Standard Operating Procedures l At l Call for help at Orlando Office Tallahassee

Chapters of Interest l FS2400 Wastewater Sampling l FT1000 Field Testing General l FT1100 Field pH l FT1400 Temperature l FT1500 Field Dissolved Oxygen l FT1600 Field Turbidity l FT1900 Continuous Monitoring l FT2000 Field Chlorine (TRC)

Calibration Field pH FT1100 l Quarterly And the good news, THERE ARE NO QUARTERLY CALIBRATION REQUIREMENTS FOR pH l Monthly and for more good news, THERE ARE NO MONTHLY CALIBRATION REQUIREMENTS FOR pH

Calibration of pH meter l Weekly - Cannot be done with all meters, calibrate and check meter’s % slope. l Should be 90% or greater l Record date, time, analyst, ph buffer readings after calibration, buffer lot #, buffer expiration date, temperature, and slope

Daily Calibration l Calibrate with at least 2 buffers l Use 7 buffer first then 4 or 10 l Second buffer will bracken most samples l For meters using 2 point calibration, use third buffer as check

Field Calibration l In the field, as minimum, check meter with 7 buffer. l Record readings l Return from the field as minimum, check meter with 7 buffer l No more than 0.2 pH units off from standard

Continuous pH meter calibration l Perform an initial calibration before installation whenever taken off-line after failed QC check l 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 l If its not written down you did not do it! l Date and time l Analyst l Reading from continuous meter l Reading from calibrated meter l No more than 0.2 pH units different than calibrated meter reading

Temperature FT1400 l Variety of thermometers for field capable of reading 0.1 degree Celsius l Laboratory thermometer NIST-traceable reading 0.1 degree Celsius

Temperature Calibration Temperature should agree within 0.1 degree Celsius Keep records of checks and sample measurements

Turbidity FT1600 l Meter specifications are in EPA Method or FT1600 l Daily Checks l Quarterly Checks

Quarterly Calibration l Used to validate the secondary standards l Use properly calibrated nephelometer l Use primary standard for each range of secondary standard l Refer to FT for acceptable limits for secondary standards l This calibrates the secondary standards

Daily Calibration l Used for assurance meter is operating properly l Check each range with primary or secondary standard l Refer to FT for acceptable limits for secondary standards

Record Keeping l Type of standards and concentrations l Date, Time, Analyst l result of each check l Lot # and expiration date for all bought standards l Lot # and expiration date for l all bought reagents

IN-line Turbidity Calibration l Initial calibration Before installation when taken off-line when fails QC criteria l Daily Check grab sample, measure with calibrated meter and compare

In-line Turbidity l 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 l DEP recommends using DPD colorimetric method for concentrations between 0.2 and 4.0 mg/L l DEP does not recommend equipment l Can’t use gel stds for <0.5 requirements l Color wheel comparison kits are unacceptable

Quarterly Calibration l Used to calibrate/check the meter l Meter is checked with primary standards l At least one standard for each range l Refer to FT2011 for acceptable limits for primary standards l Can be performed by a laboratory certified in residual chlorine or Class A or B operator

Quarterly Paperwork l If you took the time to do it, be able to prove it!!! l Date, time, analyst l Lot # and expiration date of chemicals used l True value of standard and meter reading

Monthly Calibration l Used to validate the secondary standards l Use properly calibrated meter l Use primary standard for each range of secondary standard l Refer to FT2011 for acceptable limits for secondary standards l This validates the secondary standards l Can be performed by a laboratory certified in residual chlorine or Class A or B operator

Monthly paperwork l when you write it down you make me so happy!!! l Date, time, analyst l Lot # and expiration date of standards used l True value of standard and meter reading

Daily Calibration l Commercial secondary standards or primary standards l Zero with blank l Read the other three standards l Date, time, analyst l Lot # and expiration date of standards used l True value of standard and meter reading

In-Line Calibration l Calibrate initially when taken off-line when QC checks failed l Check against calibrated meter daily should be no more than 20 % difference