Tomka gas test site (German: Gas-Testgelände Tomka) was secret chemical weapons testing facility near place codenamed Volsk-18 (20 km off Volsk), now Shikhany[1], Saratov Oblast, Russia created within the framework of German-Soviet military cooperation to circumvent the demilitarization provisions of the post-World War I Treaty of Versailles. It was co-directed by Yakov Fishman [ru] (начальник воен­но-химического управления Красной Армии), and German chemists Alexander von Grundherr and Ludwig von Sicherer.