%52g£ / UNITED STATES ENVIRONMENTAL PROTECTION AGENCY
REGION 7 901 NORTH 5TH STREET KANSAS CITY, KANSAS 66101
JUL 2 5 2012
SUBJECT: Quality Assurance Project Plan for Surface Gamma Scans and Down-hole Gamma Scans West Lake Landfill OUl – Reviewed
FROM: Diane Harris^ WU&Kv^
Regional Quality Assurance Manager
EPA Project Manager SupSSS^^ SUPR/MOKS 0 UO |
The review of the subject document prepared by EPA Superfund MOKS branch, dated July 2012, has
been completed according to “EPA Requirements for Quality Assurance Project Plans for
Environmental Data Operations, ” EPA QA/R-5 March 2001.
Because the document was unsigned, it was reviewed as a draft and the comments are outlined below.
Critical comments identify issues which need to be addressed before the document can be approved.
Signature Page. When the document is ready for final approval, it will need to be submitted with the appropriate signatures.
§B1 Sampling Process Design, pages 6-7.
a.. The last sentence of page 6 states “the detector will be lowered to the bottom of each accessible well or to a maximum depth of 150 feet, whichever is greater.” If the bottom of the accessible monitoring well is less than 150 ft, how will the detector be lowered to 150 ft? See also §A6.1.
b^/How will it be determined the reading on the detector is stable?
2>y §B8 Instrument Calibration and Frequency, page 8. How will it be determined when calibrations are needed on-site?
Ay Figure 1 is a general map of the site layout. It does not include the locations of any monitoring wells. The map should include the locations of monitoring wells that are anticipated to be sampled.
, v, RECYCLED ^… vb0DuD%FIBER
1 ./§A3 Distribution List, page 3. Will the QAPP be distributed to the OSC performing the “work? 2/’§Bl 1 Data Management, page 8. How long will the data be stored? 3y Attachment A could not be located. If you have any questions, please contact the lead reviewer, Jenn Boggess at x7185, or me at x7258. R7QAO Document Number: 2012240 ‘