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4 . Soil samples will be collected during drilling at a minimum <br /> of five foot intervals starting at five feet below grade for <br /> field characterization. Two soil samples from above the water <br /> table in the boring will be laboratory analyzed for benzene, <br /> toluene, and xylene (BTX) and total purgeable (volatile) <br /> petroleum hydrocarbons (TVH) . All sampling and analysis will be <br /> conducted in accordance with standard EPA protocol . A State <br /> Certified Laboratory will be used to perform the analyses, as <br /> required by law. All excavated soils will be placed on plastic <br /> sheeting and remain on site until the laboratory test results are <br /> received . A proposal for treatment or disposal of the excavated <br /> material will be prepared after reviewing the soil sample <br /> results . <br /> 5. Groundwater level will be monitored to determine depth. <br /> 6 . A water sample will be collected from the monitoring well <br /> after purging a minimum of four well volumes (casing and sand <br /> pack ) . The purged water will remain on site, in secured 55 <br /> gallon drums, until laboratory results are received . If <br /> necessary, a proposal for the disposal of the water produced <br /> during well development will be prepared after reviewing the <br /> sample results . Water samples will be analyzed by a State <br /> Certified Laboratory for BTX and TVH. <br /> 7 . A brief report will be prepared summarizing the findings of <br /> the investigation and recommending further site characterization <br /> or remedial action, if appropriate . The field investigations <br /> will be conducted under the direct supervision of Russell Juncal, <br /> a California registered geologist (no . 3864 ) who will also review <br /> and sign the summary report . <br /> A completed permit for the monitoring well installations and a <br /> $35. 00 check to cover the filing fee are attached . In addition, <br /> a copy of this proposal has been forwarded to the California <br /> Regional Water Quality Control Board, as per your request . <br /> If you have any questions regarding our proposed investigation or <br /> require additional information, please contact me at our <br /> Sacramento office . <br /> Respectfully, <br /> terWork <br /> Russell W. Juncal <br /> CA Registered Geologist No . 3864 <br /> RWJ:ect <br /> Attachment <br /> cc Stella Ruiz <br /> Gordon Boggs, CRWQCD - Central Valley Region <br />