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

Test Pits 3B and 3C Test Pits 3B and 3C wero located dirocUy noith and east, resp�tivety, of Tac• Pit 3. Construction debris was encouoterod between 1 and 6 feet bge in Tat Pit 3B and betwooa 0.5 and 5 fcet bgs in Test Pit 3C. Brick and wood wero obsei.�,��o��p��oog��o�er construction debris, Petmleum hydrocarbons — and VOCs wero not detected in samples a�l�xted {ram either test pit. 5.1.4 Test Pit 4 ^ Test Pit 4 was located et the western end of the north pa�sxL Construction debris was eacountered between 0.5 end 2 feet bgs. 1Le sample copected at four feet bgs consisted of native soils. Petroleum _ hYd��ns were not detecced in dther sample collxted from this test pit. lusenic was detecte�i in the sample collectal at 2 fret bgs at a concentcation of 23 ppm. 5.2 HANp.AUQER BORWOS Six hand-auger borings and one dupGcate hand auger boring were complded at the Site, afl in native soils. Samples collected fi+om the hand-auger boringe we�+e composited from discrete semples collceted et 1, 2 and 3 fat bgs. Based oa subsurface samp�e copection, naGve soils appear to be unifurm over the site. T'he soils are a dedc reddish-brown, siity send to a depth of approximately 1 foot bgs. At 16is depth, the soils appeared a lightw brown, silty sand. ^ 5.2.1 }�d-Au¢er Borin � � � �d � Hand-auger boriags one, two and thcix(Hp.l� gq_2 and Hq3)wero areal(y distributod over mtive soil on the south percel (see Figuro 2), A fidd dupGcete hand auger boring, Hp-3X, was also corop�eted, Composite samples collected from these borings weoe analyzed for 6eavy metals. Heavy metals wece not ddected ac concenhations :v6ich exceeded M'('CA Method A cleanup levds in samples collected from HA-1 or HA-2. Arsenic, cadmium and lead wero detxted in t1�e sample collected from HA-3 at concentrations of 81+ 2•Z and 889 ppm, respectively. This locadon is east of the provious sample (S-53) collected during the ��oSy Pre-nmedial site essessment. '1Le MTCA cleanup levels for these mUals are ?A ppm for arsenic, _. 2 ppm for cadmium and 250 ppm for lead. Acsenic and Iead were elso detected in a duplicau sample �o��acted from HA-3 at wncentrallons of 68 and 1,130 ppm, respectively. Cadmium was not detected in t6e - duplicste sample (at a detection limit of 1.7 ppm). 5.2.2 Haod-Au¢er Bnrinoc a S n..a � Hand-auger borings four, five and six (HA-4, Iiq_5 and Hp-6) were located in native soils at the tce of the consWction debris fill slope on the nonh pance�, Composite samples collected fi,om these borings were enelyzed for petmleum 6ydrocaibons and heavy metels. Petroleum hydrocarbons in the Leavy oil iange wero identified in the samples collected from HA-5 and HA-6, however, upon further analysis, these compounds were not quantifiable above t6e detection limit of 50 ppm. The cleanup level for these compounds is 200 _ PPm. Araenic, cadmium and lead wero detected in the samples collected from all three 6and-augers at concentcatlons ranging from 273 W �OS ppm for arsenic, 2.7 to 9.4 ppm for cadmium and 470 to 1,910 ppm for lead, '!'hese cooceohations all oxceeded M'I'CA cleanup levels. 7