projectl.ons. Th.e. P.roJect~s-ciVetall ~e¼<JSe dl$.char1:Je·1s e$tlmated to b.e 0,0134 MGD .(:tsj,40.0:,gpd). Usit:ig;the D.lstflqt's. ·av~ra~e tos.· concen.tratton of 1-s·o m:g/1; "the estim.~t:e.d ·exe;:e$.S tos c;;ontribution by th~-ProJ~"t'it" (only} ts 85 5 Water Resoul'ceManagement Sh'el;ltl,lghts Fire / Emerg(;lllcy Services Weed Ab~tement lbs/day. The Developer has asked the District to evaluate If the Plan of Servlce condition requiring addition of reverse osmosis treatment on potable water connections for each building lnthe Project be reconsidered.
Given this condition was included in the Plan of Service to address Riverside's concerns about the Project's annexation to the District, the District is submlttlngthls letter to request RivEirsidE?'s conslder~tlon to remove the condition. If Riverside agrees to allow the Project to proceed without addition of reverse osmosis treatment for each building, then it Is suggested Riverside prepare a letter' memorializing this, so It can be retained in files for the Project at LAFCO, Riverside, District, and Developer.
Progress on actual TDS Mitigation has been made over th,e past couple of years by the District and full compliance will rel',lllstically t;.:ike addltlongl time and money. tos Mitigation Is a high priority for the District and WIii pe addressed in the Master Plan Updates as discussed herein. The Mt1ster .Plan Upd~tes wi,0 provide the foundational nexus for a comprehensive Cost-of-Service Plan to implement fees and rates to support TDS Mitigation expenses. New d¢v<;ilopment, such as the Project, generates revenues helping fund viable TDS Mitigation compliance by the District.
Thank you for your consideration of this request. If you have any questions or need additional Information, please do not hesitate to contact me at 951.512.1253 orjsi([email protected]&,, JEFFREY D. SIMS, P. E.
General Manager
Attch:
1. Agua Mansa Plan of Service
6 "Rubh;Jo:µ,x Connunnity $¢tvices Dist1·ict
Pfau otServi~es
fot'
Agua 1Vfaosn C(Ullme-rce C~nter
(Amu.ix~tton t1.w APNS l 1i!~170~02.1, ".0:08, .. oJ.6, ..:040t .. 042i '\043f·"'046, • l 75.:llJ'O.;OOl, 17$'.~Z~.0\,00:1 thx•o.ugh .. ()051 and ,.OO'It tbrQugh .:Q0.9) Octobt.v $0~ 2019
.July 14,;ZQ20(1•~yi$~d)~
*r~vis~d t9. -r~m~Ye:refc.~e~c~,.fo AJ!N OC7.$ .. _110•· :0:05and· po1·t~OJ\ 9(AJ.>N J75-~170"!,o:06·whi¢h ~---~ _:l).ot- pttt· .ot the . o.w~ership .of Orest1uo1~,,
Jl~dev.~lo.pmegt, LtC
Ct~:smi;pre;:R~de.vefop~netit,LLC (App1foari.t) ls .. proposing tobut~d '@itid.qstti~\ p~fkon:tb~'.:8'03,:k .~Pr~· aJt~1 .. 1:n.e·. iinn~~o,tfo.n: la propo¥J~d .. :£o~ $l~te~tt t16): exfstfug aase§$oi;$ · par.c~ls, -as .follows-1 AP.Na l7:!"f70-0Vt,: ..:02.at·".OZ(t, ... 040~ ·~-9.42~ ~04.a~·:~n~ ;q46;:}75"t8Q\'QQ,t; ,~d 17,~,,zQQ;Qol,_ -~\n:~t~~lt ~OOSr··ml.d: ~Q.07 • tl1t9u~l\. ".009, "located on: the -southeast ·hoh1et .of the btte1•seotioli· of JJ.ubldoux: ::Boulevard '.a)!).d '.El Rtvino Road ilnthe • Cicy of Ju~up~Va!l'fYi T:he .geMr.~l tp,Q.~ti(m ~f *~ ·J.!~?J~~~ is.Ju :t , l;l.qnt~f1. a~4..$.Quti~::S~~:a:~11.1tttdtn0, Qu1;1.d~t»$l~ •Map;, $eotfon :j_:ofl'~wns~p ~ $OU:tb; :N;(lrt~i;-S-• . . ( .. the .Ptoje:ot $it¢ b':a,p~ro~hnately t .4 mile$ no~Jl .qf Inter~mte. gQ (I-~Q) @d; :~;;$ w,11~·s. *'uth _qf tnt~f~,t~te. 1:◊ (J.;iO}-The Project ;vv,ill. ·utdmate~y ·b.e served. fi;om :the iQ.istdct1,s. ¢}Xiijtiti'g)~#dtlSQU .Pte.s~w:e.Zone. S.e.e:'J.l'igure 1. • A-l1-slxteen·1>atc~ls: ,ar~l to·.be,annexed i"rlf P: t}J\f Rubl~og~:Co1nn,,urd:tY'.Se1-vic!:\s·;P.fstd"f(Rdsn, '.or '%e l.lisidofj)"fot Water., Sewtr.~ Fb:~,.-S()ljd·. Wt,\Ste,, _ _-and :sti~et Mghti~~ s~rvfoes, The. totat • ru:mexati~J.). 1~9 ~3. app,;9~i.ma.t~ly"i90)t~cte:h 'th4tl .. $UbJtet ·:\'r~~er:fy.,affiofrt.s th~ a~tifo~ ar~a-ot R;u.bidoux t:.'forbinunity Servlc.es b.isti!ib.t:.(RCSD)~ and-Is within the :p1_stdqf$ ~p.he,~·of:mn.we1we,.
ANNEXA'.IIQNMAP - FJ9VRI!! 1
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~SESSOR'S PARQEL NUMBERS
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Hi:1im&i~
1ts-110.~C.i~e
175.:110,040
175•11Q-04~
1],5~17d-,q4~
175•170~046
1ta.1'so:.oti1
17$~200~001
11,5i2bq.¢62
17,5~2Q0.~0Q3 17~~g9q;p94
175,200-005,
~i~~~&ti~t 11iI-200:009
1 Altliil\igh the AJtja Mansa Commerce Cente1· Specific Plan ls approximately 303acrc~, the pl'<>posed ani\tl~at.l<in is for 290;2aPres. 'the re.mt1inin~ 12,8,aores were annexed $Cp!lrately by CatPortland, Rubidoux Community Services District Plan of Services
This Plan of Services utilizes infonnation from the District's 2015 Water System Master.PJan Update (Master Plan), which addresses water demands and master planned facilities for the Project. This Master Plan is currently being updated. Land use information was obtained from the Riverside County General Plan and the City of Jurupa Valley Planning Department General Plan. The 303± acre site for the proposed industrial development is currently developed with the Riverside Cement Plant, a quarry for the mining of limestone for the manufacture of cement and cement products, and various support buildings, The tentative schedule for the Project has a start date for construction of approximately 2020 with the first occupancy anticipated in 2021.
Fire
RCSD contracts with CalFire and Riverside County Office of Emergency Services to provide fire protection services within RCSD's service area. RCSD will provide fire protection services to the subject property. The closest County fire station is located at 5721 Mission Boulevard, Jurupa Valley, CA 92509, which is approximately 3 miles southwest of the subject property. The Department provides full service municipal and wildland fire protection, pre-hospital emergency medical response by paramedics and emergency medical technicians, technical rescue services, and response to hazardous materials discharges. The applicant/property owner of the subject property shall pay a one-time Fire Mitigation fee ($0.41 per square foot) to RCSD.
Solid Waste Disvosal
The District contracts Solid Waste Collection Services to Burrtec Waste Industries, Inc. solid waste collection service is currently provided by RCSD to properties that are within the RCSD service area. The Burrtec Waste Industries, Inc. yard is located at 1850 Agua Mansa Road, Riverside, CA, which is approximately one mile south of the proposed site. Therefore, RCSD will provide solid waste collection services to the subject property following development of the site.
Street Lighting Service
RCSD provides Street Lighting servtces to its customers. As part of the annexation into the District's services, the street lights along the frontage of the subject property will be included.
Sewer System Improvements
There is an existing 12-inch sewer line in Rubidoux Boulevard to the southwest of the Site and an existing 8-inch sewer line in Brown Avenue to the east side of the Site. Existing on-site wastewater is conveyed to septic fields on-site with no flow reaching these existing public lines. The Project will install new on-site sewer distribution infrastructure and two new sewer connections to the existing sewer lines in Rubidoux Boulevard and Brown Avenue .. Buildings 1 and 2 will have a minimum of two points of connection in order to accommodate multiple tenants if necessary.
Buildings 3, 4, 5, and 6 will have one point of connection.
Rubidoux Community Services District Plan of Services
All wastewater collected by the RCSD is conveyed through regional wastewater conveyance facilities to the City of Riverside Regional Water Quality Control Plant (WQCP). The WQCP is located on Acom Street in the City of Riverside. The current capacity of the WQCP is 40 million gallons per day (gpd). The RCSD currently flows approximately 2 million gallons of wastewater to the WQCP daily.
The total preliminary estimate for the projected sewage generation for the Project is 8,752 gpd based on the Utility Report dated January 21, 2019 prepared by Langan Engineering. Future quantities of wastewater conveyed by RCSD to the WQCP have been reviewed for the next 25 years and has been noted that the WQCP will have capacity for the anticipated wastewater flows from the proposed Project. Further determination and assessment by RCSD during final sewer engineering design will be conducted to identify the exact sewer discharge flow.
Total Dissolved Solids
The Rubidoux Community Services District ("RCSD") owns sewer discharge rights through Contracts with the City of Riverside ("City") for wastewater treatment and disposal at the City's wastewater treatment plant. RCSP and the City continually monitor the wastewater influent and effluent to ensure compliance with the City's Wastewater Plants regulatory permits ("Wastewater Permits"), including the levels of Total Dissolved Solids ("TDS") in the wastewater effluent. TDS includes inorganic and organic salts dissolved in tlie water and wastewater. TDS occurs naturally with potable water delivered to customers and is often elevated in wastewater from customer and industry use of the potable water. The Wastewater Permits include limits on TDS levels allowed in the wastewater effluent. A key challenge is that wastewater treatment plants, like the City's, are not designed to remove TDS unless they have advanced treatment systems, such as Reverse Osmosis. Therefore, to maintain the TDS wastewater effluent Permit limit, often source reduction efforts are required. The City current Wastewater Permit has a maximµrn TDS limit for discharge of recycled water to the Santa Ana River of 650 mg/1 based on a rolling 12-month average.
TDS is naturally occurring in the groundwater within the region, includiQg the RCSD service area.
RCSD has been historically, and currently continues to be 100% reliant on groundwater for its source of potable water delivered to it~ customers. Groundwater pumped within RCSD's area has a natural ambient TDS of approximately 520 mg/1. This naturally oc~urring TD$ cQntributes to the concentration of TDS in the w~stewater received from within the RCSD service area ("RCSD Wastewater") and to TDS levels in the wastewater effluent discharged from the City's wastewater treatment plant. The RCSD is preparing a plan to evaluate TDS levels in the RCSD wastewater and recommend action(s) to reduce IDS levels in the RCSD Wastewater ("TDS Reduction Plan").
TDS levels in wastewater may be controlled through reducing TDS in potable water prior to use by the customer, reduction in customer contribution of TDS ("Customer Use Increment") and treatment of wastewater. TDS reduction treatment is typically accomplished through filtration or chemical treatment processes: Industries that discharge high TDS wastewater (i.e. Industrial laundries, fabrication plants, etc.) are required to treat their industrial wastewater to decrease TDS levels (and other contaminants), prior to discharge into the public sewer system. RCSD has an existing industrial pre-treatment program that focuses on these industrial discharges. The industrial pre-treatment program complies with the City's requirements for industdal dischargers. The RCSD TDS Reduction Plan will comprehensively review options to reduce IDS to Permit limits in wastewater delivered to the City. Options anticipated to be included in the IDS Reduction plan are: reduction of TDS in potable water deliveries, and more control on Customer Use Increment.
Rubidoux Community Scrvl<:os Distrlot Plan of Services
The Project will be required to comply with the following requirements that will reduce TDS levels:
1. A11y industrial user that generates a btgh-strength w~stewater mustJ1.pply for a perinit and. comply with the RCSP Industrial Pre" Tteatmeti:t program, including all currently adopted limits for the discharne of pollutants ~s adopted by the RCSD and as applicable to the specifi<i ind1;1strial user,
2. a. Comply with the ROSP T:OS Reduction Plan;, or if the TDS Reduction Plan has not been ad<>pted prior to the issuance of the first buildinij permit; then I:>. Gootl:li11~te with RCSD to develop a plan.that will insu1·e wastewater deUvered into RQSP's sew~r colleqtion syst(ln1 for trefl.ttnettt at the City;$ TreatmeQt Plant will nothave a TPS conc:entrati◊n ex;ceeding 65'0 mg/l, The TPS control methocls. wlll be t;1cq9n:iplished u~ing standru:ds mutually agreed to wHli RC:SD and may inolu<le TOS r¢1')1Qval tWitment for potable wat~.r delivered to the Project iµ Whole, or for each indivklual building within the Project. Tb$ removal is not required for irrigation systems or fire prot~otion systems. ~t~rsystem wnroYf;p:acnts
The subJe9t property will be served from an existing ~.4;, water main within RCSD's Atkinson Pressure Zone. •
The estimated fire flow is 4,000 gpm with a .m(nimµrn l'.~st4µal pr¢.$sµr(;} of 20 psi at th.e Project site. The fire Department wnt $tip11late the required ffre fiow £cir the Project.
The Appti◊ant will iust"U a 24~ihch nre wate~· and 2.,inch potable water m.~in.s from Rµl,idQUX 13lv<;_l beading east to tb<:l site ppint o.f comieotions (met~1· and detector check) approximately 850 linear feeteach. The estimated average day domestic potabl~ water dema,n(;l fot tb_e ®,tletaHon, for the pr9pos¢d boHc.lln&s, is 6.18 .gpm.
IS:on•fqtoble lY?iAAt
The District does 11ot currently hEt.ve recycled waJer in the project at!;la.
Water Sunply an4 EJ¥cilities
Th~tDi!1tri91 Wt.!$ form~d onNQvemller24, 19$2. The :Oistdct's service area is situated in the eastern portiQn qf the City 0,f JJ.!Np.a Valley in rover;sid!;) Co\l.nty, California, approximately S.Q 1t1i1es eas.t of Los Angeles. The service boundaey area is currently 8,5 sq1,1are mil~s. The P'istrict is bo~d~4 by ·sau Be((l~dlno County on the north and west, the Santa Aha Riv:er on the south, and the City of Riverside to the east.
Rubidoux Comrnunity Servic(}s Pi$ttict hi:\$ over 6,800 metered connections, io;cludin~ 6AQO residential and 400 commefoiaVindustrlal uses . .O.ne. hµndred percent(! 00%) Qf RG$D' s water supply is obtained from gtoundwatel'. and other outside.water sources are notrequired. RCSD has appi:oxhnately $0 miles ofpipelin~ with 11 active production wells (6 potable water and 5 non~ potable water with 4 storage reservoirs and 2 booster sta:tkms.
Presently, the subject property is outside the District's boundary but within the District's sphere Rubidoux Communily Services District Plan of Services
of influence. As stated above, the District is not currently providing service to any of the proposed parcels or any existing buildings at the site. The existing buildings are using "well water" for non-potable uses and potable water is delivered to the site. There are no connections to any potable or recycled water at the site.
The District's Water Master Plan recommends that the Atkinson or 1066 RCSD Pressure Zone ultimately serve the Project. Water supply for the 1066 Atkin~on pressure zone is from seven RCSD groundwater wells. The seven wells supply water to two storage tanks with a combined capacity of 5 million gallons. The existing Atkinson or 1066 is adequate to provide pressure and water supply for fire flow and domestic service to the Project.
Exl)ected Pressures
Atkinson Pressure Zone
Major backbone facilities in this pressure zone are in place to support the Project. The District's flow tested hydrant on Avalon St near Rubidoux Blvd, in October 2016, was used to predict system pressures within the Atkinson Pressure Zone for the Project. The District's flow tested hydrant results indicate that the static pressure was 74 psi. During maximum day plus a fire flow of 4,000 gpm the predicted pressures at the site is estimated to be 20 psi. • Required Potable Water Facility Improvements
The following are the required backbone potable water facilities that must be installed and shall be in accordance with the District's Master Plan.
• Install a 2-inch potable water main from Rubidoux Blvd heading east to the site point of connection (domestic meter). The 2-inch potable water line shall be terminated at the most westerly property line of the project where the meter is located. • The applicant shall install all water distribution lines in accordance with District policies and design standards:
• Design and construction of all facilities shall be in accordance with drawings prepared by the Applicant and approved and signed by the District.
• All pipes shall be ductile iron pipe with push~onjoints. The minimum pressure class of the pipe shall be Class 150. All pipe and laterals shall be encased in polyethylene bags in accordance with District standards. In addition, the applicant shall install fire hydrants or 4-inch blow-offs at the end of all lines for line flushing. • The applicant shall install standard 6-inch fire hydrants in accordance with District standards. The Fire Marshall shall approve all 79 fire hydrant locations. • The applicant shall install minimum 2" copper services from the water main to and including angle meter stop and coupling fitting in accordance with District's stand Rubidoux Community Services District Plan of Services
drawings and specifications. All service laterals shall be located horizontally within the public right-of-way and minimum 10 feet clear of all sewer laterals.
Figure 2 - Existing and Proposed Sewer Facilities
LEGEND:
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COMMERCE PARK
"CoNCEPTUAL ~~::...~.".. •,r, ~~
SEWER .,.;:n,,,.... SS-01
ON-SITE "" ...... I
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Figure 3 - Existing and Proposed Water Facilities
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CONCEPTUAL
WATER
ON-SITE
PLAN
Rubidoux Community Services District Plan of Services
Recycled Water Facility Improvements
RCSD currently does not have recycled water facilities.
Water Supply
Table 1
Groundwater Production (YEARS 1977-2010)
·- - Nomul ,&lnalo DJY Mullipll 0ryrt11orY11r1
Wlt•iY11r WtlerY■ ar
AJvtrtldt B11ln 120101 ,um ,01, 201• 7015 -
Polrlbt.1\Vn\at Vlo'ils 14,ll<lO U ,000 1•.000 i•.oco U,000 Non-PolDtlo WalorWdt J~0OO J,000 3,000 3,000 l.000
ToUISupply 17,000 17,0GO 17.000 17,0IIO. . 17,IIOO
Porconl lif Normal - 100~. 1001\ 100'/, 10<m
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Rubidoux Community Services District Plan of Services
Exhibit A
RCSD Boundaries and Sphere oflnfluence
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Area Boundary
Ultimate RCSD Service
Area Boundary
Exhibit A
District Boundary and Sphere of Influence
Rubidoux Community Services District
Robidoux, Catiromla
Rubl<ioux Commuolly Services District Pl11n of Services Riverside~Arlington Subbasin
The sole sot1tcei of potable water supply for the District a:nc:l fqr all water users in the Rubidoux CorntnuQity is groundwater extracte4 from the southem pol'tiM of the Riverside~AtUngton Subbasin (also referred to herein as the Riverside Basin) of the Upper Sant~ Ana Vall~y Grcn,indWater Basin. The Basin encompass-es the DisMct's entire service area. the District cut1:enily does 11ot purchase or otherwise obtain water frq1.11 a wbol~s~fo water s4pplier, and reoy9Jed water ls not 0111.'l'.ently available to the District. the Di$trict expects that groundwater extracted fromtbe B.asil'.l 1:>y six polable a11d slx non.;potable (irrlgation only) groundwtlter well$ wffl continue to be its primary (and possibly orily) source bfwa,tei-thro\1gh the yea,:2040, ®d possibly beyqnd. •
The Pistrlct ex.tracts groundwaterfroin the Riversfde~Atlington Subbasin (also ref~ryed tQ herein as the Rivernide ijasj~) ~s its $Q1.u:Qe of W?ttei; sqpply. Cal.ifotnta's Groundwater ))ulletin 118 (2Q03)i prepared by DWR(cont~in~ s~pplemen(~l fofonnatlon th~t is upJ:Jate<i ~s H faycomes avaih1b)e, an;d data for th~ Riverside~Arlington Subbasiµ was la$t .. updated in 2Q04. The Rive~$ide Basin encompasses a. ~µrfoc¢ at.~a Qf§,$,QOO apres (92 $:qµp;i;¢ mHes) within p<,nkms, of ltiv¢r~jde a,nd San Bernardino ·counties. The Riverside Basin un,clerlies part <>Hh~ s~.rit.1:1. Ana ruver VaJley i.n i:iort4w~stero, Riv1,3.r~ide C.qu1:1.cy au,<:!, s~uthwestentSan B.etnardino County. and is. bounded by impermeablemcks of Bo,ccSprlngs Mo:ttn!ai11s on the ~.o\ithea§ti Arliqgton tvlotJp,tah:i on the $0.Utlt, La Si.erra Heights and Mount Rubidoux on the n:otthwest, and the Jurµpa Moun.tah1s on thenorth.
The tJppe,r~~1;1ta Ana V~Uey QroundwateJ::aitsln is adjtt4foat~d, as set forth (nJudgml;lnt No. 784i6 (also teferl'ed to herein as the J311sln Juqgtrrent). A,cc◊rl'.fitlgto S~c.ti~m IX(~). of th~ :a~sJn Judgi:1:wnt, entei'.ed April 17~ 1969, 0overany five.;year period, there m~y be extracted from such Basin Area, wlthcmt replenishm~nt ol:!Ugati9n, im amount eqyal t,g five th:nes such annual aver~gefor th" B~in Are!:l; provid¢d, however, th~t lf extractions in any y¢J\l' ~x~~q ~uch aver~ge ~Y m9r~ than io percent, West¢fn TW~stern Munfoipal WatetDistrictJ shall provide repleulshmeht fo the following year equal fo the exc;e.ss extra<.lti~ns over sw~h 20 perQe.At pe~l11g !:lllOWl:\1100,11 ••
The 1,3as.in Ju!:lgment required the annual determination Qf extraoti9ps fl.'QXA the Riv~r~i<.le l3a$in and fu.qher reqob:ed th;,\t Western repterii~h .sald basi.n if the apnual extracdon$ e~ceed the qtiAAtlties al.lowed by th(} judgm~nt. Repl~ni,sm.nep.t h.as never be~n reqrtired p,t¢yloi:tSb', but if repleni$hmentis evet required> the costs fot such replenishment would potentially be alloi::.able to th!:l grqµn4wat.er !:lxtractors, lncl:udln$RCSD.
In ,August 2015; t>WR. released a draft list.of 21 groundwater basins an,d sub basins significantly overdrafted by 11exgesslve11 pµnu:ifpg itJ. response !Q a sed¢$ of(;fl(.ecutive orders issµ~d. by Governor Brown sfo.ce ianuaey 21)14. The ruverside*Arlington Stibbasin was p,Qt in<;lµc,l~d in this I!st, D~ pqhlished t.he, fit.l@l list in Janua112016> with no changes .to the designation of the R1vetside~ArHngton Subbasin.
Rubidoux Community Services Dislricl Plan of Services
Water Demand Analysis
Table2
19\19 24,856 5,466
2000 25,367 5,6)1 198
2001 .25,850 5.922 5,288. ◄ 61 :205
2002 2U-I0 6,733 G,010,A26 22D
20n 28,824 6,11) 5, 156,963 ·:203
2004 27,305 6.5115 5,887.235 218
200~ _27,760 6.3()1 5,G27.ol0~ 203
2000 ZD,251 6.8-11 6.10ft.D35 218
2007 2&,717 6.!!>4 G.l!i4.1 ◄ 7 214
2D0& 29,11, 6,511 5,&12,250 153
Buolln~ (Avorogo vi Gro,.s Waler Usa fur f!)!J!),21)08) :io, Rubidoux: Community Services Oistrlct
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Plan of Services
EXHIBIT E
Agreement No. A0-5314
Agreement to Provide Water to Rubidoux Community Services District DocuSlgn Envelope ID: E7FF5961-568D-44BE:-8DD6-CAD96000A03A AGREEMENT NO. A0-5314
AGREEMENT TO PROVIDE WATER TO
RUBIDOUX COMMUNITY SERVICES DISTRICT
This Agreement to Provide Water to Rubidoux Community Services District (Agreement) is enteted by The Metropolitan Water Distdct of Southern California (Metropolitan), San Bernardino Valley Municipal Water District (San Bernardino Valley), West Valley Water District (West Valley), Rubidoux Community Services District (Rubidoux), and Western Municipal Water District (Western), collectively the "Parties."
RECITALS
A. Metropolitan is a State Water Project contractor and a metropolitan water district organized under the Metropolitan Water District Act, codified at section 109-1, et seq. of West's Appendix to the California Water Code, and is engaged in developing, storing, and distributing water in the counties of Los Angeles, Orange, Riverside, San Bernardino, San Diego, and Ventura. Metropolitan has an existing agreement with San Gabriel Valley Municipal Water Distdct (SGVMWD) that allows for the delivery of water through SGVMWD's San Gabriel Valley Devil Canyon-Azusa Pipeline using SGVMWD's unused capacity.
B. San Bemardino Valley is a public agency incorporated under the Municipal Water District Act of 1911 (California Water Code Section 71000 et seq., as amended) that is engaged in wholesale delivery of water in portions of the counties of San Bernardino and River$ide. San Bernardino Valley is a State Water Project contractor that primarily imports water into its service area through the State Water Project (SWP).
San Bernardino Valley has 50"percent capacity rights on SGVMWD's San Gabriel Valley Devil Canyon-Azusa Pipeline right up to Riverside Avenue in the City of Rialto. San Bernardino Valley has an existing connection on the San Gabriel Valley Devil Canyon -Azusa Pipeline that can also be used to deliver imported supplies from Metropolitan to a portion of Western's service area,
C. Western is a municipal water district incorporated under the Municipal Water District Act of 1911 (California Water Code Section 71000 et seq,, as amended) that is engaged in retail and wholesale delivery of water to customers in western Riverside County, Western purchases imported water from Metropolitan and helps provide water to over 1,000,000 1 DocuSlgn Envelope ID: E7FF5961-568O-44BE-8DD6-CAD95000A03A people in its service area,
D. West Valley is a County Water Distdct, a public agency of the State of California, p1·oviding retail water to approximately 95,000 customers. West Valley's service area overlaps five political jurisdictions: The Cities of Rialto, Fontana, Colton, and Jurupa Valley; and unincorporated areas of San Bernardino County, including the community of Bloomington.
West Valley's service area overlaps the service areas of two SWP contractors, Metropolitan and San Bernardino Valley.
E. Rubidoux is a California community services district providing retail potable water, nonwpotable water, sewer collection and treatment, solid waste collection, fire protection services, street lighting, and weed abatement services to approximately 40,000 customers in its service area located in the City of Jurupa Valley. Rubidoux is within the service area of Western but currently has no connection to imported water supplies and is reliant solely on local groundwater sources.
F. The Parties desire to enter into this Agreement in order to provide water to Rubidoux fo1· use within Western's service area (which is also within Metropolitan's service area).
AGREEMENT
NOW, THEREFORE, in consideration of the foregoing recitals and the representations which are incorporated herein by this reference, warranties, covenants, and agreements contained jn this Agreement and for other good and valuable consideration, the Parties hereby agree to the following terms and conditions of this Agreement.
1. Requests for Water. Rubidoux. will coordinate with San Bernardino Valley, West Valley, and Western on determining the monthly amount of imported water Rubidoux needs from Metropolitan. After coordinating, Western will request delivery of the water from Metropolitan in accordance with Sections 2 through 4 below, inclusive. The requested water must be used within Metropolitan's service area.
2. Metro12olitan Deliveries. To the extent there is sufficient unused capacity in the San Gabriel Valley Devil Canyon-Azusa Pipeline, Metropolitan will request San Bernardino Valley to deliver Metropolitan supplies equal to Rubidoux's requested amount to San Bernardino Valley's connection (Lytle Creek, Station, 1747+00) on the San Gabriel Valley Devil Canyon- 2 DoouSign Envelope ID; E7FF6961-568D-44BE-8DD5-CAD95000A03A Azusa Pipeline. The maximum amount of water that Rubidoux can teceive from Metropolitan under this Agreement during a calendar year is 2,000 acre-feet.
3. San Bernardino Valley Deliveries. San Bernardino Valley will deliver the water that it receives pursuant to Section 2 to West Valley,
4. West Valley Deliveries. West Valley will treat the water and deliver the water to Rubidoux through an interconnection, per terms identified in a separate operating agreemement between West Valley and Rubidoux, for use within Western's service area by Rubidoux ("Operating Agreement").
'5, Interconnection and Meter. The interconnection between West Valley and Rubidoux will be constructed at no cost to Metropolitan and will be metered in accordance with Metropolitan standards for new service connections, as set fotth in Metropolitan's Administrative Code, commencing with Section 4400, Classification and Rates, Section 4500, Water Service Regulations and any other applicable provisions of the Code, as amended from time to time ("Metropolitan's Administrative Code"), More specifically, the Parties shall comply with Metropolitan' s meter calibration and standards, which are outlined in the Final Plans, dated December 4, 2023, the Final Specifications, dated December 18, 2023, and the Operational Agreement between West Valley and Rubiodoux. As set forth in Metropolitan's Administrative Code, Metropolitan reserves the right to request verification of meter billing records, mete1· calibration records, meter discrepancy repmts, and 1·equest necessary repairs/replacements in the event of meter or billing discrepancies. The Parties shall calibrate all meters used for billing pUl'poses a minimum of every six months. The Parties shall be responsible for investigating meter discrepancies that fall within their respective ownership to identify and cotrect the root cause of such discrepancies.
6. Bi-directional flows. The Parties acknowledge that the interconnection may provide for biwdirectional flows, and further aclmowledge that this Agreement does not address that issue. Any future proposals for bi~directional flows from Rubidoux to West Valley through the meter will require further agreement amongst the Parties, and is not allowed without prior written approval from Metropolitan.
7. Coordination. The Parties agree to coordinate to develop procedures for the ongoing operation of this Agreement.
8. Monthly Amounts. Rubidoux will provide Metropolitan, San Bernardino Valley, 3 DocuSlgn Envelope ID: E7FFli961-668D-44BE-8DD5-CAD95000A03A Western, and West Valley with a monthly meter read report of the amounts delivered by 3:00 p.m. on the fifth business day after the end of the month to account for the supplies.
Reconciliation of water deliveries will be allowed in subsequent monthly accounting.
9. Billing and Payment. Western will pay Metropolitan's rate for full service untreated water in effect at the time of the delivery of the water to San Bernardino Valley's connection for use by Rubidoux within Western's service area. The delivery is subject to the capacity charge, readiness-to-serve charge, and all volumetric water mtes then in effect, in the same manner as deliveries made to Western through Metropolitan's distribution system and connections. Metropolitan will bill Western, and Western will pay Metropolitan, in accordance with the billing and payment provisions of Metropolitan' s Administrative Code, as amended over time. Rubidoux will reimburse Western for all payments Western makes to Metropolitan .tmder this Agreement. San Bernardino Valley and West Valley shall have no responsibility for the cost of water delivered to San Bernardino Valley's connection for use within Western's service area by Rubidoux. Metropolitan is not responsible for paying any costs under this Agt·eement.
10. Wate1· Use Restrictions. During a time when the Department of Water Resources is administe1'ing SWP allocations pursuant to Article 18a of the Water Supply Contracts, or during a time when Metropolitan's Board of Directors has declared that a regional shortage is in effect, the same guidellnes, pt'ocedures, and limitations that Metropolitan applies to its Member Agencies, including, but not limited to, water supply allocation surcharges, volumetric limits, outdoor watering .i-estrictions, or other response actions to preserve supplies in times of shortages, will apply to deliveries made pursuant to this Agreement.
11. Depal'tment of Water Resources. Metropolitan will be responsible for any Department of Water Resources charges for the State Water Project supplies delivered to San Bemardino Valley's connection under this Agreement.
12. Term. Upon execution, this Agreement is effective as of __ 6_1_1_11_2_0_2_4 __ _ and terminates on November 4, 2035.
13. Cancellation. Notwithstanding Section 8, any Party may terminate this Agreement by providing at least 30 days written notice to all the other Parties provided that the notifying party is not in default under this Agreement.
14. Liability and Indemnification. Liability and indemnification shall be governed by 4 DocuSlgn Envelope ID: E7FF5961-568D-44SE-8DD5-CAD95000A03A section 4502 of Metropolitan's Administrative Code. San Bernardino Valley, West Valley, and Rubidoux each agree to the provisions of section 4502 ofMetropolitan's Administrative Code, which provisions are incorporated here by this reference, and agree to its enforceability by or against each of them under this Agreement in the same manner and to the same extent as that section applies to Western.
15. No Third-Party Rights. This Agreement is made solely for the benefit of the Parties and their respective pe1mitted successors and assigns (if any). Except for such a permitted successor or assign, no other pet'son or entity may have or acquire any dght by virtue of this Agreement.
16. Ambiguities. Each Party and its counsel have participated fully in the drafting, review and revision of this Agreement. No rule of construction to the effect that ambiguities are to be resolved against the drafting Party shall be applied in the interpretation of this Agreement or any amendments or modifications thereof.
17. Entfre Agreement. This Agreement constitutes the final, complete, and exclusive statement of the terms of the Agreement among the Patties pertaining to the subject matter and supe1·sedes all prior and contemporaneous understandings or agreements of the Parties. No Party · has been induced to enter into this Agl'eement by, nor is any Party relying on; any representation or warranty outside those expressly set forth in this Agreement.
18. Signature, The Parties agree that this Agreement will be executed using DocuSign by electronic signature, which shall be considered an original signature for all · purposes and $hall have the same force and effect as an original signature. All Parties will receive an executed copy of this Agreement via DocuSign after all Parties have signed.
19. Relationship of Parties. Nothing contained in this Agreement shall be construed as creating a joint venture, pattnership or any other similar arrangement among any of the Parties. No Party to this Agreement shall be deemed to be a representative, an agent or an employee of any other Party. Unless otherwise expressly specified in this Agreement, no Party shall have any authority or right to assume 01· create any obligation of any kind or nature, express or implied, on behalf of, or in the name of any other Party, nor bind any other Party in any respect, without the specific prior written authorization of another Party. The obligations of the Parties shall be several and not joint.
20. Amendments. No change, amendment or modification of this Agreement shall be 5 DocuSlgn Envelope ID: E7FF5961-568D-44BE-8DD6•CAD96000A03A valid or binding upon the Parties unless such change, amendment or modification is in writing and duly executed by all Parties.
21, . Time of the Essence. Time is of the essence in the execution and performance of this Agreement.
[signatures on following page]
6 bocuSlgn Envelope ID: E7FF{596H68D-44SE-80D5-0AD95000Ao3A
THE METROPOLITAN WATER DISTRICT
OF SOUTHERN CALIFORNIA
APPROVED AS TO FORM: r-:; QpoUSlgrted by; • •
LMti.ro~ ~··
F~/fi2Am6~ 11 . arcrn . cu y
General Counsel
SAN BERNARDINO VALLEY MUNICIPAL
WATER DISTRICT
Chief Executive Officer / General Manager
APPROVED AS TO FORM:
c;:zn~t
4E'£1HiEt'~~feld
Ge11eral Counsel
WEST VALLEY WATER DISTIUCT
r:;~g~:i
~ 14:ffiti~Prfff'el
G~netaf Manager
Dated
7 6/11/2024
Dated
5/16/2024
Dated
4/30/2024
Dated
4/18/2024
Dated
5/14/2024
Dated
s;v2024
DocuSlgn Envelope ID: E7FF5961·568D-44BE-8DD5-GAD95000A03A
WESTERN MUNICIPAL WATER DISTRICT
Ge1ieral Manager
APPROVED AS TO FORM:
QJr8&io/
•9f~frf:HlUihge1·
Legal Counsel
Dated
Dated
RUBIDOUX COMMUNITY SERVICES DISTRICT
r:Di>cuSlgned by:
~tUA, v,.,J,tl.»-stMN
EDf3ffi2flfdddusaw
General Manager
APPROVED AS TO FORM:
Q:~g;;tr
- 4Jeffi11318P!lff,er
Legal Counsel
Dated
Dated
8 4/15/2024
4/11/2024
5/16/2024
5/14/2024
i !
EXHIBIT F
Analysis and Impact of 750 Additional EDUs to:
1. Rubidoux's Sewage Flow
2. Riverside's Water Quality Control Plant
Analysis and Impact of 750 Additional EDUs to Rubidoux's Sewage Flow Assumptions:
1. Current Rubidoux sewer flow to Riverside= 1.72 (MGD) [al
2. Current Rubidoux TDS concentration in sewage sent to Riverside= 787 mg/L lbJ
3. Current number of RCSD sewer customer connections= 6,8001'1
4. The current unit generation per connection is 252.9 gpd/connection (1.72 MGD / 6,800)
5. Current Riverside WQCP flow= 26.7 MGDlaJ
6. Current Riverside WQCP TDS concentration= 590 mg/L [di
7. Current pounds of TDS from Riverside WQCP = 131,380 lbs/day (26.7 x 590 x 8.34)
8. Current RCSD contribution of TDS at TDS concentration of 787 mg/L and flow of 1.72 MGD = 11,289 lbs/day (8.6% of Riverside WWTP total) ------------------- ------- -----· ·- ----- --
[a] - Based on November 2023 Flow Report
[b] - 12 mo. avg. (ending Nov '23) based on WQCP influent data provided by Riverside staff [c] - Combined Residential and Non-residential
[d] - Provided at the November 14, 2023 TAC meeting
Based on those assumptions the following is determined:
Incremental Impact of 750 EDU Additions:
1. Added flow from 750 additional connections = 0.189 MGD (252.9 gpd/connection x 750 additional connections)
2. Added RCSD contribution of TDS at TDS concentration of 787 mg/I= 1,241 lbs/day (.189 X 787 X 8.34)
System Wide Impact of 750 EDU Additions:
1. Estimated total flow with the 750 future connections= 1.90 MGD (1.72 MGD + 0.189 MGD)
2. Estimated total pounds of RCSD sewage flow of 1.9 MGD and TDS at 787 mg/L = 12,471 lbs/day (1.9 X 8.34 X 787)
3. RCSD pounds of TDS at flow of 1.9 MGD and TDS at the 650 mg/L limit= 10,300 lbs/day (1.9 x 8.34 x 650)
4. Total excess RCSD TDS contribution at flow of 1.90 MGD = 2,171 lbs/day (12,471- 10,300) Summary:
The additional 750 units from Rubidoux adds 0.189 MGD of flow and 1,241 lbs/day of TDS at a concentration of 787 mg/I.
Note: The following page analyzes the aggregated WQCP impact based on Rubidoux's incremental add of 750 EDUs across two different scenarios:
Scenario 1: Incremental add of 750 EDUs (Rubidoux growth only) Scenario 2: Addition of 750 EDUs and 5% growth for JCSD, ECSD, and Riverside Analysis and Impact of Additional Sewage Flow to Riverside's WQCP Agency RCSD JCSD ECSD Riverside Total
Discharge (MG)l•l 51.61 88.67 18.01 641.06 799.35
Discharge (MGD) 1.72 2.96 0.60 21.37 26.65
% of total 6% 11% 2% 80% 100%
TDS (mg/I) 787.00 [bl 544.00 [cl 640.30 [c] 579.09 [dl I 590.00 I [el TDS (lbs/month) 338,746.36 402,292.24 96,175.24 3,096,067 .77 3,933,281.61 TDS (lbs/day) 11,291.55 13,409.74 3,205.84 103,202.26 131,109.39 [a] - Based on November 2023 Flow Report
[bl - 12 month avg. based on WQCP influent data provided by Riverside staff [c] - Provided directly by JCSD/ECSD
[d] - Calculated based on known TDS concentration for JCSD, RCSD, ECSD and WQCP [e] - Provided at the November 14, 2023 TAC meeting
Scenario 1: With added 750 EDUs (RCSD Growth Only)
Discharge (MGD) 1.90 2.96 0.60
TDS(mg/L) 787.00 544.00 640.30
21.37 26.82
579.09
TDS (lbs/day) 12,470.80 13,409.74 3,205.84 103,202.26 132,288.64 Overall TDS Concentration
Summary: Based on the incremental add of 750 EDUs in Rubidoux, the WQCP TDS concentration would increase from 590 mg/I to 591.32 mg/I, an add of 1.32 mg/I or 0.23%. 591.321
-------- - ------ ------- --- - --------- - --
Scenario 2: With added 750 EDUs plus 5% growth for JCSD, ECSD, and Riverside !fl Discharge (MGD) 1.90 3.10 0.63 22.44 28.07
TDS(mg/L) 787.00 544.00 640.30 578.80
TDS (lbs/day) 12,470.80 14,080.23 3,366.13 108,308.19 138,225.35 Overall TDS Concentration
[fl - There are a number of different developments ongoing in Rubidoux at various stages of their project.
Based on what Rubidoux staff currently knows about the progress of these developments, Rubidoux staff estimates it will not realize 750 new EDUs for 3-5 years. Additionally, Rubidoux staff is aware of significant development in the western section of Jurupa Valley, which is served by JCSD and for which sewage is collected and conveyed to Riverside for treatment. Further, its reasonable to assume within a 3-5 year time period, ECSD and Riverside will likely see growth themselves . For purposes of this analysis, growth for the other WQCP partners is estimated at 5%.
Summary: Based on the incremental add of 750 EDUs in Rubidoux, and 5% growth for the other WQCP partners at their current concentrations, the WQCP TDS concentration would increase from 590 mg/I to 590.43 mg/I, an add of 0.43 mg/I or 0.08%.
590.431