Analyze Immediately Temperature
Hold Times • IMMEDIATELY! • Between 0 -15 minutes, as close to sample collection time as possible - note both time of collection AND time of analysis!
Important Specifics • Other parameters are temperature-dependent • EPA Method 170.1 • SM 2550B • Follow NJAC 7:18-3.3(a)5. • Thermometric (“grab”) • Continuous
New Jersey Regulations • Graduated in 0.5 degree Celsius increments • Bears repeating: CELSIUS, not Fahrenheit!!! • For Fecal Coliform, at least 0.2 degree C increments
More Specifics • Continuous monitors: 0.5 degree C increments • Must verify & calibrate!(more on that next….)
Before we go any further... Important Definition! “NIST” = National Institute of Standards & Technology
Per NJAC Regulations: • Must be calibrated against a NIST thermometer. • Graduated in 0.2 degree C increments. • The NIST must cover the range of all analyses for which the lab is certified. • NIST must have a certificate with an ID number that matches the ID number on the NIST thermometer……..
But, do you know your options?? • You perform calibration with your very own NIST thermometer; • You ship out your thermometers & have a facility with a NIST perform the calibration & verification.
Option 1: Do It Yourself…. • Advantages: Your very own NIST thermometer in-house. • No need to ship out. • No need to worry about paperwork from the other facility - you keep all the records. • May be a cost savings.
Option 2: sending out your thermometers • Advantages: No need to buy expensive NIST thermometer(s). • Good if you have 1 or 2 thermometers. • Disadvantages: Must keep associated certification forms. • Breakage or lost in transit.
More Requirements • Keep extensive records: serial #, correction factors, dates, initials, ID #s. • must calibrate over the range of all thermometers in use at the facility. • Glass: calibrate yearly. • Metal: calibrate quarterly (includes thermocouples or infra-red devices).
Records • NJAC 7:18-8.5 - This section pertains specifically to Analyze-Immediately parameters… • GENERAL: retain raw data records, quality control data records, chain-of-custody forms, laboratory reports… • Storage of data - data must be filed & maintained in an accessible location on lab premises for 1 year after analysis date… • Long-term storage: records of analysis must be stored for 5 years after analysis date.
Retain as Records of Analysis • Assigned lab ID # or other form of ID • date & time of analysis • name & signature of person(s) who collected sample • name & signature of person(s) who analyzed sample • type of analysis performed & DSAM* used (*DSAM=Dept. Sanctioned Analytical Method) • results of analysis & raw data generated from analysis
Reporting Results • Certified environmental lab name & NJ lab ID number • date, time & location of sample collection and sample analysis • type of analysis performed and analytical method employed • results from analysis • name & signature of environmental lab manager or designee per NJ regulations (NJAC 7:18-2.11(a)1iii)
In Closing….. • Temperature is a simple test but,…. • Calibration / verification a must…. • Correction factors… • Document, document, document!!! • Temperature readings affect other analyses & instruments.