TABLE OF CONTENTS 



Page Number 



CHAPTER 1 - INTRODUCTION 1 



1 . 1 Background 1 



1.2 Project Need 1 



1 . 3 Proj ect Management 4 



CHAPTER 2 - CCAMP STUDY AREA: TOWNS OF BARNSTABLE AND EASTHAM 6 



2 . 1 Background 6 



2 . 2 Groundwater Protection Issues 6 



2.2.1 Barnstable 6 



2.2.2 Eas tham 7 



2 . 3 Hydrogeology 7 



2.4 Groundwater Problems Facing Cape Cod: A General Overview 12 



2 . 5 Sources of Contamination 12 



2.5.1 Sanitary Landfills 12 



2.5.2 Underground Storage Tanks 13 



2.5.3 Waste-Water Treatment Plants 13 



2.5.4 Septage Pits and Lagoons 13 



2.5.5 On-Site Wastewater Disposal 14 



2.5.6 Fertilizer Use . . . . 14 



2.5.7 Pesticides 14 



2.5.8 Toxic and Hazardous Materials 15 



2.5.9 Road Salt 15 



CHAPTER 3 - THE RESOURCE -BASED APPROACH 16 



CHAPTER 4 - THE TECHNICAL BASIS FOR GROUNDWATER PROTECTION 19 



4.1 Introduction 19 



4.2 Aquifer Assessment Committee Findings 19 



4 . 2 Characterization of the Resource 20 



4.2.1 Water-Table Mapping 20 



4.2.2 Observation-Well Inventory 20 



4.3. CCAMP Recommendations for Observation-Well Inventory 21 



4.4 DRASTIC Analysis of Aquifer Vulnerability 23 



4.5 Identification of Zone II, the Wellhead Protection Area 23 



4.6 Approaches to Zone II Determinations in the Project Area 23 



4.7 Initiation of the Comprehensive Numerical Modeling Project 26 



4.8 Documentation of Modeling 26 



4.9 Groundwater Protection for Communities on Private Wells 27 



4.9.1 Private -Well Recommendations 27 



4.9.2 Protection of Future Public-Supply-Well Resources 28 



4 . 10 Protection of the Resource 29 



4.10.1 Nitrate Loading in Municipal Wellhead Protection Areas 29 



4. 10. 2. Guide to Contamination Sources for Wellhead Protection 



for Public -Supply Wells 30 



