GRAG: Particle Size Distribution Analysis - General¶

Heading	Unit	Type	Example	Description
LOCA_ID		ID	327-16A	Location identifier
SAMP_TOP	m	2DP	24.55	Depth to top of sample
SAMP_REF		X	24	Sample reference
SAMP_TYPE		PA	U	Sample type
SAMP_ID		ID	ABC121415010	Sample unique global identifier
SPEC_REF		X	1a	Specimen reference
SPEC_DPTH	m	2DP	24.55	Depth to top of test specimen
SPEC_DESC		X	Grey slightly gravelly clay	Specimen description
SPEC_PREP		X	Prepared according to client instructions	Details of specimen preparation including time between preparation and testing
GRAG_UC		1SF	10	Uniformity coefficient D60/D10
GRAG_VCRE	%	1DP	0	Percentage of material tested greater than 63mm (cobbles)
GRAG_GRAV	%	1DP	30.1	Percentage of material tested in range 63mm to 2mm (gravel)
GRAG_SAND	%	1DP	40.4	Percentage of material tested in range 2mm to 63um (sand)
GRAG_SILT	%	1DP	14.5	Percentage of material tested in range 63um to 2um (silt)
GRAG_CLAY	%	1DP	15	Percentage of material tested less than 2um (clay)
GRAG_FINE	%	1DP	29.5	Percentage less than 63um
GRAG_REM		X		Remarks including commentary on effect of specimen disturbance on test result
GRAG_METH		X	BS1377	Test method
GRAG_LAB		X	ACME Laboratories plc	Name of testing laboratory/organisation
GRAG_CRED		X	UKAS 0000	Accrediting body and reference number (when appropriate)
TEST_STAT		X	Checked	Test status
FILE_FSET		X	F21	Associated file reference (eg equipment calibrations)

Notes - 2¶

GRAG is to be used to transfer the general information on particle size distribution testing including laboratory name and test accreditation details to be transferred within the AGS Format file. The GRAD group in AGS 2 and 3 was not capable of efficiently transferring this data.
The data in GRAG_CRED indicates the accreditation status of the testing as a whole. Therefore if part of the test method used, for example the pipette rather than the sieve, is not accredited, the GRAG_CRED should be appropriately qualified or left empty.