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Ms . Lewis <br /> March 15 , 2004 <br /> Page 2 <br /> Emergency Response" guidelines ( CCR Title 8 , Section 5192 ) , SECOR will prepare a Site - Specific <br /> Health and Safety Plan prior to starting field work . The Site - Specific Health and Safety Plan will be <br /> reviewed by the staff and subcontractors before beginning field operations at the Site . <br /> PERMITTING <br /> San Joaquin County — Environmental Health Department ( SJC- EHD ) permits and City of Tracy <br /> encroachment permits for the three soil borings will be obtained prior to commencement of field <br /> activities . <br /> SOIL BORINGS <br /> Three soil borings will be vacuum -cleared to 8 feet below ground surface ( bgs) . The soil borings will <br /> then be advanced with a 6 - inch standard hollow-stem auger , or similar equipment at the locations <br /> shown on Figure 2 . The borings will be completed to approximately 15-feet bgs or to a depth where <br /> substantial groundwater yield is encountered . At the total depth , 0 . 010- inch slotted well screen will <br /> be placed in the bottom of the boring and threaded to blank pipe to extend above the ground <br /> surface . A diagram of the temporary well to be constructed in each soil boring is presented as <br /> Figure 3 . <br /> Locations and depths may be modified based on field conditions observed during fieldwork . <br /> Following collection of a representative groundwater sample , the temporary well casing will be <br /> removed and the soil boring will be backfilled in compliance with SJC- EHD requirements . Field and <br /> laboratory procedures are presented in Attachment 2 . <br /> SOIL SAMPLING <br /> During vacuum - clearing activities , soil samples will be screened , through each 5400t interval for the <br /> presence of petroleum hydrocarbons . Screening with a photo- ionization detector will allow for <br /> selection of discrete interval samples to be analyzed . <br /> Positive screening results , suggesting hydrocarbons are present , will be used to select soil samples <br /> for laboratory analyses . A minimum of one shallow sample from each boring location will be <br /> collected in a brass sleeve and submitted under a chain - of - custody record to a California State - <br /> certified laboratory for chemical analysis . Sample handling techniques are described in Attachment <br /> 2 , <br /> GROUNDWATER SAMPLING <br /> Dedicated polyethylene tubing and a peristaltic pump or a disposable bailer will be used to sample <br /> each temporary well . Groundwater will be placed in laboratory- supplied glassware and submitted <br /> under chain - of -custody record to a California State - certified laboratory for chemical analysis . <br /> Sample handling techniques are described in Attachment 2 . <br /> F. <br /> I : Chevron\pipeline\Reports\Chevron Pipeline Assessment Work Plan . doc <br />