▁limits . ▁This ▁project ▁is ▁carried ▁out ▁by ▁a ▁NASA ▁project ▁team ▁and ▁monitor ed ▁by ▁the ▁U . S . ▁Environment al ▁Prote ction ▁Agency . ▁Fre quent ▁public ▁meet ings ▁are ▁held ▁with ▁public ▁comment , ▁and ▁recorded ▁for ▁the ▁record ▁on ▁the ▁quality ▁and ▁progress ▁of ▁the ▁clean - up . ▁ ▁Cross ings ▁From ▁mouth ▁to ▁source ▁( year ▁built ▁in ▁parentheses ): ▁ ▁Rail road ▁North ▁Avenue ▁ 1 9 ▁- ▁tw in ▁brid ges ▁( 1 9 5 6 ) ▁North ▁San ▁Fernando ▁Road ▁( 1 9 1 3 ) ▁Inter state ▁ 5 ▁- ▁Golden ▁State ▁Fre ew ay ▁and ▁ram ps ▁( 1 9 6 2 ) ▁West ▁Avenue ▁ 2 6 ▁( 1 9 3 9 ) ▁South bound ▁State ▁Route ▁ 1 1 0 ▁r amp ▁to ▁Inter state ▁ 5 ▁( 1 9 6 2 ) ▁ ▁Inter state ▁ 5 ▁r amp ▁to ▁north bound ▁State ▁Route ▁ 1 1 0 ▁( 1 9 6 2 ) ▁Cy press ▁Avenue ▁[ P ed est rian ▁Bridge ] ▁Rail road ▁- ▁Metro ▁Gold ▁Line ▁Pas ad ena ▁Avenue ▁( 1 9 4 0 ) ▁State ▁Route ▁ 1 1 0 ▁ram ps ▁to ▁East ▁Avenue ▁ 4 3 ▁( 1 9 4 0 ) ▁East ▁Avenue ▁ 4 3 ▁( 1 9 3 9 ) ▁Sy cam ore ▁Gro ve ▁Park ▁[ P ed est rian ▁Bridge ] ▁South / E ast ▁Avenue ▁ 5 2 ▁( 1 9 4 0 )