June 27 – July 1, 2011

• EPA and their contractors mobilized to the Capen Street neighborhood .   Since the residential properties were unique regarding access and egress points, amount of soil to be excavated, and present  landscaping, different types of equipment including two loaders, a mini-excavator, and a skid steer were brought on site to be used on each property in the most efficient manner possible;
• A support zone was constructed at the end of the street on MA DCR owned property.  Process gravel was used to grade the area after contaminated soil was removed by MA DCR and their contractor(s).  At that time, EPA agreed to restore this area upon completion ;
• Two staging areas for contaminated soil were constructed in a wooded area on MA DCR property so the arsenic and lead contaminated soils could be segregated for the greatest efficiency related to transportation and disposal costs;  
• A arborist was brought to the site to identify trees, bushes, and plantings on individual residential properties where excavation was anticipated;
• Excavation began at 83 Capen St. (Analysis of the samples which guided all of the ensuing excavations was conducted on-site by x-ray fluorescence.  A minimum of  10% of field samples are being sent to the EPA New England Regional Laboratory in Chelmsford,MA);

        July 5-8, 2011

• The excavation at 83 Capen St was completed;
• Preparatory work and excavations at 33, 39, 69, and 79 Capen St began and were completed.  With the permission of the 39 Capen St homeowner, access to 33 Capen St was through the yard of 39 Capen St;

July 11-15, 2011

• Preparatory work and the excavation and completion at one of two pre-identified areas at 112 Capen St was completed.  This excavation led to stone wall border between 112 and 102 Capen St.  EPA began pursuing access from the 102 Capen St homeowner to collect samples from that property and follow-up with a removal if warranted;
• Preparatory work and excavation began at 105 Capen St;

July 18-22, 2011

• The excavation at 105 Capen St continued.  Since 105 is adjacent to MA DCR property, excavation was halted in a northerly direction when imminent hazard levels were encountered in surface soils at the 105/MA DCR border.  Officials with MA DCR were informed of the situation and they continued with the excavation of contaminated soils on their property;

July 25-29, 2011

• The excavation at 105 continued.  This excavation led to the border of 105/109 Capen St in the westerly direction and was halted while EPA pursued access from the 109 Capen St homeowner; 
• Preparatory work and the excavation at 95 Capen St began and was completed.  With the permission of the 105 Capen St homeowner, access to 95 Capen St was through the yard of 105 Capen St;
• The first 10 tractor trailer loads of arsenic contaminated soil were transported off site for disposal at the Turnkey Landfill in Rochester, NH;

August 1-5, 2011

• The excavation at 105 was completed;
• After access was received from the 109 Capen St homeowner, the excavation began and was completed on this property;
• Preparatory work and the excavation at the second location at 112 Capen St began and was completed.  This excavation led onto the adjacent property at 108 Capen St.  Access from the 108 Capen St homeowner was received, the arborist visited this property to document the vegetation that would be removed, and the excavation of this property began and was completed;
• After access was received from the 102 Capen St homeowner, this property was sampled.  Results indicated levels of concern, so the excavation of this property began and was completed;
• Backfilling with loam began at 83 Capen St, began and completed at 102 Capen St, and loam was used at  108 and 112 Capen St to cover exposed roots prior to the remainder of these excavations being backfilled;

August 8-12, 2011

• Preparatory work and the excavation began and was completed at 71 and 75 Capen St;
• Backfilling began and was completed at 71, 75, and 83 Capen St.  During the backfilling of 83 Capen, the driveway was inadvertently damaged.  This was discussed with the homeowner and EPA agreed to make the necessary repairs;

August 15-19, 2011

• Backfilling began and was completed at 69, 79, 95, and 105 Capen St;
• Two tractor trailer loads of arsenic contaminated soil was transported off site for disposal;
• Access to 77 Capen St was received from the homeowner and sampling was conducted.   Arsenic and lead were detected above imminent hazard levels. The arborist was brought back onsite to inventory the vegetation as it was anticipated that much of it will be removed during the ensuing excavation;

August 22-26, 2011

• Excavation at 77 Capen St began;
• Backfilling began and was completed at 33 and 39 Capen St;
• Backfilling was completed at 108 and 112 Capen St;
• As 75 Capen St was the only property where the entire yard had been excavated and since the resident is an elderly woman who is known to regularly use the yard, the EPA On-Scene Coordinator made the decision to lay sod on top of the loam as opposed to hydroseed which the other properties were to receive;

August 29-September 2, 2011

• Excavation was completed and backfill begun and completed at 77 Capen St;
• Hydroseeding began at 69, 83, 95, an portions of 105 and 112 Capen St;
• Additional restoration activities occurred at 108 and 112 Capen St including the rebuilding of two patios and the installation of a flag pole which had been removed during the excavations;
• Loadout of contaminated soil was completed with ten tractor trailer loads of arsenic contaminated soil transported off site to Turnkey and two tractor trailer loads of lead contaminated soil transported to Greenwood Street Landfill in Worcester, MA.  The footprints of both soil staging areas were tested and found to be below any levels of concern;

September 6-9, 2011

• Continued restoration activities at 75 and 77 Capen St with the addition of river stone (along the side of the house at 75 and in a walkway through a garden at 77);
• Began and completed planting vegetation to replace plantings removed during the removal at 39, 71, 75, 105, and 112 Capen St;
• Cut out impacted driveway areas at 83 Capen St in preparation for new asphalt;
• Began to decontaminate and demobilize equipment that was no longer necessary for site operations ;
• Began to excavate portions of the gravel used in the staging area.  Under a previous agreement with the Milton Department of Public Works, this clean gravel was transported to the DPW yard at no cost; 

September 12-16, 2011

• Continued and completed moving excess gravel to the DPW yard;
• Began and completed transporting and grading a compost like fill per the MA DCR to complete the restoration of the equipment staging area;
• Completed the restoration of the asphalt driveway at 83 Capen St;
• Continued hydroseeding and completed the yards at 33, 39, 71, 77, 102, 105, 108, 109, and 112;
• Backfilled an approximate 100’ stretch of the driveway between 75 and 69/71 Capen St that had been used as the passageway to allow for the movement of contaminated soil and clean fill to and from the staging area.  MA DCR had previously removed the gravel that allowed for truck passage;
• Continued decontaminating and demobilizing equipment;    

September 19-23, 2011

• Began and completed the installation and/or repair of fencing around 75, the driveway between 75 and 69/71, 33, 39, and the area at the end of Capen St that had been used by EPA for equipment and personnel staging;
• Final hydroseeding was completed around the equipment staging area and the driveway between 75 and 69/71 Capen St;
• Final demobilization of equipment and personnel was completed.

Waste Disposition

2.1.3 Enforcement Activities, Identity of Potentially Responsible Parties (PRPs)

There have been no potentially responsible parties identified to date.