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Presentation ContentPresentation Content

•• General acceptable usesGeneral acceptable usespp•• Irrigation and creek usesIrrigation and creek uses•• Bench scale testing resultsBench scale testing results•• Bench scale testing resultsBench scale testing results•• Reuse options 1 and 2Reuse options 1 and 2•• CostsCosts•• PermittingPermittinggg•• ScheduleSchedule

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Title 22 of Water CodeTitle 22 of Water CodeTreatment Level vs. UsesTreatment Level vs. Uses

Treatment LevelTreatment Level Approved UsesApproved Uses

Spray Irrigation of Food CropsSpray Irrigation of Food CropsDisinfected TertiaryDisinfected Tertiary Spray Irrigation of Food CropsSpray Irrigation of Food CropsLandscape IrrigationLandscape IrrigationNonrestricted Recreational Impoundment Nonrestricted Recreational Impoundment

Disinfected Tertiary Disinfected Tertiary Recycled Water Recycled Water

Surface Irrigation of Food CropsSurface Irrigation of Food CropsRestricted Recreational ImpoundmentRestricted Recreational Impoundment

Disinfected Secondary Disinfected Secondary ––2.2 Recycled Water 2.2 Recycled Water

Pasture for Milking AnimalsPasture for Milking AnimalsLandscape Irrigation (restricted)Landscape Irrigation (restricted)Landscape ImpoundmentLandscape Impoundment

Disinfected Secondary Disinfected Secondary ––23 Recycled Water 23 Recycled Water

Landscape ImpoundmentLandscape Impoundment

Surface Irrigation of Orchards and Vineyards Surface Irrigation of Orchards and Vineyards (limited harvesting)(limited harvesting)

Undisinfected SecondaryUndisinfected SecondaryRecycled WaterRecycled Water

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Fodder, Fiber and Seed Crops Fodder, Fiber and Seed Crops Recycled Water Recycled Water

Disinfected TertiaryDisinfected TertiaryyyRecycled WaterRecycled Water

Wastewater that has been Wastewater that has been adequately oxidized, coagulated, adequately oxidized, coagulated, filtered, and disinfectedfiltered, and disinfected

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Treatment Process Treatment Process vs. Proposed Usesvs. Proposed Uses

Recycle Water UseRecycle Water Use Required Treatment of Secondary EffluentRequired Treatment of Secondary EffluentTertiaryTertiaryTurf irrigation (golf Turf irrigation (golf

k )k ) Gypsum conditioning (if needed) Gypsum conditioning (if needed) courses, parks) courses, parks)

Agricultural irrigation Agricultural irrigation --(crops, cut flowers, (crops, cut flowers, or nurseries) or nurseries)

Tertiary Tertiary

TertiaryTertiaryNutrient RemovalNutrient Removal

Stream flow augmentation Stream flow augmentation PostPost--aerationaerationCoolingCooling

Groundwater recharge Groundwater recharge TertiaryTertiaryNitrification/denitrificationNitrification/denitrification

UV disinfectionUV disinfectionReverse osmosisReverse osmosis

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Coagulation/flocculationCoagulation/flocculationFiltrationFiltration

Nutrient RemovalNutrient Removal

Water Quality Guidelines Water Quality Guidelines yyfor Irrigationfor Irrigation

•• GeneralGeneralAgricultural irrigation general concernsAgricultural irrigation general concernsAgricultural irrigation general concerns Agricultural irrigation general concerns are:are:

–– salinity, sodium, excessive chlorine, nutrients, salinity, sodium, excessive chlorine, nutrients, y, , , ,y, , , ,and trace elementsand trace elements

Ions of most concern for wastewater Ions of most concern for wastewater reuse are sodium, chloride, and boronreuse are sodium, chloride, and boron

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Water Quality Guidelines Water Quality Guidelines yyfor Irrigationfor Irrigation (Cont.)(Cont.)

•• SAM EffluentSAM EffluentCompared SAM effluent to irrigation Compared SAM effluent to irrigation p gp gwater quality guidelineswater quality guidelinesAll parameters, except combined All parameters, except combined p pp pnitrogen, are considered slight nitrogen, are considered slight to moderateto moderateCombined nitrogen is considered highCombined nitrogen is considered high

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Water Quality GuidelinesWater Quality Guidelinesyyfor Creek Enhancementfor Creek Enhancement

•• Must comply with:Must comply with:Must comply with:Must comply with:Inland Surface Water, Enclosed Bays Inland Surface Water, Enclosed Bays and Estuaries Planand Estuaries Planand Estuaries Planand Estuaries Plan

–– State Implementation PlanState Implementation Plan–– California and National Toxics RuleCalifornia and National Toxics Rule

San Francisco Bay Basin PlanSan Francisco Bay Basin Plan•• Minimum standards include limits for:Minimum standards include limits for:Minimum standards include limits for:Minimum standards include limits for:

Salt, toxicity, dissolved oxygen, Salt, toxicity, dissolved oxygen, temperature ammonia metals pesticidestemperature ammonia metals pesticides

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temperature, ammonia, metals, pesticidestemperature, ammonia, metals, pesticides

SAM Bench Scale TestingSAM Bench Scale Testing

•• Purpose:Purpose: Help with tertiary preliminary Help with tertiary preliminary process type and sizingprocess type and sizingprocess type and sizingprocess type and sizing

•• Conclusions:Conclusions:SAM effluent contains high amount SAM effluent contains high amount of small particlesof small particlesLots of small particles require Lots of small particles require coagulation and flocculation coagulation and flocculation before filtrationbefore filtrationbefore filtrationbefore filtrationHigh dose of coagulant or ballasted High dose of coagulant or ballasted flocculation is probably neededflocculation is probably needed

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flocculation is probably neededflocculation is probably needed

Water Recycling OptionsWater Recycling Options

Tertiary Flow (mgd)Tertiary Flow (mgd)Tertiary Flow (mgd)Tertiary Flow (mgd)

OptionOption Name Name Summer Summer WinterWinterPlanned Type Planned Type

of Useof Use

11 Seasonal IrrigationSeasonal Irrigation 1.651.650 0

(discharge to (discharge to ocean)ocean)

IrrigationIrrigationStream Flow Stream Flow EnhancementEnhancement))

22

Seasonal Irrigation Seasonal Irrigation and year round stream and year round stream

fl t tifl t ti 3 03 0

3.0 3.0 (storage then(storage then

IrrigationIrrigation22 flow augmentationflow augmentation

"Zero discharge" "Zero discharge" through ocean outfallthrough ocean outfall

3.03.0 (storage then (storage then supplement supplement

creek)creek)Stream Flow Stream Flow EnhancementEnhancement

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Option 1 (Seasonal Irrigation) Option 1 (Seasonal Irrigation) Site SchematicSite Schematic

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Option 2 ("Zero Discharge"Option 2 ("Zero Discharge"Seasonal Irrigation and Stream FlowSeasonal Irrigation and Stream FlowSeasonal Irrigation and Stream Flow Seasonal Irrigation and Stream Flow Augmentation) Site SchematicAugmentation) Site Schematic

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Option 2 Storage TanksOption 2 Storage Tanks

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Common Facilities for Options Common Facilities for Options pp1 and 21 and 2

•• Both Options:Both Options:Revisions to secondary clarifiers Revisions to secondary clarifiers (to include equalization)(to include equalization)Secondary effluent diversion structureSecondary effluent diversion structureSecondary effluent diversion structure Secondary effluent diversion structure and pump stationand pump stationCoagulation/flocculation/filtration facilitiesCoagulation/flocculation/filtration facilitiesggUV systemUV systemChemical systems (alum, polymer, gypsum)Chemical systems (alum, polymer, gypsum)OnOn--site pipelines/conveyance/valvingsite pipelines/conveyance/valvingOnOn--site storage (converted aeration basin)site storage (converted aeration basin)R l d t t tiR l d t t ti

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Recycled water pump stationRecycled water pump station

Additional Facilities for Option 2Additional Facilities for Option 2

•• Storage tanks (2 at 3 5 MG each)Storage tanks (2 at 3 5 MG each)•• Storage tanks (2 at 3.5 MG each)Storage tanks (2 at 3.5 MG each)•• Chlorinated secondary effluent pump Chlorinated secondary effluent pump

station (15 mgd)station (15 mgd)station (15 mgd)station (15 mgd)•• Storage tank pump station (3 mgd)Storage tank pump station (3 mgd)

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Planning Level Cost SummaryPlanning Level Cost Summary

DescriptionDescription Option 1 Option 1 Option 2Option 2Project CostsProject Costs(1)(1)

(Present Worth)(Present Worth) $5,140,000$5,140,000 $14,560,000$14,560,000

Annualized Project Costs (5% over Annualized Project Costs (5% over 30 years)30 years) $335,000$335,000 $948,000$948,000

Annual O&M costsAnnual O&M costs $575 000$575 000 $1 765 000$1 765 000Annual O&M costsAnnual O&M costs $575,000$575,000 $1,765,000$1,765,000

Total Annual CostsTotal Annual Costs $910,000$910,000 $2,713,000$2,713,000

Dollars per Acre FootDollars per Acre Foot $740$740 $1,210$1,210

Note: (1) Not including offNote: (1) Not including off--site pipelines. Costs are in 2005 dollars.site pipelines. Costs are in 2005 dollars.

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Permits Required to Upgrade Permits Required to Upgrade q pgq pgWWTP to Title 22 Unrestricted UseWWTP to Title 22 Unrestricted Use

Permit TypePermit Type Agency Agency JustificationJustification

NPDESNPDES SWRCB/RWQCB/SWRCB/RWQCB/DHSDHS

Revise existing permit to Revise existing permit to include reuseinclude reuse

CEQACEQA SWRCB/RWQCBSWRCB/RWQCB Environmental complianceEnvironmental compliance

C t tiC t ti California CoastalCalifornia Coastal Construction along coastalConstruction along coastalConstructionConstruction California Coastal California Coastal CommissionCommission

Construction along coastal Construction along coastal regionregion

BuildingBuilding City City of Half Moon Bayof Half Moon Bay

Construction Construction in the Cityin the Cityof Half Moon Bayof Half Moon Bay in the Cityin the City

AirAir Bay Area AQMDBay Area AQMD Construction and OperationConstruction and Operation

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Additional Permits Required Additional Permits Required to Discharge to Pilarcitos Creek to Discharge to Pilarcitos Creek

Permit TypePermit Type AgencyAgency IssueIssuePermit TypePermit Type AgencyAgency IssueIssueCEQACEQA SWRCBSWRCB Environmental impact review and permitEnvironmental impact review and permit

Endangered Endangered S i A tS i A t

US Fish and Wildlife US Fish and Wildlife S iS i

Section 7 ConsultationSection 7 Consultationand Incidental Take Permit, and Incidental Take Permit, Species ActSpecies Act ServiceService a d c de a a e e ,a d c de a a e e ,

Biological OpinionBiological Opinion

CWACWA--Section 404 PermitSection 404 Permit US Army Corps US Army Corps of Engineersof Engineers WetlandsWetlands

CWACWA--Basin PlanBasin PlanRegional Water Quality Regional Water Quality

Control Board Control Board (RWQCB)(RWQCB)

NPDES Waste Discharge Requirements; NPDES Waste Discharge Requirements; Beneficial UseBeneficial Use

CWACWA Section 303 InlandSection 303 Inland State Water ResourcesState Water ResourcesCWACWA--Section 303 Inland Section 303 Inland Surface Water PlanSurface Water Plan

State Water Resources State Water Resources Control Board (SRWCB)Control Board (SRWCB) Water Quality CriteriaWater Quality Criteria

Fish and Game Code Fish and Game Code Section 1601Section 1601

Department of Fish and Department of Fish and Game (CDFG)Game (CDFG)

Stream Bed Alteration Stream Bed Alteration --Outfall ConstructionOutfall Construction

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Section 1601Section 1601 Game (CDFG)Game (CDFG) Outfall ConstructionOutfall Construction

ScheduleSchedule

ItemItemItemItem

•• Pilot TestingPilot Testing•• DesignDesign

3-4 months

6-8 months•• DesignDesign•• Bid/AwardBid/Award•• ConstructionConstruction 12 months

3 months

ConstructionConstruction•• PermittingPermitting•• Public InvolvementPublic Involvement

12 months

24 monthsPublic InvolvementPublic Involvement

12-18 months

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