Laserfiche WebLink
Mill <br /> Creek - — <br /> Water Resource and Environmental Consulting <br /> Associates <br /> FEB 2 2 1995 <br /> February 16, 1995 <br /> ENVIRONMENTAL HEALTH <br /> Mr. Mike Infurna PERMIT/SERVICES <br /> San Joaquin County Environmental Health Division <br /> P.O. Box 2009 <br /> Stockton, CA 95201-2009 <br /> RE: Souza Property (APN: 238-080-01) <br /> Lammers and Byron Roads, Tracy, CA <br /> Dear Mr. Infurna, <br /> This letter summarizes well installation, monitoring and sampling <br /> activities conducted at the above referenced site (parcel 1 on the <br /> attached Figure 1) and the adjacent Nicholaw property (parcel 1 on <br /> Figure 1) . This work was performed in accordance with our workplan <br /> of November 8, 1995 and our workplan addendum of November 30, 1995. <br /> In December, the subsurface investigation was undertaken which <br /> • consisted of sampling soils and groundwater from 3 wells on each of <br /> these parcels (a total of 6 wells) . One soil sample and one water <br /> sample were collected from each well and submitted for the suite of <br /> petroleum hydrocarbon analyses requested in your letter to Patrick <br /> Riddle dated November 29, 1995. These results are summarized on <br /> the attached Tables. Although the work was done concurrently at <br /> both properties, separate Site Investigation Reports are being <br /> prepared, and this letter has been prepared to address subsurface <br /> conditions and recommendations only with respect to the Souza <br /> parcel (APN: 238-080-01) . <br /> Figure 1 shows the wells locations on each property and Figure two <br /> presents the local gradient derived from the six wells. Survey <br /> data is attached. <br /> The revious, reports for the adjacent parcel known as the Nicholaw <br /> property APN 238-080-02) indicated low levels of xyleBes and <br /> __slies_e_l_hy_.drocarbons in soil samples taken from near the capillary <br /> zone in the northern most portion of the site (within 600 feet of <br /> Byron Road) . A groundwater sample from a single well on-site <br /> contained diesel hydrocarbons and low levels of BTEX. The <br /> subsequent investigation has confirmed the low to moderate levels <br /> of soil contamination in that area of parcel 238-080-02 , however, <br /> analysis of water samples from two wells (MW1-2 and MW3-2 on Figure <br /> 1) along Byron Road did not detect petroleum hydrocarbons. On the <br /> adjacent Souza property (APN 238-080-01) , petroleum hydrocarbon <br /> analytes were below detection limits in soil samples from the <br /> capillary zone in all three wells, with the exception of <br /> Post Office Box 130 • Milford, Ca. 96121 • Ph. 916253-2155 • Fax 916-253-2294 <br />