R.W. Sidley, Inc. received approval from the Pennsylvania Department of General Services (DGS) for the state’s COSTARS program as a qualified supplier for Water & Wastewater Treatment Consumables. COSTARS is the Commonwealth of Pennsylvania's cooperative purchasing program and serves as a conduit through which registered and eligible local public procurement units (LPPUs) and state-affiliated entities (together "Members") are able to leverage contracts established by DGS to cost-effectively and efficiently identify suppliers with whom to do business. 
The goals of this program are:

  • To encourage, expand, and facilitate the opportunities for Members to achieve procurement savings and the best value through an interactive partnership with the Commonwealth.
  • To provide increased opportunities for Suppliers of any size to participate and compete for Members' business.
  • To provide contracts with competitive pricing.   

R.W. Sidley’s operates a state-of-the-art processing plant that produces the highest quality products virtually free of deleterious materials. Our processed silica sands and gravels are from our Thompson mine part of the Sharon conglomerate formation. All silica filter sands and gravels are washed, dried and screened at the Thompson plant and meet AWWA B-100 standards for granular filter media and NSF-61 requirements for drinking water components.

R.W. Sidley, Inc. is approved for the following product categories, all products are available in standard sizes and U.C. 1.5-1.7, tighter U.C. sizes available upon request. Available packaging: bulk, 50 lb. bags and super sacks.

  • Filter Media – Anthracite
  • Filter Media – Garnet
  • Filter Media – Gravel
  • Filter Media - Sand

Please contact us for specifications, testing or samples.

Vendor Number 161325
7123 Madison Road
Thompson, OH 44086


Rob Sidley, VP/Aggregate Sales
440.298.3232 Ext.3135

Mike Mongell, Silica Product Line Manager