Abstract: A kit for forming a secondary confinement installation for protecting earth from contamination due to leakage and spills from pipelines in small installations, such as service stations. The kit includes long trough sections and short connector sections with joints therebetween which maintain a level floor. The connector sections may have various shapes, such as right angle sections, half-right angle sections, T-sections, as well as a few special purpose sections. The special purpose sections include a sump section located at the low point of the installation, a dispenser unit section intended to provide catch basis for fluid dispensers and box sections which protect pipe egress zones at storage tanks.