Acceptable. Laboratory’s MRL Laboratory’s determination SM 2540 N/A for TSS is set at of the MRL must meet D-2011; 2mg/L. method requirement to Section process sufficient sample 3b volume (up to 1L) to yield a minimum residue of 2.5 mg. If the laboratory continues using a sample volume of 500 mL, the laboratory’s MRL must be raised to 5 mg/L. MRL has been listed on list by KY DOW as 5mg/L. Oil and grease SOP Verify calibration of the EPA 1664 Unacceptable. Added verbage does not include balance (per Section 10 of Rev. A Sections 9.1 to indicate balance the method) before and Section and 9.2 do that 9.5 calibration after each analytical address calibration verification after batch. If calibration is verification shall be each analytical not verified after of balance perfomed on batch. measurement of the calibration balance before analytical batch, but do not and after each recalibrate the balance specify that analytical and reweigh the batch. this must be batch. done before and after each analytical batch.
Laboratory’s MRL for TSS is set at 2mg/L. Laboratory’s determination of the MRL must meet method requirement to process sufficient sample volume (up to 1L) to yield a minimum residue of 2.5 mg. If the laboratory continues using a sample volume of 500 mL, the laboratory’s MRL must be raised to 5 mg/L. MRL has been listed on list by KY DOW as 5mg/L. SM 2540 D-2011; Section 3b Acceptable. N/A Oil and grease SOP does not include balance calibration verification after each analytical batch. Verify calibration of the balance (per Section 10 of the method) before and after each analytical batch. If calibration is not verified after measurement of the analytical batch, recalibrate the balance and reweigh the batch. EPA 1664 Rev. A Section 9.5 Unacceptable. Sections 9.1 and 9.2 do address verification of balance calibration but do not specify that this must be done before and after each analytical batch. Added verbage to indicate that calibration shall be perfomed on balance before and after each analytical batch.