NYC 9/11 Public Portal Document
Method 508 PC Checklist Batch 1549//v/9 / )
1. Calibration: ( IC %RSD within 20% F Unext. LCS within 20% of T.V. (P/F
3 levels
CCV alternating 2 stds, each within 20% of T.V. ( P-) F
One at beginning of sequence, and one at end S—y
2. Extraction withinl4 days of collection: N Injection within 30 days of extraction! YN
3. LPC standard: S/N F PGF /PF Res / P / F
4. Endrin and DDT breakdown: Within 20% prior to calibration or verification:
5. Surrogate recoveries: List samples that failed and were reextracted.
—0
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 ) 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
/
Approved V \
Analyst. - Supv. Decision
Rev. 11/8/01
lb)
NYC-WTC_000006705
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