UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 1 5 Post Office Square, Suite 100 BOSTON, MA 02109-3912 CERTIFIED MAIL - RETURN RECEIPT REQUESTED July 15, 2015 Mr. Todd J. McCabe, Project Executive Consigli Construction Company 72 Summer Street Milford, MA 01757 Re: Authorization to discharge under the Remediation General Permit (RGP)-for the Smith Campus Center of Harvard College site located in Cambridge, Massachusetts; Authorization# MAG910689 Dear Mr. McCabe: Based on the review ofa Notice of Intent (NOI) you submitted on behalf ofthe President and Fellows of Harvard College for the site referenced above, the U.S. Environmental Protection Agency (EPA) hereby authorizes you, as the named Operator, to discharge in accordance with the provisions ofthe RGP at that site. Your authorization number is listed above. The checklist enclosed with this RGP authorization indicates the pollutants which you are required to monitor. Also indicated on the checklist are the effluent limits, test methods and minimum levels (MLs) for each pollutant. Please note that the checklist does not represent the complete requirements ofthe RGP. Operators must comply with all ofthe applicable requirements ofthis permit, including influent and effluent monitoring, narrative water quality standards, record keeping, and reporting requirements, found in Parts I and II, and Appendices I-VIII ofthe RGP. See EPA's website for the complete RGP and other information at: http://www.epa.gov/regionl/npdes/mass.html#dgp. Please note the enclosed checklist includes parameters that were detected in your sampling and that may have exceeded Appendix III limits. Please note that the metals included on the checklist are dilution dependent pollutants and subject to limitations based on a dilution factor range (DFR). Due to the dilution at the point ofdischarge of 112, the DFR applicable for this pollutant is equal to the greater than 100 dilution factor category established in the RGP. (See the RGP Appendix IV for Massachusetts facilities). Therefore, the following limits will apply to the effluent ofthis treatment system: chromium (+3) - 1710 ug/1, copper- 520 ug/1, iron- 5,000 ug/1, nickel-2380 ug/1, silver- 115 ug/1, Total Suspended Solids (TSS) - 30 mg/1 and a pH range of6.5-8.3 standard units (s.u.). There is also a monitoring requirement for total chloride. This EPA general permit and authorization to discharge will expire on September 9, 2015. You have reported this project will terminate on September 1, 20 15. Please be aware you are required to reapply for coverage after the EPA expired permit has been reissued, ifyour project is extended beyond the permit expiration date. The reissuance date as well as the reapplication submittal date will be posted on the EPA web site at that time. Also, regardless ofyour project termination date you are required to submit a Notice of Termination (NOT) to the attention ofthe contact person indicated below within thirty (30) days ofthe termination ofthe discharge. Thank you in advance for your cooperation in this matter. Please contact George Papadopoulos at (617) 918-1579 or [email protected], if you have any questions. Sincerely, ·'/1vJnv, Y\L~~A-rrfvt~ Thelma Murphy, Chief Storm Water and Construction Permits Section Enclosure cc: Robert Kubit, MassDEP Sandra Saccone, President and Fellows ofHarvard College Elizabeth J. Christmas, Haley and Aldrich 2 2010 Remediation General Permit Summary of Monitoring Parametersill NPDES Authorization Number: MAG910689 Authorization Issued: July 15, 2015 ' Facility/Site Name: Smith Campus Center - Harvard College Facility/ Site Address: Email address of owner: Sandra [email protected] Le.gal Name of Operator: Consigli Construction Company Operator contact name, t itle, Todd J. McCabe Project Executive and Address: Email: Estimated date of The Project Comj)~letion : ISeptember 1 2015 Contaminated Construction Dewatering Category- Category and Sub-Category: General Urban Fill Sites Subcategory RGP Termination Date: September 2015 Receiving Water: Charles River Monitoring &. Limits are applicable if checked. All samples are to be collected as grab samples Effluent LimitLMethod# LML (All Effluent Limits are shown as Daily Parameter Maximum Limit, unless denoted by a **, in that case it will be a Monthly Average Limit ) 1. Total Suspended Solids 30 milligrams/liter (mg/L) **, v' (TSS) Me#160.2/MLSug/L 2. Total Residual Chlorine Freshwater = 11 ug/L ** Saltwater = (TRC) 1 7.5 ug/L **/Me# 330.5/ ML 20ug/L 3. Total Petroleum 5.0 mg/L/ Me# 1664A/ ML 5. 0mg/ L Hydrocarbons (TPH) Freshwater = 5.2 ug/1 ** Saltwater = 1.0 4. 2 3 Cyanide (CN) • ug/L **/ Me#335.4/ ML l Oug/L 5ug/L /50.0 ug/L for hydrostatic testing 5. Benzene ( B) only/ Me# 8260C/ ML 2 ug/ L (limited as ug/L total BTEX)/ Me# 8260C/ 6. Toluene (T) ML 2ug/L (limited as ug/ L total BTEX) Me#8260C/ Ethylbenzene ( E) 7. ML 2ug/L (limited as ug/L total BTEX) Me#8260C/ ( m,p,o) Xylenes (X) 8. ML 2ug/L 9. Total Benzene, Toluene, Ethyl Benzene, and Xylenes 100 ug/L/ Me# 8260C/ ML 2ug/ L (BTEX) 4 3 Effluent LimitlMethod# LML (All Effluent Limits are shown as Daily Parameter Maximum Limit, unless denoted by a **, in that case it will be a Mont hly Average Limit) 10. Ethylene Dibrom ide (EDB) 0.05 ug/1/ Me#8260C/ ML 10ug/L {1,2- Dibromoethane) 11. Methyl-tert-Butyl Ether 70.0 ug/I/Me# 8260C/ML 10ug/L (MtBE) 12.tert-Butyl Alcohol (TBA) Monitor Only(ug/ L)/Me# 8260C/ML 10ug/L (TertiaryButanol) 13. tert-Amyl Methyl Ether Monitor Only(ug/L)/Me# 8260C/ML 10ug/L (TAME) 14. Naphthalene s 20 ug/L /Me#8260C/ML 2ug/L 15. Carbon Tetrachloride 4.4 u_g/L /Me#8260C/ ML 5ug/L 16. 1,2 Dichlorobenzene (o- 600 ug/L /Me#8260C/ ML 5ug/ L DCB) 17. 1,3 Dichlorobenzene (m- 320 ug/L /Me#8260C/ ML 5ug/L DCB) 18. 1,4 Dichlorobenzene ( p- 5.0 ug/ L / Me#8260C/ ML 5ug/L DCB) 18a. Total dichlorobenzene 763 ugfl- NH only/Me#8260C/ ML 5ug/L 19. 1,1 Dichloroethane (DCA) 70 ug/L /Me#8260C/ ML 5ug/L 20. 11 2 Dichloroethane (DCA) 5.0 ug/L /Me#8260C/ ML 5ugjl 21. 1,1 Dichloroethene (DCEJ 3.2 U_9/L/Me#8260C/ ML 5ug/l 22. cis-1,2 Dichloroethene 70 ug/L/Me#8260C/ ML 5ug/ L (DCE) 23. Methylene Chloride 4.6 ug/L/Me#8260C/ ML 5ug/L 24. Tetrachloroethene (PCEl 5.0 u_g_/L/Me#8260C/ ML 5ug/L 25. 1,1, 1 Trich loro-ethane 200 ug/L/Me#8260C/ ML 5ug/L (TCA) 26. 1,1,2 Trichloro-ethane 5.0 ug/L /Me#8260C/ ML 5ug/L (TCA) 27. Trichloroethene (TCE) 5.0 ug/L /Me#8260C/ ML 5ug/L 28. Vinyl Chloride 2.0 ug/ L /Me# 8260C/ ML 5ug/ L (Chloroethene) 29. Acetone Monitor Only(ug/L)/Me#8260C/ML 50ug/L 30. 1,4 Dioxane Monitor Only /Me#1624C/ML 50ug/L 300 ug/L Me# 420.1&420.2/ML 2 ug/Lj 31. Tot al Phenols Me# 420.4 /ML SOug/L 1.0 ug/L /Me# 8270D/ML 5ug/L,Me#604 32. Pentachlorophenol (PCP) &625/ML 10ug/L 33. Total Phthalates 3.0 ug/L ** /Me# 8270D/ML 5ug/L, (Phthalate esters) 6 Me#606/ML 10ug/L& Me#625/ML 5ug/L 34. Bis (2-Ethylhexyl) 6.0 ug/L / Me#8270D/ML Phthalate [Di­ (ethylhexyl) 5ug/L,Me# 606/ML 10ug/L & Me#625/ML Phthalate] 5ug/L 35. Total Group I Polycyclic 10.0 ug/L Aromatic Hydrocarbons (PAH) 0.0038 ug/L /Me# 8270D/ ML Sug/L, a. Benzo(a) Anthracene 7 Me#610/ML 5ug/L& Me#625/ML 5ug/L 4 Effluent LimitlMethod#LML (AI.I Effl ue~t Limits are shown as Daily Parameter Max1mum L1mit, unless denoted by a ** in that case it w ill be a Monthly Averag~ Limit) 0.0038 ug/L /Me#8270D/ ML Sug/L b. Benzo(a) Pyrene 7 Me# 610/ML Sua/L& Me#625/ML Su~/L 0.0038 ug/L /Me#8270D/ ML Sug/L c. Benzo(b)Fiuoranthene 7 Me#610/ML Sua/l& Me#625/ML Su~/L 0.0038 ug/L /Me#8270D/ ML Sug/L, d. Benzo(k)Fiuoranthene 7 Me#610/ML Sug/L& Me#625/ML Sug/L 0.0038 ug/L /Me#8270D/ML Sug/L, e. Chrysene 7 Me#610/Ml Sug/L& Me#625/ML Suq/L 0.0038 ug/L /Me#8270D/ML Sug/ L, f . Dibenzo(a,h)anthracene 7 Me#610/ML Suq/L& Me#625/ML Suo/L 0.0038 ug/L /Me #8270D/ML Sug/L, g. Indeno(1,2,3-cd) Pyrene 7 Me#610/ML Suq/L& Me#625/MLSua/L 36. Total Group II Polycyclic 100 ug/L Aromatic Hydrocarbons (PAH) X/Me#8270D/ML Sug/L,Me#610/ML h. Acenaphthene Sug/L & Me#625/ML Sug/L X/Me#8270D/ML Sug/L,Me# 610/ML i. Acenaphthylene Suo/L & Me#625/ ML Sua/L X/Me#8270D/ML Sug/ L,Me#610/ML j. Anthracene Sug/L & Me#625/ML Sua/L X/Me#8270D/ML Sug/L,Me#610/ML k. Benzo(ghi) Perylene Sug/L & Me#625/ML Sug/L X/Me#8270D/ML Sug/L,Me#610/ML I. Fluoranthene Sua/L & Me#625/ML Sug/L X/Me#8270D/ML Sug/L,Me#610/ML m. Fluorene Sua/L & Me#625/ML Suq/L 20 ug/1 I Me#8270/ML Sug/L, Me#610/ML n. Naphthalene s Sug/L & Me#625/ML Suq/L X/Me#8270D/ML Sug/L,Me#610/ML o.