PHASE II : PROPOSED MITIGATION PLAN RECOMMENDATIONS

PROPERTY OF :

Mark E. DeAngelis et al

354 Old Whitfield Road

Guilford, CT

Project No.: 43520

Date: 6/8/2007

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SITE SUMMARY

Owner : Mark E. DeAngelis

Site : 354 Old Whitfield Street Guilford, CT

Parcel ID : 029016B

List No. : 9509A / 9509

Total ac. : 3 ac.

Altered Area : ¾ ac. of UPL and wetlands

PROJECT BACKGROUND

To provide recommendations to the town of Guilford for the proposed wetland mitigation

plan of the project site. Summation of past site land use found in historical city directories

for the town of Guilford, available for review at the Connecticut State Library in

Hartford, Connecticut, listed the Site as early as 1967 operating as the Arnold Foundry

Company. The Site use was for the production of non ferrous metal alloy castings,

aluminum and bronze, with a manifest of solid waste at 20-tons of sand per year. Files

found at the CT DEP indicate in 1980 apparent business closure and remnant debris of

castings, sand, slag and machine parts remained at the Site.

Mark E. DeAngelis appears to have acquired the property around 1988 where the primary

Site use is masonry and construction related. In 2005 an “After the Fact ” Regulated

Activity application was filed, and approved from the Guilford Inland Wetlands

Commission, for the request to place fill in buffer and on-site dumpsters.

In April of 2006 a local neighborhood coalition: Committee to Save Guilford Shoreline,

Inc. filed an application to intervene pursuant under Conn. Gen. Stat. § 22a-19, the

Connecticut Environmental Protection Act (CEPA).

It is the understanding of GZA that the Applicant has engaged with a certified

Wetland/Soil scientist, Michael S. Klein, and has provided a conceptual mitigation plan

for the Site. It is in accordance with the objectives and goals provided by the client, the

Town of Guilford, that GZA review all referenced applications and file materials and

make recommendations where deemed necessary to supplement the existing Phase II

Wetland Mitigation Plan and Existing Conditions Site Plan.

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RECOMMENDATIONS

Soil/Wetland Scientist – Michael S. Klein

o Area of concern is at an upper most range of tidal influence, freshwater

wetland species recommended for remediation

o Area of concern: South – Maximum depth to groundwater observed: 1.3’

Typical of wetland conditions. Regrading is not required within southern

restoration area

o Area of concern: North – Maximum depth to groundwater observed: 2.4’

Regrading required within northern restoration area to obtain wetland

conditions

o Create a secondary treatment area to establish a buffer between onsite

invasive plant species, Phragmites australis, and the restoration area

o Establish a multi-step restoration process using chemical control, glyphosate

(Rodeo), and mechanical control as well as salt-tolerant shrubs to shade out

invasive plant species

o A 5-year monitoring and maintenance schedule

CONCLUSIONS

Graphically illustrate through cross-sections existing groundwater

elevation depths with existing contour elevations

Develop a specified 5-year maintenance plan with scheduled timeline

of related remedial activity and applications of process

RECOMMENDATIONS

Original Site Conditions

o Site area established within 100-year flood zone; determine original base

flood elevations

o Delineate site specific tidal flood zone, calculate total area

o Evaluate the area of concern:

Is it a part of a flood storage area?

Is it a part of a ground water recharge system?

What is ground water elevation at full saturation?

o Delineate freshwater wetland areas, calculate total area

CONCLUSIONS

Graphically illustrate through delineated mapping and corresponding

tables the topic information listed above in Original Site Condition

Recommendations

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RECOMMEDATIONS

Past Land Use History

o Address the concerns of the citizen action group: Committee to Save Guilford

Sound (CSGS) as stated in their application to intervene May 26, 2006 that :

“debris removal which is reasonably likely to contain hazardous materials

with no real plan to insure proper handling of those materials on or off the

site…” [ Section C, 3, point A]

o [Section C, 3, point D] “ Existing piles of soils of undisclosed origin and

unknown composition, along with heretofore mentioned likely contaminated

fill, trash and equipment are presently unprotected from flood waters and thus

pose and unreasonable risk of release into inland and coastal waters”.

CONCLUSIONS

In good faith and restoration of public trust address concerns as listed

in the cease and desist order issued by the intervene party, CSGS, not

mentioned in the recommendations and conclusions provided

RECOMMENDATIONS

Current Land Use

o Establish baseline elevations

o Conduct soil testing to determine extent and type of fill currently on site

premises

o Define the extent of debris containing fill placed into areas delineated as

wetlands

o Provide a site assessment of existing wetland functions and values present on

the site

o Conduct observations of existing surface water flow preventing minimal

disturbance to neighboring residential properties.

CONCLUSIONS

Include site-wide topography at 2’ contour intervals with spot

elevations to indicate areas of low depression or high elevation points

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RECOMMENDATIONS

Proposed Site Remediation

o Provide a site plan with existing and proposed contours demonstrating

regrading restoration

o Provide a planting schedule indicating: the species name, common name,

planting quantity for specified planting area

o Save any original native material encountered

o Provide site plans indicating existing and proposed drainage features, i.e. west

side of parcel adjacent to residential properties

o Comply with established E&S control plans per Phase II Wetland Mitigation

Plan

o Apply BMP where deemed necessary by certified specialists, i.e. soil

management plan, dewatering, stormwater management, etc.

o Comply with the removal of debris per “After the Fact” application request &

approval

CONCLUSIONS

Provide supplemental material, as recommended above, consistent

with Items A through G of the Inland Wetlands and Watercourses

regulation under Section 271-23 in preparation of the Phase II Wetland

Mitigation Plan

Provide a program statement of wetland conservation and use to

mitigate future adverse impacts of the site

RECOMMENDATIONS

Monitoring Goals & Maintenance

o Develop a specified 5-year maintenance plan with scheduled timeline of

related remedial activity and applications of process as listed by Michael S.

Klein, April 13, 2007

o Continue soil, surface, ground and subsurface water testing per

recommendations of certified scientists

o Additional Wetland Nurseries as recommended by the U.S. Fish & Wildlife

Service – National Wetland Inventory :

New England Environmental Services

Blackledge River Nursery

155 Jerry Drive Road

Marlborough, CT 06477