ABSTRACT
T h e so u th easte rn , P en n sy lv an ia site is s ituated o n h ig h g ro u n d w ith d ro p -o ffs to the n o rth , east, and w est. T h e site is n ea rly 9 ac res in s ize an d in c lu d es tw o p lan t b u ild in g s th a t w e re u sed fo r p r in tin g o p e ra tio n s (F ig u re 1). T h e p r in tin g o p e ra tio n s a t th e site in c lu d ed th e u se o f te trach lo ro e th en e (P C E ) as a so lv e n t f ro m 1957 to 1990. O rig in a lly , P C E w as p e r io d ica lly d e liv e red to th e p la n t in b u lk and s to red in tw o 2 5 0 g a llo n steel U n d erg ro u n d S to rage T an k s (U S T s). In 1975, tw o new steel U S T s w ere insta lled and the fo rm e r tanks w ere c lo sed . T he so lv en t w as p ip ed in to th e b u ild in g an d u sed fo r "type w ash " to c le a n lead d ies an d m a c h in e ry u se d in th e p r in tin g p ro ce ss . T h e w aste f ro m th is p ro c e ss w as p ip ed to th e w aste so lv en t U S T . P C E an d so lv en t tan k u sa g e w as d isc o n tin u e d in 1990.
