APPENDIX II. 



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 as 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. 



2. Name of material. 



3. Name and address of producer, or 



owner of deposit. 



4. Location of plant or deposit. 



5. To be examined for conformity with 



specification. 



6. Name and location of road where ma- 



terial is to be used. 



7. Proposed use and type of construction 



in whicli material is to be used. 



8. Date sample taken. 



9. Place sample taken. 



10. Sample taken from (quarry, crusher, 



bin, pit, plant, car, storage pile, or 

 mixer). 



11. Quantity represented by sample. 



12. Material shipped in ear No. ■ . 



13. Date material shipped. 



14. Date material received at destination. 



15. Date vised or to be used if satisfactory. 



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 men- 

 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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