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MONITORING AND REPORTING PROGRAM -3- <br /> SETTLING DRY CLEANING DEFENDANTS <br /> LINCOLN VILLAGE CENTER <br /> GROUNDWATER TREATMENT SYSTEM <br /> SAN JOAQUIN COUNTY <br /> Sampling <br /> Constituents Units Type of Sample Frequencyl <br /> BTEX3 µg4 Grab Monthly <br /> Total Petroleum µg/1 Grab Monthly <br /> Hydrocarbons <br /> Lead(total) m94 Grab Quarterly4 <br /> Oxygenate Compounds' µ94 Grab Monthly <br /> 1 Samp ling frequency starting with the first week of full-scale operation for influent and <br /> effluent sampling and for water level measurements in the extraction and injection wells will <br /> be daily for week one, every other day for week two,weekly for weeks three through twelve, <br /> and monthly beginning with week thirteen. <br /> 2 By EPA Method 601 or equivalent. If any monthly sample contains detectable <br /> concentrations of volatile organic compounds above the practical quantitation limit(PQL) of <br /> 0.5µg/1,the Discharger shall immediately resample and reanalyze the effluent for the detected <br /> constituent(s), and shall continue sampling the effluent on a weekly basis until the <br /> constituent(s) concentrations are below the PQL. <br /> 3 BTEX= analyses for benzene,toluene,xylene and ethylbenzene by EPA Method 602 or <br /> equivalent. If any monthly sample contains detectable concentrations of BTEX <br /> constituent(s) above the PQL of 0.5 µg4,the Discharger shall immediately resample and <br /> reanalyze the effluent for the detected constituent(s), and shall continue sampling the effluent <br /> on a weekly basis until the constituent(s) concentrations are below the PQL. <br /> 4 If any quarterly sample shows a detectable lead concentration,the Discharger shall increase <br /> the sampling frequency to monthly. <br /> ' By EPA Method 8260 <br /> THREE SPECIES CHRONIC TOXICITY MONITORING <br /> Effluent toxicity monitoring shall be conducted to determine whether the effluent is likely to <br /> contribute toxicity to Fourteen Mile Slough. The monitoring shall be conducted as specified in <br /> the EPA 600/4-91-002. Effluent toxicity samples shall be collected at the discharge of the <br /> treatment system prior to being discharged into the storm drain. Grab samples shall be <br /> representative of the volume and quality of the discharge. Time of collection of samples shall be <br />