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Home My WebLink AboutPermit Approval - 11/25/1998COMMONWEALTH OF MASSACHUSETTS EXECUTIVE OFFICE OF ENVIRONMENTAL AFFAIRS DEPARTMENT OF ENVIRONMENTAL PROTECTION SOUTHEAST REGIONAL OFFICE ARGEO PAUL CELLUCCI Governor November 25, 1998 Mr. John Dagostino Town Manager Mansfield Board of Selectmen Town Hall 50 West Street Mansfield, Massachusetts 02048 RE: PERMIT APPROVAL WITH CONDITIONS Application for: BWPSWII LANDFILL MAJOR MODIFICATION POST -CLOSURE MONITORING PLAN LANDFILL GAS MONITORING. WELL. INSTALLATION PLAN AT: Mansfield Municipal Landfill East St/Rte 106 Mansfield, MA Transmittal Number: 97779 Dear Mr. Dagostino: TRUDY CORE Secretary DAVID B. STRUHS Commissioner The Department of Environmental Protection, Solid Waste Management Section, (the "Department") has completed its review of a proposed landfill gas monitoring well installation program for the Mansfield municipal landfill (the "Landfill") located off East Street and found that it is technically complete. The Department reviewed the gas well installation program pursuant to 310 CMR 19.000 Solid Waste Management Regulations and the Department's Landfill technical guidance manual (the "Manual"). The proposed program was submitted by Camp Dresser and McKee Inc. ("CDM"), on your behalf. The Department approves of the proposal subject to the conditions herein. Background On June 1, 1998 the Department issued an approval of the Landfill Major Modification permit application regarding the Post -Closure Monitoring Plan for the Landfill. .Pursuant to'condition 8 of that approval, CDM submitted correspondence: on September 3, 1998, detailing a proposed landfill soil gas survey. On September 15, 1998, CDM notified the Department of exceedances of 25 per cent of the Lower Explosive Limit (LEL) at the property boundary 20 Riverside Drive • Lakeville, Massachusetts 02347 • FAX (508) 947-6557 • Telephone (508) 946-2700 This information is available in alternate format by calling our ADA Coordinator at (617) 574-6872. DEP on the World Wide Web: http://% w .magnet.state.ma.us/dep ry Ca Printed on Recycled Paper 2 detected on September 11, 1998 and proposed an additional soil gas probe investigation. On September 23, 1998, CDM submitted a formal report with the results of the September 11, 1998 field work. On November 2, 1998, CDM submitted the results of field work performed on September 17th and 24th, 1998. The results indicated that landfill gas had migrated northward form the Landfill towards East Street and Landfill gas was present at the southern edge of East Street. Results further indicated that landfill gas was not located in a nearby manhole, nearby catchbasins, or a surface drainage pipe. Proposal Based on the survey results to date, CDM proposes the following: 1) The installation of four (4) permanent gas monitoring wells near the northern Landfill property boundary along East Street, at an approximate 100 foot spacing, 2) The installation of the four wells within 30 days of the Department's approval, 3) The utilization of soil gas probes every 500 feet along the landfill eastern, southern and western property boundaries, 4) The investigation of the vertical extent of landfill gas withinthe soil during permanent well installation, and, 5) The determination of appropriate corrective actions based on the results of a landfill gas survey performed during permanent well installation. Approval The Department has reviewed the above -referenced proposal and in accordance with the authority granted pursuant to M.G.L. c.11l, s150A and 310 CMR 19.000 hereby approves of the Landfill Gas Well Installation Plan and Landfill Gas Survey Plan subject to the following conditions: 1. The permanent probes shall be installed in accordance with the proposed detail. 2. During the construction process odors, dust, erosion, noise and other nuisance conditions shall be kept to a minimum. In the event a nuisance condition exists, abatement measures shall be implemented immediately. 3. Within 30 days of completion of the gas monitoring well installation, a construction certification report shall be submitted that includes: as built drawings of the gas well locations and construction. Additionally, quality assurance /quality control data and written certification that the construction was performed in accordance with the Department's regulations, requirements, the Manual and the approved design shall be provided in accordance with 310 CMR 19.151(4). 4. During monitoring well construction, the Town must further investigate the vertical extent of the soil gas. The Town must determine the appropriate corrective action to mitigate the offsite subsurface migration of landfill gas and submit a Corrective Action Design application (BWPSW25) detailing the proposed mitigative action. 5. In the interim, the Town shall take all actions necessary to ensure public health and safety due to the off -site landfill gas migration including but not limited to: a) Notification to the Board of Selectmen, Board of Health, Department of Public Works, Fire Chief, Building Inspector and any other appropriate Board or town official and all entities which have utilities on or under East Street of the status of landfill gas migration and continuing investigation efforts. b) All potentially affected buildings shall be monitored on a quarterly basis, at a minimum. c) Wherever, there are penetrations of the building foundation, the area in the immediate vicinity should be screened for combustible gases. d) All confined spaces within all buildings should be screened for combustible gases. e) If at any time monitoring detects the presence of any combustible gases at, or in excess of, 10% of the Lower Explosive Limit at any location within the buildings or within any utility conduits on -site or off -site, the Town shall notify the Department's Bureau of Waste Site Cleanup - Emergency Response Section within two (2) hours of the exceedance as per 310 CMR 40.0321(1)(a) of the regulations. Upon.installation of the permanent gas monitoring system, gas monitoring (using wells and probes) must be performed quarterly pursuant to 310 CMR 19.132(40(b), until otherwise approved by the Department. As recommended in the Manual, one quarter should be during .the winter when the ground is frozen. Where soil gas probes are utilized between the landfill and residential areas, the probe spacing should be 100 feet unless it can be demonstrated that exposed groundwater or wetlands are located between the. landfill and any structures. 7. The Townmust undertake all actions necessary to protect public health and safety. It is the Town's responsibility to comply with all other applicable federal, state, and local statutes and regulations as a prerequisite to conducting assessment work at the Landfill. This Approval has been issued pursuant to M.G.L., Chapter 111, Section 150A. Any person or persons who are aggrieved by this action may appeal pursuant to Chapter 30A. An appeal must be commenced no later than thirty (30) days from the date of this Approval. Notice of an action or proceeding to appeal shall be served on the Department upon the commencement of the Appeal. In the event of an Appeal, the Department reserves the right to reopen the permit proceedings, supplement the record and modify the permit. In addition, the Department reserves the right to require additional assessment or action as deemed necessary in order to protect and maintain the environment free from objectionable nuisances, dangers and/or threats to public health. This information is available in alternate format by calling our ADA Coordinator at (617) 574-6872. Should you have any questions regarding the above points, or if you need additional information, please contact me at (508) 946-2884 or Dan Connick at (508) 946-2833 or write to he letterhead address. Please refer to Transmittal #97779 in any corres ondence to this office regarding this Approval. Solid Waste E/DC/re ion 4 cc: Mansfield Town Board of Health Town Hall 50 West Street Mansfield, MA 02048 ATTN: Mr. Scott Liete Mansfield Town Engineer Town Hall 50 West Street Mansfield, MA 02048 ATTN: Mr. Lee Azinheira Camp Dresser & McKee 10 Cambridge Center Cambridge, MA 02142 ATTN: Mr. Richard Spieler DEP - Boston ATTN: J. Doucett