Former Fort Ord Sites 2 and 12 Data and Status

Transcription

1 Sites 2 and 12 Data and Status Meeting, Table 1: GWTP and SVTU Statistics as of October 31, 2016 COC Mass Monthly Statistics Volume Treated Average Flow Percent of Time Online Removed (pounds) Oct 2016 GWTP 5,951,025 gal 133 gpm Total since April Billion gal 478 Oct 2016 SVTU 35,966,922 scf 787 scfm Total since Sept Billion scf 6.13 Table 2: Oct 2016 Treated Water Analytical Results at TS 212 INJ COC Discharge Limit (µg/l) 2 Sample Date / Analytical Results 10/11/2016 1,1 Dichloroethene (1,1 DCE) 6.0 ND 1,2 Dichloroethane (1,2 DCA) J 1,3 dichloropropene (1,3 DCP) ND Chloroform J cis 1,2 dichloroethene (cis 1,2 DCE) Tetrachloroethene (PCE) 3.0 ND Trichloroethene (TCE) 5.0 ND Vinyl Chloride (VC) 0.10 ND October 2016 Key Events for Oct 19: Based on 3Q 2016 SGM and GWM results, made SVE operational changes. Southern SVE wells to capture TCE above the SGCL: VE 12 01, VE 12 02, and VE Northern SVE Wells near PCE groundwater plume: VE 12 06, VE 12 09, and VE November 2016 Key Events for Nov 1: GWTP antenna maintenance. Nov 14 30: fourth quarter 2016 SGM event.

2 Table 3. Select Groundwater Extraction/Monitoring Well Data Select COC Concentrations (µg/l) 4 2Q Q Q Q 2016 Well Identification 3 TCE PCE ACL: EW M ND 0.37 J EW M 2.5 NS 1.5 NS EW M EW M J EW U J MW 12 09R J 0.32 J MW M J 0.30 J MW M J 0.15 J MW U 6 NS ND NS 0.12 J MW U 0.41 J J MW U ND ND MW U 0.25 J 0.17 J MW U ND ND MW M J 0.32 J 0.38 J Notes: 1 The reported value is the sum of both cis and trans isomers. 2 Discharge limits are the ACLs for injection over the plume. 3 Extraction wells not listed have met the QAPP decision rules to no longer operate. 4 Concentration in bold is equal to or exceeds the Aquifer Cleanup Level (ACL). 5 MW M 1,2 DCA 0.28 J µg/l 2Q 2016 and 0.52 µg/l 3Q MW U chloroform 0.99 µg/l 3Q 2016 (ACL 2.0). J: Estimated results below the limit of quantitation (LOQ). ND: The analyte was not detected at or above the limit of detection (LOD). gpm: gallon(s) per minute gal: gallon(s) COC: chemical of concern NS: Not sampled scf: standard cubic foot or feet scfm: standard cubic feet per minute µg/l: micrograms per liter Slide 2

3 Wells Meeting QAPP Criteria for Sample Frequency Change* Primary Chemical of Figure 1, Sites 2 and 12 Concern EW U A Meets decision criteria to stop sampling 1 Trichloroethene (TCE) MW U A Meets decision criteria to stop sampling Tetrachloroethene (PCE) MW U A Meets decision criteria to stop sampling PCE Notes: *Based on data collected through the 3rd quarter of A = Well currently sampled on an annual schedule 1 If two consecutive annual monitoring data show concentrations of COCs below their respective limits of quantitation (LOQs), or below 10% of their respective aquifer cleanup levels (ACLs), whichever is greater, then the well may be proposed to be removed from the sampling program (Ahtna, 2015). Ahtna Environmental Inc (Ahtna), 2016 Quality Assurance Project Plan (QAPP),, California, Volume I, Appendix A, Final Revision 4, Groundwater Remedies and Monitoring at Operable Unit 2, Sites 2 and 12, and Operable Unit Carbon Tetrachloride Plume, June 26. (QAPP, AR# BW 2785A) Slide 3

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8 Table 4. Soil Gas Monitoring Results Soil Gas Probe 1Q Q Q Q Q Q 2016 ID PCE TCE SG NS 950 ND NS ND SG NS 970 ND NS ND SG NS 650 ND NS ND SG NS NS 350 NS NS ND SG NS 240 ND NS ND SG NS NS 230 NS NS ND SG ,200 1,500 1,400 ND ND ND SG NS NS 1,300 NS NS ND SG NS NS 1,100 NS NS ND SG NS NS 1,100 NS NS ND SG NS NS 1,000 NS NS ND SG NS NS 1,000 NS NS ND SG NS 1,100 1,000 NS ND ND SG ND ND 140 ND ND 150 SG ND NS 150 ND NS 120 SG NS NS 130 NS NS 43 J SG NS NS 130 NS NS 44 J SG NS NS 120 NS NS 43 J SG NS NS 140 NS NS ND Table 4 (continued). Soil Gas Monitoring Results Soil Gas Probe 1Q Q Q Q Q Q 2016 ID PCE TCE SG NS NS 160 NS NS ND SG NS NS 200 NS NS ND SG NS NS 220 NS NS ND SG NS NS 110 NS NS ND SG NS 420 ND NS ND SG , ND ND ND SG NS 430 ND NS ND SG NS 430 ND NS ND SG NS 400 ND NS ND SG ND ND ND SG NS NS ND NS NS ND SG ND NS 67 J ND NS ND SG ND NS 70 J ND NS ND SG NS 110 ND NS ND SG NS 200 ND NS ND SG NS 420 ND NS 75 SG J NS 670 ND NS 96 Notes: J = estimated result below the limit of quantitation (LOQ) ND = not detected above the limit of detection (LOD) NS = not sampled Concentrations in bold exceed the SGCL Concentrations in italics exceed the SG SL Results reported in micrograms per cubic meter SGCL SG SL PCE 1, TCE 1, Slide 8

9 Table 4 (continued). Soil Gas Monitoring Results Soil Gas Probe 1Q Q Q Q Q Q 2016 ID PCE TCE SG NS 170 ND NS ND SG ND NS 110 ND NS ND SG J NS 98 ND NS ND SG NS 170 ND NS ND SG J NS 230 ND NS ND SG ND ND ND SG ND ND ND SG NS NS 370 NS NS ND SG NS NS 310 NS NS ND SG NS NS 220 NS NS ND SG NS NS 140 NS NS ND SG NS NS 160 NS NS ND SG NS NS 160 NS NS ND SG NS NS 89 NS NS ND SG NS NS ND NS NS ND SG NS NS ND NS NS ND SG NS NS ND NS NS ND SG NS NS 100 NS NS ND SG NS NS 57 J NS NS ND Notes: J = estimated result below the limit of quantitation (LOQ) ND = not detected above the limit of detection (LOD) NS = not sampled Concentrations in bold exceed the SGCL Concentrations in italics exceed the SG SL Results reported in micrograms per cubic meter Table 4 (continued). Soil Gas Monitoring Results Soil Gas Probe 1Q Q Q Q Q Q 2016 ID PCE TCE SG NS NS 350 NS NS ND SG NS NS 220 NS NS ND SG NS NS ND NS NS ND SG NS NS 220 NS NS ND SG NS NS 340 NS NS ND SG NS NS 330 NS NS ND SG ND ND ND ND 42 J ND SG ND ND ND J SG ND NS ND 120 NS 54 J SG ND NS ND 53 J NS ND SG ND NS ND 220 NS 74 SG ND ND ND J SG ND ND ND SG ND ND ND 56 J ND ND SG ND ND ND SG ND ND ND 340 5, J SG ND ND ND ,200 SG ND ND ND J SG ND ND ND J SG ND ND ND 1, SGCL SG SL PCE 1, TCE 1, Slide 9

10 Table 4 (continued). Soil Gas Monitoring Results Soil Gas Probe 1Q Q Q Q Q Q 2016 ID PCE TCE SG NS NS ND NS NS ND SG NS NS ND NS NS ND SG NS NS ND NS NS ND SG NS NS 61 J NS NS ND SG NS NS 57 J NS NS ND SG NS NS ND NS NS ND SG NS NS ND NS NS ND SG NS NS 59 J NS NS ND SG ,500 ND ND ND SG NS 1,100 ND NS ND SG NS NS 510 NS NS ND SG NS NS 440 NS NS ND SG NS NS 360 NS NS ND SG NS NS 280 NS NS ND SG NS NS 220 NS NS ND SGCL SG SL PCE 1, TCE 1, Table 5. Northern Soil Vapor Extraction Well Field Monitoring Results North SVE Field Sample VE VE VE VE VE Date PCE TCE PCE TCE PCE TCE PCE TCE PCE TCE 9/16/2015 1,700 ND 1,200 ND 2,100 ND 1, J 460 ND 9/22/2015 1,100 ND 750 ND 1,200 ND 1, ND 9/29/ ND 860 ND 970 ND 1, ND 10/6/ ND 560 ND 670 ND J 180 ND 11/12/ ND ND 410 ND 97 ND 12/8/ ND ND 350 ND ND ND 3/1/ J ND ND ND 130 ND 190 ND 44 J ND 6/6/ ND 55 J ND 120 ND 190 ND 48 J ND 9/30/2016* 54 J ND 130 ND 190 ND 310 ND 92 ND Notes: J = estimated result below the limit of quantitation (LOQ) ND = not detected above the limit of detection (LOD) NS = not sampled Concentrations in bold exceed the SGCL Concentrations in italics exceed the SG SL Results reported in micrograms per cubic meter *SVE Northern well field offline mid July to Sept 23, 2016 (approx. 10 weeks), and online for one week prior to sampling for rebound study. Slide 10

11 Table 6. Southern Soil Vapor Extraction Well Field Monitoring Results South SVE Field Sample VE VE VE VE VE Date PCE TCE PCE TCE PCE TCE PCE TCE PCE TCE 5/9/2014 ND 7, , , ,400 5/14/ , , , ,100 5/16/ , , /20/ /23/ NS NS NS NS /27/ NS NS NS NS NS NS NS NS 5/28/ NS NS NS NS NS NS NS NS 5/29/ NS NS NS NS NS NS NS NS 5/30/ NS NS NS NS NS NS NS NS 6/2/ /5/ /12/ /19/ /8/2016 NS NS ND 370 NS NS NS NS NS NS 1/22/2016 ND 240 NS NS NS NS NS NS NS NS 3/1/2016 NS NS ND 130 NS NS NS NS NS NS 6/7/2016 ND 72 ND 86 NS NS NS NS NS NS 9/14/2016 ND ND ND ND ND 95 ND ND ND ND Notes: ND = not detected above the limit of detection (LOD) NS = not sampled Concentrations in bold exceed the SGCL Concentrations in italics exceed the SG SL Results reported in micrograms per cubic meter SGCL SG SL PCE 1, TCE 1, Slide 11

12 TCE 1/8/2016 1/22/2016 1/29/2016 2/5/2016 2/12/2016 2/19/2016 2/26/2016 3/4/2016 3/11/2016 3/18/2016 3/25/2016 4/1/2016 4/8/2016 4/15/2016 4/22/2016 4/29/2016 1/15/2016 5/13/2016 5/6/2016 6/17/2016 5/20/2016 5/27/2016 6/3/2016 6/10/2016 6/24/2016 7/1/2016 7/8/2016 7/15/2016 7/22/2016 7/29/2016 8/5/2016 8/12/2016 8/19/2016 8/26/2016 9/2/2016 9/9/2016 Date VE VE VE Slide 12

13 2,500 2,000 1,500 1, PCE 5/23/2016 6/2/2016 6/12/2016 6/22/2016 7/2/2016 7/12/2016 7/22/2016 8/1/2016 8/11/2016 8/21/2016 8/31/2016 9/10/2016 9/20/2016 9/30/2016 9/16/2015 9/26/ /6/ /16/ /26/ /5/ /15/ /25/ /5/ /15/ /25/2015 1/4/2016 1/14/2016 1/24/2016 2/3/2016 2/13/2016 2/23/2016 3/4/2016 3/14/2016 3/24/2016 4/3/2016 4/13/2016 4/23/2016 5/3/2016 5/13/2016 VE VE VE VE VE Date Slide 13

14 TCE 5/23/2016 6/2/2016 6/12/2016 6/22/2016 7/2/2016 7/12/2016 7/22/2016 8/1/2016 8/11/2016 8/21/2016 8/31/2016 9/10/2016 9/20/2016 9/30/2016 9/16/2015 9/26/ /6/ /16/ /26/ /5/ /15/ /25/ /5/ /15/ /25/2015 1/4/2016 1/14/2016 1/24/2016 2/3/2016 2/13/2016 2/23/2016 3/4/2016 3/14/2016 3/24/2016 4/3/2016 4/13/2016 4/23/2016 5/3/2016 5/13/2016 VE VE VE VE VE Date Slide 14

15 2016 4Q SGM and SVE Sampling Schedule SG near surface in front of Target SG near surface in front of Michaels SG near surface in front of Kohl's SG near GW interface within the GW PCE plume footprint SG near GW interface within the GW PCE plume footprint SG (3 probes: 30, 40, and 50) southern area with TCE above SGCL Six operating SVE wells and SVTU Influent and Effluent Slide 15