1600 MADISON ST 2016-01-01 MF Import

.! J � J 6.0 RESIJLTS Petroleum hydrocarbon-like odocs and PID readings were detscted in two of the seven borings drilled (V W-2 and SB�) at the site. Strong gasr�line-like odocs and high PII3 readings were detected in VW-2 while very siight odors were detected in SB-4. Petmleum-hydrc�catbon-like odo�s were not noted in any of the snil samples collccted frorn borings B-1, B-2, B-3, VW-1 and SB-S. Iaboratory results indicate that TPH as gasoline is present in soil samples collected from borinp,s V W-2 and SB-4. Soil sample VW-2 at 15-1b.4' was the o�ly sampk with TPH az gasoline at concentrations above Model Trndcs Control Act Aeaaup Regulation (MTCA) cleanup leveL �'I'able 1). All other soil samples analyzed indicate TPH as gasoline well below the MTCA cleanup level for soik or not detected. Based on the 6eld and laboratory data collected du�wg this phase of work, it appears t6at TPH az gasoline u pceaent in soil surroend �g the focmer location of the removed UST. Strategic positioning of aoil borings and laboratory analysis of soil,samples has delineated a concentration of TPH as gasoline above MTCA cleanup levels in a southeasterly dim,ction away from the former UST location. The lateral extent of detected TPH az gasoline appears to a: app�rnrimately 35 feet to the southeast; however, TPH as gasoline in soil above the MTCA cleanup level nf xt7U �pm i� beGevai to be much less than 35 feet and cios�r to appro�dmately 10 feeL This data sugg�sts 3haY Qetrokum-affected soil above the TiTf'..A cleanup level is present on the adjacent property south ni Eire Station #5. Laboratory data iadicates that the vertical actent of petmleum-affected soil is appro�daatsiy 25 i'eet below grade at the former UST locatioa It is alco beGeved that petrokum-affected soil is present below the southwestern corner of the fire atation. The impact of TPH on so�7s south of the 6ri; stadon property line appeacs to be limited to less t6an 10 fcet Remediation of impacted soil utiliang one or a combination of numerous techniques, such as vapor extraction, bioremediation, or ovcr-eaca•✓ation is possble. Consideration to future building or demolition plan should be reviewed prior to deterraining the most appropriate remedial measure. rusoo�.neu� .W�u �»� 6-1