SITE INFORMATION AND CORRESPONDENCE

Home Browse Search

TABLE 1 HISTORICAL SOIL CHEMICAL DATA PG&E French Camp General Construction Yard 401 East French Camp Road French Camp,California EPA Method 8015B EPA Method 82608 Phaseof Work Soil Boring or Depth Date TPHd TPHmo TPHg Benzene Toluene Ethylbenzene Xylenes MTBE Sample ID (feet bgs) m /k (m /k )) (m lk m /k (mg/kg) m lk m lk (m Jk HA-1-S-1.5' 1.5_ 5/23/2006_ 7.4 <25 <0.50 -0.0050 <0.0050 <0.0050 <0.0050 _<0.25 HA-1-S-3.5' 3.5 5/23/2006 17 <25 <0.50 <0.0050 <0.0050 <0.0050 <0.0050 <0.25 HA-2-S-15_ 1.5 _5/23/2006 <5.0 <25 <0.50 ,00050 <0.0050 <0.0050 <0.0050 -<0.25.- ------ - 6--- -- ------- - - HA-2-S-3' 3 5/23/2006 <5.0 <25 <0.50 <0.0050 <0.0050 <0.0050 <0.0050 <0.25 HA-3-S-1.5' 1.5 5/23/2006 <5.0 <25 <0.50 <0.0050 <0.0050 <0.0050 <0.0050 <0.25 May 2006 Soil Borings HA-3-S-3' 3 5/23/2006 <5.0 <25 <0.50 <0.0050 <0.0050 <0.0050 <0.0050 <0.25 HA-4-S-1.5' 1.5 5/23/2006 <5.0 <25 <0.50 <0.0050 <0.0050 <0.0050 <0.0050 <0.25 - - HA-4-S-3 <3 5/23/2006 6 25 <0.50 <0.0050 <0.0050 <0.0050 <0.0050 <0.25 HA-5-S-1.5' 1.;5 --5/23/2006 l;24i000 x.16 0�D0 '160 <:0:25-' <0.25 "1A _'6C3 <1.3 HA-5-S-3.5'3:5 '5/23/2008 `17,000' 73 000 ''720 <0.25 <`.0.25 '0.62 :2:1 -0.63 HA-6-S-6" 0.5 5/23/2006 22 67 <0.50 <0.0050 <0.0050 <0.0050 <0.0050 <0.25 HA-7-S-2' 2 5/23/2006 <5.0 <25 <0.50 <0.0050 <0.0050 <0.0050 <0.0050 <0.25 NW1-3 73 1211212007 -6000 -8800 .300 "<"0.99 <;0:99 40.99 <E- < <0.99 February 2007 EW1-3 '3 2/12/2007 :'12000 '3500 -600 '<"0.99 -0.91) <.D.99 < <0.99 -` Remedial Excavation TPS' -6 r.2112/2007 :2 400 "1.900 - .220 •<0.99 -.0.99. <0.99 -<: 0.99i-- TP-8' �8 / 7800 :2'800 '340 <-0. 9 <" .9 <"0.9 < -0:139 B1 �:8 4/27/2007 •<5.0. <25_ -.0.50 -<"A_O05 _-0.005 -.0.005 -<-0.005 05_ 14.5 4/27/2007 <5.0 <25 <0.50 <0.005 -0.005 _ <0.005 <0.005 <0.005 21 4/27/2007 620 540 95' <0.005 <0.005 <0.005--- <0.005 <0.005 27 4/27/2007 <5.0 <25 <0.50 <0.005 <0.005 <0.005 <0.005 <0.005 B2 _8 X413012007 _:270 -6,6, , 00 ' 30• _<OA05 -0.0005 -0.005 <;OA05 -0:005. - 154/30/2007 400 2,700 1,100' '0005 <0.005 <0.005 <0.005 <0.005 20 4/30/2007__320 4,000 2,000' <0.005 <0.005 _ <0.005 _<0.005 <0.005 April 2007 Additional 25 4/30/2007 10* <25 <0.50 <0.005 <0.005 <0.005 <0.005 <0.005 Investigation 27 4/30/2007 12' <25 <0.50 <0.005 <0.005 <0.005 <0.005 <0.005 63 10 4/30/2007 <5.0 <25 <0.50 <0.005 <0.005 <0.005 <0.005 <0.005 25 4/30/2007--<-5 0 ----c-25 <0.50 <0.005 --Z0.005 <0.005 <0.005 <0.005 B4 10 4130/2007 5.3' <25 <0.50 <0.005 <0.005 <0.005 <0.005 <0.005 20 4/30/2007 8.2' <25 <0.50 <0.005 <0.005 <0.005 <0.005 <0.005 25 4/30/2007 6.7' <25 <0.50 <0.005 <0.005 <0-005 <O.005 <0.005 B5 5 4/30/2007 <5.0 <25 <0.50 <0.005 10005 <0.005 <0.005 <0.005 10 4/30/2007 <5.0 <25 <0.50 <0.005 <0.005 <0.005 <0.005 -0.005 25 4/3012007 <5.0 <25 <0.50 <0.005 <0.005 <0.005 <0.005 <0.005 MW-1 34 5/112007 <5.0 <25 <0.50 <0.005 <0.005 <0.005 <0.005 May 2007 Monitoring MW-2 10 5/1/2007 <5.0 <25 <0.50 <0.005 <0.005 <0.005 <0.005 <0.005 Well Installation 25 5/1/2007 9.5' -25 <0.50 <0.005 <0.005 <0.005 <0.005 <0.005 MW-3 10 5/1/2007 6.2' _ <25 <0.50 <0.005 c 0.005 -0.005 <0.005 <0.005 25----5-/1/2007 6.5' <25 <0.50 <0.005 <0.005 <0.005 <0.005 <OA05 SB-5 6 :716/2009 77 _ 70 -<0:50 - - SB-5 8 :7/6/2009 -3,200__ 420 _300- - __ 1 - - SB-5 SB-5B 13 3/3/2010 3,400 1,200'- 2,400' <0.5 0.5 <0.5v <0.5 SB-5 16 7/6/2009 6,500 570 2,300• _ as SB-5B 21 3/3/2010 _5,900_ 2,000' 680' <0.005 0.005 0.0069 <0.005 SB-5B 23.5 3/3/2010 49 <25 6.8' - SB-58 25 3/3/2010 8.6 <25 <0.50 - - SB-58 - 28 3/2010 <5.0 <25 <0.50 - SB-6 _t77/6/2009 009 <5.0 <25 <0.50 SB-6 009 <5.0 <25 <0.50 SBS 009 <5.D <25 <0.50 - - - SB-7 _ : 2009 610 _:220 2,800 _ - July 2009 and March SB-7 2009 '31 <25 <0.502010 Delineation SB-7B 2010' .251000 8 600 960• 5:0 <5.0 <5 0 �5.0,SB-7 009 3,000 290 940 -- -SB-7B 010 1,600 500' 600' 15.0 <5.0 <5.0 <5.0 SB-7B 20 3/3/2010 440 _ 150 100" _ SB-7B 26 3/3/2010 <5.0 <25 <_0.50 _ SB-7B 31 3/3/2010 <5.0 1 <25 <0.50 - -- -- _SB-8 8 7/6/200914;000 22,0p0 - SB-8B 15 3/3/2010 <5.0 <25 <0.50 - _ -- -- SB-8 18 _ 7/6/2009 6,100 _ 570 1,400 SB-8B 20 3!3/2010 <5.0 <25 <0.50 - SB-88 25 3!3/2010 <5.0 c 25 <0.50 -- - -- -__ 1,. -31-3126 - - -- - SB-8B 28 10 <5.0 <25 <0.50 - -- -- -- -- SB-BB 30 3!3/2010 <5.0 !25 Table Notes: Shaded cells represent sample locations that were removed during September 2010 remedial excavation. Soil samples collected in April&May 2007 were processed using silica gel cleanup prior to being analyzed for TPHd and TPHmo Concentrations detected above method reporting limits are shown in bold < Indicates compound not detectetl at or above the specified method reporting limit • Indicates the sample chromatographic pattern for the TPH constituent does not match the laboratory standard. Abbreviations: mg/kg Milligrams per kilogram TPHg Total petroleum hydrocarbons as gasoline(carbon chain range Cs-C,,) TPHd Total petroleum hydrocarbons as diesel(carbon chain range C,o-Czo) TPHmo Total petroleum hydrocarbons as motor oil(carbon chain range Ca,-Cx) MTBE Methyi ten-butyl ether bgs Below ground surface I rencr.Camr.Clo:,urc-kp; ;abies.>:isx/T;-So,:Da--2007 202C i o('. 12/17/20;0