QUICKLIME SPECIFICATIONS
MATERIAL
The quicklime to be furnished under this Contract shall meet or exceed ANSI/AWWA B202-19 (herein referred to as "B202"), or the latest revisions made to this specification, unless modified herein, and shall also be in accordance with ANSI/NSF 60, unless sections common to both standards should conflict, in which case the B202 standards shall be in effect.
This product shall be suitable for use in the potable water industry in the treatment and softening of potable water.
It shall be of the best quality, shall be freshly burned, and shall be substantially free of course, siliceous residue, stones, carbonate solids, and any other foreign objects or matter that may interfere with the use of the lime, or the slaking of the quicklime, or cause any damages to the City of Dubuque’s (hereinafter "City") equipment or facilities.
The lime shall be classed by size known as one-half inch (1/2") with a minimal amount of dust and fine material allowed. All quicklime furnished shall be crushed and screened to be from one quarter inch (1/4”) to three quarters inch (3/4”) size. The City will verify the materials using standard sieves per B202.
The quicklime supplied under this specification shall have a guaranteed available Calcium Oxide (CaO) content greater than or equal to ninety percent (90%). The quicklime analysis supplied with the bid shall indicate the available Calcium Oxide (CaO) content.
The quicklime supplied under this specification shall be highly reactive when the “Slaking Rate Test” is performed as listed in B202. This highly reactive lime shall produce a temperature rise of not less than forty degrees centigrade (40 deg C) in three minutes (3 min.) or less. The quicklime analysis supplied with the bid shall indicate the temperature rise and the time required to attain it.
The quicklime supplied under this specification shall be freshly burnt and shall be substantially free of insoluble material. The amount of such material as determined by the “Objectionable Insoluble Matter Test” listed in B202 Section 5.5 shall not exceed 5% as stated in B202 Section 4.2.1
GUARANTEE
The bidder must state in the proposal the minimum percent available Calcium Oxide proposed and guarantees to furnish throughout the life of the contract. In awarding the contract, the proposal may be computed by the City on the basis of 100% available Calcium Oxide content, as may be deemed to be in the best interest of the City. The Bidder must file an Affidavit of Compliance that states all quicklime to be furnished through this contract complies with all applicable requirements of B202.
TESTING- BIDDER OBLIGATIONS
All Bidders, shall provide a written quicklime sample analysis providing the following based on a tested 2.0kg sample:
• The available Calcium Oxide (CaO) content as percentage
• Documentation of a temperature rise of not less than forty degrees centigrade (40 deg C) in three minutes (3 min.) or less.
• Documentation of the sample being substantially free of insoluble material
Once contracted, the City reserves the right to sample and analyze any load or portion of a shipment of lime to determine compliance with the Bidder's bid statements, quality guarantee, and ability to meet these specifications, and the analytical procedures addressed above.
The City also reserves the right to conduct an on-line pilot test of two loads up to 60 tons of proposed lime product prior to accepting the supplier’s bid. The purchase cost for the test lime product shall be calculated based upon the supplier’s proposed unit price. Determination of the necessity, performance methods and evaluation criteria of all such pilot testing shall be solely at the discretion of the City.
