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ST1002-SY120106
Page 1 of 1 Keith Marvin - Water Line Trench Sample From: Frank Clark <fclark@wh-m.com> To: "pkittles@coppelltx.gov" <pkittles@coppelltx.gov> Date: 1/6/2012 9:39 AM Subject: Water Line Trench Sample Attachments: Letter report - Water Trench Soil Sample 1-6-12.pdf Perri- Attached is a brief report for the water line trench soil sample I recovered. All is good. Let me know if you have any questions. Frank Frank W. Clark, PE, PG W&M Environmental Group, Inc. 906 E. 18th Street Plano, Texas 75074 972-509-9611 Direct 972-516-4145 Fax 214-668-4467 Cell fclark@wh-m.com please don't print this e-mail unless you really need to. file://C:\Documents and Settings\radloo\Local Settings\Temp\XPgrpwise\4F06C4BBCity_...4/23/2012 OP TO Von E _�. GROUP INC. a 2 ,Or 0" January 6, 2012 Ms. Perri Kittles, Environmental Health Officer City of Coppell Environmental Health Department 816 S. Coppell Road Coppell, Texas 75019 RE: Results of Soil Sampling Water Line Trench - W. Bethel Road Coppell, Texas W &M Project No. 940.005 Dear Ms. Kittles: This letter summarizes the analytical results for a soil sample recovered from a water line trench located in West Bethel Road, Coppell, Texas. At the City's request, W &M Environmental Group, Inc. (W &M) recovered the soil sample from a shallow service trench excavated by a City contractor near 448 W. Bethel Road. The sample was taken at a depth of 2.5 to 3 feet below grade, and exhibited a moderate petroleum odor. Based on its shallow depth and the absence of similar odors in other portions of the excavation, the source of the odor could not be established. W &M placed the soil sample in glass jars and delivered it to Oxidor Laboratories, LLC under chain -of- custody. The sample was analyzed for volatile organic compounds (VOCs) using EPA Method 8260B and total petroleum hydrocarbons (TPH) using Texas Method TX1005 to assess the presence of common contaminants associated with gasoline and similar petroleum products. Oxidor's analytical report is attached. Ten individual VOCs were detected above method quantitation limits (MQLs), each of which is associated with gasoline. Additionally, TPH in the carbon range C6-C12 (indicative of a light petroleum compound similar to gasoline) was reported above MQLs. To assess the significance of the data, W &M summarized the results for each compound in comparison to the Texas Risk Reduction Program (TRRP) Tier 1 Protective Concentration Levels (PCLs) for human exposure with a commercial /industrial land use ( t Soil co ,,, b ). For comparison purposes, the concentrations reported by Oxidor (ug/kg, or parts per billion) have been converted to milligrams per kilogram, or parts per million (ppm). www.wh•m.can AUSTIN FORT WORTH HOUSTON PLANO Reported Concentration TRRP Tier 1 PCL Compound (mg /kg) (C/I Land Use) (mg /kg) 1,2,4 - Trimethylbenzene 64.2 220 1,3,5 - Trimethylbenzene 21.2 160 ethyl benzene 2.92 29,000 isopropylbenzene 2.34 11,000 m -p xylene 9.31 13,000 n- propylbenzene 9.04 7,300 naphthalene 7.78 360 o- Xylene 6.03 91,000 p- Isopropylbenzene 1.43 100,000 sec - butylbenzene 2.40 41,000 TPH (C -C 103 3,900 Each of the detected compounds was present below its respective human health PCL for commercial /industrial land use. Similar PCLs for exposure of construction workers would be much higher, so there is no evidence of unacceptable risk associated with construction worker exposure to these soils in the water line excavation. Please contact us if you have any questions on these results. Very truly yours, W &M ENVIRONMENTAL GROUP, INC. I) Frank W. Clark, P.E., P.G. Senior Consultant Attachment tt+ Acco (��r Order ID: 11120451 OXInOR Laboratories LLC �� w `� Date: 12/27/2011 Mims < etx x x Page 1 of 17 T104704227 -11 -6 Tuesday, December 27, 2011 W &M Environmental Group, Inc. Frank Clark 906 E. 18th, Suite 100 Plano, TX 75074 Tel: (972) 516 -0300 Fax: (972) 516 -4145 Re: Project Name: Water Service Trench Project Location: City of Coppell Oxidor received 1 solid sample(s). The analysis performed were as follows: Sample Sample ID Matrix Collected Analysis 11120451 -001 Water svc. Trench Solid 12/16/2011 13:20 Dry Weight, Total Petroleum Hydrocarbons, Volatile Organic Compounds Respectfully submitted, at— /2 •/ -- Charles Brungardt President www.OXIDOR.com • 1825 E. Plano Parkway #160 • Plano, TX 75074 • Tel: (972) 424 -6422 • Fax (972) 424 -6508 �$ AG CO rycc d ,K a Order ID: 11120451 _ OXIDOR Laboratories LLC ." - + 4 Date. 12/27/2011 IIIIIIIm 1 . = Page 2 of 17 T104704227-11-6 W &M Environmental Group, Inc. Frank Clark Analytical Report Project Name: Water Service Trench Customer Sample ID: Water svc. Trench Oxidor Sample ID: 11120451 -001 Matrix: Solid Sample Received: 12/19/2011 Sample Collected: 12/16/2011 13:20 Parameter MQL SQL Result Units Date Analyzed Method Analyst Flags General Chemistry % Solids 0.1 0.1 75.2 % 12/19/11 17:10 Dry Weight E.C. Volatile Organic Compounds 1,1,1,2 - Tetrachloroethane 5 332 ND pg /kg 12/21/11 17:06 8260B V.D.L. D -1 1,1,1 - Trichloroethane 5 332 ND pg /kg 12/21/11 17:06 8260B V.D.L. D -1 1,1,2,2 - Tetrachloroethane 5 332 ND pg /kg 12/21/11 17:06 8260B V.D.L. D -1 1,1,2 - Trichloroethane 5 332 ND pg /kg 12/21/11 17:06 8260B V.D.L. D -1 1,1- Dichloroethane 5 332 ND pg /kg 12/21/11 17:06 8260B V.D.L. D -1 1,1- Dichloroethene 5 332 ND pg /kg 12/21/11 17:06 8260B V.D.L. D -1 1,1- Dichloropropene 5 332 ND pg /kg 12/21/11 17:06 8260B V.D.L. D -1 1,2,3 - Trichlorobenzene 5 332 ND pg /kg 12/21/11 17:06 8260B V.D.L. D -1 1,2,3 - Trichloropropane 5 332 ND pg /kg 12/21/11 17:06 8260B V.D.L. D -1 1,2,4 - Trichlorobenzene 5 332 ND pg /kg 12/21/11 17:06 8260B V.D.L. D -1 1,2,4 - Trimethylbenzene 5 3320 64200 pg /kg 12/21/11 17:33 8260B V.D.L. D -1 1,2- Dibromo -3- 5 332 ND pg /kg 12/21/11 17:06 8260B V.D.L. D -1 chloropropane 1,2- Dibromoethane 5 332 ND pg /kg 12/21/11 17:06 8260B V.D.L. D -1 1,2- Dichlorobenzene 5 332 ND pg /kg 12/21/11 17:06 8260B V.D.L. D -1 1,2- Dichloroethane 4 266 ND pg /kg 12/21/11 17:06 8260B V.D.L. D -1 1,2- Dichloropropane 5 332 ND pg /kg 12/21/11 17:06 8260B V.D.L. D -1 1,3,5 - Trimethylbenzene 5 3320 21200 pg /kg 12/21/11 17:33 8260B V.D.L. D -1 1,3- Dichlorobenzene 5 332 ND pg /kg 12/21/11 17:06 8260B V.D.L. D -1 1,3- Dichloropropane 5 332 ND pg /kg 12/21/11 17:06 8260B V.D.L. D -1 1,4- Dichlorobenzene 5 332 ND pg /kg 12/21/11 17:06 8260B V.D.L. D -1 2,2- Dichloropropane 5 332 ND pg /kg 12/21/11 17:06 8260B V.D.L. D -1 2- Butanone 50 3320 ND pg /kg 12/21/11 17:06 8260B V.D.L. D -1 2- Chlorotoluene 5 332 ND pg /kg 12/21/11 17:06 8260B V.D.L. D -1 2- Hexanone 50 3320 ND pg /kg 12/21/11 17:06 8260B V.D.L. D -1 4- Chlorotoluene 5 332 ND pg /kg 12/21/11 17:06 8260B V.D.L. D -1 4- Methyl -2- pentanone 50 3320 ND pg /kg 12/21/11 17:06 8260B V.D.L. D -1 Acetonitrile 50 3320 ND pg /kg 12/21/11 17:06 8260B V.D.L. D -1 Acrylonitrile 20 1330 ND pg /kg 12/21/11 17:06 8260B V.D.L. D -1 Benzene 5 332 ND pg /kg 12/21/11 17:06 8260B V.D.L. D -1 Bromobenzene 5 332 ND pg /kg 12/21/11 17:06 8260B V.D.L. D -1 Bromochloromethane 5 332 ND pg /kg 12/21/11 17:06 8260B V.D.L. D -1 Bromodichloromethane 5 332 ND pg /kg 12/21/11 17:06 8260B V.D.L. D -1 Bromoform 5 332 ND pg /kg 12/21/11 17:06 8260B V.D.L. D -1 Bromomethane 5 332 ND pg /kg 12/21/11 17:06 8260B V.D.L. D -1 Carbon Tetrachloride 5 332 ND pg /kg 12/21/11 17:06 8260B V.D.L. D -1 Chlorobenzene 5 332 ND pg /kg 12/21/11 17:06 8260B V.D.L. D -1 Chloroethane 25 1660 ND pg /kg 12/21/11 17:06 82608 V.D.L. ',D -1 Chloroform 5 332 ND pg /kg 12/21/11 17:06 8260B V.D.L. D -1 www OXIDOR.com • 1825 E. Plano Parkway #160 • Plano. TX 75074 • Tel: (972) 424 -6422 • Fax: (972) 424 -6508 ,µ acc anis . . c 9d Order ID: 11120451 __ • OXIDOR Laboratories LLC `' Date: 12/27/2011 Page 3 of 17 T104704227 -11 -6 W &M Environmental Group, Inc. Frank Clark Analytical Report Project Name: Water Service Trench Customer Sample ID: Water svc. Trench Oxidor Sample ID: 11120451 -001 Matrix: Solid Parameter MQL SQL Result Units Date Analyzed Method Analyst Flags Volatile Organic Compounds Chloromethane 5 332 ND pg /kg 12/21/11 17:06 8260B V.D.L. D -1 Cis -1,2- dichloroethene 5 332 ND pg /kg 12/21/11 17:06 8260B V.D.L. D -1 Cis -1,3- dichloropropene 5 332 ND pg /kg 12/21/11 17:06 8260B V.D.L. D -1 Dibromochloromethane 5 332 ND pg /kg 12/21/11 17:06 8260B V.D.L. D -1 Dibromomethane 5 332 ND pg /kg 12/21/11 17:06 8260B V.D.L. D -1 Dichlorodifluoromethane 5 332 ND pg /kg 12/21/11 17:06 8260B V.D.L. D -1 Ethylbenzene 5 332 2920 pg /kg 12/21/11 17:06 8260B V.D.L. D -1 Hexachlorobutadiene 5 332 ND pg /kg 12/21/11 17:06 8260B V.D.L. D -1 lsopropylbenzene 5 332 2340 pg /kg 12/21/11 17:06 8260B V.D.L. D -1 m,p- Xylene 10 665 9310 pg /kg 12/21/11 17:06 8260B V.D.L. D -1 Methylene Chloride 4 266 ND pg /kg 12/21/11 17:06 8260B V.D.L. D -1 MTBE 5 332 ND pg /kg 12/21/11 17:06 8260B V.D.L. D -1 N- butylbenzene 5 332 ND pg /kg 12/21/11 17:06 8260B V.D.L. D -1 N- propylbenzene 5 332 9040 pg /kg 12/21/11 17:06 8260B V.D.L. D -1 Naphthalene 10 665 7780 pg /kg 12/21/11 17:06 8260B V.D.L. D -1 o- Xylene 5 332 6030 pg /kg 12/21/11 17:06 8260B V.D.L. D -1 p- Isopropyltoluene 5 332 1430 pg /kg 12/21/11 17:06 8260B V.D.L. D -1 Sec - butylbenzene 5 332 2400 pg /kg 12/21/11 17:06 8260B V.D.L. D -1 Styrene 5 332 ND pg /kg 12/21/11 17:06 8260B V.D.L. D -1 Tert- butylbenzene 5 332 ND pg /kg 12/21/11 17:06 8260B V.D.L. D -1 Tetrachloroethene 5 332 ND pg /kg 12/21/11 17:06 8260B V.D.L. D -1 Toluene 5 332 ND pg /kg 12/21/11 17:06 8260B V.D.L. D -1 Trans -1,2- dichloroethene 5 332 ND pg /kg 12/21/11 17:06 8260B V.D.L. D -1 Trans -1,3- dichloropropene 5 332 ND pg /kg 12/21/11 17:06 8260B V.D.L. D -1 Trichloroethene 5 332 ND pg /kg 12/21/11 17:06 8260B V.D.L. ',D -1 Trichlorofluoromethane 5 332 ND pg /kg 12/21/11 17:06 8260B V.D.L. D -1 Vinyl Chloride 5 332 ND pg /kg 12/21/11 17:06 8260B V.D.L. D -1 Surrogate Result Units Spike Conc Recovery Rec Limits Date Analyzed: 12/21/11 17:06 Analyst: V.D.L. Dibromofluoromethane 49.6 pg /kg 50 pg /kg 99% 80 -120% 1,2 Dichloroethane -d4 50.4 pg /kg 50 pg /kg 101% 80 -120% Toluene -d8 51.5 pg /kg 50 pg /kg 103% 81 -117% 4- Bromofluorobenzene 51.7 pg /kg 50 pg /kg 103% 74-121% Date Analyzed: 12/21/11 17:33 Analyst: V.D.L. Dibromofluoromethane 48.8 pg /kg 50 pg /kg 98% 80 -120% 1,2 Dichloroethane -d4 48.7 pg /kg 50 pg /kg 97% 80 -120% Toluene -d8 50.2 pg /kg 50 pg /kg 100% 81 -117% 4- Bromofluorobenzene 45.9 pg /kg 50 pg /kg 92% 74-121% Total Petroleum Hydrocarbons Prepared by method TX 1005 on 12/20/11 at 10:00 TPH (C 6 to C12) 25 33.2 103 mg /Kg 12/21/11 03:21 TX 1005 T.N. www.OXIDOR.com • 1825 E. Plano Parkway #160 • Plano, TX 75074 • Tel: (972) 424 -6422 • Fax: (972) 424 -6508 1K AC Cp � � a , Order ID: 11120451 viol - +� OXIDOR Laboratories, LLC � � " Date: 12/27/2011 ms w g aim z Page 4of17 T104704227 -11 -6 W &M Environmental Group, Inc. Frank Clark Analytical Report Project Name: Water Service Trench Customer Sample ID: Water svc. Trench Oxidor Sample ID: 11120451 -001 Matrix: Solid Parameter MQL SQL Result Units Date Analyzed Method Analyst Flags Total Petroleum Hydrocarbons TPH (C12 to C28) 25 33.2 ND mg /Kg 12/21/11 03:21 TX 1005 T.N. * TPH (C28 to C35) 25 33.2 ND mg /Kg 12/21/11 03:21 TX 1005 T.N. TPH (C6 to C35) 25 33.2 103 mg /Kg 12/21/11 03:21 TX 1005 T.N. Surrogate Result Units Spike Conc Recovery Rec Limits 1- chlorooctane 55.9 mg /Kg 50 mg /Kg 112% 70 -130% o- Terphenyl 54.7 mg /Kg 50 mg /Kg 109% 70 -130% www.OXIDOR.com • 1825 E. Plano Parkway #160 • Plano, TX 75074 • Tel: (972) 424 -6422 • Fax: (972) 424 -6508 °' A o Order ID: 11120451 mini ' UMW O IDOR Laboratories LLC 4. i). ° Date: 12/27/2011 4 Page 5 of 17 T104704227 -11 -6 W &M Environmental Group, Inc. Frank Clark Sample Cross Reference Project Name: Water Service Trench Customer ID: Lab ID: Test Method QCBatchID: Water svc. Trench 11120451 -001 Total Petroleum Hydrocarbons TX 1005 1005_02827AS Dry Weight Dry Weight DW_10124_S Volatile Organic Compounds 8260B VOC_63111 www.OXIDOR.com • 1825 E. Plano Parkway #160 • Plano, TX 75074 • Tel (972) 424 -6422 • Fax: (972) 424 -6508 C t I, µ AC CO ,E- 9D S y Order ID: 11120451 OXIDOR Laboratories LLC U a , Da 12/27/2011 a z Page 6 of 17 T104704227 -11 -6 W &M Environmental Group, Inc. Frank Clark QC Summary Project Name: Water Service Trench Reference Rec RPD QC Type Parameter Result Value Spike Conc Rec Limits RPD Limits Flags QCBatchlD DW Replicate % Solids 83.8 % 81.3 % 3.1% 0 -20% QCBatchlD 1005_02827AS _ Blank TPH (C 6 to C12) ND mg /Kg TPH (C12 to C28) ND mg /Kg TPH (C28 to C35) ND mg /Kg TPH (C6 to C35) ND mg /Kg Surrogate Result Spike Conc Recovery Rec Limits 1- chlorooctane 53.0 mg /Kg 50 mg /Kg 106% 70 -130% o- Terphenyl 56.2 mg /Kg 50 mg /Kg 112% 70 -130% LCS TPH (C6 to C35) 102 mg /Kg 100 mg /Kg 102% 75 -125% Surrogate Result Spike Conc Recovery Rec Limits 1- chlorooctane 53.8 mg /Kg 50 mg /Kg 108% 70 -130% o- Terphenyl 56.6 mg /Kg 50 mg /Kg 113% 70 -130% LCSD TPH (C6 to C35) 95.9 mg /Kg 100 mg /Kg 96% 75 -125% 6.2% 0 -20% Surrogate Result Spike Conc Recovery Rec Limits 1- chlorooctane 55.5 mg /Kg 50 mg /Kg 111% 70 -130% o- Terphenyl 57.0 mg /Kg 50 mg /Kg 114% 70 -130% MS TPH (C6 to C35) 48.2 mg /Kg ND 100 mg /Kg 48% 75- 125% Q -7 Surrogate Result Spike Conc Recovery Rec Limits 1- chlorooctane 48.2 mg /Kg 50 mg /Kg 96% 70 -130% o- Terphenyl 50.2 mg /Kg 50 mg /Kg 100% 70 -130% MSD TPH (C6 to C35) 75.8 mg /Kg ND 100 mg /Kg 76% 75 -125% 44.5% 0 -20% Q -7 Surrogate Result Spike Conc Recovery Rec Limits 1- chlorooctane 48.2 mg /Kg 50 mg /Kg 96% 70- 130% o- Terphenyl 51.0 mg /Kg 50 mg /Kg 102% 70 -130% QCBatchlD VOC Blank Dichlorodifluoromethane ND pg /kg Chloromethane ND pg /kg Vinyl Chloride ND pg /kg Bromomethane ND pg /kg Chloroethane ND pg /kg Trichlorofluoromethane ND pg /kg 1,1- Dichloroethene ND pg /kg Acetonitrile ND pg /kg Methylene Chloride ND pg /kg Acrylonitrile ND pg /kg Trans -1,2- dichloroethene ND pg /kg MTBE ND pg /kg 1,1- Dichloroethane ND pg /kg 2,2- Dichloropropane ND pg /kg Cis -1,2- dichloroethene ND pg /kg www.OXIDOR.com • 1825 E. Plano Parkway #160 • Plano, TX 75074 • Tel: (972) 424 - 6422 • Fax: (972) 424 - 6508 ACCO, titi os✓ Order ID: 11120451 z OXIDOR Laboratories LLC U� ` F Date: 12/27/2011 Page 7 of 17 T104704227 -11 -6 W &M Environmental Group, Inc. Frank Clark QC Summary Project Name: Water Service Trench Reference Rec RPD QC Type Parameter Result Value Spike Conc Rec Limits RPD Limits Flags QCBatchlD VOC 2- Butanone ND pg /kg Bromochloromethane ND pg /kg Chloroform ND pg /kg 1,1,1 - Trichloroethane ND pg /kg 1,1- Dichloropropene ND pg /kg Carbon Tetrachloride ND pg /kg Benzene ND pg /kg 1,2- Dichloroethane ND pg /kg Trichloroethene ND pg /kg 1,2- Dichloropropane ND pg /kg Dibromomethane ND pg /kg Bromodichloromethane ND pg /kg Cis -1,3- dichloropropene ND pg /kg 4- Methyl -2- pentanone ND pg /kg Toluene ND pg /kg Trans -1,3- dichloropropene ND pg /kg 1,1,2 - Trichloroethane ND pg /kg 1,3- Dichloropropane ND pg /kg Tetrachloroethene ND pg /kg 2- Hexanone ND pg /kg Dibromochloromethane ND pg /kg 1 ,2-Dibromoethane ND pg /kg Chlorobenzene ND pg /kg 1,1,1,2- Tetrachloroethane ND pg /kg Ethylbenzene ND pg /kg m,p- Xylene ND pg /kg o- Xylene ND pg /kg Styrene ND pg /kg Bromoform ND pg /kg Isopropylbenzene ND pg /kg 1,1,2,2- Tetrachloroethane ND pg /kg Bromobenzene ND pg /kg 1,2,3 - Trichloropropane ND pg /kg N- propylbenzene ND pg /kg 2- Chlorotoluene ND pg /kg 1,3,5- Trimethyl benzene ND pg /kg 4- Chlorotoluene ND pg /kg Tert- butylbenzene ND pg /kg 1,2,4 - Trimethylbenzene ND pg /kg Sec - butylbenzene ND pg /kg 1,3- Dichlorobenzene ND pg /kg p- Isopropyltoluene ND pg /kg 1,4- Dichlorobenzene ND pg /kg www.OXIDOR.com • 1825 E. Plano Parkway #160 • Plano, TX 75074 • Tel' (972) 424 -6422 • Fax: (972) 474 -6508 K Accp ' MOM n ',� �r . �� a Order ID: 11120451 ~`� OX IDOR Laboratories LLC � ° , `'` `�¢ Date. 12/27/2011 N " �"► ? U d • z Page 8 of 17 T104704227 -11 -6 W &M Environmental Group, Inc. Frank Clark QC Summary Project Name: Water Service Trench Reference Rec RPD QC Type Parameter Result Value Spike Conc Rec Limits RPD Limits Flags QCBatchlD VOC 63111_S N- butylbenzene ND pg /kg 1,2- Dichlorobenzene ND pg /kg 1,2- Dibromo -3- ND pg /kg chloropropane 1,2,4 - Trichlorobenzene ND pg /kg Hexachlorobutadiene ND pg /kg Naphthalene ND pg /kg 1,2,3 - Trichlorobenzene ND pg /kg Surrogate Result Spike Conc Recovery Rec Limits Dibromofluoromethane 52.6 pg /kg 50 pg /kg 105% 80 -120% 1,2 Dichloroethane -d4 52.3 pg /kg 50 pg /kg 105% 80 -120% Toluene -d8 49.5 pg /kg 50 pg /kg 99% 81 -117% 4- Bromofluorobenzene 45.9 pg /kg 50 pg /kg 92% 74 -121% LCS Dichlorodifluoromethane 38.1 pg /kg 50 pg /kg 76% 70 -130% Chloromethane 41.8 pg /kg 50 pg /kg 84% 70 -130% Vinyl Chloride 45.0 pg /kg 50 pg /kg 90% 70 -130% Bromomethane 35.7 pg /kg 50 pg /kg 71% 70 -130% Chloroethane 19.8 pg /kg 50 pg /kg 40% 70- 130% Q -7 Trichlorofluoromethane 50.8 pg /kg 50 pg /kg 102% 70 -130% 1,1- Dichloroethene 52.3 pg /kg 50 pg /kg 105% 70- 130% Acetonitrile 51.6 pg /kg 50 pg /kg 103% 60 -140% Methylene Chloride 45.7 pg /kg 50 pg /kg 91% 70 -130% Acrylonitrile 44.4 pg /kg 50 pg /kg 89% 60 -140% Trans -1,2- dichloroethene 46.5 pg /kg 50 pg /kg 93% 70- 130% MTBE 45.2 pg /kg 50 pg /kg 90% 70- 130% 1,1- Dichloroethane 45.8 pg /kg 50 pg /kg 92% 70- 130% 2,2- Dichloropropane 48.8 pg /kg 50 pg /kg 98% 70 -130% Cis -1,2- dichloroethene 46.2 pg /kg 50 pg /kg 92% 70 -130% 2- Butanone 44.0 pg /kg 50 pg /kg 88% 60 -140% Bromochloromethane 45.0 pg /kg 50 pg /kg 90% 60 -140% Chloroform 43.8 pg /kg 50 pg /kg 88% 70 -130% 1,1,1 - Trichloroethane 46.3 pg /kg 50 pg /kg 93% 70 -130% 1,1- Dichloropropene 43.6 pg /kg 50 pg /kg 87% 40 -160% Carbon Tetrachloride 46.6 pg /kg 50 pg /kg 93% 70 -130% Benzene 43.6 pg /kg 50 pg /kg 87% 70 -130% 1,2- Dichloroethane 43.1 pg /kg 50 pg /kg 86% 70 -130% Trichloroethene 43.8 pg /kg 50 pg /kg 88% 70 -130% 1,2- Dichloropropane 43.1 pg /kg 50 pg /kg 86% 70 -130% Dibromomethane 44.7 pg /kg 50 pg /kg 89% 70 -130% Bromodichloromethane 44.1 pg /kg 50 pg /kg 88% 70 -130% Cis -1,3- dichloropropene 46.3 pg /kg 50 pg /kg 93% 70 -130% 4- Methyl -2- pentanone 41.7 pg /kg 50 pg /kg 83% 60 -140% Toluene 42.7 pg /kg 50 pg /kg 85% 70 -130% www.nX!DnR.com • 1825 F. Plano Parkway #160 • Plano, TX 75074 • Tel' (972) 424 -6422 • Fax' (972) 424 -6508 , ACC w ° s� Order ID: 11120451 Z. =� er'∎ OXID0R Laboratories, LLI �� , ;r �� " Date: 12/27/2011 • Page 9 of 17 T104704227 -11 -6 W &M Environmental Group, Inc. Frank Clark QC Summary Project Name: Water Service Trench Reference Rec RPD QC Type Parameter Result Value Spike Conc Rec Limits RPD Limits Flags QCBatchlD VOC_63111_S Trans -1,3- dichloropropene 45.5 pg /kg 50 pg /kg 91% 70- 130% 1,1,2 - Trichloroethane 42.1 pg /kg 50 pg /kg 84% 70 -130% 1,3- Dichloropropane 42.3 pg /kg 50 pg /kg 85% 70 -130% Tetrachloroethene 43.3 pg /kg 50 pg /kg 87% 70 -130% 2- Hexanone 40.9 pg /kg 50 pg /kg 82% 60 -140% Dibromochloromethane 45.8 pg /kg 50 pg /kg 92% 70 -130% 1,2- Dibromoethane 43.2 pg /kg 50 pg /kg 86% 70 -130% Chlorobenzene 40.7 pg /kg 50 pg /kg 81% 70 -130% 1,1,1,2 - Tetrachloroethane 43.9 pg /kg 50 pg /kg 88% 70 -130% Ethylbenzene 42.5 pg /kg 50 pg /kg 85% 70 -130% m,p- Xylene 85.8 pg /kg 100 pg /kg 86% 70 -130% o- Xylene 44.1 pg /kg 50 pg /kg 88% 70 -130% Styrene 44.8 pg /kg 50 pg /kg 90% 70 -130% Bromoform 41.6 pg /kg 50 pg /kg 83% 70 -130% Isopropylbenzene 44.4 pg /kg 50 pg /kg 89% 70 -130% 1,1,2,2 - Tetrachloroethane 40.2 pg /kg 50 pg /kg 80% 70 -130% Bromobenzene 42.8 pg /kg 50 pg /kg 86% 70 -130% 1,2,3 - Trichloropropane 38.8 pg /kg 50 pg /kg 78% 70 -130% N- propylbenzene 45.0 pg /kg 50 pg /kg 90% 70 -130% 2- Chlorotoluene 44.0 pg /kg 50 pg /kg 88% 70 -130% 1,3,5 - Trimethylbenzene 45.0 pg /kg 50 pg /kg 90% 70 -130% 4- Chlorotoluene 44.1 pg /kg 50 pg /kg 88% 70 -130% Tert- butylbenzene 45.4 pg /kg 50 pg /kg 91% 70- 130% 1,2,4 - Trimethylbenzene 45.6 pg /kg 50 pg /kg 91% 70 -130% Sec - butylbenzene 45.4 pg /kg 50 pg /kg 91% 70 -130% 1,3- Dichlorobenzene 43.8 pg /kg 50 pg /kg 88% 70 -130% p- Isopropyltoluene 45.2 pg /kg 50 pg /kg 90% 70 -130% 1,4- Dichlorobenzene 42.8 pg /kg 50 pg /kg 86% 70 -130% N- butylbenzene 47.1 pg /kg 50 pg /kg 94% 70- 130% 1,2- Dichlorobenzene 44.2 pg /kg 50 pg /kg 88% 70 -130% 1,2- Dibromo -3- 41.7 pg /kg 50 pg /kg 83% 70 -130% chloropropane 1,2,4 - Trichlorobenzene 44.7 pg /kg 50 pg /kg 89% 70 -130% Hexachlorobutadiene 47.2 pg /kg 50 pg /kg 94% 70 -130% Naphthalene 37.6 pg /kg 50 pg /kg 75% 70 -130% 1,2,3 - Trichlorobenzene 42.0 pg /kg 50 pg /kg 84% 70 -130% Surrogate Result Spike Conc Recovery Rec Limits Dibromofluoromethane 52.4 pg /kg 50 pg /kg 105% 80 -120% 1,2 Dichloroethane -d4 48.7 pg /kg 50 pg /kg 97% 80 -120% Toluene -d8 50.1 pg /kg 50 pg /kg 100% 81 -117% 4- Bromofluorobenzene 50.0 pg /kg 50 pg /kg 100% 74-121% LCSD Dichlorodifluoromethane 37.4 pg /kg 50 pg /kg 75% 70 -130% 1.9% 0 -25% Chloromethane 42.1 pg /kg 50 pg /kg 84% 70 -130% 0.7% 0 -25% www.OXIDOR.com • 1825 E. Plano Parkway #160 • Plano, TX 75074 • Tel: (972) 424 -6422 • Fax: (972) 424 -6508 ,�E° `" -. - -: 'sa Order ID: 11120451 • =� OXIDOR Laboratories LLC �� , ; `` ° Date: 12/27/2011 Aim ? �, Itg v s Page 10of17 T104704227 -11 -6 W &M Environmental Group, Inc. Frank Clark QC Summary Project Name: Water Service Trench Reference Rec RPD QC Type Parameter Result Value Spike Conc Rec Limits RPD Limits Flags QCBatchlD VOC Vinyl Chloride 45.0 pg /kg 50 pg /kg 90% 70 -130% 0.0% 0 -25% Bromomethane 36.3 pg /kg 50 pg /kg 73% 70 -130% 1.7% 0 -25% Chloroethane 20.7 pg /kg 50 pg /kg 41% 70- 130% 4.4% 0 -25% Q -7 Trichlorofluoromethane 48.8 pg /kg 50 pg /kg 98% 70 -130% 4.0% 0 -25% 1,1- Dichloroethene 52.4 pg /kg 50 pg /kg 105% 70 -130% 0.2% 0 -25% Acetonitrile 50.9 pg /kg 50 pg /kg 102% 60 -140% 1.4% 0 -25% Methylene Chloride 46.6 pg /kg 50 pg /kg 93% 70- 130% 2.0% 0 -25% Acrylonitrile 46.5 pg /kg 50 pg /kg 93% 60- 140% 4.6% 0 -25% Trans -1,2- dichloroethene 47.4 pg /kg 50 pg /kg 95% 70 -130% 1.9% 0 -25% MTBE 47.9 pg /kg 50 pg /kg 96% 70 -130% 5.8% 0 -25% 1,1- Dichloroethane 47.1 pg /kg 50 pg /kg 94% 70 -130% 2.8% 0 -25% 2,2- Dichloropropane 50.9 pg /kg 50 pg /kg 102% 70- 130% 4.2% 0 -25% Cis -1,2- dichloroethene 47.4 pg /kg 50 pg /kg 95% 70 -130% 2.6% 0 -25% 2- Butanone 45.7 pg /kg 50 pg /kg 91% 60 -140% 3.8% 0 -25% Bromochloromethane 46.0 pg /kg 50 pg /kg 92% 60 -140% 2.2% 0 -25% Chloroform 44.5 pg /kg 50 pg /kg 89% 70 -130% 1.6% 0 -25% 1,1,1 - Trichloroethane 47.8 pg /kg 50 pg /kg 96% 70 -130% 3.2% 0 -25% 1,1- Dichloropropene 44.8 pg /kg 50 pg /kg 90% 40 -160% 2.7% 0 -25% Carbon Tetrachloride 48.5 pg /kg 50 pg /kg 97% 70 -130% 4.0% 0 -25% Benzene 45.0 pg /kg 50 pg /kg 90% 70 -130% 3.2% 0 -25% 1,2- Dichloroethane 45.1 pg /kg 50 pg /kg 90% 70 -130% 4.5% 0 -25% Trichloroethene 44.9 pg /kg 50 pg /kg 90% 70 -130% 2.5% 0 -25% 1,2- Dichloropropane 44.1 pg /kg 50 pg /kg 88% 70 -130% 2.3% 0 -25% Dibromomethane 45.6 pg /kg 50 pg /kg 91% 70 -130% 2.0% 0 -25% Bromodichloromethane 45.9 pg /kg 50 pg /kg 92% 70 -130% 4.0% 0 -25% Cis -1,3- dichloropropene 47.2 pg /kg 50 pg /kg 94% 70 -130% 1.9% 0 -25% 4- Methyl -2- pentanone 43.6 pg /kg 50 pg /kg 87% 60- 140% 4.5% 0 -25% Toluene 44.2 pg /kg 50 pg /kg 88% 70 -130% 3.5% 0 -25% Trans -1,3- dichloropropene 47.9 pg /kg 50 pg /kg 96% 70 -130% 5.1% 0 -25% 1,1,2 - Trichloroethane 43.8 pg /kg 50 pg /kg 88% 70 -130% 4.0% 0 -25% 1,3- Dichloropropane 43.8 pg /kg 50 pg /kg 88% 70 -130% 3.5% 0 -25% Tetrachloroethene 44.3 pg /kg 50 pg /kg 89% 70 -130% 2.3% 0 -25% 2- Hexanone 43.7 pg /kg 50 pg /kg 87% 60 -140% 6.6% 0 -25% Dibromochloromethane 47.7 pg /kg 50 pg /kg 95% 70 -130% 4.1% 0 -25% 1,2- Dibromoethane 45.0 pg /kg 50 pg /kg 90% 70 -130% 4.1% 0 -25% Chlorobenzene 42.9 pg /kg 50 pg /kg 86% 70 -130% 5.3% 0 -25% 1,1,1,2 - Tetrachloroethane 45.9 pg /kg 50 pg /kg 92% 70 -130% 4.5% 0 -25% Ethylbenzene 44.5 pg /kg 50 pg /kg 89% 70 -130% 4.6% 0 -25% m,p- Xylene 88.6 pg /kg 100 pg /kg 89% 70 -130% 3.2% 0 -25% o- Xylene 46.0 pg /kg 50 pg /kg 92% 70 -130% 4.2% 0 -25% Styrene 46.3 pg /kg 50 pg /kg 93% 70- 130% 3.3% 0 -25% Bromoform 44.2 pg /kg 50 pg /kg 88% 70 -130% 6.1% 0 -25% Isopropylbenzene 45.7 pg /kg 50 pg /kg 91% 70 -130% 2.9% 0 -25% www.OXIDOR.com • 1825 E. Plano Parkway #160 • Plano. TX 75074 • Tel: (972) 424 -6422 • Fax: (972) 424 -6508 ACC M ti � °'� oP ° s ti Order ID: 11120451 ..,` OXID0R Laboratories, LLC �° 4 Date: 12/27/2011 IIIMIN z Page 11 of 17 T104704227 -11 -6 W &M Environmental Group, Inc. Frank Clark QC Summary Project Name: Water Service Trench Reference Rec RPD QC Type Parameter Result Value Spike Conc Rec Limits RPD Limits Flags QCBatchlD VOC 1,1,2,2 - Tetrachloroethane 44.2 pg /kg 50 pg /kg 88% 70 -130% 9.5% 0 -25% Bromobenzene 44.6 pg /kg 50 pg /kg 89% 70 -130% 4.1% 0 -25% 1,2,3 - Trichloropropane 42.7 pg /kg 50 pg /kg 85% 70 -130% 9.6% 0 -25% N- propylbenzene 45.8 pg /kg 50 pg /kg 92% 70 -130% 1.8% 0 -25% 2- Chlorotoluene 44.8 pg /kg 50 pg /kg 90% 70 -130% 1.8% 0 -25% 1,3,5 - Trimethylbenzene 46.4 pg /kg 50 pg /kg 93% 70 -130% 3.1% 0 -25% 4- Chlorotoluene 45.3 pg /kg 50 pg /kg 91% 70 -130% 2.7% 0 -25% Tert- butylbenzene 46.4 pg /kg 50 pg /kg 93% 70 -130% 2.2% 0 -25% 1,2,4 - Trimethylbenzene 46.0 pg /kg 50 pg /kg 92% 70- 130% 0.9% 0 -25% Sec - butylbenzene 45.9 pg /kg 50 pg /kg 92% 70 -130% 1.1% 0 -25% 1,3- Dichlorobenzene 44.9 pg /kg 50 pg /kg 90% 70 -130% 2.5% 0 -25% p- Isopropyltoluene 45.7 pg /kg 50 pg /kg 91% 70 -130% 1.1% 0 -25% 1,4- Dichlorobenzene 43.8 pg /kg 50 pg /kg 88% 70 -130% 2.3% 0 -25% N- butylbenzene 47.3 pg /kg 50 pg /kg 95% 70 -130% 0.4% 0 -25% 1,2- Dichlorobenzene 46.0 pg /kg 50 pg /kg 92% 70 -130% 4.0% 0 -25% 1,2- Dibromo -3- 45.4 pg /kg 50 pg /kg 91% 70 -130% 8.5% 0 -25% chloropropane 1 ,2,4-Trichlorobenzene 46.9 pg /kg 50 pg /kg 94% 70 -130% 4.8% 0 -25% Hexachlorobutadiene 47.8 pg /kg 50 pg /kg 96% 70 -130% 1.3% 0 -25% Naphthalene 43.2 pg /kg 50 pg /kg 86% 70- 130% 13.9% 0 -25% 1 ,2,3-Trichlorobenzene 46.0 pg /kg 50 pg /kg 92% 70 -130% 9.1% 0 -25% Surrogate Result Spike Conc Recovery Rec Limits Dibromofluoromethane 52.7 pg /kg 50 pg /kg 105% 80 -120% 1,2 Dichloroethane -d4 49.5 pg /kg 50 pg /kg 99% 80- 120% Toluene -d8 49.5 pg /kg 50 pg /kg 99% 81 -117% 4- Bromofluorobenzene 50.4 pg /kg 50 pg /kg 101% 74-121% MS Dichlorodifluoromethane 39.6 pg /kg ND 50 pg /kg 79% 70 -130% Chloromethane 42.7 pg /kg ND 50 pg /kg 85% 70 -130% Vinyl Chloride 46.0 pg /kg ND 50 pg /kg 92% 70 -130% Bromomethane 38.8 pg /kg ND 50 pg /kg 78% 70 -130% Chloroethane 23.1 pg /kg ND 50 pg /kg 46% 70 -130% Q -7 Trichlorofluoromethane 50.7 pg /kg ND 50 pg /kg 101% 70 -130% 1,1- Dichloroethene 52.9 pg /kg ND 50 pg /kg 106% 70 -130% Acetonitrile 50.9 pg /kg ND 50 pg /kg 102% 60 -140% Methylene Chloride 50.3 pg /kg ND 50 pg /kg 101% 70 -130% Acrylonitrile 46.1 pg /kg ND 50 pg /kg 92% 60 -140% Trans -1,2- dichloroethene 46.9 pg /kg ND 50 pg /kg 94% 70 -130% MTBE 45.0 pg /kg ND 50 pg /kg 90% 70 -130% 1,1- Dichloroethane 46.0 pg /kg ND 50 pg /kg 92% 70 -130% 2,2- Dichloropropane 50.0 pg /kg ND 50 pg /kg 100% 70 -130% Cis -1,2- dichloroethene 46.1 pg /kg ND 50 pg /kg 92% 70 -130% 2- Butanone 37.3 pg /kg ND 50 pg /kg 75% 60 -140% Bromochloromethane 44.7 pg /kg ND 50 pg /kg 89% 60 -140% www.OXIDOR.com • 1825 E. Plano Parkway #160 • Plano, TX 75074 • Tel: (972) 424 -6422 • Fax: (972) 424 -6508 AIIIIIIIIr, j �r i 1 �7 t �e µ ACC0 .�, Order ID: 11120451 `"'\ VxInOlt. Laboratories LLC e� ' � Date: 12/27/2011 1. � ~ •_ Page 12 of 17 z T104704227 -11 -6 W &M Environmental Group, Inc. Frank Clark QC Summary Project Name: Water Service Trench Reference Rec RPD QC Type Parameter Result Value Spike Conc Rec Limits RPD Limits Flags QCBatchlD VOC 63111 S Chloroform 44.8 pg /kg ND 50 pg /kg 90% 70 -130% 1,1,1 - Trichloroethane 46.2 pg /kg ND 50 pg /kg 92% 70 -130% 1,1- Dichloropropene 44.1 pg /kg ND 50 pg /kg 88% 40 -160% Carbon Tetrachloride 47.2 pg /kg ND 50 pg /kg 94% 70 -130% Benzene 43.7 pg /kg ND 50 pg /kg 87% 70 -130% 1,2- Dichloroethane 43.4 pg /kg ND 50 pg /kg 87% 70 -130% Trichloroethene 75.0 pg /kg 55.16 pg /kg 50 pg /kg 40% 70 -130% Q -7 1,2- Dichloropropane 42.8 pg /kg ND 50 pg /kg 86% 70 -130% Dibromomethane 44.4 pg /kg ND 50 pg /kg 89% 70- 130% Bromodichloromethane 44.7 pg /kg ND 50 pg /kg 89% 70 -130% Cis -1,3- dichloropropene 45.9 pg /kg ND 50 pg /kg 92% 70 -130% 4- Methyl -2- pentanone 43.3 pg /kg ND 50 pg /kg 87% 60 -140% Toluene 42.9 pg /kg ND 50 pg /kg 86% 70 -130% Trans -1,3- dichloropropene 45.9 pg /kg ND 50 pg /kg 92% 70 -130% 1,1,2 - Trichloroethane 43.4 pg /kg ND 50 pg /kg 87% 70 -130% 1,3- Dichloropropane 42.8 pg /kg ND 50 pg /kg 86% 70 -130% Tetrachloroethene 43.4 pg /kg ND 50 pg /kg 87% 70 -130% 2- Hexanone 42.6 pg /kg ND 50 pg /kg 85% 60 -140% Dibromochloromethane 45.7 pg /kg ND 50 pg /kg 91% 70 -130% 1,2- Dibromoethane 43.1 pg /kg ND 50 pg /kg 86% 70 -130% Chlorobenzene 40.5 pg /kg ND 50 pg /kg 81% 70 -130% 1,1,1,2 - Tetrachloroethane 43.4 pg /kg ND 50 pg /kg 87% 70 -130% Ethylbenzene 42.4 pg /kg ND 50 pg /kg 85% 70 -130% m,p- Xylene 84.7 pg /kg ND 100 pg /kg 85% 70 -130% o- Xylene 43.5 pg /kg ND 50 pg /kg 87% 70 -130% Styrene 44.3 pg /kg ND 50 pg /kg 89% 70 -130% Bromoform 40.4 pg /kg ND 50 pg /kg 81% 70 -130% Isopropylbenzene 43.5 pg /kg ND 50 pg /kg 87% 70- 130% 1,1,2,2 - Tetrachloroethane 40.1 pg /kg ND 50 pg /kg 80% 70 -130% Bromobenzene 41.5 pg /kg ND 50 pg /kg 83% 70 -130% 1,2,3 - Trichloropropane 40.3 pg /kg ND 50 pg /kg 81% 70 -130% N- propylbenzene 44.0 pg /kg ND 50 pg /kg 88% 70- 130% 2- Chlorotoluene 43.3 pg /kg ND 50 pg /kg 87% 70 -130% 1,3,5 - Trimethylbenzene 44.4 pg /kg ND 50 pg /kg 89% 70 -130% 4- Chlorotoluene 43.5 pg /kg ND 50 pg /kg 87% 70 -130% Tert- butylbenzene 44.5 pg /kg ND 50 pg /kg 89% 70 -130% 1,2,4 - Trimethylbenzene 44.5 pg /kg ND 50 pg /kg 89% 70- 130% Sec - butylbenzene 43.7 pg /kg ND 50 pg /kg 87% 70 -130% 1,3- Dichlorobenzene 42.3 pg /kg ND 50 pg /kg 85% 70 -130% p- Isopropyltoluene 44.1 pg /kg ND 50 pg /kg 88% 70 -130% 1,4- Dichlorobenzene 42.0 pg /kg ND 50 pg /kg 84% 70 -130% N- butylbenzene 45.4 pg /kg ND 50 pg /kg 91% 70 -130% 1,2- Dichlorobenzene 43.0 pg /kg ND 50 pg /kg 86% 70 -130% www.OXIDOR.com • 1825 E. Plano Parkway #160 • Plano, TX 75074 • Tel: (972) 424 -6422 • Fax: (972) 424 -6508 3 , ,ri Acc0, / , s� Order ID: 11120451 ^::: OXIDOR Laboratories LLC �c „ e + * Date: 12/27/2011 num < x Page 13of17 T104704227 -11 -6 W &M Environmental Group, Inc. Frank Clark QC Summary Project Name: Water Service Trench Reference Rec RPD QC Type Parameter Result Value Spike Conc Rec Limits RPD Limits Flags QCBatchlD VOC 63111_S 1,2- Dibromo -3- 41.5 pg /kg ND 50 pg /kg 83% 70 -130% chloropropane 1,2,4 - Trichlorobenzene 42.4 pg /kg ND 50 pg /kg 85% 70 -130% Hexachlorobutadiene 43.7 pg /kg ND 50 pg /kg 87% 70 -130% Naphthalene 37.0 pg /kg ND 50 pg /kg 74% 70 -130% 1,2,3 - Trichlorobenzene 39.7 pg /kg ND 50 pg /kg 79% 70 -130% Surrogate Result Spike Conc Recovery Rec Limits Dibromofluoromethane 52.6 pg /kg 50 pg /kg 105% 80 -120% 1,2 Dichloroethane -d4 49.7 pg /kg 50 pg /kg 99% 80 -120% Toluene -d8 50.6 pg /kg 50 pg /kg 101% 81 -117% 4- Bromofluorobenzene 49.7 pg /kg 50 pg /kg 99% 74-121% MSD Dichlorodifluoromethane 38.4 pg /kg ND 50 pg /kg 77% 70 -130% 3.1% 0 -25% Chloromethane 42.0 pg /kg ND 50 pg /kg 84% 70 -130% 1.7% 0 -25% Vinyl Chloride 44.7 pg /kg ND 50 pg /kg 89% 70 -130% 2.9% 0 -25% Bromomethane 38.3 pg /kg ND 50 pg /kg 77% 70 -130% 1.3% 0 -25% Chloroethane 22.2 pg /kg ND 50 pg /kg 44% 70- 130% 4.0% 0 -25% Q -7 Trichlorofluoromethane 49.6 pg /kg ND 50 pg /kg 99% 70 -130% 2.2% 0 -25% 1,1- Dichloroethene 52.1 pg /kg ND 50 pg /kg 104% 70 -130% 1.5% 0 -25% Acetonitrile 49.8 pg /kg ND 50 pg /kg 100% 60- 140% 2.2% 0 -25% Methylene Chloride 49.9 pg /kg ND 50 pg /kg 100% 70 -130% 0.8% 0 -25% Acrylonitrile 45.8 pg /kg ND 50 pg /kg 92% 60 -140% 0.7% 0 -25% Trans -1,2- dichloroethene 46.5 pg /kg ND 50 pg /kg 93% 70- 130% 0.9% 0 -25% MTBE 45.4 pg /kg ND 50 pg /kg 91% 70 -130% 0.9% 0 -25% 1,1- Dichloroethane 45.9 pg /kg ND 50 pg /kg 92% 70 -130% 0.2% 0 -25% 2,2- Dichloropropane 49.7 pg /kg ND 50 pg /kg 99% 70 -130% 0.6% 0 -25% Cis -1,2- dichloroethene 46.0 pg /kg ND 50 pg /kg 92% 70 -130% 0.2% 0 -25% 2- Butanone 44.7 pg /kg ND 50 pg /kg 89% 60 -140% 18.0% 0 -25% Bromochloromethane 44.6 pg /kg ND 50 pg /kg 89% 60 -140% 0.2% 0 -25% Chloroform 44.8 pg /kg ND 50 pg /kg 90% 70 -130% 0.0% 0 -25% 1,1,1 - Trichloroethane 46.0 pg /kg ND 50 pg /kg 92% 70 -130% 0.4% 0 -25% 1,1- Dichloropropene 43.8 pg /kg ND 50 pg /kg 88% 40 -160% 0.7% 0 -25% Carbon Tetrachloride 47.0 pg /kg ND 50 pg /kg 94% 70 -130% 0.4% 0 -25% Benzene 43.6 pg /kg ND 50 pg /kg 87% 70 -130% 0.2% 0 -25% 1,2- Dichloroethane 43.8 pg /kg ND 50 pg /kg 88% 70 -130% 0.9% 0 -25% Trichloroethene 70.6 pg /kg 55.16 pg /kg 50 pg /kg 31% 70- 130% 6.0% 0 -25% Q -7 1,2- Dichloropropane 42.8 pg /kg ND 50 pg /kg 86% 70 -130% 0.0% 0 -25% Dibromomethane 43.6 pg /kg ND 50 pg /kg 87% 70 -130% 1.8% 0 -25% Bromodichloromethane 44.2 pg /kg ND 50 pg /kg 88% 70- 130% 1.1% 0 -25% Cis -1,3- dichloropropene 45.6 pg /kg ND 50 pg /kg 91% 70 -130% 0.7% 0 -25% 4- Methyl -2- pentanone 44.2 pg /kg ND 50 pg /kg 88% 60 -140% 2.1% 0 -25% Toluene 43.1 pg /kg ND 50 pg /kg 86% 70 -130% 0.5% 0 -25% Trans -1,3- dichloropropene 46.0 pg /kg ND 50 pg /kg 92% 70 -130% 0.2% 0 -25% 1,1,2 - Trichloroethane 43.3 pg /kg ND 50 pg /kg 87% 70 -130% 0.2% 0 -25% www.OXIDOR.com • 1825 E. Plano Parkway #160 • Plano. TX 75074 • Tel: (972) 424 -6422 • Fax: (972) 424 - 6508 ,µ Acco 1� Ec o Order ID: 11120451 ° - � ,-- - r e Date: 12/27/2011 � --�. OXIDOR Laboratories LLC Q wIA1N �~`• < s Page 14 of 17 T104704227-11-6 W &M Environmental Group, Inc. Frank Clark QC Summary Project Name: Water Service Trench Reference Rec RPD QC Type Parameter Result Value Spike Conc Rec Limits RPD Limits Flags QCBatchlD VOC 1,3- Dichloropropane 42.9 pg /kg ND 50 pg /kg 86% 70- 130% 0.2% 0 -25% Tetrachloroethene 43.0 pg /kg ND 50 pg /kg 86% 70 -130% 0.9% 0 -25% 2- Hexanone 43.4 pg /kg ND 50 pg /kg 87% 60- 140% 1.9% 0 -25% Dibromochloromethane 45.4 pg /kg ND 50 pg /kg 91% 70 -130% 0.7% 0 -25% 1,2- Dibromoethane 43.8 pg /kg ND 50 pg /kg 88% 70 -130% 1.6% 0 -25% Chlorobenzene 41.6 pg /kg ND 50 pg /kg 83% 70 -130% 2.7% 0 -25% 1,1,1,2 - Tetrachloroethane 44.2 pg /kg ND 50 pg /kg 88% 70 -130% 1.8% 0 -25% Ethylbenzene 43.1 pg /kg ND 50 pg /kg 86% 70 -130% 1.6% 0 -25% m,p- Xylene 84.2 pg /kg ND 100 pg /kg 84% 70- 130% 0.6% 0 -25% o- Xylene 43.8 pg /kg ND 50 pg /kg 88% 70 -130% 0.7% 0 -25% Styrene 44.1 pg /kg ND 50 pg /kg 88% 70 -130% 0.5% 0 -25% Bromoform 41.4 pg /kg ND 50 pg /kg 83% 70 -130% 2.4% 0 -25% Isopropylbenzene 43.7 pg /kg ND 50 pg /kg 87% 70 -130% 0.5% 0 -25% 1,1,2,2 - Tetrachloroethane 40.8 pg /kg ND 50 pg /kg 82% 70 -130% 1.7% 0 -25% Bromobenzene 41.8 pg /kg ND 50 pg /kg 84% 70 -130% 0.7% 0 -25% 1,2,3 - Trichloropropane 41.4 pg /kg ND 50 pg /kg 83% 70 -130% 2.7% 0 -25% N- propylbenzene 43.2 pg /kg ND 50 pg /kg 86% 70 -130% 1.8% 0 -25% 2- Chlorotoluene 43.0 pg /kg ND 50 pg /kg 86% 70 -130% 0.7% 0 -25% 1,3,5 - Trimethylbenzene 44.2 pg /kg ND 50 pg /kg 88% 70 -130% 0.5% 0 -25% 4- Chlorotoluene 43.8 pg /kg ND 50 pg /kg 88% 70 -130% 0.7% 0 -25% Tert - butylbenzene 44.2 pg /kg ND 50 pg /kg 88% 70 -130% 0.7% 0 -25% 1,2,4 - Trimethylbenzene 44.4 pg /kg ND 50 pg /kg 89% 70 -130% 0.2% 0 -25% Sec - butylbenzene 43.6 pg /kg ND 50 pg /kg 87% 70 -130% 0.2% 0 -25% 1,3- Dichlorobenzene 42.7 pg /kg ND 50 pg /kg 85% 70 -130% 0.9% 0 -25% p- Isopropyltoluene 43.4 pg /kg ND 50 pg /kg 87% 70 -130% 1.6% 0 -25% 1,4- Dichlorobenzene 42.0 pg /kg ND 50 pg /kg 84% 70- 130% 0.0% 0 -25% N- butylbenzene 44.8 pg /kg ND 50 pg /kg 90% 70 -130% 1.3% 0 -25% 1,2- Dichlorobenzene 43.3 pg /kg ND 50 pg /kg 87% 70 -130% 0.7% 0 -25% 1,2- Dibromo -3- 42.5 pg /kg ND 50 pg /kg 85% 70 -130% 2.4% 0 -25% chloropropane 1,2,4 - Trichlorobenzene 42.9 pg /kg ND 50 pg /kg 86% 70 -130% 1.2% 0 -25% Hexachlorobutadiene 41.9 pg /kg ND 50 pg /kg 84% 70 -130% 4.2% 0 -25% Naphthalene 39.0 pg /kg ND 50 pg /kg 78% 70 -130% 5.3% 0 -25% 1,2,3 - Trichlorobenzene 41.3 pg /kg ND 50 pg /kg 83% 70 -130% 4.0% 0 -25% Surrogate Result Spike Conc Recovery Rec Limits Dibromofluoromethane 52.6 pg /kg 50 pg /kg 105% 80 -120% 1,2 Dichloroethane -d4 49.9 pg /kg 50 pg /kg 100% 80 -120% Toluene -d8 50.6 pg /kg 50 pg /kg 101% 81 -117% 4- Bromofluorobenzene 49.5 pg /kg 50 pg /kg 99% 74 -121% www OXIDOR.com • 1825 E. Plano Parkway #160 • Plano, TX 75074 • Tel: (972) 424 -6422 • Fax: (972) 424 -6508 ACCp MIN ti �s �, Order ID: 11120451 OXIDOR Laboratories LLC Date: 12/27/2011 Moo � • Page 15 of 17 T104704227 -11 -6 W &M Environmental Group, Inc. Frank Clark Case Narrative Project Name: Water Service Trench D -1 Elevated reporting limit(s) due to dilution. Dilution resulted from sample matrix interference, high target analyte(s), high non - target analyte(s) or a combination thereof. Q -7 Recovery and /or RPD outside desirable limits. ppm Parts per million = mg /Kg or mg /L ppb Parts per billion = ug /Kg or ug /L MQL Method quantitation limit SDL Sample detection limit (reflects any laboratory adjustments made to the sample during analysis such as dry weight or dilutions) SQL Sample quantitation limit (reflects any laboratory adjustments made to the sample during analysis such as dry weight or dilution ND Analyte not detected at or above SQL LCS /LCSD Laboratory control spike / Laboratory control spike duplicate MS /MSD Matrix spike / Matrix spike duplicate RPD Relative percent difference Sub Analysis performed by subcontract laboratory • Refer to QC section Solid sample results reported on a dry weight basis for all applicable analysis, unless otherwise noted. Dry weight calculations based upon % solids obtained as outlined in EPA method 5035 section 7.5 Volatiles CCV percent recoveries of Dichlorodifluoromethane, Bromomethane, Chloroethane, 2- Butanone, Chloroform, 2- 1-lexanone, 4- Methyl -2- pentanone, 1,1,2,2 - Tertachloroethane, 1,2,3 - Trichloropropane, and Naphthalene for QC Batch ID VOC63111_S were lower than Oxidor QC limits. This report is intended only for the use of W &M Environmental Group, Inc. and may contain information that is privileged and confidential. It may not be reproduced in full (or in part) without the expressed written permission of W &M Environmental Group, Inc. and Oxidor Laboratories, LLC. Oxidor Laboratories, LLC certifies to the best of its knowledge that all results contained in this report are consistent with the National Environmental Laboratory Accreditation Program, except where otherwise noted. www.OXIDOR.com • 1825 E. Plano Parkway #160 • Plano, TX 75074 • Tel: (972) 424 -6422 • Fax: (972) 424 -6508 �� r cca, Order ID: 11120451 11111111114 =,. OXIDOR Laboratories 3p` , LLC _ Date: 12/27/2011 Mow e' •n' . 7 Page 16 of 17 T104704227 -11 -6 W &M Environmental Group, Inc. Frank Clark Sample Preservation Verification Project Name: Water Service Trench Receipt temp: 5.1 °C on Ice All applicable VOA's received free of headspace: N/A Receipt method: Client Custody seal intact: Not Present All samples / labels received intact: Yes Customer Sample ID: Water svc. Trench Collected By: Frank Clark Oxidor Sample ID: 11120451 - 001 Collector Affiliation: Collected: 12/16/11 13:20 Matrix: Solid Indicated Bottle Type Count Collection Method Parts / Interval Preservation �H 4 oz Glass Jar 2 Grab Temp - Sample conditions at time of receipt at laboratory verified in part or in whole by: E.T. www.OXIDOR.com • 1825 E. Plano Parkway #160 • Plano. TX 75074 • Tel (972) 424 -6422 • Fax (972) 424 -6508 :.. Yt. ACC09 \ E G - o s y Order ID: 11120451 =' OxID0R Laboratories LLC ;.� :- Dare: 12/27/2011 c f; yA $,; s Page 17 of 17 T104704227 -11 -6 Chain of Custody PROJECT DESCRIPTION: Water Service Trench OXIt1OR l_llx),.,locies, LLC Chain of Custody Record I lill ei 1825 ET - aY- 8160 o ` ° a ! Plane. TX X 7507 750748570 8570 �n Page o f P 972 424 1)422 t 972 424 6506 V cuslomeraetarceQoaldor WA Repel Ts Protect / Report InfmMion 'Company Name . Circle Requested T • e (Less ter 2 Days must be milled wah Lab) b Tin • . M G i+a kbI �,t• � 7 -1D Days 6.7 Days RUSH 3-4 Days . 2 Days ASAP Melrose W / irk- ray Pr°/ed Name � i Ca 77-49-~ t Cry IP�aN4. Slate 2 Prated Location e ,a� fr �/ Cddad Name � /' � f �. _ / t„ j.(.Lt/LA/ Pmlecl t r'P Corded Eraaa l " / , - ` � ,/` k 0 , `sf. � '7'r • Sampler Nome ,,..a i� i ■ Sampler Company Fat Sa Phone - mpbr Spnalura � • /v �,Y'- In, sof, 16. 0, End Inmoke To (Oak NDlywenl ham above) Matrix Codes Special Inanxlgns' Company Nome L - Liquid S - So d VS- Napes A - Art Address Preservation Codes 1 -None 4 -HCI Coy Slate zip 2 HNO 5 - N*Odi 'Please confirm condaionel requests odor 10 addracnal analysis 3 • H,SD, G ice ' Requested Analysis COMO! tame 7.O her _ __, Collards Codes ^ e w Phew Fn. P • Plaster: G - Gass 9 ii O - Oita Orrdder I D Sample Info 0 1 C3 1 r r Customer Sample ID u Q �1 Date rite s 13 t 2 g i _ , 1" Ti $ ‘10.0 / - \� )0C . QOl 1 NJSBs. '. 7 �.�e e /2 /MA !31° )< 1 2 4 6 4 %' 2 • 3 4 6 6 7 6 9 10 r 11 ., 12 13 14 15 Mar ueha AadrMiwr OBa Time ♦ M. Renewed by mirage... NAY Time W Yl 1ilit / J gsalad by Wagon Pero keno Rocuped by Mh#l4n Dote Tent RelYquiYad by 4fNet0e NO. 7... r lee 11114 /► YO 1 s&banal of samples ogrefies p.ro4 .1 07700R s standard Terms and catdaloris. r� •c 5tYfl NI 000 Rev 40 ODOR cannot accept rebel changes to Ina 0ceumeel. Please ipt Drennan written rwjdR tom Temp at Rec Cf - II4 www OXIDOR com • 1R25 F Plano Parkway #160 • Plano TX 75074 • TPI: (972) 424 -6422 • Fax: (972) 474 -65DR