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Pages from SL0601754315_SIR_E2C_09.22.2008Project Number 1950BK43 September 22, 2008 E2C Remediation Figures FIGURES Figure 1 Site Location Map Figure 2A Site Plan Figure 2B Site Plan with Cross-Section Transects Figure 3 SZA Groundwater Gradient Plot 8/13/08 Figure 3A SZA Groundwater Gradient Plot Figure 3AA SZA Groundwater Gradient Plot 9/9/08 Figure 3B MZA Groundwater Gradient Plot Figure 3BB MZA Groundwater Gradient Plot 9/14/08 Figure 3BC MZA Groundwater Gradient Plot 8/13/08 Figure 4 Cross-Section A-A’ Figure 4A Cross-Section A-A’ Soil PCE Figure 4B Cross-Section A-A’ Soil TCE Figure 4C Cross-Section A-A’ Soil cis-1,2-DCE Figure 5 Cross-Section B-B’ Figure 5A Cross-Section B-B’ Soil PCE Figure 5B Cross-Section B-B’ Soil TCE Figure 5C Cross-Section B-B’ Soil cis-1,2-DCE Figure 6 Cross-Section C-C’ Figure 6A Cross-Section C-C’ Soil PCE Figure 6B Cross-Section C-C’ Soil TCE Figure 6C Cross-Section C-C’ Soil cis-1,2-DCE Figure 7 Cross-Section D-C’ Figure 7A Cross-Section D-D’ Soil PCE Figure 7B Cross-Section D-D’ Soil TCE Figure 7C Cross-Section D-D’ Soil cis-1,2-DCE Figure 8A SZA PCE Isoconcentration Plot Figure 8B SZA TCE Isoconcentration Plot Figure 8C SZA cis-1,2-DCE Isoconcentration Plot Figure 9A MZA PCE Isoconcentration Plot Figure 9B MZA TCE Isoconcentration Plot Figure 9C MZA cis-1,2-DCE Isoconcentration Plot FIGURE 1Phone: (661) 831-6906 Fax: (661) 831-6234 E C Remediation2 5300 Woodmere Dr., Suite 105 Bakersfield, CA 93313 SITE SITE LOCATION MAP LAKE TAHOE LAUNDRY WORKS 1024 LAKE TAHOE BOULEVARD SOUTH LAKE TAHOE, CALIFORNIA LAKE TAHOE LAUNDRY WORKS 1024 LAKE TAHOE BOULEVARD SOUTH LAKE TAHOE, CALIFORNIA Phone: (661) 831-6906 Fax: (661) 831-6234 5300 Woodmere Dr., Suite 105 Bakersfield, CA 93313 E C Remediation2 L A K E T A H B O A R O E U L E V DLOGRENEENU AVERALEYSAUTLNDROMAAUTLNDROMA FIGURE 2ASITE PLAN 0 FT F50 T N LEGEND On-Site Dual-Zone Groundwater Monitoring Well Set Off-Site Dual-Zone Temporary Groundwater Monitoring Well Set LW-MW-1S/1D LW-MW-3S/3D MW-45M MW-38M LW-MW-3S LW--MW3D LW-MW-1S LW-MW-1D LW-MW-5S LW-MW-5D LW-MW-7S LW-MW-7D LW-MW-6S LW-MW-6D LW-MW-4S LW-MW-4D LW-MW-2S LW-MW-2D LW-MW-8S LW-MW-8D LAKE TAHOE LAUNDRY WORKS 1024 LAKE TAHOE BOULEVARD SOUTH LAKE TAHOE, CALIFORNIA Phone: (661) 831-6906 Fax: (661) 831-6234 5300 Woodmere Dr., Suite 105 Bakersfield, CA 93313 E C Remediation2 L A K E T A H B O A R O E U L E V DLOGRENEENU AVERALEYSAUTLNDROMAAUTLNDROMA FIGURE 2BSITE PLAN WITH CROSS-SECTION TRANSECTS 0 FT F50 T N LEGEND On-Site Dual-Zone Groundwater Monitoring Well Set Off-Site Dual-Zone Temporary Groundwater Monitoring Well Set LW-MW-1S/1D LW-MW-3S/3D MW-38M MW-45M LW-MW-3S LW--MW3D LW-MW-1S LW-MW-1D LW-MW-5S LW-MW-5D LW-MW-7S LW-MW-7D LW-MW-6S LW-MW-6D LW-MW-4S LW-MW-4D LW-MW-2S LW-MW-2D LW-MW-8S LW-MW-8D A A ’BB’C ’C D’ D LAKE TAHOE LAUNDRY WORKS 1024 LAKE TAHOE BOULEVARD SOUTH LAKE TAHOE, CALIFORNIA Phone: (661) 831-6906 Fax: (661) 831-6234 5300 Woodmere Dr., Suite 105 Bakersfield, CA 93313 E C Remediation2 L A K E T A H B O A R O E U L E V DLOGRENEENU AVERALEYSAUTLNDROMAAUTLNDROMA FIGURE 3AGROUNDWATER GRADIENT PLOT SHALLOW ZONE 9/9/08 0 FT F50 T N LEGEND On-Site Dual-Zone Groundwater Monitoring Well Set Off-Site Dual-Zone Temporary Groundwater Monitoring Well Set LW-MW-1S/1D LW-MW-3S/3D MW-45M MW-38M LW-MW-3S LW-MW-1S LW-MW-5S LW-MW-7S LW-MW-6S LW-MW-4S LW-MW-2S LW-MW-8S 6255.17 6253.72 6253.59 6254.57 6252.74 6254.94 6255.13 6254.41 2564 62 53 ???2565 ??????? LAKE TAHOE LAUNDRY WORKS 1024 LAKE TAHOE BOULEVARD SOUTH LAKE TAHOE, CALIFORNIA Phone: (661) 831-6906 Fax: (661) 831-6234 5300 Woodmere Dr., Suite 105 Bakersfield, CA 93313 E C Remediation2 L A K E T A H B O A R O E U L E V DLOGRENEENU AVERALEYSAUTLNDROMAAUTLNDROMA FIGURE 3AAGROUNDWATER GRADIENT PLOT SHALLOW ZONE 9/14/08 0 FT F50 T N LEGEND On-Site Dual-Zone Groundwater Monitoring Well Set Off-Site Dual-Zone Temporary Groundwater Monitoring Well Set LW-MW-1S/1D LW-MW-3S/3D MW-38M MW-45M LW-MW-3S LW-MW-1S LW-MW-5S LW-MW-7S LW-MW-6S LW-MW-4S LW-MW-2S LW-MW-8S 6255.01 6253.52 6253.36 6254.39 6252.70 6255.03 6254.73 6254.18 2564 6 2 5 3 ? 6255 ????????? LAKE TAHOE LAUNDRY WORKS 1024 LAKE TAHOE BOULEVARD SOUTH LAKE TAHOE, CALIFORNIA Phone: (661) 831-6906 Fax: (661) 831-6234 5300 Woodmere Dr., Suite 105 Bakersfield, CA 93313 E C Remediation2 L A K E T A H B O A R O E U L E V DLOGRENEENU AVERALEYSAUTLNDROMAAUTLNDROMA FIGURE 3BGROUNDWATER GRADIENT PLOT MIDDLE ZONE 9/9/08 0 FT F50 T N LEGEND On-Site Dual-Zone Groundwater Monitoring Well Set Off-Site Dual-Zone Temporary Groundwater Monitoring Well Set LW-MW-1S/1D LW-MW-3S/3D MW-45M MW-38M LW--MW3D LW-MW-1D LW-MW-5D LW-MW-7D LW-MW-6D LW-MW-4D LW-MW-2D LW-MW-8D 6248.11 6247.37 6245.59 6248.65 6245.40 6254.30 6250.79 6252.70 6246.15 6 25 06 2 4 8 6246 2625????? ??????? ELAK TA H O E B O U L E V A R DLOGRENEENU AVERALEYSAUTLNDROMAAUTLNDROMA LAKE TAHOE LAUNDRY WORKS 1024 LAKE TAHOE BOULEVARD SOUTH LAKE TAHOE, CALIFORNIA Phone: (661) 831-6906 Fax: (661) 831-6234 5300 Woodmere Dr., Suite 105 Bakersfield, CA 93313 E C Remediation2 FIGURE 3BBGROUNDWATER GRADIENT PLOT MIDDLE ZONE 9/14/08 0 FT F50 T N LEGEND On-Site Dual-Zone Groundwater Monitoring Well Set Off-Site Dual-Zone Temporary Groundwater Monitoring Well Set LW-MW-1S/1D LW-MW-3S/3D ? MW-45M MW-38M LW-MW-3D LW-MW-1D LW-MW-5D LW-MW-7D LW-MW-6D LW-MW-4D LW-MW-2D LW-MW-8D 6245.87 6247.09 6245.98 6248.34 6245.18 6254.07 6250.53 6252.49 6245.91 ? ? 6252 26 48 6246 4625?????2 5 06 ?? Phone: (661) 831-6906 Fax: (661) 831-6234 E C Remediation2 5300 Woodmere Dr., Suite 105 Bakersfield, CA 93313 CROSS SECTION A - A’ FIGURE 4 LAKE TAHOE LAUNDRY WORKS 1024 LAKE TAHOE BOULEVARD SOUTH LAKE TAHOE, CALIFORNIA ML SP/SW1SP/SW1 SP/SW3 SP/SW2 SP/SW3 SP/SW4 SP/SW2 SP/SW3 SP/SW2 SP/SW3 Horizontal Scale: 1.0-inch = 20 feet 0 20 FT Horizontal Scale Vertical Scale: 1.0-inch = 20 feet 0 20 FT Vertical Scale Legend First Encountered Shallow Water ML - Silt; light gray and orange brown with Fe-staining in places SP/SW1 - SM - Silty Sand; reddish gray; generally very fine sands; non-plastic fines SP - Poorly-Graded Sand SW - Well-Graded Sand Shallow Water Table w/date measured Alternating lenses of poorly-graded and well-graded sands; generally salt & pepper in color with occasional moderate yellow brown lenses SP/SW2 -Alternating lenses of poorly-graded and well-graded sands; generally salt & pepper lenses with interbedded moderate yellow brown and gray lenses SP/SW3 - Alternating lenses of poorly-graded and well-graded sands; salt and pepper, moderate yellow brown and gray SP/SW3 MLML AA A’A’ 00 2020 4040 EASTWEST 6060 1010 3030 5050 00 2020 4040 6060 1010 3030 5050 L W-8D/8S W-M L W-8D/8S W-M LW -6 S -MW D/6 t a e ’) (se h ad 15 LW -6 S -MW D/6 t a e ’) (se h ad 15 LW-MW-5 D/5S (s t back 10’) eLW-MW-5 D/5S (s t back 10’) e W 3 L -MW-3D/S b c 4 (set a k 5’)W 3 L -MW-3D/S b c 4 (set a k 5’)W W-/2 L -M 2D S b 5 ) (set ack 3 ’W W-/2 L -M 2D S b 5 ) (set ack 3 ’W / LW-M -1D 1 S W / LW-M -1D 1 S 8/1/08 7/29/08 8/1/08 7/24/08 7/30/08 8/4/08 7/28/08 7/11/08 7/15/08 7/17/08 ML FILLFILL FILL FILLFILLFILL ML SM ? ? ? ? ? ? ? ? ? ? ? ? ? SP/SW2 SP/SW1 SP/SW2 SP/SW1 SP/SW1 ? ? SP/SW2 SP/SW1 SP/SW3 SP/SW4 - Alternating lenses of poorly-graded and well-graded sands; interbedded lenses of gray and orange-brown with occasional Fe-staining; occasional lenses of reddish brown, very fine sand SP/SW3SP/SW3 ML ?? 9/9/08 9/9/08 (SZA)9/9/08 (SZA) 9/9/08 (SZA) 9/9/08 (SZA)9/9/08 (SZA) 9/9/08 (MZA) 9/9/08 (MZA) 9/9/08 (MZA) 9/9/08 (MZA) 9/9/08 (MZA) 9/9/08 (MZA) ?ML Phone: (661) 831-6906 Fax: (661) 831-6234 E C Remediation2 5300 Woodmere Dr., Suite 105 Bakersfield, CA 93313 CROSS SECTION A - A’ SOIL PCE FIGURE 4A LAKE TAHOE LAUNDRY WORKS 1024 LAKE TAHOE BOULEVARD SOUTH LAKE TAHOE, CALIFORNIA ML SP/SW1SP/SW1 SP/SW3 SP/SW2 SP/SW3 SP/SW4 SP/SW2 SP/SW3 SP/SW2 SP/SW3 Horizontal Scale: 1.0-inch = 20 feet 0 20 FT Horizontal Scale Vertical Scale: 1.0-inch = 20 feet 0 20 FT Vertical Scale Legend First Encountered Shallow Water ML - Silt; light gray and orange brown with Fe-staining in places SP/SW1 - SM - Silty Sand; reddish gray; generally very fine sands; non-plastic fines SP - Poorly-Graded Sand SW - Well-Graded Sand Shallow Water Table w/date measured Alternating lenses of poorly-graded and well-graded sands; generally salt & pepper in color with occasional moderate yellow brown lenses SP/SW2 -Alternating lenses of poorly-graded and well-graded sands; generally salt & pepper lenses with interbedded moderate yellow brown and gray lenses SP/SW3 - Alternating lenses of poorly-graded and well-graded sands; salt and pepper, moderate yellow brown and gray SP/SW3 MLML AA A’A’ 00 2020 4040 EASTWEST 6060 1010 3030 5050 00 2020 4040 6060 1010 3030 5050 L W-8D/8S W-M L W-8D/8S W-M LW -6 S -MW D/6 t a e ’) (se h ad 15 LW -6 S -MW D/6 t a e ’) (se h ad 15 LW-MW-5 D/5S (s t back 10’) eLW-MW-5 D/5S (s t back 10’) e W 3 L -MW-3D/S b c 4 (set a k 5’)W 3 L -MW-3D/S b c 4 (set a k 5’)W W-/2 L -M 2D S b 5 ) (set ack 3 ’W W-/2 L -M 2D S b 5 ) (set ack 3 ’W / LW-M -1D 1 S W / LW-M -1D 1 S 7/15/08 7/17/08 ML FILLFILL FILL FILLFILLFILL ML SM ? ? ? ? ? ? ? ? ? ? ? ? ? SP/SW2 SP/SW1 SP/SW2 SP/SW1 SP/SW1 ? ? SP/SW2 SP/SW1 SP/SW3 SP/SW4 - Alternating lenses of poorly-graded and well-graded sands; interbedded lenses of gray and orange-brown with occasional Fe-staining; occasional lenses of reddish brown, very fine sand SP/SW3SP/SW3 ML ?? 410 0.26 0.33 ND ND ND ND ND ND 0.33 0.12 0.14 ND ND ND ND ND ND 0.272 0.106 ND 0.057 0.375 Analytical in mg/Kg” ND = Not detected at or above the Method Detection Limit (see Table 2) ND ML? ? ? ? ? Phone: (661) 831-6906 Fax: (661) 831-6234 E C Remediation2 5300 Woodmere Dr., Suite 105 Bakersfield, CA 93313 CROSS SECTION A - A’ SOIL TCE FIGURE 4B LAKE TAHOE LAUNDRY WORKS 1024 LAKE TAHOE BOULEVARD SOUTH LAKE TAHOE, CALIFORNIA ML SP/SW1SP/SW1 SP/SW3 SP/SW2 SP/SW3 SP/SW4 SP/SW2 SP/SW3 SP/SW2 SP/SW3 Horizontal Scale: 1.0-inch = 20 feet 0 20 FT Horizontal Scale Vertical Scale: 1.0-inch = 20 feet 0 20 FT Vertical Scale Legend First Encountered Shallow Water ML - Silt; light gray and orange brown with Fe-staining in places SP/SW1 - SM - Silty Sand; reddish gray; generally very fine sands; non-plastic fines SP - Poorly-Graded Sand SW - Well-Graded Sand Shallow Water Table w/date measured Alternating lenses of poorly-graded and well-graded sands; generally salt & pepper in color with occasional moderate yellow brown lenses SP/SW2 -Alternating lenses of poorly-graded and well-graded sands; generally salt & pepper lenses with interbedded moderate yellow brown and gray lenses SP/SW3 - Alternating lenses of poorly-graded and well-graded sands; salt and pepper, moderate yellow brown and gray SP/SW3 MLML AA A’A’ 00 2020 4040 EASTWEST 6060 1010 3030 5050 00 2020 4040 6060 1010 3030 5050 L W-8D/8S W-M L W-8D/8S W-M LW -6 S -MW D/6 t a e ’) (se h ad 15 LW -6 S -MW D/6 t a e ’) (se h ad 15 LW-MW-5 D/5S (s t back 10’) eLW-MW-5 D/5S (s t back 10’) e W 3 L -MW-3D/S b c 4 (set a k 5’)W 3 L -MW-3D/S b c 4 (set a k 5’)W W-/2 L -M 2D S b 5 ) (set ack 3 ’W W-/2 L -M 2D S b 5 ) (set ack 3 ’W / LW-M -1D 1 S W / LW-M -1D 1 S ML FILLFILL FILL FILLFILLFILL ML SM ? ? ? ? ? ? ? ? ? ? ? ? ? SP/SW2 SP/SW1 SP/SW2 SP/SW1 SP/SW1 ? ? SP/SW2 SP/SW1 SP/SW3 SP/SW4 - Alternating lenses of poorly-graded and well-graded sands; interbedded lenses of gray and orange-brown with occasional Fe-staining; occasional lenses of reddish brown, very fine sand SP/SW3SP/SW3 ML ?? 17 ND ND ND ND ND ND ND ND 0.35 ND ND ND ND ND ND ND ND ND ND ND ND Analytical in mg/Kg” ND = Not detected at or above the Method Detection Limit (see Table 2) ND ND ML? Phone: (661) 831-6906 Fax: (661) 831-6234 E C Remediation2 5300 Woodmere Dr., Suite 105 Bakersfield, CA 93313 CROSS SECTION A - A’ SOIL cis-1,2-DCE FIGURE 4C LAKE TAHOE LAUNDRY WORKS 1024 LAKE TAHOE BOULEVARD SOUTH LAKE TAHOE, CALIFORNIA ML SP/SW1SP/SW1 SP/SW3 SP/SW2 SP/SW3 SP/SW4 SP/SW2 SP/SW3 SP/SW2 SP/SW3 Horizontal Scale: 1.0-inch = 20 feet 0 20 FT Horizontal Scale Vertical Scale: 1.0-inch = 20 feet 0 20 FT Vertical Scale Legend First Encountered Shallow Water ML - Silt; light gray and orange brown with Fe-staining in places SP/SW1 - SM - Silty Sand; reddish gray; generally very fine sands; non-plastic fines SP - Poorly-Graded Sand SW - Well-Graded Sand Shallow Water Table w/date measured Alternating lenses of poorly-graded and well-graded sands; generally salt & pepper in color with occasional moderate yellow brown lenses SP/SW2 -Alternating lenses of poorly-graded and well-graded sands; generally salt & pepper lenses with interbedded moderate yellow brown and gray lenses SP/SW3 - Alternating lenses of poorly-graded and well-graded sands; salt and pepper, moderate yellow brown and gray SP/SW3 MLML AA A’A’ 00 2020 4040 EASTWEST 6060 1010 3030 5050 00 2020 4040 6060 1010 3030 5050 L W-8D/8S W-M L W-8D/8S W-M LW -6 S -MW D/6 t a e ’) (se h ad 15 LW -6 S -MW D/6 t a e ’) (se h ad 15 LW-MW-5 D/5S (s t back 10’) eLW-MW-5 D/5S (s t back 10’) e W 3 L -MW-3D/S b c 4 (set a k 5’)W 3 L -MW-3D/S b c 4 (set a k 5’)W W-/2 L -M 2D S b 5 ) (set ack 3 ’W W-/2 L -M 2D S b 5 ) (set ack 3 ’W / LW-M -1D 1 S W / LW-M -1D 1 S ML FILLFILL FILL FILLFILLFILL ML SM ? ? ? ? ? ? ? ? ? ? ? ? ? SP/SW2 SP/SW1 SP/SW2 SP/SW1 SP/SW1 ? ? SP/SW2 SP/SW1 SP/SW3 SP/SW4 - Alternating lenses of poorly-graded and well-graded sands; interbedded lenses of gray and orange-brown with occasional Fe-staining; occasional lenses of reddish brown, very fine sand SP/SW3SP/SW3 ML ?? 1.2 ND ND ND ND ND ND 0.71 ND ND ND ND 0.51 ND ND ND ND ND ND ND ND ND ND Analytical in mg/Kg” ND = Not detected at or above the Method Detection Limit (see Table 2) ML? E C Remediation2 FIGURE 5Phone: (661) 831-6906 Fax: (661) 831-6234 5300 Woodmere Drive, Ste. 105 Bakersfield, California 93313 CROSS SECTION B - B’ LAKE TAHOE LAUNDRY WORKS 1024 LAKE TAHOE BOULEVARD SOUTH LAKE TAHOE, CALIFORNIA B’B’ 00 4040 6060 1010 3030 5050 ? ? 2020 Legend First Encountered Shallow Water ML - Silt; light gray and orange brown with Fe-staining in places SP/SW1 - SM - Silty Sand; reddish gray; generally very fine sands; non-plastic fines SP - Poorly-Graded Sand SW - Well-Graded Sand Shallow Water Table w/date measured Alternating lenses of poorly-graded and well-graded sands; generally salt & pepper in color with occasional moderate yellow brown lenses SP/SW2 -Alternating lenses of poorly-graded and well-graded sands; generally salt & pepper lenses with interbedded moderate yellow brown and gray lenses SP/SW3 - Alternating lenses of poorly-graded and well-graded sands; salt and pepper, moderate yellow brown and gray SP/SW4 - Alternating lenses of poorly-graded and well-graded sands; interbedded lenses of gray and orange-brown with occasional Fe-staining; occasional lenses of reddish brown, very fine sand BB 00 2020 4040 6060 1010 3030 5050 W / LW-M -1D 1SW/ LW-M -1D 1S 7/15/08 FILLFILL ML SM ? ? ? ? ? ? ?? SP/SW2 SP/SW3 SP/SW1SP/SW1 SP/SW3 SP/SW4 LW-MW-2D/2 S b 2 (set ack 1 ’) LW-MW-2D/2 S b 2 (set ack 1 ’) 7/17/08 ? SP/SW2 SP/SW3 ML LW-MW-3D/3S LW-MW-3D/3S 8/1/08 7/29/08 W-W /4 L M -4 D S (s e ah ad 7 ’ t e )W-W /4 L M -4 D S (s e ah ad 7 ’ t e )NORTHSOUTH 7/31/08 ML SP/SW3 SP/SW2SP/SW2 SP/SW2 ML ML ? ? ?? SP/SW3 SP/SW1 ML SM ? SP/SW1 SP/SW1 SP/SW3 FILL FILL ML ? ?ML E C Remediation2 FIGURE 5APhone: (661) 831-6906 Fax: (661) 831-6234 5300 Woodmere Drive, Ste. 105 Bakersfield, California 93313 CROSS SECTION B - B’ SOIL PCE LAKE TAHOE LAUNDRY WORKS 1024 LAKE TAHOE BOULEVARD SOUTH LAKE TAHOE, CALIFORNIA B’B’ 00 4040 6060 1010 3030 5050 ? ? 2020 Legend First Encountered Shallow Water ML - Silt; light gray and orange brown with Fe-staining in places SP/SW1 - SM - Silty Sand; reddish gray; generally very fine sands; non-plastic fines SP - Poorly-Graded Sand SW - Well-Graded Sand Shallow Water Table w/date measured Alternating lenses of poorly-graded and well-graded sands; generally salt & pepper in color with occasional moderate yellow brown lenses SP/SW2 -Alternating lenses of poorly-graded and well-graded sands; generally salt & pepper lenses with interbedded moderate yellow brown and gray lenses SP/SW3 - Alternating lenses of poorly-graded and well-graded sands; salt and pepper, moderate yellow brown and gray SP/SW4 - Alternating lenses of poorly-graded and well-graded sands; interbedded lenses of gray and orange-brown with occasional Fe-staining; occasional lenses of reddish brown, very fine sand BB 00 2020 4040 6060 1010 3030 5050 W / LW-M -1D 1SW/ LW-M -1D 1S FILLFILL ML SM ? ? ? ? ? ? ?? SP/SW2 SP/SW3 SP/SW1SP/SW1 SP/SW3 SP/SW4 LW-MW-2D/2 S b 2 (set ack 1 ’) LW-MW-2D/2 S b 2 (set ack 1 ’) ? SP/SW2 SP/SW3 ML LW-MW-3D/3S LW-MW-3D/3S W-W /4 L M -4 D S (s e ah ad 7 ’ t e )W-W /4 L M -4 D S (s e ah ad 7 ’ t e )NORTHSOUTH ML SP/SW3 SP/SW2SP/SW2 SP/SW2 ML ML ? ? ?? SP/SW3 SP/SW1 ML SM ? SP/SW1 SP/SW1 SP/SW3 FILL FILL ML ? ND 0.33 0.12 0.14 410 0.26 0.33 ND ND ND ND ND ND ND ND 0.713 ?ML?ML E C Remediation2 FIGURE 5BPhone: (661) 831-6906 Fax: (661) 831-6234 5300 Woodmere Drive, Ste. 105 Bakersfield, California 93313 CROSS SECTION B - B’ SOIL TCE LAKE TAHOE LAUNDRY WORKS 1024 LAKE TAHOE BOULEVARD SOUTH LAKE TAHOE, CALIFORNIA B’B’ 00 4040 6060 1010 3030 5050 ? ? 2020 Legend First Encountered Shallow Water ML - Silt; light gray and orange brown with Fe-staining in places SP/SW1 - SM - Silty Sand; reddish gray; generally very fine sands; non-plastic fines SP - Poorly-Graded Sand SW - Well-Graded Sand Shallow Water Table w/date measured Alternating lenses of poorly-graded and well-graded sands; generally salt & pepper in color with occasional moderate yellow brown lenses SP/SW2 -Alternating lenses of poorly-graded and well-graded sands; generally salt & pepper lenses with interbedded moderate yellow brown and gray lenses SP/SW3 - Alternating lenses of poorly-graded and well-graded sands; salt and pepper, moderate yellow brown and gray SP/SW4 - Alternating lenses of poorly-graded and well-graded sands; interbedded lenses of gray and orange-brown with occasional Fe-staining; occasional lenses of reddish brown, very fine sand BB 00 2020 4040 6060 1010 3030 5050 W / LW-M -1D 1SW/ LW-M -1D 1S FILLFILL ML SM ? ? ? ? ? ? ?? SP/SW2 SP/SW3 SP/SW1SP/SW1 SP/SW3 SP/SW4 LW-MW-2D/2 S b 2 (set ack 1 ’) LW-MW-2D/2 S b 2 (set ack 1 ’) ? SP/SW2 SP/SW3 ML LW-MW-3D/3S LW-MW-3D/3S W-W /4 L M -4 D S (s e ah ad 7 ’ t e )W-W /4 L M -4 D S (s e ah ad 7 ’ t e )NORTHSOUTH ML SP/SW3 SP/SW2SP/SW2 SP/SW2 ML ML ? ? ?? SP/SW3 SP/SW1 ML SM ? SP/SW1 SP/SW1 SP/SW3 FILL FILL ML ? ND 0.035 ND ND 17 ND ND ND ND ND ND ND ND ND ND ND ?ML E C Remediation2 FIGURE 5CPhone: (661) 831-6906 Fax: (661) 831-6234 5300 Woodmere Drive, Ste. 105 Bakersfield, California 93313 CROSS SECTION B - B’ SOIL cis-1,2-DCE LAKE TAHOE LAUNDRY WORKS 1024 LAKE TAHOE BOULEVARD SOUTH LAKE TAHOE, CALIFORNIA B’B’ 00 4040 6060 1010 3030 5050 ? ? 2020 Legend First Encountered Shallow Water ML - Silt; light gray and orange brown with Fe-staining in places SP/SW1 - SM - Silty Sand; reddish gray; generally very fine sands; non-plastic fines SP - Poorly-Graded Sand SW - Well-Graded Sand Shallow Water Table w/date measured Alternating lenses of poorly-graded and well-graded sands; generally salt & pepper in color with occasional moderate yellow brown lenses SP/SW2 -Alternating lenses of poorly-graded and well-graded sands; generally salt & pepper lenses with interbedded moderate yellow brown and gray lenses SP/SW3 - Alternating lenses of poorly-graded and well-graded sands; salt and pepper, moderate yellow brown and gray SP/SW4 - Alternating lenses of poorly-graded and well-graded sands; interbedded lenses of gray and orange-brown with occasional Fe-staining; occasional lenses of reddish brown, very fine sand BB 00 2020 4040 6060 1010 3030 5050 W / LW-M -1D 1SW/ LW-M -1D 1S FILLFILL ML SM ? ? ? ? ? ? ?? SP/SW2 SP/SW3 SP/SW1SP/SW1 SP/SW3 SP/SW4 LW-MW-2D/2 S b 2 (set ack 1 ’) LW-MW-2D/2 S b 2 (set ack 1 ’) ? SP/SW2 SP/SW3 ML LW-MW-3D/3S LW-MW-3D/3S W-W /4 L M -4 D S (s e ah ad 7 ’ t e )W-W /4 L M -4 D S (s e ah ad 7 ’ t e )NORTHSOUTH ML SP/SW3 SP/SW2SP/SW2 SP/SW2 ML ML ? ? ?? SP/SW3 SP/SW1 ML SM ? SP/SW1 SP/SW1 SP/SW3 FILL FILL ML ? ND ND ND ND 1.2 ND ND ND ND ND 0.71 ND ND ND ND ND ?ML Phone: (661) 831-6906 Fax: (661) 831-6234 E C Remediation2 5300 Woodmere Dr., Suite 105 Bakersfield, CA 93313 CROSS SECTION C - C’ FIGURE 6 LAKE TAHOE LAUNDRY WORKS 1024 LAKE TAHOE BOULEVARD SOUTH LAKE TAHOE, CALIFORNIA ML SP/SW3 SP/SW2 SP/SW2 SP/SW3 SP/SW3 Horizontal Scale: 1.0-inch = 20 feet 0 20 FT Horizontal Scale Vertical Scale: 1.0-inch = 20 feet 0 20 FT Vertical Scale Legend First Encountered Shallow Water ML - Silt; light gray and orange brown with Fe-staining in places SP/SW1 - SM - Silty Sand; reddish gray; generally very fine sands; non-plastic fines SP - Poorly-Graded Sand SW - Well-Graded Sand Shallow Water Table w/date measured Alternating lenses of poorly-graded and well-graded sands; generally salt & pepper in color with occasional moderate yellow brown lenses SP/SW2 -Alternating lenses of poorly-graded and well-graded sands; generally salt & pepper lenses with interbedded moderate yellow brown and gray lenses SP/SW3 - Alternating lenses of poorly-graded and well-graded sands; salt and pepper, moderate yellow brown and gray SP/SW3 MLML C’C’ 00 2020 4040 EASTWEST 6060 1010 3030 5050 00 2020 4040 6060 1010 3030 5050 LW-M W-8D/8S b (set ack 10’) LW-M W-8D/8S b (set ack 10’) LW -6 S -MW D/6 t a e ’) (se h ad 20 LW -6 S -MW D/6 t a e ’) (se h ad 20 W 5 L -MW-5D/S t e 5 (se a h ad 1 ’)W 5 L -MW-5D/S t e 5 (se a h ad 1 ’) W-MW-3 D/3S LW-MW-3 D/3S L W - L -MW 2D/2S t e (se ah ad 25 ’)W - L -MW 2D/2S t e (se ah ad 25 ’) 8/1/08 7/29/08 8/1/08 7/24/08 7/30/08 8/4/08 7/28/087/17/08 FILLFILLFILL ? ?? ?? SP/SW1 SP/SW2 SP/SW1SP/SW1 ? SP/SW4 - Alternating lenses of poorly-graded and well-graded sands; interbedded lenses of gray and orange-brown with occasional Fe-staining; occasional lenses of reddish brown, very fine sand SP/SW3 ML ? W-W /4 L M -4D S t b c k 2 ) (se a 5’W-W /4 L M -4D S t b c k 2 ) (se a 5’ 7/31/08 ML SP/SW3 SP/SW2 ML SP/SW1 SP/SW3 INTERSECT B-B’INTERSECT B-B’ INTERSECT A-A’INTERSECT A-A’ SP/SW2 SP/SW2 ML SP/SW3 ML ? ? ??? ? ? ? SP/SW1 SP/SW1 SP/SW2 ? ML? ? SP/SW1 ? FILL FILL FILLFILL ? CC Phone: (661) 831-6906 Fax: (661) 831-6234 E C Remediation2 5300 Woodmere Dr., Suite 105 Bakersfield, CA 93313 CROSS SECTION C - C’ SOIL PCE FIGURE 6A LAKE TAHOE LAUNDRY WORKS 1024 LAKE TAHOE BOULEVARD SOUTH LAKE TAHOE, CALIFORNIA ML SP/SW3 SP/SW2 SP/SW2 SP/SW3 SP/SW3 Horizontal Scale: 1.0-inch = 20 feet 0 20 FT Horizontal Scale Vertical Scale: 1.0-inch = 20 feet 0 20 FT Vertical Scale Legend First Encountered Shallow Water ML - Silt; light gray and orange brown with Fe-staining in places SP/SW1 - SM - Silty Sand; reddish gray; generally very fine sands; non-plastic fines SP - Poorly-Graded Sand SW - Well-Graded Sand Shallow Water Table w/date measured Alternating lenses of poorly-graded and well-graded sands; generally salt & pepper in color with occasional moderate yellow brown lenses SP/SW2 -Alternating lenses of poorly-graded and well-graded sands; generally salt & pepper lenses with interbedded moderate yellow brown and gray lenses SP/SW3 - Alternating lenses of poorly-graded and well-graded sands; salt and pepper, moderate yellow brown and gray SP/SW3 MLML C’C’ 00 2020 4040 EASTWEST 6060 1010 3030 5050 00 2020 4040 6060 1010 3030 5050 LW-M W-8D/8S b (set ack 10’) LW-M W-8D/8S b (set ack 10’) LW -6 S -MW D/6 t a e ’) (se h ad 20 LW -6 S -MW D/6 t a e ’) (se h ad 20 W 5 L -MW-5D/S t e 5 (se a h ad 1 ’)W 5 L -MW-5D/S t e 5 (se a h ad 1 ’) W-MW-3 D/3S LW-MW-3 D/3S L W - L -MW 2D/2S t e (se ah ad 25 ’)W - L -MW 2D/2S t e (se ah ad 25 ’) FILLFILLFILL ? ?? ?? SP/SW1 SP/SW2 SP/SW1SP/SW1 ? SP/SW4 - Alternating lenses of poorly-graded and well-graded sands; interbedded lenses of gray and orange-brown with occasional Fe-staining; occasional lenses of reddish brown, very fine sand SP/SW3 ML ? W-W /4 L M -4D S t b c k 2 ) (se a 5’W-W /4 L M -4D S t b c k 2 ) (se a 5’ ML SP/SW3 SP/SW2 ML SP/SW1 SP/SW3 INTERSECT B-B’INTERSECT B-B’ INTERSECT A-A’INTERSECT A-A’ SP/SW2 SP/SW2 ML SP/SW3 ML ? ? ??? ? ? ? SP/SW1 SP/SW1 SP/SW2 ? ML? ? SP/SW1 ? FILL FILL FILLFILL ? CC ND 0.33 0.12 0.14 ND ND ND ND ND ND ND 0.713 ND ND ND ND ND ND 0.272 0.106 ND 0.057 0.375 ND Analytical in mg/Kg” ND = Not detected at or above the Method Detection Limit (see Table 2) Phone: (661) 831-6906 Fax: (661) 831-6234 E C Remediation2 5300 Woodmere Dr., Suite 105 Bakersfield, CA 93313 CROSS SECTION C - C’ SOIL TCE FIGURE 6B LAKE TAHOE LAUNDRY WORKS 1024 LAKE TAHOE BOULEVARD SOUTH LAKE TAHOE, CALIFORNIA ML SP/SW3 SP/SW2 SP/SW2 SP/SW3 SP/SW3 Horizontal Scale: 1.0-inch = 20 feet 0 20 FT Horizontal Scale Vertical Scale: 1.0-inch = 20 feet 0 20 FT Vertical Scale Legend First Encountered Shallow Water ML - Silt; light gray and orange brown with Fe-staining in places SP/SW1 - SM - Silty Sand; reddish gray; generally very fine sands; non-plastic fines SP - Poorly-Graded Sand SW - Well-Graded Sand Shallow Water Table w/date measured Alternating lenses of poorly-graded and well-graded sands; generally salt & pepper in color with occasional moderate yellow brown lenses SP/SW2 -Alternating lenses of poorly-graded and well-graded sands; generally salt & pepper lenses with interbedded moderate yellow brown and gray lenses SP/SW3 - Alternating lenses of poorly-graded and well-graded sands; salt and pepper, moderate yellow brown and gray SP/SW3 MLML C’C’ 00 2020 4040 EASTWEST 6060 1010 3030 5050 00 2020 4040 6060 1010 3030 5050 LW-M W-8D/8S b (set ack 10’) LW-M W-8D/8S b (set ack 10’) LW -6 S -MW D/6 t a e ’) (se h ad 20 LW -6 S -MW D/6 t a e ’) (se h ad 20 W 5 L -MW-5D/S t e 5 (se a h ad 1 ’)W 5 L -MW-5D/S t e 5 (se a h ad 1 ’) W-MW-3 D/3S LW-MW-3 D/3S L W - L -MW 2D/2S t e (se ah ad 25 ’)W - L -MW 2D/2S t e (se ah ad 25 ’) FILLFILLFILL ? ?? ?? SP/SW1 SP/SW2 SP/SW1SP/SW1 ? SP/SW4 - Alternating lenses of poorly-graded and well-graded sands; interbedded lenses of gray and orange-brown with occasional Fe-staining; occasional lenses of reddish brown, very fine sand SP/SW3 ML ? W-W /4 L M -4D S t b c k 2 ) (se a 5’W-W /4 L M -4D S t b c k 2 ) (se a 5’ ML SP/SW3 SP/SW2 ML SP/SW1 SP/SW3 INTERSECT B-B’INTERSECT B-B’ INTERSECT A-A’INTERSECT A-A’ SP/SW2 SP/SW2 ML SP/SW3 ML ? ? ??? ? ? ? SP/SW1 SP/SW1 SP/SW2 ? ML? ? SP/SW1 ? FILL FILL FILLFILL ? CC ND 0.035 ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND Analytical in mg/Kg” ND = Not detected at or above the Method Detection Limit (see Table 2) Phone: (661) 831-6906 Fax: (661) 831-6234 E C Remediation2 5300 Woodmere Dr., Suite 105 Bakersfield, CA 93313 CROSS SECTION C - C’ SOIL cis-1,2-DCE FIGURE 6C LAKE TAHOE LAUNDRY WORKS 1024 LAKE TAHOE BOULEVARD SOUTH LAKE TAHOE, CALIFORNIA ML SP/SW3 SP/SW2 SP/SW2 SP/SW3 SP/SW3 Horizontal Scale: 1.0-inch = 20 feet 0 20 FT Horizontal Scale Vertical Scale: 1.0-inch = 20 feet 0 20 FT Vertical Scale Legend First Encountered Shallow Water ML - Silt; light gray and orange brown with Fe-staining in places SP/SW1 - SM - Silty Sand; reddish gray; generally very fine sands; non-plastic fines SP - Poorly-Graded Sand SW - Well-Graded Sand Shallow Water Table w/date measured Alternating lenses of poorly-graded and well-graded sands; generally salt & pepper in color with occasional moderate yellow brown lenses SP/SW2 -Alternating lenses of poorly-graded and well-graded sands; generally salt & pepper lenses with interbedded moderate yellow brown and gray lenses SP/SW3 - Alternating lenses of poorly-graded and well-graded sands; salt and pepper, moderate yellow brown and gray SP/SW3 MLML C’C’ 00 2020 4040 EASTWEST 6060 1010 3030 5050 00 2020 4040 6060 1010 3030 5050 LW-M W-8D/8S b (set ack 10’) LW-M W-8D/8S b (set ack 10’) LW -6 S -MW D/6 t a e ’) (se h ad 20 LW -6 S -MW D/6 t a e ’) (se h ad 20 W 5 L -MW-5D/S t e 5 (se a h ad 1 ’)W 5 L -MW-5D/S t e 5 (se a h ad 1 ’) W-MW-3 D/3S LW-MW-3 D/3S L W - L -MW 2D/2S t e (se ah ad 25 ’)W - L -MW 2D/2S t e (se ah ad 25 ’) FILLFILLFILL ? ?? ?? SP/SW1 SP/SW2 SP/SW1SP/SW1 ? SP/SW4 - Alternating lenses of poorly-graded and well-graded sands; interbedded lenses of gray and orange-brown with occasional Fe-staining; occasional lenses of reddish brown, very fine sand SP/SW3 ML ? W-W /4 L M -4D S t b c k 2 ) (se a 5’W-W /4 L M -4D S t b c k 2 ) (se a 5’ ML SP/SW3 SP/SW2 ML SP/SW1 SP/SW3 INTERSECT B-B’INTERSECT B-B’ INTERSECT A-A’INTERSECT A-A’ SP/SW2 SP/SW2 ML SP/SW3 ML ? ? ??? ? ? ? SP/SW1 SP/SW1 SP/SW2 ? ML? ? SP/SW1 ? FILL FILL FILLFILL ? CC ND ND ND ND ND ND 0.71 ND ND ND ND ND 0.51 ND ND ND ND ND ND ND ND ND ND ND Analytical in mg/Kg” ND = Not detected at or above the Method Detection Limit (see Table 2) E C Remediation2 FIGURE 7Phone: (661) 831-6906 Fax: (661) 831-6234 5300 Woodmere Drive, Ste. 105 Bakersfield, California 93313 CROSS SECTION D - D’ LAKE TAHOE LAUNDRY WORKS 1024 LAKE TAHOE BOULEVARD SOUTH LAKE TAHOE, CALIFORNIA B’B’ 00 4040 6060 1010 3030 5050 2020 Legend First Encountered Shallow Water ML - Silt; light gray and orange brown with Fe-staining in places SP/SW1 - SM - Silty Sand; reddish gray; generally very fine sands; non-plastic fines SP - Poorly-Graded Sand SW - Well-Graded Sand Shallow Water Table w/date measured Alternating lenses of poorly-graded and well-graded sands; generally salt & pepper in color with occasional moderate yellow brown lenses SP/SW2 -Alternating lenses of poorly-graded and well-graded sands; generally salt & pepper lenses with interbedded moderate yellow brown and gray lenses SP/SW3 - Alternating lenses of poorly-graded and well-graded sands; salt and pepper, moderate yellow brown and gray SP/SW4 - Alternating lenses of poorly-graded and well-graded sands; interbedded lenses of gray and orange-brown with occasional Fe-staining; occasional lenses of reddish brown, very fine sand BB 00 2020 4040 6060 1010 3030 5050 EASTWEST ? ? ? W-MW-4D/4S L et a ea d107 ’) (s hW-MW-4D/4S L et a ea d107 ’) (s h 7/31/08 ML SP/SW3 SP/SW2 ML ? ? SP/SW1 SP/SW3 FILL 5 LW-MW-5D/S e 5 (set ah ad 2 ’)5 LW-MW-5D/S e 5 (set ah ad 2 ’) 8/1/08 7/24/08 ML SP/SW3 SP/SW3 MLML S LW-MW-6 D /6 s a(et b ck 13’)S LW-MW-6 D /6 s a(et b ck 13’) 8/4/08 FILL SP/SW3 ? SP/SW3 ? SP/SW2SP/SW2 ML SP/SW1 ? SP/SW1 SP/SW1 SP/SW2 ? ? ? ? FILL FILL INTERSECT C-C’INTERSECT C-C’ INTERSECT B-B’INTERSECT B-B’ INTERSECT A-A’INTERSECT A-A’ E C Remediation2 FIGURE 7APhone: (661) 831-6906 Fax: (661) 831-6234 5300 Woodmere Drive, Ste. 105 Bakersfield, California 93313 CROSS SECTION D - D’ SOIL PCE LAKE TAHOE LAUNDRY WORKS 1024 LAKE TAHOE BOULEVARD SOUTH LAKE TAHOE, CALIFORNIA B’B’ 00 4040 6060 1010 3030 5050 2020 Legend First Encountered Shallow Water ML - Silt; light gray and orange brown with Fe-staining in places SP/SW1 - SM - Silty Sand; reddish gray; generally very fine sands; non-plastic fines SP - Poorly-Graded Sand SW - Well-Graded Sand Shallow Water Table w/date measured Alternating lenses of poorly-graded and well-graded sands; generally salt & pepper in color with occasional moderate yellow brown lenses SP/SW2 -Alternating lenses of poorly-graded and well-graded sands; generally salt & pepper lenses with interbedded moderate yellow brown and gray lenses SP/SW3 - Alternating lenses of poorly-graded and well-graded sands; salt and pepper, moderate yellow brown and gray SP/SW4 - Alternating lenses of poorly-graded and well-graded sands; interbedded lenses of gray and orange-brown with occasional Fe-staining; occasional lenses of reddish brown, very fine sand BB 00 2020 4040 6060 1010 3030 5050 EASTWEST ? ? ? W-MW-4D/4S L et a ea d107 ’) (s hW-MW-4D/4S L et a ea d107 ’) (s h ML SP/SW3 SP/SW2 ML ? ? SP/SW1 SP/SW3 FILL 5 LW-MW-5D/S e 5 (set ah ad 2 ’)5 LW-MW-5D/S e 5 (set ah ad 2 ’) ML SP/SW3 SP/SW3 MLML S LW-MW-6 D /6 s a(et b ck 13’)S LW-MW-6 D /6 s a(et b ck 13’) FILL SP/SW3 ? SP/SW3 ? SP/SW2SP/SW2 ML SP/SW1 ? SP/SW1 SP/SW1 SP/SW2 ? ? ? ? FILL FILL INTERSECT C-C’INTERSECT C-C’ INTERSECT B-B’INTERSECT B-B’ INTERSECT A-A’INTERSECT A-A’ ND ND ND 0.713 ND ND ND ND ND ND 0.272 0.106 Analytical in mg/Kg” ND = Not detected at or above the Method Detection Limit (see Table 2) E C Remediation2 FIGURE 7BPhone: (661) 831-6906 Fax: (661) 831-6234 5300 Woodmere Drive, Ste. 105 Bakersfield, California 93313 CROSS SECTION D - D’ SOIL TCE LAKE TAHOE LAUNDRY WORKS 1024 LAKE TAHOE BOULEVARD SOUTH LAKE TAHOE, CALIFORNIA B’B’ 00 4040 6060 1010 3030 5050 2020 Legend First Encountered Shallow Water ML - Silt; light gray and orange brown with Fe-staining in places SP/SW1 - SM - Silty Sand; reddish gray; generally very fine sands; non-plastic fines SP - Poorly-Graded Sand SW - Well-Graded Sand Shallow Water Table w/date measured Alternating lenses of poorly-graded and well-graded sands; generally salt & pepper in color with occasional moderate yellow brown lenses SP/SW2 -Alternating lenses of poorly-graded and well-graded sands; generally salt & pepper lenses with interbedded moderate yellow brown and gray lenses SP/SW3 - Alternating lenses of poorly-graded and well-graded sands; salt and pepper, moderate yellow brown and gray SP/SW4 - Alternating lenses of poorly-graded and well-graded sands; interbedded lenses of gray and orange-brown with occasional Fe-staining; occasional lenses of reddish brown, very fine sand BB 00 2020 4040 6060 1010 3030 5050 EASTWEST ? ? ? W-MW-4D/4S L et a ea d107 ’) (s hW-MW-4D/4S L et a ea d107 ’) (s h ML SP/SW3 SP/SW2 ML ? ? SP/SW1 SP/SW3 FILL 5 LW-MW-5D/S e 5 (set ah ad 2 ’)5 LW-MW-5D/S e 5 (set ah ad 2 ’) ML SP/SW3 SP/SW3 MLML S LW-MW-6 D /6 s a(et b ck 13’)S LW-MW-6 D /6 s a(et b ck 13’) FILL SP/SW3 ? SP/SW3 ? SP/SW2SP/SW2 ML SP/SW1 ? SP/SW1 SP/SW1 SP/SW2 ? ? ? ? FILL FILL INTERSECT C-C’INTERSECT C-C’ INTERSECT B-B’INTERSECT B-B’ INTERSECT A-A’INTERSECT A-A’ ND ND ND ND ND ND ND ND ND ND ND ND ? ? Analytical in mg/Kg” ND = Not detected at or above the Method Detection Limit (see Table 2) E C Remediation2 FIGURE 7CPhone: (661) 831-6906 Fax: (661) 831-6234 5300 Woodmere Drive, Ste. 105 Bakersfield, California 93313 CROSS SECTION D - D’ SOIL cis-1,2-DCE LAKE TAHOE LAUNDRY WORKS 1024 LAKE TAHOE BOULEVARD SOUTH LAKE TAHOE, CALIFORNIA B’B’ 00 4040 6060 1010 3030 5050 2020 Legend First Encountered Shallow Water ML - Silt; light gray and orange brown with Fe-staining in places SP/SW1 - SM - Silty Sand; reddish gray; generally very fine sands; non-plastic fines SP - Poorly-Graded Sand SW - Well-Graded Sand Shallow Water Table w/date measured Alternating lenses of poorly-graded and well-graded sands; generally salt & pepper in color with occasional moderate yellow brown lenses SP/SW2 -Alternating lenses of poorly-graded and well-graded sands; generally salt & pepper lenses with interbedded moderate yellow brown and gray lenses SP/SW3 - Alternating lenses of poorly-graded and well-graded sands; salt and pepper, moderate yellow brown and gray SP/SW4 - Alternating lenses of poorly-graded and well-graded sands; interbedded lenses of gray and orange-brown with occasional Fe-staining; occasional lenses of reddish brown, very fine sand BB 00 2020 4040 6060 1010 3030 5050 EASTWEST ? ? ? W-MW-4D/4S L et a ea d107 ’) (s hW-MW-4D/4S L et a ea d107 ’) (s h ML SP/SW3 SP/SW2 ML ? ? SP/SW1 SP/SW3 FILL 5 LW-MW-5D/S e 5 (set ah ad 2 ’)5 LW-MW-5D/S e 5 (set ah ad 2 ’) ML SP/SW3 SP/SW3 MLML S LW-MW-6 D /6 s a(et b ck 13’)S LW-MW-6 D /6 s a(et b ck 13’) FILL SP/SW3 ? SP/SW3 ? SP/SW2SP/SW2 ML SP/SW1 ? SP/SW1 SP/SW1 SP/SW2 ? ? ? ? FILL FILL INTERSECT C-C’INTERSECT C-C’ INTERSECT B-B’INTERSECT B-B’ INTERSECT A-A’INTERSECT A-A’ ND ND ND ND 0.51 ND ND ND ND ND ND ND ? ? Analytical in mg/Kg” ND = Not detected at or above the Method Detection Limit (see Table 2) LAKE TAHOE LAUNDRY WORKS 1024 LAKE TAHOE BOULEVARD SOUTH LAKE TAHOE, CALIFORNIA Phone: (661) 831-6906 Fax: (661) 831-6234 5300 Woodmere Dr., Suite 105 Bakersfield, CA 93313 E C Remediation2 L A K E T A H B O A R O E U L E V DLOGRENEENU AVERALEYSAUTLNDROMAAUTLNDROMA FIGURE 8ASZA PCE ISOCONCENTRATION PLOT 0 FT F50 T N LEGEND On-Site Dual-Zone Groundwater Monitoring Well Set Off-Site Dual-Zone Temporary Groundwater Monitoring Well Set LW-MW-1S/1D LW-MW-3S/3D MW-45M MW-38M LW-MW-3S LW-MW-1S LW-MW-5S LW-MW-7S LW-MW-6S LW-MW-4S LW-MW-2S LW-MW-8S 706 3.00 4.04 24.5 85.1 45.3 85.3 78.4 20 ? ? ??2 0 2 0 0 ND ?? LAKE TAHOE LAUNDRY WORKS 1024 LAKE TAHOE BOULEVARD SOUTH LAKE TAHOE, CALIFORNIA Phone: (661) 831-6906 Fax: (661) 831-6234 5300 Woodmere Dr., Suite 105 Bakersfield, CA 93313 E C Remediation2 L A K E T A H B O A R O E U L E V DLOGRENEENU AVERALEYSAUTLNDROMAAUTLNDROMA FIGURE 8BSZA TCE ISOCONCENTRATION PLOT 0 FT F50 T N LEGEND On-Site Dual-Zone Groundwater Monitoring Well Set Off-Site Dual-Zone Temporary Groundwater Monitoring Well Set LW-MW-1S/1D LW-MW-3S/3D MW-45M MW-38M LW-MW-3S LW-MW-1S LW-MW-5S LW-MW-7S LW-MW-6S LW-MW-4S LW-MW-2S LW-MW-8S 2.52 74 3.50 1.60 11.0 32.8 7.50 ND ? ? N D ND 20 ???N D ND ??2 0 ? ? L A K E T A H O A R O E B U L E V D LOGRENEENU AVERALEYSAUTLNDROMAAUTLNDROMA LAKE TAHOE LAUNDRY WORKS 1024 LAKE TAHOE BOULEVARD SOUTH LAKE TAHOE, CALIFORNIA Phone: (661) 831-6906 Fax: (661) 831-6234 5300 Woodmere Dr., Suite 105 Bakersfield, CA 93313 E C Remediation2 FIGURE 8CSZA cis-1,2-DCE ISOCONCENTRATION PLOT N SB-5 SB-15 SB-4 0 FT F50 T GW-8 MW-38M MW-45M SB-23 SB-8b*SB-8 SB-17 SB-16 SB-1 SB-2 SB-3 SB-11 SB-13 SB-14 SB-18 SB-12 SB-6 SB-6b SB-22 SB-10 SB-9 SB-5b SB-7 SB-21 SB-20 SB-19 GW-3 GW-4 GW-2 GW-1 Deep GW-5 GW-7 GW-6 GW-9 GW-1 LW-MW-3S LW-MW-1S LW-MW-5S LW-MW-7S LW-MW-6S LW-MW-4S LW-MW-2S LW-MW-8S 31.0 ND 0.60 2.00 8.04 7.00 24.0 41.3 ND ? ??? N D ND ND ?2 0 2 0 ? ? ? LEGEND On-Site Dual-Zone Groundwater Monitoring Well Set Off-Site Dual-Zone Temporary Groundwater Monitoring Well Set LW-MW-1S/1D LW-MW-3S/3D SB-4 Soil Boring/Sampling Location Groundwater Sampling Location USA Site Groundwater Monitoring Well Location MW-38M GW-3 LAKE TAHOE LAUNDRY WORKS 1024 LAKE TAHOE BOULEVARD SOUTH LAKE TAHOE, CALIFORNIA Phone: (661) 831-6906 Fax: (661) 831-6234 5300 Woodmere Dr., Suite 105 Bakersfield, CA 93313 E C Remediation2 L A K E T A H B O A R O E U L E V DLOGRENEENU AVERALEYSAUTLNDROMAAUTLNDROMA FIGURE 9AMZA PCE ISOCONCENTRATION PLOT 0 FT F50 T N LEGEND On-Site Dual-Zone Groundwater Monitoring Well Set Off-Site Dual-Zone Temporary Groundwater Monitoring Well Set LW-MW-1S/1D LW-MW-3S/3D MW-45M MW-38M LW--MW3D LW-MW-1D LW-MW-5D LW-MW-7D LW-MW-6D LW-MW-4D LW-MW-2D LW-MW-8D 137 72.3 1.59 100 1.43 83.7 47.5 15.7 3.45 05 50100 ???? ? 10 ???1 0 ???????? LAKE TAHOE LAUNDRY WORKS 1024 LAKE TAHOE BOULEVARD SOUTH LAKE TAHOE, CALIFORNIA Phone: (661) 831-6906 Fax: (661) 831-6234 5300 Woodmere Dr., Suite 105 Bakersfield, CA 93313 E C Remediation2 MZA TCE ISOCONCENTRATION PLOT L A K E T A H B O A R O E U L E V DLOGRENEENU AVERALEYSAUTLNDROMAAUTLNDROMA FIGURE 9B 0 FT F50 T N LEGEND On-Site Dual-Zone Groundwater Monitoring Well Set Off-Site Dual-Zone Temporary Groundwater Monitoring Well Set LW-MW-1S/1D LW-MW-3S/3D MW-45M MW-38M LW--MW3D LW-MW-1D LW-MW-5D LW-MW-7D LW-MW-6D LW-MW-4D LW-MW-2D LW-MW-8D 7.10 3.12 ND 5.28 2.6729.8 2.70 ND ND ? N D 2 5 ???ND ? ??? 1 0 ? LAKE TAHOE LAUNDRY WORKS 1024 LAKE TAHOE BOULEVARD SOUTH LAKE TAHOE, CALIFORNIA Phone: (661) 831-6906 Fax: (661) 831-6234 5300 Woodmere Dr., Suite 105 Bakersfield, CA 93313 E C Remediation2 L A K E T A H B O A R O E U L E V DLOGRENEENU AVERALEYSAUTLNDROMAAUTLNDROMA FIGURE 9CMZA cis-1,2-DCE ISOCONCENTRATION PLOT 0 FT F50 T N LEGEND On-Site Dual-Zone Groundwater Monitoring Well Set Off-Site Dual-Zone Temporary Groundwater Monitoring Well Set LW-MW-1S/1D LW-MW-3S/3D MW-45M MW-38M LW--MW3D LW-MW-1D LW-MW-5D LW-MW-7D LW-MW-6D LW-MW-4D LW-MW-2D LW-MW-8D 6.10 ND 20.0 ND 17.0 2.31 4.44 7.10 ND DN ? ? N D N D ?5 ??5 1 5 ? ? ? ? ? ? Project Number 1950BK43 September 22, 2008 E2C Remediation Tables TABLES Table 1A Summary of Site Investigation Groundwater Monitoring Data Table 1B Comparison of Groundwater Elevation Data Table 1C Summary of Site Investigation SZA Groundwater Analytical Data Table 1D Summary of Site Investigation MZA Groundwater Analytical Data Table 2 Summary of Site Investigation Soil Analytical Data Table 3 Summary of Well Construction Details Table 4 Summary of Flow Cell Monitoring Data – September 14, 2008