SITE INFORMATION AND CORRESPONDENCE

Home Browse Search

Chevron Chevron Chevron Environmental Management April 30, 2001 Company 6001 Bollinger Canyon Road P.0.Box 6012 San Ramon,CA 94583 0712 Ms. Wendy Cohen California Regional Water Quality Control Board, Robert D.Mihalovich Pipeline Program Manager Central Valley Region Phone:(925)842-1341 3443 Routier Road, Suite A Facsimile:(925)842-0213 Sacramento, California 95827-3003 Evaluation of Potential Impact from Proposed Percolation/Retention Ponds Pombo Property (APN 232-170-07) 1755 West 111h Street Tracy, California and Ridgeway (former Burns) Property (APN 232-170-05) 1881 Rustan Road Tracy, California Dear Ms. Cohen: Per our April 27, 2001 telephone conversation, Chevron Environmental Management Company (Chevron) is submitting the subject report for your review. This report documents a Geomatrix Consultants, Inc. (Geomatrix) April 2001 evaluation of the potential impact from two storm water percolation/retention.ponds that Regency Centers (Regency), the property developer, plans to construct on the subject properties. Chevron requests that the Regional Board review the subject report as soon as possible. Chevron and Regency are available to meet with Regional A Board staff to review the findings of this report and the planned pond construction. It is Chevron's understanding that Regency plans tq start construction of the ponds during the week of May 14, 2001. Chevron has performed environmental investigation activities at the Pombo and Ridgeway (former Burns) properties. These activities were documented in reports which were transmitted to your office in February 2001. Based on the results of the April 2001 evaluation, Regency intends to modify their percolation/retention pond design to excavate petroleum-affected soil within the pond footprint on the Pombo property and to install a barrier over the remaining in-place affected soil to minimize effects of dissolved-phase constituents within the shallow aquifer zone. Regency intends to reuse the excavated petroleum-affected soil beneath paved in-fill areas of the . P P , Ridgeway property development; soil reuse will be performed as outlined in the Soil Management Plan (enclosed). In order to facilitate your staff's review of the subject document, Chevron herein approves the use of the Bruns Property cost recovery account for your staff's review time for this site.