Response to EPA Comments: RCRA Facility Investigation Phase I ...

Table II - Overall Evaluation of Data - Data Validation Memorandum
Semivolatil e Organic s
DQO Samplin g and/or Measuremen t Error Samplin g
(List all Analytical Method Analytica l Erro r Samplin g Error* Variability**
DQOs) Appropriate
Yes or No
Determine level of Analytical Method: Refer to qualifications in Refer to Qualifications in
soil contamination in SW-846 ­ EPA Method 8270 Table 1: Table 1:
order lo decide Yes J
whether or not to
dispose of soil SW-846-EPAMethod8080 R, J
off-site. Yes
SW-&46-EPA Method 8150 J
Yes
* The evaluation of "sampling error" cannot be completely assessed in data validation.
** Sampling Variability is not assessed in data validation.
Validator: M A
Date:
EPA-NE - Data Validation Worksheet
Page 12
Potential Usability
Issues
'^ Estimate non detect result
for n-nitrosodimethylamine
due to neg. bias of %D
exceedance.
^ Estimate detection limits for
DDD and Dieldrin due to
neg. bias of %D
exceedance.
> Endrin result of non-detect
is unusable due to negative
bias caused by elevated
%breakdoviffi. Detection limit
unusable due to possibility
of false negatives.
V Estimate non-detect results
limits for MCPA,
Dichloroprop, 2,4-D, and
2,4-DB due to neg. bias of
%D exceedance.
^l^ln