COUNTY OF HILLSBOROUGH (TAYLOR RD LANDFILL) - SEFFNER, FL FILED 10/9/80, CIVIL ACTION #80-1128, US DIST CT FOR THE MIDDLE DIST OF FL, LEAVE TO AMEND COMPLAINT TO ADD CERCLA COUNTS FILED WITH COURT ON 6/15/82. THE SECOND AMENDED COMPLAINT WAS FILED ON 3/18/82. THE TAYLOR RD LANDFILL IS A 272 ACRE WSTE DISPOSAL SITE IN SEFFNER, FL OWNED & OPERATED BY HILLSBORO CNTY. THE LANDFILL IS COMPOSED OF 3 SEPARATE AREAS, A 42 ACRE SITE(TAYLOR ROAD), A 10.6 ACRE SITE(BORROW PIT EXPANSION) & THE STILL ACTIVE 64 ACRE SITE(HILLSBORO HEIGHTS). DISPOSAL OPER AT LANDFILL HAVE CONTAMINATED SOIL & CRNDWTR & THREATEN CONTAMINATION OF A PUBLIC WTR SRC. THE SITE OVERLIES THE FL AQUIFER, A SRC OF WTR FOR MUCH OF THE SW US & A PRINCIPAL WTR SRC FOR HILLSBORO. SOME 580 PRIVATE WELLS ARE W/I 1 MILE OF THE SITE. THE 42 ACRE SITE IS ALLEGED TO HAVE BEEN DISIGNED, CON ST & OPERATED IMPROPERLY. NO GEO ANALYSIS WAS PERFORMED BEFORE CONST & SITE IS UNLINED. IT CONTAINS MANY SINKHOL- ES WHICH SERVE AS SRC'S OF RECHRG FOR THE AQUIFER & ALSO PROVIDE CONDUITS FOR CONTAMINANTS TO PERCOLATE FROM THE SURFACE TO THE GRNDWTR. IN OCT '79 EPA SAMPLED THE POT- ABLE WTR SUPPLY & MONITORED WELLS AT OR NEAR THE 42 ACRE SITE. ANALYSIS OF SAMPLES COMPLTD IN DEC '79 REVEALED CONTAMINAT'N OF MONITORED WELLS W/ORGANIC COMPDS & METALS . CONCENTRAT'N INDICATED MIGRATION OF CONTAMAINANTS AWAY FROM CENTER OF SITE AMONG THE COMPDS