(1) Insofar as practicable, purchases and any public works by the district shall be based on competitive bids. A formal sealed bid procedure shall be used as standard procedure for purchases and contracts for purchases executed by the board of commissioners. Formal sealed bidding shall not be required for:
(a) The purchase of any materials, supplies, or equipment if the cost will not exceed the sum of $75,500. However, whenever the estimated cost does not exceed $150,000, the commissioners may by resolution use the process provided in RCW
39.04.190 to award contracts;
(b) Contracting for work to be done involving the construction or improvement of a fire station or other buildings where the estimated cost will not exceed the sum of $150,000 if more than a single craft or trade is involved with the public works project, or a public works project in excess of $75,500 if only a single craft or trade is involved with the public works project;
(c) Contracts using the small works roster process under RCW
39.04.151 through
39.04.154; and
(d) Any contract for purchases or public work pursuant to RCW
39.04.280 if an exemption contained within that section applies to the purchase or public work.
(2) A fire protection district may have its own regularly employed personnel perform work which is an accepted industry practice under prudent utility management without a contract. For purposes of this section, "prudent utility management" means performing work with regularly employed personnel utilizing material of a worth not exceeding $300,000 in value without a contract. This limit on the value of material being utilized in work being performed by regularly employed personnel shall not include the value of individual items of equipment. For the purposes of this section, the term "equipment" includes but is not limited to conductor, cabling, wire, pipe, or lines used for electrical, water, fiber optic, or telecommunications.
(3) For the purposes of this section, "lowest responsible bidder" means a bid that meets the criteria under RCW
39.04.350 and has the lowest bid; provided, that if the district issues a written finding that the lowest bidder has delivered a project to the district within the last three years which was late, over budget, or did not meet specifications, and the district does not find in writing that such bidder has shown how they would improve performance to be likely to meet project specifications then the district may choose the second lowest bidder whose bid is within five percent of the lowest bid and meets the same criteria as the lowest bidder.