Use Scenarios - United States Environmental Protection Agency



APPENDIX 1-7: Chlorpyrifos Scenario DevelopmentUse ScenariosCornChlorpyrifos_corn – All HUCs Application NumberApplication Timing; TypeDateMethodApplication Rate (lb a.i./A)FormulationComments1Preplant; broadcast17 days before emergenceGround1.6liquidSoil incorporation permitted at a higher application rate (3.0 lb a.i./A); however, runoff erosion is expected to be higher when application that are not incorporated; therefore, assumed highest post emergence/foliar applications; although material is incorporated to 2 inches still assumed spray drift with a 25 ft buffer2At Plant, granular7 days before emergenceGround; incorporated2.0solidSeed treatment permitted at 1.9 lb a.i./A and granular application permitted at 2.0 lb a.i./A; assumed 7 day germination to sprout; assumed no spray drift for seed/granular application; assumed granular application distributed in top 2 inches not incorporate to seed depth3Post emergence/Foliar broadcast3 days (3) after emergenceAerial1.5liquidAssumed highest post emergence/foliar application because runoff/erosion is expected to be higher when application is not incorporated (i.e., preplant and at plant applications which require incorporation); 150 ft buffer4Foliar; broadcast13 days after emergenceAerial1.5liquid5Foliar; broadcast23 days after emergenceAerial1.5liquidTotal8.1Maximum Yearly Rate PermittedCottonChlorpyrifos_cotton – HUCs 2-3, 5-8, 10-16, 18, 20-21Application NumberApplication Timing; TypeDateMethodApplication Rate (lb a.i./A)FormulationComments1At Plant; seed treatment7 days before emergenceGround, incorporated 2.2Liquid (granular seed)Apply preplant, assuming planting occurs 7 days before emergence; planting depth is not specified on the label assumed 0.5 inch (1.27 cm)2Foliar3 days post emergenceAerial1.0liquidMinimum retreatment interval for at plant is 10 days.Total3.0Maximum Yearly Rate PermittedChlorpyrifos_cottonallfoliar – HUCs 2-3, 5-8, 10-16, 18, 20-21Application NumberApplication Timing; TypeDateMethodApplication Rate (lb a.i./A)FormulationComments1Foliar1st day of wettest month that falls within reasonable application window HUC specificAerial1.0liquid2Foliar10 days after application 1Aerial1.0liquid3Foliar20 days after application 1Aerial1.0liquid14 day PHITotal3.0Maximum Yearly Rate PermittedDevelopedCommercial/Institutional/Industrial Premises/EquipmentChlorpyrifos_commercial - All HUCsApplication NumberApplication Timing; TypeDateMethodApplication Rate (lb a.i./A)FormulationComments1Soil broadcast1/1Ground1.1liquid2-12Soil broadcast7 days after previous applicationGround1.1liquidThe number of applications per year is not specified so 1 application per month is assumed. Total13.2Trash Storage AreasCommercial/Institutional/Industrial Premises/EquipmentChlorpyrifos_trash and chlorpyrifos_trash_1 - All HUCsApplication NumberApplication Timing; TypeDateMethodApplication Rate (lb a.i./A)FormulationComments1-12Direct sprayFirst day of each monthGround0.15liquidMaximum labeled rate 4.9 lb a.i./A times adjusted percent area treated of 0.03 or 3%.Total58.8Wood TreatmentChlorpyrifos_wood_1 - All HUCsApplication NumberApplication Timing; TypeDateMethodApplication Rate (lb a.i./A)FormulationComments1Direct spray1st day of wettest monthGround1.2liquid16.65 lb a.i./ 10,000 ft2 wood application over Impervious scenario (calculations provided in Section 3). Post processed results for impervious and developed scenarios to generate aggregated EECs.Total1.2Chlorpyrifos_wood - All HUCsApplication NumberApplication Timing; TypeDateMethodApplication Rate (lb a.i./A)FormulationComments1Direct spray1st day of wettest monthGround15.5liquid16.65 lb a.i./ 10,000 ft2 wood application over developed scenario (calculations provided in Section 3). Post processed results for impervious and developed scenarios to generate aggregated EECs.Total15.5Crack and Crevice/Void/General OutdoorThe application rate provided on the label(s) is given as a dilution factor (0.0424 lb/gal). In order to achieve an application rate equal to the soil broadcast application rate 26 gallons per acre would need to be applied (that is equivalent to more than 5 refills of a 5 gallon backpack sprayer). Therefore, the building scenarios is used as a representative application scenario for applications that fall into this category of crack and crevice, void and general outdoor applications.Golf Course TurfChlorpyrifos_golfcourse – All HUCsApplication NumberApplication Timing; TypeDateMethodApplication Rate (lb a.i./A)FormulationComments1Foliar1st day of wettest month HUC specificGround1.0liquid2Foliar7 days after 1st applicationGround1.0liquidTotal2.0Maximum Yearly Rate PermittedMosquito Control Chlorpyrifos_mosquito – all HUCs Application NumberApplication Timing; TypeDateMethodApplication Rate (lb a.i./A)FormulationComments1Broadcast1st day of wettest month that falls within reasonable application window HUC specificULV0.01liquid2-26Broadcast1 day after 1st applicationULV0.01liquidTotal0.26Maximum Yearly Rate PermittedNonagricultural Outdoor Buildings (foundation and walls)Chlorpyrifos_buildings and Chlorpyrifos_buildings1 – all HUCsApplication NumberApplication Timing; TypeDateMethodApplication Rate (lb a.i./A)FormulationComments1-12Building perimeter1st day of wettest monthGround1.0liquidThe number of applications per year is not specified, so assume 1 application per month. Post processed impervious and developed scenario results to generate aggregated EECs.Total12.0Nonagricultural Outdoor Buildings (perimeter)Chlorpyrifos_buildings and Chlorpyrifos_buildings1 – all HUCsApplication NumberApplication Timing; TypeDateMethodApplication Rate (lb a.i./A)FormulationComments1-12Building perimeter1st day of wettest monthGround0.13liquidThe number of applications per year is not specified, so assume 1 application per month. Maximum labeled rate 1 lb a.i./A times adjusted percent area treated of 0.13 or 13%.Total1.56Right-of-wayChlorpyrifos_rightofway – All HUCsApplication NumberApplication Timing; TypeDateMethodApplication Rate (lb a.i./A)FormulationComments1When needed1st day of wettest month HUC specificGround1.0liquidLow pressure wand2When needed7 days after 1st applicationGround1.0liquidLow pressure wandTotal2.0Maximum Yearly Rate PermittedUtilityChlorpyrifos_utility – all HUCsApplication NumberApplication Timing; TypeDateMethodApplication Rate (lb a.i./A)FormulationComments1Apply as needed1st day of wettest month that falls within reasonable application window HUC specificGround1.0GranularTotal1.0Maximum Yearly Rate PermittedWide Area UseChlorpyrifos_widearea – all HUCsApplication NumberApplication Timing; TypeDateMethodApplication Rate (lb a.i./A)FormulationComments1-12Broadcast1st day of month Ground1.0liquidMaximum applications not specified, so model one application per monthTotal12.0Maximum Yearly Rate PermittedNo Specified Land CoverNursery ConifersChlorpyrifos_conifers – all HUCs Application NumberApplication Timing; TypeDateMethodApplication Rate (lb a.i./A)FormulationComments1Foliar1st day of wettest month that falls within reasonable application window HUC specificGround1.0liquid2Foliar7 days after 1st applicationGround1.0liquid3Foliar14 days after 1st applicationGround1.0liquid7 day PHITotal3.0Maximum Yearly Rate PermittedFruit and Nut TreesChlopryifos _fruit_nut1 – all HUCsApplication NumberApplication Timing; TypeDateMethodApplication Rate (lb a.i./A)FormulationComments1Foliar1st day of wettest month that falls within reasonable application window HUC specificGround4.0liquid2Foliar, trunk drench8 days after 1st applicationGround2.0liquid14 day PHITotal6.0Maximum Yearly Rate PermittedHybrid Cottonwood/Poplar PlantationsChlorpyrifos_cottonwood2 – HUC 17Application NumberApplication Timing; TypeDateMethodApplication Rate (lb a.i./A)FormulationComments1Foliar1st day of wettest month that falls within reasonable application window HUC specificAerial2.0liquid2Foliar7 days after 1st applicationAerial2.03Foliar14 days after 1st applicationAerial2.0Total6.0Maximum Yearly Rate PermittedOrchards & VineyardsAlmondsChlorpyrifos_almonds – HUC 5, 6, 13, 14, 15, 16, 17, 18Application NumberApplication Timing; TypeDateMethodApplication Rate (lb a.i./A)FormulationComments1Dormant, orchard floor1/1Ground4.0liquidonly one dormant application in CA2Foliar1/16 (emergence date)Aerial2.0liquid3Foliar1/26Aerial2.0liquid4Foliar7/1Aerial2.0liquidPeach Twig Borer (late June-Early July; CA crop Profile)5Foliar, trunk drench8/30Ground2.5LiquidAnts (survey April-May; treat before harvest as most lost occurs at harvest) 14 days before harvestTotal14.5Maximum Yearly Rate PermittedApplesChlorpyrifos_apple – HUCs 1-6Application NumberApplication Timing; TypeDateMethodApplication Rate (lb a.i./A)FormulationComments1Dormant1st day of wettest month before emergence or after harvestAirblast2.0liquid2Foliar, trunk drench1st day of wettest month that falls within reasonable application window HUC specificGround1.5LiquidTotal3.5Maximum Yearly Rate PermittedChlorpyrifos_apple – HUCs 7-20Application NumberApplication Timing; TypeDateMethodApplication Rate (lb a.i./A)FormulationComments1Dormant1st day of wettest month before emergence or after harvestAirblast2.0liquidTotal2.0Maximum Yearly Rate PermittedCherriesTart CherriesChlorpyrifos_tartcherry - HUC 1-7, 9-11, 13-18Application NumberApplication Timing; TypeDateMethodApplication Rate (lb a.i./A)FormulationComments1Dormant1st day of wettest month before emergence or after harvestAirblast2.0liquid2Foliar1st day of wettest month that falls within reasonable application window HUC specificAirblast4.0liquid3Foliar10 days after 2nd applicationAirblast4.0liquid4Foliar20 days after 2nd applicationAirblast2.0liquid14 day PHI5Foliar, trunk drench1st day of wettest month after harvestGround2.5LiquidTotal14.5Maximum Yearly Rate PermittedSweet CherriesChlorpyrifos_sweetcherry, HUC 1-7, 9-18Application NumberApplication Timing; TypeDateMethodApplication Rate (lb a.i./A)FormulationComments1Dormant1st day of wettest month before emergence or after harvestAirblast2.0liquid2Foliar, trunk drench1st day of wettest month after harvestGround2.5LiquidTotal4.5Maximum Yearly Rate PermittedCitrusChlorpyrifos_citrus – HUC 15, 18Application NumberApplication Timing; TypeDateMethodApplication Rate (lb a.i./A)FormulationComments1Foliar1st day of wettest month that falls within reasonable application window HUC specificAirblast6.0liquid2Foliar30 days after 1st applicationAirblast1.5liquid3Foliar, orchard floor10 days after 2nd applicationGround1.0liquid4Foliar, orchard floor20 days after 2nd applicationGround1.0liquid5Foliar, orchard floor30 days after 2nd applicationGround1.0liquid28 day PHITotal10.5Maximum Yearly Rate PermittedChlorpyrifos_citrus – HUC 3, 8, 11-13, 16-17, 20-21Application NumberApplication Timing; TypeDateMethodApplication Rate (lb a.i./A)FormulationComments1Foliar1st day of wettest month that falls within reasonable application window HUC specificAirblast4.0liquid2Foliar30 days after 1st applicationAirblast3.5liquid3Foliar, orchard floor10 days after 2nd applicationGround1.0liquid4Foliar, orchard floor20 days after 2nd applicationGround1.0liquid5Foliar, orchard floor30 days after 2nd applicationGround1.0liquid28 day PHITotal10.5Maximum Yearly Rate PermittedFigsChlorpyrifos_figs, HUC 18 onlyApplication NumberApplication Timing; TypeDateMethodApplication Rate (lb a.i./A)FormulationComments1Dormant, soil app45 days (-45) before emergenceGround2.0liquid45 days before emergence (1/16 )Total2.0Maximum Yearly Rate PermittedFilberts/HazelnutsChlorpyrifos _filberts –HUCs 1-7, 10-11, 16-18, 20-21Application NumberApplication Timing; TypeDateMethodApplication Rate (lb a.i./A)FormulationComments1Dormant1st day of wettest month before emergence or after harvestAerial2.0liquid2Foliar1st day of wettest month that falls within reasonable application window HUC specificAerial2.0liquid3Foliar10 days after 2nd applicationAerial2.0liquid4Foliar20 days after 2nd applicationAerial2.0liquid14 day PHITotal8.0Maximum Yearly Rate PermittedChlorpyrifos _fruit_nut2 – all HUCsApplication NumberApplication Timing; TypeDateMethodApplication Rate (lb a.i./A)FormulationComments1Foliar1st day of wettest month that falls within reasonable application window HUC specificGround4.0liquid2Foliar, trunk drench8 days after 1st applicationGround2.0liquid14 day PHITotal6.0Maximum Yearly Rate PermittedGrapes Chlorpyrifos_grapes – HUC 1-13Application NumberApplication Timing; TypeDateMethodApplication Rate (lb a.i./A)FormulationComments1Foliar1st day of wettest month that falls within reasonable application window HUC specificGround2.25liquidFor HUC 2 12b 2nd westest month was used due to PHI.Total2.25Maximum Yearly Rate PermittedChlorpyrifos_grapes1 – HUC 10, 11, 13Application NumberApplication Timing; TypeDateMethodApplication Rate (lb a.i./A)FormulationComments1Dormant1st day of wettest month that falls within reasonable application window HUC specificGround2.0liquidFor HUC 2 13 2nd westest month was used due to PHI.2Foliar1st day of wettest month that falls within reasonable application window HUC specificGround2.25liquidTotal4.25Maximum Yearly Rate PermittedChlorpyrifos_grapes2 – HUC 14, 16, 17, 20-21Application NumberApplication Timing; TypeDateMethodApplication Rate (lb a.i./A)FormulationComments1Foliar1st day of wettest month that falls within reasonable application window HUC specificGround2.25liquidTotal2.25Maximum Yearly Rate PermittedChlorpyrifos_grapes3 – HUC 18Application NumberApplication Timing; TypeDateMethodApplication Rate (lb a.i./A)FormulationComments1Foliar1st day of wettest month that falls within reasonable application window HUC specificGround1.0liquid2Foliar3 days after 1st applicationGround1.03Foliar6 days after 1st applicationGround1.04Foliar7 days after harvestGround2.0liquid35 day PHITotal5.0Maximum Yearly Rate PermittedNectarineChlorpyrfios_nectarine – HUC 1-8, 10-11, 13-18, 20-21Application NumberApplication Timing; TypeDateMethodApplication Rate (lb a.i./A)FormulationComments1Dormant1st day of wettest month before emergence or after harvestAirblast3.0liquid2Preplant foliar8 days (-8) before emergenceGround2.5liquidHandgun or low pressureTotal5.5Maximum Yearly Rate PermittedPeachChlorpyrifos_peach - HUCs 1-2, 4-18, 20-21Application NumberApplication Timing; TypeDateMethodApplication Rate (lb a.i./A)FormulationComments1Dormant1st day of wettest month before emergence or after harvestAirblast3.0liquid2Preplant foliar8 days before emergenceAirblast2.5liquidApply preplant, assuming planting occurs 7 days before emergenceTotal5.5Maximum Yearly Rate PermittedChlorpyrifos_peach - HUC 3Application NumberApplication Timing; TypeDateMethodApplication Rate (lb a.i./A)FormulationComments1Dormant1st day of wettest month before emergence or after harvestAirblast3.0liquid2Preplant foliar8 days before emergenceAirblast2.5liquidApply preplant, assuming planting occurs 7 days before emergence3Postharvest7 days after harvestAirblast2.5liquidTotal8.0Maximum Yearly Rate PermittedPear Chlorpyrifos_pear - HUCs 17, 18Application NumberApplication Timing; TypeDateMethodApplication Rate (lb a.i./A)FormulationComments1Dormant1st day of wettest month before emergence or after harvestAirblast2.0liquid2Postharvest7 days after harvestAirblast2.0liquidTotal4.0Maximum Yearly Rate PermittedPlum/PrunesChlorpyrifos_plumprune – HUCs 2-18, 20, 21 Application NumberApplication Timing; TypeDateMethodApplication Rate (lb a.i./A)FormulationComments1Dormant1st day of wettest month before emergence or after harvestAirblast2.0liquid2Foliar, trunk drench1st day of wettest month that falls within reasonable application window HUC specificGround2.5liquidTotal4.5Maximum Yearly Rate PermittedPecansChlorpyrifos_pecans – 2-8, 10-18, 20-21Application NumberApplication Timing; TypeDateMethodApplication Rate (lb a.i./A)FormulationComments1Dormant1st day of wettest month before emergence or after harvestAirblast2.0liquid2Foliar1st day of wettest month that falls within reasonable application window HUC specificAirblast4.3liquid3Foliar10 days after 2nd applicationAirblast2.0liquid4Foliar20 days after 2nd applicationGround4.3LiquidApplication to orchard floor14 day PHITotal12.6Maximum Yearly Rate PermittedPineappleChlorpyrifos_pineapple – HUC 20Application NumberApplication Timing; TypeDateMethodApplication Rate (lb a.i./A)FormulationComments1Postplant1st day of wettest month that falls within reasonable application window HUC specificGround2.0liquid2Postplant30 days after 1st applicationGround2.0liquid3Postplant60 days after 1st applicationGround2.0liquidTotal6.0Maximum Yearly Rate PermittedSeed Orchard TreesChlopryrifos_seedtree – all HUCsApplication NumberApplication Timing; TypeDateMethodApplication Rate (lb a.i./A)FormulationComments1Foliar1st day of wettest month that falls within reasonable application window HUC specificGround1.0liquid2Foliar7 days after 1st applicationGround1.0liquid3Foliar14 days after 1st applicationGround1.0liquid4Foliar21 days after 1st applicationAirblast2.5liquid30 day PHI5Foliar, stump7 days after harvestGround0.3liquidLow pressure sprayerTotal5.8Maximum Yearly Rate PermittedWalnutChlopryrifos_walnut – 1-7, 10-18, 20-21Application NumberApplication Timing; TypeDateMethodApplication Rate (lb a.i./A)FormulationComments1Dormant1st day of wettest month that falls before emergence or after harvestAerial2.0liquid2Foliar1st day of wettest month that falls within reasonable application window HUC specificAerial2.0liquid3Foliar10 days after 2nd applicationAerial2.0liquid4Foliar, orchard floor20 days after 2nd applicationGround4.0liquid14 day PHITotal10.0Maximum Yearly Rate PermittedOther CropsCloverClover Grown for Seed Chlorpyrifos_clover – HUC 17 onlyApplication NumberApplication Timing; TypeDateMethodApplication Rate (lb a.i./A)FormulationComments1Preplant8 days before emergentGround1.9liquidApply preplant, assuming planting occurs 7 days before emergenceTotal1.9Maximum Yearly Rate PermittedChlorpyrifos_clover1 – HUC 17 onlyApplication NumberApplication Timing; TypeDateMethodApplication Rate (lb a.i./A)FormulationComments1FoliarApplication occurs 1st day of wettest monthAerial1.9liquidTotal1.9Maximum Yearly Rate PermittedOther GrainsSorghumChlorpyrifos_sorghum – All HUCsApplication NumberApplication Timing; TypeDateMethodApplication Rate (lb a.i./A)FormulationComments1Preplant17 days before emergenceGround1.5granularApply preplant, assuming planting occurs 7 days before emergence In furrow drench10 day RTI2At Plant7 days before emergenceGround0.01liquidApply at plant, assuming planting occurs 7 days before emergence 3Foliar1st day of wettest month that falls within reasonable application window HUC specificAerial1.0liquid4Foliar10 days after 3rd applicationAerial0.5liquid30 day PHITotal3.01Maximum Yearly Rate PermittedTriticaleChlorpyrifos_triticale – HUC 1-14, 16-18Application NumberApplication Timing; TypeDateMethodApplication Rate (lb a.i./A)FormulationComments1At plant, seed treatment7 days before emergenceGround0.003liquidApply at plant, assuming planting occurs 7 days before emergence; assumes planting depth of 1 inchTotal0.003Maximum Yearly Rate PermittedOther Row CropsBeetsBeets Grown For SeedChlorpyrifos_beets – HUC 17, based on app rate allowed in Idaho (application are only permitted in Oregon and Idaho)Application NumberApplication Timing; TypeDateMethodApplication Rate (lb a.i./A)FormulationComments1At plant, soil incorporated band 7 days before emergenceGround0.9liquidAssume planting occurs 7 days prior to emergence and product is incorporated to 2 inches (5.08 cm)2preplant (fall)180 days post emergenceGround1.9Total2.8Maximum Yearly Rate PermittedChlorpyrifos_beets – HUC 17, based on app rate allowed in OR. Apps only in OR and IDApplication NumberApplication Timing; TypeDateMethodApplication Rate (lb a.i./A)FormulationComments1At plant, soil incorporated band7 days before emergenceGround1.9liquidAssume planting occurs 7 days prior to emergenceTotal1.9Maximum Yearly Rate PermittedPeanutChlopryrifos_peanut – HUCs 2-3, 6, 8, 11-13, 18Application NumberApplication Timing; TypeDateMethodApplication Rate (lb a.i./A)FormulationComments1Preplant 8 days before emergenceAerial2.0liquidApply preplant, assuming planting occurs 7 days before emergence2At pegging23 days post emergenceAerial2.0liquidAssume pegging occurs 23a days after emergence (BEAD) Total4.0Maximum Yearly Rate PermittedPeanut plants start flowering 25-40 days after planting; peg is visible about a week after fertilization. BeetChlorpyrifos_sugarbeet – HUCs 1, 2, 4, 7, 9, 10, 11, 13-18, 20-21Application NumberApplication Timing; TypeDateMethodApplication Rate (lb a.i./A)FormulationComments1Postemergence, Broadcast1st day of wettest month that falls within reasonable application window HUC specificAerial1.0liquid2Postemergence, Broadcast10 days after 1st applicationAerial1.0liquid3Postemergence, Broadcast20 days after 1st applicationAerial1.0liquid30 day PHITotal3.0Maximum Yearly Rate PermittedChlorpyrifos_sugarbeet – HUCs 1, 2, 4, 7, 9, 10, 11, 13-18, 20-21Application NumberApplication Timing; TypeDateMethodApplication Rate (lb a.i./A)FormulationComments1Postemergence, Broadcast1st day of wettest month that falls within reasonable application window HUC specificGround2.0granular2Postemergence, Broadcast10 days after 1st applicationAerial1.0liquid3Postemergence, Broadcast20 days after 1st applicationAerial1.0liquid30 day PHITotal4.0Maximum Yearly Rate PermittedSunflowerChlorpyrifos_sunflower – HUC 1-12, 14, 17-21Application NumberApplication Timing; TypeDateMethodApplication Rate (lb a.i./A)FormulationComments1At Plant7 days prior to emergenceAerial2.0liquidApply at plant, assuming planting occurs 7 days before emergence 2Foliar1st day of wettest month that falls within reasonable application window HUC specificAerial1.5liquid3Foliar10 days after 2nd applicationAerial1.5liquid42 day PHITotal5.0Maximum Yearly Rate PermittedTobacco Chlorpyrifos_tobacco – HUC 1-8Application NumberApplication Timing; TypeDateMethodApplication Rate (lb a.i./A)FormulationComments1Preplant8 days before emergenceAerial2.0liquidApply preplant, assuming planting occurs 7 days before emergence Total2.0Maximum Yearly Rate PermittedGrasslandOrnamental Lawns and Turf, Sod Chlorpyrifos_sod – all HUCsApplication NumberApplication Timing; TypeDateMethodApplication Rate (lb a.i./A)FormulationComments1Foliar1st day of wettest month that falls within reasonable application window HUC specificGround3.76liquid2Foliar3 days after 1st applicationGround3.76liquidTotal7.52Maximum Yearly Rate PermittedOther TreesChristmas Tree PlantationsChlorpyrifos_christmas_tree – HUC 1-8, 10-12, 15-18Application NumberApplication Timing; TypeDateMethodApplication Rate (lb a.i./A)FormulationComments1Foliar1st day of wettest month that falls within reasonable application window HUC specificAirblast1.0liquid2Foliar7 days after 1st applicationAirblast1.0liquid3Foliar14 days after 1st applicationAirblast1.0liquid4Foliar, trunk drench12/1Ground2.5LiquidPostharvestTotal5.5Maximum Yearly Rate PermittedConifers, PlantationChlorpyrifos_conifer1 – all HUCsApplication NumberApplication Timing; TypeDateMethodApplication Rate (lb a.i./A)FormulationComments1Foliar1st day of wettest month that falls within reasonable application window HUC specificGround1.0liquid2Foliar7 days after 1st applicationGround1.0liquid3Foliar14 days after 1st applicationGround1.0liquid7 day PHITotal3.0Maximum Yearly Rate PermittedForest Forest PlantingsChlopyrifos_forestplantings – all HUCsApplication NumberApplication Timing; TypeDateMethodApplication Rate (lb a.i./A)FormulationComments1Foliar1st day of wettest month that falls within reasonable application window HUC specificGround1.0liquid2Foliar7 days after 1st applicationGround1.0liquid3Foliar14 days after 1st applicationGround1.0liquid4Foliar21 days after 1st applicationGround1.0liquid5Foliar28 days after 1st applicationGround1.0liquid6Foliar35 days after 1st applicationGround1.0liquidTotal6.0Maximum Yearly Rate PermittedForest TreesChlorpyrifos_foresttrees –all HUCsApplication NumberApplication Timing; TypeDateMethodApplication Rate (lb a.i./A)FormulationComments1Foliar, stump1st day of wettest month that falls within reasonable application window HUC specificGround3.6liquidTotal3.6Maximum Yearly Rate PermittedHybrid Cottonwood/Poplar PlantationsChlorpyrifos_cottonwood1 – HUC 17Application NumberApplication Timing; TypeDateMethodApplication Rate (lb a.i./A)FormulationComments1Foliar1st day of wettest month that falls within reasonable application window HUC specificAerial2.0liquid2Foliar7 days after 1st applicationAerial2.03Foliar14 days after 1st applicationAerial2.0Total6.0Maximum Yearly Rate PermittedPasture-HayAlfalfaChlorpyrifos_alfalfa1 – MO (HUC 7, 8, 10, 11)Application NumberApplication Timing; TypeDateMethodApplication Rate (lb a.i./A)FormulationComments1At plant10 days before emergenceGround1.0liquid1 application at plant, assumed to be 10 days prior to emergence2Foliar1st day of wettest month that falls within reasonable application window HUC specificAerial1.0liquid3Foliar10 days after 2nd appAerial1.0liquid4Foliar20 days after 2nd appAerial1.0liquid5Foliar30 days after 2nd appAerial1.0Liquid21 day Preharvest intervalTotal5.0Maximum Yearly Rate PermittedChlorpyrifos_alfalfa – All HUCsApplication NumberApplication Timing; TypeDateMethodApplication Rate (lb a.i./A)FormulationComments1Foliar1st day of wettest month that falls within reasonable application window HUC specificAerial1.0liquid2Foliar10 days after 1st appAerial1.0liquid3Foliar20 days after 1st appAerial1.0liquid4Foliar30 days after 2nd appAerial1.0Liquid21 day PHITotal4.0Maximum Yearly Rate PermittedGrass Forage/Fodder/Hay Chlorpyrifos_grass_hay– HUCs 15-18Application NumberApplication Timing; TypeDateMethodApplication Rate (lb a.i./A)FormulationComments1Foliar1st day of wettest month that falls within reasonable application window HUC specificAerial1.0liquid2Foliar3 days after 1st applicationAerial1.03Foliar6 days after 1st applicationAerial1.0Total3.0Maximum Yearly Rate PermittedSoybeanChlorpyrifos_soybean - HUCsApplication NumberApplication Timing; TypeDateMethodApplication Rate (lb a.i./A)FormulationComments1At Plant, soil band7 days before emergenceGround2.2solidApply at plant, assuming planting occurs 7 days before emergence 2Foliar, broadcast3 post emergenceAerial0.8liquid10 day RTITotal3.0Maximum Yearly Rate PermittedChlorpyrifos_soybean_allfoliarApplication NumberApplication Timing; TypeDateMethodApplication Rate (lb a.i./A)FormulationComments1Foliar1st day of wettest month that falls within reasonable application window HUC specificAerial1.0liquid2Foliar15th of wettest month that falls within reasonable application window HUC specificAerial1.0liquid3Foliar29th of wettest month that falls within reasonable application window HUC specificAerial1.0liquid28 day PHITotal3.0Maximum Yearly Rate PermittedFor HUC 2 Region 4 the wettest month within the reasonable application window is august; however, applications would extend beyond the PHI so the month was adjust back 1 to july the 2nd wettest month within the application windowFor HUC 2 Region 17a the wettest month within a reasonable application window is May. This the same month as emergence. First application is assumed to occur on the emergence date.Vegetable & Ground FruitAsparagusChlorpyrifos_asparagus – All HUCs except 21Application NumberApplication Timing; TypeDateMethodApplication Rate (lb a.i./A)FormulationComments1Foliar, preharvest1st day of wettest month that falls within reasonable application window HUC specificAerial1.0liquid2Foliar, postharvest1st day of wettest month after harvestAerial1.0liquid3Foliar, postharvest10 days after 2nd applicationAerial1.0liquidTotal3.0Maximum Yearly Rate PermittedChlorpyrifos_asparagus1 –HUCs 10-18Application NumberApplication Timing; TypeDateMethodApplication Rate (lb a.i./A)FormulationComments1Foliar, postharvest1st day of wettest month after harvestGround 1.5granular2Foliar, postharvest10 days after 2nd applicationGround 1.5granularTotal3.0Maximum Yearly Rate PermittedBeansChlorpyrifos_beans1 – HUC 17Application NumberApplication Timing; TypeDateMethodApplication Rate (lb a.i./A)FormulationComments1Seed treatment7 days before emergenceGround, seed treatment (granular)0.348liquidAssume planting occurs 7 days prior to emergence.Planting depth is not specified on the label assumed 1 inch min incorporation depthTotal0.348Maximum Yearly Rate PermittedChlorpyrifos_beans – all HUCs except 21Application NumberApplication Timing; TypeDateMethodApplication Rate (lb a.i./A)FormulationComments1Seed treatment7 days before emergenceGround, seed treatment (granular)0.272liquidAssume planting occurs 7 days prior to emergence.Planting depth is not specified on the label assumed 1 inch (1.27 cm) min incorporation depthTotal0.272Maximum Yearly Rate PermittedCarrotCarrot Grown for SeedChlorpyrifos_carrot – HUC 17Application NumberApplication Timing; TypeDateMethodApplication Rate (lb a.i./A)FormulationComments1Foliar, prebloom1st day of wettest month that falls within reasonable application window HUC specificAerial0.94liquidTotal0.94Maximum Yearly Rate PermittedCole Crops Excluding Cauliflower and Brussels SproutsChlopyrifos_colecrops – all HUCs except 21Application NumberApplication Timing; TypeDateMethodApplication Rate (lb a.i./A)FormulationComments1Preplant8 days before emergenceGround2.0liquidApply preplant, assuming planting occurs 7 days before emergence2Postplant2 post emergenceGround2.0liquid10 day RTI3Foliar1st day of wettest month that falls within reasonable application window HUC specificAerial1.0liquid4Foliar10 days after 3rd applicationAerial1.0liquid5Foliar20 days after 3rd applicationAerial1.0liquid6Foliar30 days after 3rd applicationAerial1.0liquid21 day PHITotal8.0Maximum Yearly Rate PermittedBrussel Sprouts, CauliflowerChlorpyrifos_ cauliflower – all HUCs except 21Application NumberApplication Timing; TypeDateMethodApplication Rate (lb a.i./A)FormulationComments1Postplant6 days before emergenceGround2.25liquidAssume planting occurs 7 days before emergence2Foliar1st day of wettest month that falls within reasonable application window HUC specificAerial1.0liquid3Foliar10 days after 2nd applicationAerial1.0liquid4Foliar20 days after 2nd applicationAerial1.0liquid21 day PHITotal5.25Maximum Yearly Rate PermittedCranberryChlorpyrifos_cranberry – 1-2, 4, 7, 17Application NumberApplication Timing; TypeDateMethodApplication Rate (lb a.i./A)FormulationComments1Foliar1st day of wettest month that falls within reasonable application window HUC specificAerial1.5liquid2Foliar10 days after 1st applicationAerial1.5liquidTotal3.0Maximum Yearly Rate PermittedCucumberChlorpyrifos_cucumber – 1-14, 16-18, 20Application NumberApplication Timing; TypeDateMethodApplication Rate (lb a.i./A)FormulationComments1Seed treatment7 days before emergenceGround, seed treatment (granular)0.4liquidApply at plant, assuming planting occurs 7 days before emergence; assumed 2 inch minimum planting depthTotal0.4Maximum Yearly Rate PermittedGinseng Chlorpyrifos_ginseng– HUCs 4, 7Application NumberApplication Timing; TypeDateMethodApplication Rate (lb a.i./A)FormulationComments1Preplant8 days before emergenceGround2.0liquidApply preplant, assuming planting occurs 7 days before emergenceIncorporate to 4”Total2.0Maximum Yearly Rate PermittedLegume VegetablesChlorpyrifos_legume – All HUCs except 21Application NumberApplication Timing; TypeDateMethodApplication Rate (lb a.i./A)FormulationComments1At plant7 days before emergenceAerial1.0liquidApply at plant, assuming planting occurs 7 days before emergenceTotal1.0Maximum Yearly Rate PermittedMint/Spearmint/PeppermintChlorpyrifos_mint – HUC 1, 4-5, 7, 9-10, 17 Application NumberApplication Timing; TypeDateMethodApplication Rate (lb a.i./A)FormulationComments1Foliar, preplant8 days before emergenceGround2.0liquid2Foliar, postemergence2 days post emergenceGround2.0liquidRTI of 10 daysTotal4.0Maximum Yearly Rate PermittedOnionsChlorpyrifos_onion – all HUCs except 21Application NumberApplication Timing; TypeDateMethodApplication Rate (lb a.i./A)FormulationComments1At plant7 days before emergenceGround1.0liquidApply at plant, assuming planting occurs 7 days before emergence2Postplant2 post emergenceGround1.0liquidRetreatment interval of 10 days2 inch (5.08 cm) incorporationTotal2.0Maximum Yearly Rate PermittedChlorpyrifos_onion_bo – HUC 3Application NumberApplication Timing; TypeDateMethodApplication Rate (lb a.i./A)FormulationComments1Postplant (bulb onion)6 days before emergenceGround1.0liquid2 inch (5.08 cm) incorporationTotal1.0Peas Seed treatmentChlorpyrifos_peaseed – All HUcsApplication NumberApplication Timing; TypeDateMethodApplication Rate (lb a.i./A)FormulationComments1At plant, seed treatment7 days before emergenceGround, seed treatment (graunular)0.30liquidApply at plant, assuming planting occurs 7 days before emergence; assumed 1 inch minimum planting depthTotal0.30Maximum Yearly Rate PermittedPepperChlorpyrifos_pepper – HUC 3Application NumberApplication Timing; TypeDateMethodApplication Rate (lb a.i./A)FormulationComments1Foliar1st day of wettest month that falls within reasonable application window HUC specificGround1.0liquid2Foliar10 days after 1st applicationGround1.0liquid3Foliar20 days after 1st applicationGround1.0liquid4Foliar30 days after 1st applicationGround1.0liquid5Foliar40 days after 1st applicationGround1.0liquid6Foliar50 days after 1st applicationGround1.0liquid7Foliar60 days after 1st applicationGround1.0liquid8Foliar70 days after 1st applicationGround1.0liquid7 day PHITotal8.0Maximum Yearly Rate PermittedRadishChlorpyrifos_radish – HUC 17Application NumberApplication Timing; TypeDateMethodApplication Rate (lb a.i./A)FormulationComments1At plant or in furrow drench; first crop cycle7 days before emergenceGround3.0liquidApply at plant, assuming planting occurs 7 days before emergence – no information on required incorporation is provided2At plant or in furrow drench; second crop cycle23 post emergenceGround3.0liquidApply at plant, assuming planting occurs 7 days before emergence – no information on required incorporation is provided; assumes crop are harvest and replanted in 30 from previous planting.3At plant or in furrow drench; third crop cycle53 post emergenceGround3.0liquid4At plant or in furrow drench; third crop cycle63 post emergenceGround3.0liquid5Foliar93 post emergenceGround1.0liquid30 day RTITotal13.0Maximum Yearly Rate PermittedChlorpyrifos_radish – other HUCsApplication NumberApplication Timing; TypeDateMethodApplication Rate (lb a.i./A)FormulationComments1At plant or in furrow drench; first crop cycle7 days before emergenceGround3.0liquidApply at plant, assuming planting occurs 7 days before emergence – no information on required incorporation is provided2At plant or in furrow drench; second crop cycle23 post emergenceGround3.0liquidApply at plant, assuming planting occurs 7 days before emergence – no information on required incorporation is provided; assumes crop are harvest and replanted in 30 from previous planting.3At plant or in furrow drench; third crop cycle53 post emergenceGround3.0liquid4At plant or in furrow drench; third crop cycle63 post emergenceGround3.0liquidTotal12.0Maximum Yearly Rate PermittedPumpkinChlorpyrifos_pumpkin –all HUCsApplication NumberApplication Timing; TypeDateMethodApplication Rate (lb a.i./A)FormulationComments1At plant7 days before emergenceGround0.30liquidApply at plant, assuming planting occurs 7 days before emergenceTotal0.30Maximum Yearly Rate PermittedRutabagaChlorpyrifos_rutabaga – HUC 18Application NumberApplication Timing; TypeDateMethodApplication Rate (lb a.i./A)FormulationComments1Preplant18 days before emergenceGround2.4liquid10 day RTI2Preplant8 days before emergenceGround2.4liquidApply preplant, assuming planting occurs 7 days before emergence In furrow drenchTotal4.8Maximum Yearly Rate PermittedRutabaga – 20-21Application NumberApplication Timing; TypeDateMethodApplication Rate (lb a.i./A)FormulationComments1Preplant27 days before emergenceGround2.4liquidPreplant, with 10 day RTI2Preplant17 days before emergenceGround2.4liquidPreplant, with 10 day RTI3At plant7 days before emergenceGround2.4liquidApply at plant, assuming planting occurs 7 days before emergence In furrow drench4Postplant3 post emergenceGround2.4liquid10 day RTIIn furrow drenchTotal9.6Maximum Yearly Rate PermittedStrawberryChlorpyrifos_strawberry1 – HUC 3 (Mississippi)Application NumberApplication Timing; TypeDateMethodApplication Rate (lb a.i./A)FormulationComments1Postharvest7 days after harvestAerial1.0liquid2Postharvest21 days after 1st applicationAerial1.0liquid14 day RTITotal2.0Maximum Yearly Rate PermittedChlorpyrifos_strawberry – HUCs 1-7, 17-18Application NumberApplication Timing; TypeDateMethodApplication Rate (lb a.i./A)FormulationComments1Preplant8 days before emergenceAerial2.0liquid2Foliar1st day of wettest month that falls within reasonable application window HUC specificAerial1.0liquid3Foliar10 days after 2nd applicationAerial1.0liquid21 day PHITotal4.0Maximum Yearly Rate PermittedSweet Potato Chlorpyrifos_sweetpotato – HUC 1-8, 11, 12, 13, 15, 18Application NumberApplication Timing; TypeDateMethodApplication Rate (lb a.i./A)FormulationComments1Preplant8 days before emergenceAerial2.0liquidApply preplant, assuming planting occurs 7 days before emergence Total2.0Maximum Yearly Rate PermittedChlorpyrifos_sweetpotato1 – HUC 3, 6, 8Application NumberApplication Timing; TypeDateMethodApplication Rate (lb a.i./A)FormulationComments1Preplant8 days before emergenceGround2.1liquidApply preplant, assuming planting occurs 7 days before emergence Total2.1Maximum Yearly Rate PermittedTurnipChlorpyrifos_turnip – HUC 1-8, 11, 15-18, 20-21Application NumberApplication Timing; TypeDateMethodApplication Rate (lb a.i./A)FormulationComments1Preplant8 days prior to emergenceGround2.3GranularApply preplant, assuming planting occurs 7 days before emergenceIncorporate 2 “ 2Postplant1st day of wettest month that falls within reasonable application window HUC specificGround2.3GranularIncorporate 2 “30 day PHITotal4.6Maximum Yearly Rate PermittedWheat Chlorpyrifos_wheat – HUCs 1-18Application NumberApplication Timing; TypeDateMethodApplication Rate (lb a.i./A)FormulationComments1At plant7 days before emergenceGround0.003liquidApply at plant, assuming planting occurs 7 days before emergence2Foliar1st day of wettest month that falls within reasonable application window HUC specificAerial1.0liquid3Foliar7 days after 2nd applicationAerial1.0liquid14 day PHITotal2.003Maximum Yearly Rate PermittedNon-specified Landcover Nursery StockChlorpyrifos_nursery2 – all HUCsApplication NumberApplication Timing; TypeDateMethodApplication Rate (lb a.i./A)FormulationComments1Preplant foliar8 days before emergenceGround4.0liquidApply preplant, assuming planting occurs 7 days before emergenceTotal4.0Maximum Yearly Rate PermittedOrnamental/Shade Trees Chlorpyrifos_shadetrees – all HUCsApplication NumberApplication Timing; TypeDateMethodApplication Rate (lb a.i./A)FormulationComments1Foliar1st day of wettest month that falls within reasonable application window HUC specificGround2.0liquid2Dormant1st day of wettest month before emergence or after harvestGround3.0liquidApplied via hand wandTotal5.0Maximum Yearly Rate PermittedOrnamental Nonflowering PlantsOther ornamental applications including Ornamental Grasses, Sod (pg. PAGEREF _Ref426959091 \h 21) and Ornamental/Shade Trees (pg. PAGEREF _Ref426959092 \h 35) are assumed to be protective of this chlorpyrifos use. Therefore, these scenarios were used as surrogates for this use pattern.Ornamental Woody ShrubsChlorpyrifos_shrubs – all HUCsApplication NumberApplication Timing; TypeDateMethodApplication Rate (lb a.i./A)FormulationComments1Foliar, preharvest1st day of wettest month that falls after harvestGround6.0liquidTotal6.0Maximum Yearly Rate PermittedPRZM SCENARIO EMERGENCE AND HARVEST DATES HUC2CornCottonDevelopedGrasslandEmergenceHarvestEmergenceHarvestEmergenceHarvestEmergenceHarvest11-Jun4-Sep1-Sep2-Nov1-Jun30-Aug21-Oct16-Apr1-Jun1-Nov1-Sep2-Nov1-Apr1-Nov325-Apr17-Sep1-May22-Sep1-Sep2-Nov1-Apr28-Aug41-Jun4-Sep1-Sep2-Nov1-Apr1-Nov51-May25-Oct1-May22-Sep1-Sep2-Nov1-Jun30-Aug625-Apr17-Sep1-May22-Sep1-Sep2-Nov1-Apr28-Aug71-May20-Oct1-May22-Sep1-Sep2-Nov1-Jun30-Aug810-Apr2-Sep1-May22-Sep1-Sep2-Nov1-Sep1-Aug95-May12-Aug1-Sep2-Nov1-Jun30-Aug10a10-May20-Oct16-Mar15-Oct1-Sep2-Nov1-Jun30-Aug10b10-May20-Oct16-Mar15-Oct1-Sep2-Nov1-Jun30-Aug11a25-May20-Oct16-Mar15-Oct1-Sep2-Nov1-Sep1-Aug11b25-May20-Oct16-Mar15-Oct1-Sep2-Nov1-Sep1-Aug12a1-Mar1-Jul16-Mar15-Oct1-Sep2-Nov1-Sep1-Aug12b1-Mar1-Jul16-Mar15-Oct1-Sep2-Nov1-Sep1-Aug1316-Mar10-Sep16-Mar15-Oct1-Sep2-Nov1-Sep1-Aug1416-Mar10-Sep16-Mar15-Oct1-Sep2-Nov1-Sep1-Aug15a16-Mar10-Sep1-May11-Nov1-Sep2-Nov1-Sep1-Aug15b16-Mar10-Sep1-May11-Nov1-Sep2-Nov1-Sep1-Aug16a16-Mar10-Sep16-Mar15-Oct1-Sep2-Nov1-Sep1-Aug16b16-Mar10-Sep16-Mar15-Oct1-Sep2-Nov1-Sep1-Aug17a16-May10-Sep1-Sep2-Nov1-Sep1-Jul17b16-May10-Sep1-Sep2-Nov1-Sep1-Jul18a1-Apr8-Sep16-Mar15-Oct1-Sep2-Nov1-Nov1-May18b1-Apr8-Sep16-Mar15-Oct1-Sep2-Nov1-Nov1-May20a1-Oct16-Apr1-Sep2-Nov2-Jan15-Dec20b1-Oct16-Apr1-Sep2-Nov2-Jan15-Dec211-Oct16-Apr1-Sep2-NovHUC2NSLandcoverOrchardOtherGrainOtherRowEmergenceHarvestEmergenceHarvestEmergenceHarvestEmergenceHarvest11-Jan31-Dec1-Jun15-Oct16-Apr1-Nov1-Jun5-Oct21-Jan31-Dec16-Apr15-Oct16-Apr1-Nov1-May21-Jul31-Jan31-Dec1-Jan31-Dec1-Jan31-Dec16-May10-Oct41-Jan31-Dec1-Jun15-Oct1-Jun30-Aug30-Apr15-Aug51-Jan31-Dec16-Apr15-Oct20-May1-Oct16-May10-Oct616-Mar22-Oct1-Apr25-Oct1-Apr28-Aug25-Apr17-Sep716-Mar22-Oct1-Jan31-Dec1-Jun30-Aug1-May20-Oct81-Jan31-Dec1-Jan31-Dec1-Jan31-Dec10-Apr31-Jul91-Jan31-Dec1-Jun15-Oct16-May25-Aug16-May15-Oct10a16-Mar22-Oct1-Mar10-Nov20-May1-Oct10-May20-Oct10b16-Mar22-Oct1-Mar10-Nov20-May1-Oct10-May20-Oct11a16-Mar22-Oct1-Apr16-Nov16-Oct17-Jun25-May20-Oct11b16-Mar22-Oct1-Apr16-Nov16-Oct17-Jun25-May20-Oct12a1-Jan31-Dec1-Apr16-Nov1-Jun30-Aug1-Mar1-Jul12b1-Jan31-Dec1-Apr16-Nov1-Jun30-Aug1-Mar1-Jul131-Jan31-Dec1-Apr16-Nov1-Jun30-Aug1-Mar1-Jul1416-Mar22-Oct1-Apr16-Nov1-Jun30-Aug1-Mar1-Jul15a1-Jan31-Dec1-Jan31-Dec1-Jun30-Aug1-Mar1-Jul15b1-Jan31-Dec1-Jan31-Dec1-Jun30-Aug1-Mar1-Jul16a1-Mar1-Nov1-Jan31-Dec1-Jun30-Aug1-Mar1-Jul16b1-Mar1-Nov1-Jan31-Dec1-Jun30-Aug1-Mar1-Jul17a1-Jan31-Dec1-Apr31-Oct1-Sep1-Jul1-Apr1-Sep17b1-Jan31-Dec1-Apr31-Oct1-Sep1-Jul1-Apr1-Sep18a1-Mar1-Nov16-Jan13-Sep1-Jan15-Jun1-Jan8-Apr18b1-Mar1-Nov16-Jan13-Sep1-Jan15-Jun1-Jan8-Apr20a1-Jan31-Dec1-Jan31-Dec1-Jan31-Dec1-Jan1-May20b1-Jan31-Dec1-Jan31-Dec1-Jan31-Dec1-Jan1-May211-Jan31-Dec1-Jan31-DecHUC2OtherTreeSoybeanVegetableWheatEmergenceHarvestEmergenceHarvestEmergenceHarvestEmergenceHarvest11-Jun15-Oct1-Jun4-Sep1-Jun5-Oct16-Apr1-Nov216-Apr15-Oct16-Apr1-Oct10-May10-Oct16-Apr1-Nov31-Jan31-Dec25-Apr17-Sep1-Jan1-May1-Apr28-Aug41-May21-Jul1-Jun4-Sep30-Apr15-Aug16-May5-Aug516-Apr15-Oct1-May25-Oct1-Jun4-Sep20-May1-Oct61-Apr25-Oct25-Apr17-Sep1-Jan1-May1-Apr28-Aug71-Jan31-Dec1-May20-Oct16-Jun2-Sep1-Jun30-Aug81-Jan31-Dec10-Apr2-Sep10-Apr31-Jul1-Jun30-Aug91-May21-Jul5-May12-Aug16-May15-Oct16-May5-Aug10a1-Jan31-Dec10-May20-Oct16-May15-Oct16-May5-Aug10b1-Jan31-Dec10-May20-Oct16-May15-Oct16-May5-Aug11a1-Jan31-Dec25-May20-Oct1-Feb7-May16-Oct17-Jun11b1-Jan31-Dec25-May20-Oct1-Feb7-May16-Oct17-Jun12a1-Apr16-Nov1-Mar1-Jul1-Feb7-May1-Jun30-Aug12b1-Apr16-Nov1-Mar1-Jul1-Feb7-May1-Jun30-Aug131-Apr16-Nov16-Mar10-Sep1-Feb7-May1-Jun30-Aug141-Apr16-Nov16-Mar10-Sep1-Feb7-May1-Jun30-Aug15a1-Jan31-Dec16-Mar10-Sep16-Feb12-May1-Jun30-Aug15b1-Jan31-Dec16-Mar10-Sep16-Feb12-May1-Jun30-Aug16a1-Jan31-Dec16-Mar10-Sep1-Feb7-May1-Jun30-Aug16b1-Jan31-Dec16-Mar10-Sep1-Feb7-May1-Jun30-Aug17a1-Jan31-Dec16-May10-Sep16-Jun2-Sep1-Sep1-Jul17b1-Jan31-Dec16-May10-Sep16-Jun2-Sep1-Sep1-Jul18a16-Jan13-Sep1-Apr8-Sep1-Feb7-May1-Jan15-Jun18b16-Jan13-Sep1-Apr8-Sep1-Feb7-May1-Jan15-Jun20a1-Jan31-Dec1-Feb15-May20b1-Jan31-Dec1-Feb15-May211-Jan31-Dec1-Feb15-MayWETTEST MONTHS (CUMULATIVE PRECIPITATION) FOR THE PRZM METROLOGICAL DATA HUC2Wettest Month2nd3rd4th5th6th7th15111249682751083693372112544847965355376411863712152676875941087812241596758941010a659784310b5649103711a51143106911b6875910412a5104963712b9568107413987106121114549763815a7831221915b1283972116a435101211916b11126453117a121112310417b53411121618a121131241018b131221141020a41131225120b1211110234211151089127 ................
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