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HomeMy WebLinkAbout1905-COMPOST-Data-FY16-17TEL: 831-724-5422 FAX: 831-724-3188 www.compostlab.com Account #: 7060976-1/3-7372 Group: Jun17E #6 Reporting Date: Brooks Contractor 1195 Beal Rd. Goldston, NC 27252 Attn: Amy Brooks Date Received: 27 Jun. 17 Sample Identification: BR-1 Sample ID #: 7060976 - 1/3 Nutrients Dry wt. As Rcvd. units Stability Indicator:Biologically Total Nitrogen:1.0 0.75 %CO2 Evolution Respirometery Available C Ammonia (NH4-N):690 490 mg/kg mg CO2-C/g OM/day 1.9 2.0 Nitrate (NO3-N):16 12 mg/kg mg CO2-C/g TS/day 0.49 0.51 Org. Nitrogen (Org.-N):0.93 0.66 % Stability Rating very stable very stable Phosphorus (as P2O5):0.55 0.39 % Phosphorus (P):2400 1700 mg/kg Potassium (as K2O):0.26 0.18 %Maturity Indicator: Cucumber Bioassay Potassium (K):2100 1500 mg/kg Compost:Vermiculite(v:v) 1:2 Calcium (Ca):17 12 % Emergence (%) 93 Magnesium (Mg):0.29 0.21 % Seedling Vigor (%) 75 Sulfate (SO4-S):220 160 mg/kg Description of Plants Boron (Total B):6.4 4.6 mg/kg Moisture:0 28.5 % Sodium (Na):0.11 0.082 %Pathogens Results Units Rating Chloride (Cl):0.11 0.081 % Fecal Coliform < 7.5 MPN/g pass pH Value:NA 8.61 unit Salmonella < 3 MPN/4g pass Bulk Density :36 50 lb/cu ft Date Tested: 27 Jun. 17 Carbonates (CaCO3):830 590 lb/ton Conductivity (EC5):2.1 NA mmhos/cm Organic Matter:25.7 18.3 %Inerts % by weight Organic Carbon:12.0 8.4 % Plastic < 0.5 Ash:74.3 53.1 % Glass < 0.5 C/N Ratio 11 11 ratio Metal < 0.5 AgIndex 8 8 ratio Sharps ND Metals Dry wt. EPA Limit units Size Distribution Aluminum (Al): 4900 - mg/kg MM % by weight Arsenic (As): 2.4 41 mg/kg > 50 0.0 Cadmium (Cd): < 1.0 39 mg/kg 25 to 50 0.0 Chromium (Cr): 9.9 1200 mg/kg 16 to 25 0.0 Cobalt (Co) 2.5 - mg/kg 9.5 to 16 0.3 Copper (Cu): 15 1500 mg/kg 6.3 to 9.5 1.3 Iron (Fe): 7200 - mg/kg 4.0 to 6.3 3.5 Lead (Pb): 6.2 300 mg/kg 2.0 to 4.0 10.3 Manganese (Mn): 190 - mg/kg < 2.0 84.6 Mercury (Hg): < 1.0 17 mg/kg Molybdenum (Mo): < 1.0 75 mg/kg Nickel (Ni): 4.4 420 mg/kg Analyst: Assaf Sadeh Selenium (Se): < 1.0 36 mg/kg Zinc (Zn): 64 2800 mg/kg *Sample was received and handled in accordance with TMECC procedures. July 26, 2017 Account No.: Date Received 27 Jun. 17 7060976 - 1/3 - 7372 Sample i.d. Group: Sample I.d. No. 1/3 7060976 INTERPRETATION:Page one of three Is Your Compost Stable? Respiration Rate Biodegradation Rate of Your Pile 1.9 mg CO2-C/ g OM/day Biologically Available Carbon (BAC)Optimum Degradation Rate 2.0 mg CO2-C/ g OM/day Is Your Compost Mature? 43 Ratio Ammonia N ppm 690 mg/kg dry wt. Nitrate N ppm 16 mg/kg dry wt. pH value 8.61 units Cucumber Emergence 93.3 percent Is Your Compost Safe Regarding Health? Fecal Coliform < 1000 MPN/g dry wt. Salmonella Less than 3 /4g dry wt. Metals US EPA 503 Pass dry wt. Does Your Compost Provide Nutrients or Organic Matter? Nutrients (N+P2O5+K2O) 1.8 Percent dry wt. AgIndex (Nutrients / Sodium and Chloride Salts)((N+P2O5+K2O) / (Na + Cl)) 8 Ratio Plant Available Nitrogen (PAN)Estimated release for first season 2 lbs/ton wet wt. C/N Ratio 11 Ratio Soluble Available Nutrients & Salts (EC5 w/w dw) 2.1 mmhos/cm dry wt. Lime Content (CaCO3) 830 Lbs/ton dry wt. What are the physical properties of your compost? Percent Ash 74.3 Percent ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ dry wt. Sieve Size % > 6.3 MM (0.25") 1.6 Percent dry wt. < Stable >|<Moderately Unstable>|< Unstable >|< High For Mulch AmmoniaN/NitrateN ratio ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ BR-1 +++++++ < Stable >|<Moderately Unstable>|< Unstable >|< High For Mulch +++++++ VeryMature>|< Mature >|< Immature +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ VeryMature>|< Mature >|< Immature ++++++++++++ < Immature >|< Mature ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ < Immature >|< Mature >|< Immature +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ < Immature >|< Mature +++++++ < Safe >|< High Fecal Coliform +++++++ <Safe (none detected) >|< High Salmonella Count(> 3 per 4 grams) +++++++++ <All Metals Pass >|< One or more Metals Fail +++++++++++++++++++++ ++++++++++++++ <Low >|< Average >|< High Nutrient Content +++++++++++++++++++++++++++++++++++++++++++ Na & Cl >|< Nutrient and Sodium and Chloride Provider >|< Nutrient Provider < Low >|< Average >|< High Lime Content (as CaCO3) < High Organic Matter >|< Average >|< High Ash Content ++++++++++++ All Uses >|< Size May Restrict Uses for Potting mix and Golf Courses Low Nitrogen Provider>|< Average Nitrogen Provider >|<High Nitrogen Provider Jun17E No. 6 < Nitrogen Release >|< N-Neutral >|< N-Demand>|< High Nitrogen Demand +++++++++++ SloRelease>|< Average Nutrient Release Rate >|<High Available Nutrients ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ +++++++++ Account No.: Date Received 7060976 - 1/3 - 7372 Sample i.d. Group: Sample I.d. No. 1/3 7060976 INTERPRETATION: Is Your Compost Stable?Page two of three Respiration Rate 1.9 Low: Good for all uses mg CO2-C/g OM/day The respiration rate is a measurement of the biodegradation rate of the organic matter in the sample (as received). The respiration rate is determined by measuring the rate at which CO2 is released under optimized moisture and temperature conditions. Biologically Available Carbon 2.0 Low: Good for all uses mg CO2-C/g OM/day Biologically Available Carbon (BAC) is a measurement of the rate at which CO2 is released under optimized moisture, temperature, porosity, nutrients, pH and microbial conditions. If both the RR and the BAC test values are close to the same value, the pile is optimized for composting. If both values are high the compost pile just needs more time. If both values are low the compost has stabilized and should be moved to curing. BAC test values that are higher than RR indicate that the compost pile has stalled. This could be due to anaerobic conditions, lack of available nitrogen due to excessive air converting ammonia to the unavailable nitrate form, lack of nitrogen or other nutrients due to poor choice of feedstock, pH value out of range, or microbes rendered non-active. Is Your Compost Mature? AmmoniaN:NitrateN ratio 43 immature Composting to stabilize carbon can occur at such a rapid rate that sometimes phytotoxins remain in the compost and must be neutralized before using in high concentrations or in high-end uses. This Ammonia N ppm step is called curing. Typically ammonia is in excess with the break-down of organic materials resulting 690 immature in an increase in pH. This combination results in a loss of volatile ammonia (it smells). Once this toxic Nitrate N ppm ammonia has been reduced and the pH drops, the microbes convert the ammonia to nitrates. A low 16 immature ammonia + high nitrate score is indicative of a mature compost, however there are many exceptions. pH value For example, a compost with a low pH (<7) will retain ammonia, while a compost with high lime content 8.61 immature can lose ammonia before the organic fraction becomes stable. Composts must first be stable before curing indicators apply. Cucumber Bioassay 93.3 Percent Cucumbers are chosen for this test because they are salt tolerant and very sensitive to ammonia and organic acid toxicity. Therefore, we can germinate seeds in high concentrations of compost to measure phytotoxic effects without soluble salts being the limiting factor. Values above 80% for both percent emergence and vigor are indicative of a well-cured compost. Exceptions include very high salts that affect the cucumbers, excessive concentrations of nitrates and other nutrients that will be in range when formulated to make a growing media. Is Your Compost Safe Regarding Health? Fecal Coliform < 1000 / g dry wt. Fecal coliforms can survive in both aerobic and anaerobic conditions and is common in all initial compost piles. Most human pathogens occur from fecal matter and all fecal matter is loaded in fecal coliforms. Therefore fecal coliforms are used as an indicator to determine if the chosen method for pathogen reduction (heat for compost) has met the requirements of sufficient temperature, time and mixing. If the fecal coliforms are reduced to below 1000 per gram dry wt. it is assumed all others pathogens are eliminated. Potential problems are that fecal coliform can regrow during the curing phase or during shipping. This is because the conditions are now more favorable for growth than during the composting process. Salmonella Bacteria Less than 3 3 / 4g dry wt. Salmonella is not only another indicator organism but also a toxic microbe. It has been used in the case of biosolids industry to determine adequate pathogen reduction. Metals Pass The ten heavy metals listed in the EPA 503 regulations are chosen to determine if compost can be applied to ag land and handled without toxic effects. Most high concentrations of heavy metals are derived from woodwaste feedstock such as chrome-arsenic treated or lead painted demolition wood. Biosolids are rarely a problem. Does Your Compost Provide Nutrients or Organic Matter? Nutrients (N+P2O5+K2O) 1.8 low nutrient content This value is the sum of the primary nutrients Nitrogen, Phosphorus and Potassium. Reported units are consistent with those found on fertilizer formulations. A sum greater than 5 is indicative of a compost with high nutrient content, and best used to supply nutrients to a receiving soil. A sum below 2 indicates low nutrient content, and is best-used to improve soil structure via the addition of organic matter. Most compost falls between 2 and 5. BR-1 27 Jun. 17 Jun17E No. 6 Account No.: Date Received 7060976 - 1/3 - 7372 Sample i.d. Group: Sample I.d. No. 1/3 7060976 INTERPRETATION:Page three of three AgIndex (Nutrients/Na+Cl) 8 Average nutrient ratio Composts with low AgIndex values have high concentrations of sodium and/or chloride compared to nutrients. Repeated use of a compost with a low AgIndex (< 2) may result in sodium and/or chloride acting as the limiting factor compared to nutrients, governing application rates. These composts may be used on well-draining soils and/or with salt-tolerant plants. Additional nutrients form another source may be needed if the application rate is limited by sodium or chloride. If the AgIndex is above 10, nutrients optimal for plant growth will be available without concern of sodium and/or chloride toxicity. Composts with an AgIndex of above 10 are good for increasing nutrient levels for all soils. Most composts score between 2 and 10. Concentrations of nutrients, sodium, and chloride in the receiving soil should be considered when determining compost application rates. The AgIndex is a product of feedstock quality. Feedstock from dairy manure, marine waste, industrial wastes, and halophytic plants are likely to produce a finished compost with a low AgIndex. Plant Available Nitrogen (lbs/ton) 2 Low N Provider Plant Available Nitrogen (PAN) is calculated by estimating the release rate of Nitrogen from the organic fraction of the compost. This estimate is based on information gathered from the BAC test and measured ammonia and nitrate values. Despite the PAN value of the compost, additional sources of Nitrogen may be needed during he growing season to off- set the Nitrogen demand of the microbes present in the compost. With ample nutrients these microbes can further breakdown organic matter in the compost and release bound Nitrogen. Nitrogen demand based on a high C/N ratio is not considered in the PAN calculation because additional Nitrogen should always be supplemented to the receiving soil when composts with a high C/N ratio are applied. C/N Ratio 11 Indicates maturity As a guiding principal, a C/N ratio below 14 indicates maturity and above 14 indicates immaturity, however, there are many exceptions. Large woodchips (>6.3mm), bark, and redwood are slow to breakdown and therefore can result in a relatively stable product while the C/N ratio value is high. Additionally, some composts with chicken manure and/or green grass feedstocks can start with a C/N ratio below 15 and are very unstable. A C/N ratio below 10 supplies Nitrogen, while a ratio above 20 can deplete Nitrogen from the soil. The rate at which Nitrogen will be released or used by the microbes is indicated by the respiration rate (BAC). If the respiration rate is too high the transfer of Nitrogen will not be controlable. Soluble Nutrients & Salts (EC5 w/w dw - mmhos/cm) 2.1 Average salts This value refers to all soluble ions including nutrients, sodium, chloride and some soluble organic compounds. The concentration of salts will change due to the release of salts from the organic matter as it degrades, volatilization of ammonia, decomposition of soluble organics, and conversion of molecular structure. High salts + high AgIndex is indicative of a compost high in readily available nutrients. The application rate of these composts should be limited by the optimum nutrient value based on soil analysis of the receiving soil. High Salts + low AgIndex is indicative of a compost low in nutrients with high concentrations of sodium and/or chloride. Limit the application rate according to the toxicity level of thesodium and/or chloride. Low salts indicates that the compost can be applied without risking salt toxicity, is likely a good source of organic matter, and that nutrients will release slowly over time. Lime Content (lbs. per ton) 830 High lime content Compost high in lime or carbonates are often those produced from chicken manure (layers) ash materials, and lime products. These are excellent products to use on a receiving soil where lime has been recommended by soil analysis to raise the pH. Composts with a high lime content should be closely considered for pH requirements when formulating potting mixes. Physical Properties Percent Ash 74.3 High ash content Ash is the non-organic fraction of a compost. Most composts contain approximately 50% ash (dry weight basis). Compost can be high in ash content for many reasons including: excess minerilzation(old compost), contamination with soil base material during turning, poor quality feedstock, and soil or mineral products added. Finding the source and reducing high ash content is often the fastest means to increasing nutrient quality of a compost. Particle Size % > 6.3 MM (0.25") 1.6 May restrict use Large particles may restrict use for potting soils, golf course topdressings, seed-starter mixes, and where a fine size distribution is required. Composts with large particles can still be used as excellent additions to field soils, shrub mixes and mulches. Particle Size Distribution Each size fraction is measured by weight, volume and bulk density. These results are particularly relevent with decisions to screen or not, and if screening, which size screen to use. The bulk density indicates if the fraction screened is made of light weight organic material or heavy mineral material. Removing large mineral material can greatly improve compost quality by increasing nutrient and organic concentrations. Appendix: Estimated available nutrients for use when calculating application rates Plant Available Nitrogen (PAN) calculations: lbs/ton (As Rcvd.) PAN = (X * (organic N)) + ((NH4-N) + (NO3-N)) X value = If BAC < 2 then X = 0.1 Plant Available Nitrogen (PAN) 2.4 If BAC =2.1 to 5 then X = 0.2 Ammonia (NH4-N) 0.98 If BAC =5.1 to 10 then X = 0.3 Nitrate (NO3-N) 0.02 If BAC > 10 then X = 0.4 Available Phosphorus (P2O5*0.64) 4.9 Note: If C/N ratio > 15 additional N should be applied. Available Potassium (K2O) 3.6 27 Jun. 17 BR-1 Jun17E No. 6 TEL: 831-724-5422 FAX: 831-724-3188 www.compostlab.com Account #: 7060976-1/3-7372 Group: Jun17E #6 Reporting Date: Brooks Contractor 1195 Beal Rd. Attn: Amy Brooks Date Received: 27 Jun. 17 Sample Identification: BR-1 Sample ID #: 7060976 - 1/3 Metals Results Units MDL % Recovery Date Tested Arsenic (As): 2.4 mg/kg dw 1.0 95.9 05 Jul. 17 Cadmium (Cd): Less than 1.0 mg/kg dw 1.0 94.0 05 Jul. 17 Chromium (Cr): 9.9 mg/kg dw 1.0 95.6 05 Jul. 17 Copper (Cu): 15 mg/kg dw 1.0 89.9 05 Jul. 17 Lead (Pb): 6.2 mg/kg dw 1.0 91.9 05 Jul. 17 Mercury (Hg): Less than 1.0 mg/kg dw 1.0 100.8 05 Jul. 17 Molybdenum (Mo): Less than 1.0 mg/kg dw 1.0 86.2 05 Jul. 17 Nickel (Ni): 4.4 mg/kg dw 1.0 97.2 05 Jul. 17 Selenium (Se): Less than 1.0 mg/kg dw 1.0 88.5 05 Jul. 17 Zinc (Zn): 64 mg/kg dw 1.0 99.5 05 Jul. 17 Cobalt (Co) 2.5 mg/kg dw 0.50 98.0 05 Jul. 17 Total Solids (TMECC 03.09) 72 % 0.05 NA 30 Jun. 17 Bacteria Results Units MDL Date Tested Fecal Coliform Less than 7.5 MPN/g dw 7.5 27 Jun. 17 Salmonella Less than 3 MPN/4g dw 3 27 Jun. 17 Pollutant Loading Rate: Multiply mg/kg dry weight values times 0.0715 to give you kilograms pollutant per 100 metric ton compost as-received based on a moisture content of 28.5 percent. Method (metals): EPA 3050B / EPA 6010 Method (metals): TMECC 04.12-B / 04.14-A Method (Mercury Hg) TMECC 04.06 / EPA 7471 Method (Fecal Coliform): Standard Methods 9221E Method (Salmonella): TMECC 07.02-A Analyst: Assaf Sadeh Goldston, NC 27252 July 26, 2017 Metals & Bacteria TEL: 831-724-5422 FAX: 831-724-3188 www.compostlab.com Account #: 6100124-1/2-7372 Group: Oct16A #12 Reporting Date: Brooks Contractor 1195 Beal Rd. Goldston, NC 27252 Attn: Amy Brooks Date Received: 05 Oct. 16 Sample Identification: BR-1 Sample ID #: 6100124 - 1/2 Nutrients Dry wt. As Rcvd. units Stability Indicator:Biologically Total Nitrogen:0.98 0.58 %CO2 Evolution Respirometery Available C Ammonia (NH4-N):560 330 mg/kg mg CO2-C/g OM/day 1.8 3.1 Nitrate (NO3-N):41 24 mg/kg mg CO2-C/g TS/day 0.53 0.92 Org. Nitrogen (Org.-N):0.92 0.55 % Stability Rating very stable stable Phosphorus (as P2O5):0.57 0.34 % Phosphorus (P):2500 1500 mg/kg Potassium (as K2O):0.28 0.17 %Maturity Indicator: Cucumber Bioassay Potassium (K):2300 1400 mg/kg Compost:Vermiculite(v:v) 1:2 Calcium (Ca):16 9.6 % Emergence (%) 100 Magnesium (Mg):0.31 0.18 % Seedling Vigor (%) 115 Sulfate (SO4-S):150 89 mg/kg Description of Plants healthy Boron (Total B):6.8 4.1 mg/kg Moisture:0 40.5 % Sodium (Na):0.11 0.065 %Pathogens Results Units Rating Chloride (Cl):0.063 0.037 % Fecal Coliform 19 MPN/g pass pH Value:NA 8.50 unit Salmonella < 3 MPN/4g pass Bulk Density :31 53 lb/cu ft Date Tested: 05 Oct. 16 Carbonates (CaCO3):710 420 lb/ton Conductivity (EC5):2.3 NA mmhos/cm Organic Matter:30.0 17.9 %Inerts % by weight Organic Carbon:15.0 8.7 % Plastic < 0.5 Ash:70.0 41.7 % Glass 0.16 C/N Ratio 15 15 ratio Metal < 0.5 AgIndex > 10 > 10 ratio Sharps ND Metals Dry wt. EPA Limit units Size Distribution Aluminum (Al): 3500 - mg/kg MM % by weight Arsenic (As): 3.1 41 mg/kg > 50 0.0 Cadmium (Cd): < 1.0 39 mg/kg 25 to 50 0.0 Chromium (Cr): 8.6 1200 mg/kg 16 to 25 0.0 Cobalt (Co) 3.2 - mg/kg 9.5 to 16 0.1 Copper (Cu): 21 1500 mg/kg 6.3 to 9.5 3.4 Iron (Fe): 8300 - mg/kg 4.0 to 6.3 7.5 Lead (Pb): 8.4 300 mg/kg 2.0 to 4.0 22.9 Manganese (Mn): 230 - mg/kg < 2.0 66.2 Mercury (Hg): < 1.0 17 mg/kg Molybdenum (Mo): < 1.0 75 mg/kg Nickel (Ni): 4.6 420 mg/kg Analyst: Assaf Sadeh Selenium (Se): < 1.0 36 mg/kg Zinc (Zn): 73 2800 mg/kg *Sample was received and handled in accordance with TMECC procedures. October 20, 2016 Account No.: Date Received 05 Oct. 16 6100124 - 1/2 - 7372 Sample i.d. Group: Sample I.d. No. 1/2 6100124 INTERPRETATION:Page one of three Is Your Compost Stable? Respiration Rate Biodegradation Rate of Your Pile 1.8 mg CO2-C/ g OM/day Biologically Available Carbon (BAC)Optimum Degradation Rate 3.1 mg CO2-C/ g OM/day Is Your Compost Mature? 14 Ratio Ammonia N ppm 560 mg/kg dry wt. Nitrate N ppm 41 mg/kg dry wt. pH value 8.50 units Cucumber Emergence 100.0 percent Is Your Compost Safe Regarding Health? Fecal Coliform < 1000 MPN/g dry wt. Salmonella Less than 3 /4g dry wt. Metals US EPA 503 Pass dry wt. Does Your Compost Provide Nutrients or Organic Matter? Nutrients (N+P2O5+K2O) 1.8 Percent dry wt. AgIndex (Nutrients / Sodium and Chloride Salts)((N+P2O5+K2O) / (Na + Cl)) 11 Ratio Plant Available Nitrogen (PAN)Estimated release for first season 3 lbs/ton wet wt. C/N Ratio 15 Ratio Soluble Available Nutrients & Salts (EC5 w/w dw) 2.3 mmhos/cm dry wt. Lime Content (CaCO3) 710 Lbs/ton dry wt. What are the physical properties of your compost? Percent Ash 70.0 Percent +++++++++++++++++++++++++++++++++++++++++++++++++++++++ dry wt. Sieve Size % > 6.3 MM (0.25") 3.5 Percent dry wt. Oct16A No. 12 < Nitrogen Release >|< N-Neutral >|< N-Demand>|< High Nitrogen Demand ++++++++++++ SloRelease>|< Average Nutrient Release Rate >|<High Available Nutrients ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ +++++++++++ < Low >|< Average >|< High Lime Content (as CaCO3) < High Organic Matter >|< Average >|< High Ash Content +++++++++++++++++++++++++++ All Uses >|< Size May Restrict Uses for Potting mix and Golf Courses Low Nitrogen Provider>|< Average Nitrogen Provider >|<High Nitrogen Provider +++++++ <Safe (none detected) >|< High Salmonella Count(> 3 per 4 grams) +++++++++ <All Metals Pass >|< One or more Metals Fail +++++++++++++++++++++++++++++ ++++++++++++++ <Low >|< Average >|< High Nutrient Content +++++++++++++++++++++++++++++++++++++++++++++++++++++++ Na & Cl >|< Nutrient and Sodium and Chloride Provider >|< Nutrient Provider < Immature >|< Mature >|< Immature +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ < Immature >|< Mature +++++++ < Safe >|< High Fecal Coliform VeryMature>|< Mature >|< Immature +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ VeryMature>|< Mature >|< Immature ++++++++++++++++++++++++++++++++ < Immature >|< Mature +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ < Stable >|<Moderately Unstable>|< Unstable >|< High For Mulch AmmoniaN/NitrateN ratio ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ BR-1 +++++++ < Stable >|<Moderately Unstable>|< Unstable >|< High For Mulch ++++++++++++ Account No.: Date Received 6100124 - 1/2 - 7372 Sample i.d. Group: Sample I.d. No. 1/2 6100124 INTERPRETATION: Is Your Compost Stable?Page two of three Respiration Rate 1.8 Low: Good for all uses mg CO2-C/g OM/day The respiration rate is a measurement of the biodegradation rate of the organic matter in the sample (as received). The respiration rate is determined by measuring the rate at which CO2 is released under optimized moisture and temperature conditions. Biologically Available Carbon 3.1 Low: Good for all uses mg CO2-C/g OM/day Biologically Available Carbon (BAC) is a measurement of the rate at which CO2 is released under optimized moisture, temperature, porosity, nutrients, pH and microbial conditions. If both the RR and the BAC test values are close to the same value, the pile is optimized for composting. If both values are high the compost pile just needs more time. If both values are low the compost has stabilized and should be moved to curing. BAC test values that are higher than RR indicate that the compost pile has stalled. This could be due to anaerobic conditions, lack of available nitrogen due to excessive air converting ammonia to the unavailable nitrate form, lack of nitrogen or other nutrients due to poor choice of feedstock, pH value out of range, or microbes rendered non-active. Is Your Compost Mature? AmmoniaN:NitrateN ratio 14 immature Composting to stabilize carbon can occur at such a rapid rate that sometimes phytotoxins remain in the compost and must be neutralized before using in high concentrations or in high-end uses. This Ammonia N ppm step is called curing. Typically ammonia is in excess with the break-down of organic materials resulting 560 immature in an increase in pH. This combination results in a loss of volatile ammonia (it smells). Once this toxic Nitrate N ppm ammonia has been reduced and the pH drops, the microbes convert the ammonia to nitrates. A low 41 immature ammonia + high nitrate score is indicative of a mature compost, however there are many exceptions. pH value For example, a compost with a low pH (<7) will retain ammonia, while a compost with high lime content 8.50 immature can lose ammonia before the organic fraction becomes stable. Composts must first be stable before curing indicators apply. Cucumber Bioassay 100.0 Percent Cucumbers are chosen for this test because they are salt tolerant and very sensitive to ammonia and organic acid toxicity. Therefore, we can germinate seeds in high concentrations of compost to measure phytotoxic effects without soluble salts being the limiting factor. Values above 80% for both percent emergence and vigor are indicative of a well-cured compost. Exceptions include very high salts that affect the cucumbers, excessive concentrations of nitrates and other nutrients that will be in range when formulated to make a growing media. In addition to testing a 1:1 compost: vermiculite blend, we also test a diluted 1:3 blend to indicate a more sensitive toxicity level. Is Your Compost Safe Regarding Health? Fecal Coliform < 1000 / g dry wt. Fecal coliforms can survive in both aerobic and anaerobic conditions and is common in all initial compost piles. Most human pathogens occur from fecal matter and all fecal matter is loaded in fecal coliforms. Therefore fecal coliforms are used as an indicator to determine if the chosen method for pathogen reduction (heat for compost) has met the requirements of sufficient temperature, time and mixing. If the fecal coliforms are reduced to below 1000 per gram dry wt. it is assumed all others pathogens are eliminated. Potential problems are that fecal coliform can regrow during the curing phase or during shipping. This is because the conditions are now more favorable for growth than during the composting process. Salmonella Bacteria Less than 3 3 / 4g dry wt. Salmonella is not only another indicator organism but also a toxic microbe. It has been used in the case of biosolids industry to determine adequate pathogen reduction. Metals Pass The ten heavy metals listed in the EPA 503 regulations are chosen to determine if compost can be applied to ag land and handled without toxic effects. Most high concentrations of heavy metals are derived from woodwaste feedstock such as chrome-arsenic treated or lead painted demolition wood. Biosolids are rarely a problem. Does Your Compost Provide Nutrients or Organic Matter? Nutrients (N+P2O5+K2O) 1.8 low nutrient content This value is the sum of the primary nutrients Nitrogen, Phosphorus and Potassium. Reported units are consistent with those found on fertilizer formulations. A sum greater than 5 is indicative of a compost with high nutrient content, and best used to supply nutrients to a receiving soil. A sum below 2 indicates low nutrient content, and is best-used to improve soil structure via the addition of organic matter. Most compost falls between 2 and 5. Oct16A No. 12 05 Oct. 16 BR-1 Account No.: Date Received 6100124 - 1/2 - 7372 Sample i.d. Group: Sample I.d. No. 1/2 6100124 INTERPRETATION:Page three of three AgIndex (Nutrients/Na+Cl) 11 High nutrient ratio Composts with low AgIndex values have high concentrations of sodium and/or chloride compared to nutrients. Repeated use of a compost with a low AgIndex (< 2) may result in sodium and/or chloride acting as the limiting factor compared to nutrients, governing application rates. These composts may be used on well-draining soils and/or with salt-tolerant plants. Additional nutrients form another source may be needed if the application rate is limited by sodium or chloride. If the AgIndex is above 10, nutrients optimal for plant growth will be available without concern of sodium and/or chloride toxicity. Composts with an AgIndex of above 10 are good for increasing nutrient levels for all soils. Most composts score between 2 and 10. Concentrations of nutrients, sodium, and chloride in the receiving soil should be considered when determining compost application rates. The AgIndex is a product of feedstock quality. Feedstock from dairy manure, marine waste, industrial wastes, and halophytic plants are likely to produce a finished compost with a low AgIndex. Plant Available Nitrogen (lbs/ton) 3 Low N Provider Plant Available Nitrogen (PAN) is calculated by estimating the release rate of Nitrogen from the organic fraction of the compost. This estimate is based on information gathered from the BAC test and measured ammonia and nitrate values. Despite the PAN value of the compost, additional sources of Nitrogen may be needed during he growing season to off- set the Nitrogen demand of the microbes present in the compost. With ample nutrients these microbes can further breakdown organic matter in the compost and release bound Nitrogen. Nitrogen demand based on a high C/N ratio is not considered in the PAN calculation because additional Nitrogen should always be supplemented to the receiving soil when composts with a high C/N ratio are applied. C/N Ratio 15 Indicates immaturity As a guiding principal, a C/N ratio below 14 indicates maturity and above 14 indicates immaturity, however, there are many exceptions. Large woodchips (>6.3mm), bark, and redwood are slow to breakdown and therefore can result in a relatively stable product while the C/N ratio value is high. Additionally, some composts with chicken manure and/or green grass feedstocks can start with a C/N ratio below 15 and are very unstable. A C/N ratio below 10 supplies Nitrogen, while a ratio above 20 can deplete Nitrogen from the soil. The rate at which Nitrogen will be released or used by the microbes is indicated by the respiration rate (BAC). If the respiration rate is too high the transfer of Nitrogen will not be controlable. Soluble Nutrients & Salts (EC5 w/w dw - mmhos/cm) 2.3 Average salts This value refers to all soluble ions including nutrients, sodium, chloride and some soluble organic compounds. The concentration of salts will change due to the release of salts from the organic matter as it degrades, volatilization of ammonia, decomposition of soluble organics, and conversion of molecular structure. High salts + high AgIndex is indicative of a compost high in readily available nutrients. The application rate of these composts should be limited by the optimum nutrient value based on soil analysis of the receiving soil. High Salts + low AgIndex is indicative of a compost low in nutrients with high concentrations of sodium and/or chloride. Limit the application rate according to the toxicity level of thesodium and/or chloride. Low salts indicates that the compost can be applied without risking salt toxicity, is likely a good source of organic matter, and that nutrients will release slowly over time. Lime Content (lbs. per ton) 710 High lime content Compost high in lime or carbonates are often those produced from chicken manure (layers) ash materials, and lime products. These are excellent products to use on a receiving soil where lime has been recommended by soil analysis to raise the pH. Composts with a high lime content should be closely considered for pH requirements when formulating potting mixes. Physical Properties Percent Ash 70.0 High ash content Ash is the non-organic fraction of a compost. Most composts contain approximately 50% ash (dry weight basis). Compost can be high in ash content for many reasons including: excess minerilzation(old compost), contamination with soil base material during turning, poor quality feedstock, and soil or mineral products added. Finding the source and reducing high ash content is often the fastest means to increasing nutrient quality of a compost. Particle Size % > 6.3 MM (0.25") 3.5 May restrict use Large particles may restrict use for potting soils, golf course topdressings, seed-starter mixes, and where a fine size distribution is required. Composts with large particles can still be used as excellent additions to field soils, shrub mixes and mulches. Particle Size Distribution Each size fraction is measured by weight, volume and bulk density. These results are particularly relevent with decisions to screen or not, and if screening, which size screen to use. The bulk density indicates if the fraction screened is made of light weight organic material or heavy mineral material. Removing large mineral material can greatly improve compost quality by increasing nutrient and organic concentrations. Appendix: Estimated available nutrients for use when calculating application rates Plant Available Nitrogen (PAN) calculations: lbs/ton (As Rcvd.) PAN = (X * (organic N)) + ((NH4-N) + (NO3-N)) X value = If BAC < 2 then X = 0.1 Plant Available Nitrogen (PAN) 2.9 If BAC =2.1 to 5 then X = 0.2 Ammonia (NH4-N) 0.66 If BAC =5.1 to 10 then X = 0.3 Nitrate (NO3-N) 0.05 If BAC > 10 then X = 0.4 Available Phosphorus (P2O5*0.64) 4.4 Note: If C/N ratio > 15 additional N should be applied. Available Potassium (K2O) 3.4 05 Oct. 16 BR-1 Oct16A No. 12 TEL: 831-724-5422 FAX: 831-724-3188 www.compostlab.com Account #: 6100124-1/2-7372 Group: Oct16A #12 Reporting Date: Brooks Contractor 1195 Beal Rd. Attn: Amy Brooks Date Received: 05 Oct. 16 Sample Identification: BR-1 Sample ID #: 6100124 - 1/2 Metals Results Units MDL % Recovery Date Tested Arsenic (As): 3.1 mg/kg dw 1.0 92.3 12 Oct. 16 Cadmium (Cd): Less than 1.0 mg/kg dw 1.0 83.1 12 Oct. 16 Chromium (Cr): 8.6 mg/kg dw 1.0 83.4 12 Oct. 16 Copper (Cu): 21 mg/kg dw 1.0 91.6 12 Oct. 16 Lead (Pb): 8.4 mg/kg dw 1.0 81.4 12 Oct. 16 Mercury (Hg): Less than 1.0 mg/kg dw 1.0 86.5 12 Oct. 16 Molybdenum (Mo): Less than 1.0 mg/kg dw 1.0 83.3 12 Oct. 16 Nickel (Ni): 4.6 mg/kg dw 1.0 90.9 12 Oct. 16 Selenium (Se): Less than 1.0 mg/kg dw 1.0 84.7 12 Oct. 16 Zinc (Zn): 73 mg/kg dw 1.0 94.4 12 Oct. 16 Cobalt (Co) 3.2 mg/kg dw 0.50 85.8 12 Oct. 16 Total Solids (TMECC 03.09) 60 % 0.05 NA 07 Oct. 16 Bacteria Results Units MDL Date Tested Fecal Coliform 19 MPN/g dw 05 Oct. 16 Salmonella Less than 3 MPN/4g dw 3 05 Oct. 16 Pollutant Loading Rate: Multiply mg/kg dry weight values times 0.0595 to give you kilograms pollutant per 100 metric ton compost as-received based on a moisture content of 40.5 percent. Method (metals): EPA 3050B / EPA 6010 Method (metals): TMECC 04.12-B / 04.14-A Method (Mercury Hg) TMECC 04.06 / EPA 7471 Method (Fecal Coliform): Standard Methods 9221E Method (Salmonella): TMECC 07.02-A Analyst: Assaf Sadeh Goldston, NC 27252 October 20, 2016 Metals & Bacteria TEL: 831-724-5422 FAX: 831-724-3188 www.compostlab.com Account #: 7010489-2/3-7372 Group: Jan17C #42 Reporting Date: Brooks Contractor 1195 Beal Rd. Goldston, NC 27252 Attn: Amy Brooks Date Received: 19 Jan. 17 Sample Identification: BR-1F Sample ID #: 7010489 - 2/3 Nutrients Dry wt. As Rcvd. units Stability Indicator:Biologically Total Nitrogen:1.2 0.76 %CO2 Evolution Respirometery Available C Ammonia (NH4-N):< 10 < 6.4 mg/kg mg CO2-C/g OM/day 2.3 2.4 Nitrate (NO3-N):280 180 mg/kg mg CO2-C/g TS/day 0.49 0.52 Org. Nitrogen (Org.-N):1.2 0.77 % Stability Rating stable stable Phosphorus (as P2O5):0.36 0.23 % Phosphorus (P):1600 1000 mg/kg Potassium (as K2O):0.12 0.077 %Maturity Indicator: Cucumber Bioassay Potassium (K):990 640 mg/kg Compost:Vermiculite(v:v) 1:2 Calcium (Ca):10 6.7 % Emergence (%) 93 Magnesium (Mg):0.19 0.12 % Seedling Vigor (%) 119 Sulfate (SO4-S):100 67 mg/kg Description of Plants healthy Boron (Total B):3.5 2.2 mg/kg Moisture:0 35.7 % Sodium (Na):0.050 0.032 %Pathogens Results Units Rating Chloride (Cl):0.019 0.012 % Fecal Coliform < 7.5 MPN/g pass pH Value:NA 7.47 unit Salmonella < 3 MPN/4g pass Bulk Density :38 59 lb/cu ft Date Tested: 19 Jan. 17 Carbonates (CaCO3):890 570 lb/ton Conductivity (EC5):0.95 NA mmhos/cm Organic Matter:21.7 13.9 %Inerts % by weight Organic Carbon:12.0 7.6 % Plastic < 0.5 Ash:78.3 50.4 % Glass < 0.5 C/N Ratio 10 10 ratio Metal < 0.5 AgIndex > 10 > 10 ratio Sharps ND Metals Dry wt. EPA Limit units Size Distribution Aluminum (Al): 2900 - mg/kg MM % by weight Arsenic (As): 1.4 41 mg/kg > 50 0.0 Cadmium (Cd): < 1.0 39 mg/kg 25 to 50 0.0 Chromium (Cr): 5.3 1200 mg/kg 16 to 25 0.0 Cobalt (Co) 1.6 - mg/kg 9.5 to 16 0.0 Copper (Cu): 12 1500 mg/kg 6.3 to 9.5 0.4 Iron (Fe): 4900 - mg/kg 4.0 to 6.3 2.5 Lead (Pb): 6.7 300 mg/kg 2.0 to 4.0 9.3 Manganese (Mn): 140 - mg/kg < 2.0 87.8 Mercury (Hg): < 1.0 17 mg/kg Molybdenum (Mo): < 1.0 75 mg/kg Nickel (Ni): 2.7 420 mg/kg Analyst: Assaf Sadeh Selenium (Se): < 1.0 36 mg/kg Zinc (Zn): 58 2800 mg/kg *Sample was received and handled in accordance with TMECC procedures. February 2, 2017 Account No.: Date Received 19 Jan. 17 7010489 - 2/3 - 7372 Sample i.d. Group: Sample I.d. No. 2/3 7010489 INTERPRETATION:Page one of three Is Your Compost Stable? Respiration Rate Biodegradation Rate of Your Pile 2.3 mg CO2-C/ g OM/day Biologically Available Carbon (BAC)Optimum Degradation Rate 2.4 mg CO2-C/ g OM/day Is Your Compost Mature? 0.011 Ratio Ammonia N ppm <10 mg/kg dry wt. Nitrate N ppm 280 mg/kg dry wt. pH value 7.47 units Cucumber Emergence 93.3 percent Is Your Compost Safe Regarding Health? Fecal Coliform < 1000 MPN/g dry wt. Salmonella Less than 3 /4g dry wt. Metals US EPA 503 Pass dry wt. Does Your Compost Provide Nutrients or Organic Matter? Nutrients (N+P2O5+K2O) 1.7 Percent dry wt. AgIndex (Nutrients / Sodium and Chloride Salts)((N+P2O5+K2O) / (Na + Cl)) 15 Ratio Plant Available Nitrogen (PAN)Estimated release for first season 3 lbs/ton wet wt. C/N Ratio 10 Ratio Soluble Available Nutrients & Salts (EC5 w/w dw) 0.95 mmhos/cm dry wt. Lime Content (CaCO3) 890 Lbs/ton dry wt. What are the physical properties of your compost? Percent Ash 78.3 Percent +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ dry wt. Sieve Size % > 6.3 MM (0.25") 0.4 Percent dry wt. < Stable >|<Moderately Unstable>|< Unstable >|< High For Mulch AmmoniaN/NitrateN ratio + BR-1F +++++++++ < Stable >|<Moderately Unstable>|< Unstable >|< High For Mulch +++++++++ VeryMature>|< Mature >|< Immature + VeryMature>|< Mature >|< Immature ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ < Immature >|< Mature +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ < Immature >|< Mature >|< Immature +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ < Immature >|< Mature +++++++ < Safe >|< High Fecal Coliform +++++++ <Safe (none detected) >|< High Salmonella Count(> 3 per 4 grams) +++++++++ <All Metals Pass >|< One or more Metals Fail +++++++++++++++++++ +++++++++++++ <Low >|< Average >|< High Nutrient Content +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Na & Cl >|< Nutrient and Sodium and Chloride Provider >|< Nutrient Provider < Low >|< Average >|< High Lime Content (as CaCO3) < High Organic Matter >|< Average >|< High Ash Content +++ All Uses >|< Size May Restrict Uses for Potting mix and Golf Courses Low Nitrogen Provider>|< Average Nitrogen Provider >|<High Nitrogen Provider Jan17C No. 42 < Nitrogen Release >|< N-Neutral >|< N-Demand>|< High Nitrogen Demand +++++ SloRelease>|< Average Nutrient Release Rate >|<High Available Nutrients ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ +++++++++++++ Account No.: Date Received 7010489 - 2/3 - 7372 Sample i.d. Group: Sample I.d. No. 2/3 7010489 INTERPRETATION: Is Your Compost Stable?Page two of three Respiration Rate 2.3 Low: Good for all uses mg CO2-C/g OM/day The respiration rate is a measurement of the biodegradation rate of the organic matter in the sample (as received). The respiration rate is determined by measuring the rate at which CO2 is released under optimized moisture and temperature conditions. Biologically Available Carbon 2.4 Low: Good for all uses mg CO2-C/g OM/day Biologically Available Carbon (BAC) is a measurement of the rate at which CO2 is released under optimized moisture, temperature, porosity, nutrients, pH and microbial conditions. If both the RR and the BAC test values are close to the same value, the pile is optimized for composting. If both values are high the compost pile just needs more time. If both values are low the compost has stabilized and should be moved to curing. BAC test values that are higher than RR indicate that the compost pile has stalled. This could be due to anaerobic conditions, lack of available nitrogen due to excessive air converting ammonia to the unavailable nitrate form, lack of nitrogen or other nutrients due to poor choice of feedstock, pH value out of range, or microbes rendered non-active. Is Your Compost Mature? AmmoniaN:NitrateN ratio 0.011 very mature Composting to stabilize carbon can occur at such a rapid rate that sometimes phytotoxins remain in the compost and must be neutralized before using in high concentrations or in high-end uses. This Ammonia N ppm step is called curing. Typically ammonia is in excess with the break-down of organic materials resulting <10 NA in an increase in pH. This combination results in a loss of volatile ammonia (it smells). Once this toxic Nitrate N ppm ammonia has been reduced and the pH drops, the microbes convert the ammonia to nitrates. A low 280 mature ammonia + high nitrate score is indicative of a mature compost, however there are many exceptions. pH value For example, a compost with a low pH (<7) will retain ammonia, while a compost with high lime content 7.47 mature can lose ammonia before the organic fraction becomes stable. Composts must first be stable before curing indicators apply. Cucumber Bioassay 93.3 Percent Cucumbers are chosen for this test because they are salt tolerant and very sensitive to ammonia and organic acid toxicity. Therefore, we can germinate seeds in high concentrations of compost to measure phytotoxic effects without soluble salts being the limiting factor. Values above 80% for both percent emergence and vigor are indicative of a well-cured compost. Exceptions include very high salts that affect the cucumbers, excessive concentrations of nitrates and other nutrients that will be in range when formulated to make a growing media. In addition to testing a 1:1 compost: vermiculite blend, we also test a diluted 1:3 blend to indicate a more sensitive toxicity level. Is Your Compost Safe Regarding Health? Fecal Coliform < 1000 / g dry wt. Fecal coliforms can survive in both aerobic and anaerobic conditions and is common in all initial compost piles. Most human pathogens occur from fecal matter and all fecal matter is loaded in fecal coliforms. Therefore fecal coliforms are used as an indicator to determine if the chosen method for pathogen reduction (heat for compost) has met the requirements of sufficient temperature, time and mixing. If the fecal coliforms are reduced to below 1000 per gram dry wt. it is assumed all others pathogens are eliminated. Potential problems are that fecal coliform can regrow during the curing phase or during shipping. This is because the conditions are now more favorable for growth than during the composting process. Salmonella Bacteria Less than 3 3 / 4g dry wt. Salmonella is not only another indicator organism but also a toxic microbe. It has been used in the case of biosolids industry to determine adequate pathogen reduction. Metals Pass The ten heavy metals listed in the EPA 503 regulations are chosen to determine if compost can be applied to ag land and handled without toxic effects. Most high concentrations of heavy metals are derived from woodwaste feedstock such as chrome-arsenic treated or lead painted demolition wood. Biosolids are rarely a problem. Does Your Compost Provide Nutrients or Organic Matter? Nutrients (N+P2O5+K2O) 1.7 low nutrient content This value is the sum of the primary nutrients Nitrogen, Phosphorus and Potassium. Reported units are consistent with those found on fertilizer formulations. A sum greater than 5 is indicative of a compost with high nutrient content, and best used to supply nutrients to a receiving soil. A sum below 2 indicates low nutrient content, and is best-used to improve soil structure via the addition of organic matter. Most compost falls between 2 and 5. BR-1F 19 Jan. 17 Jan17C No. 42 Account No.: Date Received 7010489 - 2/3 - 7372 Sample i.d. Group: Sample I.d. No. 2/3 7010489 INTERPRETATION:Page three of three AgIndex (Nutrients/Na+Cl) 15 High nutrient ratio Composts with low AgIndex values have high concentrations of sodium and/or chloride compared to nutrients. Repeated use of a compost with a low AgIndex (< 2) may result in sodium and/or chloride acting as the limiting factor compared to nutrients, governing application rates. These composts may be used on well-draining soils and/or with salt-tolerant plants. Additional nutrients form another source may be needed if the application rate is limited by sodium or chloride. If the AgIndex is above 10, nutrients optimal for plant growth will be available without concern of sodium and/or chloride toxicity. Composts with an AgIndex of above 10 are good for increasing nutrient levels for all soils. Most composts score between 2 and 10. Concentrations of nutrients, sodium, and chloride in the receiving soil should be considered when determining compost application rates. The AgIndex is a product of feedstock quality. Feedstock from dairy manure, marine waste, industrial wastes, and halophytic plants are likely to produce a finished compost with a low AgIndex. Plant Available Nitrogen (lbs/ton) 3 Low N Provider Plant Available Nitrogen (PAN) is calculated by estimating the release rate of Nitrogen from the organic fraction of the compost. This estimate is based on information gathered from the BAC test and measured ammonia and nitrate values. Despite the PAN value of the compost, additional sources of Nitrogen may be needed during he growing season to off- set the Nitrogen demand of the microbes present in the compost. With ample nutrients these microbes can further breakdown organic matter in the compost and release bound Nitrogen. Nitrogen demand based on a high C/N ratio is not considered in the PAN calculation because additional Nitrogen should always be supplemented to the receiving soil when composts with a high C/N ratio are applied. C/N Ratio 10 Indicates maturity As a guiding principal, a C/N ratio below 14 indicates maturity and above 14 indicates immaturity, however, there are many exceptions. Large woodchips (>6.3mm), bark, and redwood are slow to breakdown and therefore can result in a relatively stable product while the C/N ratio value is high. Additionally, some composts with chicken manure and/or green grass feedstocks can start with a C/N ratio below 15 and are very unstable. A C/N ratio below 10 supplies Nitrogen, while a ratio above 20 can deplete Nitrogen from the soil. The rate at which Nitrogen will be released or used by the microbes is indicated by the respiration rate (BAC). If the respiration rate is too high the transfer of Nitrogen will not be controlable. Soluble Nutrients & Salts (EC5 w/w dw - mmhos/cm) 0.95 Low salts This value refers to all soluble ions including nutrients, sodium, chloride and some soluble organic compounds. The concentration of salts will change due to the release of salts from the organic matter as it degrades, volatilization of ammonia, decomposition of soluble organics, and conversion of molecular structure. High salts + high AgIndex is indicative of a compost high in readily available nutrients. The application rate of these composts should be limited by the optimum nutrient value based on soil analysis of the receiving soil. High Salts + low AgIndex is indicative of a compost low in nutrients with high concentrations of sodium and/or chloride. Limit the application rate according to the toxicity level of thesodium and/or chloride. Low salts indicates that the compost can be applied without risking salt toxicity, is likely a good source of organic matter, and that nutrients will release slowly over time. Lime Content (lbs. per ton) 890 High lime content Compost high in lime or carbonates are often those produced from chicken manure (layers) ash materials, and lime products. These are excellent products to use on a receiving soil where lime has been recommended by soil analysis to raise the pH. Composts with a high lime content should be closely considered for pH requirements when formulating potting mixes. Physical Properties Percent Ash 78.3 High ash content Ash is the non-organic fraction of a compost. Most composts contain approximately 50% ash (dry weight basis). Compost can be high in ash content for many reasons including: excess minerilzation(old compost), contamination with soil base material during turning, poor quality feedstock, and soil or mineral products added. Finding the source and reducing high ash content is often the fastest means to increasing nutrient quality of a compost. Particle Size % > 6.3 MM (0.25") 0.4 Suitable for all uses Large particles may restrict use for potting soils, golf course topdressings, seed-starter mixes, and where a fine size distribution is required. Composts with large particles can still be used as excellent additions to field soils, shrub mixes and mulches. Particle Size Distribution Each size fraction is measured by weight, volume and bulk density. These results are particularly relevent with decisions to screen or not, and if screening, which size screen to use. The bulk density indicates if the fraction screened is made of light weight organic material or heavy mineral material. Removing large mineral material can greatly improve compost quality by increasing nutrient and organic concentrations. Appendix: Estimated available nutrients for use when calculating application rates Plant Available Nitrogen (PAN) calculations: lbs/ton (As Rcvd.) PAN = (X * (organic N)) + ((NH4-N) + (NO3-N)) X value = If BAC < 2 then X = 0.1 Plant Available Nitrogen (PAN) 3.3 If BAC =2.1 to 5 then X = 0.2 Ammonia (NH4-N) 0.00 If BAC =5.1 to 10 then X = 0.3 Nitrate (NO3-N) 0.36 If BAC > 10 then X = 0.4 Available Phosphorus (P2O5*0.64) 2.9 Note: If C/N ratio > 15 additional N should be applied. Available Potassium (K2O) 1.5 19 Jan. 17 BR-1F Jan17C No. 42 TEL: 831-724-5422 FAX: 831-724-3188 www.compostlab.com Account #: 7010489-2/3-7372 Group: Jan17C #42 Reporting Date: Brooks Contractor 1195 Beal Rd. Attn: Amy Brooks Date Received: 19 Jan. 17 Sample Identification: BR-1F Sample ID #: 7010489 - 2/3 Metals Results Units MDL % Recovery Date Tested Arsenic (As): 1.4 mg/kg dw 1.0 92.8 25 Jan. 17 Cadmium (Cd): Less than 1.0 mg/kg dw 1.0 83.4 25 Jan. 17 Chromium (Cr): 5.3 mg/kg dw 1.0 85.8 25 Jan. 17 Copper (Cu): 12 mg/kg dw 1.0 96.5 25 Jan. 17 Lead (Pb): 6.7 mg/kg dw 1.0 83.7 25 Jan. 17 Mercury (Hg): Less than 1.0 mg/kg dw 1.0 92.4 25 Jan. 17 Molybdenum (Mo): Less than 1.0 mg/kg dw 1.0 82.1 25 Jan. 17 Nickel (Ni): 2.7 mg/kg dw 1.0 98.3 25 Jan. 17 Selenium (Se): Less than 1.0 mg/kg dw 1.0 81.3 25 Jan. 17 Zinc (Zn): 58 mg/kg dw 1.0 94.9 25 Jan. 17 Cobalt (Co) 1.6 mg/kg dw 0.50 92.2 25 Jan. 17 Total Solids (TMECC 03.09) 64 % 0.05 NA 20 Jan. 17 Bacteria Results Units MDL Date Tested Fecal Coliform Less than 7.5 MPN/g dw 7.5 19 Jan. 17 Salmonella Less than 3 MPN/4g dw 3 19 Jan. 17 Pollutant Loading Rate: Multiply mg/kg dry weight values times 0.0643 to give you kilograms pollutant per 100 metric ton compost as-received based on a moisture content of 35.7 percent. Method (metals): EPA 3050B / EPA 6010 Method (metals): TMECC 04.12-B / 04.14-A Method (Mercury Hg) TMECC 04.06 / EPA 7471 Method (Fecal Coliform): Standard Methods 9221E Method (Salmonella): TMECC 07.02-A Analyst: Assaf Sadeh Goldston, NC 27252 December 8, 2016 Metals & Bacteria TEL: 831-724-5422 FAX: 831-724-3188 www.compostlab.com Account #: 7060976-3/3-7372 Group: Jun17E #8 Reporting Date: Brooks Contractor 1195 Beal Rd. Goldston, NC 27252 Attn: Amy Brooks Date Received: 27 Jun. 17 Sample Identification: BR-1F Sample ID #: 7060976 - 3/3 Nutrients Dry wt. As Rcvd. units Stability Indicator:Biologically Total Nitrogen:0.96 0.61 %CO2 Evolution Respirometery Available C Ammonia (NH4-N):< 10 < 6.4 mg/kg mg CO2-C/g OM/day 1.1 1.1 Nitrate (NO3-N):860 550 mg/kg mg CO2-C/g TS/day 0.32 0.33 Org. Nitrogen (Org.-N):0.87 0.56 % Stability Rating very stable very stable Phosphorus (as P2O5):0.45 0.29 % Phosphorus (P):2000 1300 mg/kg Potassium (as K2O):0.24 0.15 %Maturity Indicator: Cucumber Bioassay Potassium (K):2000 1300 mg/kg Compost:Vermiculite(v:v) 1:2 Calcium (Ca):14 8.7 % Emergence (%) 100 Magnesium (Mg):0.28 0.18 % Seedling Vigor (%) 117 Sulfate (SO4-S):230 150 mg/kg Description of Plants Boron (Total B):5.9 3.8 mg/kg Moisture:0 36.2 % Sodium (Na):0.097 0.062 %Pathogens Results Units Rating Chloride (Cl):0.094 0.060 % Fecal Coliform < 7.5 MPN/g pass pH Value:NA 7.02 unit Salmonella < 3 MPN/4g pass Bulk Density :33 51 lb/cu ft Date Tested: 27 Jun. 17 Carbonates (CaCO3):690 440 lb/ton Conductivity (EC5):2.8 NA mmhos/cm Organic Matter:30.2 19.2 %Inerts % by weight Organic Carbon:13.0 8.4 % Plastic < 0.5 Ash:69.8 44.5 % Glass < 0.5 C/N Ratio 14 14 ratio Metal < 0.5 AgIndex 9 9 ratio Sharps ND Metals Dry wt. EPA Limit units Size Distribution Aluminum (Al): 4900 - mg/kg MM % by weight Arsenic (As): 2.3 41 mg/kg > 50 0.0 Cadmium (Cd): < 1.0 39 mg/kg 25 to 50 0.0 Chromium (Cr): 9.9 1200 mg/kg 16 to 25 0.0 Cobalt (Co) 2.7 - mg/kg 9.5 to 16 0.6 Copper (Cu): 14 1500 mg/kg 6.3 to 9.5 0.6 Iron (Fe): 6900 - mg/kg 4.0 to 6.3 3.7 Lead (Pb): 6.6 300 mg/kg 2.0 to 4.0 10.4 Manganese (Mn): 210 - mg/kg < 2.0 84.6 Mercury (Hg): < 1.0 17 mg/kg Molybdenum (Mo): < 1.0 75 mg/kg Nickel (Ni): 4.5 420 mg/kg Analyst: Assaf Sadeh Selenium (Se): < 1.0 36 mg/kg Zinc (Zn): 64 2800 mg/kg *Sample was received and handled in accordance with TMECC procedures. July 26, 2017 Account No.: Date Received 27 Jun. 17 7060976 - 3/3 - 7372 Sample i.d. Group: Sample I.d. No. 3/3 7060976 INTERPRETATION:Page one of three Is Your Compost Stable? Respiration Rate Biodegradation Rate of Your Pile 1.1 mg CO2-C/ g OM/day Biologically Available Carbon (BAC)Optimum Degradation Rate 1.1 mg CO2-C/ g OM/day Is Your Compost Mature? 0.0063 Ratio Ammonia N ppm <10 mg/kg dry wt. Nitrate N ppm 860 mg/kg dry wt. pH value 7.02 units Cucumber Emergence 100.0 percent Is Your Compost Safe Regarding Health? Fecal Coliform < 1000 MPN/g dry wt. Salmonella Less than 3 /4g dry wt. Metals US EPA 503 Pass dry wt. Does Your Compost Provide Nutrients or Organic Matter? Nutrients (N+P2O5+K2O) 1.7 Percent dry wt. AgIndex (Nutrients / Sodium and Chloride Salts)((N+P2O5+K2O) / (Na + Cl)) 9 Ratio Plant Available Nitrogen (PAN)Estimated release for first season 2 lbs/ton wet wt. C/N Ratio 14 Ratio Soluble Available Nutrients & Salts (EC5 w/w dw) 2.8 mmhos/cm dry wt. Lime Content (CaCO3) 690 Lbs/ton dry wt. What are the physical properties of your compost? Percent Ash 69.8 Percent +++++++++++++++++++++++++++++++++++++++++++++++++++++++ dry wt. Sieve Size % > 6.3 MM (0.25") 1.2 Percent dry wt. < Stable >|<Moderately Unstable>|< Unstable >|< High For Mulch AmmoniaN/NitrateN ratio + BR-1F ++++ < Stable >|<Moderately Unstable>|< Unstable >|< High For Mulch ++++ VeryMature>|< Mature >|< Immature + VeryMature>|< Mature >|< Immature ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ < Immature >|< Mature +++++++++++++++++++++++++++++++++++++++++++++++++++++++ < Immature >|< Mature >|< Immature +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ < Immature >|< Mature +++++++ < Safe >|< High Fecal Coliform +++++++ <Safe (none detected) >|< High Salmonella Count(> 3 per 4 grams) +++++++++ <All Metals Pass >|< One or more Metals Fail +++++++++++++++++++++++++++ +++++++++++++ <Low >|< Average >|< High Nutrient Content +++++++++++++++++++++++++++++++++++++++++++++ Na & Cl >|< Nutrient and Sodium and Chloride Provider >|< Nutrient Provider < Low >|< Average >|< High Lime Content (as CaCO3) < High Organic Matter >|< Average >|< High Ash Content +++++++++ All Uses >|< Size May Restrict Uses for Potting mix and Golf Courses Low Nitrogen Provider>|< Average Nitrogen Provider >|<High Nitrogen Provider Jun17E No. 8 < Nitrogen Release >|< N-Neutral >|< N-Demand>|< High Nitrogen Demand ++++++++++++++ SloRelease>|< Average Nutrient Release Rate >|<High Available Nutrients ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ ++++++++ Account No.: Date Received 7060976 - 3/3 - 7372 Sample i.d. Group: Sample I.d. No. 3/3 7060976 INTERPRETATION: Is Your Compost Stable?Page two of three Respiration Rate 1.1 Low: Good for all uses mg CO2-C/g OM/day The respiration rate is a measurement of the biodegradation rate of the organic matter in the sample (as received). The respiration rate is determined by measuring the rate at which CO2 is released under optimized moisture and temperature conditions. Biologically Available Carbon 1.1 Low: Good for all uses mg CO2-C/g OM/day Biologically Available Carbon (BAC) is a measurement of the rate at which CO2 is released under optimized moisture, temperature, porosity, nutrients, pH and microbial conditions. If both the RR and the BAC test values are close to the same value, the pile is optimized for composting. If both values are high the compost pile just needs more time. If both values are low the compost has stabilized and should be moved to curing. BAC test values that are higher than RR indicate that the compost pile has stalled. This could be due to anaerobic conditions, lack of available nitrogen due to excessive air converting ammonia to the unavailable nitrate form, lack of nitrogen or other nutrients due to poor choice of feedstock, pH value out of range, or microbes rendered non-active. Is Your Compost Mature? AmmoniaN:NitrateN ratio 0.0063 very mature Composting to stabilize carbon can occur at such a rapid rate that sometimes phytotoxins remain in the compost and must be neutralized before using in high concentrations or in high-end uses. This Ammonia N ppm step is called curing. Typically ammonia is in excess with the break-down of organic materials resulting <10 NA in an increase in pH. This combination results in a loss of volatile ammonia (it smells). Once this toxic Nitrate N ppm ammonia has been reduced and the pH drops, the microbes convert the ammonia to nitrates. A low 860 mature ammonia + high nitrate score is indicative of a mature compost, however there are many exceptions. pH value For example, a compost with a low pH (<7) will retain ammonia, while a compost with high lime content 7.02 mature can lose ammonia before the organic fraction becomes stable. Composts must first be stable before curing indicators apply. Cucumber Bioassay 100.0 Percent Cucumbers are chosen for this test because they are salt tolerant and very sensitive to ammonia and organic acid toxicity. Therefore, we can germinate seeds in high concentrations of compost to measure phytotoxic effects without soluble salts being the limiting factor. Values above 80% for both percent emergence and vigor are indicative of a well-cured compost. Exceptions include very high salts that affect the cucumbers, excessive concentrations of nitrates and other nutrients that will be in range when formulated to make a growing media. Is Your Compost Safe Regarding Health? Fecal Coliform < 1000 / g dry wt. Fecal coliforms can survive in both aerobic and anaerobic conditions and is common in all initial compost piles. Most human pathogens occur from fecal matter and all fecal matter is loaded in fecal coliforms. Therefore fecal coliforms are used as an indicator to determine if the chosen method for pathogen reduction (heat for compost) has met the requirements of sufficient temperature, time and mixing. If the fecal coliforms are reduced to below 1000 per gram dry wt. it is assumed all others pathogens are eliminated. Potential problems are that fecal coliform can regrow during the curing phase or during shipping. This is because the conditions are now more favorable for growth than during the composting process. Salmonella Bacteria Less than 3 3 / 4g dry wt. Salmonella is not only another indicator organism but also a toxic microbe. It has been used in the case of biosolids industry to determine adequate pathogen reduction. Metals Pass The ten heavy metals listed in the EPA 503 regulations are chosen to determine if compost can be applied to ag land and handled without toxic effects. Most high concentrations of heavy metals are derived from woodwaste feedstock such as chrome-arsenic treated or lead painted demolition wood. Biosolids are rarely a problem. Does Your Compost Provide Nutrients or Organic Matter? Nutrients (N+P2O5+K2O) 1.7 low nutrient content This value is the sum of the primary nutrients Nitrogen, Phosphorus and Potassium. Reported units are consistent with those found on fertilizer formulations. A sum greater than 5 is indicative of a compost with high nutrient content, and best used to supply nutrients to a receiving soil. A sum below 2 indicates low nutrient content, and is best-used to improve soil structure via the addition of organic matter. Most compost falls between 2 and 5. BR-1F 27 Jun. 17 Jun17E No. 8 Account No.: Date Received 7060976 - 3/3 - 7372 Sample i.d. Group: Sample I.d. No. 3/3 7060976 INTERPRETATION:Page three of three AgIndex (Nutrients/Na+Cl) 9 Average nutrient ratio Composts with low AgIndex values have high concentrations of sodium and/or chloride compared to nutrients. Repeated use of a compost with a low AgIndex (< 2) may result in sodium and/or chloride acting as the limiting factor compared to nutrients, governing application rates. These composts may be used on well-draining soils and/or with salt-tolerant plants. Additional nutrients form another source may be needed if the application rate is limited by sodium or chloride. If the AgIndex is above 10, nutrients optimal for plant growth will be available without concern of sodium and/or chloride toxicity. Composts with an AgIndex of above 10 are good for increasing nutrient levels for all soils. Most composts score between 2 and 10. Concentrations of nutrients, sodium, and chloride in the receiving soil should be considered when determining compost application rates. The AgIndex is a product of feedstock quality. Feedstock from dairy manure, marine waste, industrial wastes, and halophytic plants are likely to produce a finished compost with a low AgIndex. Plant Available Nitrogen (lbs/ton) 2 Low N Provider Plant Available Nitrogen (PAN) is calculated by estimating the release rate of Nitrogen from the organic fraction of the compost. This estimate is based on information gathered from the BAC test and measured ammonia and nitrate values. Despite the PAN value of the compost, additional sources of Nitrogen may be needed during he growing season to off- set the Nitrogen demand of the microbes present in the compost. With ample nutrients these microbes can further breakdown organic matter in the compost and release bound Nitrogen. Nitrogen demand based on a high C/N ratio is not considered in the PAN calculation because additional Nitrogen should always be supplemented to the receiving soil when composts with a high C/N ratio are applied. C/N Ratio 14 Indicates maturity As a guiding principal, a C/N ratio below 14 indicates maturity and above 14 indicates immaturity, however, there are many exceptions. Large woodchips (>6.3mm), bark, and redwood are slow to breakdown and therefore can result in a relatively stable product while the C/N ratio value is high. Additionally, some composts with chicken manure and/or green grass feedstocks can start with a C/N ratio below 15 and are very unstable. A C/N ratio below 10 supplies Nitrogen, while a ratio above 20 can deplete Nitrogen from the soil. The rate at which Nitrogen will be released or used by the microbes is indicated by the respiration rate (BAC). If the respiration rate is too high the transfer of Nitrogen will not be controlable. Soluble Nutrients & Salts (EC5 w/w dw - mmhos/cm) 2.8 Average salts This value refers to all soluble ions including nutrients, sodium, chloride and some soluble organic compounds. The concentration of salts will change due to the release of salts from the organic matter as it degrades, volatilization of ammonia, decomposition of soluble organics, and conversion of molecular structure. High salts + high AgIndex is indicative of a compost high in readily available nutrients. The application rate of these composts should be limited by the optimum nutrient value based on soil analysis of the receiving soil. High Salts + low AgIndex is indicative of a compost low in nutrients with high concentrations of sodium and/or chloride. Limit the application rate according to the toxicity level of thesodium and/or chloride. Low salts indicates that the compost can be applied without risking salt toxicity, is likely a good source of organic matter, and that nutrients will release slowly over time. Lime Content (lbs. per ton) 690 High lime content Compost high in lime or carbonates are often those produced from chicken manure (layers) ash materials, and lime products. These are excellent products to use on a receiving soil where lime has been recommended by soil analysis to raise the pH. Composts with a high lime content should be closely considered for pH requirements when formulating potting mixes. Physical Properties Percent Ash 69.8 High ash content Ash is the non-organic fraction of a compost. Most composts contain approximately 50% ash (dry weight basis). Compost can be high in ash content for many reasons including: excess minerilzation(old compost), contamination with soil base material during turning, poor quality feedstock, and soil or mineral products added. Finding the source and reducing high ash content is often the fastest means to increasing nutrient quality of a compost. Particle Size % > 6.3 MM (0.25") 1.2 May restrict use Large particles may restrict use for potting soils, golf course topdressings, seed-starter mixes, and where a fine size distribution is required. Composts with large particles can still be used as excellent additions to field soils, shrub mixes and mulches. Particle Size Distribution Each size fraction is measured by weight, volume and bulk density. These results are particularly relevent with decisions to screen or not, and if screening, which size screen to use. The bulk density indicates if the fraction screened is made of light weight organic material or heavy mineral material. Removing large mineral material can greatly improve compost quality by increasing nutrient and organic concentrations. Appendix: Estimated available nutrients for use when calculating application rates Plant Available Nitrogen (PAN) calculations: lbs/ton (As Rcvd.) PAN = (X * (organic N)) + ((NH4-N) + (NO3-N)) X value = If BAC < 2 then X = 0.1 Plant Available Nitrogen (PAN) 2.2 If BAC =2.1 to 5 then X = 0.2 Ammonia (NH4-N) 0.01 If BAC =5.1 to 10 then X = 0.3 Nitrate (NO3-N) 1.10 If BAC > 10 then X = 0.4 Available Phosphorus (P2O5*0.64) 3.8 Note: If C/N ratio > 15 additional N should be applied. Available Potassium (K2O) 3.1 27 Jun. 17 BR-1F Jun17E No. 8 TEL: 831-724-5422 FAX: 831-724-3188 www.compostlab.com Account #: 7060976-3/3-7372 Group: Jun17E #8 Reporting Date: Brooks Contractor 1195 Beal Rd. Attn: Amy Brooks Date Received: 27 Jun. 17 Sample Identification: BR-1F Sample ID #: 7060976 - 3/3 Metals Results Units MDL % Recovery Date Tested Arsenic (As): 2.3 mg/kg dw 1.0 95.9 05 Jul. 17 Cadmium (Cd): Less than 1.0 mg/kg dw 1.0 94.0 05 Jul. 17 Chromium (Cr): 9.9 mg/kg dw 1.0 95.6 05 Jul. 17 Copper (Cu): 14 mg/kg dw 1.0 89.9 05 Jul. 17 Lead (Pb): 6.6 mg/kg dw 1.0 91.9 05 Jul. 17 Mercury (Hg): Less than 1.0 mg/kg dw 1.0 100.8 05 Jul. 17 Molybdenum (Mo): Less than 1.0 mg/kg dw 1.0 86.2 05 Jul. 17 Nickel (Ni): 4.5 mg/kg dw 1.0 97.2 05 Jul. 17 Selenium (Se): Less than 1.0 mg/kg dw 1.0 88.5 05 Jul. 17 Zinc (Zn): 64 mg/kg dw 1.0 99.5 05 Jul. 17 Cobalt (Co) 2.7 mg/kg dw 0.50 98.0 05 Jul. 17 Total Solids (TMECC 03.09) 64 % 0.05 NA 30 Jun. 17 Bacteria Results Units MDL Date Tested Fecal Coliform Less than 7.5 MPN/g dw 7.5 27 Jun. 17 Salmonella Less than 3 MPN/4g dw 3 27 Jun. 17 Pollutant Loading Rate: Multiply mg/kg dry weight values times 0.0638 to give you kilograms pollutant per 100 metric ton compost as-received based on a moisture content of 36.2 percent. Method (metals): EPA 3050B / EPA 6010 Method (metals): TMECC 04.12-B / 04.14-A Method (Mercury Hg) TMECC 04.06 / EPA 7471 Method (Fecal Coliform): Standard Methods 9221E Method (Salmonella): TMECC 07.02-A Analyst: Assaf Sadeh Goldston, NC 27252 July 26, 2017 Metals & Bacteria TEL: 831-724-5422 FAX: 831-724-3188 www.compostlab.com Account #: 6100124-2/2-7372 Group: Oct16A #13 Reporting Date: Brooks Contractor 1195 Beal Rd. Goldston, NC 27252 Attn: Amy Brooks Date Received: 05 Oct. 16 Sample Identification: BR-1F Sample ID #: 6100124 - 2/2 Nutrients Dry wt. As Rcvd. units Stability Indicator:Biologically Total Nitrogen:1.2 0.77 %CO2 Evolution Respirometery Available C Ammonia (NH4-N):< 10 < 6.4 mg/kg mg CO2-C/g OM/day 1.3 2.4 Nitrate (NO3-N):820 530 mg/kg mg CO2-C/g TS/day 0.26 0.49 Org. Nitrogen (Org.-N):1.1 0.71 % Stability Rating very stable stable Phosphorus (as P2O5):0.74 0.48 % Phosphorus (P):3300 2100 mg/kg Potassium (as K2O):0.27 0.17 %Maturity Indicator: Cucumber Bioassay Potassium (K):2200 1400 mg/kg Compost:Vermiculite(v:v) 1:2 Calcium (Ca):16 10 % Emergence (%) 100 Magnesium (Mg):0.32 0.20 % Seedling Vigor (%) 129 Sulfate (SO4-S):220 140 mg/kg Description of Plants healthy Boron (Total B):7.4 4.8 mg/kg Moisture:0 35.5 % Sodium (Na):0.096 0.062 %Pathogens Results Units Rating Chloride (Cl):0.036 0.023 % Fecal Coliform < 7.5 MPN/g pass pH Value:NA 7.23 unit Salmonella < 3 MPN/4g pass Bulk Density :33 50 lb/cu ft Date Tested: 05 Oct. 16 Carbonates (CaCO3):690 440 lb/ton Conductivity (EC5):2.4 NA mmhos/cm Organic Matter:20.4 13.1 %Inerts % by weight Organic Carbon:13.0 8.1 % Plastic < 0.5 Ash:79.6 51.4 % Glass < 0.5 C/N Ratio 11 11 ratio Metal < 0.5 AgIndex > 10 > 10 ratio Sharps ND Metals Dry wt. EPA Limit units Size Distribution Aluminum (Al): 4400 - mg/kg MM % by weight Arsenic (As): 3.4 41 mg/kg > 50 0.0 Cadmium (Cd): < 1.0 39 mg/kg 25 to 50 0.0 Chromium (Cr): 11 1200 mg/kg 16 to 25 0.0 Cobalt (Co) 3.4 - mg/kg 9.5 to 16 0.0 Copper (Cu): 23 1500 mg/kg 6.3 to 9.5 0.3 Iron (Fe): 10000 - mg/kg 4.0 to 6.3 2.6 Lead (Pb): 13 300 mg/kg 2.0 to 4.0 9.4 Manganese (Mn): 310 - mg/kg < 2.0 87.7 Mercury (Hg): < 1.0 17 mg/kg Molybdenum (Mo): < 1.0 75 mg/kg Nickel (Ni): 5.2 420 mg/kg Analyst: Assaf Sadeh Selenium (Se): < 1.0 36 mg/kg Zinc (Zn): 110 2800 mg/kg *Sample was received and handled in accordance with TMECC procedures. October 20, 2016 Account No.: Date Received 05 Oct. 16 6100124 - 2/2 - 7372 Sample i.d. Group: Sample I.d. No. 2/2 6100124 INTERPRETATION:Page one of three Is Your Compost Stable? Respiration Rate Biodegradation Rate of Your Pile 1.3 mg CO2-C/ g OM/day Biologically Available Carbon (BAC)Optimum Degradation Rate 2.4 mg CO2-C/ g OM/day Is Your Compost Mature? 0.0062 Ratio Ammonia N ppm <10 mg/kg dry wt. Nitrate N ppm 820 mg/kg dry wt. pH value 7.23 units Cucumber Emergence 100.0 percent Is Your Compost Safe Regarding Health? Fecal Coliform < 1000 MPN/g dry wt. Salmonella Less than 3 /4g dry wt. Metals US EPA 503 Pass dry wt. Does Your Compost Provide Nutrients or Organic Matter? Nutrients (N+P2O5+K2O) 2.2 Percent dry wt. AgIndex (Nutrients / Sodium and Chloride Salts)((N+P2O5+K2O) / (Na + Cl)) 15 Ratio Plant Available Nitrogen (PAN)Estimated release for first season 4 lbs/ton wet wt. C/N Ratio 11 Ratio Soluble Available Nutrients & Salts (EC5 w/w dw) 2.4 mmhos/cm dry wt. Lime Content (CaCO3) 690 Lbs/ton dry wt. What are the physical properties of your compost? Percent Ash 79.6 Percent ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ dry wt. Sieve Size % > 6.3 MM (0.25") 0.3 Percent dry wt. Oct16A No. 13 < Nitrogen Release >|< N-Neutral >|< N-Demand>|< High Nitrogen Demand ++++++++++++ SloRelease>|< Average Nutrient Release Rate >|<High Available Nutrients ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ +++++++++++++++ < Low >|< Average >|< High Lime Content (as CaCO3) < High Organic Matter >|< Average >|< High Ash Content ++ All Uses >|< Size May Restrict Uses for Potting mix and Golf Courses Low Nitrogen Provider>|< Average Nitrogen Provider >|<High Nitrogen Provider +++++++ <Safe (none detected) >|< High Salmonella Count(> 3 per 4 grams) +++++++++ <All Metals Pass >|< One or more Metals Fail +++++++++++++++++++++ +++++++++++++++++ <Low >|< Average >|< High Nutrient Content +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Na & Cl >|< Nutrient and Sodium and Chloride Provider >|< Nutrient Provider < Immature >|< Mature >|< Immature +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ < Immature >|< Mature +++++++ < Safe >|< High Fecal Coliform VeryMature>|< Mature >|< Immature + VeryMature>|< Mature >|< Immature ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ < Immature >|< Mature +++++++++++++++++++++++++++++++++++++++++++++++++++++++++ < Stable >|<Moderately Unstable>|< Unstable >|< High For Mulch AmmoniaN/NitrateN ratio + BR-1F +++++ < Stable >|<Moderately Unstable>|< Unstable >|< High For Mulch +++++++++ Account No.: Date Received 6100124 - 2/2 - 7372 Sample i.d. Group: Sample I.d. No. 2/2 6100124 INTERPRETATION: Is Your Compost Stable?Page two of three Respiration Rate 1.3 Low: Good for all uses mg CO2-C/g OM/day The respiration rate is a measurement of the biodegradation rate of the organic matter in the sample (as received). The respiration rate is determined by measuring the rate at which CO2 is released under optimized moisture and temperature conditions. Biologically Available Carbon 2.4 Low: Good for all uses mg CO2-C/g OM/day Biologically Available Carbon (BAC) is a measurement of the rate at which CO2 is released under optimized moisture, temperature, porosity, nutrients, pH and microbial conditions. If both the RR and the BAC test values are close to the same value, the pile is optimized for composting. If both values are high the compost pile just needs more time. If both values are low the compost has stabilized and should be moved to curing. BAC test values that are higher than RR indicate that the compost pile has stalled. This could be due to anaerobic conditions, lack of available nitrogen due to excessive air converting ammonia to the unavailable nitrate form, lack of nitrogen or other nutrients due to poor choice of feedstock, pH value out of range, or microbes rendered non-active. Is Your Compost Mature? AmmoniaN:NitrateN ratio 0.0062 very mature Composting to stabilize carbon can occur at such a rapid rate that sometimes phytotoxins remain in the compost and must be neutralized before using in high concentrations or in high-end uses. This Ammonia N ppm step is called curing. Typically ammonia is in excess with the break-down of organic materials resulting <10 NA in an increase in pH. This combination results in a loss of volatile ammonia (it smells). Once this toxic Nitrate N ppm ammonia has been reduced and the pH drops, the microbes convert the ammonia to nitrates. A low 820 mature ammonia + high nitrate score is indicative of a mature compost, however there are many exceptions. pH value For example, a compost with a low pH (<7) will retain ammonia, while a compost with high lime content 7.23 mature can lose ammonia before the organic fraction becomes stable. Composts must first be stable before curing indicators apply. Cucumber Bioassay 100.0 Percent Cucumbers are chosen for this test because they are salt tolerant and very sensitive to ammonia and organic acid toxicity. Therefore, we can germinate seeds in high concentrations of compost to measure phytotoxic effects without soluble salts being the limiting factor. Values above 80% for both percent emergence and vigor are indicative of a well-cured compost. Exceptions include very high salts that affect the cucumbers, excessive concentrations of nitrates and other nutrients that will be in range when formulated to make a growing media. In addition to testing a 1:1 compost: vermiculite blend, we also test a diluted 1:3 blend to indicate a more sensitive toxicity level. Is Your Compost Safe Regarding Health? Fecal Coliform < 1000 / g dry wt. Fecal coliforms can survive in both aerobic and anaerobic conditions and is common in all initial compost piles. Most human pathogens occur from fecal matter and all fecal matter is loaded in fecal coliforms. Therefore fecal coliforms are used as an indicator to determine if the chosen method for pathogen reduction (heat for compost) has met the requirements of sufficient temperature, time and mixing. If the fecal coliforms are reduced to below 1000 per gram dry wt. it is assumed all others pathogens are eliminated. Potential problems are that fecal coliform can regrow during the curing phase or during shipping. This is because the conditions are now more favorable for growth than during the composting process. Salmonella Bacteria Less than 3 3 / 4g dry wt. Salmonella is not only another indicator organism but also a toxic microbe. It has been used in the case of biosolids industry to determine adequate pathogen reduction. Metals Pass The ten heavy metals listed in the EPA 503 regulations are chosen to determine if compost can be applied to ag land and handled without toxic effects. Most high concentrations of heavy metals are derived from woodwaste feedstock such as chrome-arsenic treated or lead painted demolition wood. Biosolids are rarely a problem. Does Your Compost Provide Nutrients or Organic Matter? Nutrients (N+P2O5+K2O) 2.2 Average nutrient content This value is the sum of the primary nutrients Nitrogen, Phosphorus and Potassium. Reported units are consistent with those found on fertilizer formulations. A sum greater than 5 is indicative of a compost with high nutrient content, and best used to supply nutrients to a receiving soil. A sum below 2 indicates low nutrient content, and is best-used to improve soil structure via the addition of organic matter. Most compost falls between 2 and 5. Oct16A No. 13 05 Oct. 16 BR-1F Account No.: Date Received 6100124 - 2/2 - 7372 Sample i.d. Group: Sample I.d. No. 2/2 6100124 INTERPRETATION:Page three of three AgIndex (Nutrients/Na+Cl) 15 High nutrient ratio Composts with low AgIndex values have high concentrations of sodium and/or chloride compared to nutrients. Repeated use of a compost with a low AgIndex (< 2) may result in sodium and/or chloride acting as the limiting factor compared to nutrients, governing application rates. These composts may be used on well-draining soils and/or with salt-tolerant plants. Additional nutrients form another source may be needed if the application rate is limited by sodium or chloride. If the AgIndex is above 10, nutrients optimal for plant growth will be available without concern of sodium and/or chloride toxicity. Composts with an AgIndex of above 10 are good for increasing nutrient levels for all soils. Most composts score between 2 and 10. Concentrations of nutrients, sodium, and chloride in the receiving soil should be considered when determining compost application rates. The AgIndex is a product of feedstock quality. Feedstock from dairy manure, marine waste, industrial wastes, and halophytic plants are likely to produce a finished compost with a low AgIndex. Plant Available Nitrogen (lbs/ton) 4 Low N Provider Plant Available Nitrogen (PAN) is calculated by estimating the release rate of Nitrogen from the organic fraction of the compost. This estimate is based on information gathered from the BAC test and measured ammonia and nitrate values. Despite the PAN value of the compost, additional sources of Nitrogen may be needed during he growing season to off- set the Nitrogen demand of the microbes present in the compost. With ample nutrients these microbes can further breakdown organic matter in the compost and release bound Nitrogen. Nitrogen demand based on a high C/N ratio is not considered in the PAN calculation because additional Nitrogen should always be supplemented to the receiving soil when composts with a high C/N ratio are applied. C/N Ratio 11 Indicates maturity As a guiding principal, a C/N ratio below 14 indicates maturity and above 14 indicates immaturity, however, there are many exceptions. Large woodchips (>6.3mm), bark, and redwood are slow to breakdown and therefore can result in a relatively stable product while the C/N ratio value is high. Additionally, some composts with chicken manure and/or green grass feedstocks can start with a C/N ratio below 15 and are very unstable. A C/N ratio below 10 supplies Nitrogen, while a ratio above 20 can deplete Nitrogen from the soil. The rate at which Nitrogen will be released or used by the microbes is indicated by the respiration rate (BAC). If the respiration rate is too high the transfer of Nitrogen will not be controlable. Soluble Nutrients & Salts (EC5 w/w dw - mmhos/cm) 2.4 Average salts This value refers to all soluble ions including nutrients, sodium, chloride and some soluble organic compounds. The concentration of salts will change due to the release of salts from the organic matter as it degrades, volatilization of ammonia, decomposition of soluble organics, and conversion of molecular structure. High salts + high AgIndex is indicative of a compost high in readily available nutrients. The application rate of these composts should be limited by the optimum nutrient value based on soil analysis of the receiving soil. High Salts + low AgIndex is indicative of a compost low in nutrients with high concentrations of sodium and/or chloride. Limit the application rate according to the toxicity level of thesodium and/or chloride. Low salts indicates that the compost can be applied without risking salt toxicity, is likely a good source of organic matter, and that nutrients will release slowly over time. Lime Content (lbs. per ton) 690 High lime content Compost high in lime or carbonates are often those produced from chicken manure (layers) ash materials, and lime products. These are excellent products to use on a receiving soil where lime has been recommended by soil analysis to raise the pH. Composts with a high lime content should be closely considered for pH requirements when formulating potting mixes. Physical Properties Percent Ash 79.6 High ash content Ash is the non-organic fraction of a compost. Most composts contain approximately 50% ash (dry weight basis). Compost can be high in ash content for many reasons including: excess minerilzation(old compost), contamination with soil base material during turning, poor quality feedstock, and soil or mineral products added. Finding the source and reducing high ash content is often the fastest means to increasing nutrient quality of a compost. Particle Size % > 6.3 MM (0.25") 0.3 Suitable for all uses Large particles may restrict use for potting soils, golf course topdressings, seed-starter mixes, and where a fine size distribution is required. Composts with large particles can still be used as excellent additions to field soils, shrub mixes and mulches. Particle Size Distribution Each size fraction is measured by weight, volume and bulk density. These results are particularly relevent with decisions to screen or not, and if screening, which size screen to use. The bulk density indicates if the fraction screened is made of light weight organic material or heavy mineral material. Removing large mineral material can greatly improve compost quality by increasing nutrient and organic concentrations. Appendix: Estimated available nutrients for use when calculating application rates Plant Available Nitrogen (PAN) calculations: lbs/ton (As Rcvd.) PAN = (X * (organic N)) + ((NH4-N) + (NO3-N)) X value = If BAC < 2 then X = 0.1 Plant Available Nitrogen (PAN) 3.9 If BAC =2.1 to 5 then X = 0.2 Ammonia (NH4-N) 0.01 If BAC =5.1 to 10 then X = 0.3 Nitrate (NO3-N) 1.06 If BAC > 10 then X = 0.4 Available Phosphorus (P2O5*0.64) 6.1 Note: If C/N ratio > 15 additional N should be applied. Available Potassium (K2O) 3.4 05 Oct. 16 BR-1F Oct16A No. 13 TEL: 831-724-5422 FAX: 831-724-3188 www.compostlab.com Account #: 6100124-2/2-7372 Group: Oct16A #13 Reporting Date: Brooks Contractor 1195 Beal Rd. Attn: Amy Brooks Date Received: 05 Oct. 16 Sample Identification: BR-1F Sample ID #: 6100124 - 2/2 Metals Results Units MDL % Recovery Date Tested Arsenic (As): 3.4 mg/kg dw 1.0 92.3 12 Oct. 16 Cadmium (Cd): Less than 1.0 mg/kg dw 1.0 83.1 12 Oct. 16 Chromium (Cr): 11 mg/kg dw 1.0 83.4 12 Oct. 16 Copper (Cu): 23 mg/kg dw 1.0 91.6 12 Oct. 16 Lead (Pb): 13 mg/kg dw 1.0 81.4 12 Oct. 16 Mercury (Hg): Less than 1.0 mg/kg dw 1.0 86.5 12 Oct. 16 Molybdenum (Mo): Less than 1.0 mg/kg dw 1.0 83.3 12 Oct. 16 Nickel (Ni): 5.2 mg/kg dw 1.0 90.9 12 Oct. 16 Selenium (Se): Less than 1.0 mg/kg dw 1.0 84.7 12 Oct. 16 Zinc (Zn): 110 mg/kg dw 1.0 94.4 12 Oct. 16 Cobalt (Co) 3.4 mg/kg dw 0.50 85.8 12 Oct. 16 Total Solids (TMECC 03.09) 64 % 0.05 NA 07 Oct. 16 Bacteria Results Units MDL Date Tested Fecal Coliform Less than 7.5 MPN/g dw 2 05 Oct. 16 Salmonella Less than 3 MPN/4g dw 3 05 Oct. 16 Pollutant Loading Rate: Multiply mg/kg dry weight values times 0.0645 to give you kilograms pollutant per 100 metric ton compost as-received based on a moisture content of 35.5 percent. Method (metals): EPA 3050B / EPA 6010 Method (metals): TMECC 04.12-B / 04.14-A Method (Mercury Hg) TMECC 04.06 / EPA 7471 Method (Fecal Coliform): Standard Methods 9221E Method (Salmonella): TMECC 07.02-A Analyst: Assaf Sadeh Goldston, NC 27252 October 20, 2016 Metals & Bacteria TEL: 831-724-5422 FAX: 831-724-3188 www.compostlab.com Account #: 7010489-3/3-7372 Group: Jan17C #43 Reporting Date: Brooks Contractor 1195 Beal Rd. Goldston, NC 27252 Attn: Amy Brooks Date Received: 19 Jan. 17 Sample Identification: BR-1L Sample ID #: 7010489 - 3/3 Nutrients Dry wt. As Rcvd. units Stability Indicator:Biologically Total Nitrogen:0.99 0.45 %CO2 Evolution Respirometery Available C Ammonia (NH4-N):< 10 < 4.5 mg/kg mg CO2-C/g OM/day 1.6 1.7 Nitrate (NO3-N):41 19 mg/kg mg CO2-C/g TS/day 0.70 0.74 Org. Nitrogen (Org.-N):0.99 0.45 % Stability Rating very stable very stable Phosphorus (as P2O5):0.29 0.13 % Phosphorus (P):1300 580 mg/kg Potassium (as K2O):0.40 0.18 %Maturity Indicator: Cucumber Bioassay Potassium (K):3300 1500 mg/kg Compost:Vermiculite(v:v) 1:2 Calcium (Ca):3.4 1.6 % Emergence (%) 100 Magnesium (Mg):0.38 0.17 % Seedling Vigor (%) 115 Sulfate (SO4-S):2.6 1.2 mg/kg Description of Plants healthy Boron (Total B):16 7.3 mg/kg Moisture:0 54.8 % Sodium (Na):0.060 0.027 %Pathogens Results Units Rating Chloride (Cl):0.036 0.016 % Fecal Coliform < 7.5 MPN/g pass pH Value:NA 8.05 unit Salmonella < 3 MPN/4g pass Bulk Density :21 46 lb/cu ft Date Tested: 19 Jan. 17 Carbonates (CaCO3):67 30 lb/ton Conductivity (EC5):0.63 NA mmhos/cm Organic Matter:44.5 20.1 %Inerts % by weight Organic Carbon:21.0 9.5 % Plastic < 0.5 Ash:55.5 25.1 % Glass < 0.5 C/N Ratio 21 21 ratio Metal < 0.5 AgIndex > 10 > 10 ratio Sharps ND Metals Dry wt. EPA Limit units Size Distribution Aluminum (Al): 7600 - mg/kg MM % by weight Arsenic (As): 3.9 41 mg/kg > 50 0.0 Cadmium (Cd): < 1.0 39 mg/kg 25 to 50 0.0 Chromium (Cr): 14 1200 mg/kg 16 to 25 0.3 Cobalt (Co) 5.4 - mg/kg 9.5 to 16 6.8 Copper (Cu): 22 1500 mg/kg 6.3 to 9.5 5.8 Iron (Fe): 13000 - mg/kg 4.0 to 6.3 8.5 Lead (Pb): 6.6 300 mg/kg 2.0 to 4.0 13.4 Manganese (Mn): 640 - mg/kg < 2.0 65.1 Mercury (Hg): < 1.0 17 mg/kg Molybdenum (Mo): < 1.0 75 mg/kg Nickel (Ni): 11 420 mg/kg Analyst: Assaf Sadeh Selenium (Se): < 1.0 36 mg/kg Zinc (Zn): 76 2800 mg/kg *Sample was received and handled in accordance with TMECC procedures. February 2, 2017 Account No.: Date Received 19 Jan. 17 7010489 - 3/3 - 7372 Sample i.d. Group: Sample I.d. No. 3/3 7010489 INTERPRETATION:Page one of three Is Your Compost Stable? Respiration Rate Biodegradation Rate of Your Pile 1.6 mg CO2-C/ g OM/day Biologically Available Carbon (BAC)Optimum Degradation Rate 1.7 mg CO2-C/ g OM/day Is Your Compost Mature? 0.19 Ratio Ammonia N ppm <10 mg/kg dry wt. Nitrate N ppm 41 mg/kg dry wt. pH value 8.05 units Cucumber Emergence 100.0 percent Is Your Compost Safe Regarding Health? Fecal Coliform < 1000 MPN/g dry wt. Salmonella Less than 3 /4g dry wt. Metals US EPA 503 Pass dry wt. Does Your Compost Provide Nutrients or Organic Matter? Nutrients (N+P2O5+K2O) 1.7 Percent dry wt. AgIndex (Nutrients / Sodium and Chloride Salts)((N+P2O5+K2O) / (Na + Cl)) 15 Ratio Plant Available Nitrogen (PAN)Estimated release for first season 1 lbs/ton wet wt. C/N Ratio 21 Ratio Soluble Available Nutrients & Salts (EC5 w/w dw) 0.63 mmhos/cm dry wt. Lime Content (CaCO3) 67 Lbs/ton dry wt. What are the physical properties of your compost? Percent Ash 55.5 Percent +++++++++++++++++++++++++++++++++++++++++++ dry wt. Sieve Size % > 6.3 MM (0.25") 13.0 Percent dry wt. < Stable >|<Moderately Unstable>|< Unstable >|< High For Mulch AmmoniaN/NitrateN ratio +++ BR-1L ++++++ < Stable >|<Moderately Unstable>|< Unstable >|< High For Mulch ++++++ VeryMature>|< Mature >|< Immature + VeryMature>|< Mature >|< Immature ++++++++++++++++++++++++++++++++ < Immature >|< Mature +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ < Immature >|< Mature >|< Immature +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ < Immature >|< Mature +++++++ < Safe >|< High Fecal Coliform +++++++ <Safe (none detected) >|< High Salmonella Count(> 3 per 4 grams) +++++++++ <All Metals Pass >|< One or more Metals Fail +++++++++++++++++++++++++++++++++++++++++ +++++++++++++ <Low >|< Average >|< High Nutrient Content +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Na & Cl >|< Nutrient and Sodium and Chloride Provider >|< Nutrient Provider < Low >|< Average >|< High Lime Content (as CaCO3) < High Organic Matter >|< Average >|< High Ash Content ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ All Uses >|< Size May Restrict Uses for Potting mix and Golf Courses Low Nitrogen Provider>|< Average Nitrogen Provider >|<High Nitrogen Provider Jan17C No. 43 < Nitrogen Release >|< N-Neutral >|< N-Demand>|< High Nitrogen Demand +++ SloRelease>|< Average Nutrient Release Rate >|<High Available Nutrients ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ +++ Account No.: Date Received 7010489 - 3/3 - 7372 Sample i.d. Group: Sample I.d. No. 3/3 7010489 INTERPRETATION: Is Your Compost Stable?Page two of three Respiration Rate 1.6 Low: Good for all uses mg CO2-C/g OM/day The respiration rate is a measurement of the biodegradation rate of the organic matter in the sample (as received). The respiration rate is determined by measuring the rate at which CO2 is released under optimized moisture and temperature conditions. Biologically Available Carbon 1.7 Low: Good for all uses mg CO2-C/g OM/day Biologically Available Carbon (BAC) is a measurement of the rate at which CO2 is released under optimized moisture, temperature, porosity, nutrients, pH and microbial conditions. If both the RR and the BAC test values are close to the same value, the pile is optimized for composting. If both values are high the compost pile just needs more time. If both values are low the compost has stabilized and should be moved to curing. BAC test values that are higher than RR indicate that the compost pile has stalled. This could be due to anaerobic conditions, lack of available nitrogen due to excessive air converting ammonia to the unavailable nitrate form, lack of nitrogen or other nutrients due to poor choice of feedstock, pH value out of range, or microbes rendered non-active. Is Your Compost Mature? AmmoniaN:NitrateN ratio 0.19 very mature Composting to stabilize carbon can occur at such a rapid rate that sometimes phytotoxins remain in the compost and must be neutralized before using in high concentrations or in high-end uses. This Ammonia N ppm step is called curing. Typically ammonia is in excess with the break-down of organic materials resulting <10 NA in an increase in pH. This combination results in a loss of volatile ammonia (it smells). Once this toxic Nitrate N ppm ammonia has been reduced and the pH drops, the microbes convert the ammonia to nitrates. A low 41 immature ammonia + high nitrate score is indicative of a mature compost, however there are many exceptions. pH value For example, a compost with a low pH (<7) will retain ammonia, while a compost with high lime content 8.05 mature can lose ammonia before the organic fraction becomes stable. Composts must first be stable before curing indicators apply. Cucumber Bioassay 100.0 Percent Cucumbers are chosen for this test because they are salt tolerant and very sensitive to ammonia and organic acid toxicity. Therefore, we can germinate seeds in high concentrations of compost to measure phytotoxic effects without soluble salts being the limiting factor. Values above 80% for both percent emergence and vigor are indicative of a well-cured compost. Exceptions include very high salts that affect the cucumbers, excessive concentrations of nitrates and other nutrients that will be in range when formulated to make a growing media. In addition to testing a 1:1 compost: vermiculite blend, we also test a diluted 1:3 blend to indicate a more sensitive toxicity level. Is Your Compost Safe Regarding Health? Fecal Coliform < 1000 / g dry wt. Fecal coliforms can survive in both aerobic and anaerobic conditions and is common in all initial compost piles. Most human pathogens occur from fecal matter and all fecal matter is loaded in fecal coliforms. Therefore fecal coliforms are used as an indicator to determine if the chosen method for pathogen reduction (heat for compost) has met the requirements of sufficient temperature, time and mixing. If the fecal coliforms are reduced to below 1000 per gram dry wt. it is assumed all others pathogens are eliminated. Potential problems are that fecal coliform can regrow during the curing phase or during shipping. This is because the conditions are now more favorable for growth than during the composting process. Salmonella Bacteria Less than 3 3 / 4g dry wt. Salmonella is not only another indicator organism but also a toxic microbe. It has been used in the case of biosolids industry to determine adequate pathogen reduction. Metals Pass The ten heavy metals listed in the EPA 503 regulations are chosen to determine if compost can be applied to ag land and handled without toxic effects. Most high concentrations of heavy metals are derived from woodwaste feedstock such as chrome-arsenic treated or lead painted demolition wood. Biosolids are rarely a problem. Does Your Compost Provide Nutrients or Organic Matter? Nutrients (N+P2O5+K2O) 1.7 low nutrient content This value is the sum of the primary nutrients Nitrogen, Phosphorus and Potassium. Reported units are consistent with those found on fertilizer formulations. A sum greater than 5 is indicative of a compost with high nutrient content, and best used to supply nutrients to a receiving soil. A sum below 2 indicates low nutrient content, and is best-used to improve soil structure via the addition of organic matter. Most compost falls between 2 and 5. BR-1L 19 Jan. 17 Jan17C No. 43 Account No.: Date Received 7010489 - 3/3 - 7372 Sample i.d. Group: Sample I.d. No. 3/3 7010489 INTERPRETATION:Page three of three AgIndex (Nutrients/Na+Cl) 15 High nutrient ratio Composts with low AgIndex values have high concentrations of sodium and/or chloride compared to nutrients. Repeated use of a compost with a low AgIndex (< 2) may result in sodium and/or chloride acting as the limiting factor compared to nutrients, governing application rates. These composts may be used on well-draining soils and/or with salt-tolerant plants. Additional nutrients form another source may be needed if the application rate is limited by sodium or chloride. If the AgIndex is above 10, nutrients optimal for plant growth will be available without concern of sodium and/or chloride toxicity. Composts with an AgIndex of above 10 are good for increasing nutrient levels for all soils. Most composts score between 2 and 10. Concentrations of nutrients, sodium, and chloride in the receiving soil should be considered when determining compost application rates. The AgIndex is a product of feedstock quality. Feedstock from dairy manure, marine waste, industrial wastes, and halophytic plants are likely to produce a finished compost with a low AgIndex. Plant Available Nitrogen (lbs/ton) 1 Low N Provider Plant Available Nitrogen (PAN) is calculated by estimating the release rate of Nitrogen from the organic fraction of the compost. This estimate is based on information gathered from the BAC test and measured ammonia and nitrate values. Despite the PAN value of the compost, additional sources of Nitrogen may be needed during he growing season to off- set the Nitrogen demand of the microbes present in the compost. With ample nutrients these microbes can further breakdown organic matter in the compost and release bound Nitrogen. Nitrogen demand based on a high C/N ratio is not considered in the PAN calculation because additional Nitrogen should always be supplemented to the receiving soil when composts with a high C/N ratio are applied. C/N Ratio 21 Indicates immaturity As a guiding principal, a C/N ratio below 14 indicates maturity and above 14 indicates immaturity, however, there are many exceptions. Large woodchips (>6.3mm), bark, and redwood are slow to breakdown and therefore can result in a relatively stable product while the C/N ratio value is high. Additionally, some composts with chicken manure and/or green grass feedstocks can start with a C/N ratio below 15 and are very unstable. A C/N ratio below 10 supplies Nitrogen, while a ratio above 20 can deplete Nitrogen from the soil. The rate at which Nitrogen will be released or used by the microbes is indicated by the respiration rate (BAC). If the respiration rate is too high the transfer of Nitrogen will not be controlable. Soluble Nutrients & Salts (EC5 w/w dw - mmhos/cm) 0.63 Low salts This value refers to all soluble ions including nutrients, sodium, chloride and some soluble organic compounds. The concentration of salts will change due to the release of salts from the organic matter as it degrades, volatilization of ammonia, decomposition of soluble organics, and conversion of molecular structure. High salts + high AgIndex is indicative of a compost high in readily available nutrients. The application rate of these composts should be limited by the optimum nutrient value based on soil analysis of the receiving soil. High Salts + low AgIndex is indicative of a compost low in nutrients with high concentrations of sodium and/or chloride. Limit the application rate according to the toxicity level of thesodium and/or chloride. Low salts indicates that the compost can be applied without risking salt toxicity, is likely a good source of organic matter, and that nutrients will release slowly over time. Lime Content (lbs. per ton) 67 High lime content Compost high in lime or carbonates are often those produced from chicken manure (layers) ash materials, and lime products. These are excellent products to use on a receiving soil where lime has been recommended by soil analysis to raise the pH. Composts with a high lime content should be closely considered for pH requirements when formulating potting mixes. Physical Properties Percent Ash 55.5 Average ash content Ash is the non-organic fraction of a compost. Most composts contain approximately 50% ash (dry weight basis). Compost can be high in ash content for many reasons including: excess minerilzation(old compost), contamination with soil base material during turning, poor quality feedstock, and soil or mineral products added. Finding the source and reducing high ash content is often the fastest means to increasing nutrient quality of a compost. Particle Size % > 6.3 MM (0.25") 13.0 May restrict use Large particles may restrict use for potting soils, golf course topdressings, seed-starter mixes, and where a fine size distribution is required. Composts with large particles can still be used as excellent additions to field soils, shrub mixes and mulches. Particle Size Distribution Each size fraction is measured by weight, volume and bulk density. These results are particularly relevent with decisions to screen or not, and if screening, which size screen to use. The bulk density indicates if the fraction screened is made of light weight organic material or heavy mineral material. Removing large mineral material can greatly improve compost quality by increasing nutrient and organic concentrations. Appendix: Estimated available nutrients for use when calculating application rates Plant Available Nitrogen (PAN) calculations: lbs/ton (As Rcvd.) PAN = (X * (organic N)) + ((NH4-N) + (NO3-N)) X value = If BAC < 2 then X = 0.1 Plant Available Nitrogen (PAN) 0.9 If BAC =2.1 to 5 then X = 0.2 Ammonia (NH4-N) 0.01 If BAC =5.1 to 10 then X = 0.3 Nitrate (NO3-N) 0.04 If BAC > 10 then X = 0.4 Available Phosphorus (P2O5*0.64) 1.7 Note: If C/N ratio > 15 additional N should be applied. Available Potassium (K2O) 3.6 19 Jan. 17 BR-1L Jan17C No. 43 TEL: 831-724-5422 FAX: 831-724-3188 www.compostlab.com Account #: 7010489-3/3-7372 Group: Jan17C #43 Reporting Date: Brooks Contractor 1195 Beal Rd. Attn: Amy Brooks Date Received: 19 Jan. 17 Sample Identification: BR-1L Sample ID #: 7010489 - 3/3 Metals Results Units MDL % Recovery Date Tested Arsenic (As): 3.9 mg/kg dw 1.0 92.8 25 Jan. 17 Cadmium (Cd): Less than 1.0 mg/kg dw 1.0 83.4 25 Jan. 17 Chromium (Cr): 14 mg/kg dw 1.0 85.8 25 Jan. 17 Copper (Cu): 22 mg/kg dw 1.0 96.5 25 Jan. 17 Lead (Pb): 6.6 mg/kg dw 1.0 83.7 25 Jan. 17 Mercury (Hg): Less than 1.0 mg/kg dw 1.0 92.4 25 Jan. 17 Molybdenum (Mo): Less than 1.0 mg/kg dw 1.0 82.1 25 Jan. 17 Nickel (Ni): 11 mg/kg dw 1.0 98.3 25 Jan. 17 Selenium (Se): Less than 1.0 mg/kg dw 1.0 81.3 25 Jan. 17 Zinc (Zn): 76 mg/kg dw 1.0 94.9 25 Jan. 17 Cobalt (Co) 5.4 mg/kg dw 0.50 92.2 25 Jan. 17 Total Solids (TMECC 03.09) 45 % 0.05 NA 20 Jan. 17 Bacteria Results Units MDL Date Tested Fecal Coliform Less than 7.5 MPN/g dw 7.5 19 Jan. 17 Salmonella Less than 3 MPN/4g dw 3 19 Jan. 17 Pollutant Loading Rate: Multiply mg/kg dry weight values times 0.0452 to give you kilograms pollutant per 100 metric ton compost as-received based on a moisture content of 54.8 percent. Method (metals): EPA 3050B / EPA 6010 Method (metals): TMECC 04.12-B / 04.14-A Method (Mercury Hg) TMECC 04.06 / EPA 7471 Method (Fecal Coliform): Standard Methods 9221E Method (Salmonella): TMECC 07.02-A Analyst: Assaf Sadeh Goldston, NC 27252 December 8, 2016 Metals & Bacteria TEL: 831-724-5422 FAX: 831-724-3188 www.compostlab.com Account #: 7020476-2/2-7372 Group: Feb17D #6 Reporting Date: Brooks Contractor 1195 Beal Rd. Goldston, NC 27252 Attn: Amy Brooks Date Received: 22 Feb. 17 Sample Identification: BR-1LNOP Sample ID #: 7020476 - 2/2 Nutrients Dry wt. As Rcvd. units Stability Indicator:Biologically Total Nitrogen:1.2 0.58 %CO2 Evolution Respirometery Available C Ammonia (NH4-N):29 14 mg/kg mg CO2-C/g OM/day 1.4 1.4 Nitrate (NO3-N):170 83 mg/kg mg CO2-C/g TS/day 0.59 0.59 Org. Nitrogen (Org.-N):1.2 0.58 % Stability Rating very stable very stable Phosphorus (as P2O5):0.28 0.14 % Phosphorus (P):1200 600 mg/kg Potassium (as K2O):0.34 0.17 %Maturity Indicator: Cucumber Bioassay Potassium (K):2800 1400 mg/kg Compost:Vermiculite(v:v) 1:2 Calcium (Ca):4.5 2.2 % Emergence (%) 100 Magnesium (Mg):0.32 0.15 % Seedling Vigor (%) 107 Sulfate (SO4-S):32 15 mg/kg Description of Plants healthy Boron (Total B):19 9.1 mg/kg Moisture:0 51.8 % Sodium (Na):0.059 0.028 %Pathogens Results Units Rating Chloride (Cl):0.057 0.027 % Fecal Coliform 36 MPN/g pass pH Value:NA 7.75 unit Salmonella < 3 MPN/4g pass Bulk Density :21 44 lb/cu ft Date Tested: 22 Feb. 17 Carbonates (CaCO3):290 140 lb/ton Conductivity (EC5):1.1 NA mmhos/cm Organic Matter:43.2 20.8 %Inerts % by weight Organic Carbon:22.0 10.0 % Plastic < 0.5 Ash:56.8 27.4 % Glass < 0.5 C/N Ratio 18 18 ratio Metal < 0.5 AgIndex > 10 > 10 ratio Sharps ND Metals Dry wt. EPA Limit units Size Distribution Aluminum (Al): 5200 - mg/kg MM % by weight Arsenic (As): 3.6 41 mg/kg > 50 0.0 Cadmium (Cd): < 1.0 39 mg/kg 25 to 50 0.0 Chromium (Cr): 17 1200 mg/kg 16 to 25 0.0 Cobalt (Co) 5.7 - mg/kg 9.5 to 16 0.8 Copper (Cu): 20 1500 mg/kg 6.3 to 9.5 4.0 Iron (Fe): 9600 - mg/kg 4.0 to 6.3 7.6 Lead (Pb): 6.7 300 mg/kg 2.0 to 4.0 13.9 Manganese (Mn): 710 - mg/kg < 2.0 73.6 Mercury (Hg): < 1.0 17 mg/kg Molybdenum (Mo): < 1.0 75 mg/kg Nickel (Ni): 11 420 mg/kg Analyst: Assaf Sadeh Selenium (Se): < 1.0 36 mg/kg Zinc (Zn): 68 2800 mg/kg *Sample was received and handled in accordance with TMECC procedures. March 4, 2017 Account No.: Date Received 22 Feb. 17 7020476 - 2/2 - 7372 Sample i.d. Group: Sample I.d. No. 2/2 7020476 INTERPRETATION:Page one of three Is Your Compost Stable? Respiration Rate Biodegradation Rate of Your Pile 1.4 mg CO2-C/ g OM/day Biologically Available Carbon (BAC)Optimum Degradation Rate 1.4 mg CO2-C/ g OM/day Is Your Compost Mature? 0.17 Ratio Ammonia N ppm 29 mg/kg dry wt. Nitrate N ppm 170 mg/kg dry wt. pH value 7.75 units Cucumber Emergence 100.0 percent Is Your Compost Safe Regarding Health? Fecal Coliform < 1000 MPN/g dry wt. Salmonella Less than 3 /4g dry wt. Metals US EPA 503 Pass dry wt. Does Your Compost Provide Nutrients or Organic Matter? Nutrients (N+P2O5+K2O) 1.8 Percent dry wt. AgIndex (Nutrients / Sodium and Chloride Salts)((N+P2O5+K2O) / (Na + Cl)) 15 Ratio Plant Available Nitrogen (PAN)Estimated release for first season 1 lbs/ton wet wt. C/N Ratio 18 Ratio Soluble Available Nutrients & Salts (EC5 w/w dw) 1.1 mmhos/cm dry wt. Lime Content (CaCO3) 290 Lbs/ton dry wt. What are the physical properties of your compost? Percent Ash 56.8 Percent ++++++++++++++++++++++++++++++++++++++++++++ dry wt. Sieve Size % > 6.3 MM (0.25") 4.8 Percent dry wt. < Stable >|<Moderately Unstable>|< Unstable >|< High For Mulch AmmoniaN/NitrateN ratio +++ BR-1LNOP +++++ < Stable >|<Moderately Unstable>|< Unstable >|< High For Mulch +++++ VeryMature>|< Mature >|< Immature +++ VeryMature>|< Mature >|< Immature ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ < Immature >|< Mature +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ < Immature >|< Mature >|< Immature +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ < Immature >|< Mature +++++++ < Safe >|< High Fecal Coliform +++++++ <Safe (none detected) >|< High Salmonella Count(> 3 per 4 grams) +++++++++ <All Metals Pass >|< One or more Metals Fail +++++++++++++++++++++++++++++++++++ ++++++++++++++ <Low >|< Average >|< High Nutrient Content +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Na & Cl >|< Nutrient and Sodium and Chloride Provider >|< Nutrient Provider < Low >|< Average >|< High Lime Content (as CaCO3) < High Organic Matter >|< Average >|< High Ash Content ++++++++++++++++++++++++++++++++++++++ All Uses >|< Size May Restrict Uses for Potting mix and Golf Courses Low Nitrogen Provider>|< Average Nitrogen Provider >|<High Nitrogen Provider Feb17D No. 6 < Nitrogen Release >|< N-Neutral >|< N-Demand>|< High Nitrogen Demand +++++ SloRelease>|< Average Nutrient Release Rate >|<High Available Nutrients ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ +++++ Account No.: Date Received 7020476 - 2/2 - 7372 Sample i.d. Group: Sample I.d. No. 2/2 7020476 INTERPRETATION: Is Your Compost Stable?Page two of three Respiration Rate 1.4 Low: Good for all uses mg CO2-C/g OM/day The respiration rate is a measurement of the biodegradation rate of the organic matter in the sample (as received). The respiration rate is determined by measuring the rate at which CO2 is released under optimized moisture and temperature conditions. Biologically Available Carbon 1.4 Low: Good for all uses mg CO2-C/g OM/day Biologically Available Carbon (BAC) is a measurement of the rate at which CO2 is released under optimized moisture, temperature, porosity, nutrients, pH and microbial conditions. If both the RR and the BAC test values are close to the same value, the pile is optimized for composting. If both values are high the compost pile just needs more time. If both values are low the compost has stabilized and should be moved to curing. BAC test values that are higher than RR indicate that the compost pile has stalled. This could be due to anaerobic conditions, lack of available nitrogen due to excessive air converting ammonia to the unavailable nitrate form, lack of nitrogen or other nutrients due to poor choice of feedstock, pH value out of range, or microbes rendered non-active. Is Your Compost Mature? AmmoniaN:NitrateN ratio 0.17 very mature Composting to stabilize carbon can occur at such a rapid rate that sometimes phytotoxins remain in the compost and must be neutralized before using in high concentrations or in high-end uses. This Ammonia N ppm step is called curing. Typically ammonia is in excess with the break-down of organic materials resulting 29 very mature in an increase in pH. This combination results in a loss of volatile ammonia (it smells). Once this toxic Nitrate N ppm ammonia has been reduced and the pH drops, the microbes convert the ammonia to nitrates. A low 170 mature ammonia + high nitrate score is indicative of a mature compost, however there are many exceptions. pH value For example, a compost with a low pH (<7) will retain ammonia, while a compost with high lime content 7.75 mature can lose ammonia before the organic fraction becomes stable. Composts must first be stable before curing indicators apply. Cucumber Bioassay 100.0 Percent Cucumbers are chosen for this test because they are salt tolerant and very sensitive to ammonia and organic acid toxicity. Therefore, we can germinate seeds in high concentrations of compost to measure phytotoxic effects without soluble salts being the limiting factor. Values above 80% for both percent emergence and vigor are indicative of a well-cured compost. Exceptions include very high salts that affect the cucumbers, excessive concentrations of nitrates and other nutrients that will be in range when formulated to make a growing media. Is Your Compost Safe Regarding Health? Fecal Coliform < 1000 / g dry wt. Fecal coliforms can survive in both aerobic and anaerobic conditions and is common in all initial compost piles. Most human pathogens occur from fecal matter and all fecal matter is loaded in fecal coliforms. Therefore fecal coliforms are used as an indicator to determine if the chosen method for pathogen reduction (heat for compost) has met the requirements of sufficient temperature, time and mixing. If the fecal coliforms are reduced to below 1000 per gram dry wt. it is assumed all others pathogens are eliminated. Potential problems are that fecal coliform can regrow during the curing phase or during shipping. This is because the conditions are now more favorable for growth than during the composting process. Salmonella Bacteria Less than 3 3 / 4g dry wt. Salmonella is not only another indicator organism but also a toxic microbe. It has been used in the case of biosolids industry to determine adequate pathogen reduction. Metals Pass The ten heavy metals listed in the EPA 503 regulations are chosen to determine if compost can be applied to ag land and handled without toxic effects. Most high concentrations of heavy metals are derived from woodwaste feedstock such as chrome-arsenic treated or lead painted demolition wood. Biosolids are rarely a problem. Does Your Compost Provide Nutrients or Organic Matter? Nutrients (N+P2O5+K2O) 1.8 low nutrient content This value is the sum of the primary nutrients Nitrogen, Phosphorus and Potassium. Reported units are consistent with those found on fertilizer formulations. A sum greater than 5 is indicative of a compost with high nutrient content, and best used to supply nutrients to a receiving soil. A sum below 2 indicates low nutrient content, and is best-used to improve soil structure via the addition of organic matter. Most compost falls between 2 and 5. BR-1LNOP 22 Feb. 17 Feb17D No. 6 Account No.: Date Received 7020476 - 2/2 - 7372 Sample i.d. Group: Sample I.d. No. 2/2 7020476 INTERPRETATION:Page three of three AgIndex (Nutrients/Na+Cl) 15 High nutrient ratio Composts with low AgIndex values have high concentrations of sodium and/or chloride compared to nutrients. Repeated use of a compost with a low AgIndex (< 2) may result in sodium and/or chloride acting as the limiting factor compared to nutrients, governing application rates. These composts may be used on well-draining soils and/or with salt-tolerant plants. Additional nutrients form another source may be needed if the application rate is limited by sodium or chloride. If the AgIndex is above 10, nutrients optimal for plant growth will be available without concern of sodium and/or chloride toxicity. Composts with an AgIndex of above 10 are good for increasing nutrient levels for all soils. Most composts score between 2 and 10. Concentrations of nutrients, sodium, and chloride in the receiving soil should be considered when determining compost application rates. The AgIndex is a product of feedstock quality. Feedstock from dairy manure, marine waste, industrial wastes, and halophytic plants are likely to produce a finished compost with a low AgIndex. Plant Available Nitrogen (lbs/ton) 1 Low N Provider Plant Available Nitrogen (PAN) is calculated by estimating the release rate of Nitrogen from the organic fraction of the compost. This estimate is based on information gathered from the BAC test and measured ammonia and nitrate values. Despite the PAN value of the compost, additional sources of Nitrogen may be needed during he growing season to off- set the Nitrogen demand of the microbes present in the compost. With ample nutrients these microbes can further breakdown organic matter in the compost and release bound Nitrogen. Nitrogen demand based on a high C/N ratio is not considered in the PAN calculation because additional Nitrogen should always be supplemented to the receiving soil when composts with a high C/N ratio are applied. C/N Ratio 18 Indicates immaturity As a guiding principal, a C/N ratio below 14 indicates maturity and above 14 indicates immaturity, however, there are many exceptions. Large woodchips (>6.3mm), bark, and redwood are slow to breakdown and therefore can result in a relatively stable product while the C/N ratio value is high. Additionally, some composts with chicken manure and/or green grass feedstocks can start with a C/N ratio below 15 and are very unstable. A C/N ratio below 10 supplies Nitrogen, while a ratio above 20 can deplete Nitrogen from the soil. The rate at which Nitrogen will be released or used by the microbes is indicated by the respiration rate (BAC). If the respiration rate is too high the transfer of Nitrogen will not be controlable. Soluble Nutrients & Salts (EC5 w/w dw - mmhos/cm) 1.1 Average salts This value refers to all soluble ions including nutrients, sodium, chloride and some soluble organic compounds. The concentration of salts will change due to the release of salts from the organic matter as it degrades, volatilization of ammonia, decomposition of soluble organics, and conversion of molecular structure. High salts + high AgIndex is indicative of a compost high in readily available nutrients. The application rate of these composts should be limited by the optimum nutrient value based on soil analysis of the receiving soil. High Salts + low AgIndex is indicative of a compost low in nutrients with high concentrations of sodium and/or chloride. Limit the application rate according to the toxicity level of thesodium and/or chloride. Low salts indicates that the compost can be applied without risking salt toxicity, is likely a good source of organic matter, and that nutrients will release slowly over time. Lime Content (lbs. per ton) 290 High lime content Compost high in lime or carbonates are often those produced from chicken manure (layers) ash materials, and lime products. These are excellent products to use on a receiving soil where lime has been recommended by soil analysis to raise the pH. Composts with a high lime content should be closely considered for pH requirements when formulating potting mixes. Physical Properties Percent Ash 56.8 Average ash content Ash is the non-organic fraction of a compost. Most composts contain approximately 50% ash (dry weight basis). Compost can be high in ash content for many reasons including: excess minerilzation(old compost), contamination with soil base material during turning, poor quality feedstock, and soil or mineral products added. Finding the source and reducing high ash content is often the fastest means to increasing nutrient quality of a compost. Particle Size % > 6.3 MM (0.25") 4.8 May restrict use Large particles may restrict use for potting soils, golf course topdressings, seed-starter mixes, and where a fine size distribution is required. Composts with large particles can still be used as excellent additions to field soils, shrub mixes and mulches. Particle Size Distribution Each size fraction is measured by weight, volume and bulk density. These results are particularly relevent with decisions to screen or not, and if screening, which size screen to use. The bulk density indicates if the fraction screened is made of light weight organic material or heavy mineral material. Removing large mineral material can greatly improve compost quality by increasing nutrient and organic concentrations. Appendix: Estimated available nutrients for use when calculating application rates Plant Available Nitrogen (PAN) calculations: lbs/ton (As Rcvd.) PAN = (X * (organic N)) + ((NH4-N) + (NO3-N)) X value = If BAC < 2 then X = 0.1 Plant Available Nitrogen (PAN) 1.3 If BAC =2.1 to 5 then X = 0.2 Ammonia (NH4-N) 0.03 If BAC =5.1 to 10 then X = 0.3 Nitrate (NO3-N) 0.17 If BAC > 10 then X = 0.4 Available Phosphorus (P2O5*0.64) 1.7 Note: If C/N ratio > 15 additional N should be applied. Available Potassium (K2O) 3.4 22 Feb. 17 BR-1LNOP Feb17D No. 6 TEL: 831-724-5422 FAX: 831-724-3188 www.compostlab.com Account #: 7020476-2/2-7372 Group: Feb17D #6 Reporting Date: Brooks Contractor 1195 Beal Rd. Attn: Amy Brooks Date Received: 22 Feb. 17 Sample Identification: BR-1LNOP Sample ID #: 7020476 - 2/2 Metals Results Units MDL % Recovery Date Tested Arsenic (As): 3.6 mg/kg dw 1.0 93.9 28 Feb. 17 Cadmium (Cd): Less than 1.0 mg/kg dw 1.0 84.9 28 Feb. 17 Chromium (Cr): 17 mg/kg dw 1.0 87.0 28 Feb. 17 Copper (Cu): 20 mg/kg dw 1.0 90.1 28 Feb. 17 Lead (Pb): 6.7 mg/kg dw 1.0 82.5 28 Feb. 17 Mercury (Hg): Less than 1.0 mg/kg dw 1.0 87.7 28 Feb. 17 Molybdenum (Mo): Less than 1.0 mg/kg dw 1.0 84.5 28 Feb. 17 Nickel (Ni): 11 mg/kg dw 1.0 95.8 28 Feb. 17 Selenium (Se): Less than 1.0 mg/kg dw 1.0 81.1 28 Feb. 17 Zinc (Zn): 68 mg/kg dw 1.0 90.7 28 Feb. 17 Cobalt (Co) 5.7 mg/kg dw 0.50 88.6 28 Feb. 17 Total Solids (TMECC 03.09) 48 % 0.05 NA 24 Feb. 17 Bacteria Results Units MDL Date Tested Fecal Coliform 36 MPN/g dw 22 Feb. 17 Salmonella Less than 3 MPN/4g dw 3 22 Feb. 17 Pollutant Loading Rate: Multiply mg/kg dry weight values times 0.0482 to give you kilograms pollutant per 100 metric ton compost as-received based on a moisture content of 51.8 percent. Method (metals): EPA 3050B / EPA 6010 Method (metals): TMECC 04.12-B / 04.14-A Method (Mercury Hg) TMECC 04.06 / EPA 7471 Method (Fecal Coliform): Standard Methods 9221E Method (Salmonella): TMECC 07.02-A Analyst: Assaf Sadeh Goldston, NC 27252 December 8, 2016 Metals & Bacteria TEL: 831-724-5422 FAX: 831-724-3188 www.compostlab.com Account #: 7060976-2/3-7372 Group: Jun17E #7 Reporting Date: Brooks Contractor 1195 Beal Rd. Goldston, NC 27252 Attn: Amy Brooks Date Received: 27 Jun. 17 Sample Identification: BR-1NOP Sample ID #: 7060976 - 2/3 Nutrients Dry wt. As Rcvd. units Stability Indicator:Biologically Total Nitrogen:1.2 0.73 %CO2 Evolution Respirometery Available C Ammonia (NH4-N):< 10 < 6.1 mg/kg mg CO2-C/g OM/day 1.4 1.5 Nitrate (NO3-N):300 180 mg/kg mg CO2-C/g TS/day 0.35 0.37 Org. Nitrogen (Org.-N):1.2 0.74 % Stability Rating very stable very stable Phosphorus (as P2O5):0.32 0.20 % Phosphorus (P):1400 870 mg/kg Potassium (as K2O):0.13 0.083 %Maturity Indicator: Cucumber Bioassay Potassium (K):1100 690 mg/kg Compost:Vermiculite(v:v) 1:2 Calcium (Ca):11 6.9 % Emergence (%) 100 Magnesium (Mg):0.21 0.13 % Seedling Vigor (%) 120 Sulfate (SO4-S):130 80 mg/kg Description of Plants Boron (Total B):6.8 4.2 mg/kg Moisture:0 38.6 % Sodium (Na):0.053 0.032 %Pathogens Results Units Rating Chloride (Cl):0.038 0.024 % Fecal Coliform 85 MPN/g pass pH Value:NA 7.60 unit Salmonella < 3 MPN/4g pass Bulk Density :37 60 lb/cu ft Date Tested: 27 Jun. 17 Carbonates (CaCO3):680 420 lb/ton Conductivity (EC5):1.3 NA mmhos/cm Organic Matter:25.3 15.6 %Inerts % by weight Organic Carbon:14.0 8.5 % Plastic < 0.5 Ash:74.7 45.9 % Glass < 0.5 C/N Ratio 12 12 ratio Metal < 0.5 AgIndex > 10 > 10 ratio Sharps ND Metals Dry wt. EPA Limit units Size Distribution Aluminum (Al): 2700 - mg/kg MM % by weight Arsenic (As): 1.5 41 mg/kg > 50 0.0 Cadmium (Cd): < 1.0 39 mg/kg 25 to 50 0.0 Chromium (Cr): 5.1 1200 mg/kg 16 to 25 0.0 Cobalt (Co) 1.7 - mg/kg 9.5 to 16 0.4 Copper (Cu): 8.9 1500 mg/kg 6.3 to 9.5 0.9 Iron (Fe): 4600 - mg/kg 4.0 to 6.3 2.9 Lead (Pb): 3.0 300 mg/kg 2.0 to 4.0 10.9 Manganese (Mn): 230 - mg/kg < 2.0 84.9 Mercury (Hg): < 1.0 17 mg/kg Molybdenum (Mo): < 1.0 75 mg/kg Nickel (Ni): 3.0 420 mg/kg Analyst: Assaf Sadeh Selenium (Se): < 1.0 36 mg/kg Zinc (Zn): 34 2800 mg/kg *Sample was received and handled in accordance with TMECC procedures. July 26, 2017 Account No.: Date Received 27 Jun. 17 7060976 - 2/3 - 7372 Sample i.d. Group: Sample I.d. No. 2/3 7060976 INTERPRETATION:Page one of three Is Your Compost Stable? Respiration Rate Biodegradation Rate of Your Pile 1.4 mg CO2-C/ g OM/day Biologically Available Carbon (BAC)Optimum Degradation Rate 1.5 mg CO2-C/ g OM/day Is Your Compost Mature? 0.017 Ratio Ammonia N ppm <10 mg/kg dry wt. Nitrate N ppm 300 mg/kg dry wt. pH value 7.60 units Cucumber Emergence 100.0 percent Is Your Compost Safe Regarding Health? Fecal Coliform < 1000 MPN/g dry wt. Salmonella Less than 3 /4g dry wt. Metals US EPA 503 Pass dry wt. Does Your Compost Provide Nutrients or Organic Matter? Nutrients (N+P2O5+K2O) 1.7 Percent dry wt. AgIndex (Nutrients / Sodium and Chloride Salts)((N+P2O5+K2O) / (Na + Cl)) 15 Ratio Plant Available Nitrogen (PAN)Estimated release for first season 2 lbs/ton wet wt. C/N Ratio 12 Ratio Soluble Available Nutrients & Salts (EC5 w/w dw) 1.3 mmhos/cm dry wt. Lime Content (CaCO3) 680 Lbs/ton dry wt. What are the physical properties of your compost? Percent Ash 74.7 Percent ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ dry wt. Sieve Size % > 6.3 MM (0.25") 1.2 Percent dry wt. < Stable >|<Moderately Unstable>|< Unstable >|< High For Mulch AmmoniaN/NitrateN ratio + BR-1NOP +++++ < Stable >|<Moderately Unstable>|< Unstable >|< High For Mulch +++++ VeryMature>|< Mature >|< Immature + VeryMature>|< Mature >|< Immature ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ < Immature >|< Mature ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ < Immature >|< Mature >|< Immature +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ < Immature >|< Mature +++++++ < Safe >|< High Fecal Coliform +++++++ <Safe (none detected) >|< High Salmonella Count(> 3 per 4 grams) +++++++++ <All Metals Pass >|< One or more Metals Fail +++++++++++++++++++++++ +++++++++++++ <Low >|< Average >|< High Nutrient Content +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Na & Cl >|< Nutrient and Sodium and Chloride Provider >|< Nutrient Provider < Low >|< Average >|< High Lime Content (as CaCO3) < High Organic Matter >|< Average >|< High Ash Content +++++++++ All Uses >|< Size May Restrict Uses for Potting mix and Golf Courses Low Nitrogen Provider>|< Average Nitrogen Provider >|<High Nitrogen Provider Jun17E No. 7 < Nitrogen Release >|< N-Neutral >|< N-Demand>|< High Nitrogen Demand ++++++ SloRelease>|< Average Nutrient Release Rate >|<High Available Nutrients ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ +++++++ Account No.: Date Received 7060976 - 2/3 - 7372 Sample i.d. Group: Sample I.d. No. 2/3 7060976 INTERPRETATION: Is Your Compost Stable?Page two of three Respiration Rate 1.4 Low: Good for all uses mg CO2-C/g OM/day The respiration rate is a measurement of the biodegradation rate of the organic matter in the sample (as received). The respiration rate is determined by measuring the rate at which CO2 is released under optimized moisture and temperature conditions. Biologically Available Carbon 1.5 Low: Good for all uses mg CO2-C/g OM/day Biologically Available Carbon (BAC) is a measurement of the rate at which CO2 is released under optimized moisture, temperature, porosity, nutrients, pH and microbial conditions. If both the RR and the BAC test values are close to the same value, the pile is optimized for composting. If both values are high the compost pile just needs more time. If both values are low the compost has stabilized and should be moved to curing. BAC test values that are higher than RR indicate that the compost pile has stalled. This could be due to anaerobic conditions, lack of available nitrogen due to excessive air converting ammonia to the unavailable nitrate form, lack of nitrogen or other nutrients due to poor choice of feedstock, pH value out of range, or microbes rendered non-active. Is Your Compost Mature? AmmoniaN:NitrateN ratio 0.017 very mature Composting to stabilize carbon can occur at such a rapid rate that sometimes phytotoxins remain in the compost and must be neutralized before using in high concentrations or in high-end uses. This Ammonia N ppm step is called curing. Typically ammonia is in excess with the break-down of organic materials resulting <10 NA in an increase in pH. This combination results in a loss of volatile ammonia (it smells). Once this toxic Nitrate N ppm ammonia has been reduced and the pH drops, the microbes convert the ammonia to nitrates. A low 300 mature ammonia + high nitrate score is indicative of a mature compost, however there are many exceptions. pH value For example, a compost with a low pH (<7) will retain ammonia, while a compost with high lime content 7.60 mature can lose ammonia before the organic fraction becomes stable. Composts must first be stable before curing indicators apply. Cucumber Bioassay 100.0 Percent Cucumbers are chosen for this test because they are salt tolerant and very sensitive to ammonia and organic acid toxicity. Therefore, we can germinate seeds in high concentrations of compost to measure phytotoxic effects without soluble salts being the limiting factor. Values above 80% for both percent emergence and vigor are indicative of a well-cured compost. Exceptions include very high salts that affect the cucumbers, excessive concentrations of nitrates and other nutrients that will be in range when formulated to make a growing media. Is Your Compost Safe Regarding Health? Fecal Coliform < 1000 / g dry wt. Fecal coliforms can survive in both aerobic and anaerobic conditions and is common in all initial compost piles. Most human pathogens occur from fecal matter and all fecal matter is loaded in fecal coliforms. Therefore fecal coliforms are used as an indicator to determine if the chosen method for pathogen reduction (heat for compost) has met the requirements of sufficient temperature, time and mixing. If the fecal coliforms are reduced to below 1000 per gram dry wt. it is assumed all others pathogens are eliminated. Potential problems are that fecal coliform can regrow during the curing phase or during shipping. This is because the conditions are now more favorable for growth than during the composting process. Salmonella Bacteria Less than 3 3 / 4g dry wt. Salmonella is not only another indicator organism but also a toxic microbe. It has been used in the case of biosolids industry to determine adequate pathogen reduction. Metals Pass The ten heavy metals listed in the EPA 503 regulations are chosen to determine if compost can be applied to ag land and handled without toxic effects. Most high concentrations of heavy metals are derived from woodwaste feedstock such as chrome-arsenic treated or lead painted demolition wood. Biosolids are rarely a problem. Does Your Compost Provide Nutrients or Organic Matter? Nutrients (N+P2O5+K2O) 1.7 low nutrient content This value is the sum of the primary nutrients Nitrogen, Phosphorus and Potassium. Reported units are consistent with those found on fertilizer formulations. A sum greater than 5 is indicative of a compost with high nutrient content, and best used to supply nutrients to a receiving soil. A sum below 2 indicates low nutrient content, and is best-used to improve soil structure via the addition of organic matter. Most compost falls between 2 and 5. BR-1NOP 27 Jun. 17 Jun17E No. 7 Account No.: Date Received 7060976 - 2/3 - 7372 Sample i.d. Group: Sample I.d. No. 2/3 7060976 INTERPRETATION:Page three of three AgIndex (Nutrients/Na+Cl) 15 High nutrient ratio Composts with low AgIndex values have high concentrations of sodium and/or chloride compared to nutrients. Repeated use of a compost with a low AgIndex (< 2) may result in sodium and/or chloride acting as the limiting factor compared to nutrients, governing application rates. These composts may be used on well-draining soils and/or with salt-tolerant plants. Additional nutrients form another source may be needed if the application rate is limited by sodium or chloride. If the AgIndex is above 10, nutrients optimal for plant growth will be available without concern of sodium and/or chloride toxicity. Composts with an AgIndex of above 10 are good for increasing nutrient levels for all soils. Most composts score between 2 and 10. Concentrations of nutrients, sodium, and chloride in the receiving soil should be considered when determining compost application rates. The AgIndex is a product of feedstock quality. Feedstock from dairy manure, marine waste, industrial wastes, and halophytic plants are likely to produce a finished compost with a low AgIndex. Plant Available Nitrogen (lbs/ton) 2 Low N Provider Plant Available Nitrogen (PAN) is calculated by estimating the release rate of Nitrogen from the organic fraction of the compost. This estimate is based on information gathered from the BAC test and measured ammonia and nitrate values. Despite the PAN value of the compost, additional sources of Nitrogen may be needed during he growing season to off- set the Nitrogen demand of the microbes present in the compost. With ample nutrients these microbes can further breakdown organic matter in the compost and release bound Nitrogen. Nitrogen demand based on a high C/N ratio is not considered in the PAN calculation because additional Nitrogen should always be supplemented to the receiving soil when composts with a high C/N ratio are applied. C/N Ratio 12 Indicates maturity As a guiding principal, a C/N ratio below 14 indicates maturity and above 14 indicates immaturity, however, there are many exceptions. Large woodchips (>6.3mm), bark, and redwood are slow to breakdown and therefore can result in a relatively stable product while the C/N ratio value is high. Additionally, some composts with chicken manure and/or green grass feedstocks can start with a C/N ratio below 15 and are very unstable. A C/N ratio below 10 supplies Nitrogen, while a ratio above 20 can deplete Nitrogen from the soil. The rate at which Nitrogen will be released or used by the microbes is indicated by the respiration rate (BAC). If the respiration rate is too high the transfer of Nitrogen will not be controlable. Soluble Nutrients & Salts (EC5 w/w dw - mmhos/cm) 1.3 Average salts This value refers to all soluble ions including nutrients, sodium, chloride and some soluble organic compounds. The concentration of salts will change due to the release of salts from the organic matter as it degrades, volatilization of ammonia, decomposition of soluble organics, and conversion of molecular structure. High salts + high AgIndex is indicative of a compost high in readily available nutrients. The application rate of these composts should be limited by the optimum nutrient value based on soil analysis of the receiving soil. High Salts + low AgIndex is indicative of a compost low in nutrients with high concentrations of sodium and/or chloride. Limit the application rate according to the toxicity level of thesodium and/or chloride. Low salts indicates that the compost can be applied without risking salt toxicity, is likely a good source of organic matter, and that nutrients will release slowly over time. Lime Content (lbs. per ton) 680 High lime content Compost high in lime or carbonates are often those produced from chicken manure (layers) ash materials, and lime products. These are excellent products to use on a receiving soil where lime has been recommended by soil analysis to raise the pH. Composts with a high lime content should be closely considered for pH requirements when formulating potting mixes. Physical Properties Percent Ash 74.7 High ash content Ash is the non-organic fraction of a compost. Most composts contain approximately 50% ash (dry weight basis). Compost can be high in ash content for many reasons including: excess minerilzation(old compost), contamination with soil base material during turning, poor quality feedstock, and soil or mineral products added. Finding the source and reducing high ash content is often the fastest means to increasing nutrient quality of a compost. Particle Size % > 6.3 MM (0.25") 1.2 May restrict use Large particles may restrict use for potting soils, golf course topdressings, seed-starter mixes, and where a fine size distribution is required. Composts with large particles can still be used as excellent additions to field soils, shrub mixes and mulches. Particle Size Distribution Each size fraction is measured by weight, volume and bulk density. These results are particularly relevent with decisions to screen or not, and if screening, which size screen to use. The bulk density indicates if the fraction screened is made of light weight organic material or heavy mineral material. Removing large mineral material can greatly improve compost quality by increasing nutrient and organic concentrations. Appendix: Estimated available nutrients for use when calculating application rates Plant Available Nitrogen (PAN) calculations: lbs/ton (As Rcvd.) PAN = (X * (organic N)) + ((NH4-N) + (NO3-N)) X value = If BAC < 2 then X = 0.1 Plant Available Nitrogen (PAN) 1.8 If BAC =2.1 to 5 then X = 0.2 Ammonia (NH4-N) 0.01 If BAC =5.1 to 10 then X = 0.3 Nitrate (NO3-N) 0.36 If BAC > 10 then X = 0.4 Available Phosphorus (P2O5*0.64) 2.5 Note: If C/N ratio > 15 additional N should be applied. Available Potassium (K2O) 1.7 27 Jun. 17 BR-1NOP Jun17E No. 7 TEL: 831-724-5422 FAX: 831-724-3188 www.compostlab.com Account #: 7060976-2/3-7372 Group: Jun17E #7 Reporting Date: Brooks Contractor 1195 Beal Rd. Attn: Amy Brooks Date Received: 27 Jun. 17 Sample Identification: BR-1NOP Sample ID #: 7060976 - 2/3 Metals Results Units MDL % Recovery Date Tested Arsenic (As): 1.5 mg/kg dw 1.0 95.9 05 Jul. 17 Cadmium (Cd): Less than 1.0 mg/kg dw 1.0 94.0 05 Jul. 17 Chromium (Cr): 5.1 mg/kg dw 1.0 95.6 05 Jul. 17 Copper (Cu): 8.9 mg/kg dw 1.0 89.9 05 Jul. 17 Lead (Pb): 3.0 mg/kg dw 1.0 91.9 05 Jul. 17 Mercury (Hg): Less than 1.0 mg/kg dw 1.0 100.8 05 Jul. 17 Molybdenum (Mo): Less than 1.0 mg/kg dw 1.0 86.2 05 Jul. 17 Nickel (Ni): 3.0 mg/kg dw 1.0 97.2 05 Jul. 17 Selenium (Se): Less than 1.0 mg/kg dw 1.0 88.5 05 Jul. 17 Zinc (Zn): 34 mg/kg dw 1.0 99.5 05 Jul. 17 Cobalt (Co) 1.7 mg/kg dw 0.50 98.0 05 Jul. 17 Total Solids (TMECC 03.09) 61 % 0.05 NA 30 Jun. 17 Bacteria Results Units MDL Date Tested Fecal Coliform 85 MPN/g dw 27 Jun. 17 Salmonella Less than 3 MPN/4g dw 3 27 Jun. 17 Pollutant Loading Rate: Multiply mg/kg dry weight values times 0.0614 to give you kilograms pollutant per 100 metric ton compost as-received based on a moisture content of 38.6 percent. 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