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•Check

•Parameters

•Rules

•Errors

 

Check for Relative Percent Difference (RPD) values for field and lab results that fall outside Quality Control (QC) limits. It is important that RT_MATRIX.MEDIUM_CODE be populated for this check to work properly. (Note that DT_RESULT_QC is NOT used for this check.)

 

Check

 

Check name is EarthSoft.DQM.RPD_Lab_Field = "Lab versus Field RPD".

 

Parameters

 

This check uses three Global Parameters:

1.reportable_result – DT_RESULT.REPORTABLE_RESULT values to include in DQM datasets

2.result_type_code – DT_RESULT.RESULT_TYPE_CODE to include in DQM datasets

3.test_type_batch – AT_TEST_BATCH_ASSIGN.TEST_BATCH_TYPE to include in DQM dataset

 

Six parameters are available for this check. None of these parameters allow for input of method-specific PARAM_VALUEs. However, the lab_field_cas_rns parameter requires the input of CAS_RNs for which an RPD will be determined.

1.lab_field_cas_rns – Populate CAS_RN with the Lab result DT_RESULT.CAS_RN; populate PARAM_VALUE with the Field result DT_RESULT.CAS_RN.

2.medium_code_soil – RT_MATRIX.MEDIUM_CODE for DT_SAMPLE.MATRIX_CODE for soil samples. Defaults to “Soil”.

3.medium_code_water – RT_MATRIX.MEDIUM_CODE for DT_SAMPLE.MATRIX_CODE for water samples. Defaults to “Water”.

4.rpd_control_limit_other – RPD control limit for other samples. Defaults to 25.

5.rpd_control_limit_soil – RPD control limit for soil samples. Defaults to 35.

6.rpd_control_limit_water – RPD control limit for water samples. Defaults to 20.

 

 

Rules

 

There is one (1) rule, "LAB FIELD RPD". The first steps are:

a) Find the lab results with DT_RESULT.CAS_RN = lab_field_cas_rns.CAS_RN and then:

b) Find the matching field results with DT_RESULT.CAS_RN = lab_field_cas_rns.PARAM_VALUE.

c) Process both results by calculating the RPD.
RPD = 100 * ABS_VAL(resultField - resultLab) / (0.5 * ABS_VAL(resultField + resultLab)).

oIf the MEDIUM_CODE of DT_SAMPLE.MATRIX_CODE = medium_code_soil, then:

▪qualify the results if RPD> rpd_control_limit_soil.

oIf the MEDIUM_CODE of DT_SAMPLE.MATRIX_CODE = medium_code_water, then:

▪qualify the results if RPD> rpd_control_limit_water.

oOtherwise, if MEDIUM_CODE of DT_SAMPLE.MATRIX_CODE is different or NULL, then:

▪qualify the results if RPD> rpd_control_limit_other.

 

 

Errors

 

In the Errors tab of the DQM Event Review Form, this error may be listed:

 

•"One of the required rules for this check is not present in the RT_DQM_RULE table."
If you receive this error, the QAPP can be updated following the How to Update Existing QAPPs documentation page.