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Standard Operating Procedures. At www.dep.state.fl.us/labs/qa/sops.htm Call for help at 407-893-3313 Orlando Office 850-488-2796 Tallahassee. Chapters of Interest. FS2400 Wastewater Sampling FT1000 Field Testing General FT1100 Field pH FT1400 Temperature FT1500 Field Dissolved Oxygen

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standard operating procedures
Standard Operating Procedures
  • At www.dep.state.fl.us/labs/qa/sops.htm
  • Call for help at
    • 407-893-3313 Orlando Office
    • 850-488-2796 Tallahassee
chapters of interest
Chapters of Interest
  • FS2400 Wastewater Sampling
  • FT1000 Field Testing General
  • FT1100 Field pH
  • FT1400 Temperature
  • FT1500 Field Dissolved Oxygen
  • FT1600 Field Turbidity
  • FT1900 Continuous Monitoring
  • FT2000 Field Chlorine (TRC)
calibration field ph ft1100
Calibration Field pHFT1100
  • Quarterly
    • And the good news, THERE ARE NO QUARTERLY CALIBRATION REQUIREMENTS FOR pH
  • Monthly
    • and for more good news, THERE ARE NO MONTHLY CALIBRATION REQUIREMENTS FOR pH
calibration of ph meter
Calibration of pH meter
  • Weekly - Cannot be done with all meters, calibrate and check meter’s % slope.
  • Should be 90% or greater
  • Record date, time , analyst, ph buffer readings after calibration, buffer lot # , buffer expiration date, temperature, and slope
daily calibration
Daily Calibration
  • Calibrate with at least 2 buffers
  • Use 7 buffer first then 4 or 10
  • Second buffer will bracken most samples
  • For meters using 2 point calibration, use third buffer as check
field calibration
Field Calibration
  • In the field, as minimum, check meter with 7 buffer.
  • Record readings
  • Return from the field as minimum, check meter with 7 buffer
  • No more than 0.2 pH units off from standard
continuous ph meter calibration
Continuous pH meter calibration
  • Perform an initial calibration
    • before installation
    • whenever taken off-line
    • after failed QC check
  • Daily checks
    • compare pH of grab sample taken at same location as in-line monitor
    • grab sample pH measured with calibrated meter
document document document
Document, Document, Document
  • If its not written down you did not do it!
  • Date and time
  • Analyst
  • Reading from continuous meter
  • Reading from calibrated meter
  • No more than 0.2 pH units different than calibrated meter reading
temperature ft1400
TemperatureFT1400
  • Variety of thermometers for field
    • capable of reading 0.1 degree Celsius
  • Laboratory thermometer
    • NIST-traceable reading 0.1
    • degree Celsius
temperature calibration
Temperature Calibration
  • Temperature should agree within 0.1 degree Celsius
  • Keep records of checks and sample measurements
turbidity ft1600
TurbidityFT1600
  • Meter specifications are in EPA Method 180.1 or FT1600
  • Daily Checks
  • Quarterly Checks
quarterly calibration
Quarterly Calibration
  • Used to validate the secondary standards
  • Use properly calibrated nephelometer
  • Use primary standard for each range of secondary standard
  • Refer to FT1600 3.2 for acceptable limits for secondary standards
  • This calibrates the secondary standards
daily calibration13
Daily Calibration
  • Used for assurance meter is operating properly
  • Check each range with primary or secondary standard
  • Refer to FT1600 3.2 for acceptable limits for secondary standards
record keeping
Record Keeping
  • Type of standards and concentrations
  • Date, Time, Analyst
  • result of each check
  • Lot # and expiration date for all bought standards
  • Lot # and expiration date for
  • all bought reagents
in line turbidity calibration
IN-line Turbidity Calibration
  • Initial calibration
    • Before installation
    • when taken off-line
    • when fails QC criteria
  • Daily Check
    • grab sample, measure with calibrated meter and compare
in line turbidity
In-line Turbidity
  • write it down!!
    • date, time, analyst
    • reading from in-line meter and other meter
    • should be no more than 20 % difference
    • use caution with very low readings
total residual chlorine ft2000
Total Residual ChlorineFT2000
  • DEP recommends using DPD colorimetric method for concentrations between 0.2 and 4.0 mg/L
  • DEP does not recommend equipment
  • Can’t use gel stds for <0.5 requirements
  • Color wheel comparison kits are unacceptable
quarterly calibration18
Quarterly Calibration
  • Used to calibrate/check the meter
  • Meter is checked with primary standards
  • At least one standard for each range
  • Refer to FT2011 for acceptable limits for primary standards
  • Can be performed by a laboratory certified in residual chlorine or Class A or B operator
quarterly paperwork
Quarterly Paperwork
  • If you took the time to do it, be able to prove it!!!
  • Date, time, analyst
  • Lot # and expiration date of chemicals used
  • True value of standard and meter reading
monthly calibration
Monthly Calibration
  • Used to validate the secondary standards
  • Use properly calibrated meter
  • Use primary standard for each range of secondary standard
  • Refer to FT2011 for acceptable limits for secondary standards
  • This validates the secondary standards
  • Can be performed by a laboratory certified in residual chlorine or Class A or B operator
monthly paperwork
Monthly paperwork
  • when you write it down you make me so happy!!!
  • Date, time, analyst
  • Lot # and expiration date of standards used
  • True value of standard and meter reading
daily calibration22
Daily Calibration
  • Commercial secondary standards or primary standards
  • Zero with blank
  • Read the other three standards
  • Date, time, analyst
  • Lot # and expiration date of standards used
  • True value of standard and meter reading
in line calibration
In-Line Calibration
  • Calibrate
    • initially
    • when taken off-line
    • when QC checks failed
  • Check against calibrated meter daily
    • should be no more than 20 % difference