A GUIDE TO FUEL PERFORMANCE - Virginia Clean Cities

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Use your observations (color, odor, clarity) in addition to the microbial tests to help you toidentify microbial problems.Check for microbial mats or slime.A blend of brown to red, or black material in the fuel or water layer indicates thepresence of microbes.Hydrogen sulfide has a rancid odor and indicates heavy microbial contamination.Figure 6-12Obtaining 5cc of bottom sample for microbial field test (left);injecting sample into aqueous broth for detecting bacterial and fungal growth (right).Figure 6-1 3 Example of fuel oil sample in a test vial at the start of the test.A GUIDE TO FUEL PERFORMANCE 43
.Figure 6-14 Examples of fuel oils after an incubation period of 30-hours (Liqui-Cult, MCE).Color change in the broth medium (bottom layer) from clear to pink indicates bacterialgrowth.S S dr-No Microbes Moderate Growth Heavy: Low levels of microbial growth won't affect your fuel delivery systembe a problem site if materials can be drawn intorowth: If you are getting repeated no-heat calls, burner shutdowns due to filterand line clogging, then its time for mechanical cleaning and/or chemical treatment, or as alast resort tank replacement.Prevention and ControlMicrobial control requires a strategy with consideration for tank system design, appropriate .sampling and analysis protocols, monitoring, and remedial treatment.The approach to prevention of corrosion in storage tanks is the following:Good tank system design and operation to minimize water entry. Proper installation andtank location, having adequate inspection port for sampling, water removal, and cleaningwhen necessary.Remedial treatment includes fuel filtration, biocide treatment when needed, tank cleaningand disposal of contaminated fuel.Tank materials selection includes non-metallic materials to avoid corrosi,on, or coatings toisolate the steel surface from water. Cathodic protection (CP) can prevent corrosion, includingmicrobially induced corrosion. It should be noted that CP is generally applied to externalsurfaces; protecting inside surfaces requires CP to be applied inside of tanks.References:1. ASTM D 6469 Standard Guide for Microbial Contamination in Fuels and Fuel Systems2. ASM (The Materials Information Society) Handbook, Volume 1 I, Thomas R. Jack, BiologicalCorrosion Failures44 THE NORA FUEL QUALITY MANUAL
Page 1 and 2: BNL-73601-2005-IRA GUIDE TO FUEL PE
Page 3 and 4: A GUIDE TO FUEL PERFORMANCETABLE OF
Page 5 and 6: 2. Overview of Heating OilWhen crud
Page 7 and 8: 3. Purchasing FuelsSpecificationsTh
Page 9 and 10: 4. Understanding Fuel PropertiesGoo
Page 11 and 12: 4) carbon residue is the amount of
Page 13 and 14: Cold Flow Properties of Heating Oil
Page 15 and 16: Table 4-2 10th Percentile Minimum T
Page 17 and 18: The following charts provide an exa
Page 19 and 20: MixingAdditives will not fix the pr
Page 21 and 22: 5. Common Fuel Problems.Fuel Cleanl
Page 23 and 24: During this test period small amoun
Page 25 and 26: Recommendations for clearing clogge
Page 27 and 28: verify the amount of fuel to be del
Page 29 and 30: 60 How to Diagnose Fuel ProblemsMon
Page 31 and 32: Figure 6-1 Bar Chart for Clear and
Page 33 and 34: How can you do a visual inspection
Page 35 and 36: How to Sample Incoming Fuels from B
Page 37 and 38: How to Sample Bulk Storage TanksFor
Page 39 and 40: Bottom Samde for Water and Sediment
Page 41: Test i n g for M i cro b i a I Co n
Page 45 and 46: Does th le sample taken from the bo
Page 47 and 48: What does a tank bottom sample tell
Page 49 and 50: 8. How to Prevent Fuel ProblemsA pr
Page 51 and 52: 9. About Fuel Oil AdditivesFuel oil
Page 53 and 54: How to Select an AdditiveThe follow
Page 55 and 56: on the container's label as REG. NO
Page 57 and 58: AppendicesA. Commercial Testing Law
Page 59 and 60: PennsylvaniaAnter Laboratories, Inc
Page 61: Instruments: Petroleum Testing (con

A GUIDE TO FUEL PERFORMANCE - Virginia Clean Cities

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