| Nitrate Data | |||||
|---|---|---|---|---|---|
| LEVEL 1 | LEVEL 2 | LEVEL 3 | LEVEL 4 | LEVEL 5 | |
| Well location | ¼ section at minimum | ¼ section at minimum | ¼ section at minimum | ¼ section at minimum | ¼ section at minimum |
| Well characteristics | use, depth | use, depth | use, depth | use, depth, screened interval | monitoring well, depth, screened interval |
| Sampling procedure & sample preservation | meets standard well purging guidelines and collection, handling, and preservation procedures given in method | meets standard well purging guidelines and collection, handling, and preservation procedures given in method | meets standard well purging guidelines and collection, handling, and preservation procedures given in method | meets standard well purging guidelines and collection, handling, and preservation procedures given in method | meets standard well purging guidelines and collection, handling, and preservation procedures given in method |
| Analytical method | not an EPA- accepted method | an EPA- accepted method | an EPA- accepted method | an EPA- accepted method | best available method specific for analyte |
| Field QC | none | none | field duplicates (FD) | FD, equipment blanks | FD, equipment blanks |
| Laboratory QC | cross-checks using an EPA- accepted method; participation in performance evaluation studies | less than level 3 | laboratory duplicates, reagent blanks, fortified blanks, quality control samples | laboratory duplicates, reagent blanks, fortified blanks, quality control samples, lab fortified matrix samples | laboratory duplicates, reagent blanks, fortified blanks, quality control samples, lab fortified matrix samples |
| Pesticide Data | |||||
|---|---|---|---|---|---|
| LEVEL 1 | LEVEL 2 | LEVEL 3 | LEVEL 4 | LEVEL 5 | |
| Well location | ¼ section at minimum | ¼ section at minimum | ¼ section at minimum | ¼ section at minimum | ¼ section at minimum |
| Well characteristics | use, depth | use, depth | use, depth | use, depth, screened interval | monitoring well, depth, screened interval |
| Sampling procedure & sample preservation | meets standard well purging guidelines and collection, handling, and preservation procedures given in method | meets standard well purging guidelines and collection, handling, and preservation procedures given in method | meets standard well purging guidelines and collection, handling, and preservation procedures given in method | meets standard well purging guidelines and collection, handling, and preservation procedures given in method | meets standard well purging guidelines and collection, handling, and preservation procedures given in method |
| Analytical method | not an EPA-accepted qualitative and quantitative method | an EPA- accepted method | an EPA- accepted method | a GC/MS EPA-accepted method | best available method specific for analyte |
| Field QC | none | none | field duplicates (FD) | FD, equipment blanks | FD, equipment blanks |
| Laboratory QC | cross-checks using an EPA- accepted method; participation in performance evaluation studies | less than level 3 | laboratory duplicates and the minimum QC specified in method | laboratory duplicates and the minimum QC specified in method | laboratory duplicates and the minimum QC specified in method |
Here is an RTF version of the Quality Assessment Levels that can be imported into a word processor or spreadsheet program.