After the fine grade and all curbs have been constructed
to the satisfaction of the Town Superintendent of Highways, the developer
shall furnish and place a foundation course of approved run-of-bank
gravel, crusher-run stone or crusher-run gravel to the depths as called
for in these specifications. All materials acceptable for these courses
shall be hard, durable and sound and shall be well-graded from coarse
to fine. One hundred percent by weight of the particles shall be of
such size as will pass through a four-inch-square hole, not less than
30% shall pass the one-fourth-inch sieve, not more than 70% by weight
pass the No. 40-mesh sieve and not more than 10% by weight pass the
No. 200-mesh sieve.