
EPA Oversight Contractor Watches Manhole Excavation Activities. |

Excavating Manhole Structures from the Big Dig Excavation Area. |

Excavating Soil from the Big Dig Excavation Area. |

Health and Safety Officer Tests the Air Near a Sewer Excavation
Area. |

Manhole Structures Within the Big Dig Excavation Area. |

Pumping and Monitoring Ground Water from a Well Before
Collecting a Ground Water Sample. |