APPENDIX ILI. 
METHODS OF SELECTING AND SHIPPING SAMPLES. 
The following directions for selecting and shipping samples of nonbituminous 
materials should be followed in connection with materials which are to be 
tested in the laboratory for conformity with the foregoing specifications. It 
should be noted that most of the tests for size or grading of broken stone, slag, 
gravel, sand, etc., may and should be made frequently in the field or at the 
plant with a set of screens or sieves and a rough balance. 
General Directions.—(1) Samples should be taken so as to represent as 
nearly as possible an average of the bulk of material sampled, and in case of 
principal materials for the higher types of roads, they should also be selected 
with a view to ascertaining the maximum variation in characteristics which the 
materal may possess. (2) Samples should be packed in such manner es to 
withstand rough shipment, and special precautions should be taken to prevent 
the obliteration or removal in transit of tags or identification marks. (3) Noti- 
fication of shipment of samples, with statement of identification marks and 
such other descriptive information as may be necessary should be promptly 
forwarded to the laboratory. 
Information Accompanying Samples.—Whenever possible, the following 
information should be furnished the laboratory in connection with each sample 
submitted : 
1. Identification mark. 8. Date sample taken. 
2. Name of material. 9. Place sample taken. 
8. Name and address of producer, or | 10. Sample taken from (quarry, crusher, 
owner of deposit. bin, pit, plant, car, storage pile, or 
4. Location of plant or deposit. mixer). 
5. To be examined for conformity with | 11. Quantity represented by sample. 
specification. 12. Material shipped in car No. 
6. Name and location of road where ma- | 18. Date material shipped. 
terial is to be used. 14. Date material received at destination. 
7. Proposed use and type of construction | 15. Date used or to be used if satisfactory. 
in which material is to be used. 
Time and Plant of Sampling.—(1) Whenever practicable, nonbituminous 
materials should be sampled at the place of occurrence or manufacture at such 
time as to allow the test controlling acceptance or rejection to be made in 
advance of shipment. (2) When impracticable to take samples as above met- 
tioned, they should be taken from the shipment immediately upon delivery. (3) 
Samples should always be taken when the appearance or quality of the material 
changes. 
BROKEN STONE. 
Sampling for Quality——When tests for physical properties are required, a 
preliminary sample should be taken from each proposed source of supply at 
least two weeks before final acceptance. The preliminary sample may, however, 
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