PUBLIC HEALTH ASSESSMENT
BEEDE WASTE OIL
PLAISTOW, ROCKINGHAM COUNTY
- A public health hazard exists for the ingestion and inhalation of volatile organic chemicals(VOCs) in residential drinking water. VOCs in residential drinking water represent a low potential for both carcinogenic and non-carcinogenic adverse health effects. No acute adverse health effects are anticipated. Exposure to VOCs in drinking water is presently occurring, has likely occurred in the past and will likely continue in the future since there is no access to municipal drinking water in the area. NH DES has limited exposure through the supply of bottled water to the Howard Manor Condominiums and the recent installation of a point-of-entry (POE) treatment device at this complex.
It should be noted that the levels of VOCs which constitute this public health hazard are currently being detected at very low levels. The small increased risk for adverse health effects is based on a 30-year exposure to contaminated drinking water. The chance of any health effects occurring will decrease or increase depending on future levels of contamination and the duration of exposure. Residents at the Howard Manor Condominiums who were estimated to be at the highest risk from VOC exposure will be effectively protected so long as the POE treatment system continues to remove contaminants.
- A public health hazard exists for those residents with drinking water wells which tested positive for arsenic. To date, three bedrock wells have tested positive for arsenic at levels which represent a low increase in cancer risk. No non-carcinogenic adverse health effects are anticipated to result from arsenic levels detected in these wells. Arsenic is a naturally occurring element commonly found in bedrock wells in New Hampshire and is not thought to be site related.
- No apparent public health hazard exists for residents from exposure to VOCs off-gassing directly from overburden groundwater into indoor air.
- No apparent public health hazard exists for recreators who come in direct contact with contaminants in soil, sediment and surface water along Kelley Brook east of the BWO site.
- An indeterminate health hazard exists for residents eating Kelley Brook fish potentially contaminated with PCBs. This pathway will be evaluated following biota sampling (fish and macro invertebrates) in Kelley Brook to be conducted in the spring and fall of 1996 by NH DES.
- An indeterminate health hazard exists for former workers at the Beede Waste Oil site. The extent of this exposure cannot be determined due to the incomplete characterization of the site. Documented contamination of soil and stored waste oil with PCBs, buried drums of organic solvent waste, multiple surface spills from storage tanks and free product located beneath the abandoned building suggest the potential for past worker exposure via contact with contaminated soil and waste oil and inhalation of VOCs in indoor air in the abandoned building.
- An indeterminate public health hazard exists for nearby residents via ingestion of and dermal contact with residential soil potentially contaminated with PCBs migrating from on-site soil. On-site soil characterization is currently insufficient to evaluate this pathway. Off-site residential soil sampling data is not currently available. NH DPHS is exploring options for further PCB soil sampling in order to better determine the potential for off-site PCB migration.
- An indeterminate health hazard exists for trespassers on the site. Surface soil characterization is currently insufficient to determine the extent of contamination and the subsequent risks to frequent trespassers exposed via incidental ingestion of and dermal contact with soil.
- NH DPHS recommends that exposure to site related contaminants in residential drinking water be reduced or eliminated. It is understood that NH DES has been supplying the residents of Howard Manor Condominiums with bottled water and that a point-of-entry (POE) treatment device for this well is now operational and should reduce all routes of exposure to VOCs below a level of concern. Sample analysis has verified the effectiveness of this treatment system and consequently, NH DPHS recommends no further restrictions on the use of the Howard Manor treated water.
- NH DPHS recommends that off-site monitoring of residential drinking water wells for VOCs be continued along with notifications to NH DPHS of any detected contaminants. A repeat analysis for PCBs and lead is also recommended for nearby residential drinking water wells due to high levels of these contaminants in on-site monitoring wells. Residents with elevated arsenic levels should follow the recommendations provided by NH DPHS in previous evaluations. These recommendations did not restrict use on the arsenic containing wells but did suggest periodic monitoring.
- NH DPHS recommends that the free product located in the overburden aquifer on Parcel 1 be removed or contained. This source of groundwater contamination is a likely contributor to off-site residential well contamination. Also, migration of free product through the interceptor trench and into Kelley Brook should be contained.
- NH DPHS recommends that PCB contamination in on-site surface soil be better characterized particularly in areas along the northern and southern borders of Parcel 1 that abut residential properties. PCB surface soil contamination in this area would indicate an increased potential for off-site migration to residential soils. In the absence of this data, NH DPHS has requested assistance from ATSDR to characterize off-site surface soil in order to determine whether site abutting residents are being exposed to PCBs in yard soil that may have migrated from on- site areas.
- NH DPHS recommends that access to Parcel 1 be completely restricted in order to prevent any recurrence of trespass. Although available data does not indicate soil contamination at levels of concern for trespassers, current data is not adequate to characterize risk to trespassers. There is also a concern that vandalism could cause further release of and exposure to stored hazardous waste. It is understood that the abandoned building (target of previous vandalism and arson) and the 800 55-gallon drums located behind the main building have been secured by barbed wire fencing.
- NH DPHS recommends that a community health education effort be conducted in order to educate exposed and potentially exposed residents as to the hazards posed by VOC contaminated drinking water and PCB contaminated soil, sediment and fish.
The Public Health Assessment for the Beede Waste Oil site,Plaistow, Rockingham County, New Hampshire, was evaluated by theHealth Activities Recommendations Panel (HARP). Based on theconclusions of the state health assessor and the Panel, we proposethat the following statement be included in the PHA for this site:
The data and information evaluated in the Public Health Assessmentfor the Beede Waste Oil site, Plaistow, New Hampshire, has beenreviewed by ATSDR's Health Activities Recommendations Panel forappropriate follow-up with respect to health activities. The paneldetermined that community health education is indicated, as needed.Based on current data and information, no health studies areindicated at this time; however, the panel requested that they reviewany evaluation of new data and information as they become available.
The Public Health Action Plan (PHAP) for the Beede Waste Oil siteis outlined below. The purpose of the PHAP is to ensure that thishealth assessment not only identifies public health hazards, butprovides a plan of action designed to prevent or mitigate adversehuman health effects resulting from exposure to hazardous substancesin the environment. Included is a commitment on the part of ATSDR andNH DPHS to ensure that these actions are taken.
- NH DES is currently monitoring residential drinking water wellsin the area of the Beede Waste Oil site for VOC contamination.
- NH DES supplied bottled water to the residents of Howard ManorCondominiums from July, 1994 to May, 1995. NH DES installed a POEtreatment system on the bedrock well serving these residents inFebruary, 1995. Bottled water shipments ceased in May of 1995following two separate sample analyses which detected no VOCs in thiswell demonstrating the effectiveness of the POE system. SubsequentVOC analyses on this well have confirmed this result.
- NH DPHS is continuing to evaluate the results of residentialwell drinking water analyses performed by NH DES on samples takenfrom wells near the Beede Waste Oil site. These evaluations arecommunicated to residents with appropriate recommendations on wateruse.
- NH DES is currently conducting an investigation to furthercharacterize on-site conditions. Activities include full mediasampling, monitoring well installations and surface geophysics. Datafrom this investigation were presented in a report released inSeptember, 1995 and have been incorporated into this public healthassessment.
- EPA is currently designing a free product recovery system forthe site. This system is expected to be operational in early 1997.
- EPA has completed a Hazard Ranking System (HRS) package todetermine if the site is eligible for the National Priorities List(NPL). The site is expected to be formally proposed for listing onthe NPL in the spring of 1996.
- NH DPHS plans to conduct a community health education effort inorder to help affected local residents better understand the natureand degree of the hazards posed by VOC contamination of residentialdrinking water and PCB contamination of soil, sediment and fish.
- NH DPHS plans to conduct further PCB surface soil sampling inconjunction with ATSDR and NH DES in order to better characterize thepotential for exposure to PCBs in soil migrating from on-site sourceareas into abutters yards.
- NH DES plans to conduct biota sampling for PCBs in Kelley Brookmacro invertebrates (summer 1996) and fish (fall 1996). The resultsof this sampling will allow a better estimation of the potential forexposure to PCBs via fish ingestion.
New environmental, toxicological or health outcome data as well asresults from the implementation of the above proposed actions maydetermine the need for additional actions at the site. Therefore,ATSDR will re-evaluate and expand the PHAP as needed and provideannual follow-up outlining the actions completed and those inprogress.
This report will be made available to the public through locallibraries and upon request.
Environmental Health Analyst
New Hampshire Division of Public Health Services
Bureau of Health Risk Assessment
Senior Regional Representative
Office of Regional Operations
Environmental Health Engineer
Superfund Site Assessment Branch
Division of Health Assessment and Consultation
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