DISTRICT LABORATORY ACCREDITATION PROGRAM

 

The Central Materials Laboratory (CML) will accredit the District Materials Laboratories and maintain records of the accreditation for five years. The CML Staff will check the following prior to accrediting a laboratory:

 

1.   Check for current manuals and test procedures covering the accredited testing.

2.   Check the certification and training records of the testing personnel.

3.   Document that proper equipment is available to perform qualified testing.

4.   Check documentation system.

 

Scheduling of the annual accreditation review will be discussed with the laboratories needing accreditation.

 

Table 1 is the list of items to be reviewed.

 

NON-COMPLIANCE/DISPUTE RESOLUTION

A laboratory that does not meet the requirements of the IM is subject to elimination from the qualification program.

 

The CML and the District Materials Engineer will resolve disputes concerning calibration and correlation of equipment.

 

TABLE 1 - Laboratory Accreditation Checklist

 

 

Minimum Calib./Verif. Interval

Calib./Verif. Procedure

Tester Qualifications-Proper Iowa DOT certifications

 

 

 

Current Test Procedures

 

 

 

Current Calibration Procedures & Records

 

 

 

Documentation of correlation results and corrective actions taken for previous construction season

 

 

 

 

 

 

 

Balances

 

  12 months

Iowa 917

Ovens

 

  12 months

Iowa 1501

Mechanical Shakers

 

  12 months

Iowa 1502

Gyratory Compactor T-312

 

    6 months

Iowa 1522

Comp. Test Machine T-245

 

  12 months

Iowa 1505

Sieves

 

    6 months

Iowa 1506

Thermometers - Test

 

    6 months

Iowa 1607

Thermometers - Ref.

 

  12 months

Iowa 1607

Timers T-201, T-202

 

    6 months

Iowa 1508

Sand Equivalent T-176

 

  12 months

Iowa 1509

Gyratory Compactor Molds T-312

 

  12 months

Iowa 1524

Vacuum Systems T-209

 

  12 months

Iowa 1510

Pycnometers T-228, T209

 

  12 months

Iowa 1618

Fine Aggregate Anularity T-304

 

  12 months

Iowa 1525

Dynamic Shear Rheometer T-315

 

    6 months

Iowa 1612

Balance Weights M-231

 

  12 months

 

Sample Splitters T-248

 

  12 months

(visual condition)