Pesticide analysis fragment, Oct 2001

NYC 9/11 Public Portal Document

Method 508 QC Checklist Batch /

1. Calibration: IC ) %RSD within 20% F Unext. LCS within 20% of T V 3 levels CC alternating 2 stds, each within 20% of T. V. P One at beginning of sequence, and one at end

2. Extraction within 14 days of collection: N Injection within 30 days of extraction: ( Y/ N

3. LPC standard: S/N F PGF F Res

4. Endrin and DDT breakdown: Within 20% prior to calibration or verification: N

5. Surrogate recoveries: List samples that failed and were reextracted.

6. Method blank: F

7. Field blank: k Not needed ) P F / 8. LCS per batch: Failures present Yes ( No

9. Matrix spike every 10 samples: Failures present Yes No or per batch Yes No \ 10. Duplicate matrix spike: Failures present with each matrix spike 11. Quarterly Check sample within 30% of limits: \Not needed Failures :sent Yes No''

12. Duplicate samples: List positive samples which were reanalyzed:

13. Problems were encountered: Yesf No y What type:

Batch sheet Injection Log Manual

Analyst Supv. Decision_ Approved__ H J3. _1 Rev. 11/8/01

NYC-WTC_000081367