NYC 9/11 Public Portal Document
Method 508 QC Checklist Batch 15415 H )c^l1° ‘
1. Calibration: (IC) %RSD within 20% F Unext. LCS within 20% of T.V. F
3 levels .
CCV) alternating 2 stds, each within 20% of T. V. P Cphelus " 4)
—• One at beginning of sequence, and one at end
2. Extraction within 14 days of collection: () N Injection within 30 days of extraction: N
3. LPC standard: S/N (P F PGF F Res F
4. Endrin and DDT breakdown: Within 20% prior to calibration or verification: N
5. Surrogate recoveries: List samples that failed and were reextracted.
2874 37 M *r
(J '
6. Method blank: F
7. Field blank: / 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
10. Duplicate matrix spike: Failures present Yes No
with each matrix spike
11. Quarterly Check sample within 30% of limits/ Not needed 1 Failures present Yes No
12. Duplicate samples: List positive samples which were reanalyzed:
13. Problems were encountered: Yes ( No What type:
Batch sheet Injection Log Manual
Analyst < Supv. Decision Approved
Rev. 11/8/01
NYC-WTC_000006411
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