This bid is for chemical root control treatments of mainline sanitary sewers at on-road and off-road locations throughout Baltimore County, Maryland.
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What the job is
Estimated quantities: 150,000 linear feet of 6–12-inch pipe; 2,800 linear feet of 14–16-inch pipe; 2,200 linear feet of 18–21-inch pipe; and 1,000 linear feet of pipe 22 inches and larger.
Treatment: Pressurized foam application using a non-systemic herbicide registered for sanitary sewer root control with EPA and the Maryland Department of Agriculture; no heavy metal compounds or metam-sodium. Sewer service must remain uninterrupted.
Scheduling: One-year term starting August 1, 2027, with four optional annual renewals. Normal work hours are Monday–Friday, 7 a.m.–5 p.m. No treatment during precipitation or within 24 hours afterward; flow depth must remain below 50% unless authorized.
Guarantee: No live roots within six months and no root-related surcharges or overflows for two years; qualifying paid repeat treatments require a three-year guarantee.
Pricing: Provide unit rates per linear foot for each diameter range, including labor, chemicals, equipment, mobilization, manhole access, flow control, and documentation. Separately price five traffic control setups.