(81) The Settlement Agreement therefore excluded from Gross Section 7(i) Revenues the first $100,000 of gross revenues derived from sales of "sand, stone, gravel,
pumicite or cinder resources" each fiscal year.
It also examines how availability issues of the main SCM are opening the door to a) natural pozzolans, including some diatomaceous earths, opaline cherts and shales, tuffs and volcanic ashes,
pumicite, plus various calcined clays and shales; and b) alternative SCM, defined as inorganic materials that react, pozzolanically or hydraulically, and contribute to concrete strength, durability and workability, but do not meet ASTM or AASHTO specifications for conventional SCM.