721 E MARINE VIEW DR 2016-01-01 MF Import

5.3 SL'RFACE SOIL SAMPLFS Surface soil sampies wene collectad from the"sand cap" meterial on the nodh pamzl of the Site and from ^ sandy sediment dredgod from the Sno6omish River stockpiled at Langus Park. 5.3.1 Sand Cao Material The "sand cap" materiel does oot appear to be uoiform in depth, varying from 0.5 to 1.5 feet in depth. The "sand cap" appears to increase in depth in a geaually saulhwest to noRheast direction. The "sand cap" consists mainly of sandy sedimeat with a small percentage of silt. One surface soil sample of the "sand cap" materia! wes collected from Ihe noRh parcel and aoalyzed for heavy metals. Metals wero not detected at coocentrations which exaaded MTC,4 MUhod A clean up levels for residential soil. 5.3.2 Len�us Park Srockoiled Sediment ltvo surface soil samples wero collected from the southern end of the sediment stockpile at Langus Park and enalyzed for TPH and heavy metals. Petrolwm hydrocarbons were not detected in either sample. No metals wero detected in concentratioas which exceeded MTCA b'et6od A residential soil cleanup levels. 6.0 SUMMARY AND CONCLUSIONS T6e site of t6e proposed Northeast View Pruk is comprised of two parcels, designeted the norlh pancel and sout6 parcel. T6e south parcel was eccupied by a 6ote1 or apaRment building from the 1930's to the 1960's. Hoth the nofth and south parcels appear to have bcen vacaat since t6e 1960's. Street constcuction d�ris was repoRedly deposited on the noAh pa�cel behvcen 1980 and 199U. The construction debris was subse�uenNy "capped" with sediments dredged from the Snohomish River. As paR of Ecology's Everett Smdter site investigati�u, two surface soil samples wero collected and analyzed from the west side of the prope�ty by Science ApplicaGons Inumatiooal CocporaGon in 1991. The results indicated the presence of lead and arsenic at conxntcatioas above the MTCA Method A residentiat soil clean up levels for these compounds. These cesults suggestad the pmsence of smelter-related material on the west side of t6e Sita Field exploration of the conshvction debris oo the noAh parcel of We Site indicates that the constmction debris consists mainly of diR, asp6alt, and concrete chunks, as well as limited amounts of ot6er debris including wire, bottles, cans, brick, ceremic materiel, as6, wood, and, at one locaGon, the remains of a 55- gallon dnim, a stove and vatious automotive remnants. T6e construction debris 611 is not uniform in depth over the noiih percel of t6e Site, varying from 2 to 10 feet bgs. The estimated volume of wnshvction debris covering the nocth paccd is approximately 2,700 to 3,000 cubic yards. Surface and near-surFa�x soil sampling was conducted at the proposed Northeast View Park as paR of this assessment to evaluate the potential pmsence of conteminants t6at may be associated with construction debris . and the former Everett Smelter site a,tivities. 1'he results of the sampling identified two areas of concem that wi►I requiro romediation: the constiuction debris disposal arra and the surface/near-surface soils which appear to have baen impacte� by the former Everett Smelter. • � The subsurface soil sampling results of this construction debris disposal area indicate the presence of petroleum hydrocarboos at concentrations above the MTCA Method A residential soil clean up level becween � 8