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TABLE 5 <br /> SUMMARY OF GROUNDWATER ANALYTICAL RESULTS(PAHs)t,2s <br /> MOUNTAIN HOUSE DEVELOPMENT SITE#6 <br /> Mountain House, San Joaquin County,California <br /> Concentrations inµg/L <br /> a y y y <br /> a41 <br /> L`° I 0 0 0 0 . N a� o w v <br /> Boring/ Collection Date aa a c a c � Q a� i <br /> Well ID Method Sampled <br /> SCREENING WQO 20 4 --- 2100 5 0.04 5 0.004 5 0.04 5 --- 0.04 5 0.4 5 0.0085 5 280 5 280 5 0.04 5 21 4 --- 210 5 <br /> LEVELS ESL 20 6 210 ' 22 6 0.029 ' 0.014 B 0.029 ' 0.13 6 0.029 ' 0.35 8 0.0048 ' 5 8 3.9 8 0.048 ' 17 ' 4.6 8 2 8 <br /> S13-1 G 3/17/2008 <0.010 E <0.010 E 0.042 E <0.010 E <0.0030 E <0.010 E <0.010 E <0.010 E <0.010 E <0.0030 E 0.021 E 0.015 E <0.010 E <0.050 E 0.069 E 0.013 E <br /> S13-2 G 3/17/2008 <0.010 E <0.010 E 0.012 E <0.010 E <0.0030 E <0.010 E <0.010 E <0.010 E <0.010 E 0.0064 EJ <0.010 E 0.012 E <0.010 E <0.050 E 0.019 E <0.010 E <br /> S13-3 G 3/17/2008 <0.010 E <0.010 E 0.014 E <0.010 E <0.0030 E <0.010 E <0.010 E <0.010 E <0.010 E <0.0030 E <0.010 E <0.010 E <0.010 E 0.051 E 0.026 E <0.010 E <br /> S13-4 G 3/18/2008 <0.010 E <0.010 E 0.016 E <0.010 E <0.0030 E <0.010 E <0.010 E <0.010 E <0.010 E <0.0030 E <0.010 E 0.019 E <0.010 E <0.050 E 0.051 E <0.010 E <br /> S13-413 G 3/18/2008 <0.010 <0.010 0.016 1 <0.010 <0.0030 <0.010 <0.010 <0.010 <0.010 0.0040 J <0.010 0.013 <0.010 <0.050 0.045 1 <0.010 <br /> S13-6 G 3/18/2008 <0.010 <0.010 <0.010 <0.010 <0.0030 <0.010 <0.010 <0.010 <0.010 <0.0030 <0.010 <0.010 <0.010 <0.050 <0.010 <0.010 <br /> S13-7 G 3/19/2008 <0.010 <0.010 <0.010 <0.010 0.0040 J <0.010 <0.010 <0.010 <0.010 0.0032 J <0.010 <0.010 <0.010 <0.050 0.023 0.013 <br /> S13-8 G 3/19/2008 <0.010 <0.010 <0.010 <0.010 <0.0030 <0.010 <0.010 <0.010 <0.010 0.0036 EJ <0.010 <0.010 <0.010 0.062 0.029 E <0.010 <br /> S13-813 G 3/19/2008 <0.010 <0.010 <0.010 <0.010 <0.0030 <0.010 <0.010 <0.010 <0.010 <0.0030 E <0.010 <0.010 <0.010 0.058 0.025 E <0.010 <br /> SB-10(35') HP 3/20/2008 0.011 <0.010 <0.010 <0.010 <0.0030 <0.010 <0.010 <0.010 <0.010 <0.0030 <0.010 0.036 <0.010 <0.050 0.031 0.045 <br /> SB-12 G 3/21/2008 0.034 <0.010 <0.010 <0.010 <0.0030 <0.010 <0.010 <0.010 <0.010 <0.0030 <0.010 0.15 <0.010 <0.050 0.19 <0.010 <br /> SB-15(30') HP 3/24/2008 0.034 <0.010 <0.010 <0.010 <0.0030 <0.010 <0.010 <0.010 <0.010 <0.0030 <0.010 0.13 <0.010 0.074 0.15 0.048 <br /> SB-17 G 3/25/2008 <0.010 <0.010 <0.010 <0.010 <0.0030 1 <0.010 <0.010 I <0.010 <0.010 <0.0030 <0.010 <0.010 <0.010 <0.050 0.020 <0.010 <br /> SB-18 G 3/25/2008 <0.010 <0.010 <0.010 <0.010 <0.0030 <0.010 <0.010 <0.010 <0.010 <0.0030 <0.010 <0.010 <0.010 <0.050 <0.010 <0.010 <br /> SB-19 G 3/26/2008 <0.010 <0.010 0.011 <0.010 <0.0030 <0.010 <0.010 <0.010 <0.010 <0.0030 <0.010 <0.010 <0.010 <0.050 <0.010 <0.010 <br /> SB-20 G 3/26/2008 <0.010 <0.010 <0.010 <0.010 <0.0030 <0.010 <0.010 <0.010 <0.010 <0.0030 <0.010 <0.010 <0.010 <0.050 <0.010 <0.010 <br /> SB-23 G 3/28/2008 <0.010 <0.010 <0.010 <0.010 <0.0032 <0.010 <0.010 <0.010 <0.010 <0.0032 0.026 0.018 <0.010 0.16 0.034 0.011 <br /> SB-24 G 3/28/2008 <0.010 <0.010 <0.010 <0.010 <0.0030 <0.010 <0.010 <0.010 <0.010 <0.0030 <0.010 <0.010 <0.010 <0.050 0.012 El <0.010 <br /> SB-25 G 3/31/2008 <0.010 <0.010 0.023 <0.010 <0.0030 <0.010 <0.010 <0.010 <0.010 <0.0030 <0.010 <0.010 <0.010 <0.050 <0.010 <0.010 <br /> SB-26 G 3/31/2008 <0.010 <0.010 0.015 <0.010 <0.0030 <0.010 <0.010 <0.010 <0.010 <0.0030 <0.010 <0.010 <0.010 0.082 E <0.010 <0.010 <br /> SB 27 G 4/1/2008 <0.010 <0.010 I <0.010 <0.010 <0.0030 <0.010 <0.010 <0.010 <0.010 <0.0030 <0.010 <0.010 <0.010 <0.050 <0.010 <0.010 <br /> SB-28 G 4/1/2008 <0.010 <0.010 <0.010 <0.010 <0.0030 <0.010 <0.010 <0.010 <0.010 <0.0030 <0.010 <0.010 <0.010 0.097E 0.024 <0.010 <br /> Abbreviations: Notes: <br /> <=Denotes analyte not detected at or above the laboratory reporting limit 1. Samples were collected by SAIC and were analyzed by Lancaster Laboratories,Inc.,using EPA Method 8270C SIM or LVI. <br /> D=Duplicate Sample The QC limits for PAHs and surrogate standard recoveries by LVI GC/MS are advisory only until sufficient data points can <br /> E=Estimated value based on surrogate recovery level be obtained to calculatestatistical limits. <br /> EPA=U.S.Environmental Protection Agency 2. Results in bold exceed WQOs and/or ESLs. <br /> ESL=Environmental Screening Level 3. See Appendix E.1 for data usability summary. <br /> G =Grab groundwater sample collected using peristaltic pump and prepacked well screen 4. WQO(Tastes and Odors)that prohibits adverse tastes and odors or nuisance conditions. <br /> GC/MS=Gas chromatography/mass spectrometry 5. WQO(Toxicity)that prohibits toxic chemicals in toxic amounts. <br /> ID=Identification 6. ESL(for protection of current or potential drinking water resource)based on Ceiling Value. <br /> HP=Depth-discrete groundwater sample collected using Hydropunch equipment,peristaltic pump,and pre-packed well screen 7. ESL(for protection of current or potential drinking water resource)based on Drinking Water Toxicity. <br /> J=Estimated concentration detected between Method Detection Limit and Limit Of Quantitation 8. ESL(for protection of current or potential drinking water resource)based on Aquatic Habitat Goal. <br /> LVI=Large-volume injection <br /> PAHs=Polynuclear aromatic hydrocarbons Sources: <br /> QC=Quality control WQOs from the Central Valley RWQCB Water Quality Control Plan(Basin Plan)for the Sacramento River Basin and the San <br /> RWQCB=Regional Water Quality Control Board Joaquin River Basin,4th ed.(Revised August 2006). <br /> SAIC=Science Applications International Corporation ESLs from the San Francisco Bay RWQCB Screening for Environmental Concerns at Sites with Contaminated Soil and Groundwater <br /> SIM=Selective ion monitoring (Interim Final November 2007[Revised May 2008]). _ <br /> WQO=Water Quality Objective = <br /> µg/L=Micrograms per liter <br /> �tf�m <br /> From Science to Solations <br /> Page 1 of 1 <br />