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1 L <br /> SECOR <br /> hitt rrrrl�unrtJ Itrcn�f�u�rttccl <br /> May 1, 2000 <br /> Mr Marty Hartzell <br /> California RWQCB Central Valley Region <br /> 3443 Routier Road, Suite A <br /> Sacramento, Ca 95827-3098 <br /> Subject. Quarterly Monitoring and Sampling Report (Q2/2000) <br /> Ranch Market <br /> 23569 Santa Fe Road <br /> Riverbank, California <br /> SECOR Project No. 077 41898 <br /> Dear Mr Hartzell <br /> SECOR International Incorporated (SECOR) submits this quarterly report to summarize the <br /> methods and results of second quarter 2000 groundwater monitoring and sampling for the above <br /> referenced-site (Figures 1 and 2, Attachment 1) <br /> Groundwater monitoring and sampling were conducted on April 6, 2000 to determine water table <br /> elevation and the distribution of dissolved hydrocarbons in the site-related groundwater <br /> monitoring wells <br /> BACKGROUND <br /> The site is located at the southwestern intersection of Santa Fe Road and Henry Road in <br /> Riverbank, California (Figure 1) Facilities onsite consist of a single story brick building with a <br /> septic tank and leach field The remainder of the Site is covered with asphalt paving Currently <br /> the Site is being used as a mini-market without gasoline service <br /> Underground Storage Tank Removal <br /> On May 20, 1991, three underground storage tanks (UST) were removed from a common tank <br /> pit (Figure 2) Strong hydrocarbon odors and discolored soil was observed by SJCEHD in the <br /> tank pit following removal of the tanks Tank pit floor soil samples collected at depths of 9 to 11 <br /> feet below ground surface (bgs) contained reportable concentrations of gasoline range petroleum <br /> hydrocarbons (Attachment 2, Table 1) <br /> 40 <br /> File Riverbank-00 2Q rpt dac <br /> �rll_'l9 l%w( +N Prill !)sur tirrrli 100 \rrc �(lm'w" C I '15ti_— i"Ir,� r,t l tivi r V/ri+ ,r, t titi�� I rr� tr <br />