EnvTech Neutral pH HF Alky Unit decontamination process is our specialty. We are proud to offer the only Proven, Neutral pH, HF Alkylation Decontamination service. EnvTech has seen and performed every type of HF equipment decontamination, from simple to Full Unit decommissioning. The EnvTech pH-neutral cleaning process has been in use by EnvTech since 1991.