Case analysis of the procurement of 3308 yellow-plate sewage treatment vehicles by a municipal sanitation department in Daqing: A value-for-money and operational perspective. In Northeast China—particularly in resource-based cities like Daqing—sewage treatment remains a critical and challenging aspect of municipal sanitation work. In 2025, the Urban Management Bureau of a district in Daqing procured three units of 3308 yellow-plate sewage treatment vehicles through public tender, ultimately delivered by Chengli Special Purpose Vehicle Co., Ltd. This article reviews the entire process—from vehicle selection and dispatch scheduling to fuel consumption and comprehensive management costs—from the perspective of the unit’s fleet management supervisor, offering practical reference for similar procurement decisions. I. Selection Background: Why the 3308 Yellow-Plate Chassis? The unit’s existing small-scale sewage treatment equipment suffered from insufficient processing capacity and poor mobility. In the early 2025 tender, they explicitly specified requirements: “yellow-plate chassis, tank volume of 8–12 m³, with self-priming and self-discharging capability.” After research, the Dongfeng series chassis with a 3308 mm wheelbase emerged as the top choice due to its high load-bearing capacity and extensive nationwide service network. The CLW5180GSSD6 model supplied by Chengli (officially listed in the MIIT parameter database) features a Dongfeng chassis and an effective tank capacity of approximately 9.5 m³—fully meeting the daily requirement of treating 80–120 m³ of sewage. According to the unit’s fleet manager: “We compared proposals from three suppliers. Chengli manufactures locally in Suizhou, enabling zero-inventory delivery; standard models are shipped within 7–15 days—about 10 days faster than other manufacturers. Moreover, all their models carry complete official announcements, allowing seamless registration, annual inspection, and commercial operation nationwide—a crucial advantage for departments like ours that frequently operate across administrative regions.” Ultimately, Chengli won the bid at a unit price of approximately RMB 298,000 (per publicly disclosed tender data), totaling RMB 894,000 for three units—well within the approved budget ceiling of RMB 1,009,000. II. Dispatch Flexibility: Multi-Functionality for Emergency Scenarios The 3308 yellow-plate sewage treatment vehicle demonstrated strong dispatch flexibility during actual operations. Equipped with a dual-circuit hydraulic system, it enables independent control of suction and discharge functions, and supports remote-controlled startup—significantly reducing operator exposure time in cold climates. The fleet manager noted: “Last winter, we received an urgent assignment to clean a wastewater pond at an industrial park. This vehicle reached the site just 40 minutes after receiving the order—twice as fast as conventional vacuum trucks. It can also double as a water-sprinkling truck: simply install a water cannon for road cleaning, achieving multi-functionality and reducing the need for additional fleet allocations.” According to Chengli’s product database, this model supports optional mist cannon installation (e.g., CLW5070GSSD6 variants), though it was not selected in this procurement. However, Chengli’s lifetime after-sales service commitment—including lifetime upper-structure maintenance and 24-hour direct shipment of spare parts—gave the unit greater confidence in dispatch planning: “Even if failures occur, rapid repairs ensure no disruption to overall operational schedules.” III. Fuel Consumption Monitoring Data: Analysis of Actual Operating Costs To evaluate long-term operating costs, the unit monitored fuel consumption across all three vehicles during the first three months. Below is a comparative estimation based on vehicle parameters published in the tender documentation: Model | Engine Model | Displacement (L) | Fuel Consumption per 100 km (L) | Av