DRAFT Technical Memorandum Northeast Region Bacteria Source Tracking 2008 Results DWM Control Number: CN 326.5 Prepared By: Jenny Birnbaum Katie Zink March 2009 Commonwealth of Massachusetts Executive Office of Environmental Affairs Ian A. Bowles, Secretary Massachusetts Department Of Environmental Protection Laurie Burt, Commissioner Bureau of Resource Protection Glenn Haas, Acting Assistant Commissioner Division of Watershed Management Glenn Haas, Director Table of Contents EXECUTIVE SUMMARY ...................................................................................................................................................6 ACKNOWLEDGEMENTS...................................................................................................................................................8 1.0 INTRODUCTION.........................................................................................................................................................9 2.0 METHODS ...............................................................................................................................................................11 3.0 Site Descriptions, Results, and Significant Findings.............................................................................................12 3.1 Boston Harbor - Mystic.......................................................................................................................... 12 Ell Pond (Melrose)................................................................................................................ 12 Sub-watershed Description ............................................................................................... 12 Results............................................................................................................................... 13 Significant Findings.......................................................................................................... 13 Horn Pond Brook (Winchester/Woburn).............................................................................. 14 Sub-watershed Description ............................................................................................... 14 Results............................................................................................................................... 15 Significant Findings.......................................................................................................... 16 Mystic River and Alewife Brook pipes (Somerville/Arlington), Junction Brook (Belmont) and Constitution Beach pipe (Boston) .................................................................................. 16 Sub-watershed Description ............................................................................................... 16 Results............................................................................................................................... 17 Significant Findings.......................................................................................................... 18 3.2 Boston Harbor - Neponset .................................................................................................................... 18 Unquity Brook and Pine Tree Brook (Milton)...................................................................... 18 Sub-watershed Description ............................................................................................... 19 Results............................................................................................................................... 19 Significant Findings.......................................................................................................... 20 Tenean Beach (Boston)......................................................................................................... 20 Sub-watershed Description ............................................................................................... 20 Results............................................................................................................................... 21 Significant Findings.......................................................................................................... 21 3.3 Boston Harbor – Weymouth & Weir...................................................................................................... 21 Wollaston Beach (Quincy).................................................................................................... 21 Sub-watershed Description ............................................................................................... 21 Results............................................................................................................................... 22 Significant Findings.......................................................................................................... 22 Blacks Creek and Furnace Brook (Quincy).......................................................................... 23 Sub-watershed Description ............................................................................................... 23 Results............................................................................................................................... 24 Significant Findings.......................................................................................................... 25 3.4 Charles.................................................................................................................................................. 25 Charles River (Boston) ......................................................................................................... 25 Sub-watershed Description ............................................................................................... 25 Results............................................................................................................................... 26 Significant Findings.......................................................................................................... 27 3.5 Ipswich .................................................................................................................................................. 27 Howlett Brook (Topsfield), Kimball Brook and Farley Brook (Ipswich) ............................ 27 Sub-watershed Description ............................................................................................... 27 Results............................................................................................................................... 28 2 Significant Findings.......................................................................................................... 28 3.6 Merrimack ............................................................................................................................................. 29 Forest Lake (Methuen).......................................................................................................... 29 Sub-watershed Description ............................................................................................... 29 Results............................................................................................................................... 30 Significant Findings.......................................................................................................... 30 Powwow River (Amesbury) ................................................................................................. 31 Sub-watershed Description ............................................................................................... 31 Results............................................................................................................................... 32 Significant Findings.......................................................................................................... 33 Spickett River (Lawrence) .................................................................................................... 33 Sub-watershed Description ............................................................................................... 33 Results............................................................................................................................... 35 Significant Findings.......................................................................................................... 35 3.6 North Coastal ........................................................................................................................................ 36 Frost Fish Brook (Danvers) .................................................................................................. 36 Sub-watershed Description ............................................................................................... 36 Results............................................................................................................................... 37 Significant Findings.......................................................................................................... 38 Stramski Beach (Marblehead)............................................................................................... 38 Sub-watershed Description ............................................................................................... 38 Results............................................................................................................................... 39 Significant