|
_ J4 ffcr
<br /> t-,
<br /> a iONi PROBLEM ASSMMENT REPORT
<br /> 1<
<br /> I k Shell Serio,_Station
<br /> 7910 Lower Sacramento Road,Stockton,Califaraia
<br /> Shell WIC Na 204-75244808
<br /> Delta project Na 40.88-147
<br /> C
<br /> P!--3c 5 8
<br /> .lz''• I ,
<br /> identified as SPIa and SPIb to SP5a and SP5b. A summary of the chemical results and Iaboratory data
<br /> Y;.
<br /> s'teets are presented in Appendix D. The chemical analysis(if the soil samples collected for the above-listed
<br /> a k
<br /> .: petroleum constituents detected the presence of gasoline and motor oil. Concentrations of TPH as motor
<br /> oil ranged from <10.0 to 103.0 ppm,and for gasoline from <3U.0 to 92.0 ppm. , !'
<br /> r
<br /> h` Ipa TABLE 2
<br /> Chemical Analysis of Soil Samples From
<br /> x�t Bottom of
<br /> t fT:eft t`r F Old;Task Excavation dfi^$COnCentratiOnS in millitr 3-4g
<br /> r of
<br /> t Mrlif� �< fir Ethyl-Sample Date ApproximateBenbenzene T tuene ylneect De.th(feet)
<br /> i
<br /> ` r ,
<br /> T_1 17!+0/8815 <0.001 0.001 <0.001 <0.001 <10.0 .1:1 <005 t
<br /> ^ 15 <0.00t <0.001 <0.001 <0.00 <100!"^ <0.06 ,
<br /> T-2_ 17110188.
<br /> 77
<br /> 15 <0.001 <0.001. <0.001 <O.00I �.. <100 ; 00.05. +t x
<br /> M1 �.
<br /> T-3 17f4=
<br /> y _ T-4 I217AB8 15 <0.001 ;<0,001 <0.0(11 <O.00I �.i <100'xg, <0.05'3
<br /> 1?llAl$8 15 3.0 29.6 ,22.4 188 0 ;, 4,880 0a�: 0.13 by , ,;
<br /> v ' T- I2n0/38 15 2.77 33.9 32.1 187 0 4790.0ax,y. `�= `1246
<br /> ,r'a <0.05
<br /> r" InIt�� T-7 12IL 8 15 C0.050 10.4 1.7 745 t 1SOOQg�
<br /> { ' 1 "vr k 'T-8 12120188 15 <0,005 0.095 0.130 0.470 r ITA 0b' ar .<0.05 h t
<br /> if "..
<br /> Sall r x 5
<br /> ®Identified as gasoL•ne. ya�'dL
<br /> 7>afi a'♦ '.ryy 11.r S_.t '.
<br /> �r a ?P
<br /> On January 7, 1939,after removal of the fuel dispensers,soil samples were collected.fkatn 2 feet below the »�:
<br /> M,aA ` 3 surfac a of the pump i lands. One soil sample was collected for each pump islaad,and the samples were
<br /> identified as T 1,T-2, and T-3. The locations of the Sampling points arc illustrated to 1=igtue 2 'These
<br /> sr *, '
<br /> samples were submitted for chemical analysis of BTEX,TFH,EDB.and TEL The laboratory analytical � �, �
<br /> results are presented in Table 3. Concentrations of,TPH in soil samples T-I,T-2,and T-3 were 15 0 24.0, r ,
<br /> end 1,510.0 ppm.resnectively. 4 z,
<br /> On January 25, 189, foilow;og removal of the product lines,six sail samples were collected from 2 feet
<br /> below the bottom of the product li�ie trenches One soil sample was collected for every ZO fe hof product
<br /> `. n
<br /> line trench, and the samples were identified as.PL
<br /> through PL-9. The sampling po�a�ilocati01 are
<br /> '� =«✓M+� �" < i�•�.,�t• 254N:�+'��irti-�,-,rm,.�,w.t+5v;:....----'-'.:.::�,rrr:::.;.t��.'�}',�,q,,,;55•n.+�y's`'�re �,. "'x�-3 iysy
<br /> ,rya r ,"Ts. �'y✓�,
<br /> L t �'} Y w s+� _ i�Ea
<br /> .�'•.i 3y��Yv In } 4��,� dr B�✓ `"r 4!. :r' r" t. s t,F Fes.
<br /> {
<br />
|