i d be in the cul-de-sac, and we d all look up, and we could hear those roars. in california santa susana mountains rocketdyne engineers had created america s largest prupulgz field laboratory. the whole of the valley would just shudder. launch is go. tens of thousands of rocket tests, and those would produce huge plumes of contamination that would be spreading a substantial distance. engines poured forth their pillars of flames. over 30,000 rocket engine tests, and a lot of the chemical contamination on the site is a result of that. they ended up flushing out rocket test engines with a very toxic solvent called tce, hundreds of thousands of gallons, leaving half a million