Stage of Clean-up: Construction Completed
Conditions at listing (October l98l): The Sylvester (Gilson Road) Site covers 20 acres in a residential area of Nashua, New Hampshire. During the l970s, a 6-acre former sand/gravel pit became a dump for household refuse, demolition materials, chemical sludges, and hazardous liquids. High concentrations of HEAVY METALS and organic chemicals contaminate the underlying ground water, which formed a plume that moved rapidly toward Lyle Reed Brook. The brook is a tributary of the Nashua River, which is a source of drinking water. The dumping at the site was first discovered in late l970. After several court appearances and court actions, an injunction was issued in l976 to remove all material from the site. However, operations continued, and in November l978, State personnel observed drums being sorted at the site. A court order was issued in October l979 prohibiting all further disposal of hazardous wastes on the site. Between June l980 and June l982, EPA, first under Section 3ll of the Clean Water Act and later under CERCLA, installed a system to temporarily pump and recirculate contaminated ground water, thus preventing it from reaching Lyle Reed Brook, preventing further contamination of the aquifer, and controlling air pollution by volatile chemicals. The total cost was $925,000. More...
Sources of Contamination:
- Dumping - unauthorized