70 
(b) Sampling for size: Samples of the crusher product shall be taken either at the 
crusher or from cars as directed by the engineer. The samples shall be mixed from 
runs of the crusher on different days, or if taken from cars, shall be taken from both 
ends and top and bottom of the car. 
(4) Amount and size of sample. — (a) Sampling for quality: A sample shall weigh 
between 25 and 40 pounds and shall consist of pieces of slag at least 1£ inches in size 
and one piece at least 3 by 4 by 6 inches. 
(b) Sampling for size: A sample for size shall weigh not less than 10 pounds for 
material of three-quarters inch maximum diameter or less. Samples of materials of 
other sizes shall increase in weight to a maximum of approximately 60 pounds, vary- 
ing with the size and weight of the largest pieces represented by the sample. The 
sample shall be representative of the product as delivered for use. 
(5) Marking and shipping. — Samples shall be shipped in tight boxes or bags and 
shall be accompanied by a card in the container or securely attached thereto, stating 
date, by whom taken, by whom submitted, source of supply, exact location where 
sample was taken, proposed purpose to which the material is to be put, space for 
remarks, and in case of quarry investigations, owner, quantity available, whether 
material from the same source has been previously used, where and for what purpose, 
and with what results, haul to nearest point on road, average haul to job, character of 
haul, initial cost of slag. 
Notification of sampling containing the above data shall be forwarded separately 
to the laboratory immediately upon taking the sample. 
The conference, recognizing that in general slag is not a uniform product, recom- 
mends that special care should be taken to get a representative sample. 
54. SAMPLING STONE BLOCK. 
(1) By whom taken. — Samples are to be taken by the engineer or his authorized rep- 
resentative. 
(2) When taken. — Samples are to be taken at least days before the block is to be 
accepted or rejected, or when the quality or appearance of the block changes, and at 
such other times as may be directed by the engineer. 
(3) Where and how taken. — Samples shall be taken either from the quarry or from 
cars, a^ directed by the engineer. They shall be representative of the block which it 
is proposed to use; and no samples shall include blocks that would be rejected by a 
visual examination. 
(4) Amount and size of sample. — The sample shall consist of at least 10 blocks. The 
bedding plane shall be marked on at least 2 blocks. 
(5) Marking and shipping. — Samples shall be shipped in tight boxes and shall be 
accompanied by a card in the container, or securely attached thereto, stating date, 
by whom taken, by whom submitted, source of supply, exact location where sample 
was taken, proposed purpose to which the material is to be put, whether mateiial 
from same source has been previously used, where and for what purpose and with what 
results, initial cost of block, haul to nearest point on road, average haul to job, character 
of haul, and space for remarks. 
Notification of sampling, containing the above data shall be forwarded separately to 
the laboratory immediately upon taking the sample. 
55. SAMPLING GRAVEL. 
(!) By whom taken. — Samples are to be taken by the engineer or his authorized rep- 
resentative. 
(2) When taken. — Samples are to be taken from the proposed source of supply at 
least days before the gravel is to be accepted or rejected, also from every 
