1212 GRAND AVE 2016-01-01 MF Import

March 31, 2008 Mr. Paul Tessier L&A Job No. 8A027 Page 4 undisturbed state can provide good foundation support with little settlement expected for lighl to moderate residential structures. Soil Conditions We werc the gcotechnical engineer of rccord for a new duplex building project rccently constructed on the Refcrence Site, about a block south of the site of the to be renovated subject residence. We provided geotechnical enginecring and construction inspection services, and vcrified footing bearing soils and evaluate cut bank stability of footprint excavation for the Referencc Project. '1'he building footprint on the Refercnce Site was cut down to about 7 feet. The soil conditions exposed on the cut banks werc composed of 10 to 12 inches of dark-brown, loose, organic topsoil, underlain by 3 to 4 feet of light-brown, dense, fine to medium sand with a trace of gravcl. This sand laycr was underlain by a deposit of'gray, hard, fine sandy silt. A ste,�el 'I'-bar manually pushed into footing bearing soils at bottom of excavation could penetrate no more than an inch. 'Che cut banks of thc building footprint excavation had stooci very stable wilhout any signs of raveling or sloughing. We expect the soil conditions at the subject project site to be similar to those at the Rcference Site. Groundwater Conditiuns A very minor trickle of groundwater scepage (Icss than 0.25 gpm)out of the cut was observed on Scptcmber 5, 2007, at the southcast comer of the building footprint excavation on the Reference Site. This sceping groundwatcr was perching on top of the underlying fine sandy silt deposit which was of extremcly low pernicability. Wc cxpcct thc groundwatcr conditions at thc subjcct projcct sitc to be similar to thosc at the Refcrcnce Site. "I'he ncar-suri'ace perched groundwater would �uctuate seasonally, dcpending on LIU & ASSOCIATES, INC. ��i ;