FACTSHEET (Pursuant to NAC 445A.236)

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FACTSHEET (Pursuant to NAC 445A.236) FACTSHEET (pursuant to NAC 445A.236) Permittee Name: CARICO FARMS, INC. P.O. BOX 18160 RENO, NV 89511 Permit Number: NS2008511 Permit Type: GROUNDWATER DISCHARGE Designation: GROUNDWATER New/Existing: EXISTING Location: CARICO FARMS, INC., PERSHING 685 PETERSON RD., LOVELOCK, NV 89419 LATITUDE: 40.07022760, LONGITUDE: ­118.487912 TOWNSHIP: 25N, RANGE: 31E, SECTION: 3 Outfall / Well Num Outfall / Well Name Location Type Well Log Num Latitude Longitude Receiving Water 001 GREASE TRAP MATERIAL External Outfall 40.07022760 ­118.487912 GROUNDWATER MW1 MONITORING WELL 1 Monitoring Well 40.060681 ­118.493233 GROUNDWATER MW2 MONITORING WELL 2 Monitoring Well 40.060637 ­118.489220 GROUNDWATER Permit History/Description of Proposed Action This permit is a renewal. The Permittee land applies aqueous fluids and associated solids from treated grease trap material for use as a soil amendment and nutrient source on nutrient deficient agricultural land. This permit was originally issued on October 1, 2008 under the permit number NEV2008511. The permit subsequently underwent a major modification and renewal so it was reissued on October 11, 2011. The permit has been administratively continued since October of 2016. The Permittee is proposing to continue to land apply treated grease trap material to an 80­acre portion of Carico Farms, Inc. Aqueous fluids and associated solids from treated grease trap material are incorporated into nutrient deficient soils as an amendment. Facility Overview Carico Farms Inc. is a 320­acre facility located in Lovelock, Pershing County, Nevada. Under this permit, treated grease trap materials may be applied to an 80­acre portion of the facility. Carico Farms Inc. is located within an agricultural region south of Lovelock. The Permittee proposes to continue to land apply aqueous fluids and associated solids from treated grease trap material for use as a soil amendment and nutrient source on nutrient­deficient agricultural land. The grease trap material is provided by Waters Septic Tank Service d.b.a. Waters Vacuum Truck Service. The grease trap material is treated on­site using a process approved by NDEP in 2008. Fats, oils, and greases (FOG) from the grease trap material extracted during the treatment process are used on­site for power generation and have the potential for use as feedstock for biofuel production. The aqueous fluids and associated solids from treated grease trap material will be applied as fertilizer and soil amendment for beneficial use on portions of nutrient deficient agricultural land at Carico Farms, Inc. 901 S. Stewart Street, Suite 4001 • Carson City, Nevada 89701­5249 • p: 775.687.4670 • f: 775.687.5856 • ndep.nv.gov Page 1 / 13 Carico Farms, Inc. farmland is flood irrigated. Treated grease trap materials are directly incorporated into the land application fields. The aqueous fluids and associated solids from treated grease trap material applied are screened to remove solids over 5/16­inch in size before the material can be land applied. The application rate of treated grease trap material will be based on the nitrogen needs of the crop to be planted. To reapply grease trap material to cropland, the crop must first be harvested, unless reapplication is used for growing a cover crop during drought years for soil amendment. Grazing does not meet this requirement. The Permittee proposes to continue to use its 40,000­gallon holding capacity at the beneficial use site to store the aqueous fluids and associated solids from treated grease trap material. Holding tanks shall be inspected daily and have tank level indicators. Tanks are equipped with one­inch ball valves on the tank inlets to facilitate mixing and sample collection. Prior to entering the tanks, grease trap material is screened. Oversize material will be removed to a covered and lined dumpster for holding until disposal at an approved landfill. The dumpster will be dosed with lime for odor control and vector attraction reduction. Application of domestic septage, portable toilet fluid, and additional grease trap material at the facility is permitted under the permit NS2004504. Outfall Summary Outfall 001­ Outfall 001 is the discharge point of the holding tanks for the treated grease trap material. This discharge point is before the treated grease trap material is discharged into the equipment used for applying the material to the fields. Outfall MW1­ Outfall MW1 is a downgradient monitoring well on the south end of the land used for grease trap application. Of the two monitoring wells, it is the westerly one. This outfall is used to determine the depth to groundwater and collect water quality samples. Outfall MW2­ Outfall MW2 is a downgradient monitoring well on the south end of the land used for grease trap application. Of the two monitoring wells, it is the easterly one. This outfall is used to determine the depth to groundwater and collect water quality samples. Effluent Characterization Treated grease trap materials are incorporated into the land application fields and incorporated into the soil. The aqueous fluids and associated solids from treated grease trap material applied are screened to remove solids over 5/16­inch in size before the material can be land applied. Treated grease trap material and associated solids are discharged into equipment that applies it to the nutrient deficient fields. From 2011 to 2020, the average gallons of treated grease trap material applied per year was approximately 1,655,620 with an average per month application rate of 137,968 gallons. Effluent limitations are monitor and report. Pollutants of Concern The pollutants of concern are nitrogen, sulfate, fluoride, iron, and oil & grease. These pollutants are monitored at Outfall 001 as Monitor and Report. Monitoring requirements for these constituents are carried over from the previous permit. At Outfalls MW1 and MW2, nitrogen and fluoride are monitored. Nitrogen has a discharge limit of 10 mg/L. Receiving Water The receiving water is groundwater. Groundwater in the area may be influenced by various agricultural practices. The groundwater is reported to be at a depth of approximately 8 feet below ground surface in the Permittee’s on­site water level monitoring well. Results from Profile I analytical analysis of the monitoring well water sample from the original permit application indicate poor quality, with exceedances of Profile I maximum concentration levels (MCL) for Aluminum, Chloride, Fluoride, Iron, Manganese, Sulfate, and Total Dissolved Solids (TDS). Continued groundwater quality monitoring shall be required for the aqueous fluids and associated solids from the application of treated grease trap material at the site. Compliance History The Permittee was out of compliance for Nitrogen twice since the issuance of the last permit. Nitrogen has a limit of 10 mg/L. The non­compliance was recorded in first quarter of 2020 for monitoring well 2 and in the third quarter of 2018 for monitoring well 2 (Outfall MW2) with a maximum exceedance of 21.5 mg/L. Analysis of monitoring data indicates these exceedances are outliers and not indicative of a trend of increasing nitrogen in the groundwater. The Permittee failed to sample outfall 001 for the first three quarters of 2016. Outfalls HT1­4 were not sampled in the third quarter of 2016. The Permittee failed to sample outfall 001 all four quarters of 2015. The Permittee failed to sample outfall 001 in the third quarter of 2013. Proposed Effluent Limitations The discharge shall be limited and monitored by the Permittee as specified below: Groundwater Monitoring Wells Table for Sample Location Mw1 (Monitoring Well) To Be Reported Quarterly Discharge Limitations Monitoring Requirements Sample Measurement Sample Parameter Base Quantity Concentration Monitoring Loc Loc Frequency Type Water level relative Daily M&R Feet Groundwater MW1 Monthly VISUAL to mean sea level Maximum (ft) Monitoring well Daily M&R Feet level from the Groundwater MW1 Monthly VISUAL Minimum (ft) surface Groundwater Monitoring Wells Table for Sample Location Mw1 (Monitoring Well) To Be Reported Quarterly Discharge Limitations Monitoring Requirements Sample Measurement Sample Parameter Base Quantity Concentration Monitoring Loc Loc Frequency Type M&R Fluoride, total (as Daily Milligrams Groundwater MW1 Quarterly DISCRT F) Maximum per Liter (mg/L) <= 10 Daily Milligrams Nitrogen, total Groundwater MW1 Quarterly DISCRT Maximum per Liter (mg/L) Groundwater Monitoring Wells Table for Sample Location Mw2 (Monitoring Well) To Be Reported Quarterly Discharge Limitations Monitoring Requirements Sample Measurement Sample Parameter Base Quantity Concentration Monitoring Loc Loc Frequency Type Water level relative Daily M&R Feet Groundwater MW2 Monthly VISUAL to mean sea level Maximum (ft) Monitoring well Daily M&R Feet level from the Groundwater MW2 Monthly VISUAL Minimum (ft) surface Groundwater Monitoring Wells Table for Sample Location Mw2 (Monitoring Well) To Be Reported Quarterly Discharge Limitations Monitoring Requirements Sample Measurement Sample Parameter Base Quantity Concentration Monitoring Loc Loc Frequency Type M&R Fluoride, total (as Daily Milligrams Groundwater MW2 Quarterly DISCRT F) Maximum per Liter (mg/L) <= 10 Daily Milligrams Nitrogen, total Groundwater MW2 Quarterly DISCRT Maximum per Liter (mg/L) Septage Limitations / Requirements for Sample Location 001 (External Outfall­Grease Trap Material Effluent) To Be Reported Quarterly Discharge Limitations Monitoring Requirements Sample Measurement Sample Parameter Base Quantity
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